Stamping device for rivet production and rivet production equipment

Abstract

The utility model provides a stamping device for rivet production and rivet production equipment. The stamping device for rivet production comprises a pre-pressing mechanism and a forming mechanism. The pre-pressing mechanism comprises a first upper die punch and a first lower die, the first lower die is provided with a first containing groove and a first punched hole, the first punched hole is communicated with the first containing groove, the first containing groove is used for containing materials, the first upper die punch is provided with a convex hull cavity, and the convex hull cavity and the first punched hole are oppositely arranged; the forming mechanism comprises a second upper die punch and a second lower die, the second lower die is provided with a second containing groove and a second punched hole, the second punched hole is communicated with the second containing groove, the end, close to the second lower die, of the second upper die punch is a plane, and the second upper die punch and the second lower die are oppositely arranged. Compared with one-time punch forming in the prior art, the method can prevent the upper surface of the material from being sunken, and therefore the product yield is high.

Description

Technical Field

[0001] The present disclosure relates to the technical field of rivet production, and in particular to a stamping device and rivet production equipment for rivet production. Background Art

[0002] A rivet is a nail-shaped object used to connect two parts (or components) with a through hole and a cap at one end. In riveting, the riveted parts are connected by their own deformation or interference. In traditional technology, it is produced through die-casting, that is, placing molten metal into a mold for high-pressure shaping, but die-casting has the problems of complex process and low production efficiency.

[0003] In order to solve the above problems, a Chinese patent with application number CN202222236952.6 discloses a rivet stamping die, including an upper die body, a lower die body, a mounting hole, a push rod, an elastic part, and a punching part. The upper die body and the lower die body are arranged along the same axis and are movably connected with the lower die body along their axial direction. The mounting hole is arranged at the center of the upper die body for placing the processing material. The push rod is arranged at the center of the lower die body along the vertical direction and extends into the mounting hole to contact the processing material. The upper end of the push rod is fixedly provided with a punching part for punching the processing material.

[0004] However, the structural design of the above rivet stamping die has the following problems during use:

[0005] The above-mentioned rivet stamping die places the processing material between the upper die body and the lower die body, and the processing material is stamped into shape at one time when the upper die body and the lower die body are combined. Although this improves the production efficiency, when it comes to processing materials with thinner thickness, since the processing material extends along one side of the processing material under the extrusion of the upper die body and the lower die body, it is easy to form a depression on the upper surface of the processing material after one stamping, resulting in a low product yield problem.

[0006] Therefore, there is an urgent need for a stamping device that can avoid forming depressions on the upper surface of the rivet and has a higher product yield. Utility Model Content

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a stamping device and rivet production equipment for rivet production that avoids the formation of depressions on the upper surface of the rivet and has a high product yield.

[0008] The purpose of this disclosure is achieved through the following technical solutions:

[0009] A punching device for rivet production, comprising:

[0010] A pre-pressing mechanism, the pre-pressing mechanism comprising a first upper die punch and a first lower die, the first lower die is provided with a first receiving groove and a first punching hole, the first punching hole is connected to the first receiving groove, the first receiving groove is used to place the material, the first upper die punch is provided with a convex cavity, the convex cavity is arranged opposite to the first punching hole;

[0011] A forming mechanism, the forming mechanism includes a second upper die punch and a second lower die, the second lower die is provided with a second receiving groove and a second punching hole, the second punching hole is connected to the second receiving groove, one end of the second upper die punch adjacent to the second lower die is a plane, and the second upper die punch is arranged opposite to the second lower die.

[0012] In one embodiment, the first punching hole is located in the middle of the first receiving groove.

[0013] In one embodiment, the convex cavity includes a convex cavity body and a vent hole, one end of the vent hole is connected to the convex cavity body, and the other end of the vent hole extends to the surface of the first upper die punch.

[0014] In one embodiment, the depth of the convex cavity body is 1mm-1.5mm.

[0015] In one embodiment, the first lower mold is further provided with a first mounting hole, and the first mounting hole is used for a fixing member to pass through; and / or,

[0016] The second lower mold is also provided with a second mounting hole, and the second mounting hole is used for the fixing member to pass through.

[0017] In one embodiment, the cross section of the first receiving groove is circular.

[0018] In one embodiment, the cross section of the second receiving groove is circular.

[0019] In one embodiment, the area of ​​the end surface of the first upper die punch adjacent to the first lower die is greater than or equal to the area of ​​the first accommodating groove.

[0020] In one embodiment, the area of ​​the end surface of the second upper die punch adjacent to the second lower die is greater than or equal to the area of ​​the second receiving groove.

[0021] A rivet production device comprises the punching device for rivet production described in any one of the above embodiments.

[0022] Compared with the prior art, the present invention has at least the following advantages:

[0023] In the above-mentioned stamping device for rivet production, the first lower die is provided with a first receiving groove and a first punching hole, the first punching hole is connected with the first receiving groove, the first receiving groove is used to place the material, and the first upper die punch is provided with a convex cavity, the convex cavity is arranged opposite to the first punching hole. When processing thinner materials, under the extrusion of the first upper die punch and the first lower die, the lower surface of the material is deformed along the extension direction of the first punching hole, and the upper surface of the material is deformed along the extension direction of the convex cavity, that is, both sides of the material are deformed. Furthermore, the material after the first stamping is placed in the forming mechanism for secondary stamping. Since the end face of the second upper die punch is a plane, under the extrusion of the second upper die punch and the second lower die, the convex bulge formed on the upper surface of the material is flattened by the second upper die punch to obtain a finished rivet. Specifically, the material is stamped twice by a pre-pressing mechanism and a forming mechanism, and a convex bump is squeezed out on the upper surface of the material during the first stamping. Compared with the one-time stamping forming of the traditional technology, the present application can effectively avoid the formation of depressions on the upper surface of the material, thereby making the product yield higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic structural diagram of a punching device for rivet production according to an embodiment;

[0026] Figure 2 for Figure 1 Another schematic diagram of the structure of the punching device for rivet production shown;

[0027] Figure 3 for Figure 1 A schematic structural diagram of a first upper die punch of a punching device for rivet production shown;

[0028] Figure 4 Schematic diagram of the shape change of the processed material after pre-pressing and forming stamping. DETAILED DESCRIPTION

[0029] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] The present disclosure provides a stamping device for rivet production, including a pre-pressing mechanism and a forming mechanism, the pre-pressing mechanism includes a first upper die punch and a first lower die, the first lower die is provided with a first receiving groove and a first punching hole, the first punching hole and the first receiving groove are communicated, the first receiving groove is used to place materials, the first upper die punch is provided with a convex cavity, and the convex cavity is arranged opposite to the first punching hole; the forming mechanism includes a second upper die punch and a second lower die, the second lower die is provided with a second receiving groove and a second punching hole, the second punching hole is communicated with the second receiving groove, one end of the second upper die punch adjacent to the second lower die is a plane, and the second upper die punch is arranged opposite to the second lower die.

[0033] In the above-mentioned stamping device for rivet production, the first lower die is provided with a first receiving groove and a first punching hole, the first punching hole is connected with the first receiving groove, the first receiving groove is used to place the material, and the first upper die punch is provided with a convex cavity, the convex cavity is arranged opposite to the first punching hole. When processing thinner materials, under the extrusion of the first upper die punch and the first lower die, the lower surface of the material is deformed along the extension direction of the first punching hole, and the upper surface of the material is deformed along the extension direction of the convex cavity, that is, both sides of the material are deformed. Furthermore, the material after the first stamping is placed in the forming mechanism for secondary stamping. Since the end face of the second upper die punch is a plane, under the extrusion of the second upper die punch and the second lower die, the convex bulge formed on the upper surface of the material is flattened by the second upper die punch to obtain a finished rivet. Specifically, the material is stamped twice by a pre-pressing mechanism and a forming mechanism, and a convex bump is squeezed out on the upper surface of the material during the first stamping. Compared with the one-time stamping forming of the traditional technology, the present application can effectively avoid the formation of depressions on the upper surface of the material, thereby making the product yield higher.

[0034] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0035] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a stamping device 10 for rivet production in one embodiment includes a pre-pressing mechanism 100 and a forming mechanism 200. The pre-pressing mechanism 100 includes a first upper die punch 110 and a first lower die 120, the first lower die 120 is provided with a first receiving groove 121 and a first punching hole 122, the first punching hole 122 and the first receiving groove 121 are connected, the first receiving groove 121 is used to place materials, the first upper die punch 110 is provided with a convex cavity 111, the convex cavity 111 is arranged opposite to the first punching hole 122, so that the first upper die punch 110 and the first lower die 120 can punch the processing material 10a, and a convex hull will be formed on the upper surface of the processing material 10a after one punching, that is, the intermediate material 10b is formed after one punching.

[0036] Furthermore, the forming mechanism 200 includes a second upper die punch 210 and a second lower die 220, the second lower die 220 is provided with a second accommodating groove 221 and a second punching hole 222, the second punching hole 222 is communicated with the second accommodating groove 221, the end of the second upper die punch 210 adjacent to the second lower die 220 is a plane, and the second upper die punch 210 and the second lower die 220 are arranged opposite to each other, so that the second upper die punch 210 and the second lower die 220 perform secondary stamping forming on the intermediate material 10b to obtain a finished rivet 10c.

[0037] In this embodiment, the processing material 10a is first placed on the first accommodating groove 121, and the first upper die punch 110 is moved downward by external drive until the first upper die punch 110 abuts against the first lower die 120. At this time, the first upper die punch 110 and the first lower die 120 punch the processing material 10a once, and because the first upper die punch 110 is provided with a convex cavity 111, a convex bulge is formed on the upper surface of the processing material 10a after one punching, and the lower surface of the processing material 10a is deformed along the extension direction of the first punching hole 122 to form a columnar structure, that is, both sides of the processing material 10a are deformed during one punching, and the processing material 10a forms an intermediate material 10b after one punching. Furthermore, the intermediate material 10b is placed on the second receiving groove 221, and the second upper die punch 210 is moved downward by external drive until the second upper die punch 210 abuts against the second lower die 220. At this time, the second upper die punch 210 and the second lower die 220 punch the intermediate material 10b, and since the end face of the second upper die punch 210 is a plane, the convex bump on the upper surface of the intermediate material 10b is flattened, and the columnar structure on the lower surface of the intermediate material 10b is further formed along the extension direction of the second punching hole 222 to obtain a finished rivet 10c.

[0038] In the above-mentioned punching device 10 for rivet production, the first lower die 120 is provided with a first receiving groove 121 and a first punching hole 122, the first punching hole 122 is connected with the first receiving groove 121, the first receiving groove 121 is used to place the material, and the first upper die punch 110 is provided with a convex cavity 111, and the convex cavity 111 is arranged opposite to the first punching hole 122. When processing thinner materials, under the extrusion of the first upper die punch 110 and the first lower die 120, the lower surface of the material is deformed along the extension direction of the first punching hole 122, and the upper surface of the material is deformed along the extension direction of the convex cavity 111, that is, both sides of the material are deformed. Furthermore, the material after the first stamping is placed in the forming mechanism 200 for a second stamping. Since the end face of the second upper die punch 210 is a plane, under the extrusion of the second upper die punch 210 and the second lower die 220, the convex bump formed on the upper surface of the material is flattened by the second upper die punch 210 to obtain the finished rivet 10c. Specifically, the material is stamped twice by the pre-pressing mechanism 100 and the forming mechanism 200, and a convex bump is first squeezed out on the upper surface of the material during the first stamping. Compared with the one-time stamping molding of the traditional technology, the present application can effectively avoid the formation of depressions on the upper surface of the material, thereby making the product yield higher.

[0039] like Figure 2As shown, in one embodiment, the first punching hole 122 is located in the middle of the first receiving groove 121. It can be understood that the first punching hole 122 is located in the middle of the first receiving groove 121, so that the columnar structure is formed in the middle of the intermediate material 10b during pre-pressing. Further, the second punching hole 222 is also located in the middle of the second receiving groove 221, so that the columnar structure of the intermediate material 10b is further deformed along the extension direction of the second punching hole 222 to form a nail head.

[0040] like Figure 3 As shown, in one embodiment, the convex cavity 111 includes a convex cavity body 112 and a vent 113, one end of the vent 113 is connected to the convex cavity body 112, and the other end of the vent 113 extends to the surface of the first upper die punch 110. It can be understood that during the pre-pressing process, the upper surface of the processed material 10a is deformed along the extension direction of the convex cavity body 112 to form a convex hull, that is, under the stamping of the first upper die punch 110 and the second lower die 220, both sides of the processed material 10a are deformed to prevent a depression from being formed on the upper surface during the stamping process of thinner materials, thereby affecting the product yield. Furthermore, the vent 113 is connected to the outside air to prevent the problem that a convex hull cannot be formed on the upper surface of the processed material 10a due to the air pressure in the convex cavity body 112.

[0041] like Figure 3 As shown, in one embodiment, the depth of the convex cavity body 112 is 1mm-1.5mm. In this embodiment, the depth of the convex cavity body 112 is 1mm, so that during the pre-pressing process, a convex cavity with a height of 1mm is formed on the upper surface of the processed material 10a.

[0042] like Figure 1 As shown, in one embodiment, the first lower die 120 is further provided with a first mounting hole 130, and the first mounting hole 130 is used for a fixing member to pass through. In this embodiment, the fixing member can be a screw to fix the first lower die 120 on the machine tool.

[0043] like Figure 1 As shown, in one embodiment, the second lower die 220 is further provided with a second mounting hole 230, and the second mounting hole 230 is used for a fixing member to pass through. In this embodiment, the fixing member can be a screw to fix the second lower die 220 on the machine tool.

[0044] like Figure 2 As shown, in one embodiment, the cross-section of the first receiving groove 121 is circular, so that the middle part of the intermediate material 10b formed after one stamping is a cylindrical structure. Of course, in other embodiments, the cross-section of the first receiving groove 121 can also be other shapes such as ellipse and rectangle.

[0045] like Figure 2 As shown, in one embodiment, the cross section of the second accommodating groove 221 is circular, so that the second accommodating groove 221 is adapted to the shape of the first accommodating groove 121. Of course, in other embodiments, the cross section of the second accommodating groove 221 can also be elliptical, rectangular or other shapes.

[0046] like Figure 1 , Figure 2 As shown, in one embodiment, the area of ​​the end face of the first upper die punch 110 adjacent to the first lower die 120 is greater than or equal to the area of ​​the first receiving groove 121. It can be understood that if the area of ​​the end face of the first upper die punch 110 adjacent to the first lower die 120 is smaller than the area of ​​the first receiving groove 121, the first upper die punch 110 will not be able to punch the processed material 10a into the desired shape, that is, the intermediate material 10b formed after one punching will be irregularly deformed. In this embodiment, the area of ​​the end face of the first upper die punch 110 adjacent to the first lower die 120 is equal to the area of ​​the first receiving groove 121 to avoid irregular deformation of the intermediate material 10b formed after one punching.

[0047] like Figure 1 , Figure 2 As shown, in one embodiment, the area of ​​the end face of the second upper die punch 210 adjacent to the second lower die 220 is greater than or equal to the area of ​​the second receiving groove 221. It can be understood that the area of ​​the end face of the second upper die punch 210 adjacent to the second lower die 220 is greater than or equal to the area of ​​the second receiving groove 221, so as to prevent irregular deformation of the rivet caused by the area of ​​the end face of the second lower die 220 being smaller than the area of ​​the second receiving groove 221 during the stamping process.

[0048] The present application also provides a rivet production device, comprising the punching device 10 for rivet production described in any of the above embodiments.

[0049] Compared with the prior art, the present invention has at least the following advantages:

[0050] In the above-mentioned punching device 10 for rivet production, the first lower die 120 is provided with a first receiving groove 121 and a first punching hole 122, the first punching hole 122 is connected with the first receiving groove 121, the first receiving groove 121 is used to place the material, and the first upper die punch 110 is provided with a convex cavity 111, and the convex cavity 111 is arranged opposite to the first punching hole 122. When processing thinner materials, under the extrusion of the first upper die punch 110 and the first lower die 120, the lower surface of the material is deformed along the extension direction of the first punching hole 122, and the upper surface of the material is deformed along the extension direction of the convex cavity 111, that is, both sides of the material are deformed. Furthermore, the material after the first stamping is placed in the forming mechanism 200 for a second stamping. Since the end face of the second upper die punch 210 is a plane, under the extrusion of the second upper die punch 210 and the second lower die 220, the convex bump formed on the upper surface of the material is flattened by the second upper die punch 210 to obtain the finished rivet 10c. Specifically, the material is stamped twice by the pre-pressing mechanism 100 and the forming mechanism 200, and a convex bump is first squeezed out on the upper surface of the material during the first stamping. Compared with the one-time stamping molding of the traditional technology, the present application can effectively avoid the formation of depressions on the upper surface of the material, thereby making the product yield higher.

[0051] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be based on the attached claims.

Claims

1. A punching device for rivet production, characterized in that: include: A pre-pressing mechanism, the pre-pressing mechanism comprising a first upper die punch and a first lower die, the first lower die is provided with a first receiving groove and a first punching hole, the first punching hole is connected with the first receiving groove, the first receiving groove is used to place the material, the first upper die punch is provided with a convex cavity, the convex cavity is arranged opposite to the first punching hole; A forming mechanism, the forming mechanism includes a second upper die punch and a second lower die, the second lower die is provided with a second receiving groove and a second punching hole, the second punching hole is connected to the second receiving groove, one end of the second upper die punch adjacent to the second lower die is a plane, and the second upper die punch is arranged opposite to the second lower die.

2. The punching device for rivet production according to claim 1, characterized in that: The first punching hole is located in the middle of the first accommodating groove.

3. The punching device for rivet production according to claim 1, characterized in that: The convex cavity includes a convex cavity body and a vent hole, one end of the vent hole is connected to the convex cavity body, and the other end of the vent hole extends to the surface of the first upper die punch.

4. The punching device for rivet production according to claim 3, characterized in that: The depth of the convex cavity body is 1mm-1.5mm.

5. The punching device for rivet production according to claim 1, characterized in that: The first lower mold is further provided with a first mounting hole, and the first mounting hole is used for a fixing member to pass through; and / or, The second lower mold is also provided with a second mounting hole, and the second mounting hole is used for the fixing member to pass through.

6. The punching device for rivet production according to claim 1, characterized in that: The cross section of the first containing groove is circular.

7. The punching device for rivet production according to claim 1, characterized in that: The cross section of the second accommodation groove is circular.

8. The punching device for rivet production according to claim 1, characterized in that: An area of ​​an end surface of the first upper die punch adjacent to the first lower die is greater than or equal to an area of ​​the first accommodating groove.

9. The punching device for rivet production according to claim 1, characterized in that: An area of ​​an end surface of the second upper die punch adjacent to the second lower die is greater than or equal to an area of ​​the second accommodating groove.

10. A rivet production equipment, characterized in that: A punching device for rivet production comprising any one of claims 1 to 9.

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