Automatic feeding device suitable for cold header

Abstract

The invention relates to the technical field of cold heading machining, and discloses an automatic feeding device suitable for a cold header, which comprises a fixed base table, a rotating column fixedly connected to the fixed base table, a central winding column fixedly connected to the middle of the top end of a supporting table, a wire coil wound on the side surface of the central winding column, and a copper wire fixedly connected to the side surface of the wire coil. The two sides of the copper wire are movably connected with feeding mechanisms, the interiors of the feeding mechanisms are movably connected with adjusting mechanisms, and the interior of the workbench is movably connected with a power mechanism. When the two feeding blocks make contact with the copper wire, the feeding blocks can move away from the copper wire, and when the feeding blocks are away from the copper wire, a moving rod and a cross plate are driven to move and compress a second pre-pressing spring, so that the feeding blocks make contact with the copper wire after being buffered, and damage caused by direct rigid contact with the copper wire is avoided; the two feeding blocks clamp the copper wire and drive the copper wire to move in a flexible contact mode, enough pressure is provided, and meanwhile the copper wire is prevented from being damaged.

Description

Technical Field

[0001] This invention relates to the field of cold heading technology, and more specifically to an automatic feeding device suitable for cold heading machines. Background Technology

[0002] Cold heading machines are highly efficient automated equipment for producing standard parts, screws, rivets, and other metal parts. In the processing of copper screws, coils of copper wire need to be continuously, stably, and precisely fed into the cold heading machine for shearing, upsetting, and forming. Cold heading is a plastic forming process that produces almost no waste, making it a commonly used processing technique. Copper has good plasticity and ductility, making it very suitable for cold heading deformation processing. Standard copper screws and copper bolts are basically manufactured by cold heading and thread rolling processes. During processing, the wire is fed into the cold heading machine, first cut to the predetermined length, and then punched multiple times in the cold heading die to form the head and shank of the screw. After the threads are processed in the thread rolling machine, the properties are adjusted through heat treatment and surface treatment to complete the production. When feeding copper wire, automatic feeding is performed by feeding rollers. However, copper is relatively soft and its surface is easily scratched. If the pressure of the feeding rollers is too high, it will damage the copper wire. If the pressure is too low, the feeding will slip and fail to feed normally. When feeding, current feeding mechanisms cannot automatically adjust according to different wire diameters. Therefore, when changing cold heading wire, the feeding mechanism needs to be changed simultaneously, which wastes costs. When feeding, current feeding devices require a complex structure to feed through multiple sets of feeding rollers, and the problem of multiple sets of feeding rollers being out of sync is prone to occur. Summary of the Invention

[0003] In order to overcome the above-mentioned defects of the prior art, embodiments of the present invention provide an automatic feeding device suitable for cold heading machines to solve the technical problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an automatic feeding device suitable for a cold heading machine, comprising a fixed base, a rotating column fixedly connected to the fixed base, a support platform movably connected to the top of the rotating column, a central winding column fixedly connected to the middle of the top of the support platform, a wire loop wound around the side of the central winding column, copper wire fixedly connected to the side of the wire loop, feeding mechanisms movably connected to both sides of the copper wire, an adjusting mechanism movably connected inside the feeding mechanism, a worktable movably connected to the bottom of the adjusting mechanism, a power mechanism movably connected inside the worktable, the power mechanism controlling the rotation of the adjusting mechanism and the feeding mechanism, the adjusting mechanism adjusting the distance between the feeding mechanisms, and the feeding mechanism clamping the copper wire and driving the copper wire to move for feeding.

[0005] Furthermore, two adjustment mechanisms and a feeding mechanism are provided on both sides of the top of the workbench. The two feeding mechanisms on each side are used for feeding. A rubber ring is provided on the side of the copper wire away from the wire coil. A straightening roller is fixedly connected inside the rubber ring. An output machine is movably connected to the side of the straightening roller. The straightening roller drives the rubber ring to rotate and straighten the copper wire.

[0006] Furthermore, the power mechanism includes a servo motor that provides power. An output shaft is fixedly connected to the top of the servo motor. An output gear is fixedly connected to the side of the output shaft. A transmission gear meshes with the side of the output gear. A rotating gear set meshes with the side of the transmission gear away from the output gear. The output shaft and the connecting disc drive the rotating disc inside the adjustment mechanism to rotate.

[0007] Furthermore, a synchronous pulley is fixedly connected to the bottom end of the side of the output shaft, and a synchronous belt is engaged on the side of the synchronous pulley. The two sides of the synchronous belt have the same structure, and the adjustment mechanisms on both sides of the top of the worktable rotate synchronously.

[0008] Furthermore, the adjustment mechanism includes a rotating disk that rotates with the power mechanism. A threaded rod is movably connected to the center of the top of the rotating disk. A conical block is threadedly connected to the side of the threaded rod. An adjustment wheel is fixedly connected to the top of the conical block, and a connecting disk is fixedly connected to the bottom of the conical block.

[0009] Furthermore, the connecting disc has a threaded groove inside that matches the threaded rod, and a limiting post is movably connected inside the connecting disc. The bottom end of the limiting post is fixedly connected to the top end of the rotating disc, and a support rod is fixedly connected to the top end of the rotating disc. The top end of the support rod is fixedly connected to the bottom end of the rotating ring inside the feeding mechanism.

[0010] Furthermore, the feeding mechanism includes a rotating ring fixedly connected to the adjusting mechanism. A connecting rod is movably connected inside the rotating ring. A limiting ball is fixedly connected inside the rotating ring to the connecting rod. The diameter of the limiting ball is larger than the diameter of the connecting rod. The number of connecting rods is twelve.

[0011] Furthermore, a pad is fixedly connected inside the rotating ring. The pad is located outside the connecting rod and is movably connected to the connecting rod. A first preload spring is movably connected to the side of the connecting rod. The first preload spring is located between the limiting ball and the pad. The side of the pad near the limiting ball is flat.

[0012] Furthermore, a limiting frame is fixedly connected to the side of the connecting rod located outside the rotating ring, a limiting rod is fixedly connected to the side of the limiting frame near the limiting ball, a cross plate is movably connected inside the limiting frame, and a moving rod is fixedly connected to the side of the cross plate away from the pad.

[0013] Furthermore, a feeding block is fixedly connected to the side of the moving rod away from the cross plate, and a second preload spring is movably connected to the side of the feeding block, the second preload spring being located between the limiting frame and the feeding block.

[0014] The technical effects and advantages of this invention are as follows: 1. When the two feeding blocks of the present invention come into contact with the copper wire, the feeding blocks will move away from the copper wire. When the feeding blocks move away, they will drive the moving rod and the cross plate to move and compress the second pre-compression spring, so that the feeding blocks are buffered before contacting the copper wire, avoiding direct hard contact with the copper wire and damage. The two feeding blocks clamp the copper wire and drive the copper wire to move in a flexible contact manner, providing sufficient pressure while avoiding damage to the copper wire. 2. When feeding copper wires of different sizes, the present invention rotates the adjusting wheel, which drives the threaded rod to rotate. When the threaded rod rotates, it drives the conical block to move up and down. When the conical block moves up and down, the limiting ball moves outward or inward, which in turn causes the feeding block to move inward or outward. By adjusting the distance between the two feeding blocks, copper wires of different sizes can be stably clamped and fed. 3. This invention features an output shaft, an output gear, a rotating gear set, and a synchronous belt. When the servo motor starts, it drives the output shaft to rotate. The output shaft rotates, which in turn drives the transmission gear to rotate, causing the rotating gear set to rotate. At this time, the two rotating disks on one side of the worktable rotate, and the rotation of the output shaft drives the rotating disk on the other side to rotate synchronously through the synchronous wheel and the synchronous belt. This allows the invention to feed materials synchronously, and the structure is simple. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 This is a schematic diagram of the overall structure of the workbench of the present invention.

[0017] Figure 3 This is a schematic diagram of the power mechanism structure of the present invention.

[0018] Figure 4 This is a schematic diagram of the overall structure of the adjustment mechanism of the present invention.

[0019] Figure 5 This is an exploded view of the adjustment mechanism of the present invention.

[0020] Figure 6 This is a schematic diagram of the overall structure of the feeding mechanism of the present invention.

[0021] Figure 7 This is an exploded structural diagram of the feeding mechanism of the present invention.

[0022] Figure 8 This is a schematic diagram of the inner limiting frame structure of the feeding mechanism of the present invention.

[0023] The attached diagram is labeled as follows: 1. Fixed base; 2. Rotating column; 3. Support platform; 4. Central winding column; 5. Wire coil; 6. Copper wire; 7. Worktable; 8. Power mechanism; 801. Servo motor; 802. Output shaft; 803. Output gear; 804. Transmission gear; 805. Rotating gear set; 806. Synchronous pulley; 807. Synchronous belt; 9. Adjustment mechanism; 901. Rotating disk; 902. Threaded rod; 903. Adjusting wheel; 904. Conical block; 9 05. Connecting plate; 906. Limiting post; 907. Support rod; 10. Feeding mechanism; 1001. Rotating ring; 1002. Connecting rod; 1003. Limiting ball; 1004. Pad; 1005. First preload spring; 1006. Limiting frame; 1007. Limiting rod; 1008. Cross plate; 1009. Moving rod; 1010. Feeding block; 1011. Second preload spring; 11. Output platform; 12. Straightening roller; 13. Rubber ring. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The automatic feeding device for cold heading machines involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Reference Figure 1 as well as Figure 2This invention provides an automatic feeding device suitable for a cold heading machine, comprising a fixed base 1, a rotating column 2 fixedly connected to the fixed base 1, a support platform 3 movably connected to the top of the rotating column 2, a central winding column 4 fixedly connected to the middle of the top of the support platform 3, a wire coil 5 wound around the side of the central winding column 4, copper wire 6 fixedly connected to the side of the wire coil 5, a feeding mechanism 10 movably connected to both sides of the copper wire 6, an adjusting mechanism 9 movably connected inside the feeding mechanism 10, a worktable 7 movably connected to the bottom of the adjusting mechanism 9, and a power mechanism 8 movably connected inside the worktable 7. Mechanism 8 controls the rotation of adjustment mechanism 9 and feeding mechanism 10. Adjustment mechanism 9 adjusts the distance between feeding mechanisms 10. Feeding mechanism 10 clamps copper wire 6 and drives copper wire 6 to move for feeding. Two adjustment mechanisms 9 and feeding mechanisms 10 are provided on both sides of the top of workbench 7. The two feeding mechanisms 10 on each side feed the copper wire. A rubber ring 13 is provided on the side of copper wire 6 away from wire coil 5. A straightening roller 12 is fixedly connected inside the rubber ring 13. An output machine 11 is movably connected to the side of the straightening roller 12. The straightening roller 12 drives the rubber ring 13 to rotate to straighten the copper wire 6.

[0026] In this embodiment, the wire coil 5 is wound around the side of the central winding post 4. When the feeding mechanism 10 clamps and moves the copper wire 6, the wire coil 5 rotates. When the wire coil 5 rotates, it drives the central winding post 4 and the support platform 3 to rotate, so that this application can automatically feed the wire. When the output platform 11 controls the straightening roller 12 to rotate, the straightening roller 12 contacts the copper wire 6 through the rubber ring 13, so that the copper wire 6 will not be damaged when it is straightened. The copper wire 6 after being straightened by the straightening roller 12 is sent to the cold heading machine for cutting and cold heading.

[0027] Reference Figure 2 and Figure 3 The power mechanism 8 includes a servo motor 801 that provides power. An output shaft 802 is fixedly connected to the top of the servo motor 801. An output gear 803 is fixedly connected to the side of the output shaft 802. A transmission gear 804 meshes with the side of the output gear 803. A rotating gear set 805 meshes with the side of the transmission gear 804 away from the output gear 803. The output shaft 802 and the connecting disc 905 drive the rotating disc 901 inside the adjustment mechanism 9 to rotate. A synchronous pulley 806 is fixedly connected to the bottom end of the side of the output shaft 802. A synchronous belt 807 meshes with the side of the synchronous pulley 806. The two sides of the synchronous belt 807 have the same structure, and the adjustment mechanisms 9 on both sides of the top of the worktable 7 rotate synchronously.

[0028] In this embodiment, when the servo motor 801 starts, it drives the output shaft 802 to rotate. When the output shaft 802 rotates, it drives the transmission gear 804 to rotate through the output gear 803, which in turn causes the rotating gear set 805 to rotate. At this time, the two rotating disks 901 on one side of the worktable 7 rotate, and the rotation of the output shaft 802 drives the rotating disk 901 on the other side to rotate synchronously through the synchronous wheel 806 and the synchronous belt 807. The two adjustment mechanisms 9 on both sides of the top of this application rotate synchronously. Therefore, the two adjustment mechanisms 9 on both sides can perform synchronous feeding to ensure the feeding effect. This application has a simple structure and is convenient for feeding work.

[0029] Reference Figure 4 as well as Figure 5 The adjusting mechanism 9 includes a rotating disk 901 that rotates with the power mechanism 8. A threaded rod 902 is movably connected to the center of the top of the rotating disk 901. A conical block 904 is threadedly connected to the side of the threaded rod 902. An adjusting wheel 903 is fixedly connected to the top of the conical block 904. A connecting disk 905 is fixedly connected to the bottom of the conical block 904. A threaded groove adapted to the threaded rod 902 is opened inside the connecting disk 905. A limiting post 906 is movably connected inside the connecting disk 905. The bottom of the limiting post 906 is fixedly connected to the top of the rotating disk 901. A support rod 907 is fixedly connected to the top of the rotating disk 901. The top of the support rod 907 is fixedly connected to the bottom of the rotating ring 1001 inside the feeding mechanism 10.

[0030] In this embodiment, when the adjusting wheel 903 rotates, it drives the threaded rod 902 to rotate. When the threaded rod 902 rotates, it drives the conical block 904 to move up and down. When the conical block 904 moves up and down, it causes the limiting ball 1003 to move outward or inward, thereby causing the feeding block 1010 to move inward or outward. By adjusting the distance between the two feeding blocks 1010, copper wires 6 of different sizes can be stably clamped and fed. The limiting post 906 restricts the position of the connecting plate 905, so that the connecting plate 905 can only drive the conical block 904 to move up and down. The rotating plate 901 drives the feeding mechanism 10 to move through the support rod 907, so that when the power mechanism 8 outputs, the feeding mechanism 10 can rotate, thereby enabling automatic feeding.

[0031] Reference Figure 4 , Figure 6 , Figure 7 as well as Figure 8The feeding mechanism 10 includes a rotating ring 1001 fixedly connected to the adjusting mechanism 9. A connecting rod 1002 is movably connected inside the rotating ring 1001. A limiting ball 1003 is fixedly connected inside the rotating ring 1001 to the connecting rod 1002. The diameter of the limiting ball 1003 is larger than the diameter of the connecting rod 1002. There are twelve connecting rods 1002. A pad 1004 is fixedly connected inside the rotating ring 1001. The pad 1004 is located outside the connecting rod 1002 and movably connected to it. A first preload spring 1005 is movably connected to the side of the connecting rod 1002. The first preload spring 1005 is located between the limiting ball 1003 and the pad 1004. The side of the pad 1004 near the limiting ball 1003 is flat. The connecting rod 1002 is fixedly connected to the side of the rotating ring 1001 with a limiting frame 1006. The side of the limiting frame 1006 near the limiting ball 1003 is fixedly connected with a limiting rod 1007. The inside of the limiting frame 1006 is movably connected to a cross plate 1008. The side of the cross plate 1008 away from the pad 1004 is fixedly connected to a moving rod 1009. The side of the moving rod 1009 away from the cross plate 1008 is fixedly connected to a feeding block 1010. The side of the feeding block 1010 is movably connected to a second preload spring 1011. The second preload spring 1011 is located between the limiting frame 1006 and the feeding block 1010.

[0032] In this embodiment, when the conical block 904 moves upward, it drives the limiting ball 1003 to move outward and compress the first preload spring 1005. The diameter of the limiting ball 1003 is larger than the diameter of the connecting rod 1002, thus compressing the first preload spring 1005. Therefore, when the conical block 904 moves downward, the inside of the limiting ball 1003 does not contact the conical block 904, and the compressed first preload spring 1005 can be reset, thereby driving the limiting ball 1003 to automatically reset. A pad 1004 is connected inside the rotating ring 1001. The pad 1004 is flat, so that the first preload spring 1005 can be compressed during operation. The retraction and reset are more stable. When the two feeding blocks 1010 rotate, they will contact the copper wire 6. When they first contact, the feeding blocks 1010 will move away from the copper wire 6 and compress the second preload spring 1011, so that the feeding blocks 1010 and the copper wire 6 make flexible contact, avoiding hard contact that could damage the copper wire 6. After the feeding blocks 1010 are compressed, the two feeding blocks 1010 continue to contact the copper wire 6. After compression, the second preload spring 1011 provides sufficient elasticity, so that the two feeding blocks 1010 clamp the copper wire 6. As the feeding blocks 1010 rotate, the copper wire 6 is moved and fed.

[0033] The working principle of this invention is as follows: Before cold heading, the wire coil 5 is wound around the side of the central winding post 4. The copper wire 6 is pulled out from the inside of the wire coil 5. According to the size of the copper wire 6, the adjusting wheel 903 is rotated. When the adjusting wheel 903 rotates, it drives the threaded rod 902 to rotate. When the threaded rod 902 rotates forward and backward, it causes the conical block 904 to move up and down. When the conical block 904 moves upward, the limiting ball 1003, which is in contact with the side of the conical block 904, moves outward and compresses the first preload spring 1005. When the limiting ball 1003 moves, it passes through... The connecting rod 1002 drives the limiting frame 1006 to move. When the limiting frame 1006 moves, the moving rod 1009 and the second pre-compression spring 1011 drive the feeding block 1010 to move. When the conical block 904 moves downward, the limiting ball 1003 that is in contact with the conical block 904 is not pushed outward by the conical block 904. The compressed first pre-compression spring 1005 is reset, thereby causing the limiting ball 1003 to move inward. Therefore, the distance between the two feeding blocks 1010 that are close to each other in the two feeding mechanisms 10 on one side of the top of the worktable 7 changes, so as to adapt to copper wires 6 of different sizes. After the feeding mechanism 10 is adapted to the copper wires 6 of different sizes, the copper wires 6 pass through the feeding block 1010 and the straightening roller 12. The servo motor 801 starts when the servo motor 801 starts, which drives the output shaft 802 to rotate. When the output shaft 802 rotates, it drives the output gear 803 to rotate. When the output gear 803 rotates, it drives the rotating gear set 805 to rotate through the transmission gear 804. When the output gear 803 and the rotating gear set 805 rotate, they drive the two rotating disks 901 above them to rotate. When the output shaft 802 rotates, it drives the synchronous pulley 806 to rotate. When the synchronous pulley 806 rotates, it drives the synchronous belt 807 to rotate, which in turn causes the two rotating disks 901 on the other side of the worktable 7 to rotate synchronously. At this time, the two rotating disks 901 on both sides above the worktable 7 rotate synchronously. When the two rotating disks 901 on each side rotate, the rotation of the rotating disks 901 drives the support rod 907 to rotate, the rotation of the support rod 907 drives the rotating ring 1001 to rotate, and the rotation of the rotating ring 1001 drives the connecting rod 1002 to rotate, thereby causing the limiting frame 1006, the moving rod 1009 and the feeding block 1010 to rotate. When the two feeding blocks 1010 in the two feeding mechanisms 10 rotate, they will come into contact with the copper wire 6. When they first come into contact, the feeding blocks 1010 will move away from the copper wire 6. The second preload spring 1011 is moved and compressed, so that the feeding block 1010 makes flexible contact with the copper wire 6, avoiding hard contact that could damage the copper wire 6. After the feeding block 1010 is compressed, the two feeding blocks 1010 continue to contact the copper wire 6. After compression, the second preload spring 1011 provides sufficient elastic force, so that the two feeding blocks 1010 clamp the copper wire 6. As the feeding block 1010 rotates, the copper wire 6 is moved and fed. When the copper wire 6 is fed by the feeding mechanism 10 to the middle of the upper and lower straightening rollers 12, the straightening rollers 12 contact the copper wire 6 through the rubber ring 13, so that the copper wire 6 will not be damaged when it is straightened. The copper wire 6 after being straightened by the straightening rollers 12 is sent to the cold heading machine for cutting and cold heading.

[0034] In conclusion, the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic feeding device suitable for a cold heading machine, comprising a fixed base (1), characterized in that: The fixed base (1) is fixedly connected to a rotating column (2). The top of the rotating column (2) is movably connected to a support platform (3). The middle of the top of the support platform (3) is fixedly connected to a central winding column (4). A wire coil (5) is wound around the side of the central winding column (4). A copper wire (6) is fixedly connected to the side of the wire coil (5). A feeding mechanism (10) is movably connected to both sides of the copper wire (6). An adjustment mechanism (9) is movably connected inside the feeding mechanism (10). A workbench (7) is movably connected to the bottom of the adjustment mechanism (9). A power mechanism (8) is movably connected inside the workbench (7). The power mechanism (8) controls the adjustment mechanism (9) and the feeding mechanism (10) to rotate. The adjustment mechanism (9) adjusts the distance between the feeding mechanisms (10). The feeding mechanism (10) clamps the copper wire (6) and drives the copper wire (6) to move and feed.

2. The automatic feeding device for a cold heading machine according to claim 1, characterized in that: The workbench (7) has two adjustment mechanisms (9) and a feeding mechanism (10) on both sides of its top. The two feeding mechanisms (10) on each side feed the copper wire (6). A rubber ring (13) is provided on the side away from the wire coil (5). A straightening roller (12) is fixedly connected inside the rubber ring (13). An output machine (11) is movably connected to the side of the straightening roller (12). The straightening roller (12) drives the rubber ring (13) to rotate and straighten the copper wire (6).

3. An automatic feeding device suitable for a cold heading machine according to claim 1, characterized in that: The power mechanism (8) includes a servo motor (801) that provides power. An output shaft (802) is fixedly connected to the top of the servo motor (801). An output gear (803) is fixedly connected to the side of the output shaft (802). A transmission gear (804) meshes with the side of the output gear (803). A rotating gear set (805) meshes with the side of the transmission gear (804) away from the output gear (803). The output shaft (802) and the connecting disc (905) drive the rotating disc (901) inside the adjustment mechanism (9) to rotate.

4. An automatic feeding device suitable for a cold heading machine according to claim 3, characterized in that: A synchronous pulley (806) is fixedly connected to the bottom of the side of the output shaft (802). A synchronous belt (807) is engaged on the side of the synchronous pulley (806). The two sides of the synchronous belt (807) have the same structure, and the adjustment mechanisms (9) on both sides of the top of the worktable (7) rotate synchronously.

5. An automatic feeding device suitable for a cold heading machine according to claim 1, characterized in that: The adjustment mechanism (9) includes a rotating disk (901) that rotates with the power mechanism (8). A threaded rod (902) is movably connected to the center of the top of the rotating disk (901). A conical block (904) is threadedly connected to the side of the threaded rod (902). An adjustment wheel (903) is fixedly connected to the top of the conical block (904). A connecting disk (905) is fixedly connected to the bottom of the conical block (904).

6. An automatic feeding device suitable for a cold heading machine according to claim 5, characterized in that: The connecting plate (905) has a threaded groove inside that matches the threaded rod (902). A limiting post (906) is movably connected inside the connecting plate (905). The bottom end of the limiting post (906) is fixedly connected to the top end of the rotating plate (901). A support rod (907) is fixedly connected to the top end of the rotating plate (901). The top end of the support rod (907) is fixedly connected to the bottom end of the rotating ring (1001) inside the feeding mechanism (10).

7. An automatic feeding device suitable for a cold heading machine according to claim 1, characterized in that: The feeding mechanism (10) includes a rotating ring (1001) fixedly connected to the adjusting mechanism (9). A connecting rod (1002) is movably connected inside the rotating ring (1001). A limiting ball (1003) is fixedly connected inside the rotating ring (1001) to the connecting rod (1002). The diameter of the limiting ball (1003) is larger than the diameter of the connecting rod (1002). The number of connecting rods (1002) is twelve.

8. An automatic feeding device suitable for a cold heading machine according to claim 7, characterized in that: A pad (1004) is fixedly connected inside the rotating ring (1001). The pad (1004) is located outside the connecting rod (1002) and is movably connected to the connecting rod (1002). A first preload spring (1005) is movably connected to the side of the connecting rod (1002). The first preload spring (1005) is located between the limiting ball (1003) and the pad (1004). The side of the pad (1004) near the limiting ball (1003) is flat.

9. An automatic feeding device suitable for a cold heading machine according to claim 8, characterized in that: The connecting rod (1002) is fixedly connected to the side of the rotating ring (1001) with a limiting frame (1006). The side of the limiting frame (1006) near the limiting ball (1003) is fixedly connected with a limiting rod (1007). The inside of the limiting frame (1006) is movably connected with a cross plate (1008). The side of the cross plate (1008) away from the pad (1004) is fixedly connected with a moving rod (1009).

10. An automatic feeding device suitable for a cold heading machine according to claim 9, characterized in that: The moving rod (1009) is fixedly connected to the side away from the cross plate (1008) by a feeding block (1010), and the side of the feeding block (1010) is movably connected to a second preload spring (1011), which is located between the limiting frame (1006) and the feeding block (1010).

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