A stamping die for internal plum blossom bolts and its processing method

Abstract

The present invention discloses a stamping die for an internal plum blossom bolt and a processing method thereof, which relates to the technical field of bolt processing. The key points of its technical solution are: including a fixed die and a punching die, a positioning hole is opened at the top of the fixed die, a punching cavity is opened at the bottom of the punching die, a groove penetrating through the top of the punching die is opened, the groove communicates with the punching cavity, a punch sleeve is penetrated and slidably connected in the punching cavity, a punch needle groove penetrating through both ends along the length direction of the punch sleeve is opened, a punch needle body is penetrated and slidably connected in the punch needle groove, a first bushing is arranged at the bottom of the groove, a positioning component for positioning the punch sleeve and the punch needle body is further arranged in the groove, and an adjusting component for adjusting the height position of the first bushing is further arranged on the punching die. The purpose of the present invention is to provide a stamping die for an internal plum blossom bolt and a processing method thereof.

Description

Technical Field

[0001] The invention relates to bolt processing technology, and more specifically, 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 such that: the positioning member is specifically a positioning sleeve disposed in the groove, a first external thread is provided on the outer surface of the positioning sleeve, a first internal thread adapted to the first external thread is provided on the inner sidewall of the groove, and the bottom of the positioning sleeve abuts against the top of the second bushing.

[0009] The present invention is further configured such that: 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 into the limiting groove is provided at the top end of the punch body, and the bottom of the three-pin pad abuts against the tops of the punch and the hole protection pad.

[0010] The present invention is further configured such that: the hole protection pad and the three-pin pad are provided with three-pin grooves penetrating through their upper and lower surfaces, a three-pin body is inserted and slidably connected in the three-pin grooves, the bottom end of the three-pin body is fixedly connected to the punch sleeve, a die cushion is slidably connected in the second bushing and the positioning sleeve, the bottom of the die cushion is fixedly connected to the three-pin body, and a driving member for pushing the die cushion is further included.

[0011] The present invention is further configured such that: the adjusting assembly includes an adjusting sleeve sleeved on the outer sidewall of the die, a second internal thread is provided on the circumferential sidewall of the adjusting sleeve, a second external thread adapted to the second internal thread is provided on the outer surface of the die, a plurality of adjusting grooves are provided on the outer surface of the die along its circumferential direction, an adjusting block is slidably connected in the adjusting grooves, first inclined surfaces are symmetrically provided at both ends thereof, a second inclined surface is provided on the bottom of the inner wall of the adjusting sleeve along its circumferential direction, the second inclined surface abuts against the first inclined surface at one end of the adjusting block extending out of the outer side of the die, and a third inclined surface is provided on the bottom of the outer wall of the first bushing along its circumferential direction, the third inclined surface abuts against the first inclined surface at the other end of the adjusting block. The present invention is further configured such that: a connecting ring is provided on the top of the outer sidewall of the positioning sleeve along its circumference.

[0012] The present invention is further configured such that: anti-slip stripes are provided on the outer sidewall of the adjusting sleeve.

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

[0024] Figure 10 It is a schematic structural diagram for processing bolts.

[0025] Description of the drawings: 1. Fixed die; 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 implementation manners

[0026] The present invention will be further described in detail below with reference to the drawings.

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

[0028] As Figure 1-9 shown, a stamping die for internal plum blossom bolts includes a fixed die (1) and a punch die (2). A positioning hole (3) is provided at the top of the fixed die (1), a punch cavity (4) is provided at the bottom of the punch die (2), a groove (5) penetrating through the top of the punch die (2) is provided, the groove (5) communicates with the punch cavity (4), a punch needle sleeve (6) is inserted and slidably connected in the punch cavity (4), a punch needle groove penetrating through both ends of the punch needle sleeve (6) along its length direction is provided, a punch needle body (7) is inserted and slidably connected in the punch needle groove, a first bushing (8) is provided at the bottom of the groove (5), and a positioning component for positioning the punch needle sleeve (6) and the punch needle body (7) is further provided in the groove (5). An adjusting component for adjusting the height position of the first bushing (8) is further provided on the punch die (2).

[0029] During stamping, the nut part of the bolt is placed inside the punching cavity (4). The bottom ends of the punch needle sleeve (6) and the punch needle body (7) punch the top of the nut. The end of the punch needle body (7) is provided with a plum blossom-shaped punch head (not shown in the figure) for forming a plum blossom groove on the top of the nut and forming a flange through stamping. During the processing, according to the specifications of the bolts to be processed, the height position of the first bushing (8) can be adjusted through the adjustment component, and the punch needle sleeve (6) and the punch needle body (7) can be positioned through the positioning component, so as to punch nuts with different thickness specifications, improve its processing range, be able to punch and process bolts of various specifications, and reduce production costs.

[0030] The positioning component includes a hole protection cushion block (9) slidably connected inside the groove (5), the bottom of which abuts against the first bushing (8). The hole protection cushion block (9) is provided with a through groove (15) for the punch needle body (7) to pass through. Inside the groove (5) and above the hole protection cushion block (9), there is a three-pin cushion block (10). The bottom of the three-pin cushion block (10) abuts against the hole protection cushion block (9). Inside the groove (5) and above the three-pin cushion block (10), there is also a second bushing (11). The positioning component further includes a positioning part for positioning the second bushing (11).

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

[0032] By tightening the positioning sleeve (12) to make it abut tightly against the second bushing (11), the hole protection cushion block (9) abuts tightly against the first bushing (8). During stamping, the punch needle sleeve (6) abuts tightly against the hole protection cushion block (9), and the top of the punch needle body (7) abuts tightly against the three-pin cushion block (10), thereby ensuring the stability of the punch needle sleeve (6) and the punch needle body (7) during processing.

[0033] The hole protection cushion block (9) is provided with a limit groove (16) at the top of the through groove (15). The diameter of the limit groove (16) is larger than that of the through groove (15). The top end of the punch needle body (7) is provided with a limit block (17) inserted into the limit groove (16). The bottom of the three-pin cushion block (10) abuts against the top of the punch needle body (7) and the hole protection cushion block (9). During installation, the punch needle body (7) is inserted into the through groove (15) from top to bottom, and finally the limit block (17) is placed in the limit groove (16), further improving 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 internal plum blossom bolts, characterized in that: It includes a fixed die (1) and a punching die (2). A positioning hole (3) is opened at the top of the fixed die (1). A punching cavity (4) is opened at the bottom of the punching die (2). A groove (5) penetrating through its top is opened on the punching die (2). The groove (5) communicates with the punching cavity (4). A punch needle sleeve (6) is inserted and slidably connected in the punching cavity (4). The punch needle sleeve (6) is provided with a punch needle groove penetrating through both ends along its length direction. A punch needle body (7) is inserted and slidably connected in the punch needle groove. A first bushing (8) is arranged at the bottom of the groove (5). A positioning component for positioning the punch needle sleeve (6) and the punch needle body (7) is also arranged in the groove (5). An adjusting component for adjusting the height position of the first bushing (8) is further arranged on the punching die (2). The adjusting component includes an adjusting sleeve (20) sleeved on the outer side wall of the punching die (2). A second internal thread (21) is arranged on the circumferential side wall of the adjusting sleeve (20). A second external thread (22) matching the second internal thread (21) is arranged on the outer surface of the punching die (2). A plurality of adjusting grooves (23) are opened on the outer surface of the punching die (2) along the circumferential direction. An adjusting block (24) is slidably connected in the adjusting groove (23). Symmetrical first inclined surfaces (25) are arranged at both ends thereof. A second inclined surface (26) is arranged on the bottom of the inner wall of the adjusting sleeve (20) along its circumferential direction. The second inclined surface (26) abuts against the first inclined surface (25) at one end of the adjusting block (24) extending out of the outer side of the punching die (2). A third inclined surface (27) is arranged on the bottom of the outer wall of the first bushing (8) along its circumferential direction. The third inclined surface (27) abuts against the first inclined surface (25) at the other end of the adjusting block (24). The positioning component includes a hole protection cushion block (9) slidably connected in the groove (5). Its bottom abuts against the first bushing (8). The hole protection cushion block (9) is provided with a through groove (15) for the punch needle body (7) to pass through. A three-needle cushion block (10) is arranged above the hole protection cushion block (9) in the groove (5). The bottom of the three-needle cushion block (10) abuts against the hole protection cushion block (9). A second bushing (11) is further arranged above the three-needle cushion block (10) in the groove (5). The positioning component further includes a positioning part for positioning the second bushing (11). A limiting groove (16) is opened at the top of the hole protection cushion block (9) located in the through groove (15). The diameter of the limiting groove (16) is larger than that of the through groove (15). A limiting block (17) inserted into the limiting groove (16) is arranged at the top end of the punch needle body (7). The bottom of the three-needle cushion block (10) abuts against the top of the punch needle body (7) and the hole protection cushion block (9).

2. The stamping die for an internal plum blossom bolt according to claim 1, characterized in that: The positioning part is specifically a positioning sleeve (12) arranged in the groove (5). A first external thread (13) is arranged on the outer surface of the positioning sleeve (12). A first internal thread (14) matching the first external thread (13) is arranged on the inner side wall of the groove (5). The bottom of the positioning sleeve (12) abuts against the top of the second bushing (11).

3. A stamping die for an internal plum blossom bolt according to claim 2, characterized in that: The hole protection spacer block (9) and the three - needle spacer block (10) are provided with three - needle grooves penetrating their upper and lower surfaces. A three - needle body (18) is inserted and slidably connected in the three - needle grooves. The bottom end of the three - needle body (18) is fixedly connected to the punch sleeve (6). A die punch spacer block (19) is slidably connected in the second bushing (11) and the positioning sleeve (12). The bottom of the die punch spacer block (19) is fixedly connected to the three - needle body (18). It further includes a driving member for pushing the die punch spacer block (19).

4. A stamping die for an internal plum blossom bolt according to claim 3, characterized in that: A connecting ring (28) is arranged along the circumferential side at the top of the outer side wall of the positioning sleeve (12).

5. A stamping die for an internal plum blossom bolt according to claim 4, characterized in that: The outer side wall of the adjusting sleeve (20) is provided with anti - slip stripes.

6. A processing method for an internal plum blossom bolt of the stamping die according to any one of claims 1-5, characterized in that, It includes the following steps: S1. According to the model of the processed product, select the corresponding processing raw material and process it through a cold - heading machine to obtain a bolt semi - finished product, forming a nut and a screw part. S2. According to the model of the processed product, adjust the height position of the first bushing through the adjusting component, and position and fix the die punch through the positioning component. S3. Insert the bottom end of the bolt semi - finished product in step S1 into the positioning hole of the fixed die, and drive the die punch to move towards the fixed die through the driving device to stamp and form the top of the bolt semi - finished product. S4. The driving device drives the die punch away from the fixed die. At the same time, the driving member pushes the die punch spacer block, driving the three - needle body and the punch sleeve to move downward relative to the die punch, so that the stamped bolt is separated from the die punch. S5. Take out and unload the stamped bolt from the fixed die.

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