JP2005059046A - Method and device for manufacturing work having cylindrical collar part and flange part - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for easily manufacturing a work having a cylindrical collar part and a flange part and suppressing an increase of the manufacturing cost. <P>SOLUTION: In a trimming step, a developed part 26 to constitute a cylindrical collar part 11 is continuously integrated with a body part 21 in one blank 20. In a curling step before forming a flange part 12, the developed part is bent by a press to form the cylindrical collar part. In a flanging step, flanging by the press is performed on the outer circumferential edge of the body part to form the flange part while the cylindrical collar part is held at the offset position not interfered with the locus when the edge 12a of the flange part is folded. In a joining step, the edge of the flange part is joined to the outer circumferential surface of the cylindrical collar part while the cylindrical collar part is held at a normal position to be joined to the edge of the flange part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method for manufacturing a workpiece including a cylindrical collar portion and a flange portion, and a manufacturing apparatus therefor.

  In automobile parts, as a work comprising a cylindrical collar part for attaching other members and a bent flange part, and joining the edge of the flange part to the outer peripheral surface of the cylindrical collar part, For example, there is a transverse link in an automobile suspension.

  The transverse link includes a cylindrical collar portion for attaching the bush, and an arm main body in which a flange portion is formed by bending an outer peripheral edge. In the conventional transverse link, the cylindrical collar portion and the arm main body are separately formed, and the edge of the flange portion is welded to the outer peripheral surface of the cylindrical collar portion (for example, Patent Documents). 1, see Patent Document 2.). The cylindrical collar portion is formed by machining a cold extruded material or by bending a plate material with a press.

However, since the cylindrical collar portion and the arm main body are divided, when welding them together, each of the two separate parts is supplied, or the relative positions of the two are determined during assembly. There is a problem that the manufacturing process is complicated and the processing fee is expensive.
Japanese Patent Laid-Open No. 5-112111 JP-A-9-57380 (FIG. 10)

  The present invention has been made in order to solve the problems associated with the above-described prior art, and can easily manufacture a workpiece including a cylindrical collar portion and a flange portion, thereby suppressing an increase in processing cost. It aims at providing the manufacturing method of a workpiece | work provided with a collar part and a flange part, and its manufacturing apparatus.

  The present invention for achieving the above object is achieved by the following means.

The present invention includes a cylindrical collar portion for attaching another member and a bent flange portion, and a workpiece formed by joining an edge of the flange portion to an outer peripheral surface of the cylindrical collar portion. In the manufacturing method,
Trim process for continuously forming the development part that constitutes the cylindrical collar part continuously with the main body part in one blank material in order to form the cylindrical collar part by bending with a press When,
Before forming the flange portion, a curling step of forming the cylindrical collar portion by bending the unfolded portion to the unfolded portion;
With the cylindrical collar portion held at an offset position that does not interfere with the locus when the edge of the flange portion is bent, flange processing is performed on the outer peripheral edge of the main body portion to form the flange portion. Flange process to perform,
A joining step of joining the edge of the flange portion to the outer peripheral surface of the tubular collar portion in a state where the tubular collar portion is held at a normal position to be joined to the edge of the flange portion; Including,
It is a manufacturing method of a work provided with a cylindrical collar part and a flange part, wherein the cylindrical collar part and the flange part were formed integrally from the one blank material.

Moreover, this invention is provided with the cylindrical collar part for attaching another member, and the bent flange part, and joins the edge of the said flange part with the outer peripheral surface of the said cylindrical collar part. In equipment for manufacturing workpieces,
In order to form a cylindrical collar portion by bending with a press, a trim unit that continuously and integrally forms a development portion constituting the cylindrical collar portion on a main body portion of one blank material. When,
Before forming the flange portion, a curling unit that forms a cylindrical collar portion by bending the unfolded portion with a press to the unfolded portion;
With the cylindrical collar portion held at an offset position that does not interfere with the locus when the edge of the flange portion is bent, flange processing is performed on the outer peripheral edge of the main body portion to form the flange portion. Flange unit to
A joining unit that joins the edge of the flange portion to the outer peripheral surface of the tubular collar portion in a state where the tubular collar portion is held at a normal position to be joined to the edge of the flange portion; , A workpiece manufacturing apparatus including a cylindrical collar portion and a flange portion.

  According to the present invention, it is possible to easily manufacture a workpiece including a cylindrical collar portion and a flange portion, thereby suppressing an increase in processing cost.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view showing a transverse link 10 in a suspension for an automobile as an example of a workpiece W that is manufactured by applying the present invention and includes a cylindrical collar portion 11 and a flange portion 12, and FIGS. (C) is the perspective view, the top view, and bottom view which show the vicinity of the cylindrical collar part 11 of the transverse link 10 shown by FIG. 3-6 is a figure which shows the process of the manufacturing method of the transverse link 10 which concerns on embodiment of this invention, FIG.3 (A)-(C) is the blank material 20, a draw coin process, and FIGS. 4A, 4B, 5A, and 5B show the 1st curling process, the 2nd curling process, the 3rd curling process, and the 4th curling process, and FIG. 6A and FIG. These show the flange process and the restric process. 7A to 7D are schematic cross-sectional views illustrating the first to fourth th curling steps. 8A is a side view showing a state in which the cylindrical collar portion 11 is held at the offset position in the flange process, and FIG. 8B is a side view showing a main part of the transverse link 10 after the flange process is completed. FIG. 8C is a side view showing a state in which the cylindrical collar portion 11 is rewritten to a normal position in the restructuring process. FIG. 9A is a side view showing a state in which the cylindrical collar portion 11 is held in the normal position in the joining process, and FIG. 9B is a side view showing the main part of the transverse link 10 after the joining process. It is.

  An example of a workpiece that includes a cylindrical collar portion and a flange portion and joins the edge of the flange portion to the outer peripheral surface of the cylindrical collar portion is a transverse link in an automobile suspension. As shown in FIGS. 1 and 2, a transverse link 10 as a work W has a cylindrical collar portion 11 for attaching a bush, and an arm main body 13 in which a flange portion 12 is formed by bending an outer peripheral edge. doing. In the transverse link 10 of the present embodiment, the cylindrical collar portion 11 and the flange portion 12 are integrally formed from one blank material 20 (see FIG. 3A). The flange portion 12 is formed by bending by pressing, and the flange portion 12 is formed by flange processing by pressing.

  The transverse link 10 is manufactured by the following procedure.

  As shown in FIG. 3A, the flat one blank member 20 has a shape substantially equal to the shape of the developed transverse link 10. The blank material 20 includes a main body 21 that constitutes the upper surface of the component, and a tongue 22 that extends outward from the main body 21. The tongue portion 22 is curled after trimming and constitutes the cylindrical collar portion 11. The outer peripheral edge of the main body portion 21 is bent after the formation of the cylindrical collar portion 11 to constitute the flange portion 12.

  Next, as shown in FIG. 3B, a draw coin process is performed on the blank material 20. By a press (not shown), the main body portion 21 of the blank member 20 is formed into the upper surface shape of the component, and the chamfered coin 23 is formed while the tongue portion 22 is flat. A bent portion 24 serving as a starting end of the cylindrical collar portion 11 is also formed at the base portion of the tongue portion 22 continuous with the main body portion 21. The chamfered coin 23 is provided in order to improve the insertability of the bush into the cylindrical collar portion 11. Since the chamfered coin 23 is previously formed in a flat state before curling, machining for chamfering the opening end portion of the cylindrical collar portion 11 after curling becomes unnecessary. Note that a line segment 25 shown in the partially enlarged view indicates a trim line.

  Next, as shown in FIG. 3C, a trimming process is performed. In this trimming process, in order to form the cylindrical collar portion 11 by bending with a press by a trim unit, the development portion 26 constituting the cylindrical collar portion 11 is replaced with the main body in one blank material 20. It is formed integrally with the portion 21 continuously. The trim unit includes a press die, a cutting blade, and the like. With the trim unit, the outer peripheral edge of the tongue portion 22 is punched to form the development portion 26. Reference numeral 27 denotes a scrap cut from the tongue 22. By trimming the tongue portion 22 along the trim line 25 (see a partially enlarged view of FIG. 3B), chamfered portions 28 are formed at both ends in the width direction of the developing portion 26. The length in the width direction of the development portion 26 is equal to the length in the axial direction of the cylindrical collar portion 11, and the length in the longitudinal direction of the development portion 26 is the length in the circumferential direction of the cylindrical collar portion 11. equal.

  As shown in the partially enlarged view of FIG. 3C, the main body portion 21 and the deployment portion 26 are continuous through the bridge portion 30 and are integrally formed. The bridge part 30 has a width dimension shorter than the width dimension of the development part 26 due to the notch parts 31 formed from both sides of the development part 26 in the width direction. Reference numeral 32 in the drawing indicates a base edge of the development portion 26. In the joining step described later, the distal end edge 33 of the development part 26 is abutted against and joined to the proximal end edge 32.

  Next, as shown in FIGS. 4 and 5, a curling process is performed. In this curling process, before the flange portion 12 is formed by the curling unit, the unfolded portion 26 is subjected to bending by pressing to form the cylindrical collar portion 11. The curling unit includes a die, a punch, a pad, a movable die, a press die having a cam for driving the movable punch, and the like. The curling process of the present embodiment includes a 1st curling process (FIGS. 4A and 7A), a 2nd curling process (FIGS. 4B and 7B), and a 3rd curling process (FIG. 5A). ), FIG. 7 (C)) and the 4th curling step (FIG. 5 (B), FIG. 7 (D)).

  If the curling process is performed after the outer peripheral edge of the main body portion 21 is bent to form the flange portion 12, the mold for forming the cylindrical collar portion 11 interferes with the flange portion 12, and the cylindrical collar portion 11. The formation of can not be established. On the other hand, in this embodiment, since the bending process is performed on the development part 26 in a flat state before the outer peripheral edge of the main body part 21 is bent, the degree of freedom in designing the mold structure is large, and the cylindrical collar part 11 can be easily formed.

  Referring to FIGS. 4A and 7A, in the first curling process, the die 41 and the punch 42 are used to perform a bending process by a press on the tip portion of the development portion 26. The die 41 and the punch 42 are formed with a convex portion 41 a and a concave portion 42 a having a shape that matches the shape of the bent portion 24.

  Referring to FIGS. 4B and 7B, in the 2nd curling process, the developing part 26 is further subjected to bending by a press using a die 43 and a punch 44. The punch 44 is moved by a cam along a direction indicated by an arrow. The movable amount of the punch 44 is equal to or more than the inverse.

  With reference to FIGS. 5A and 7C, in the 3rd curling step, bending processing by press is further performed on the developing portion 26 by the die 45 and the punch 46. The punch 46 is moved by a cam along the direction indicated by the arrow. The movable amount of the punch 46 is equal to or more than the inverse amount. Although not shown in the drawing, the periphery of the bent portion 24 is pressed against the punch 46 by a pad to suppress floating during curling.

  Referring to FIGS. 5B and 7D, in the 4th curling step, the unfolded portion 26 is further bent by a press using a die 47 and a cylindrical punch 48, and the unfolded section 26 is orthogonal to the axis. Is formed into a perfect circle. The die 47 and the punch 48 are moved by a cam along a direction indicated by an arrow. The periphery of the bent portion 24 is pressed by a pad 49 to suppress the floating during curling.

  Next, as shown in FIGS. 6A and 8A and 8B, a flange process is performed. In this flange step, the flange 51 is pressed by the die 51 and the punch 52 while the cylindrical collar portion 11 is held by the flange unit at an offset position that does not interfere with the locus when the end edge 12a of the flange portion 12 is bent. Processing is performed on the outer peripheral edge of the main body portion 21 to form the flange portion 12. The flange unit is configured by a press die including a die 51 and a punch 52. The die 51 is formed with a recess 53 into which a portion from the bridge portion 30 to the main body portion 21 is fitted. The punch 52 is formed with a holding recess 54 for holding the cylindrical collar portion 11 at the offset position. The holding recess 54 has a substantially semicircular arc shape that matches the outer diameter shape of the cylindrical collar portion 11.

  Since the flange portion 12 is formed with the cylindrical collar portion 11 held at the offset position, the flange portion 12 can be bent while preventing interference between the cylindrical collar portion 11 and the edge 12a of the flange portion 12. .

  If the end portion of the flange portion 12 indicated by reference numeral 12b in FIG. 8B is overhanging from the die 51, the end portion 12b may be scratched by the edge 51a of the die 51 or may be bent. There is a risk that. By holding the cylindrical collar portion 11 at the offset position, the shape of the die 51 can be easily set to a shape in which the end portion 12b does not overhang. A line segment 55 shown in FIGS. 8A and 8B shows the locus of the edge 51 a of the die 51. The die 51 has a shape that does not interfere with the cylindrical collar portion 11 and that the end portion 12b of the flange portion 12 does not overhang. In FIGS. 8A and 8B, symbol O ′ indicates the axis of the cylindrical collar portion 11 located at the offset position.

  Next, as shown in FIG. 6B and FIG. In this wrist-like process, the cylindrical collar portion 11 at the offset position is rest-like to a normal position to be joined to the edge 12 a of the flange portion 12 by the die 56 and the punch 57. The die 56 and the punch 57 are formed with recesses 58 and 59 for restricting the cylindrical collar portion 11 to the normal position. The concave portions 58 and 59 have a substantially semicircular arc shape that matches the outer diameter shape of the cylindrical collar portion 11. When re-striking, the cylindrical collar portion 11 is molded in the normal position by shaking the neck. In FIG. 8C, the symbol O indicates the axial center of the cylindrical collar portion 11 existing at the normal position. Although the clearance dimension between the cylindrical collar part 11 in the regular position and the edge 12a of the flange part 12 can be set to an appropriate dimension, it is, for example, about 0.5 mm to 1 mm.

  The position of the concave portion 58 of the die 56 and the position of the concave portion 59 of the punch 57 can be adjusted along two orthogonal directions indicated by arrows in FIG. For the position adjustment, for example, a known mechanism such as replacement or addition of a spacer can be adopted. Therefore, in the wrist-like process, the normal position of the cylindrical collar portion 11 can be freely adjusted between the offset position and the position where the cylindrical collar portion 11 contacts the edge 12 a of the flange portion 12. The gap dimension between the cylindrical collar part 11 in the offset position and the edge 12a of the flange part 12 can be set to an appropriate dimension.

  There may occur a situation where the normal position of the cylindrical collar portion 11 must be adjusted due to variations in molding of the cylindrical collar portion 11 and distortion at the time of joining described later. In the present embodiment, the tubular collar portion 11 can swing freely, and the normal position can be adjusted as described above. Therefore, it is possible to adjust the normal position of the cylindrical collar portion 11 only in the wrist-like process without tuning the bending process in the first to fourth curling processes. Therefore, even if a situation where the normal position of the cylindrical collar portion 11 has to be adjusted occurs, it can be dealt with only by the restructuring process without affecting other processes, and the adjustment work can be performed as much as possible. Can be reduced.

  Next, as shown in FIGS. 9A and 9B, a bonding step is performed. In this joining step, the end 12a of the flange 12 is held at the outer periphery of the tubular collar 11 while the tubular collar 11 is held at the normal position to be joined to the end 12a of the flange 12 by the joining unit. Join to the surface. Further, the distal end edge 33 of the development portion 26 is abutted against and joined to the proximal end edge 32. The joining unit includes, for example, joining means such as a welding machine, an upper jig 61 and a lower jig 62 that hold the cylindrical collar portion 11 and the arm body 13. At the time of welding joining, the cylindrical collar portion 11 is held at a normal position by the upper jig 61 and the lower jig 62. The upper jig 61 and the lower jig 62 are formed with recesses 63 and 64 for holding the cylindrical collar portion 11 in a normal position. The concave portions 63 and 64 have a substantially semicircular arc shape that matches the outer diameter shape of the cylindrical collar portion 11.

  In the transverse link 10, a pair of flange portions 12 formed on both sides of the bridge portion 30 are welded to the outer peripheral surface of the cylindrical collar portion 11. As shown in FIGS. 2B and 2C, one flange portion 12 is welded on the outside and joined to the cylindrical collar portion 11, and the other flange portion 12 is welded on the inside to join the cylindrical collar portion 11. It is joined. Further, the distal end edge 33 of the development portion 26 is butt welded and joined to the proximal end edge 32. 2 and 9, reference numeral 65 indicates a place welded on the outside of the flange portion 12, reference numeral 66 indicates a place welded on the inside of the flange portion 12, and reference numeral 67 indicates a place where butt welding is performed. Show. Moreover, in FIG. 9, the code | symbol O has shown the axial center of the cylindrical collar part 11 which exists in a regular position.

  The radial accuracy of the cylindrical collar portion 11 before joining varies due to the spring back. For this reason, in the jigs 61 and 62 at the time of welding joining, the positions of the concave portions 63 of the upper jig 61 and the concave portions 64 of the lower jig 62 are the same as the die 56 and the punch 57 used in the wrist-like process. Each position can be adjusted along two orthogonal directions indicated by arrows in FIG. For the position adjustment, for example, a known mechanism such as replacement or addition of a spacer can be adopted. Therefore, in the joining step, the normal position of the cylindrical collar portion 11 can be freely adjusted between the offset position and the position where the cylindrical collar portion 11 contacts the edge 12a of the flange portion 12.

  After the joining process, if the process of forming the burring hole 14 (see FIG. 1) is performed, the manufacture of the transverse link 10 is completed.

  In manufacturing the transverse link 10, the cylindrical collar portion 11 and the flange portion 12 are integrally formed from one blank material 20, and the cylindrical collar portion 11 and the arm body 13 are integrated. For this reason, when the cylindrical collar portion 11 and the flange portion 12 are welded and joined, two types of separate parts (a separately formed cylindrical collar portion and an arm main body) are supplied, or two types of parts are supplied. It is not necessary to determine the relative position of each other. Therefore, the manufacturing process does not become complicated, and the transverse link 10 including the cylindrical collar portion 11 and the flange portion 12 can be easily manufactured, thereby suppressing an increase in processing cost. In addition, since equipment for carrying out supply and positioning work is unnecessary, an increase in equipment costs can be suppressed, and from this point, an increase in processing costs can be suppressed. In addition, defects in supply and positioning work directly lead to the occurrence of defective products (position misalignment), but since these operations are unnecessary, the occurrence of defective products due to these work defects is fundamentally reduced. Can be eliminated.

  In addition, since the cylindrical collar portion 11 and the arm main body 13 are integrated, it is not necessary to perform inventory management and logistics management of two types of parts, and management costs and logistics costs can be reduced.

  FIG. 10 is a perspective view showing the transverse link 100 according to the comparative example in which the cylindrical collar portion 111 and the arm main body 113 are separately formed.

  As shown in the drawing, when the cylindrical collar portion 111 and the arm main body 113 of the transverse link 100 are divided and formed, a so-called tongue 114 similar to the shape of the bridge portion 30 of the present embodiment is formed on the arm main body 113, In addition to welding the tubular collar portion 111 and the flange portion 112, a form in which the tubular collar portion 111 and the tongue 114 are welded joined is conceivable. In this embodiment, after the flange portion 112 is press-molded, a part of the arm main body 113 is cut and the tongue 114 is projected. At the time of cutting, the corner portion 115 is rounded, so that the width dimension of the tongue 114 is a relatively small width dimension.

  On the other hand, in this embodiment, since the development part 26 is formed when the blank material 20 is in a flat state, the bridge part 30 having a larger width dimension than the width dimension of the tongue 114 is formed. can do. Furthermore, the cylindrical collar part 11 and the arm main body 13 are integrated via the bridge part 30 which is a raw material itself. For this reason, compared with the form which joins the cylindrical collar part 11 and the arm main body 13 by the tongue 114 and welding joining, joining strength also becomes strong.

  Thus, the joint strength between the tubular collar portion 11 and the arm main body 13 is increased by combining the point that the width of the bridge portion 30 can be increased and the point that the bridge portion 30 is the material itself. This is because the tubular collar portion 11 has sufficient strength required for design even if the joining length (welding allowance) between the edge 12a of the flange portion 12 and the outer peripheral surface of the tubular collar portion 11 is shortened. And the arm body 13 can be joined. Therefore, since the dimension of the flange portion 12 can be reduced, the yield of the material is improved correspondingly, and the material cost can be reduced. Moreover, since the dimension of the flange part 12 becomes small, the weight reduction of the transverse link 10 whole can also be achieved.

  In general, welding may cause a decrease in strength or a variation in accuracy due to distortion due to thermal effects. In the present embodiment, as described above, since the welding allowance can be shortened, the thermal influence can be suppressed, and the quality can be improved by reducing the decrease in strength and the variation in accuracy as much as possible. .

  As described above, according to the manufacturing method of the present embodiment, the cylindrical collar portion 11 for attaching other members and the bent flange portion 12 are provided, and the edge 12a of the flange portion 12 is cylindrical. In the method of manufacturing the transverse link 10 (work W) formed by joining to the outer peripheral surface of the collar portion 11, the tubular collar portion 11 is formed in order to form the tubular collar portion 11 by bending with a press. The unfolded portion 26 that constitutes the unfolded portion 26 is formed continuously and integrally with the main body portion 21 of the blank material 20, and before forming the flange portion 12, the unfolded portion 26 is subjected to bending by a press. The curling step for forming the cylindrical collar portion 11 and the offset position at which the cylindrical collar portion 11 does not interfere with the locus when the edge 12a of the flange portion 12 is bent. In a held state, a flange process by pressing the outer peripheral edge of the main body portion 21 to form the flange portion 12 by pressing, and the cylindrical collar portion 11 at a normal position to be joined to the edge 12a of the flange portion 12 A joining step of joining the edge 12a of the flange portion 12 to the outer peripheral surface of the tubular collar portion 11 in a held state, and the tubular collar portion 11 and the flange portion 12 are integrated from one blank material 20. Therefore, the transverse link 10 including the cylindrical collar portion 11 and the flange portion 12 can be easily manufactured, and an increase in processing cost can be suppressed. Furthermore, since the joining strength between the cylindrical collar portion 11 and the main body portion 21 is increased, the joining length between the edge 12a of the flange portion 12 and the outer peripheral surface of the tubular collar portion 11 can be shortened, and the yield of the material is improved. In addition, the material cost can be reduced.

  Further, since the joining step includes joining the distal end edge 33 of the development part 26 to the base end edge 32 of the development part 26, the joining strength between the cylindrical collar part 11 and the main body part 21 is further increased. be able to.

  Further, the normal position of the cylindrical collar portion 11 is freely adjustable between the offset position and the position where the cylindrical collar portion 11 abuts on the end edge 12a of the flange portion 12. Even if the normal position needs to be adjusted, it can be dealt with only by the restructuring process and the joining process without affecting other processes, and the adjustment work can be reduced as much as possible.

  Moreover, since the workpiece | work W is the transverse link 10 in the suspension for motor vehicles, the transverse link 10 can be manufactured simply and it becomes possible to suppress the increase in the processing cost of the transverse link 10. FIG.

  Moreover, according to the manufacturing apparatus of this embodiment, the cylindrical collar part 11 for attaching another member and the bent flange part 12 are provided, and the edge 12a of the flange part 12 is connected to the cylindrical collar part 11. In the apparatus for manufacturing the transverse link 10 joined to the outer peripheral surface, the development portion that constitutes the cylindrical collar portion 11 in order to form the cylindrical collar portion 11 by performing bending by pressing. 26, before forming the flange unit 12 and the trim unit that continuously and integrally forms the main body 21 in the blank material 20, the unfolded portion 26 is subjected to a bending process by pressing, and the cylindrical collar portion 11 is formed. In a state where the curling unit and the cylindrical collar portion 11 are held at an offset position that does not interfere with the locus when the edge 12a of the flange portion 12 is bent, In a state where a flange unit that forms a flange 12 by applying flange processing to the outer peripheral edge of the main body 21 and the cylindrical collar 11 is held at a regular position to be joined to the edge 12a of the flange 12, And a joining unit that joins the end edge 12a of the flange portion 12 to the outer peripheral surface of the cylindrical collar portion 11, so that the cylindrical collar portion 11 and the flange portion 12 are integrally formed from one blank material 20. Thus, the transverse link 10 including the cylindrical collar portion 11 and the flange portion 12 can be easily manufactured, and an increase in the processing cost can be suppressed. Furthermore, since the joining strength between the cylindrical collar portion 11 and the main body portion 21 is increased, the joining length between the edge 12a of the flange portion 12 and the outer peripheral surface of the cylindrical collar portion 11 can be shortened, and the yield of the material is improved. The material cost can be reduced.

(Modification)
In order to hold the cylindrical collar portion 11 in the regular position in the joining unit, the restructuring process may be omitted.

  In the curling process, the cylindrical collar portion 11 may be formed in advance so as to be in the normal position, and the cylindrical collar portion 11 may be shifted from the normal position to the offset position and held in the flange process.

  In addition, it cannot be overemphasized that the workpiece | work W provided with the cylindrical collar part 11 and the flange part 12 is not restricted to the illustrated transverse link 10. FIG. As long as the present invention is a workpiece W that includes a cylindrical collar portion 11 and a flange portion 12, and an end 12 a of the flange portion 12 is joined to the outer peripheral surface of the cylindrical collar portion 11, another automobile is provided. It can be widely applied to parts or parts in other fields.

  The present invention can be applied to manufacture a workpiece including a cylindrical collar portion and a flange portion, for example, a transverse link in an automobile suspension.

It is a perspective view which shows the transverse link in the suspension for motor vehicles as an example of the workpiece | work which is manufactured by applying this invention and is provided with a cylindrical collar part and a flange part. 2A to 2C are a perspective view, a plan view, and a bottom view showing the vicinity of the cylindrical collar portion of the transverse link shown in FIG. 3A to 3C are views showing a blank material, a draw coin process, and a trim process. FIGS. 4A and 4B are views showing a first curling process and a second curling process. 5A and 5B are views showing a 3rd curling process and a 4th curling process. 6 (A) and 6 (B) are views showing a flange process and a rewrite process. 7A to 7D are schematic cross-sectional views illustrating the first to fourth th curling steps. FIG. 8A is a side view showing a state where the cylindrical collar portion is held at the offset position in the flange process, and FIG. 8B is a side view showing a main part of the transverse link after the flange process is completed. FIG. 8C is a side view showing a state in which the cylindrical collar portion is re-stretched to a normal position in the re-striking step. FIG. 9A is a side view showing a state in which the cylindrical collar portion is held in a normal position in the joining process, and FIG. 9B is a side view showing the main part of the transverse link after the joining process. . It is a perspective view which shows the transverse link which concerns on the proportionality which divided and formed the cylindrical collar part and the arm main body.

Explanation of symbols

10 transverse link,
11 cylindrical collar,
12 flange part,
12a edge,
13 Arm body,
20 blank material,
21 body of blank material,
26 Development Department,
30 Bridge part,
31 notch,
32 Base edge of the unfolding part,
33 The leading edge of the development part,
65, 66, 67 Welded points,
O 'The axial center of the cylindrical collar at the offset position,
O The axis of the cylindrical collar at the normal position.

Claims (5)

In a method of manufacturing a workpiece comprising a cylindrical collar portion for attaching another member and a bent flange portion, and joining an edge of the flange portion to an outer peripheral surface of the cylindrical collar portion. ,
Trim process for continuously forming the development part that constitutes the cylindrical collar part continuously with the main body part in one blank material in order to form the cylindrical collar part by bending with a press When,
Before forming the flange portion, a curling step of forming the cylindrical collar portion by bending the unfolded portion to the unfolded portion;
With the cylindrical collar portion held at an offset position that does not interfere with the locus when the edge of the flange portion is bent, flange processing is performed on the outer peripheral edge of the main body portion to form the flange portion. Flange process to perform,
A joining step of joining the edge of the flange portion to the outer peripheral surface of the tubular collar portion in a state where the tubular collar portion is held at a normal position to be joined to the edge of the flange portion; Including,
A method of manufacturing a workpiece comprising a cylindrical collar portion and a flange portion, wherein the cylindrical collar portion and the flange portion are integrally formed from the one blank material.   2. The tubular collar portion and the flange portion according to claim 1, wherein the joining step includes joining the leading edge of the development portion to a base end edge of the development portion. A method for manufacturing a workpiece.   2. The normal position of the cylindrical collar portion is freely adjustable between the offset position and a position where the cylindrical collar portion abuts on the edge of the flange portion. The manufacturing method of the workpiece | work provided with the cylindrical collar part and flange part of description.   The method of manufacturing a workpiece comprising a cylindrical collar portion and a flange portion according to claim 1, wherein the workpiece is a transverse link in an automobile suspension. In the apparatus which manufactures the workpiece | work formed by joining the cylindrical collar part for attaching another member, and the bent flange part, and joining the edge of the said flange part with the outer peripheral surface of the said cylindrical collar part ,
In order to form a cylindrical collar portion by bending with a press, a trim unit that continuously and integrally forms a development portion constituting the cylindrical collar portion on a main body portion of one blank material. When,
Before forming the flange portion, a curling unit that forms a cylindrical collar portion by bending the unfolded portion with a press to the unfolded portion;
With the cylindrical collar portion held at an offset position that does not interfere with the locus when the edge of the flange portion is bent, flange processing is performed on the outer peripheral edge of the main body portion to form the flange portion. Flange unit to
A joining unit that joins the edge of the flange portion to the outer peripheral surface of the tubular collar portion in a state where the tubular collar portion is held at a normal position to be joined to the edge of the flange portion; The manufacturing apparatus of the workpiece | work provided with a cylindrical collar part and a flange part characterized by including these.

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