Stamping die for internal plum blossom bolt and machining method of stamping die

Abstract

The invention discloses a stamping die for an inner plum blossom bolt and a machining method of the stamping die, and relates to the technical field of bolt machining. According to the technical scheme, the stamping die is characterized by comprising a fixed die and a stamping die, a positioning hole is formed in the top of the fixed die, a stamping cavity is formed in the bottom of the stamping die, a groove penetrating through the top of the stamping die is formed in the stamping die, the groove is communicated with the stamping cavity, and a stamping needle sleeve is arranged in the stamping cavity in a penetrating and sliding mode. A punching needle groove penetrating through the two ends of the punching needle sleeve is formed in the punching needle sleeve in the length direction of the punching needle sleeve, a punching needle body is arranged in the punching needle groove in a penetrating and sliding connection mode, a first lining is arranged at the bottom of the groove, and a positioning assembly for positioning the punching needle sleeve and the punching needle body is further arranged in the groove. An adjusting assembly used for adjusting the height position of the first bush is further arranged on the stamping die. The invention aims to provide a stamping die for an inner plum blossom bolt and a machining method of the stamping die.

Description

Technical Field

[0001] The invention relates to bolt processing technology, and more particularly to a punching die for a torx bolt and a processing method thereof. Background Art

[0002] The internal plum blossom thread (such as plum blossom groove, hexagonal flange thread, etc.) is a non-standard thread structure widely used in high-precision mechanical connections. Its cross-section is a multi-petal plum blossom shape, with the characteristics of high torque resistance, excellent anti-loosening performance, and strong repeated assembly reliability. It is widely used in automobile manufacturing, aerospace, precision instruments and high-end equipment manufacturing.

[0003] When processing the bolts shown in Figure 10, the flanges are generally processed by cutting flanges and cutting washers, but this can easily lead to waste products, thereby increasing production costs.

[0004] Therefore, a new technical solution is urgently needed to solve the above technical problems. Summary of the invention

[0005] In view of the deficiencies in the prior art, an object of the present invention is to provide a stamping die for a torx bolt and a processing method thereof.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: a stamping die for internal hexagonal bolts, characterized in that: it includes a fixed die and a punching die, the top of the fixed die is provided with a positioning hole, the bottom of the punching die is provided with a punching cavity, the punching die is provided with a groove running through the top thereof, the groove is connected to the punching cavity, a punching needle sleeve is penetrated and slidably connected in the punching cavity, the punching needle sleeve is provided with a punching needle groove running through both ends thereof along its length direction, a punching needle body is penetrated and slidably connected in the punching needle groove, a first bushing is provided at the bottom of the groove, a positioning component for positioning the punching needle sleeve and the punching needle body is also provided in the groove, and an adjustment component for adjusting the height position of the first bushing is also provided on the punching die.

[0007] The present invention is further configured as follows: the positioning assembly includes a hole-protecting pad block slidably connected to the groove, the bottom of which abuts against the first bushing, the hole-protecting pad block is provided with a through groove for the punching needle body to pass through, a three-needle pad block is arranged above the hole-protecting pad block in the groove, the bottom of the three-needle pad abuts against the hole-protecting pad, a second bushing is also arranged above the three-needle pad in the groove, and the positioning assembly also includes a positioning piece for positioning the second bushing.

[0008] The present invention is further configured as follows: the positioning piece is specifically a positioning sleeve arranged in the groove, the outer surface of the positioning sleeve is provided with a first external thread, the inner wall of the groove is provided with a first internal thread matching the first external thread, and the bottom of the positioning sleeve abuts against the top of the second bushing.

[0009] The present invention is further configured as follows: a limiting groove is provided at the top of the through groove of the hole protection pad, the diameter of the limiting groove is larger than the diameter of the through groove, a limiting block inserted in the limiting groove is provided at the top of the punch needle body, and the bottom of the three-needle pad abuts against the top of the punch needle and the hole protection pad.

[0010] The present invention is further configured as follows: the hole protection pad and the three-needle pad are provided with three-needle grooves running through the upper and lower surfaces thereof, a three-needle body is passed through and slidably connected in the three-needle groove, the bottom end of the three-needle body is fixedly connected to the punch needle sleeve, a die pad is slidably connected in the second bushing and the positioning sleeve, the bottom of the die pad is fixedly connected to the three-needle body, and also includes a driving member for pushing the die pad.

[0011] The present invention is further configured as follows: the adjustment component includes an adjustment sleeve sleeved on the outer side wall of the die, the circumferential side wall of the adjustment sleeve is provided with a second internal thread, the outer surface of the die is provided with a second external thread matched with the second internal thread, the die is provided with a plurality of adjustment grooves along the outer surface along its circumferential direction, an adjustment block is slidably connected in the adjustment groove, and a symmetrically arranged first inclined surface is provided at both ends of the adjustment groove, the inner wall bottom of the adjustment sleeve is provided with a second inclined surface along its circumferential direction, the second inclined surface abuts against the first inclined surface of the adjustment block extending out of the die, the outer wall bottom of the first bushing is provided with a third inclined surface along its circumferential direction, and the third inclined surface abuts against the first inclined surface at the other end of the adjustment block. The present invention is further configured as follows: a connecting ring is provided along the circumferential side of the outer side wall top of the positioning sleeve.

[0012] The present invention is further configured such that: the outer side wall of the adjustment sleeve is provided with anti-slip stripes.

[0013] A method for processing an internal hexagonal bolt according to the stamping equipment comprises the following steps: S1, selecting corresponding processing raw materials according to the model of the processed product, and processing them through a cold heading machine to obtain a semi-finished bolt product; S2, adjusting the height position of the first bushing through an adjusting component according to the model of the processed product, and positioning and fixing the punch die through a positioning component; S3, inserting the bottom end of the semi-finished bolt product in step S1 into the positioning hole of the fixed die, and driving the punch die to move toward the fixed die through a driving device, and stamping the top of the semi-finished bolt product; S4, the driving device drives the punch die away from the fixed die, and at the same time the driving part pushes the punch die pad, driving the three-needle body and the punch needle sleeve to move downward relative to the punch die, so that the stamped bolt is separated from the punch die; S5, taking the stamped bolt out of the fixed die for blanking.

[0014] The present invention has the following beneficial effects: during stamping, the nut portion of the bolt is placed in the punching cavity, the punching needle sleeve and the bottom end of the punching needle body punch the top of the nut, and a plum blossom-shaped punch is provided at the end of the punching needle body to form a plum blossom groove at the top of the nut. During the processing, the height position of the first bushing can be adjusted by adjusting the assembly according to the specifications of the bolts to be processed, and the punching needle sleeve and the punching needle body can be positioned by the positioning assembly so that nuts of different thickness specifications can be stamped, thereby improving the processing range, being able to stamp bolts of various specifications, and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the three-dimensional structure of this embodiment;

[0016] Figure 2 This is a schematic diagram of a half-section structure of this embodiment;

[0017] Figure 3 Schematic diagram of the cross-sectional structure of the punching die of this embodiment;

[0018] Figure 4 This is a schematic diagram of the structure of the positioning sleeve of this embodiment;

[0019] Figure 5 This is a schematic diagram of the structure of the hole protection pad block of this embodiment;

[0020] Figure 6 Schematic diagram of the structure of the punch body of this embodiment;

[0021] Figure 7 This is a schematic diagram of the structure of the adjustment sleeve of this embodiment;

[0022] Figure 8 This is a schematic diagram of the structure of the adjustment block of this embodiment;

[0023] Fig. 9 is a schematic structural diagram of the first bushing in this embodiment;

[0024] Fig.10 This is a schematic diagram of the structure of the processed bolts.

[0025] Description of the drawings: 1. Fixed mold; 2. Punch die; 3. Positioning hole; 4. Punch cavity; 5. Groove; 6. Punch needle sleeve; 7. Punch needle body; 8. First bushing; 9. Hole protection pad; 10. Three-needle pad; 11. Second bushing; 12. Positioning sleeve; 13. First external thread; 14. First internal thread; 15. Through groove; 16. Limit groove; 17. Limit block; 18. Three-needle body; 19. Punch die pad; 20. Adjusting sleeve; 21. Second internal thread; 22. Second external thread; 23. Adjusting groove; 24. Adjusting block; 25. First inclined surface; 26. Second inclined surface; 27. Third inclined surface; 28. Connecting ring. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0027] The same parts are denoted by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0028] like Figure 1-9 As shown, a stamping die for an internal hexagonal bolt comprises a fixed die (1) and a punching die (2), wherein a positioning hole (3) is provided at the top of the fixed die (1), a punching cavity (4) is provided at the bottom of the punching die (2), a groove (5) penetrating the top of the punching die (2), the groove (5) being connected to the punching cavity (4), a punching needle sleeve (6) being provided in the punching cavity (4) and being slidably connected thereto, the punching needle sleeve (6) being provided with a punching needle groove penetrating both ends thereof along its length direction, a punching needle body (7) being provided in the punching needle groove and being slidably connected thereto, a first bushing (8) being provided at the bottom of the groove (5), a positioning component for positioning the punching needle sleeve (6) and the punching needle body (7) being further provided in the groove (5), and an adjusting component for adjusting the height position of the first bushing (8) being further provided on the punching die (2).

[0029] During punching, the nut portion of the bolt is placed in the punching cavity (4), and the bottom ends of the punching needle sleeve (6) and the punching needle body (7) punch the top of the nut. The end of the punching needle body (7) is provided with a plum blossom-shaped punch (not shown in the figure) for forming a plum blossom groove at the top of the nut and forming a flange by punching. During the processing, the height position of the first bushing (8) can be adjusted by adjusting the assembly according to the specifications of the bolt to be processed, and the punching needle sleeve (6) and the punching needle body (7) can be positioned by the positioning assembly, so as to punch nuts of different thickness specifications, thereby increasing its processing range, being able to punch bolts of various specifications, and reducing production costs.

[0030] The positioning assembly includes a hole-protecting pad (9) slidably connected to the groove (5), the bottom of which abuts against the first bushing (8), the hole-protecting pad (9) is provided with a through groove (15) for the punching needle body (7) to pass through, a three-needle pad (10) is arranged above the hole-protecting pad (9) in the groove (5), the bottom of the three-needle pad (10) abuts against the hole-protecting pad (9), a second bushing (11) is also arranged above the three-needle pad (10) in the groove (5), and the positioning assembly also includes a positioning member for positioning the second bushing (11).

[0031] The positioning member is specifically a positioning sleeve (12) arranged in the groove (5), the outer surface of the positioning sleeve (12) is provided with a first external thread (13), the inner wall of the groove (5) is provided with a first internal thread (14) matched with the first external thread (13), and the bottom of the positioning sleeve (12) abuts against the top of the second bushing (11).

[0032] By tightening the positioning sleeve (12), the positioning sleeve (12) is pressed against the second bushing (11), and the hole protection pad (9) is pressed against the first bushing (8). During the punching process, the punching needle sleeve (6) is pressed against the hole protection pad (9), and the top of the punching needle body (7) is pressed against the three-needle pad (10), thereby ensuring the stability of the punching needle sleeve (6) and the punching needle body (7) during the processing.

[0033] The hole protection pad (9) is provided with a limiting groove (16) at the top of the through groove (15), the diameter of the limiting groove (16) is larger than the diameter of the through groove (15), the top of the punch needle body (7) is provided with a limiting block (17) inserted into the limiting groove (16), and the bottom of the three-needle pad (10) abuts against the top of the punch needle body (7) and the hole protection pad (9). During installation, the punch needle body (7) is inserted into the through groove (15) from top to bottom, and finally the limiting block (17) is placed in the limiting groove (16), so as to further improve the stability of the punch needle body (7).

[0034] The hole-protecting pad (9) and the three-needle pad (10) are provided with three-needle grooves penetrating the upper and lower surfaces thereof, and a three-needle body (18) is arranged and slidably connected in the three-needle grooves, and the bottom end of the three-needle body (18) is fixedly connected to the punching needle sleeve (6), and a die pad (19) is slidably connected in the second bushing (11) and the positioning sleeve (12), and the bottom of the die pad (19) is fixedly connected to the three-needle body (18), and also includes a driving member (cylinder, not shown in the figure) for pushing the die pad (19). After the punching is completed, the die pad (19) is pushed by the driving member, so that under the action of the three-needle body (18), the punching needle sleeve (6) is driven to move downward relative to the die (2), and the punched bolt is pushed to separate from the punching cavity (4), so as to facilitate the blanking.

[0035] The adjusting component comprises an adjusting sleeve (20) sleeved on the outer wall of the punch (2); the circumferential side wall of the adjusting sleeve (20) is provided with a second internal thread (21); the outer surface of the punch (2) is provided with a second external thread (22) matched with the second internal thread (21); the punch (2) is provided with a plurality of adjusting grooves (23) along the circumferential direction of the outer surface; an adjusting block (24) is slidably connected in the adjusting groove (23); symmetrical first inclined surfaces (25) are provided at both ends of the adjusting block; a second inclined surface (26) is provided at the bottom of the inner wall of the adjusting sleeve (20) along the circumferential direction; the second inclined surface (26) abuts against the first inclined surface (25) of one end of the adjusting block (24) extending out of the outer side of the punch (2); a third inclined surface (27) is provided at the bottom of the outer wall of the first bushing (8) along the circumferential direction; the third inclined surface (27) abuts against the first inclined surface (25) at the other end of the adjusting block (24).

[0036] When processing bolts of different specifications and needing to adjust the height of the first bushing (8), first loosen the positioning sleeve (12) to raise its height, then rotate the adjusting sleeve (20) to adjust its height position, and drive the height of the first bushing (8) to change synchronously through the inclined transmission of the adjusting block (24), and finally tighten the positioning sleeve (12) to complete the adjustment.

[0037] A connecting ring (28) is arranged at the top of the outer wall of the position sleeve (12) along its circumference to facilitate the rotation operation; and an anti-slip stripe (not numbered in the figure) is arranged on the outer wall of the adjustment sleeve (20) to enhance the friction force.

[0038] A method for processing a torx bolt using the above-mentioned stamping equipment comprises the following steps:

[0039] S1. According to the model of the processed product, the corresponding processing raw materials are selected and processed by a cold heading machine to obtain a semi-finished bolt product;

[0040] S2. According to the model of the processed product, the height position of the first bushing is adjusted by the adjusting component, and the die is positioned and fixed by the positioning component;

[0041] S3, inserting the bottom end of the semi-finished bolt in step S1 into the positioning hole of the fixed die, and driving the punching die toward the fixed die through the driving device to stamp the top of the semi-finished bolt;

[0042] S4, the driving device drives the punch die away from the fixed die, and at the same time the driving member pushes the punch die pad, driving the three-needle body and the punch needle sleeve to move downward relative to the punch die, so that the punched bolt is separated from the punch die;

[0043] S5. Take out the punched bolts from the fixed die.

[0044] The specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, such modifications are protected by the patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A stamping die for a torx bolt, characterized in that: The invention comprises a fixed die (1) and a punching die (2), wherein a positioning hole (3) is provided at the top of the fixed die (1), a punching cavity (4) is provided at the bottom of the punching die (2), a groove (5) penetrating the top of the punching die (2), the groove (5) being connected to the punching cavity (4), a punching needle sleeve (6) being provided in the punching cavity (4) and being slidably connected thereto, the punching needle sleeve (6) being provided with a punching needle groove penetrating both ends thereof along its length direction, a punching needle body (7) being provided in the punching needle groove and being slidably connected thereto, a first bushing (8) being provided at the bottom of the groove (5), a positioning component (9-12) for positioning the punching needle sleeve (6) and the punching needle body (7) being further provided in the groove (5), and an adjusting component for adjusting the height position of the first bushing (8) being further provided on the punching die (2).

2. A stamping die for a torx bolt according to claim 1, characterized in that: The positioning assembly includes a hole-protecting pad (9) slidably connected to the groove (5), and the bottom of the hole-protecting pad is abutted against the first bushing (8). The hole-protecting pad (9) is provided with a through groove (15) for the punching needle body (7) to pass through. A three-needle pad (10) is arranged above the hole-protecting pad (9) in the groove (5), and the bottom of the three-needle pad (10) abuts against the hole-protecting pad (9). A second bushing (11) is also arranged above the three-needle pad (10) in the groove (5). The positioning assembly also includes a positioning member (12) for positioning the second bushing (11).

3. A stamping die for a torx bolt according to claim 2, characterized in that: The positioning member is specifically a positioning sleeve (12) arranged in the groove (5), the outer surface of the positioning sleeve (12) is provided with a first external thread (13), the inner wall of the groove (5) is provided with a first internal thread (14) matched with the first external thread (13), and the bottom of the positioning sleeve (12) abuts against the top of the second bushing (11).

4. A stamping die for a torx bolt according to claim 2, characterized in that: The hole-protecting pad block (9) is provided with a limiting groove (16) at the top of the through groove (15), the diameter of the limiting groove (16) is larger than the diameter of the through groove (15), the top of the punching needle body (7) is provided with a limiting block (17) inserted into the limiting groove (16), and the bottom of the three-needle pad block (10) abuts against the top of the punching needle body (7) and the hole-protecting pad block (9).

5. A stamping die for a torx bolt according to claim 4, characterized in that: The hole protection pad (9) and the three-needle pad (10) are provided with three-needle grooves penetrating the upper and lower surfaces thereof, a three-needle body (18) is inserted into and slidably connected to the three-needle groove, the bottom end of the three-needle body (18) is fixedly connected to the punch needle sleeve (6), the second bushing (11) and the positioning sleeve (12) are slidably connected to a die pad (19), the bottom of the die pad (19) is fixedly connected to the three-needle body (18), and also includes a driving member for pushing the die pad (19).

6. A stamping die for a torx bolt according to claim 5, characterized in that: The adjustment component comprises an adjustment sleeve (20) sleeved on the outer wall of the die (2); the circumferential side wall of the adjustment sleeve (20) is provided with a second internal thread (21); the outer surface of the die (2) is provided with a second external thread (22) matched with the second internal thread (21); the die (2) is provided with a plurality of adjustment grooves (23) along the circumferential direction of the outer surface; an adjustment block (24) is slidably connected in the adjustment groove (23); symmetrical first inclined surfaces (25) are provided at both ends of the adjustment block; a second inclined surface (26) is provided at the bottom of the inner wall of the adjustment sleeve (20) along the circumferential direction; the second inclined surface (26) abuts against the first inclined surface (25) of one end of the adjustment block (24) extending out of the outer side of the die (2); a third inclined surface (27) is provided at the bottom of the outer wall of the first bushing (8) along the circumferential direction; the third inclined surface (27) abuts against the first inclined surface (25) at the other end of the adjustment block (24).

7. A stamping die for a torx bolt according to claim 6, characterized in that: A connecting ring (28) is arranged at the top of the outer side wall of the positioning sleeve (12) along its circumference.

8. The punching device according to claim 7, characterized in that: The outer side wall of the adjustment sleeve (20) is provided with anti-slip stripes.

9. A method for processing a hexagonal bolt of a punching device according to claims 1-8, characterized in that: The steps include: S1. According to the model of the processed product, the corresponding processing raw materials are selected and processed by a cold heading machine to obtain a semi-finished bolt, forming a nut and a screw part; S2. According to the model of the processed product, the height position of the first bushing is adjusted by the adjusting component, and the die is positioned and fixed by the positioning component; S3, inserting the bottom end of the semi-finished bolt in step S1 into the positioning hole of the fixed die, and driving the punching die toward the fixed die through the driving device to stamp the top of the semi-finished bolt; S4, the driving device drives the punch die away from the fixed die, and at the same time the driving member pushes the punch die pad, driving the three-needle body and the punch needle sleeve to move downward relative to the punch die, so that the punched bolt is separated from the punch die; S5. Take out the punched bolts from the fixed die.

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