Cold heading die structure of projection welding bolt

Abstract

The utility model relates to the field of cold heading dies, in particular to a cold heading die structure of a projection welding bolt, which comprises a pier head pretreatment die, a five-sequence trimming and hole-extruding die and a six-sequence chamfering forming die, and the five-sequence trimming and hole-extruding die comprises a five-sequence punching die and a five-sequence main die. The five-sequence stamping die comprises a five-sequence stamping die shell, a stamping die cushion point, a stamping die cushion block, a stamping die ejector pin and a trimming punch, the stamping die cushion point, the stamping die cushion block, the stamping die ejector pin and the trimming punch are sequentially and downwards arranged in the five-sequence stamping die shell, the five-sequence main die comprises a five-sequence main die shell, a five-sequence main die bolt, a five-sequence main die core and a five-sequence main die piece, and the five-sequence main die piece is arranged on the upper side of the interior of the five-sequence main die shell. The fifth-sequence main die core is arranged in the fifth-sequence main die shell, the fifth-sequence main die bolt is arranged at the lower end of the fifth-sequence main die shell, a main die hole extruding ejector pin is eccentrically arranged on the right side of the fifth-sequence main die core, the main die hole extruding ejector pin is arranged towards the fifth-sequence main die piece, the sixth-sequence chamfering forming die comprises a sixth-sequence punching die and a sixth-sequence main die, and a sixth-sequence punching die piece is arranged at the lower end in the sixth-sequence punching die. And a six-sequence main mold sheet is arranged at the upper end in the six-sequence main mold.

Description

Technical Field

[0001] This utility model relates to the field of cold heading dies, and specifically to a cold heading die structure for projection welding bolts. Background Technology

[0002] Projection weld bolts are produced using a combination of multi-station cold upsetting and punch trimming. The specific process flow is as follows: shearing → tensioning → pre-shaping → pre-upsetting → upsetting → piercing → punch trimming → chamfering. However, because this bolt requires additional machining and chamfering, the forming efficiency is low and the cost is high.

[0003] Therefore, in order to overcome the shortcomings of the existing technology, it is necessary to design a simple cold heading die structure for projection welding bolts. Utility Model Content

[0004] This utility model provides a cold heading die structure for projection welding bolts to solve the problems of the prior art.

[0005] The objective of this utility model can be achieved through the following technical solution: A cold heading die structure for projection welding bolts includes: a head-up pretreatment die, a five-stage trimming and extrusion die, and a six-stage chamfering forming die. The five-stage trimming and extrusion die includes a five-stage punch and a five-stage main die. The five-stage punch includes a five-stage punch shell, punch pads, punch ejector pins, and trimming punches arranged sequentially downwards inside the five-stage punch shell. The punch ejector pins sequentially pass downwards through the punch pads and punch pads to the trimming punch. The five-stage main die includes a five-stage main die shell, a five-stage main die bolt, a five-stage main die core, and a five-stage main die. The five-stage main mold piece is disposed on the upper side inside the five-stage main mold shell. The five-stage main mold core is disposed inside the five-stage main mold shell. The five-stage main mold bolt is disposed at the lower end of the five-stage main mold shell. The five-stage main mold core is eccentrically provided with a main mold extrusion hole ejector pin on its right side. The main mold extrusion hole ejector pin is disposed upward through the five-stage main mold piece. The five-stage main mold bolt, the five-stage main mold core, and the five-stage main mold piece are sequentially provided with five-stage main mold ejector pin channels. The six-stage chamfering forming mold includes a six-stage punch and a six-stage main mold. The lower end of the interior of the six-stage punch is provided with a six-stage punch piece, and the upper end of the interior of the six-stage main mold is provided with a six-stage main mold piece.

[0006] In a further improvement, the pre-treatment mold for the head includes a first-order strong-bundle mold, a second-order pre-upsetting mold, a third-order head secondary upsetting mold, and a fourth-order head forming mold.

[0007] In a further improvement, the first-order strong beam die includes a first-order punch die and a first-order main die. The lower end of the first-order punch die is provided with a first-order punch die piece, and the first-order punch die is provided with a punch that passes through the first-order punch die piece. The upper end of the first-order main die is provided with a first-order main die piece.

[0008] In a further improvement, the second-stage pre-upsetting die includes a second-stage punch die and a second-stage main die. The lower end of the interior of the second-stage punch die is provided with a second-stage punch die piece, and the interior of the second-stage punch die is provided with a second punch that passes through the second-stage punch die piece. The upper end of the interior of the second-stage main die is provided with a second-stage main die piece.

[0009] In a further improvement, the three-stage head secondary upsetting die includes a three-stage punch die and a three-stage main die. The lower end of the interior of the three-stage punch die is provided with a three-stage punch die piece, and the upper end of the interior of the three-stage main die is provided with a three-stage main die piece.

[0010] In a further improvement, the four-stage head forming die includes a four-stage punch die and a four-stage main die. The lower end of the interior of the four-stage punch die is provided with a four-stage punch die piece, and the upper end of the interior of the four-stage main die is provided with a four-stage main die piece.

[0011] Compared with the prior art, the advantages of the cold heading die structure for the projection weld bolt of this utility model are as follows:

[0012] First, the projected weld bolt is forcibly bonded using a first-stage strong-binding die. Then, it is pre-upset using a second-stage pre-upsetting die. Next, the bolt head is secondarily upset using a third-stage head secondary upsetting die. Then, the bolt head is formed using a fourth-stage head forming die. Finally, the bolt is trimmed and extruded using a fifth-stage trimming and extrusion die. Finally, the bolt is chamfered using a sixth-stage chamfering die. No additional machining or chamfering is required, achieving one-step forming. Since trimming and extrusion are performed simultaneously in the fifth stage, the die needs a material receiving structure. Also, considering the short bolt shank and the need for clamp transfer during die forming, the chamfering is performed separately in the sixth stage, simplifying the production process, improving efficiency, and reducing costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a sequential strong beam mode in this utility model.

[0014] Figure 2 This is a schematic diagram of the structure of the two-stage pre-upsetting head die in this utility model.

[0015] Figure 3 This is a schematic diagram of the structure of the three-stage head secondary upsetting die in this utility model.

[0016] Figure 4 This is a schematic diagram of the structure of the four-stage head forming mold in this utility model.

[0017] Figure 5 This is a schematic diagram of the structure of the five-stage cutting and extrusion die in this utility model.

[0018] Figure 6 This is a schematic diagram of the six-stage chamfering forming mold in this utility model.

[0019] In the diagram, 1-first-sequence strong-binding die, 11-first-sequence punching die, 111-first-sequence punching die piece, 112-punch one, 12-first-sequence main die, 121-first-sequence main die piece, 2-second-sequence pre-upsetting head die, 21-second-sequence punching die, 211-second-sequence punching die piece, 212-punch two, 22-second-sequence main die, 221-second-sequence main die piece, 3-third-sequence head secondary upsetting die, 31-third-sequence punching die, 311-third-sequence punching die piece, 32-third-sequence main die, 321-third-sequence main die piece, 4-fourth-sequence head forming die, 41-fourth-sequence punching die, 411-fourth-sequence punching die piece, 42-fourth-sequence main die, 42 1-Fourth-order main mold piece, 5-Fifth-order trimming and extrusion mold, 51-Fifth-order punch, 511-Fifth-order punch shell, 512-Punch pad, 513-Punch pad block, 514-Punch ejector pin, 515-Trimming punch, 52-Fifth-order main mold, 53-Fifth-order main mold bolt, 54-Fifth-order main mold shell, 55-Fifth-order main mold ejector pin channel, 56-Fifth-order main mold core, 57-Fifth-order main mold piece, 58-Main mold extrusion ejector pin, 6-Sixth-order chamfering forming mold, 61-Sixth-order punch, 611-Sixth-order punch piece, 62-Sixth-order main mold, 621-Sixth-order main mold piece, 7-Pre-treatment mold for head forming. Detailed Implementation

[0020] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] The following describes the embodiments and appendices. Figures 1-6 The technical solution of this utility model will be further described below.

[0023] Example 1

[0024] A cold heading die structure for projection welding bolts includes: a head-up pretreatment die 7, a five-stage trimming and extrusion die 5, and a six-stage chamfering forming die 6. The five-stage trimming and extrusion die 5 includes a five-stage punch die 51 and a five-stage main die 52. The five-stage punch die 51 includes a five-stage punch die shell 511, punch pads 512, punch pad blocks 513, punch ejector pins 514, and trimming punches 515 arranged sequentially downward inside the five-stage punch die shell 511. The punch ejector pins 514 pass sequentially downward through the punch pads 512 and punch pad blocks 513 to the trimming punches 515. The five-stage main die 52 includes a five-stage main die shell 54, a five-stage main die bolt 53, a five-stage main die core 56, and a five-stage main die piece 57. The mold piece 57 is disposed on the upper side inside the fifth-order main mold shell 54. The fifth-order main mold core 56 is disposed inside the fifth-order main mold shell 54. The fifth-order main mold bolt 53 is disposed at the lower end of the fifth-order main mold shell 54. The fifth-order main mold core 56 is eccentrically provided with a main mold extrusion hole ejector pin 58 on the right side. The main mold extrusion hole ejector pin 58 is disposed upward through the fifth-order main mold piece 57. The fifth-order main mold bolt 53, the fifth-order main mold core 56 and the fifth-order main mold piece 57 are sequentially provided with fifth-order main mold ejector pin channels 55. The sixth-order chamfering forming mold 6 includes a sixth-order punch 61 and a sixth-order main mold 62. The lower end of the interior of the sixth-order punch 61 is provided with a sixth-order punch piece 611, and the upper end of the interior of the sixth-order main mold 62 is provided with a sixth-order main mold piece 621.

[0025] As a further preferred embodiment, the pre-treatment mold 7 for the head includes a first-order strong beam mold 1, a second-order pre-upsetting head mold 2, a third-order head secondary upsetting mold 3, and a fourth-order head forming mold 4.

[0026] As a further preferred embodiment, the sequential strong beam die 1 includes a sequential punch die 11 and a sequential main die 12. The lower end of the sequential punch die 11 is provided with a sequential punch die piece 111. The sequential punch die 11 is provided with a punch 112 that passes through the sequential punch die piece 111. The upper end of the sequential main die 12 is provided with a sequential main die piece 121.

[0027] As a further preferred embodiment, the second-order pre-upsetting die 2 includes a second-order punching die 21 and a second-order main die 22. The lower end of the interior of the second-order punching die 21 is provided with a second-order punching die piece 211. The interior of the second-order punching die 21 is provided with a punch 212 that passes through the second-order punching die piece 211. The upper end of the interior of the second-order main die 22 is provided with a second-order main die piece 221.

[0028] As a further preferred embodiment, the three-stage head secondary upsetting die 3 includes a three-stage punch die 31 and a three-stage main die 32. The lower end of the interior of the three-stage punch die 31 is provided with a three-stage punch die piece 311, and the upper end of the interior of the three-stage main die 32 is provided with a three-stage main die piece 321.

[0029] As a further preferred embodiment, the four-stage head forming mold 4 includes a four-stage punch 41 and a four-stage main mold 42. The lower end of the interior of the four-stage punch 41 is provided with a four-stage punch piece 411, and the upper end of the interior of the four-stage main mold 42 is provided with a four-stage main mold piece 421.

[0030] like Figures 1-6 As shown, the working principle of this utility model is as follows: First, the projection weld bolt is strongly bonded by the first-sequence strong-binding mold 1; then, the projection weld bolt is pre-upset by the second-sequence pre-upsetting mold 2; then, the projection weld bolt is secondarily upset by the third-sequence head secondary upsetting mold 3; then, the projection weld bolt is head-shaped by the fourth-sequence head forming mold 4; then, the projection weld bolt is trimmed and extruded by the fifth-sequence trimming and extrusion mold 5; finally, the projection weld bolt is chamfered by the sixth-sequence chamfering forming mold 6. No additional machining or chamfering is required, achieving one-time forming. Since the fifth-sequence trimming and extrusion are formed simultaneously, the mold needs to adopt a material receiving structure. Also, considering the short bolt shank and the need for clamp transfer through the mold, the chamfering is formed separately in the sixth-sequence.

[0031] The cold heading process eliminates the need for machining and chamfering, allowing for one-step forming directly in the cold heading stage. This improvement not only significantly simplifies the production process and increases efficiency but also reduces costs. By eliminating the additional machining and chamfering steps, it reduces the investment of manpower, resources, and time, lowering equipment operating and maintenance costs. Furthermore, the one-step forming process improves product quality stability and consistency, reducing errors and defects that might arise from multiple processes.

[0032] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A cold heading die structure for projection weld bolts, characterized in that, It includes: The pier head pretreatment mold, the five sequence edge cutting extrusion hole mold and the six sequence chamfer forming mold, the five sequence edge cutting extrusion hole mold includes five sequence punch and five sequence main mold, the five sequence punch includes five sequence punch shell, punch pad point, punch pad block, punch pin and edge cutting punch, which are sequentially arranged in the inside of the five sequence punch shell, the punch pin sequentially passes through the punch pad point, the punch pad block to the inside of the edge cutting punch, the five sequence main mold includes five sequence main mold shell, five sequence main mold bolt, five sequence main mold core and five sequence main mold piece, the five sequence main mold piece is arranged on the inside of the upper side of the five sequence main mold shell, the five sequence main mold core is arranged in the inside of the five sequence main mold shell, the five sequence main mold bolt is arranged at the lower end of the five sequence main mold shell, the main mold extrusion pin is arranged on the right side of the five sequence main mold core, the main mold extrusion pin is arranged upwards through the five sequence main mold piece, the five sequence main mold bolt, the five sequence main mold core and the five sequence main mold piece are sequentially provided with five sequence main mold pin channels, the six sequence chamfer forming mold includes six sequence punch and six sequence main mold, the inside of the lower end of the six sequence punch is provided with six sequence punch piece, and the inside of the upper end of the six sequence main mold is provided with six sequence main mold piece.

2. A cold heading die structure for a projection-welded bolt according to claim 1, characterized by The pier head pretreatment mold includes a sequence of strong beam mold, two sequence pre-header mold, three sequence head secondary upsetting mold and four sequence head forming mold.

3. A cold heading die structure for a projection-welded bolt according to claim 2, characterized in that, The one sequence strong beam mold includes one sequence punch and one sequence main mold, the inside of the lower end of the one sequence punch is provided with one sequence punch piece, and the inside of the one sequence punch is provided with punch one through the one sequence punch piece, the inside of the upper end of the one sequence main mold is provided with one sequence main mold piece.

4. A cold heading die structure for a projection-welded bolt according to claim 2, characterized by The two sequence pre-header mold includes two sequence punch and two sequence main mold, the inside of the lower end of the two sequence punch is provided with two sequence punch piece, the inside of the two sequence punch is provided with punch two through the two sequence punch piece, and the inside of the upper end of the two sequence main mold is provided with two sequence main mold piece.

5. A cold heading die structure for a projection-welded bolt according to claim 2, wherein The three sequence head secondary upsetting mold includes three sequence punch and three sequence main mold, the inside of the lower end of the three sequence punch is provided with three sequence punch piece, and the inside of the upper end of the three sequence main mold is provided with three sequence main mold piece.

6. A cold heading die structure for a projection-welded bolt according to claim 2, wherein The four sequence head forming mold includes four sequence punch and four sequence main mold, the inside of the lower end of the four sequence punch is provided with four sequence punch piece, and the inside of the upper end of the four sequence main mold is provided with four sequence main mold piece.

Images