Stamping mechanism of nut cold header

Abstract

The utility model relates to the technical field of nut processing, and provides a stamping mechanism of a nut cold header, which comprises a worktable, a motor A is fixedly mounted at the bottom of the worktable, a rotating shaft penetrates through and is rotatably connected to the bottom of the worktable, an output shaft of the motor A is fixedly connected with the rotating shaft, an eccentric wheel is fixedly connected to the surface of the rotating shaft, and the eccentric wheel is rotatably connected with the worktable. Through the arrangement of the anti-springback stamping mechanism, when the motor is started to drive the rotating shaft to rotate and the rotating shaft rotates to drive the eccentric wheel to rotate, the stamping head can be driven to move towards the opening direction through the cooperation of an impact block, a sliding block and other assemblies to stamp parts in the stamping groove, and then the stamping head is driven by a reset spring to press the parts in the stamping groove. And through cooperation of an arc-shaped block, a telescopic spring, a speed reduction block and other assemblies, the speed when a reset spring rebounds to drive the sliding block to restore can be reduced, the situation that an impact block impacts the eccentric wheel due to generated inertia is prevented, and the stability of the whole device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nut processing, specifically to a stamping mechanism of a nut cold heading machine. Background Art

[0002] A cold heading machine is a stamping processing machine in mechanical manufacturing. When the raw material remains unchanged (mainly softening or hardening and other similar treatments), the material is formed into the required shape (generally formed into a "step"). The steel used to manufacture fasteners and connectors (such as bolts, nuts, screws, rivets, etc.) by cold heading processing is called cold heading steel, commonly known as rivet screw steel.

[0003] The utility model with the publication number CN215467820U discloses a stamping mechanism of a cold heading machine for nut processing, including a frame. An adjustment box is installed on the frame. The adjustment box is rotatably connected with a runner through an upper rotating shaft and a lower rotating shaft. An adjustment motor is installed on the frame. The output end of the adjustment motor is respectively connected with the upper rotating shaft and the lower rotating shaft through an upper conveyor belt and a lower conveyor belt. Circular boxes are respectively installed at both ends of the adjustment box. A turntable is rotatably connected to the circular box through a rotating motor. A plurality of card slots are opened on the turntable. When the runner impacts the slider in the above application document, the punch is used to punch the nut processing element through the punching port. Then, under the action of the elastic force of the spring, the slider is reset. When the elastic force of the spring drives the slider to reset, it may impact the runner due to inertia, easily causing damage to the device and being not conducive to long-term use. Summary of the Utility Model

[0004] The utility model provides a stamping mechanism of a nut cold heading machine.

[0005] The technical solution of the present utility model is as follows: The stamping mechanism of a nut cold heading machine includes a workbench. A motor A is fixedly installed at the bottom of the workbench. A rotating shaft penetrates and is rotatably connected to the bottom of the workbench. The output shaft of the motor A is fixedly connected to the rotating shaft. An eccentric wheel is fixedly connected to the surface of the rotating shaft. Support plates are fixedly connected to both sides of the workbench. A blanking box is arranged on the top of the support plate. A fixed disk is fixedly connected to the top of the support plate. A blanking hopper is arranged on the top of the fixed disk. A blanking port is opened at the bottom of the fixed disk. An opening is opened on the side of the fixed disk close to the workbench. A turntable is rotatably connected inside the fixed disk. Stamping grooves are opened on both the top and bottom of the turntable. A motor B is arranged on the side of the fixed disk away from the workbench. The output shaft of the motor B is fixedly connected to the turntable. An anti-rebound stamping mechanism is arranged inside the workbench. A grinding mechanism is arranged at the bottom of the workbench; The anti-rebound stamping mechanism includes a sliding block and a decelerating block. The sliding block penetrates and is slidably connected to the side of the workbench. One end of the sliding block is fixedly connected to an impact block. The other end of the sliding block is fixedly connected to a stamping head. Sliding rods are fixedly connected to both the front end and the rear end of the sliding block. The sliding rods penetrate and are slidably connected to the side of the workbench. A return spring is sleeved on the surface of the sliding rods. Sliding cylinders are fixedly connected to both the top and bottom of the sliding block. A telescopic spring is arranged inside the sliding cylinder. An arc-shaped block is slidably connected inside the sliding cylinder through the telescopic spring. The decelerating block is fixedly connected to the inner wall of the workbench.

[0006] The size of the stamping head corresponds to the size of the opening. One end of the impact block away from the sliding block is arc-shaped. The stamping head can punch the parts in the stamping groove through the opening. When the eccentric wheel rotates following the rotating shaft, it will repeatedly hit the arc surface of the impact block, thereby driving the sliding block to move outward from the workbench.

[0007] The arc surface of the arc-shaped block faces the end of the stamping head, and the inner depth of the sliding cylinder is greater than the length of the arc-shaped block. When the arc surface of the arc-shaped block is squeezed, it will move into the sliding cylinder, and the arc-shaped block can be completely retracted into the sliding cylinder.

[0008] One end of the return spring away from the sliding block is initially in contact with the inner side wall of the workbench. When the sliding block moves outward from the workbench, it will drive the sliding rod to move. At this time, the return spring is squeezed and gradually tightened.

[0009] One end of the arc-shaped block away from the telescopic spring is initially close to the decelerating block. When the arc-shaped block moves following the sliding block, it will contact the decelerating block.

[0010] The overall shape of the decelerating block is semi-cylindrical, and the material of the decelerating block is rubber. When the straight surface of the arc-shaped block is squeezed against the semi-cylindrical rubber decelerating block, resistance will be generated to slow down the movement of the sliding block.

[0011] The grinding mechanism includes a pneumatic chamber and a pressing block. The pneumatic chamber penetrates and is fixedly connected to the bottom of the workbench. One end of the pneumatic chamber is provided with an airbag, and a piston inside the other end of the pneumatic chamber is slidably connected to a push rod. The top of the push rod is fixedly connected to a grinding block, and the pressing block is fixedly connected to the surface of the rotating shaft.

[0012] The airbag is in an inflated state in the initial state. The side surface of the grinding block is initially in contact with the end of the impact block away from the sliding block. When the airbag is squeezed, the air pressure inside it will enter the pneumatic chamber and push the push rod to move upward. When the grinding block moves up and down, it will grind the end of the impact block away from the sliding block.

[0013] The top of the grinding block is initially lower than the bottom of the eccentric wheel. When the eccentric wheel rotates, its more protruding part will not hit the grinding block.

[0014] The length of the pressing block is greater than the distance from the surface of the rotating shaft to the airbag. When the pressing block rotates with the rotating shaft, it will repeatedly squeeze the airbag.

[0015] The working principle and beneficial effects of the present utility model are as follows:

[0016] 1. By setting an anti-rebound stamping mechanism, the present utility model achieves that when the motor is started to drive the rotating shaft to rotate, and the rotating shaft rotates to drive the eccentric wheel to rotate, it will also drive the stamping head to move towards the opening direction and stamp the parts in the stamping groove through the cooperation of components such as the impact block and the sliding block. Subsequently, it is driven by the return spring. And through the cooperation of components such as the arc-shaped block, the telescopic spring, and the deceleration block, the speed of the sliding block restored by the return spring can be slowed down when the return spring rebounds, preventing the situation that the impact block hits the eccentric wheel due to the generated inertia, and improving the stability of the overall device.

[0017] 2. By setting a grinding mechanism, when the motor is started to drive the rotating shaft to rotate, and the rotating shaft rotates to drive the eccentric wheel to rotate, it will also drive the grinding block to move up and down repeatedly through the cooperation of components such as the airbag, the pneumatic chamber, and the push rod, and there will be no collision with the eccentric wheel. When the grinding block moves up and down, it will grind the end of the impact block away from the sliding block, making the end of the impact block away from the sliding block smooth and preventing a large resistance when colliding with the eccentric wheel. Description of the Drawings

[0018] The following further elaborates on the present utility model in detail in conjunction with the drawings and specific embodiments.

[0019] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 It is a three-dimensional sectional view of the overall structure of the present utility model;

[0021] Figure 3 This is a three-dimensional sectional view of the structure at the fixed disk of the present utility model;

[0022] Figure 4 This is a three-dimensional schematic diagram of the overall structure of the anti-rebound stamping mechanism of the present utility model;

[0023] Figure 5 This is a three-dimensional sectional view of a partial structure of the anti-rebound stamping mechanism of the present utility model;

[0024] Figure 6 This is a three-dimensional schematic diagram of the structure of the grinding mechanism of the present utility model.

[0025] In the figure: 1, workbench; 2, motor A; 3, rotating shaft; 4, eccentric wheel; 5, support plate; 6, blanking box; 7, fixed disk; 8, blanking hopper; 9, opening; 10, turntable; 11, stamping groove; 12, motor B; 13, blanking port; 14, anti-rebound stamping mechanism; 141, sliding block; 142, impact block; 143, stamping head; 144, sliding rod; 145, return spring; 146, sliding cylinder; 147, telescopic spring; 148, arc-shaped block; 149, deceleration block; 15, grinding mechanism; 151, air pressure chamber; 152, airbag; 153, push rod; 154, grinding block; 155, extrusion block. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in combination with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present utility model.

[0027] Embodiment 1

[0028] As Figures 1 to 5As shown in the figure, this embodiment proposes a stamping mechanism for a nut cold heading machine, including a workbench 1. A motor A2 is fixedly installed at the bottom of the workbench 1. A rotating shaft 3 penetrates and is rotatably connected to the bottom of the workbench 1. The output shaft of the motor A2 is fixedly connected to the rotating shaft 3. An eccentric wheel 4 is fixedly connected to the surface of the rotating shaft 3. Support plates 5 are fixedly connected to both sides of the workbench 1. A blanking box 6 is arranged on the top of the support plate 5. A fixed disk 7 is fixedly connected to the top of the support plate 5. A blanking hopper 8 is arranged on the top of the fixed disk 7. A blanking port 13 is opened at the bottom of the fixed disk 7. An opening 9 is opened on the side of the fixed disk 7 close to the workbench 1. A turntable 10 is rotatably connected to the inside of the fixed disk 7. Stamping grooves 11 are opened on both the top and bottom of the turntable 10. A motor B12 is arranged on the side of the fixed disk 7 away from the workbench 1. The output shaft of the motor B12 is fixedly connected to the turntable 10. An anti-rebound stamping mechanism 14 is arranged inside the workbench 1. A grinding mechanism 15 is arranged at the bottom of the workbench 1; The anti-rebound stamping mechanism 14 includes a sliding block 141 and a deceleration block 149. The sliding block 141 penetrates and is slidably connected to the side of the workbench 1. One end of the sliding block 141 is fixedly connected to an impact block 142. The other end of the sliding block 141 is fixedly connected to a stamping head 143. The size of the stamping head 143 corresponds to the size of the opening 9. The end of the impact block 142 away from the sliding block 141 is arc-shaped. The stamping head 143 can punch the parts in the stamping groove 11 through the opening 9. When the eccentric wheel 4 rotates with the rotating shaft 3, it will repeatedly hit the arc surface of the impact block 142, thereby driving the sliding block 141 to move outward from the workbench 1. Slide rods 144 are fixedly connected to both the front end and the rear end of the sliding block 141. The slide rods 144 penetrate and are slidably connected to the side of the workbench 1. A return spring 145 is sleeved on the surface of the slide rods 144. The end of the return spring 145 away from the sliding block 141 is initially in contact with the inner wall of the workbench 1. When the sliding block 141 moves outward from the workbench 1, it will drive the slide rods 144 to move. At this time, the return spring 145 is gradually compressed and tightened. Slide cylinders 146 are fixedly connected to both the top and bottom of the sliding block 141. A telescopic spring 147 is arranged inside the slide cylinder 146. An arc-shaped block 148 is slidably connected to the inside of the slide cylinder 146 through the telescopic spring 147. The arc surface of the arc-shaped block 148 faces one end of the stamping head 143. And the inner depth of the slide cylinder 146 is greater than the length of the arc-shaped block 148. When the arc surface of the arc-shaped block 148 is squeezed, it will move into the slide cylinder 146. The arc-shaped block 148 can be completely retracted into the slide cylinder 146. The deceleration block 149 is fixedly connected to the inner wall of the workbench 1. The end of the arc-shaped block 148 away from the telescopic spring 147 is initially close to the deceleration block 149. When the arc-shaped block 148 moves with the sliding block 141, it will contact the deceleration block 149. The overall shape of the deceleration block 149 is semi-cylindrical, and the material of the deceleration block 149 is rubber material. When the straight surface of the arc-shaped block 148 is squeezed by the semi-cylindrical rubber deceleration block 149, resistance will be generated to slow down the movement of the sliding block 141.

[0029] In this embodiment, the workpieces required for nut stamping are put into the blanking port 13. The workpieces will fall into the stamping groove 11 at the top of the turntable 10 through the blanking port 13. Then, the motor A2 is turned on. The motor A2 drives the rotating shaft 3 to rotate through its output shaft. When the rotating shaft 3 rotates, it drives the eccentric wheel 4 to rotate. When the eccentric wheel 4 rotates following the rotating shaft 3, it repeatedly hits the arc surface of the impact block 142, thereby driving the sliding block 141 to move outward from the workbench 1. The sliding rod 144 also moves accordingly, and the return spring 145 is tightened. When the sliding block 141 moves outward from the workbench 1, it drives the stamping head 143 to move towards the opening 9 and stamp the workpieces inside the stamping groove 11. Subsequently, when the eccentric wheel 4 rotates to the other end, it hits the impact block 142 at the other end to stamp the workpieces in the stamping groove 11 at the other end. By stamping at both ends respectively, the stamping efficiency is relatively high and the practicability is relatively high. When the return spring 145 rebounds, it drives the sliding block 141 to move reversely and return to its original position. At this time, the motor B12 can be turned on to drive the turntable 10 to rotate so that the stamping groove 11 at the top rotates to the lower part. At this time, the stamped workpieces fall into the blanking box 6, and the originally empty stamping groove 11 at the bottom rotates to the upper part and communicates with the bottom of the blanking hopper 8, and workpieces can be put in. When the sliding block 141 moves outward from the workbench 1, it drives the arc surface of the arc-shaped block 148 to contact the deceleration block 149. At this time, the arc surface of the arc-shaped block 148 is squeezed and retracts into the sliding cylinder 146, and will not generate too much resistance to affect the stamping process when the sliding block 141 moves outward. Subsequently, the telescopic spring 147 rebounds to drive the arc-shaped block 148 to return to its original position. When the return spring 145 rebounds to drive the sliding block 141 to move reversely and return to its original position, the straight surface of the arc-shaped block 148 will be squeezed by the deceleration block 149 to generate a certain resistance, thereby slowing down the speed when the return spring 145 rebounds to drive the sliding block 141 to return to its original position, and preventing the situation that the impact block 142 hits the eccentric wheel 4 due to the generated inertia, and improving the stability of the overall device.

[0030] Embodiment 2

[0031] As Figures 1 to 6As shown in the figure, based on the same concept as in the above-mentioned Embodiment 1, this embodiment also proposes a grinding mechanism 15, which includes a pneumatic chamber 151 and a pressing block 155. The pneumatic chamber 151 penetrates and is fixedly connected to the bottom of the workbench 1. One end of the pneumatic chamber 151 is provided with an airbag 152. Inside the other end of the pneumatic chamber 151, a piston is slidably connected to a push rod 153. The top of the push rod 153 is fixedly connected to a grinding block 154. The airbag 152 is in an inflated state in the initial state. The side surface of the grinding block 154 is in contact with the end of the impact block 142 away from the sliding block 141 in the initial state. When the airbag 152 is squeezed, the air pressure inside it will enter the pneumatic chamber 151 to push the push rod 153 to move upward. When the grinding block 154 moves up and down, it will grind the end of the impact block 142 away from the sliding block 141. The top of the grinding block 154 is lower than the bottom of the eccentric wheel 4 in the initial state. When the eccentric wheel 4 rotates, its more prominent part will not hit the grinding block 154. The pressing block 155 is fixedly connected to the surface of the rotating shaft 3. The length of the pressing block 155 is greater than the distance from the surface of the rotating shaft 3 to the airbag 152. When the pressing block 155 rotates with the rotating shaft 3, it will repeatedly squeeze the airbag 152.

[0032] In this embodiment, when the motor A2 is turned on, the motor A2 drives the rotating shaft 3 to rotate through its output shaft. When the rotating shaft 3 rotates to drive the eccentric wheel 4 to rotate, the rotating shaft 3 rotates to drive the pressing block 155 to rotate. When the pressing block 155 rotates with the rotating shaft 3, it will repeatedly squeeze the airbag 152. When the airbag 152 is squeezed, the air pressure inside it will enter the pneumatic chamber 151 to push the push rod 153 to move upward. The upward movement of the push rod 153 drives the grinding block 154 to move upward. When the airbag 152 rebounds, the air pressure returns to the airbag 152. At this time, the air pressure in the pneumatic chamber 151 drives the push rod 153 and the grinding block 154 to move downward to restore. By repeatedly moving the grinding block 154 up and down, the end of the impact block 142 away from the sliding block 141 will be ground, so that the end of the impact block 142 away from the sliding block 141 remains smooth, preventing a large resistance when colliding with the eccentric wheel 4.

[0033] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. The stamping mechanism of a nut cold heading machine, characterized in that It includes a workbench (1), a motor A (2) is fixedly installed at the bottom of the workbench (1), a rotating shaft (3) penetrates and is rotatably connected to the bottom of the workbench (1), the output shaft of the motor A (2) is fixedly connected to the rotating shaft (3), an eccentric wheel (4) is fixedly connected to the surface of the rotating shaft (3), support plates (5) are fixedly connected to both sides of the workbench (1), a blanking box (6) is arranged on the top of the support plate (5), a fixed disk (7) is fixedly connected to the top of the support plate (5), a blanking hopper (8) is arranged on the top of the fixed disk (7), a blanking port (13) is opened at the bottom of the fixed disk (7), an opening (9) is opened on the side of the fixed disk (7) close to the workbench (1), a turntable (10) is rotatably connected to the inside of the fixed disk (7), stamping grooves (11) are opened on the top and bottom of the turntable (10), a motor B (12) is arranged on the side of the fixed disk (7) away from the workbench (1), the output shaft of the motor B (12) is fixedly connected to the turntable (10), an anti-rebound stamping mechanism (14) is arranged inside the workbench (1), and a grinding mechanism (15) is arranged at the bottom of the workbench (1); The anti-rebound stamping mechanism (14) includes a sliding block (141) and a deceleration block (149), the sliding block (141) penetrates and is slidably connected to the side of the workbench (1), one end of the sliding block (141) is fixedly connected with an impact block (142), the other end of the sliding block (141) is fixedly connected with a stamping head (143), sliding rods (144) are fixedly connected to the front and rear ends of the sliding block (141), the sliding rods (144) penetrate and are slidably connected to the side of the workbench (1), a return spring (145) is sleeved on the surface of the sliding rod (144), sliding cylinders (146) are fixedly connected to the top and bottom of the sliding block (141), a telescopic spring (147) is arranged inside the sliding cylinder (146), an arc-shaped block (148) is slidably connected inside the sliding cylinder (146) through the telescopic spring (147), and the deceleration block (149) is fixedly connected to the inner wall of the workbench (1).

2. The stamping mechanism of the nut cold heading machine according to claim 1, characterized in that, The size of the stamping head (143) corresponds to the size of the opening (9), and one end of the impact block (142) away from the sliding block (141) is arc-shaped.

3. The stamping mechanism of the nut cold heading machine according to claim 2, characterized in that, The arc surface of the arc-shaped block (148) faces one end of the stamping head (143), and the inner depth of the sliding cylinder (146) is greater than the length of the arc-shaped block (148).

4. The stamping mechanism of the nut cold heading machine according to claim 3, characterized in that, One end of the return spring (145) away from the sliding block (141) is in contact with the inner side wall of the workbench (1) in the initial state.

5. The stamping mechanism of the nut cold heading machine according to claim 4, characterized in that, One end of the arc-shaped block (148) away from the telescopic spring (147) is close to the deceleration block (149) in the initial state.

6. The stamping mechanism of the nut cold heading machine according to claim 5, characterized in that, The overall shape of the deceleration block (149) is semi-cylindrical, and the material of the deceleration block (149) is rubber material.

7. The stamping mechanism of the nut cold heading machine according to claim 6, characterized in that, The grinding mechanism (15) includes a pneumatic chamber (151) and a pressing block (155). The pneumatic chamber (151) penetrates and is fixedly connected to the bottom of the workbench (1). One end of the pneumatic chamber (151) is provided with an airbag (152). A piston in the other end of the pneumatic chamber (151) is slidably connected to a push rod (153). The top of the push rod (153) is fixedly connected to a grinding block (154). The pressing block (155) is fixedly connected to the surface of the rotating shaft (3).

8. The stamping mechanism of the nut cold heading machine according to claim 7, characterized in that, The airbag (152) is in an inflated state in the initial state. The side surface of the grinding block (154) is in contact with the end of the impact block (142) away from the sliding block (141) in the initial state.

9. The stamping mechanism of the nut cold heading machine according to claim 8, characterized in that, The top of the grinding block (154) is lower than the bottom of the eccentric wheel (4) in the initial state.

10. The stamping mechanism of the nut cold heading machine according to claim 9, characterized in that, The length of the pressing block (155) is greater than the distance from the surface of the rotating shaft (3) to the airbag (152).

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