CN202137323U - Self-riveting punch - Google Patents

Abstract

A self-riveting punch. The self-riveting punch is matched with a die holder for use, the die holder is provided with a concave part, the self-riveting punch comprises a protruding section and a plurality of protruding parts, the protruding section is used for extending into the concave part of the die holder, the protruding section is provided with a stamping end face, and the plurality of protruding parts radially protrude from the protruding section and are adjacent to the stamping end face. The utility model discloses by the formation of bulge for when riveting the drift from when first plate and second plate punching press, can produce the effect of pushing outward more to first plate, make first plate more toward outer radial expansion embedding second plate, improve the self-riveting intensity of first plate and second plate.

Description

Self riveting punch

technical field

The utility model relates to a punch, in particular to a self-riveting punch.

Background technique

Generally speaking, two objects or boards are combined into one body by, for example, screwing, snapping or riveting.

Or, as disclosed in Taiwan Patent No. 320678, the superimposed plates are deformed by stamping (for example, through a self-riveting machine, TOX machine) to cause structural interference, thereby achieving a combination that can be combined without using rivets. Self riveting effect.

Therefore, it is necessary to provide a self-rivet punch that improves the self-rivet strength between the plates.

Utility model content

Since the above-mentioned self-riveting method is achieved through deformation between the plates, how to increase the degree of deformation interference between the plates and improve the self-riveting strength between the plates is the problem to be solved by the utility model.

Therefore, the utility model provides a self-riveting punch, which includes a protruding section and a plurality of protruding parts, the protruding section is used to extend into a concave part of a mold base, and the protruding section has A stamped end surface, the protrusion protrudes radially from the protrusion and is adjacent to the stamped end surface.

A self-riveting punch of the present utility model, the self-riveting punch is used with a mold base, the mold base has a concave part, the self-riveting punch includes: a protruding section, the protruding section is used to extend into The concave part of the mold base, the protruding section has a stamping end surface; and a plurality of protruding parts protrude radially from the protruding section and are adjacent to the stamping end surface.

Further, the protruding section also has an outer peripheral surface connected to the stamping end surface, the protrusions extend axially along the outer peripheral surface of the protrusion section to the stamping end surface, and the protrusions surround the stamping end surface.

Further, the protruding parts are convex strip structures with curved outer surfaces.

Further, the protrusions are tooth-shaped.

Further, the self-riveting punch also includes a body, the protruding section extends axially from the body and is roughly frusto-conical, the self-riveting punch is assembled on a punching machine by the body, and the protruding section is The out section faces the concave part of the mold base.

The effect of the utility model is that by improving the stamping end structure of the self-riveting punch, when the self-riveting punch is used to stamp the workpiece (especially when stamping for the second time), the workpiece can be moved further outward radially. Pushing, increasing its degree of chimerism.

Description of drawings

Fig. 1 is a partial perspective view of the first embodiment of the self-riveting punch of the present invention;

Fig. 2 and Fig. 3 are schematic cross-sectional views of a process in which a first plate and a second plate are stamped by a punch to produce local concave deformation;

Fig. 4 is a schematic cross-sectional view of the recessed area of the first plate and the second plate being punched by the self-riveting punch;

Fig. 5 is a three-dimensional cross-sectional view of the first plate and the second plate after being punched by the self-riveting punch;

Fig. 6 is a partial perspective view of the second embodiment of the present invention; and

Fig. 7 is an end view of the third embodiment of the present invention.

Description of main component symbols:

Detailed ways

The aforementioned and other technical contents, features and effects of the present utility model will be clearly presented in the following detailed description of the three embodiments with reference to the accompanying drawings.

Before the present invention is described in detail, it should be noted that in the following description, similar components are denoted by the same numerals.

Referring to Fig. 1, the first embodiment of the self-riveting punch 1 of the present utility model includes a body 10, a protruding section 11 protruding from the body 10, and a plurality of protruding parts 12, and the protruding section 11 has a stamping end surface 111 , the protruding portion 12 protrudes radially from the protruding section 11 and is adjacent to the punched end face 111 .

Specifically, the main body 10 can be, for example, columnar, and the protruding section 11 protrudes axially from the main body 10 and is in the shape of a truncated conical column whose outer diameter tapers away from the main body 10. The stamped end surface 111 is the protruding section 11 It is away from the end surface of the body 10 , and the protruding section 11 also has an outer peripheral surface 112 connected to the punched end surface 111 .

The protruding portion 12 is annularly distributed around the stamping end surface 111. In this embodiment, the protruding portion 12 is roughly in the form of a convex strip structure extending axially along the outer peripheral surface 112 of the protruding section 11 to the stamping end surface 111, and is stamped toward the adjacent The direction area of the end face 111 increases gradually, and the outer surface of the protruding portion 12 is curved. The protruding portion 12 makes the overall outer diameter of the protruding section 11 at the stamping end face 111 expand outwards compared with the original contour of the stamping end face 111 .

Referring to Figure 4, the self-riveting punch 1 is used to cooperate with a die base 3, the die base 3 has a concave portion 31, the self-riveting punch 1 and the die base 3 can be installed on a stamping machine and are self-riveting The protruding section 11 of the punch 1 faces the concave portion 31 of the mold base 3 , and the self-clinching punch 1 can be driven to be adjacent to the mold base 3 so that the protruding section 11 extends into the concave portion 31 of the mold base 3 .

Referring to Fig. 2 and Fig. 3, taking the combination of a first plate 21 and a second plate 22 as an example, the first and second plates 22 are stacked and placed on the mold base 3, first using a punch 4. Punch the areas of the first plate 21 and the second plate 22 corresponding to the recessed portion 31 into the recessed portion 31 , wherein the first plate 21 is closer to the punch 4 and the second plate 22 is closer to the die base 3 . It has been explained in advance that the punch 4 also has a protruding section 41 that is generally in the shape of a truncated cone. The outer diameter of the protruding section 11 is the same or slightly smaller. However, the protruding section 11 of the self-riveting punch 1 is formed with a protruding portion 12. The diameter is greater than the outer diameter of the end face 42 of the protruding section 41 of the punch 4 .

When punching the first plate 21 and the second plate 22 with the punch 4, the second plate 22 adjacent to the mold base 3 will be punched out with a U-shaped second groove 221 and form a groove opening 222, and the first plate 21 adjacent to the punch 4 is punched out a first groove 211 located in the second groove 221, and the first groove 211 has a bottom wall 212, a connecting bottom wall 212 The outer diameter D2 of the concave peripheral wall 213 and the bottom wall 212 is greater than the diameter D1 of the groove opening 222 of the second groove 221. Dovetail shaped.

Referring to Figures 3 to 5, next, in order to strengthen the strength of the first plate 21 embedded in the second plate 22, as shown in Figure 4, the first plate 21 and the second plate are paired by using the self-rivet punch 1. When stamping the piece 22, during operation, the self-riveting punch 1 is driven to make the protruding section 11 extend into the first groove 211 of the first plate 21 again, and the concave peripheral wall of the first groove 211 is pressed by the protruding part 12 213 caused a push.

It is worth mentioning that when the first plate 21 and the second plate 22 are stamped again by using the self-rivet punch 1, since the first plate 21 directly contacts the protruding section 11 and the second plate 22 of the self-rivet punch 1 The protruding part 12, in the process of punching, compared with the first plate 21, the second plate 22 will not receive too much radial force from the protruding section 11 of the self-riveting punch 1, Therefore, the caliber D1 of the groove opening 222 of the second groove 221 does not expand too much. Instead, it is the first plate 21 that is directly in contact with the self-riveting punch 1. Compared with the aforementioned punch 4 , the self-rivet punch 1 also increases the contact area between the protruding part 12 and the first plate 21, therefore, the radial push of the protruding part 12 of the self-rivet punch 1 and the downward punch of the self-rivet punch 1 Pressure, the material of the first plate 21 located in the second groove 221 will be pushed outwards towards the second groove 221, especially in the area where the bottom wall 212 of the first groove 211 is connected with the concave peripheral wall 213, thus The dovetail angle of the first groove 211 is sharper and more embedded in the second groove 221. In other words, the bottom wall 212 of the first groove 211 punched by the self-riveting punch 1 is further expanded radially outward so that The outer diameter D3 of the bottom wall (that is, the expanded D2) is larger than the diameter D1 of the groove opening 222 of the second groove 221, and the expansion deformation of the first groove 211 also increases the friction force with the second groove 221, Therefore, it is more difficult for the first plate 21 to be detached from the second plate 22 , thereby increasing the stability of the combination of the first plate 21 and the second plate 22 .

Referring to Fig. 6, it is the second embodiment of the present utility model, the difference lies in the structural form of the protruding part 13, wherein, the thickness of the protruding part 13 in the shape of a convex strip can be adjusted according to the actual application change, in addition, the stamping end face The contour of 111 located between the two protruding parts 13 is a concave arc.

Referring to Fig. 7, it is the third embodiment of the present utility model, and its difference also lies in the structural form of the protruding part 14, wherein, the specific structure of the protruding part 14 is substantially square tooth shape, but its tooth shape is not like this As a limit, it can also be, for example, trapezoidal tooth type or triangular tooth type, etc.

In a word, the utility model improves the stamping end structure of the self-rivet punch 1 so that when the self-rivet punch 1 is used to stamp the workpiece (especially during the second stamping), the workpiece can be further radially outward. Pushing, increasing its degree of chimerism.

To sum up, the present utility model makes it possible for the first plate 21 to A more pushing effect is produced, so that the first plate 21 is radially expanded and embedded in the second plate 22, and the degree of interference and friction between the first groove 211 and the second groove 221 are increased, thereby improving the first plate. The self-clinching strength of the member 21 and the second plate 22 makes it more difficult for the first plate 21 to be separated from the second plate 22, so the purpose of this utility model can indeed be achieved.

However, the above are only examples of the utility model, and should not limit the implementation scope of the utility model, that is, any simple equivalent changes made according to the scope of the utility model claims and the content of the utility model description and modification, all still belong to the scope covered by the utility model patent.

Claims (5)

1. A self-riveting punch, the self-riveting punch is used in conjunction with a die base, the die base has a recess, it is characterized in that the self-riveting punch comprises: a protruding section, the protruding section is used to extend into the recessed portion of the mold base, the protruding section has a stamping end surface; and A plurality of protrusions protrude radially from the protrusion section and are adjacent to the punched end face. 2. The self-riveting punch according to claim 1, wherein the protruding section also has an outer peripheral surface connected to the punching end surface, and the protruding parts extend axially along the outer peripheral surface of the protruding section to The stamped end surface, and the protrusions surround the stamped end surface. 3. The self-riveting punch according to claim 2, wherein the protruding parts are convex strip structures with curved outer surfaces. 4. The self-clinching punch according to claim 2, wherein the protrusions are tooth-shaped. 5. The self-riveting punch according to any one of claims 1 to 4, characterized in that, the self-riveting punch also includes a body for assembling on a stamping machine table, and the protruding section is formed by the shaft of the body Extends outward and is roughly frusto-conical in shape.

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