High-efficiency bolt plum blossom groove cold heading device

Abstract

The high-efficiency bolt plum blossom groove cold heading device comprises a cold heading die holder and a cold heading stamping mechanism, the cold heading die holder comprises a base and a row of cold heading cylinders installed on the base, flange plate seats are arranged at the bottoms of the cold heading cylinders and fixed to the base through screws, vertical containing cavities are formed in the cold heading cylinders, and the flange plate seats are arranged in the containing cavities. A placing groove for placing the head of the bolt is formed in the top of the placing cavity; a limiting block and a buffer spring are arranged in the placing cavity; the cold heading stamping mechanism comprises a connecting plate and a row of stamping columns located at the bottom of the connecting plate, the stamping columns correspond to the cold heading cylinders one to one, the top of the connecting plate is provided with a connecting end connected with an external driving mechanism, and detachable stamping heads are installed at the bottom ends of the stamping columns. According to the device, the cold heading cylinder and the stamping head can be conveniently detached and replaced, and the overall efficiency is high; the cold heading die holder and the cold heading stamping mechanism of the same batch can be used for simultaneously processing bolts and plum blossom grooves of different models; and stable work after convenient disassembly and replacement can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of bolt processing, and in particular relates to a high-efficiency bolt hexagram slot cold heading device. Background Art

[0002] Cold heading belongs to the category of metal pressure processing and is one of the non-cutting metal pressure processing processes. In production, external force is applied to the metal at room temperature to form the metal in a predetermined mold. The processing of the hexagram slot of the bolt is mainly done through cold heading technology. The hexagram slot is in the shape of a flower. The external force is transmitted through the hexagram slot, which can more effectively transmit the tightening torque.

[0003] Bolt hexalobular slot cold heading equipment generally processes the hexalobular slot by placing the bolt on a stamping die seat and then punching the bolt head with a cold heading punch. However, the cold heading punch and stamping die seat of the cold heading equipment can generally only process one type of bolt, while there are many types of bolts with different sizes and different requirements for hexalobular slot processing. Since it is inconvenient to replace the cold heading punch and stamping die seat, the overall efficiency is low when processing multiple types or performing hexalobular slot processing with different requirements. Utility Model Content

[0004] The utility model provides a high-efficiency bolt hexalobular slot cold heading device, the cold heading cylinder and the punching head of the device can be conveniently disassembled and replaced, and the overall efficiency is high; the cold heading die base and the cold heading punching mechanism of the same batch can simultaneously process bolts and hexalobular slots of different models; stable operation can be achieved after convenient disassembly and replacement, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-efficiency bolt hexagonal slot cold heading device, including a cold heading die base and a cold heading punching mechanism, the cold heading die base includes a base and a row of cold heading cylinders mounted thereon, the bottom of the cold heading cylinder is provided with a flange seat and is fixed to the base by screws, a vertical placement cavity is provided in the cold heading cylinder, a placement groove for placing the bolt head is provided at the top of the placement cavity, and a limit block and a buffer spring are installed in the placement cavity; the cold heading punching mechanism includes a connecting plate and a row of punching columns located at the bottom thereof, the punching columns correspond to the cold heading cylinder one by one, the top of the connecting plate is provided with a connecting end connected to an external driving mechanism, and the bottom end of the punching column is provided with a detachable punching head.

[0006] Preferably, an upper positioning hole is provided at the center of the flange seat, a lower positioning hole is provided on the base and is located below and corresponding to the upper positioning hole, and a positioning rod is provided on the bottom surface of the limit block and is inserted into the upper positioning hole and the lower positioning hole.

[0007] Preferably, a spring groove with a diameter larger than that of the upper positioning hole is provided at the center of the top surface of the flange seat, the bottom end of the buffer spring is located in the spring groove, and the buffer spring is sleeved outside the positioning rod.

[0008] Preferably, a connecting part is provided on the top of the punching head, and the connecting part is a polygonal column. An inner positioning groove is provided on one side of the connecting part, and an extrusion spring and a positioning block are installed in the inner positioning groove. The punching column is provided with a groove for clamping the connecting part therein, and an outer positioning groove corresponding to the inner positioning groove is also provided in the groove. The positioning block is partially clamped in the outer positioning groove, and the punching column is provided with a straight hole passing through the outer positioning groove.

[0009] Preferably, the punching heads are provided in different models, and the connecting parts are of the same model and size.

[0010] Preferably, the base is provided with a flange groove that cooperates with the flange seat.

[0011] Preferably, the cold heading cylinders are provided with different models, and the flange seats are of the same model and size.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. Both the cold heading cylinder and the punching head can be easily disassembled and replaced, with high overall efficiency.

[0014] 2. The cold heading die base and cold heading punching mechanism of the same batch can process different types of bolts and hexalobular sockets at the same time.

[0015] 3. It can realize stable operation after convenient disassembly and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0017] Figure 2 This is a schematic cross-sectional structure diagram of the cold heading cylinder, the limit block, and the buffer spring of the utility model;

[0018] Figure 3 This is a schematic cross-sectional structure diagram of the cold heading cylinder of the utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the punching column and the punching head connection of the utility model;

[0020] Figure 5 It is a schematic diagram of the top view of the punching head, connecting part and positioning block of the utility model.

[0021] In the figure: 1. cold heading die seat; 2. cold heading punching mechanism; 3. base; 4. cold heading cylinder; 5. flange seat; 6. placement cavity; 7. placement slot; 8. limit block; 9. buffer spring; 10. connecting plate; 11. punching column; 12. punching head; 13. upper positioning hole; 14. lower positioning hole; 15. positioning rod; 16. spring slot; 17. connecting part; 18. inner positioning slot; 19. extrusion spring; 20. positioning block; 21. outer positioning slot; 22. straight hole. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-5 The utility model provides a high-efficiency bolt hexagram slot cold heading device, including a cold heading die base 1 and a cold heading punching mechanism 2, the cold heading die base 1 includes a base 3 and a row of cold heading cylinders 4 mounted thereon, the bottom of the cold heading cylinder 4 is provided with a flange seat 5, and is fixed to the base 3 by screws, a vertical placement cavity 6 is provided in the cold heading cylinder 4, a placement groove 7 for placing the bolt head is provided at the top of the placement cavity 6, and a limiting block 8 and a buffer spring 9 are installed in the placement cavity 6; the cold heading punching mechanism 2 includes a connecting plate 10 and a row of punching columns 11 located at the bottom thereof, the punching columns 11 correspond to the cold heading cylinder 4 one by one, the top of the connecting plate 10 is provided with a connecting end connected to an external driving mechanism, and the bottom end of the punching column 11 is provided with a detachable punching head 12; during cold heading processing, the bolt can be placed in the placement cavity 6, and its head will be placed in the placement groove 7, and the bolt head will be placed in the placement groove 7. The bottom end of the bolt will abut against the limit block 8, and the limit block 8 will be lifted to a certain height under the action of the buffer spring 9, and will drop a certain distance after the bolt is placed, but the limit block 8 still cannot contact the flange seat 5. The connecting plate 10 is driven down by controlling the external driving mechanism, and the stamping column 11 and the stamping head 12 are driven down simultaneously. When the bolt head is squeezed, it will be buffered by the buffer spring 9. When the limit block 8 drops and abuts against the flange seat 5, it reaches the set position, and then the stamping head 12 will squeeze the bolt head in the placement groove 7 to form a plum blossom groove. When the stamping head 12 needs to be replaced, different types of stamping heads 12 can be easily replaced, and stable work after locking can be achieved. At the same time, the cold heading cylinder 4 corresponding to the stamping head 12 needs to be replaced accordingly. It only needs to unscrew the screws and replace it. Since the sizes of the flange seats 5 are the same, they can be directly replaced, and stable work can be achieved after convenient disassembly and replacement, and the overall efficiency is high.

[0024] Specifically, an upper positioning hole 13 is provided at the center of the flange seat 5, a lower positioning hole 14 is provided on the base 3 and is located below the upper positioning hole 13 and corresponds to the upper positioning hole 13, and a positioning rod 15 is provided on the bottom surface of the limit block 8 and is inserted into the upper positioning hole 13 and the lower positioning hole 14; in this embodiment, the positioning rod 15 can further position the base 3 and the flange seat 5 to achieve stable operation after convenient disassembly and replacement.

[0025] Specifically, a spring groove 16 with a diameter larger than the upper positioning hole 13 is provided at the center of the top surface of the flange seat 5, the bottom end of the buffer spring 9 is located in the spring groove 16, and the buffer spring 9 is sleeved outside the positioning rod 15; in this embodiment, after the limit block 8 descends and rests on the flange seat 5, the buffer spring 9 can be completely hidden in the spring groove 16 and will not interfere with the limit block 8.

[0026] Specifically, a connecting portion 17 is provided on the top of the punching head 12, and the connecting portion 17 is a polygonal column. An inner positioning groove 18 is provided on one side of the connecting portion 17, and an extrusion spring 19 and a positioning block 20 are installed in the inner positioning groove 18. The punching column 11 is provided with a groove for clamping the connecting portion 17 therein, and an outer positioning groove 21 corresponding to the inner positioning groove 18 is also provided in the groove, and the positioning block 20 is partially clamped in the outer positioning groove 21, and the punching column 11 is provided with a straight hole 22 passing through the outer positioning groove 21; in this embodiment, when the punching head 12 needs to be replaced, the positioning block 20 only needs to be pushed back into the inner positioning groove 18 through the straight hole 22 to realize the disassembly of the punching head 12, and then when installing, the positioning block 20 is first squeezed into the inner positioning groove 18, and after the connecting portion 17 is inserted into place, the positioning block 20 will be partially squeezed into the outer positioning groove 21 under the action of the extrusion spring 19 to achieve locking, which is very stable during stamping.

[0027] Specifically, the punching heads 12 are provided with different models, and the models and sizes of the connecting parts 17 are the same; in the present embodiment, the punching heads 12 of different models can be quickly adapted and installed at the bottom end of the punching column 11 through the same connecting part 17, and different hexagram slots can be processed simultaneously through different punching heads 12 through one device.

[0028] Specifically, the base 3 is provided with a flange groove matched with the flange seat 5; in the present embodiment, since the flange seat 5 is positioned in the groove, it is beneficial for the cold heading cylinder 4 to work stably after being conveniently disassembled and replaced.

[0029] Specifically, the cold heading cylinder 4 is provided with different models, and the model and size of the flange seat 5 are all the same; in this embodiment, the cold heading cylinders 4 of different models can be quickly adapted and installed on the base 3 through the same flange seat 5, and different models of bolts can be processed simultaneously through different cold heading cylinders 4 through one device.

[0030] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0031] Working principle: During cold heading processing, the bolt can be placed in the placement cavity 6, and its head will be placed in the placement groove 7. The bottom end of the bolt will rest on the limit block 8. The limit block 8 will be lifted to a certain height under the action of the buffer spring 9. After the bolt is placed, it will drop a certain distance, but the limit block 8 still cannot contact the flange seat 5. The connecting plate 10 is driven down by controlling the external driving mechanism, and the stamping column 11 and the stamping head 12 are driven down simultaneously. When the bolt head is squeezed, it will be buffered by the buffer spring 9. When the limit block 8 drops and rests on the flange seat 5, it reaches the set position. The buffer spring 9 is hidden in the spring groove 16, and then the stamping head 12 will squeeze the bolt head in the placement groove 7 to form a plum blossom groove. When the stamping head 12 needs to be replaced, just push the positioning block 20 back to the inner positioning groove 1 through the straight hole 22 8 can realize the disassembly of the punch head 12, and then when installing, first squeeze the positioning block 20 into the inner positioning groove 18, and after the connecting part 17 is inserted into place, the positioning block 20 will be partially squeezed into the outer positioning groove 21 under the action of the squeezing spring 19 to achieve locking, which is very stable during stamping. At the same time, the cold heading tube 4 corresponding to the punch head 12 needs to be replaced accordingly, and it can be replaced by unscrewing the screws. Since the sizes of the flange seats 5 are all the same, they can be replaced directly, and since the flange seats 5 are limited in the groove, the positioning rods 15 also further position the base 3 and the flange seat 5, which can realize stable operation after convenient disassembly and replacement. At the same time, the cold heading die seat 1 and the cold heading stamping mechanism 2 of the same batch can also process different types of bolts and plum blossom grooves at the same time, which is convenient to replace the cold heading tube 4 and the punch head 12, and the overall efficiency is high.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency bolt hexalobular socket cold heading device, comprising a cold heading die base (1) and a cold heading punching mechanism (2), characterized in that: The cold heading die base (1) comprises a base (3) and a row of cold heading cylinders (4) mounted thereon, the bottom of the cold heading cylinder (4) is provided with a flange seat (5) and is fixed to the base (3) by screws, a vertical placement cavity (6) is provided in the cold heading cylinder (4), the top of the placement cavity (6) is provided with a placement groove (7) for placing the bolt head, and a limit block (8) and a buffer spring (9) are installed in the placement cavity (6); the cold heading punching mechanism (2) comprises a connecting plate (10) and a row of punching columns (11) located at the bottom thereof, the punching columns (11) correspond one to one with the cold heading cylinder (4), the top of the connecting plate (10) is provided with a connection end for connecting to an external driving mechanism, and the bottom of the punching column (11) is provided with a detachable punching head (12).

2. A high-efficiency bolt hexalobular socket cold heading device according to claim 1, characterized in that: An upper positioning hole (13) is provided at the center of the flange seat (5), a lower positioning hole (14) is provided on the base (3) and is located below the upper positioning hole (13) and corresponds to the upper positioning hole (13), and a positioning rod (15) is provided on the bottom surface of the limit block (8) and is inserted into the upper positioning hole (13) and the lower positioning hole (14).

3. A high-efficiency bolt hexalobular socket cold heading device according to claim 2, characterized in that: A spring groove (16) having a diameter greater than that of the upper positioning hole (13) is provided at the center of the top surface of the flange seat (5); the bottom end of the buffer spring (9) is located in the spring groove (16); and the buffer spring (9) is sleeved outside the positioning rod (15).

4. A high-efficiency bolt hexalobular socket cold heading device according to claim 1, characterized in that: The top of the punch head (12) is provided with a connecting portion (17), the connecting portion (17) is a polygonal column, one side of the connecting portion (17) is provided with an inner positioning groove (18), and the inner positioning groove (18) is provided with a compression spring (19) and a positioning block (20), the punch column (11) is provided with a groove for clamping the connecting portion (17), the groove is also provided with an outer positioning groove (21) corresponding to the inner positioning groove (18), the positioning block (20) is partially clamped in the outer positioning groove (21), and the punch column (11) is provided with a straight hole (22) passing through the outer positioning groove (21).

5. A high-efficiency bolt hexalobular socket cold heading device according to claim 4, characterized in that: The punching heads (12) are provided in different models, and the connecting parts (17) are all of the same model and size.

6. A high-efficiency bolt hexalobular socket cold heading device according to claim 1, characterized in that: The base (3) is provided with a flange groove that matches the flange seat (5).

7. A high-efficiency bolt hexalobular socket cold heading device according to claim 6, characterized in that: The cold heading cylinders (4) are provided in different models, and the flange seats (5) are provided in the same model and size.

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