JP7156677B2 - Laminated plate material structure manufacturing method - Google Patents

Description

The present invention relates to a method for manufacturing a laminated plate material structure.

2. Description of the Related Art Conventionally, rotor cores and stator cores used in rotary electric machines such as electric motors and generators are obtained by laminating and integrating a plurality of metal plates such as electromagnetic steel plates. In order to stack and integrate a plurality of such metal plates, generally, metal plates adjacent in the stacking direction are joined by caulking. For example, first, a crimped portion is formed in which one surface side of the metal plate is a convex portion and the other surface side is a concave portion. Next, the surface of the crimped portion of the metal plate on the convex side and the surface of the crimped portion of the adjacent metal plate on the concave side in the stacking direction face each other, and the metal plates are laminated while fitting the convex portion into the concave portion.

Patent Literature 1 discloses a laminated core used for a rotor of an electric motor and a manufacturing method thereof. FIG. 13B shows a laminated core (laminated plate material structure) 1000 disclosed in Patent Document 1, and FIG.
The iron core piece 1010 is punched up from its back surface at a predetermined planar view position to form a concave portion 1010c on a back surface 1010a and simultaneously form a convex portion (protrusion) 1010d on a front surface 1010b.
Laminated core 1000 is obtained by laminating two core pieces 1010, and fitting convex portion 1010d formed on the surface of lower core piece 1010 into concave portion 1010c formed on the back surface of upper core piece 1010 to 1010, 1010 are fixed. In this manner, the core pieces 1010 are stacked one after another, and the respective protrusions 1010d are fitted into the recesses 1010c, thereby forming the laminated engagment 1000. As shown in FIG. An opening 1010e is formed in the core piece 1010 of the uppermost layer, and the protrusion 1010d of the core piece 1010 of the lower layer is fitted into the opening 1010e.

JP 2006-345657 A

However, in Patent Document 1, since the concave portion 1010c and the convex portion 1010d are formed for each core piece 1010, the forming positions, sizes and shapes of the concave portions 1010c and the convex portions 1010d vary. It is believed that this is due to manufacturing errors in the recesses and protrusions, environmental errors such as temperature and humidity, and material property errors of the metal pieces.
Therefore, when the core pieces 1010 are stacked and the protrusion 1010d of the core piece 1010 is to be fitted into the recess 1010c of the core piece 1010 adjacent in the stacking direction, the protrusion cannot be smoothly fitted into the recess. can be. In addition, if the protrusion and the recess are forcibly fitted, the fixing force due to the fitting of the two is reduced, resulting in variations in the fixing force. Furthermore, if the projection is forcibly fitted into the recess, the core piece will be deformed, increasing the internal stress and impairing long-term reliability. Thus, the initial and long-term reliability of the laminated core 1000 is degraded.
Furthermore, since the step of forming the concave portion and the convex portion of each metal piece and the step of fitting the convex portion of the metal piece into the concave portion of the adjacent metal piece are performed separately, the manufacturing cost increases.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-described problems, and to provide a method for manufacturing a laminated plate material structure that enables the laminated plate members to be firmly fixed to each other without difficulty, and that facilitates the production thereof.

(1) A method for manufacturing a laminated plate structure according to the present invention is a method for manufacturing a laminated plate structure in which a second plate is laminated on a first plate and bonded to each other, and a small plate is attached to a predetermined portion of the first plate. A small hole punching step of punching a hole, a second plate stacking step of stacking the second plate on the first plate, and a surface of the second plate corresponding to a planar view position of the small hole in the first plate a half-blanking dowel forming step of press-fitting a half-blanking punch into the surface of the second plate member to form a half-blanking dowel in the second plate member at a position; , the tip of the half-punched dowel is protruded from the back surface of the second plate member, and the protruding portion, which is the protruding portion, is press-fitted into the small hole of the first plate member, thereby It is characterized by joining plate materials.

According to the present invention, the half-blanked dowel forming step is performed after the small hole punching step of punching a small hole at a predetermined location in the first plate material and the second plate stacking step of stacking the second plate material on the first plate material. In this half-blanking dowel forming step, a half-blanking punch is press-fitted into the surface of the second plate member at a surface position of the second plate member corresponding to the position of the small hole in the first plate member in a plan view, thereby forming the second plate member. 2 Form a half punched dowel on the board. The tip of the half-blanked dowel protrudes from the back surface of the second plate member. Join the boards together. Therefore, the projecting portion of the half-blanked dowel can be reliably press-fitted into the small hole of the first plate member. Therefore, it is possible to stabilize the fixing force between the stacked plate materials.
In the case of FIG. 13 (conventional example), the formation position, size and shape of the concave portion 1010c and the convex portion 1010d of each core piece 1010 are varied, and if the convex portion and the concave portion are forcibly fitted, the core piece is deformed. , the internal stress is increased and the initial and long-term reliability is impaired. In contrast, according to the present invention, even if the position of the small hole in the first plate material and the position of the half-blanking punch in plan view deviate slightly, the half-blanking punch presses the back surface of the second plate material by pressing force. It is possible to reliably press-fit the protruding part protruding from the hole into the small hole. Therefore, the fixing force between the stacked plate materials can be stabilized. Moreover, both plate materials are not distorted or deformed, and therefore internal stress is not accumulated, so that initial and long-term reliability can be ensured.

In addition, in the conventional example, a concave-convex portion forming step of forming concave portions and convex portions on each plate member, and a fitting step of stacking the other plate member and fitting the convex portion of the other plate member into the concave portion of the other plate member. 2 steps are performed. In contrast, in the present invention, the half-blanked dowel forming step includes the step of projecting the half-blanked dowel from the back surface of the second plate member and the step of fixing the first plate member and the second plate member. . Therefore, it is possible to shorten the manufacturing process and reduce the manufacturing cost.

The second plate of the present invention may be configured using the first plate, or may be configured using a member separate from the first plate. In the former case, the second plate member is configured using a tip region that does not include the perforated portion of the small hole in the predetermined region that includes the perforated portion of the small hole of the first plate member. The tip region of the first plate member is bent 180° in the plate thickness direction and laminated on the surface of the predetermined region of the first plate member. The tip region laminated on the surface of the predetermined region of the first plate becomes the second plate.
Further, the half-blanking dowel refers to a dowel that includes a projecting portion that protrudes from the back surface of the second plate member by press-fitting a half-blanking punch from the front surface of the second plate member to the middle of the plate thickness. The half-punched dowel is held by the second plate within the thickness of the second plate.

(2) A method for manufacturing a laminated plate material structure of the present invention is the method for manufacturing a laminated plate material structure described in (1), wherein in the small hole punching step, the small hole is punched using a small hole punch. and a die, and the diameter of the tip of the small hole punch in plan view is preferably smaller than the thickness of the first plate.

According to the present invention, in the small hole punching step, the diameter of the tip of the small hole punch in plan view is smaller than the thickness of the first plate material, so that the inner wall of the small hole punched by the small hole punch is smooth. A long hard sheared surface is formed, and a short rough and brittle fractured surface is formed. Moreover, the sheared surface is formed on the inner wall of the small hole on the surface side (the side on which the small hole punch is inserted).
Therefore, in the half-blanking dowel forming step, when the half-blanking punch is pressed into the surface of the second plate, the first plate around the small hole can effectively function as a die. That is, since the surface side portion of the inner wall of the small hole is smooth and has a long hard sheared surface, the protruding portion of the half-blanking dowel strongly presses the first plate material around the small hole when the half-blanking punch is press-fitted. However, the first plate is not crushed, and the projecting portion of the half-punched dowel can be smoothly introduced into the small hole.

(3) A method for manufacturing a laminated plate structure according to the present invention is the method for manufacturing a laminated plate structure according to (1) or (2), wherein in the half-blanked dowel forming step, the half-blanked dowel is formed. It is preferable that the press-fitting depth of the protrusion into the small hole of the first plate is in the range of 0.2 to 0.8 of the inner wall length of the small hole.

According to the present invention, in the half-blanked dowel forming step, the press-fitting depth of the protruding portion of the half-blanked dowel into the small hole of the first plate member is the inner wall length of the small hole (equivalent to the plate thickness of the first plate member). ) is preferably in the range of 0.2 to 0.8. Therefore, the half-blanked dowel is held by the second plate member with a sufficient holding force, and at the same time, the projecting portion of the half-blanked dowel can hold the first plate member with a sufficient holding force. Here, when the press-fitting depth is less than 0.2 of the inner wall length of the small hole, the fitting length between the protrusion and the inner wall of the small hole becomes short, and the protrusion retains the first plate member with a sufficient force. unable to hold. Further, if the press-fitting depth exceeds 0.8 of the inner wall length of the small hole, the half-blanked dowel will not be held by the second plate member with a sufficient holding force. Therefore, the press-fitting depth is preferably in the range of 0.2 to 0.8 of the inner wall length of the small hole.
The press-fitting depth is more preferably 0.4 to 0.6 of the inner wall length of the small hole, more preferably 0.5.

(4) A method for manufacturing a laminated plate structure according to the present invention is the method for manufacturing a laminated plate structure according to any one of (1) to (3), wherein the half punch dowel forming step comprises the half It is preferable that the planar view shape and planar view area of the tip of the punch for punching are the same as the planar view shape and planar view area of the small hole punched in the first plate member.

According to the present invention, the tip of the punch for half-blanking has the same plane view shape and plane view area as the plane view shape and plane view area of the small hole punched in the first plate. Only the portion of the second plate facing the hole can be pressed by the punch for half blanking. Therefore, it is possible to smoothly project the projecting portion of the half-blanking dowel into the small hole by pressing the half-blanking punch. Moreover, since the protruding portion of the half-blanked dowel has the same shape and area as the plan view of the small hole, it can be press-fitted into the small hole without difficulty, thereby strengthening the connection between the first plate member and the second plate member. can be done.

(5) A method for manufacturing a laminated plate structure according to the present invention is the method for manufacturing a laminated plate structure according to any one of (1) to (4), wherein in the half-blanked dowel forming step, the first A half-blanking dowel holder is inserted into the small hole from the back side of one plate, and the half-blanking punch is press-fitted into the surface of the second plate. It is preferred to form compressed half-blanked dowels.

According to the present invention, in the half-blanking dowel forming step, the half-blanking dowel receiver is inserted into the small hole from the back side of the first plate, and the half-blanking punch is press-fitted into the surface of the second plate. . Therefore, the half-blanking dowel is compressed in the thickness direction of the first plate by the half-blanking punch and the half-blanking dowel receiver. As a reaction to this compression, the half-blanked dowel tends to expand in the radial direction, so the contact force between the half-blanked dowel and the inner wall of the small hole of the first plate member and the formation of the half-blanked dowel and the half-blanked dowel of the second plate member The contact force with the inner wall increases. For this reason, the half-punched dowels make the connection between the first plate member and the second plate member stronger.

(6) A method for manufacturing a laminated plate structure according to the present invention is the method for manufacturing a laminated plate structure according to any one of (1) to (5), wherein the half-blanked dowel forming step comprises the first It is preferable that the inner wall of the small hole drilled in one plate is formed in a reverse tapered surface so that the width of the hole on the back side of the small hole is larger than the width of the hole on the front side.

According to the present invention, in the half-blanking dowel forming step, when the half-blanking punch presses the surface of the second plate member, the half-blanking dowel is formed, and the projecting portion of the half-blanking dowel protrudes into the small hole. The protruding portion protrudes into the small hole while being pressed and compressed by the half-punching punch, and thus expands along the reverse tapered surface of the inner wall of the small hole. Therefore, the projecting portion is locked to the reverse tapered surface of the small hole and is securely held. For this reason, the second plate member is strongly bonded to the first plate member.

(7) A method for manufacturing a laminated plate structure according to the present invention is the method for manufacturing a laminated plate structure according to any one of (1) to (6), wherein the first plate and the second plate are The second plate material stacking step is a step of bending a tip region of a predetermined region including a predetermined portion in which a small hole is formed in the first plate member, and the bending step includes bending the tip region. is bent 180 degrees toward the surface side of the predetermined region, and the tip region bent 180 degrees is laminated as the second plate on the predetermined region of the first plate.

According to the invention, the first plate and the second plate are connected (bonded) at the 180° bend on the one hand and at the half-blanked dowel on the other hand. Therefore, it is possible to strongly bond the two plate members together. Furthermore, since the two plate members are joined at the 180° bent portion and the half-blanked dowel portion, it is possible to bring the two plate members into close contact with each other over a wide area.

(8) A method for manufacturing a laminated plate structure according to the present invention is the method for manufacturing a laminated plate structure according to any one of (1) to (6), wherein the first plate and the second plate are It is preferably constructed from separate plates.

According to the present invention, since the first plate material and the second plate material are composed of separate plate materials, the material, plate thickness, hardness, and treatment state such as heat treatment of both plate materials can be arbitrarily selected according to the application. It becomes possible to Further, the third plate is laminated on the second plate, and the two plates are joined together with half-punched dowels by the manufacturing method of the present invention. It is also easy to join the plate materials to each other with half-punched dowels by the manufacturing method of the present invention.

(9) The method for manufacturing a laminated plate structure of the present invention is the method for manufacturing a laminated plate structure described in (8), wherein the hardness of the first plate is the same as or the hardness of the second plate. It is preferable that the hardness is higher than that of the second plate.

According to the present invention, since the hardness of the first plate is the same as or higher than the hardness of the second plate, in the half-blanking dowel forming step, when the half-blanking punch presses the second plate, , the first plate is not crushed, and the first plate can function as a die of the press mold, and the small hole can function as a die hole. Therefore, the projecting portion of the half-blanked dowel can be reliably press-fitted into the small hole.

(10) A method for manufacturing a laminated plate structure according to the present invention is the method for manufacturing a laminated plate structure according to (8) or (9), wherein the thickness of the first plate is equal to that of the second plate. It is preferable that the plate thickness is the same as or thicker than the plate thickness of the second plate material.

According to the present invention, since the thickness of the first plate material is the same as or thicker than the thickness of the second plate material, in the half-blanking dowel forming step, the half-blanking punch is used to press the second plate material. When pressing, the first plate is not crushed, and the first plate can function as a die of the press mold, and the small hole can function as a die hole. Therefore, the projecting portion of the half-blanked dowel can be reliably press-fitted into the small hole of the first plate member.

(11) A method for manufacturing a laminated plate structure according to the present invention is the method for manufacturing a laminated plate structure according to any one of (1) to (10), wherein the first plate is made of a tape-shaped plate. , the step of punching the small holes, the step of laminating the second plate material, and the step of forming the half-punched dowels are performed as the tape-like plate material is conveyed, and furthermore, a laminated plate structure is separated from the tape-like plate material. It is preferred to carry out a body separation step.

According to the present invention, the first plate is made of a tape-shaped plate, and as the tape-shaped plate is conveyed, the step of punching small holes, the step of laminating the second plate, and the step of forming half-punched dowels are performed. Since the laminated plate structure separation step for separating the laminated plate structure is performed, each step can be performed continuously. Therefore, it is possible to manufacture the laminated plate structure at low cost and with high quality.

1 is a cross-sectional view of a laminated plate structure 1 according to Embodiment 1 of the present invention; FIG. It is process drawing explaining the manufacturing method of the laminated board material structure 1 of Embodiment 1 of this invention. It is explanatory drawing explaining the manufacturing method of the laminated plate material structure 1 of Embodiment 1 of this invention. FIG. 3 is a cross-sectional view of a laminated plate material structure 101 according to Embodiment 2 of the present invention; It is process drawing explaining the manufacturing method of the laminated board material structure 101 of Embodiment 2 of this invention. It is explanatory drawing explaining the manufacturing method of the laminated board material structure 101 of Embodiment 2 of this invention. FIG. 10 is an explanatory diagram for explaining a half-blanked dowel forming step 40 of Modification 1 of the present invention; FIG. 11 is an explanatory diagram for explaining a half-blanked dowel forming step 40 of Modification 2 of the present invention; FIG. 11 is an explanatory diagram for explaining a half-blanked dowel forming step 40 of Modification 3 of the present invention; FIG. 11 is an explanatory diagram for explaining a half-blanked dowel forming step 40 of Modification 4 of the present invention; FIG. 11 is an explanatory diagram for explaining a half-blanked dowel forming step 40 of Modification 5 of the present invention; FIG. 11 is an explanatory diagram for explaining a half-blanked dowel forming step 40 of Modification 6 of the present invention; FIG. 10 is a cross-sectional view of a conventional core piece 1010 and a laminated core 1000;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be specifically described based on embodiments.

[Embodiment 1]
Embodiment 1 of the present invention is a method of manufacturing a laminated plate material structure 1 in which the laminated plate material structure of the present invention is applied to a radiator plate of a semiconductor module M. FIG.
1 is a cross-sectional view of the laminated plate material structure 1 of Embodiment 1, FIG. 2 is a process diagram for explaining a manufacturing method of the laminated plate material structure 1 of Embodiment 1, and FIG. 3 is the laminated plate material structure 1 of Embodiment 1. It is an explanatory view explaining a manufacturing method of. FIG. 3(1) is a plan view of the tape-shaped plate material W corresponding to each step of the first embodiment, and FIG. 3(2) is a cross-sectional view taken along the line AA of FIG. 3(1). A processing device is also illustrated, and FIG. 3(3) is an enlarged view of a part of FIG. 3(2).

The laminated plate structure 1 obtained by the manufacturing method of Embodiment 1 of the present invention, as shown in FIG. The plate members 3 are laminated and the plate members 2 and 3 are joined to each other. At the connection point between the two plate members 2 and 3, a protruding portion 3b of a half-blanked dowel 3a formed in the second plate member 3 is press-fitted into a small hole 2a drilled at a predetermined location in the first plate member 2. As shown in FIG.
The laminated plate material structure 1 of Embodiment 1 is arranged on the bottom surface of the semiconductor module M and used as a heat sink for the semiconductor module M, as shown in FIG. Since the first plate material and the second plate material are laminated, the laminated plate material structure 1 of Embodiment 1 can be formed thickly, and the heat dissipation property of the semiconductor module M can be improved.

In the method for manufacturing the laminated plate material structure 1 of Embodiment 1, a tape-shaped plate material W is used, as shown in FIG. A forming step 40 and a laminated plate material structure separating step 50 are performed in this order. In the second plate material stacking step 30, a right angle bending step 31, a 135° bending step 34, and a 180° bending step 36 are performed in this order.
The tape-shaped plate material W used in the method for manufacturing the laminated plate material structure 1 of Embodiment 1 is made of highly malleable and relatively high-hardness metal such as stainless steel (SUS304, etc.), brass, beryllium copper, and aluminum. . The tape-shaped plate material W is intermittently transported along the transport direction P in FIG. 3(1), and each step is performed during each transport stop. Sprocket holes Wh for transport are formed at equal intervals along the transport direction P at both ends of the tape-shaped plate material W in the width direction. In FIG. 3B, Wj is the front surface of the tape-shaped plate material W, and We is the back surface of the tape-shaped plate material W. As shown in FIG.
Each step will be described in detail below.

[Predetermined Area Forming Step]
The predetermined region forming step 10 is a step of forming a predetermined region Wa for forming the laminated plate structure 1 in the tape-shaped plate material W. As shown in FIG. As shown in FIG. 3(1), the predetermined area Wa is a cantilever portion, and is formed by punching out a notch Wb having a U-shape in plan view in the tape-like plate material W. As shown in FIG. The notch portion Wb is formed by pressing the tape-shaped plate material W with an upper die 11 and a lower die 12, as shown in FIG. 3(2).

In addition, from the small hole punching step 20 described below to the laminated plate material structure separating step 50 described later, a flat region (flat region Wd) that is not bent at right angles, 135° and 180° in the predetermined region Wa is , the first plate material 2 in the laminated plate material structure 1 separated from the tape-shaped plate material W in the laminated plate material structure separating step 50 . Therefore, the flat region Wd will be referred to as the first plate member 2 (Wd) in the following description. Similarly, from the small hole punching step 20 to the laminated plate material structure separation step 50 described later, the leading end region Wc bent at right angles, 135° and 180° is separated from the tape-shaped plate material W by the laminated plate structure separation step 50. The separated laminated plate material structure 1 becomes the second plate material 3 . Therefore, the tip end region Wc will be described as the second plate member 3 (Wc) hereinafter.

[Small hole drilling process]
The small hole punching step 20 is a step of punching small holes 2a in the first plate member 2 (Wd) of the tape-like plate member W formed in the predetermined area forming step 10 . As shown in FIG. 3(2), the small holes 2a are formed by pressing a small hole punch 21 arranged above the tape-shaped plate material W against the surface of the tape-shaped plate material W, and arranged below the tape-shaped plate material W. It is formed by lowering it into the die 22 for small holes.
A planar view diameter (outer diameter) 21d of the tip of the small hole punch 21 is smaller than the hole diameter 22d of the small hole die by the clearance.

Further, the diameter 21d of the tip of the small hole punch 21 in plan view is smaller than the thickness Wt of the tape-shaped plate material W. As shown in FIG. Therefore, in the subsequent half-blanking dowel forming step 40, when the half-blanking punch 41 is pressed inward from the surface 3c (We) of the second plate 3 (Wc), the first plate around the small hole 2a 2 (Wd) can effectively exhibit the function of the half-blanking die. That is, since the inner wall of the small hole 2a on the side of the surface 2c (Wj) has a long hard sheared surface, the pressing of the half-punching punch 41 pushes the second plate 3 (Wc) downward from the back surface 3e (Wj). Even if the protruding portion 3b is formed, it is possible to prevent the protruding portion 3b from crushing or deforming the small hole 2a. In addition, since the sheared surface has a smooth surface, it is possible to smoothly introduce the protrusion 3b into the small hole 2a.
The planar view diameter 21d of the tip of the small hole punch 21 may be the same as the thickness Wt of the tape-shaped plate material W or may be larger than the thickness Wt of the tape-shaped plate material W. FIG.

The predetermined region forming step 10 and the small hole punching step 20 are not limited to being performed in the above order, and the order may be changed as appropriate. For example, the small hole punching step 20 may be performed first, and then the predetermined area forming step 10 may be performed, or the predetermined area forming step 10 and the small hole punching step 20 may be performed simultaneously.

[Right angle bending process]
In the right angle bending process 31, the second plate material 3 (Wc) of the tape-shaped plate material W in which the small holes 2a are formed in the small hole punching process 20 is turned to the surface Wj side (the upper side in FIG. 3(2)) at a substantially right angle. This is the step of folding In the process of bending the second plate 3 (Wc) at right angles, as shown in FIG. A die 33 for right angle bending is used. When the central portion of the predetermined area Wa of the tape-shaped plate material W is pushed up by the punch 32 for bending at right angles, the second plate material 3 (Wc) is bent upward at right angles.

[135° bending process]
The 135° bending step 34 is a step of bending the second plate member 3 (Wc), which has been bent at right angles in the right angle bending step 31, to approximately 135°. The step of bending the second plate material 3 (Wc) to 135° is performed using a 135° bending punch 35 arranged above the tape-like plate material W, as shown in FIG. 3(2). When the second plate member 3 (Wc) of the tape-shaped plate member W is pushed down by the 135° bending punch 35, the second plate member 3 (Wc) is bent at 135°.

[180° bending process]
The 180° bending step 36 is a step of bending the second plate member 3 (Wc) that has been bent to 135° in the 135° bending step 34 by approximately 180°. The step of bending the second plate material 3 (Wc) to 180° is performed using a 180° bending punch 37 arranged above the tape-like plate material W as shown in FIG. 3(2). When the punch 37 for 180° bending pushes down the second plate 3 (Wc) of the tape-shaped plate W, the second plate 3 (Wc) is bent at 180°.
Therefore, the second plate member 3 (Wc) is laminated on the first plate member 2 (Wd) that is not bent in the predetermined area Wa.

[Half punch dowel forming process]
The half-blanked dowel forming step 40 for the second plate 3 (Wc) is a step of forming the half-blanked dowel 3a in the second plate 3 (Wc) laminated on the first plate 2 (Wd) by the 180° bending step 36. is. 3(2) and 3(3), the half-blanked dowel forming step 40 is carried out on the second plate member 3 (Wc) corresponding to the position in plan view of the small hole 2a drilled in the first plate member 2 (Wd). The half-blanking punch 41 is press-fitted into the surface 3c (We) of the second plate 3 (Wc) (up to the halfway position of the plate thickness Ws of the second plate 3 (Wc)) to form the half-blanking dowel 3a. is formed, the tip of the half-blanked dowel 3a protrudes from the back surface 3e (Wj) of the second plate 3 (Wc), and the protruding portion 3b is press-fitted into the small hole 2a of the first plate 2 (Wd). , the step of joining the first plate member 2 (Wd) and the second plate member 3 (Wc) to each other.

In the half-blanking dowel forming step 40, as shown in FIG. When the surface 3c (We) of the second plate member 3 (Wc) is pressed into the inside from the surface 3c (We), the first plate member 2 (Wd) around the small hole 2a plays the role of a die (the small hole 2a becomes a die hole), A half-blanked dowel 3a protrudes from the back surface 3e (Wj) of the second plate 3 (Wc) toward the first plate 2 (Wd).
The outer diameter 41d of the half-blanking punch 41 is formed to be the same as the inner diameter 2ad of the small hole 2a. That is, in the half-blanking dowel forming step 40, the plan view shape and plan view area of the tip of the half-punch punch 41 are the same as the plan view shape and plan view area of the small hole 2a punched in the first plate 2 (Wd). are identical. Therefore, the plan view shape and plan view area of the half-blanked dowel 3a are the same as the plan view shape and plan view area of the small hole 2a drilled in the first plate member 2 (Wd). Therefore, the projecting portion 3b of the half-blanked dowel 3a is smoothly press-fitted into the small hole 2a. At this time, the first plate member 2 (Wd) is not deformed even if the projecting portion 3b is press-fitted into the small hole 2a. Therefore, the bonding strength between the half-punched dowel 3a and the second plate member 3 (Wc) can be enhanced. As described above, the half-blanked dowels 3a enable the first plate member 2 (Wd) and the second plate member 3 (Wc) to be firmly connected to each other.
A sheared surface and a fractured surface are formed on the outer peripheral wall of the half-blanked dowel 3a.

In the half-blanked dowel forming step 40, the press-fitting depth 3aa when the projecting portion 3b of the half-blanked dowel 3a is press-fitted into the small hole 2a of the first plate 2 (Wd) is the length of the inner wall of the small hole 2a (the first 1 plate 2 (Wd), that is, the plate thickness Wt of the tape-shaped plate W is preferably in the range of 0.2 to 0.8. Therefore, the half-punched dowel 3a is held by the second plate 3 (Wc) with a sufficient holding length, and the projecting portion 3b of the half-punched dowel 3a holds the first plate 2 (Wd) with a sufficient holding force. becomes possible. Here, when the press-fit depth 3aa at which the projecting portion 3b of the half-blanked dowel 3a is press-fit into the small hole 2a of the first plate 2 (Wd) is less than 0.2 of the inner wall length (Wt) of the small hole 2a, the projection The fitting length between the portion 3b and the inner wall of the small hole 2a is shortened, and the projecting portion 3b cannot hold the first plate member 2 (Wd) with a sufficient holding force. Further, when the press-fitting depth 3aa at which the projecting portion 3b of the half-blanked dowel 3a is press-fitted into the small hole 2a of the first plate 2 (Wd) exceeds 0.8 of the inner wall length of the small hole 2a, the half-blanked dowel 3a is It is no longer held by the second plate member 3 (Wc) with a sufficient holding force.
The press-fitting depth 3aa at which the projecting portion 3b of the half-blanked dowel 3a is press-fitted into the small hole 2a of the first plate 2 (Wd) is preferably 0.4 to 0.6 of the inner wall length Wt of the small hole 2a. , more preferably 0.5.

[Laminate plate material structure separation process]
The laminated plate structure separation step 50 is a laminated structure Wf (laminated plate structure 1 ) from the tape-shaped plate W.
In the laminated plate material structure separation step 50, as shown in FIG. A step of descending toward the laminated plate structure separating lower mold 52, cutting the connection region Wi where the laminated structure Wf is connected to the tape-like plate material W, and separating the laminated structure Wf from the tape-like plate material W. is. The laminated structure Wf separated from the tape-shaped plate material W by this laminated plate structure separation step 50 is the laminated plate structure 1 of FIG.

[Effect of Embodiment 1]
The effects of the first embodiment are as follows.

(a) According to the first embodiment, the predetermined area forming step 10 for forming the predetermined area Wa in the tape-shaped plate material W, the small hole punching step 20 for punching the small holes 2a at predetermined locations in the predetermined area Wa, and the first plate material 2 After performing the second plate material stacking step 30 of stacking the second plate material 3 (Wc) on (Wd), the half-blanked dowel forming step 40 is performed. In this half-blanking dowel forming step 40, the half-blanking punch 41 is applied to the second plate 3 (Wc) at the surface position of the second plate 3 (Wc) corresponding to the position of the small hole 2a in the first plate 2 (Wd) in plan view. ) to form half-blanked dowels 3a in the second plate 3 (Wc). The tip of the half-blanked dowel 3a protrudes from the back surface 3e (Wj) of the second plate 3 (Wc), and the protruding portion 3b is press-fitted into the small hole 2a of the first plate 2 (Wd). By doing so, the first plate member 2 (Wd) and the second plate member 3 (Wc) are joined together. Therefore, the projecting portion 3b of the half-blanked dowel 3a can be reliably press-fitted into the small hole 2a of the first plate member 2 (Wd). Therefore, it is possible to stabilize the fixing force between the stacked plate materials.

(b) According to the first embodiment, even if the position of the small hole 2a of the first plate 2 (Wd) and the position of the half-blanking punch 41 are slightly deviated from each other, the half-blanking punch 41 can reliably press-fit the protruding portion 3b protruding from the back surface 3e (Wj) of the second plate member 3 (Wc) into the small hole 2a. Therefore, the fixing force between the stacked plate materials can be stabilized. Moreover, both plate materials are not distorted or deformed, and therefore internal stress is not accumulated, so that initial and long-term reliability can be ensured.

(c) In addition, in the conventional example, there is a step of forming recesses and projections in each of the plate members, and a fitting step of stacking the other plate member and fitting the protrusion of the other plate member into the recess of the other plate member. 2 processes are performed. On the other hand, in the first embodiment, the half-blanked dowel forming step 40 includes a step of projecting the half-blanked dowel 3a from the back surface 3e (Wj) of the second plate 3 (Wc) and the first plate 2 (Wd). and a step of fixing the second plate member 3 (Wc). Therefore, it is possible to shorten the manufacturing process and reduce the manufacturing cost.

(d) According to the first embodiment, in the small hole punching step 20, when the planar view diameter 21d of the tip of the small hole punch 21 is smaller than the plate thickness Wt of the first plate 2 (Wd), The inner wall of the small hole 2a punched by the punch 21 has a long smooth and hard sheared surface and a short rough and brittle fractured surface. Moreover, the sheared surface is formed on the inner wall of the small hole 2a on the surface side (the side on which the small hole punch 21 is inserted).
Therefore, in the half-blanking dowel forming step 40, when the half-blanking punch 41 is pressed into the surface 3c (We) of the second plate 3 (Wc), the first plate 2 (Wd) around the small hole 2a is The function of the die can be effectively exhibited. That is, since the surface side portion of the inner wall of the small hole 2a is smooth and the hard sheared surface is formed long, when the half-blanking punch 41 is press-fitted, the protruding portion 3b of the half-blanking dowel 3a is pushed around the small hole 2a. Even if the first plate member 2 (Wd) is strongly pressed, the first plate member 2 (Wd) is not crushed, and the projecting portion 3b of the half-blanked dowel 3a can be smoothly introduced into the small hole 2a. .

(e) According to the first embodiment, in the half-blanked dowel forming step 40, the press-fitting depth 3aa at which the projecting portion 3b of the half-blanked dowel 3a is press-fitted into the small hole 2a of the first plate 2 (Wd) It is in the range of 0.2 to 0.8 of the inner wall length of 2a (equivalent to the plate thickness Wt of the first plate member 2 (Wd)). Therefore, the half-blanked dowel 3a is held by the second plate 3 (Wc) with a sufficient holding force, and at the same time, the projecting portion 3b of the half-blanked dowel 3a holds the first plate 2 (Wd) by a sufficient holding force. becomes possible. Here, if the press-fitting depth 3aa is less than 0.2 of the inner wall length Wt of the small hole 2a, the fitting length between the protrusion 3b and the inner wall of the small hole 2a will be shortened, and the protrusion 3b will become the first plate member 2. (Wd) cannot be held with a sufficient holding force. If the press-fitting depth 3aa exceeds 0.8 of the inner wall length Wd of the small hole 2a, the half-blanked dowel 3a will not be held by the second plate member 3 (Wc) with sufficient holding force.

(f) According to the first embodiment, the plan view shape and plan view area of the tip of the half-punching punch 41 are the same as the plan view shape and plan view area of the small hole 2a punched in the first plate 2 (Wd). Since they are the same, only the portion of the second plate member 3 (Wc) that faces the small hole 2a of the first plate member 2 (Wd) can be pressed by the punch 41 for half-punching. Therefore, it is possible to smoothly project the projecting portion 3b of the half-blanking dowel 3a into the small hole 2a by pressing the half-blanking punch 41. As shown in FIG. Moreover, since the protruding portion 3b of the half-blanked dowel 3a has the same plane view shape and plane view area as the small hole 2a, it can be press-fitted into the small hole 2a without difficulty. The connection between the two plate members 3 (Wc) can be made stronger.

(g) According to Embodiment 1, the first plate member 2 (Wd) and the second plate member 3 (Wc) are connected (joined) at the 180° bending point on one side, and the half-blanked dowels 3a on the other side. are connected at points. Therefore, it is possible to strongly bond the two plate members together. Furthermore, since the two plate members are joined at the 180° bent portion and the half-blanked dowel 3a portion, it is possible to bring the two plate members into close contact with each other over a wide area.

(h) According to Embodiment 1, the first plate member 2 (Wd) is made of the tape-shaped member W, and as the tape-shaped member W is conveyed, the predetermined region forming step 10, the small hole punching step 20, and the second plate member are carried out. Since the stacking step 30, the half-blanked dowel forming step 40, and the laminated plate structure separating step 50 for separating the laminated plate structure 1 from the tape-like plate W are performed, each step can be performed continuously. Therefore, the laminated plate material structure 1 can be manufactured at low cost and with high quality.

(i) According to Embodiment 1, it is possible to obtain the laminated plate material structure 1 having the effects related to the laminated plate material structure 1 described in (a), (b), (d) to (g). .

[Embodiment 2]
The laminated plate material structure 1 obtained by the manufacturing method of Embodiment 1 is formed from a plate material in which the first plate material 2 and the second plate material 3 are integrated. The laminated plate material structure 101 obtained by the manufacturing method of the second embodiment differs from the first embodiment in that the first plate material 102 and the second plate material 103 are made of separate plate materials. Other than that, it is the same as the first embodiment.
Therefore, in the method for manufacturing the laminated plate material structure 101 of the second embodiment, the small hole punching step 120 is performed instead of the small hole punching step 20 of the first embodiment, and the second plate material laminating step 30 of the first embodiment is performed. Instead, a second plate stacking step 130 is adopted. A guide dowel formation step 122 is performed in the small hole punching step 120 of the second embodiment. In the second plate material stacking step 30 of the first embodiment, the right angle bending step 31, the 135° bending step 34, and the 180° bending step 36 are performed in this order. At 130, the respective folding steps are not performed.

4 is a cross-sectional view of a laminated plate material structure 101 obtained by the manufacturing method of Embodiment 2, FIG. 5 is a process diagram for explaining the method of manufacturing the laminated plate material structure 101 of Embodiment 2, and FIG. FIG. 4 is an explanatory diagram illustrating a method for manufacturing the laminated plate material structure 101; FIG. 6(1) is a plan view of the tape-shaped plate material W and the second plate material 103 corresponding to each step of the second embodiment, and FIG. 6(2) is a BB cross-sectional view of FIG. 6(1). 6(3) is a CC sectional view and a DD sectional view of FIG. 6(1). In addition, FIGS. 6(2) and 6(3) also show a processing device for processing a tape-shaped plate material.

As shown in FIG. 4, the laminated plate structure 101 obtained by the manufacturing method of Embodiment 2 of the present invention is obtained by laminating the second plate member 103 separately on the surface 102c of the first plate member 102, are connected to each other by a half-punched dowel 103a. At the half-blanked dowel 103a of the second plate member 103, the projecting portion 103b of the half-blanked dowel 103a formed on the second plate member 103 is press-fitted into a small hole 102a drilled at a predetermined location of the first plate member 102.
The laminated plate material structure 101 of Embodiment 2 is arranged on the bottom surface of the semiconductor module M and used as a heat sink for the semiconductor module M, as shown in FIG. Since the first plate material and the second plate material are laminated, the laminated plate material structure 101 of the second embodiment can be formed thickly, and the heat dissipation property of the semiconductor module M can be improved.

In the method of manufacturing the laminated plate material structure 101 of the second embodiment, the same tape-shaped plate material W as that of the first embodiment is used, and as shown in FIG. Step 130, half-blanked dowel forming step 140, and laminated plate material structure separating step 150 are performed in this order. In addition, in the small hole punching step 120, a guide dowel forming step 122 is performed.
The same metal as in the first embodiment is used for the tape-like plate material W used in the method for manufacturing the laminated plate material structure 101 of the second embodiment. The tape-shaped plate material W is intermittently transported along the transport direction P in FIG. 6(1), and each step is performed during each transport stop. Sprocket holes Wh for transport are formed at equal intervals along the transport direction P at both ends of the tape-shaped plate material W in the width direction.
Each step will be described in detail below.

[Predetermined Area Forming Step]
The predetermined region forming step 110 is a step of forming a predetermined region Wa for forming the laminated plate structure 101 in the tape-shaped plate material W, and is performed in the same manner as in the first embodiment. As shown in FIG. 6(1), the predetermined area Wa is a cantilever portion, and is formed by punching out a notch Wb having a U-shape in plan view in the tape-like plate material W. As shown in FIG. The notch portion Wb is formed by pressing the tape-shaped plate material W with an upper die 11 and a lower die 12, as shown in FIG. 6(2).

From the small hole punching step 120 to be described below to the laminated plate structure separation step 150 to be described later, the predetermined region Wa is formed in the laminated plate structure 101 separated from the tape-like plate W by the laminated plate structure separation step 150. becomes the first plate member 102 . For this reason, the predetermined area Wa will be referred to as the first plate member 102 (Wa) in the following description.

[Small hole drilling process]
The small hole punching step 120 is a step of punching small holes 102a at two locations (multiple locations) in the first plate member 102 (Wa) of the tape-shaped plate member W formed in the predetermined area forming step 110. similarly implemented. As shown in FIG. 6(2), the small hole 102a is formed by pressing the small hole punch 21 arranged on the upper side of the tape-shaped plate material W against the surface Wj of the tape-shaped plate material W, and forming the small hole 102a on the lower side of the tape-shaped plate material W. It is formed by dropping into a small hole die 22 in place.
A planar view diameter (outer diameter) 21d of the tip of the small hole punch 21 is smaller than the hole diameter 22d of the small hole die 22 by the clearance.

Further, the planar view diameter 21d of the tip of the small hole punch 21 is smaller than the plate thickness Wt of the tape-like plate material W, as in the first embodiment. The planar view diameter 21d of the tip of the small hole punch 21 may be the same as the thickness Wt of the tape-shaped plate material W, or may be larger than the thickness Wt of the tape-shaped plate material W.

Further, in the small hole drilling step 120, a guide dowel forming step 122 is also performed at the same time. In the small hole punching step 120, the small holes 102a are formed in the first plate member 102 (Wa), and at the same time, as shown in FIG. Two (plurality of) guide dowels 102d are formed to protrude. The guide dowel 102d determines the position of the second plate member 103 laminated on the first plate member 102 (Wa) in plan view.
As shown in FIG. 6C, the guide dowel 102d is formed by inserting the guide dowel punch 60 disposed below the tape-like plate W from the rear surface We of the tape-like plate W to about half the thickness of the tape-like plate W. It is formed by pushing up to the desired height. When the guide dowel 102d is formed in this manner, the projecting portion 102da of the guide dowel 102d protrudes from the surface 102c (Wj) of the first plate member 102 (Wa). After the projecting portion 102da is formed, the projecting portion 102da is inserted into the die hole 61 of the guide dowel die arranged on the upper side of the tape-shaped plate material W. As shown in FIG.

Note that the predetermined region forming step 110 and the small hole punching step 120 are not limited to the order described above, and may be reversed in order or performed simultaneously. Also in the small hole punching step 120, the step of forming the small holes 102a and the step of forming the guide dowels 102d may be performed as separate steps. Furthermore, the step of forming the guide dowels 102d may be performed before or at the same time as the predetermined area forming step 110. FIG.

[Second plate laminating step]
In the second plate material stacking step 130, a small hole 102a is bored in the small hole punching step 120, and the surface 102c (Wj) of the first plate material 102 (Wa) formed with the guide dowel 102d projecting from the surface is separately prepared. This is a step of laminating the second plate material 103 that has been formed.
A plurality of guide holes 103d are formed in the second plate member 103 in advance. When the second plate member 103 is stacked on the first plate member 102 (Wa), the guide holes 103d of the second plate member 103 are fitted into the guide dowels 102d of the first plate member 102 (Wa), and the positions of the two in plan view are aligned. is determined.

The second plate material 103 is made of the same metal as the tape-shaped plate material W that constitutes the first plate material 102 (Wa). Metals with high hardness are used. The second plate member 103 may be a different metal from the first plate member 102 (Wa).
Further, the hardness of the first plate member 102 (Wa) is the same as or higher than the hardness of the second plate member 103 . When the hardness of the first plate member 102 (Wa) is the same as or higher than the hardness of the second plate member 103, half-blanked dowels 103a are formed on the second plate member 103 in a half-blanked dowel forming step 140, which will be described later. , the first plate member 102 (Wa) is not crushed when the half-punching punch 41 presses the second plate member 103 . For this reason, the first plate member 102 (Wa) can sufficiently exhibit the function of the die of the press die, and the small hole 102a can sufficiently exhibit the function of the die hole, and the protruding portion 103b of the half-blanked dowel 103a can be replaced by the small hole 102a. can be securely pressed into the A specific example of a combination in which the hardness of the first plate material 102 (Wa) is higher than the hardness of the second plate material 103 is as follows: the first plate material is stainless steel (SUS304 or the like); The second plate is brass, the first plate is brass and the second plate is aluminum.
Note that the hardness of the first plate member 102 (Wa) may be lower than the hardness of the second plate member 103 as long as it is equal to or greater than a predetermined value.

Also, the plate thickness Wt of the first plate member 102 (Wa) is the same as the plate thickness Ws of the second plate member 103 or thicker than the plate thickness Ws of the second plate member 103 .
When the plate thickness Wt of the first plate member 102 (Wa) is the same as or thicker than the plate thickness Ws of the second plate member 103, in the half-blanked dowel forming step 140 described later, the second plate member 102 (Wa) When the half-punching dowel 103a is formed on the plate 103, the first plate 102 (Wa) is not crushed when the half-punching punch 41 presses the second plate 103. For this reason, the first plate member 102 (Wa) can sufficiently exhibit the function of the die of the press die, and the small hole 102a can sufficiently exhibit the function of the die hole, and the protruding portion 103b of the half-blanked dowel 103a can be replaced by the small hole 102a. can be press-fitted inside.
The plate thickness of the first plate member 102 (Wa) may be thinner than the plate thickness Ws of the second plate member 103 as long as the strength of the first plate member 102 (Wa) is equal to or greater than a predetermined value.

[Half punch dowel forming process]
In the half-blanked dowel forming step 140 for the second plate material 103, the half-blanked dowel 103a is formed in the second plate material 103 laminated on the surface 102c (Wj) of the first plate material 102 (Wa) in the second plate laminating step 130, This is a step of joining the first plate member 102 (Wa) and the second plate member 103 with the half-punched dowels 103a.
The half-blanked dowel forming step 140 differs from the half-blanked dowel forming step 40 of the first embodiment in that the second plate member 103 is used instead of the second plate member 3 (Wc). The rest is the same as the half-blanked dowel formation step 40 of the first embodiment.
In the half-blanking dowel forming step 140 of the second embodiment, since the second plate member 103 separate from the first plate member 102 (Wa) is used, the half-blanking punches 41, 41 are provided at two locations (a plurality of locations). Deploy. The half-blanking punches 41, 41 and the half-blanking dowels 103a, 103a are, as shown in FIG. is arranged at a planar view position different from the planar view position of .

In the half-blanked dowel forming step 140, the press-fitting depth 103aa (see FIG. 4) when the projecting portion 103b of the half-blanked dowel 103a is press-fitted into the small hole 102a of the first plate member 102 (Wa) is The inner wall length of 102a (the thickness Wt of the first plate member 2 (Wa), ie, the tape-shaped plate member W) is preferably in the range of 0.2 to 0.8. More preferably, it is 0.4 to 0.6 of the inner wall length Wt of the small hole 2a, and still more preferably 0.5.

[Laminate plate material structure separation process]
In the laminated plate structure separating step 150, the laminated structure Wg (the laminated plate structure 101 after separation) in which the first plate member 102 (Wa) and the second plate member 103 are joined to each other by the half-blanking dowel forming step 140 is separated. , is a step of separating from the tape-shaped plate material W. FIG.
In the laminated plate structure separation step 150, as shown in FIG. 6(2), the laminated plate structure separating upper die 51 arranged above the tape-shaped plate W is placed under the tape-shaped plate W. It descends toward the disposed laminated plate material structure separating lower die 52, cuts the connection region Wi where the laminated structure Wg is connected to the tape-like plate material W, and separates the laminated structure Wg from the tape-like plate material W. It is a process to do. The laminated structure Wg separated from the tape-like plate material W by this laminated plate structure separation step 150 is the laminated plate structure 101 in FIG.

[Effect of Embodiment 2]
Embodiment 2 has the effects (a) to (f), (h) and (li) of embodiment 1, and also has the following effects.

(J) According to the second embodiment, since the first plate member 102 (Wa) and the second plate member 103 are made of separate plate members, the material, plate thickness, hardness, and treatment state such as heat treatment of both plate members are determined. Any selection can be made according to the application. Furthermore, the third plate material is laminated on the second plate material 103, and the two plate materials are joined together with half-punched dowels by the manufacturing method of the second embodiment. It also becomes easy to bond the upper layer plate material to each other by the manufacturing method of the second embodiment.

(k) According to the second embodiment, when the hardness of the first plate member 102 (Wa) is the same as or higher than the hardness of the second plate member 103, in the half-blanked dowel forming step 140, When the half-punching punch 41 presses the second plate 103, the first plate 102 (Wa) is not crushed, and the first plate 102 (Wa) functions as a die of the press die. It becomes possible for the small holes 102a of the plate material 102 (Wa) to fully exhibit the function of the die holes. Therefore, the projecting portion 103b of the half-blanked dowel 103a can be reliably press-fitted into the small hole 102a.

(l) According to the second embodiment, when the plate thickness Wt of the first plate member 102 (Wa) is the same as or thicker than the plate thickness Ws of the second plate member 103, the half-blanking is performed. In the dowel forming step 140, when the half-punching punch 41 presses the second plate 103, the first plate 102 (Wa) is not crushed, and the first plate 102 (Wa) is pressed against the die of the press die. It is possible for the small holes 102a of the first plate member 102 (Wa) to fully exhibit the function of a die hole. Therefore, the projecting portion 103b of the half-blanked dowel 103a can be reliably press-fitted into the small hole 102a.

(i) According to the second embodiment, the laminated plate structure having the effects of the laminated plate structure 101 described in (a), (b), (d) to (g), and (j) to (wo). 101 can be obtained.

The present invention includes various modifications other than each embodiment as long as they do not contradict the gist of the present invention. For example, the following modifications are also included.

[Modification 1]
In the half-blanking dowel forming step 40 of each embodiment, the plan view shape and plan view area of the tip of the half-blanking punch 41 are the small holes 2a formed in the first plate members 2 (Wd) and 102 (Wa), It was the same as the planar view shape and planar view area of 102a.
In the half-blanking dowel forming step of Modification 1, the planar view area of the tip of the half-blanking punch press-fitted into the second plate material is arranged inside the planar view area of the small hole punched in the first plate material. It is different from each embodiment in that respect, and is otherwise the same as each embodiment.

FIG. 7 is an explanatory diagram for explaining the half-blanked dowel forming step 40 in the first modification. A half-blanking dowel forming step 40 is performed, and a half-blanking punch 41 is pressed into the surface 3c (We) of the second plate 3 (Wc). In FIG. 7, the half-blanking punch 41 and the small hole 2a of the first plate 2 (Wd) are perfectly circular in plan view, and the outer diameter 41d of the half-blanking punch 41 is smaller than the inner diameter 2ad of the small hole 2a. In addition, the plan view shape of the punch 41 for half-blanking and the small hole 2a may be any shape other than a perfect circle, and may be, for example, a polygonal shape or an elliptical shape. Regardless of the shape of the half-punching punch 41 and the small hole 2a in plan view, the area of the tip of the half-punching punch 41 press-fitted into the second plate 3 (Wc) is the first It is arranged inside the planar view area of the small hole 2a of the plate member 2 (Wd).

According to Modification 1, the planar view area of the tip of the half-punching punch 41 that is press-fitted into the surface 3c (We) of the second plate 3 (Wc) is a small hole drilled in the first plate 2 (Wd). It is arranged inside the planar view area of 2a. Therefore, the half-punching punch 41 can easily press-fit (extrude) the area of the second plate member 3 (Wc) corresponding to the inner side of the planar view area of the small hole 2a into the small hole 2a. Therefore, the protruding portion 3b of the half-blanked dowel 3a can be formed long in the plate thickness direction, and a long contact length between the protruding portion 3b and the inner wall (in the plate thickness direction) of the small hole 2a can be ensured. 2 (Wd) and the second plate member 3 (Wc) can be further enhanced.
The half-punched dowels 3a of Modification 1 are formed by pushing out the areas corresponding to the small holes 2a in the second plate 3 (Wc) with the half-punched punch 41. As shown in FIG. For this reason, the outer peripheral wall of the half-punched dowel 3a forms an extruded surface with almost no sheared surface or broken surface.

The half-blanked dowel forming step 40 in Modification 1 is performed when the half-blanked dowel forming step 40 is performed in a state in which the second plate 3 (Wc) is laminated on the first plate 2 (Wd) of the first embodiment. The present invention is not limited to this, but can be applied to the case where the half-blanked dowel forming step 140 is performed in a state in which the second plate member 103 is laminated on the first plate member 102 (Wa) of the second embodiment. have a similar effect.

[Modification 2]
In the half-blanking dowel forming steps 40 and 140 of each embodiment, the plan view shape and plan view area of the tip of the half-blanking punch 41 correspond to the small holes drilled in the first plate members 2 (Wd) and 102 (Wa). 2a and 102a in plan view and the same plan view area. In the half-blanking dowel forming step of Modification 1, the planar view region of the tip of the half-blanking punch 41 press-fitted into the second plate 3 (Wc) is the small hole 2a drilled in the first plate 2 (Wd). It was arranged inside the planar view area.
In the half-blanking dowel forming process of Modified Example 2, the planar view area of the tip of the half-blanking punch press-fitted into the second plate extends outside the planar view area of the small hole punched in the first plate. It is different from each embodiment and Modification 1 in one point, and is otherwise the same as each embodiment and Modification 1.

FIG. 8 is an explanatory diagram for explaining the half-blanked dowel forming step 40 in Modification 2. In a state in which the second plate 3 (Wc) is laminated on the first plate 2 (Wd) corresponding to Embodiment 1, A half-blanking dowel forming step 40 is performed, and a half-blanking punch 41 is pressed into the surface 3c (We) of the second plate 3 (Wc). In FIG. 8, the half-blanking punch 41 and the small hole 2a of the first plate 2 (Wd) are perfectly circular in plan view, and the outer diameter 41d of the half-blanking punch 41 is larger than the inner diameter 2ad of the small hole 2a. The shape of the half-blanking punch 41 and the small hole 2a in plan view may be any shape other than a perfect circle, such as a polygonal shape or an elliptical shape. Regardless of the shape of the half-punching punch 41 and the small hole 2a in plan view, the top end of the half-punching punch 41 press-fitted into the second plate 3 (Wc) (at least the part) is arranged outside the planar view area of the small hole 2a of the first plate member 2 (Wd).

According to Modification 2, the planar view area of the tip of the half-punching punch 41 that is press-fitted into the surface 3c (We) of the second plate 3 (Wc) is a small hole drilled in the first plate 2 (Wd). It exists up to the outside of the planar view area of 2a. Therefore, the half-punching punch 41 presses the area of the second plate 3 (Wc) corresponding to the outside of the area of the small hole 2a in plan view to forcibly form the projecting portion 3b. It is forced into (pushed out) into the small hole 2a. Therefore, it is possible to further increase the bonding strength between the first plate member 2 (Wd) and the second plate member 3 (Wc).
The half-punched dowels 3 a of Modification 2 are formed by pushing out the areas corresponding to the small holes 2 a in the second plate 3 (Wc) by the half-punched punch 41 . For this reason, the outer peripheral wall of the half-punched dowel 3a forms an extruded surface with almost no sheared surface or broken surface.

The half-blanked dowel forming step 40 in Modification 2 is performed when the half-blanked dowel forming step 40 is performed in a state in which the second plate 3 (Wc) is laminated on the first plate 2 (Wd) of the first embodiment. The present invention is not limited to this, but can be applied to the case where the half-blanked dowel forming step 140 is performed in a state in which the second plate member 103 is laminated on the first plate member 102 (Wa) of the second embodiment, and is similar to the modification 2 described above. have a similar effect.

[Modification 3]
FIG. 9 is an explanatory diagram for explaining the half-blanked dowel forming step 40 in Modification 3. As shown in FIG.
In the half-blanked dowel forming step 40 of Modification 3, half-blanking is performed on the back surfaces 2e and 102e (We) of the small holes 2a and 102a of the first plate members 2 (Wd) and 102 (Wa) of each embodiment and each modification. It differs from each embodiment and each modification in that the half-blanked dowels 3a and 103a are formed with the dowel receivers 70 inserted therein. Other points are the same as each embodiment and each modification.

As shown in FIG. 9, in the half-blanked dowel forming step 40 of Modified Example 3, a half-blanked dowel holder 70 is inserted into the small hole 2a from the back surface 2e (We) side of the first plate 2 (Wd), and then A half blanking punch 41 is pressed into the surface 3c (We) of the second plate 3 (Wc). Therefore, the half-blanking dowel 3a is compressed in the plate thickness direction m of the first plate 2 (Wd) by the half-blanking punch 41 and the half-blanking dowel receiver 70 . As a reaction to this compression, the half-blanked dowels 3a try to expand in the radial direction. 2. Formation of the half-blanked dowel 3a of the plate material 3 (Wc) increases the contact force with the inner wall. Therefore, the half-blanked dowels 3a strengthen the connection between the first plate member 2 (Wd) and the second plate member 3 (Wc).
The back surface 2e (We) of the first plate member 2 (Wd) is the opposite side of the front surface 2c (Wj) on which the second plate member 3 (Wc) is laminated in the first plate member 2 (Wd). point to the face

Further, when the half-blanking punch 41 is press-fitted into the surface 3c (We) of the second plate 3 (Wc), the half-blanking dowel holder 70 stops at a predetermined position in the small hole 2a and is half-blanked. The tip surface of the half-blanked dowel 3a may be received by the tip surface of the half-blanket dowel 3a. You may continue pressing to the (Wc) side (upper side of FIG. 9). When the formation of the half-blanking dowels 3a is completed (the half-blanking punch 41 stops press-fitting into the surface 3c (We) of the second plate 3 (Wc), and the half-blanking dowel receiver 70 stops pressing the upper side. state), the half-blanked dowel height l is smaller than the plate thickness Ws of the second plate 3 (Wc).

It should be noted that the half-blanked dowel support 70 is the back surface 2e ( It is inserted into the small hole 2a from the We) side, and in the second embodiment, it is inserted into the small hole 102a from the rear surface 102e (We) side of the first plate member 102 (Wa).

[Modification 4]
10A and 10B are explanatory diagrams for explaining the half-blanked dowel forming step 40 in Modification 4. FIG.
In the half-blanked dowel formation step 40 of Modification 4, the inner wall of the small hole 2a drilled in the first plate 2 (Wd) of Embodiment 1 is such that the back side hole width 2af of the small hole 2a is the front side hole width. It differs from Embodiment 1 and Modifications 1 to 3 in that it is formed in a state in which the reverse tapered surface 2f is formed to be larger than 2ae. Other points are the same as those of the first embodiment and the first to third modifications.

As shown in FIG. 10, the inner wall of the small hole 2a of the first plate 2 (Wd) is formed such that, in the small hole punching step 20, the rear surface side hole width 2af of the small hole 2a is larger than the front side hole width 2ae. It is formed on the reverse tapered surface 2f so as to be large. This reverse tapered surface 2f has a predetermined angle θ from the front surface 2c (Wj) of the first plate member 2 (Wd) toward the rear surface 2e (We).
The back surface 2e (We) of the first plate member 2 (Wd) is the opposite side of the front surface 2c (Wj) on which the second plate member 3 (Wc) is laminated in the first plate member 2 (Wd). point to the face
In addition, the reverse tapered surface 2f of the inner wall of the small hole 2a may be linear or stepped, and the small hole 2a is tapered from the front surface 2c (Wj) of the first plate member 2 (Wd) toward the rear surface 2e (We). Any surface shape may be used as long as the width dimension is formed large. Also, the reverse tapered surface 2f may be provided on the entire outer circumference of the small hole 2a, or may be provided on a part of the outer circumference of the small hole 2a. In FIG. 10, the outer diameter 41d of the half-blanking punch 41 is the same diameter as the surface-side hole width dimension 2ae of the small hole 2a.

In order to form the reverse tapered surface 2f from the front surface 2c (Wj) to the back surface 2e (We) of the first plate member 2 (Wd) on the inner wall of the small hole 2a of the first plate member 2 (Wd), first, the first embodiment is performed. Similarly, a small hole 2a is punched in the first plate member 2 (Wd) using a small hole punch 21 (see FIG. 3(2)). Next, a reverse tapered surface forming punch (not shown) having a tapered surface on the tip side surface is press-fitted into the small hole 2a from the back surface 2e (We) of the first plate 2 (Wd). A tapered surface on the tip side of the tapered surface forming punch presses against the inner wall of the small hole 2a to form a reverse tapered surface 2f on the inner wall of the small hole 2a.
The method of forming the reverse tapered surface 2f on the inner wall of the small hole 2a may be other than the method described above. For example, by inserting a drill for forming a reverse tapered surface from the back side of the first plate, irradiating a laser beam from the back side of the first plate, or exposing the corrosive liquid from the back side of the first plate, A reverse tapered surface may be formed on the inner wall of the small hole.

According to Modified Example 4, in the half-blanking dowel forming step 40, when the half-blanking punch 41 presses the surface 3c (We) of the second plate 3 (Wc), the half-blanking dowel 3a is formed, and the projecting portion 3b thereof is formed. protrudes into the small hole 2a. The protruding portion 3b protrudes into the small hole 2a while being pressed and compressed by the half-punching punch 41, and thus expands along the reverse tapered surface 2f of the inner wall of the small hole 2a. Therefore, the projecting portion 3b is locked to the reverse tapered surface 2f of the small hole 2a and is securely held. Therefore, the second plate member 3 (Wc) is strongly bonded to the first plate member 2 (Wd).

In the half-blanked dowel forming step 40 in Modification 4, the half-blanked dowels are formed in a state in which the second plate 3 (Wc) is laminated on the first plate 2 (Wd) of Embodiment 1 and Modifications 1 to 3. It is not limited to the case where the formation step 40 is performed, but can be applied to the case where the half-blanked dowel formation step 140 is performed in a state in which the second plate member 103 is laminated on the first plate member 102 (Wa) of the second embodiment. There is, and it has the same effect as modification 4 mentioned above.
Further, the half-blanked dowel forming step 40 in Modified Example 4 may be used together with the half-blanked dowel forming step 40 in Modified Example 3. Specifically, in the half-blanked dowel forming step 40, as shown in FIG. After the top surface of the blanking dowel holder 70 is placed at a predetermined position slightly above the bottom surface of the half blanking dowel 3a in FIG. is press-fitted into the surface 3c (We) of the . In this case, the effects of Modification 3 and Modification 4 are obtained.

[Modification 5]
11A and 11B are explanatory diagrams for explaining the half-blanked dowel forming step 40 in Modification 5. FIG.
In the half-blanked dowel forming step 40 of Embodiment 1, the half-blanked dowel step 40 is performed in a state in which the second plate member 3 (Wc) is laminated on the first plate member 2 (Wd).
In the half-blanked dowel forming step of Modification 5, after performing the half-blanked dowel step 40 of Embodiment 1, the tip of the second plate 3 (Wc) is bent 180°, and the bent portion, the third plate 4 ( Wc) is laminated on the surface of the second plate member 3 (Wc), and the second half-blanking dowel forming step 42 is performed on the third plate member 4 (Wc).

FIG. 11 shows a state in which the first plate member 2 (Wd) and the second plate member 3 (Wc) are joined together by the half-blanked dowels 3a formed by the half-blanked dowel forming step 40 of the first embodiment. It is
In the second half-blanking dowel forming step 42, a half-blanking punch 41 is applied at a surface position of the third plate 4 (Wc) corresponding to a position in plan view where the small hole 3f is previously bored in the second plate 3 (Wc). A half-blanked dowel 4a is formed by press-fitting into the surface 4c (Wc) of the third plate 4 (Wc), and the protruding portion 4b of the half-blanked dowel 4a protruding from the back surface of the third plate 4 (Wc) is attached to the second plate. The second plate member 3 (Wc) and the third plate member 4 (Wc) are joined together by press-fitting into the small hole 3f of 3 (Wc).

The timing for drilling the small holes 3f in advance in the second plate member 3 (Wc) is the small hole punching step 20 of the first embodiment, but if it is possible to punch, the timing other than the small hole punching step 20 can be used. good.
Further, the positions of the small hole 3f of the second plate member 3 (Wc) and the half-blanked dowel 4a of the third plate member 4 (Wc) in a plan view are the same as the small hole 2a of the first plate member 2 (Wd) and the second plate member 3 (Wc) ) is set at a position different from the plan view position of the half-blanked dowel 3a.

In Modification 5, the second plate 3 (Wc) corresponds to the first plate 2 (Wd) of Embodiment 1, and the third plate 4 (Wc) corresponds to the second plate 3 (Wc) of Embodiment 1. Since it corresponds, it can be considered that the half-blanked dowel forming step 40 of Embodiment 1 is performed twice. Alternatively, a fourth plate member may be laminated on the surface side of the third plate member 4 (Wc), and the fourth plate member may be subjected to the third half-blanking dowel forming process. The steps may be repeated.

According to Modification 5, the number of laminated plate members can be increased, and the thickness of the laminated plate member structure 401 can be increased. Therefore, for example, when the laminated plate material structure is used for the heat sink of the semiconductor module M, the heat dissipation performance can be further improved.
Also, even if the third and subsequent plate members are stacked one after another, since the plate members are integrated by the bent portions, there is no need to remarkably increase the binding force between the plate members by the half-blanked dowels. Therefore, it is possible to reduce the number of locations where the half-blanked dowels are formed, and to manufacture the laminated plate material structure at low cost.

[Modification 6]
12A and 12B are explanatory diagrams for explaining the half-blanked dowel forming step 40 in Modification 6. FIG.
In the half-blanked dowel forming step 40 of the second embodiment, the half-blanked dowel step 40 is performed while the second plate member 103 is laminated on the first plate member 102 (Wa).
In the half-blanked dowel forming step of Modification Example 6, after performing the half-blanked dowel step 40 of Embodiment 2, the third plate member 104 is laminated on the surface of the second plate member 103, and the third plate member 104 is subjected to the second half-blanking. A dowel forming step 42 is performed.

FIG. 12 shows a state in which the first plate member 102 (Wa) and the second plate member 103 are joined together by the half-blanked dowels 103a formed by the half-blanked dowel forming step 40 of the second embodiment. .
In the second half-blanking dowel forming step 42, the half-blanking punch 41 is applied to the surface of the third plate member 104 at a surface position corresponding to the position of the small hole 103f pre-drilled in the second plate member 103 in plan view. 104c to form a half-blanked dowel 104a, and the projecting portion 104b of the half-blanked dowel 104a protruding from the back surface of the third plate member 104 is press-fitted into the small hole 103f of the second plate member 103, and the second plate member 103 and the second plate member 103 are formed. The third plate members 104 are combined with each other.

The timing for drilling the small holes 103f in advance in the second plate member 103 is the small hole punching step 20 of the second embodiment, but the timing other than the small hole punching step 20 may be used as long as it is possible to punch holes.
Further, the planar view positions of the small hole 103f of the second plate member 103 and the half-blanked dowel 104a of the third plate member 104 are A position is a different position.
Alignment of the planar view positions of the first plate member 102 (Wa) and the second plate member 103 is performed by inserting the guide dowels 102d formed in the first plate member 102 (Wa) into the guide holes 103d of the second plate member 103 as in the second embodiment. (See FIG. 3 (3).). Alignment of the planar view positions of the second plate member 103 and the third plate member 104 is performed by inserting guide dowels previously formed in the second plate member 103 into guide holes previously drilled in the third plate member 104 (not shown). figure.). It should be noted that the alignment of the plan view positions of the respective plate members may be performed by other alignment structures. For example, guide holes formed in the respective plate members may be inserted into guide pins installed on the base. .

In Modified Example 6, the second plate member 103 corresponds to the first plate member 102 (Wa) of the second embodiment, and the third plate member 104 corresponds to the second plate member 103 of the second embodiment. It can be considered that the half-blanked dowel forming step 140 has been performed twice. Alternatively, the fourth plate member may be laminated on the surface side of the third plate member 104, and the third half-blanked dowel forming step may be performed on the fourth plate member, and similarly, the fourth and subsequent half-blanked dowel forming steps are repeated. may
The plate thickness Wt of the first plate member 102 (Wa) is thicker than the plate thickness Ws of the second plate member 103 , and the plate thickness Ws of the second plate member 103 is thicker than the plate thickness Wu of the third plate member 104 . However, the plate thickness of each plate is not determined by the relationship, and may be appropriately selected as necessary, for example, the same plate thickness may be used.

According to Modification 6, the number of laminated plate members can be increased, and the thickness of the laminated plate member structure 501 can be increased. Therefore, for example, when the laminated plate material structure is used for the heat sink of the semiconductor module M, the heat dissipation performance can be further improved. Moreover, it is also possible to adjust the plan view shape of each plate material and apply it to laminated electromagnetic cores such as motors and generators.
It is also possible to appropriately change the plate thickness and material of each plate according to the purpose of use.

[Other Modifications]
The present invention also includes the following modifications.

(1) In the first embodiment, the tape-shaped plate W is used to form the first plate 2 (Wd) and the second plate 3 (Wc) (the second plate 3 (Wc) is formed by bending the predetermined region Wa of the tape-shaped plate W). )), and while intermittently conveying the tape-shaped plate material W, the predetermined area forming step 10, the small hole punching step 20, the second plate material stacking step 30 (right angle bending step 31, 135° bending step 34 and 180° (including the bending step 36), the half-blanking dowel forming step 40, and the laminated plate material structure separating step 50 were performed continuously.
In this modification, a strip-shaped plate material is used instead of the tape-shaped plate material W, the strip-shaped plate material is mounted on an intermittent conveying device, and a predetermined area forming step 10, a small hole punching step 20, and a second plate material stacking step 30 ( (including right angle bending step 31, 135° bending step 34, and 180° bending step 36), half-blanking dowel forming step 40, and laminated plate material structure separating step 50 may be performed continuously.

Further, as described above, the first plate member 2 (Wd) and the second plate member 3 (Wc) are formed using strip-shaped plate members, but each of the above steps is performed independently (without being mounted on a conveying device). may In this case, by appropriately setting the plan view shape of the strip-shaped plate material, the laminated plate material structure separation step 50 of the first embodiment may be required, or the laminated plate structure separation step 50 may be omitted.

In addition, when each of the above steps is performed independently (without being mounted on a conveying device), the small hole punch 21 for punching small holes in the first plate material in the small hole punching step is replaced in the half-blanking dowel forming step. The half-punching punch 41 may also be used.

(2) In the second embodiment, the guide dowel forming step 122 is performed in the small hole punching step 120, and the second plate material 103 is laminated on the first plate material 102 (Wa) in the second plate material laminating step 130. , the guide dowel 102d of the first plate member 102 (Wa) is inserted into the guide hole 103d of the second plate member 103 to determine the plan view positions of both plate members. However, the planar view positions of both plate members may be determined using other structures. For example, in the small hole punching step 120, the first plate member 102 (Wa) is punched with the small hole 102a, and the guide dowel forming step 122 is not performed, and the guide hole is formed in the first plate member 102 (Wa) at a predetermined location (for example, Two positions of the guide dowel 102d in FIG. 6(1) in plan view) are bored. In the second plate material stacking step 130, guide pins are moved from the lower side of the first plate material 102 (Wa), and the guide pins protruding through the guide holes of the first plate material 102 (Wa) are stacked on the second plate material. It is inserted into the pre-drilled guide hole 103 . In this way, the planar view positions of both plate members are determined.

(3) In the second embodiment, the tape-shaped plate W is used to form the first plate 102 (Wa). The second plate material stacking step 130 (the second plate material 103 is prepared separately without being formed from the tape-shaped plate material W), the half-blanked dowel forming step 140, and the laminated plate material structure separating step 150 are continuously performed. Met.
In this modification, instead of the tape-shaped plate W, a strip-shaped plate is used to form the first plate 102 (Wa), and the strip-shaped plate is mounted on an intermittent conveying device. The punching step 120, the second plate material stacking step 130 (the second plate material 103 is not formed from strip-shaped plate material but prepared separately), the half punching dowel forming step 140, and the laminated plate material structure separating step 150 are continuously performed. You may make it go to

Further, as described above, the first plate member 102 (Wa) and the second plate member 103 are formed using strip-shaped plate members, but each of the above steps may be performed independently (without being mounted on a conveying device). . In this case, the laminated plate material structure separation step 150 of the second embodiment may be required or the laminated plate structure separation step 150 may be omitted by appropriately setting the plan view shape of the strip-shaped plate material.

In addition, when each of the above steps is performed independently (without being mounted on a conveying device), the small hole punch 21 for punching small holes in the first plate material in the small hole punching step is replaced in the half-blanking dowel forming step. The half-punching punch 41 may also be used.

(4) In each embodiment and each modified example, in the small hole punching steps 20 and 120, the small holes 2a and 102a were punched in the first plate members 2 (Wd) and 102 (Wa) using the small hole punch 21. However, other methods may be used to perforate the stoma. For example, small holes may be drilled in the first plate by drilling, laser light, or chemical dissolution.

(5) In each of the embodiments and modifications, half-blanking dowel forming steps 40 and 140 use a half-blanking punch 41 to form half-blanking dowels 3a and 103a on the second plate 3 (Wc) and 103. However, the half-punched dowels may be formed in the second plate material by other methods. For example, a half-blanked dowel is formed in the second plate by injecting a compressed fluid from a pipe having an inner diameter (size in plan view) equivalent to the diameter (size in plan view) of the half-blanked dowel onto the surface of the second plate. may Alternatively, a pipe having an inner diameter (planar view size) equivalent to the diameter of the half-punched dowel (planar view size) is pressed against the vicinity of the small hole on the back surface of the first plate, and the pipe is used to evacuate. , a half-blanked dowel may be formed on the second plate. In the above case, the compressed fluid passage and the vacuum passage in both pipes serve as the half-blanking punch of the present invention.

(6) In each of the embodiments and modifications, the first plate was not subjected to hardening treatment. The present invention is not limited to this, and a hardening treatment may be applied to the first plate in which the small holes are to be drilled. As the hardening treatment, the first plate material may be hardened by heat treatment. Further, the hardening treatment may be performed by pressing the first plate around the small hole in the plate thickness direction to compress it in the plate thickness direction and work harden it. By hardening the first plate material around the small hole, the first plate material can fully function as a die when forming the half-blanked dowels, and the half-blanked dowels can be formed satisfactorily.

(7) Modifications other than the above are also included in the present invention as long as they do not change the gist of the present invention.

Reference Signs List 1, 101, 401, 501 Laminated plate structure 2, 102 First plate 2a, 102a Small hole (of first plate) 2f Reverse tapered surface
3, 103 Second plate 3a, 103a Half-blanked dowel (of second plate) 3b, 103b Protruding portion (half-blanked dowel) 3f, 103f (Second plate) Small holes 4, 104 Third plate 4a, 104a Half-blanked dowels (of third plate) 4b, 104b Protruding portions (half-blanked dowels) 10, 110 Predetermined region forming process 20, 120 Small hole punching step 21 Punch for small hole 30, 130 Second plate material stacking step 31 Right angle bending step 34 135° bending step 36. 180° bending steps 40, 140 Half-blanking dowel forming step 41 Half-blanking punch 42 Second half-blanking dowel forming step 50, 150 Laminated plate material laminate separating step 70 ... Half-blanked dowel receiving 122 ... Guide dowel forming process 1000 ... Laminated core (laminated plate material structure)
1010... Core piece (plate material)
1010a Back surface of core piece 1010b Front surface of core piece 1010c Concave portion of core piece 1010d Convex portion of core piece 1010e Opening of core piece M Semiconductor module P Conveyance direction W Tape-shaped plate material Wa Predetermined region Wb Notch portion Wc Tip region Wd (of tape-shaped plate material)・Flat area (of tape-like plate) We... Back surface (of tape-like plate) Wf, Wg... Laminated structure Wh... Sprocket hole (of tape-like plate) Wi... (of tape-like plate) ) Connection area Wj (of tape-shaped plate) Surface (of tape-shaped plate) Wt (of tape-shaped plate) Thickness

Claims (10)

A method for manufacturing a laminated plate structure in which a second plate is laminated on a first plate and bonded to each other,
a small hole drilling step of drilling a small hole at a predetermined location of the first plate;
a guide dowel forming step of pushing up a guide dowel punch from the back surface of the first plate member to form a guide dowel projecting upward from the front surface of the first plate member by half-blanking;
In a step subsequent to the small hole drilling step and the guide dowel forming step, the guide dowel of the first plate member is fitted with a guide hole previously formed in the second plate member to determine the position of the two in plan view. a second plate laminating step of laminating the second plate on the first plate so that the
In a step after the step of stacking the second plate material, a half-blanking punch is applied from above to the surface of the second plate material at a surface position of the second plate material corresponding to the position of the small hole in the first plate material in plan view. a half-blanked dowel forming step of forming a half-blanked dowel in the second plate member by press-fitting into the second plate;
including
In the half-blanked dowel forming step, the tip of the half-blanked dowel is protruded from the back surface of the second plate member, and the projecting portion, which is the protruded portion, is press-fitted into the small hole of the first plate member. A method for manufacturing a laminated plate material structure, comprising joining a first plate member and the second plate member. A method for manufacturing a laminated plate material structure according to claim 1,
In the small hole drilling step,
Manufacture of a laminated plate material structure, wherein the small holes are punched using a small hole punch and a die, and the diameter of the tip of the small hole punch in plan view is smaller than the plate thickness of the first plate material. Method. A method for manufacturing a laminated plate material structure according to claim 1 or 2,
In the half-blanked dowel forming step,
The press-fitting depth of the protruding portion of the half-blanked dowel into the small hole of the first plate is in the range of 0.2 to 0.8 of the inner wall length of the small hole. A method for manufacturing a laminated plate material structure. A method for manufacturing a laminated plate material structure according to any one of claims 1 to 3,
In the half-blanked dowel forming step,
A laminated plate material structure, wherein a plan view shape and a plan view area of a tip end of the half-punching punch are the same as a plan view shape and a plan view area of the small hole punched in the first plate material. Production method. A method for manufacturing a laminated plate structure according to any one of claims 1 to 4,
In the half-blanking dowel forming step, a half-blanking dowel holder is inserted into the small hole from the back side of the first plate, and then the half-blanking punch is press-fitted into the surface of the second plate. 1. A method for manufacturing a laminated plate material structure, characterized by forming a half-punched dowel that is compressed in the plate thickness direction of the first plate material. A method for manufacturing a laminated plate material structure according to any one of claims 1 to 5,
In the half-blanked dowel forming step, the inner wall of the small hole drilled in the first plate member is formed to have a reverse tapered surface such that the width of the small hole on the back side is larger than the width of the hole on the front side. A method for manufacturing a laminated plate material structure, characterized in that it is carried out in a state where A method for manufacturing a laminated plate material structure according to any one of claims 1 to 6,
A method for manufacturing a laminated plate material structure, wherein the first plate material and the second plate material are composed of separate plate materials. A method for manufacturing a laminated plate material structure according to claim 7 ,
A method for manufacturing a laminated plate material structure, wherein the hardness of the first plate material is the same as or higher than the hardness of the second plate material. A method for manufacturing a laminated plate material structure according to claim 7 or 8 ,
A method for manufacturing a laminated plate material structure, wherein the plate thickness of the first plate material is the same as or thicker than the plate thickness of the second plate material. A method for manufacturing a laminated plate material structure according to any one of claims 1 to 9 ,
The first plate material is a tape-like plate material, and as the tape-like plate material is conveyed, the step of punching small holes, the step of forming guide dowels, the step of laminating the second plate material, and the step of forming half-punched dowels are performed, and 1. A method for producing a laminated plate material structure, characterized by performing a laminated plate material structure separation step of separating the laminated plate material structure from the tape-shaped plate material.

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