Cold heading die structure of double-end welding screw

Abstract

The utility model relates to the field of cold heading dies, in particular to a cold heading die structure of a double-headed welding screw rod, which comprises a first-order shaping die, a second-order strong beam die, a third-order shaping die and a fourth-order finished product die. The first-order shaping die comprises a first-order upper die and a first-order lower die, the first-order lower die comprises a first-order lower die shell, a first-order lower die core is arranged in the first-order lower die shell, a first machining channel with a through upper end and an arc-shaped bottom is arranged in the first-order lower die core, and a first-order lower die ejector pin is arranged at the lower end of the first machining channel in a penetrating mode; the second-order strong beam die comprises a second-order upper die and a second-order lower die, the second-order upper die comprises a second-order upper die shell, a second-order upper die rear pad is arranged at the upper end in the second-order upper die shell, a second-order upper die core is arranged at the lower end in the second-order upper die shell, a second-order upper die punching rod is arranged at the lower end of the second-order upper die rear pad, and the second-order upper die punching rod penetrates through the second-order upper die core; a concave round pressing groove is formed in the bottom of the second-order upper die punching rod, the head angle is fuller, and an ideal dip angle is obtained.

Description

Technical Field

[0001] This utility model relates to the field of cold heading dies, and specifically to a cold heading die structure with a double-headed welded screw. Background Technology

[0002] In current production practices, the significant difference between the head diameter and the rod diameter of the double-ended welded screw results in the blank diameter exceeding the suitable range for the rod, making it difficult for the rod to achieve the desired molding effect during the forming process. Simultaneously, the shape of the double-ended welded screw head is also difficult to achieve the ideal fullness, which not only severely impacts production efficiency but also adversely affects product quality.

[0003] Therefore, in order to overcome the shortcomings of the existing technology, it is necessary to design a cold heading die structure with a simple double-headed welded screw. Utility Model Content

[0004] To address the problems of the prior art, this utility model provides a cold heading die structure for a double-headed welded screw.

[0005] The purpose of this utility model can be achieved through the following technical solution: A cold heading mold structure for a double-headed welding screw includes a first-order shaping mold, a second-order strong-binding mold, a third-order shaping mold and a fourth-order finished product mold arranged in sequence;

[0006] The first-order shaping mold includes a first-order upper mold and a first-order lower mold. The first-order lower mold includes a first-order lower mold shell. The first-order lower mold shell is provided with a first-order lower mold core. The first-order lower mold core is provided with a processing channel that is open at the top and arc-shaped at the bottom. A first-order lower mold ejector pin is provided through the bottom of the processing channel.

[0007] The second-order strong beam mold includes a second-order upper mold and a second-order lower mold. The second-order upper mold includes a second-order upper mold shell. A second-order upper mold rear pad is provided at the upper end of the interior of the second-order upper mold shell. A second-order upper mold core is provided at the lower end of the interior of the second-order upper mold shell. A second-order upper mold punch is provided at the lower end of the second-order upper mold rear pad. The second-order upper mold punch penetrates the second-order upper mold core. A concave round pressure groove is provided at the bottom of the second-order upper mold punch.

[0008] The three-stage shaping mold includes a three-stage upper mold and a three-stage lower mold. The three-stage upper mold includes a three-stage upper mold shell, a three-stage upper mold back pad at the upper end of the interior of the three-stage upper mold shell, a three-stage upper mold core at the lower end of the interior of the three-stage upper mold shell, a three-stage upper mold punch at the lower end of the three-stage upper mold back pad, the three-stage upper mold punch penetrating through the three-stage upper mold core, and an inverted conical pressure groove at the bottom of the three-stage upper mold punch. The three-stage lower mold includes a three-stage lower mold shell, a three-stage lower mold inner mold inside the three-stage lower mold shell, a three-stage lower mold core inside the three-stage lower mold core, a stepped processing channel three penetrating through at the upper end, the middle and bottom sections of the stepped processing channel three being conical, and a three-stage lower mold ejector pin penetrating through at the lower end of the processing channel three.

[0009] In a further improvement, the first-order upper mold includes a first-order upper mold shell, a first-order upper mold back pad is provided at the upper end of the first-order upper mold shell, a first-order upper mold core is provided at the lower end of the first-order upper mold shell, a first-order upper mold punch is provided at the lower end of the first-order upper mold back pad, and the first-order upper mold punch penetrates the first-order upper mold core.

[0010] In a further improvement, the second-order lower mold includes a second-order lower mold shell, and a second-order lower mold core is provided inside the second-order lower mold shell. The second-order lower mold core is provided with a second processing channel that is open at the top and arc-shaped in the middle. A second-order lower mold ejector pin is provided through the lower end of the second processing channel.

[0011] In a further improvement, the four-stage finished product mold includes a four-stage upper mold and a four-stage lower mold. The four-stage upper mold includes a four-stage upper mold shell, with a four-stage upper mold back pad at the upper end of the interior of the four-stage upper mold shell and a four-stage upper mold core at the lower end of the interior of the four-stage upper mold shell. A four-stage upper mold punch is provided at the lower end of the four-stage upper mold back pad, and the four-stage upper mold punch penetrates through the four-stage upper mold core. The four-stage lower mold includes a four-stage lower mold shell, with a four-stage lower mold inner mold inside the four-stage lower mold shell. A four-stage lower mold core is provided inside the four-stage lower mold core, with a processing channel four that is open at the upper end and arc-shaped at the bottom. A four-stage lower mold ejector pin is provided through the lower end of the processing channel four.

[0012] In a further improvement, a third-order lower mold nut is provided at the lower end of the third-order lower mold shell in the third-order lower mold.

[0013] A further improvement is that the lower end of the lower mold shell of the lower mold is provided with a lower mold nut.

[0014] Compared with the prior art, the advantages of the cold heading die structure of the double-headed welding screw of this utility model are as follows:

[0015] The first-stage shaping process specifically treats the tail end, forming a small arc shape, which significantly improves the smoothness of the second-stage strong-bundle operation. On the one hand, the ingenious shape design effectively overcomes the molding problem caused by the excessive diameter of the blank, greatly reducing obstacles in the processing. On the other hand, the optimization also provides good protection for the mold, helping to extend the mold's service life, thereby reducing production costs and improving production efficiency. This utility model innovates the head molding process, using a unique three-step molding method to shape the head. Through the close cooperation of these three steps, the head angle is made fuller, achieving an ideal tilt angle. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the first-order shaping mold in this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the second-order strong beam mode in this utility model.

[0018] Figure 3 This is a schematic diagram of the structure of the three-stage shaping mold in this utility model.

[0019] Figure 4 This is a schematic diagram of the structure of the four-stage finished product mold in this utility model.

[0020] In the diagram, 1-first-sequence shaping die, 11-first-sequence upper die, 111-first-sequence upper die shell, 112-first-sequence upper die back pad, 113-first-sequence upper die core, 114-first-sequence upper die punch, 12-first-sequence lower die, 121-first-sequence lower die shell, 122-first-sequence lower die core, 123-machining channel one, 124-first-sequence lower die ejector pin, 2-second-sequence strong binding die, 21-second-sequence upper die... Mold, 211-Second-sequence upper mold shell, 212-Second-sequence upper mold back pad, 213-Second-sequence upper mold core, 214-Second-sequence upper mold punch, 215-Concave round pressure groove, 22-Second-sequence lower mold, 221-Second-sequence lower mold shell, 222-Second-sequence lower mold core, 223-Machining channel two, 224-Second-sequence lower mold ejector pin, 3-Third-sequence shaping mold, 31-Third-sequence upper mold, 311-Third-sequence... Upper die shell, 312-Third-sequence upper die back pad, 313-Third-sequence upper die core, 314-Third-sequence upper die punch, 315-Inverted conical pressure groove, 32-Third-sequence lower die, 321-Third-sequence lower die shell, 322-Third-sequence lower die core, 323-Stepped machining channel three, 324-Third-sequence lower die ejector pin, 325-Third-sequence lower die inner die, 326-Third-sequence lower die nut, 4-Fourth-sequence assembly Mold, 41-Fourth-stage upper mold, 411-Fourth-stage upper mold shell, 412-Fourth-stage upper mold back pad, 413-Fourth-stage upper mold core, 414-Fourth-stage upper mold punch, 42-Fourth-stage lower mold, 421-Fourth-stage lower mold shell, 422-Fourth-stage lower mold core, 423-Machining channel four, 424-Fourth-stage lower mold ejector pin, 425-Fourth-stage lower mold inner mold, 426-Fourth-stage lower mold nut. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] The following is a description of the embodiments and appendices. Figures 1-4 The technical solution of this utility model will be further described below.

[0024] Example 1

[0025] A cold heading die structure for a double-headed welding screw includes a first-order forming die 1, a second-order strong-binding die 2, a third-order forming die 3, and a fourth-order finishing die 4 arranged sequentially.

[0026] The first-order shaping mold 1 includes a first-order upper mold 11 and a first-order lower mold 12. The first-order lower mold 12 includes a first-order lower mold shell 121. The first-order lower mold shell 121 is provided with a first-order lower mold core 122. The first-order lower mold core 122 is provided with a processing channel 123 that is open at the top and arc-shaped at the bottom. The lower end of the processing channel 123 is provided with a first-order lower mold ejector pin 123.

[0027] The second-order strong beam mold 2 includes a second-order upper mold 21 and a second-order lower mold 22. The second-order upper mold 21 includes a second-order upper mold shell 211. The upper end of the second-order upper mold shell 211 is provided with a second-order upper mold back pad 212. The lower end of the second-order upper mold shell 211 is provided with a second-order upper mold core 213. The lower end of the second-order upper mold back pad 212 is provided with a second-order upper mold punch 214. The second-order upper mold punch 214 penetrates the second-order upper mold core 213. The bottom of the second-order upper mold punch 214 is provided with a concave round pressure groove 215.

[0028] The three-stage shaping mold 3 includes a three-stage upper mold 31 and a three-stage lower mold 32. The three-stage upper mold 31 includes a three-stage upper mold shell 311. A three-stage upper mold back pad 312 is provided at the upper end of the interior of the three-stage upper mold shell 311. A three-stage upper mold core 313 is provided at the lower end of the interior of the three-stage upper mold shell 311. A three-stage upper mold punch 314 is provided at the lower end of the three-stage upper mold back pad 312. The three-stage upper mold punch 314 penetrates the three-stage upper mold core 313. The bottom of the three-stage upper mold punch 314... The mold is provided with an inverted conical groove 315; the three-stage lower mold 32 includes a three-stage lower mold shell 321, a three-stage lower mold inner mold 325 is provided inside the three-stage lower mold shell 321, a three-stage lower mold core 322 is provided inside the three-stage lower mold inner mold 325, a three-stage lower mold core 322 is provided inside the three-stage lower mold core 322, a stepped processing channel 323 with the upper end through it, the middle and bottom sections of the stepped processing channel 323 are conical, and a three-stage lower mold ejector pin 324 is provided through the lower end of the processing channel 323.

[0029] As a further preferred embodiment, the first-order upper mold 11 includes a first-order upper mold shell 111, a first-order upper mold back pad 112 is provided at the upper end of the first-order upper mold shell 111, a first-order upper mold core 113 is provided at the lower end of the first-order upper mold shell 111, and a first-order upper mold punch 114 is provided at the lower end of the first-order upper mold back pad 112, the first-order upper mold punch 114 penetrating through the first-order upper mold core 113.

[0030] As a further preferred embodiment, the second-order lower mold 22 includes a second-order lower mold shell 221, and a second-order lower mold core 222 is provided inside the second-order lower mold shell 221. The second-order lower mold core 222 is provided inside the second-order lower mold core 223, which is open at the upper end and arc-shaped in the middle. A second-order lower mold ejector pin 224 is provided through the lower end of the second-order lower mold core 223.

[0031] As a further preferred embodiment, the four-stage finished product mold 4 includes a four-stage upper mold 41 and a four-stage lower mold 42. The four-stage upper mold 41 includes a four-stage upper mold shell 411. A four-stage upper mold back pad 412 is provided at the upper end of the interior of the four-stage upper mold shell 411. A four-stage upper mold core 413 is provided at the lower end of the interior of the four-stage upper mold shell 411. A four-stage upper mold punch 414 is provided at the lower end of the four-stage upper mold back pad 412. The four-stage upper mold punch 414 penetrates the four-stage upper mold core 413.

[0032] The fourth-order lower mold 42 includes a fourth-order lower mold shell 421, a fourth-order lower mold inner mold 425 inside the fourth-order lower mold shell 421, a fourth-order lower mold core 422 inside the fourth-order lower mold inner mold 425, a fourth-order lower mold core 422 inside the fourth-order lower mold core 422, a processing channel 423 with a through upper end and an arc-shaped bottom inside the fourth-order lower mold core 422, and a fourth-order lower mold ejector pin 424 passing through the lower end of the processing channel 423.

[0033] As a further preferred embodiment, the lower end of the lower mold shell 321 in the lower mold 32 is provided with a lower mold nut 326.

[0034] As a further preferred embodiment, the lower end of the fourth-order lower mold shell 421 in the fourth-order lower mold 42 is provided with a fourth-order lower mold nut 426.

[0035] like Figures 1-4 As shown, the working principle of this utility model is as follows:

[0036] The specific production process is as follows: raw material → first-stage shaping → second-stage strong binding → third-stage shaping → fourth-stage finished product.

[0037] The first-order shaping is carried out by the first-order shaping mold: the bottom of the processing channel 123 that runs through the upper end of the first-order lower mold core 122 is arc-shaped, so that the tail of the blank forms a small arc after the blank is initially processed.

[0038] The second-order strong binding is performed by the second-order strong binding mold: the bottom of the second-order upper die punch 214 is provided with a concave round pressure groove 215. The punch is processed into a concave round shape to shape the head of the blank so that the head can be formed later. At the same time, the upper end of the processing channel 223 inside the second-order lower die core 222 is open and the middle part is an arc-shaped processing channel 223 to bind out the straight rod part.

[0039] The three-stage shaping process is carried out through the three-stage shaping die: the head is further processed by punching out the head shape through the inverted conical groove 315 at the bottom of the upper die punch 314, and the upper end of the stepped processing channel 323 inside the lower die core 322 is chamfered because the middle and bottom sections of the stepped processing channel 323 are conical, so that the tail of the blank straight rod is chamfered, and the rod is initially formed.

[0040] The four-stage finished product is produced by using a four-stage finished product mold: after the final process, the product is completed and the final finished product is obtained.

[0041] During processing, the first-stage shaping process specifically treats the tail end, shaping it into a small arc to significantly improve the smoothness of the second-stage strong-bundle operation. On one hand, the ingenious shape design effectively overcomes the molding difficulties caused by the excessive diameter of the blank, greatly reducing obstacles in the processing; on the other hand, the optimization also provides good protection for the mold, helping to extend its service life, thereby reducing production costs and improving production efficiency.

[0042] This invention innovates the head forming process by using a unique three-step forming method to shape the head. Through the close cooperation of these three steps, the head angle is made fuller and an ideal tilt angle is obtained.

[0043] 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 a double-headed welded screw rod, characterized by, The die set comprises a first-order shaping die, a second-order strong binding die, a third-order shaping die and a fourth-order finished product die arranged in sequence. The first-order shaping die comprises a first-order upper die and a first-order lower die, the first-order lower die comprises a first-order lower die shell, a first-order lower die core is arranged inside the first-order lower die shell, a processing channel one with a through upper end and a circular arc bottom is arranged inside the first-order lower die core, and a first-order lower die ejector pin is arranged through the lower end of the processing channel one. The second-order strong binding die comprises a second-order upper die and a second-order lower die, the second-order upper die comprises a second-order upper die shell, a second-order upper die rear pad is arranged inside the upper end of the second-order upper die shell, a second-order upper die core is arranged inside the lower end of the second-order upper die shell, a second-order upper die punch rod is arranged at the lower end of the second-order upper die rear pad, the second-order upper die punch rod penetrates the second-order upper die core, and a concave circular pressing groove is arranged at the bottom of the second-order upper die punch rod. The third-order shaping die comprises a third-order upper die and a third-order lower die, the third-order upper die comprises a third-order upper die shell, a third-order upper die rear pad is arranged inside the upper end of the third-order upper die shell, a third-order upper die core is arranged inside the lower end of the third-order upper die shell, a third-order upper die punch rod is arranged at the lower end of the third-order upper die rear pad, the third-order upper die punch rod penetrates the third-order upper die core, and an inverted conical pressing groove is arranged at the bottom of the third-order upper die punch rod; the third-order lower die comprises a third-order lower die shell, a third-order lower die inner die is arranged inside the third-order lower die shell, a third-order lower die core is arranged inside the third-order lower die inner die, a stepped processing channel three with a through upper end is arranged inside the third-order lower die core, the middle and bottom sections of the stepped processing channel three are conical, and a third-order lower die ejector pin is arranged through the lower end of the processing channel three.

2. A cold heading die structure for double-end welded stud according to claim 1, wherein The first-order upper die comprises a first-order upper die shell, a first-order upper die rear pad is arranged inside the upper end of the first-order upper die shell, a first-order upper die core is arranged inside the lower end of the first-order upper die shell, a first-order upper die punch rod is arranged at the lower end of the first-order upper die rear pad, and the first-order upper die punch rod penetrates the first-order upper die core.

3. A cold heading die structure for double-end welded stud according to claim 1, wherein The second-order lower die comprises a second-order lower die shell, a second-order lower die core is arranged inside the second-order lower die shell, a processing channel two with a through upper end and a circular arc middle section is arranged inside the second-order lower die core, and a second-order lower die ejector pin is arranged through the lower end of the processing channel two.

4. A cold heading die structure for double-end welded stud according to claim 1, wherein The fourth-order finished product die comprises a fourth-order upper die and a fourth-order lower die, the fourth-order upper die comprises a fourth-order upper die shell, a fourth-order upper die rear pad is arranged inside the upper end of the fourth-order upper die shell, a fourth-order upper die core is arranged inside the lower end of the fourth-order upper die shell, a fourth-order upper die punch rod is arranged at the lower end of the fourth-order upper die rear pad, and the fourth-order upper die punch rod penetrates the fourth-order upper die core; the fourth-order lower die comprises a fourth-order lower die shell, a fourth-order lower die inner die is arranged inside the fourth-order lower die shell, a fourth-order lower die core is arranged inside the fourth-order lower die inner die, a processing channel four with a through upper end and a circular arc bottom is arranged inside the fourth-order lower die core, and a fourth-order lower die ejector pin is arranged through the lower end of the processing channel four.

5. A cold heading die structure for double-end welded stud according to claim 1, wherein The third-order lower die shell of the third-order lower die is provided with a third-order lower die nut at the lower end.

6. A cold heading die structure for double-end welded stud according to claim 4, wherein The fourth-order lower die shell of the fourth-order lower die is provided with a fourth-order lower die nut at the lower end.

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