Screw cold heading forming device

Abstract

The utility model relates to the field of cold heading technology, and discloses a screw cold heading forming device which comprises a fixing support, a stamping assembly is fixedly connected in the fixing support and used for providing cold heading power, a die is fixedly connected in the fixing support, a die groove is formed in the die, and the stamping assembly is used for providing cold heading power. A piston cylinder is fixedly connected to the right side of the mold, side cylinders are fixedly connected to the front side and the rear side of the piston cylinder, communicating grooves are formed in the side cylinders, a piston ring is elastically connected to the inner wall of the right side of the piston cylinder through limiting springs, and a sliding sleeve is fixedly connected to the left side of the piston ring. According to the utility model, the piston cylinder, the piston ring, the reset rod and other structures are arranged, so that the bar is buffered after being pushed into the die, and meanwhile, the bar is pushed out after cold heading of the bar is completed, so that the impact force on the die can be reduced, the service life of the die is effectively prolonged, and the economic benefit is better.

Description

Technical Field

[0001] This utility model relates to the field of cold heading process, and in particular to a screw cold heading forming device. Background Technology

[0002] Cold heading is a new metal pressure processing technology that utilizes the plastic deformation characteristics of metal materials under ambient temperature conditions. Pressure is applied to a metal blank using a die, causing a redistribution and transfer of its volume, thereby obtaining a part or blank of the desired shape and size. This process eliminates the need for heat treatment of the metal and offers advantages such as high material utilization, high production efficiency, high product precision, and a high degree of automation.

[0003] In order to facilitate the forging of bars or wires into screws and reduce the consumption of raw materials, a screw cold forging device is needed.

[0004] Current cold heading forming devices for screws generate enormous punching force from the punch head during operation, instantly forcing the bar stock into the mold. The inner mold cavity shapes the bar stock. In actual use, the instantaneous punching force from the punch head impacts the mold through the bar stock, resulting in a short mold lifespan after continuous impacts. Simultaneously, the bar stock generates high temperatures during cold heading, causing the screw to have low hardness upon falling and making it prone to deformation. Therefore, a new cold heading forming device for screws is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a screw cold heading forming device, which aims to improve the problem of short service life of molds after continuous impact in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a screw cold heading forming device, comprising a fixed bracket, a stamping assembly fixedly connected inside the fixed bracket, the stamping assembly being used to provide cold heading power, a mold fixedly connected inside the fixed bracket, a mold groove being opened inside the mold, a piston cylinder fixedly connected to the right side of the mold, side cylinders fixedly connected to the front and rear sides of the piston cylinder, a communicating groove being opened inside the side cylinder, a piston ring elastically connected to the inner wall of the right side of the piston cylinder through a limiting spring, a sliding sleeve fixedly connected to the left side of the piston ring, and a reset rod elastically connected to the inner wall of the right side of the sliding sleeve through a reset spring.

[0007] As a further description of the above technical solution:

[0008] A ramp block is fixedly connected to the inner wall of the bottom end of the fixed bracket. An air inlet slot is opened on the back of the ramp block. A fan is installed inside the ramp block. A buffer sleeve is fixedly connected to the top of the ramp block. A sliding column is elastically connected to the inner wall of the bottom end of the buffer sleeve through a buffer spring. A receiving plate is fixedly connected to the top of the sliding column.

[0009] As a further description of the above technical solution:

[0010] The stamping assembly includes a stamping cylinder, the outer periphery of which is fixedly connected to the inside of a fixed bracket, and a stamping head is fixedly connected to the right telescopic end of the stamping cylinder.

[0011] As a further description of the above technical solution:

[0012] One end of the limiting spring is fixedly connected to the inner wall of the right side of the piston cylinder, and the other end of the limiting spring is fixedly connected to the right side of the piston ring. The outer circumference of the piston ring is slidably connected to the piston cylinder.

[0013] As a further description of the above technical solution:

[0014] The outer periphery of the sliding sleeve extends through and is slidably connected to the left side of the piston cylinder, and the outer periphery of the sliding sleeve is slidably connected to the inside of the mold groove.

[0015] As a further description of the above technical solution:

[0016] One end of the reset spring is fixedly connected to the inner wall of the right side of the sliding sleeve, and the other end of the reset spring is fixedly connected to the right side of the reset rod. The outer periphery of the reset rod is slidably connected to the inside of the sliding sleeve.

[0017] As a further description of the above technical solution:

[0018] One end of the buffer spring is fixedly connected to the inner wall of the bottom end of the buffer sleeve, and the other end of the buffer spring is fixedly connected to the bottom end of the sliding column. The outer periphery of the sliding column is slidably connected to the inside of the buffer sleeve.

[0019] As a further description of the above technical solution:

[0020] The receiving plate has a through ventilation slot inside.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, by setting up structures such as piston cylinder, piston ring, and reset rod, the rod is buffered after being pushed into the mold, and then pushed out after the rod is cold-forged. This reduces the impact force on the mold, effectively increases the mold life, and has good economic benefits.

[0023] 2. In this utility model, by setting up structures such as buffer sleeve, receiving plate, and fan, the bar is cooled by the fan and buffered by the elastic force of the buffer spring after the cold heading is completed and pushed out, thereby increasing the hardness of the bar and reducing the damage to the bar, and increasing the yield. Attached Figure Description

[0024] Figure 1 This is a front view of the screw cold heading forming device proposed in this utility model;

[0025] Figure 2 This is a schematic cross-sectional view of the top of the mold of a screw cold heading forming device proposed in this utility model;

[0026] Figure 3 This is a schematic cross-sectional view of the left side of the ramp block of a screw cold heading forming device proposed in this utility model;

[0027] Figure 4 This is a schematic cross-sectional view of the left side of the buffer sleeve of a screw cold heading forming device proposed in this utility model.

[0028] Legend:

[0029] 1. Fixed bracket; 2. Stamping cylinder; 3. Stamping head; 4. Die; 5. Die groove; 6. Piston cylinder; 7. Side cylinder; 8. Connecting groove; 9. Limiting spring; 10. Piston ring; 11. Sliding sleeve; 12. Return spring; 13. Return rod; 14. Inclined block; 15. Air inlet slot; 16. Fan; 17. Buffer sleeve; 18. Buffer spring; 19. Sliding column; 20. Receiving plate. Detailed Implementation

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Reference Figures 1-2This utility model provides an embodiment of a screw cold heading forming device, including a fixed support 1 for fixed support, a stamping assembly fixedly connected inside the fixed support 1, the stamping assembly for providing cold heading power, the stamping assembly including a stamping cylinder 2, the stamping cylinder 2 being fixedly connected to the outside of the fixed support 1, a stamping head 3 being fixedly connected to the right telescopic end of the stamping cylinder 2, when the stamping cylinder 2 is opened, the stamping cylinder 2 can drive the stamping head 3 to move to the right to stamp the bar, a mold 4 being fixedly connected inside the fixed support 1, the mold 4 having a mold groove 5 inside, after the bar enters the mold groove 5, it will be squeezed into the shape of the mold groove 5, a piston cylinder 6 being fixedly connected to the right side of the mold 4, the piston... The cylinder 6 stores hydraulic oil. Side cylinders 7 are fixedly connected to both the front and rear sides of the piston cylinder 6. A connecting groove 8 is opened inside the side cylinder 7, which is connected to the inside of the piston cylinder 6. A piston ring 10 is elastically connected to the inner wall of the right side of the piston cylinder 6 through a limiting spring 9. When the piston ring 10 is not under force, the limiting spring 9 will push the piston ring 10 to the left. One end of the limiting spring 9 is fixedly connected to the inner wall of the right side of the piston cylinder 6, and the other end of the limiting spring 9 is fixedly connected to the right side of the piston ring 10. The outer circumference of the piston ring 10 is slidably connected to the inside of the piston cylinder 6. The piston ring 10 and the piston cylinder 6 have good sealing performance. The piston cylinder 6 restricts the piston ring 10 to slide only along the inner wall of the piston cylinder 6.

[0032] Reference Figure 2 A sliding sleeve 11 is fixedly connected to the left side of the piston ring 10. The outer circumference of the sliding sleeve 11 is slidably connected to the left side of the piston cylinder 6. The sliding sleeve 11 will slide left and right with the piston ring 10. The outer circumference of the sliding sleeve 11 is slidably connected to the inside of the mold groove 5. The mold groove 5 restricts the sliding sleeve 11 to slide left and right only along the inner wall of the mold groove 5. The inner wall of the right side of the sliding sleeve 11 is elastically connected to a reset rod 13 through a reset spring 12. When the reset rod 13 is not under force, the reset spring 12 will push the reset rod 13 to the left. One end of the reset spring 12 is fixedly connected to the inner wall of the right side of the sliding sleeve 11, and the other end of the reset spring 12 is fixedly connected to the right side of the reset rod 13. The reset rod 13 is used to push the extruded rod out of the mold 4. The outer circumference of the reset rod 13 is slidably connected to the inside of the sliding sleeve 11. The sliding sleeve 11 restricts the reset rod 13 to slide left and right only along the inner wall of the sliding sleeve 11.

[0033] Reference Figure 1 , Figure 3 and Figure 4A ramp block 14 is fixedly connected to the inner wall of the bottom end of the fixed bracket 1. An air inlet slot 15 is provided on the back of the ramp block 14 to facilitate air entry. A fan 16 is installed inside the ramp block 14. Three sets of fans 16 are evenly distributed inside the ramp block 14. A buffer sleeve 17 is fixedly connected to the top of the ramp block 14. Several sets of buffer sleeves 17 are evenly distributed on the top of the ramp block 14. A sliding column 19 is elastically connected to the inner wall of the bottom end of the buffer sleeve 17 through a buffer spring 18. When the sliding column 19 is not under force, the buffer spring 18 will move upward. Pushing the sliding column 19, one end of the buffer spring 18 is fixedly connected to the inner wall of the bottom end of the buffer sleeve 17, and the other end of the buffer spring 18 is fixedly connected to the bottom end of the sliding column 19. The outer periphery of the sliding column 19 is slidably connected to the inside of the buffer sleeve 17. The buffer sleeve 17 restricts the sliding column 19 to slide up and down only along the inner wall of the buffer sleeve 17. The top end of the sliding column 19 is fixedly connected to the receiving plate 20. The receiving plate 20 has a through ventilation slot. Several sets of ventilation slots are evenly distributed inside the receiving plate 20 to facilitate the passage of cold air from the fan 16.

[0034] Working principle: When it is desired to reduce the impact force of the stamping head 3 on the mold 4, the stamping head 3 pushes the bar into the interior of the mold groove 5. The bar pushes the reset rod 13 to move to the right. When the reset rod 13 moves to the right, the bar will drive the sliding sleeve 11 to move to the right through the reset rod 13. The sliding sleeve 11 moves to the right and pushes the piston ring 10 to move to the right. The piston ring 10 squeezes the hydraulic oil, so that the hydraulic oil enters the left side of the piston ring 10 from the right side through the connecting groove 8, thereby generating resistance and buffering the impact force of the stamping head 3, thereby reducing the impact force of the mold 4. After the stamping is completed, the limit spring 9 and the reset spring 12 reset, push the reset rod 13 to the left, and push the bar out of the interior of the mold groove 5 to complete the cold heading. However, if you want to lower the temperature of the bar stock after cold heading, turn on the fan 16. The fan 16 blows cold air upwards and through the receiving plate 20, the bar stock falls onto the receiving plate 20 after cold heading. The cold air cools the bar stock, increasing its hardness. At the same time, the receiving plate 20 is compressed and moves downwards, compressing the buffer spring 18 to create a buffer, thereby reducing damage to the bar stock.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A screw cold heading forming device, comprising a fixed bracket (1), characterized in that: The fixed bracket (1) is fixedly connected to a stamping assembly, which is used to provide cold heading power. The fixed bracket (1) is fixedly connected to a mold (4), which has a mold groove (5) inside. The right side of the mold (4) is fixedly connected to a piston cylinder (6). The piston cylinder (6) is fixedly connected to the front and rear sides of the piston cylinder (6). The side cylinder (7) has a connecting groove (8) inside. The right inner wall of the piston cylinder (6) is elastically connected to a piston ring (10) through a limiting spring (9). The left side of the piston ring (10) is fixedly connected to a sliding sleeve (11). The right inner wall of the sliding sleeve (11) is elastically connected to a reset rod (13) through a reset spring (12).

2. The screw cold heading forming device according to claim 1, characterized in that: The bottom inner wall of the fixed bracket (1) is fixedly connected to a ramp block (14), the back of the ramp block (14) is provided with an air inlet slot (15), a fan (16) is provided inside the ramp block (14), a buffer sleeve (17) is fixedly connected to the top of the ramp block (14), a sliding column (19) is elastically connected to the bottom inner wall of the buffer sleeve (17) through a buffer spring (18), and a receiving plate (20) is fixedly connected to the top of the sliding column (19).

3. The screw cold heading forming device according to claim 1, characterized in that: The stamping assembly includes a stamping cylinder (2), the outer periphery of which is fixedly connected to the inside of the fixed bracket (1), and a stamping head (3) is fixedly connected to the right telescopic end of the stamping cylinder (2).

4. The screw cold heading forming device according to claim 1, characterized in that: One end of the limiting spring (9) is fixedly connected to the inner wall of the right side of the piston cylinder (6), and the other end of the limiting spring (9) is fixedly connected to the right side of the piston ring (10). The outer circumference of the piston ring (10) is slidably connected to the piston cylinder (6).

5. The screw cold heading forming device according to claim 1, characterized in that: The outer periphery of the sliding sleeve (11) extends through and is slidably connected to the left side of the piston cylinder (6), and the outer periphery of the sliding sleeve (11) is slidably connected to the inside of the mold groove (5).

6. The screw cold heading forming device according to claim 1, characterized in that: One end of the reset spring (12) is fixedly connected to the inner wall of the right side of the sliding sleeve (11), and the other end of the reset spring (12) is fixedly connected to the right side of the reset rod (13). The outer periphery of the reset rod (13) is slidably connected to the inside of the sliding sleeve (11).

7. The screw cold heading forming device according to claim 2, characterized in that: One end of the buffer spring (18) is fixedly connected to the inner wall of the bottom end of the buffer sleeve (17), and the other end of the buffer spring (18) is fixedly connected to the bottom end of the sliding column (19). The outer periphery of the sliding column (19) is slidably connected to the inside of the buffer sleeve (17).

8. The screw cold heading forming device according to claim 2, characterized in that: The receiving plate (20) has a through ventilation slot inside.

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