A feeding device for mechanical fastener stamping

Abstract

The present application relates to the field of stamping processing, and particularly relates to a feeding device for stamping processing of mechanical fasteners, which comprises a mounting frame and a feeding frame mounted on a machine body, the mounting frame is arranged between the stamping machine body and the feeding frame, a sliding pair is driven and mounted on the mounting frame through a reciprocating driving mechanism, and a pair of grabbing discs are adjustably mounted on the upper part of the sliding pair through a feeding arm to perform a grabbing action. In the present application, the feeding device is composed of the reciprocating driving mechanism, the feeding arm, the grabbing disc and the feeding frame, the feeding arm can grab the workpiece through the positioning block linkage magnetic attraction block mechanism and automatically release, and the feeding frame is linked to realize automatic rising and feeding, so as to realize a simple and fast feeding and discharging mechanism and operation, and the device is provided with a locking plate mechanism, which can avoid mis-stamping when the workpiece is placed abnormally, so as to realize effective feeding operation and improve the operation efficiency.

Description

Technical Field

[0001] This invention relates to the field of stamping technology, and more particularly to a feeding device for stamping mechanical fasteners. Background Technology

[0002] Sheet-shaped workpieces are widely used in mechanical equipment, vehicles, pipeline connections and engineering structures. They are mainly used to connect and fix parts, especially for clamp-type fasteners. They are usually formed by bending sheet metal blanks through stamping dies. They usually need to be stamped by stamping machines to form a structural shape that meets assembly requirements and forms a clamping structure with a certain curvature.

[0003] Currently, in the stamping process of clamp-type fasteners, manual feeding is usually used. This involves an operator holding a sheet blank and placing it in the corresponding position of the stamping die on the stamping machine. The machine then drives the stamping die to complete the bending and forming process. In this process, the manual positioning and loading / unloading operations are quite cumbersome, and the labor intensity is high during continuous stamping, which affects the processing efficiency. Moreover, for ordinary single-station small stamping machines, the investment cost of using automated loading / unloading robotic arms is high. Therefore, there is an urgent need to solve this problem. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a feeding device for stamping mechanical fasteners.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A feeding device for stamping mechanical fasteners includes a mounting frame and a feeding frame mounted on the machine body. The mounting frame is located between the stamping machine body and the feeding frame. A sliding pair is driven and mounted on the mounting frame by a reciprocating drive mechanism. A pair of gripping discs are adjustablely mounted on the upper part of the sliding pair by a feeding arm to perform gripping action. The material gripping tray is movably installed with a positioning block, a magnetic block and a sliding plate. The positioning block is used to form a positioning fit with the sheet workpiece. A connecting plate is provided on the upper part of the positioning block. The connecting plate is rotatably connected to the magnetic block through a connecting rod, so that when the positioning block moves due to the action of the sheet workpiece, it drives the magnetic block to deflect and magnetically hold the sheet workpiece. The material gripping disc is equipped with a locking mechanism, which includes a locking plate that rises vertically as the connecting plate moves. The locking plate is used to restrict the movement of the upper sliding plate of the material gripping disc. When the positioning block moves due to the action of the sheet workpiece, the locking plate and the sliding plate form a locking engagement. A two-hand controller is installed on one side of each sliding plate. The feeding rack is equipped with a lifting plate in the middle. The lifting plate is connected to a guide rod rotatably mounted on one side of the feeding rack via sliding sleeves on both sides to form a lifting drive. The bottom of the guide rod is equipped with a driven gear through a one-way transmission structure. The driven gear is connected to the drive rack on the outer side of the sliding pair to form a transmission engagement.

[0006] Preferably, a mounting frame is installed on one side of the machine body, and a feeding frame and a reciprocating drive mechanism are installed on one side of the mounting frame. A guide groove is provided on the inner side of the mounting frame.

[0007] Preferably, a feeding arm is vertically slidably mounted on the upper part of the sliding pair, and guide pins are rotatably mounted on both outer sides of the feeding arm, with the guide pins forming a limiting sliding fit with the guide groove.

[0008] Preferably, a pair of adjusting blocks are slidably installed in the middle of the feeding arm, and a material gripping plate is installed at the bottom of the adjusting blocks. Adjacent adjusting blocks are connected by adjusting screws. The adjusting screws are rotatably installed in the middle of the feeding arm and adopt a bidirectional thread structure.

[0009] Preferably, a pair of positioning blocks slide at the bottom of the gripping disc. The bottom side of the positioning block is provided with a guide slope and the side wall is provided with a groove structure. The upper part of the positioning block is provided with a connecting plate. The connecting plate is set inside the gripping disc. One end of the connecting plate is rotatably connected to the magnetic block through a connecting rod. The magnetic block is rotatably installed on the bottom wall of the gripping disc.

[0010] Preferably, a connecting rod is rotatably connected to one side of the connecting plate, and a corrugated plate is fixedly installed on the upper part of the other side of the connecting plate. One end of the connecting rod is rotatably connected to the magnetic block. A locking plate is provided above the corrugated plate. The locking plate is vertically slidably installed inside the material gripping disc. Multiple arc-shaped protrusions are provided on the upper part of the corrugated plate. The arc-shaped protrusions and the bottom protrusion of the locking plate form a sliding contact engagement. When the arc-shaped protrusions abut against the bottom end of the locking plate, the locking plate is lifted.

[0011] Preferably, a sliding plate is slidably mounted in the middle of each of the gripping discs via a sliding groove. One end of the sliding plate extends out of the gripping disc and faces the machine body. A two-hand controller is provided on one side of the sliding plate. The two-hand controller is connected to the control system of the machine body. A groove is provided at the bottom of the sliding plate to form a limiting fit with the locking plate.

[0012] Preferably, a reset block is slidably installed at the bottom center of the gripping disc, the top of the reset block is elastically connected to the center of the gripping disc by a spring, and inclined guide plates are provided on both sides of the upper part of the reset block. A guide pin two is provided at the end of the positioning block facing the reset block, and the guide pin two and the inclined surface of the inclined guide plate form a sliding contact engagement.

[0013] Preferably, the feeding rack is equipped with a lifting plate inside, sliding sleeves are installed on both sides of the lifting plate, and a guard plate is installed on the upper part of the lifting plate, forming a material storage area between adjacent guard plates.

[0014] Preferably, guide rods and corresponding guide structures are installed on both sides of the feeding rack. The sliding sleeve and the guide rods and corresponding guide structures form a sliding fit. A guide pin three is installed on one side of the sliding sleeve. One end of the guide pin three extends into the spiral guide groove provided on the surface of the guide rod to form a spiral fit.

[0015] The beneficial effects of this invention are as follows: In this invention, a feeding device is composed of a reciprocating drive mechanism, a feeding arm, a gripping disc, and a feeding frame. The feeding arm can grip the workpiece and automatically release it through a positioning block linked to a magnetic suction block mechanism, and automatically rise and replenish the material in conjunction with the feeding frame, so as to realize a simple and fast loading and unloading mechanism and operation. The device is equipped with a locking plate mechanism, which can prevent accidental impact when the workpiece is placed abnormally, thereby realizing effective feeding operation and improving work efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of a feeding device for stamping mechanical fasteners proposed in this invention; Figure 2 This is a partial structural schematic diagram of a feeding device for stamping mechanical fasteners proposed in this invention; Figure 3 This is a schematic diagram of the mounting structure of the mounting bracket proposed in this invention; Figure 4 This is a schematic diagram of the external structure of the loading arm proposed in this invention; Figure 5 This is a schematic diagram of a partial structure of the loading arm proposed in this invention; Figure 6 This is a schematic diagram of the material gripping disc installation structure proposed in this invention; Figure 7 This is a schematic diagram of the external structure of the material gripping disc proposed in this invention; Figure 8 This is a cross-sectional view of the internal structure of the material gripping disc proposed in this invention; Figure 9 This is a schematic diagram of the positioning block installation structure proposed in this invention; Figure 10 This is a schematic diagram of the positioning block after displacement proposed in this invention; Figure 11 This is a schematic diagram of the locking fit between the locking plate and the sliding plate proposed in this invention; Figure 12 This is a schematic diagram of the feeding rack structure proposed in this invention; Figure 13 This is a schematic diagram of the guide rod structure proposed in this invention; Figure 14 This is a schematic diagram of the sliding sleeve installation structure proposed in this invention.

[0017] In the diagram: 1. Machine body; 2. Mounting frame; 3. Feeding arm; 31. Adjusting screw; 32. Guide pin one; 33. Sliding pair; 34. Drive rack; 4. Feeding frame; 5. Guide groove; 6. Reciprocating drive mechanism; 7. Lifting plate; 8. Gripping plate; 81. Adjusting block; 9. Sliding plate; 91. Two-hand controller; 10. Positioning block; 11. Reset block; 111. Inclined guide plate; 12. Magnetic block; 13. Connecting plate; 14. Guide pin two; 15. Connecting rod; 16. Wave plate; 17. Locking plate; 18. Guide rod; 19. Driven gear; 20. Sliding sleeve; 21. Guide pin three. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Reference Figure 1-5 A feeding device for stamping mechanical fasteners includes a body 1, which is used to perform stamping. A mounting frame 2 is installed on one side of the body 1. A feeding arm 3 is provided on the upper part of the mounting frame 2, and a feeding rack 4 is also installed in the middle of the frame. The feeding arm 3 is used to carry the workpiece in the feeding rack 4 to the stamping area of ​​the body 1.

[0020] Among them, the bottom sides of the mounting frame 2 are provided with reciprocating drive mechanisms 6. The reciprocating drive mechanisms 6 are used to drive the loading arm 3 to generate reciprocating motion in the horizontal direction, so as to realize the cyclic conveying of the workpiece between the picking position and the stamping position. The reciprocating drive mechanism 6 is a common linear reciprocating drive component in this field, which can be any one of the cylinder drive mechanism, electric slide rail drive mechanism, or linear motor drive mechanism. Next, a sliding pair 33 is provided in the middle of the mounting frame 2. The sliding pair 33 and the reciprocating drive mechanism 6 form a driving cooperation. The reciprocating drive mechanism 6 drives the sliding pair 33 to move. The upper part of the sliding pair 33 is slidably mounted with a feeding arm 3.

[0021] Furthermore, guide pins 32 are rotatably mounted on both sides of the outer side of the loading arm 3. The guide pins 32 and the guide grooves 5 opened on the side wall of the mounting frame 2 form a limiting sliding fit to restrict the movement trajectory of the loading arm 3. The guide groove 5 includes a horizontal guide section and inclined guide sections set at both ends. The inclined guide sections correspond to the material picking position and the stamping position, respectively. When the guide pins 32 move to the positions at both ends of the guide groove 5, the height position of the loading arm 3 is changed through the inclined guide sections, so that the loading arm 3 can simultaneously produce lifting and lowering actions during the reciprocating movement.

[0022] Specifically, during the material handling process, the reciprocating drive mechanism 6 drives the loading arm 3 to move toward the material area. When the guide pin 32 enters the inclined area at the end of the guide groove 5, the loading arm 3 descends along the inclined trajectory, so that the gripping disc 8 approaches the workpiece to be processed and completes the gripping. After the gripping is completed, the loading arm 3 moves in the opposite direction and achieves the descent action through the inclined structure at the other end of the guide groove 5, so that the workpiece enters the corresponding position of the stamping die.

[0023] Furthermore, a pair of adjusting blocks 81 are slidably installed in the middle of the feeding arm 3. A gripping disc 8 is installed at the bottom of the adjusting block 81. Adjacent adjusting blocks 81 are connected by adjusting screws 31. The adjusting screws 31 are rotatably installed in the middle of the feeding arm 3. The adjusting screws 31 adopt a bidirectional thread structure. By rotating the adjusting screws 31, the adjacent adjusting blocks 81 will move relative to each other, thereby adjusting the distance between the gripping discs 8.

[0024] Among them, the material gripping disc 8 is used to support and position sheet-like workpieces.

[0025] Reference Figure 6-11 A pair of positioning blocks 10 are provided at the bottom of the gripping disc 8. The positioning blocks 10 can be slidably installed inside the gripping disc 8. The bottom side of the positioning block 10 is provided with a guide slope, and the side wall is provided with a groove structure for limiting the positioning hole of the workpiece.

[0026] Furthermore, the upper part of the positioning block 10 is provided with a connecting plate 13, one end of the connecting plate 13 is rotatably connected to the magnetic block 12 through the connecting rod 15, and the magnetic block 12 is rotatably installed on the bottom wall of the material gripping plate 8. An elastic reset structure is provided between the positioning block 10 and the material gripping disc 8. When the positioning block 10 moves due to the action of the workpiece, the elastic reset structure provides a reset force for the positioning block 10. Next, the magnetic block 12 is used to assist in the adsorption of sheet-shaped workpieces made of ferrous metal. The magnetic block 12 is set in the slot area at the bottom of the gripping disc 8. One end of the magnetic block 12 is rotatably installed inside the slot to form a deflection fulcrum, and the other end is linked to the connecting plate 13 on the upper part of the positioning block 10 through the connecting rod 15. The movement of the positioning block 10 drives the connecting rod 15 to move, so that the magnetic block 12 can deflect relative to the gripping disc 8, thereby realizing the switching between the magnetic adsorption state and the storage state. When not gripping a workpiece, the magnetic block 12 remains in the storage position.

[0027] Furthermore, a connecting plate 13 is installed on the upper part of the positioning block 10. A connecting rod 15 is rotatably connected to one side of the connecting plate 13, and a wave plate 16 is fixedly installed on the upper part of the other side. A locking plate 17 is provided above the wave plate 16. The locking plate 17 is vertically slidably installed inside the gripping disc 8. The upper part of the wave plate 16 is provided with multiple arc-shaped protrusions, which form a sliding contact fit with the bottom boss of the locking plate 17. When the arc-shaped protrusions abut against the bottom end of the locking plate 17, the locking plate 17 is lifted. Next, a sliding plate 9 is slidably mounted in the middle of the gripping disc 8 via a slide groove. One end of the sliding plate 9 extends out of the gripping disc 8 and faces the machine body 1. A two-hand controller 91 is provided on one side of the sliding plate 9. The two-hand controller 91 is connected to the control system of the machine body 1.

[0028] Among them, the two-hand controller 91 is used to detect the synchronous operation status of the operator's two hands. The two sides of the material gripping plate 8 are respectively set with corresponding trigger positions. When the two two-hand controllers 91 are simultaneously subjected to external force and generate displacement, the two-hand controllers 91 send a start signal to the control system of the machine body 1, so that the machine body 1 performs the stamping action.

[0029] Furthermore, physical limiting mechanisms corresponding to the two-hand controller 91 are provided on both sides of the stamping module located in the machine body 1. The physical limiting mechanisms can be structures such as limiting blocks and trigger rods that can abut against the two-hand controller 91. When the material gripping plate 8 moves to the preset stamping position, the two-hand controller 91 abuts against the corresponding physical limiting mechanism, causing the two-hand controller 91 to act, thereby completing the stamping start condition judgment.

[0030] Furthermore, the bottom of the sliding plate 9 is provided with a groove that forms a limiting fit with the locking plate 17. When the locking plate 17 is embedded in the gripping disc 8, the sliding plate 9 remains in a free-moving state. When the locking plate 17 and the sliding plate 9 are engaged, the position of the sliding plate 9 is restricted. An elastic reset structure is installed at the sliding connection between the sliding plate 9 and the material gripping disc 8.

[0031] Furthermore, a reset block 11 is slidably installed at the bottom center of the gripping disc 8. The top of the reset block 11 is elastically connected to the center of the gripping disc 8 via a spring. Inclined guide plates 111 are provided on both sides of the upper part of the reset block 11. Next, the positioning block 10 is provided with a guide pin 2 14 at one end facing the reset block 11. The guide pin 2 14 and the inclined surface of the inclined guide plate 111 form a sliding contact fit. Under natural working conditions, there is a trigger gap between the guide pin 2 14 and the inclined guide plate 111.

[0032] Reference Figure 12-14 The feeding rack 4 has a lifting plate 7 installed inside, and a guard plate is installed on the upper part of the lifting plate 7. Multiple guard plates form a material storage area. The guard plates are installed on the lifting plate 7 in an adjustable manner with fasteners and the trough. The installation position between the guard plates can be adjusted by tightening or loosening the fasteners to change the size of the material storage area.

[0033] Furthermore, guide rods 18 and corresponding guide structures are installed on both sides of the feeding rack 4, and sliding sleeves 20 are installed on both sides of the lifting plate 7. The sliding sleeves 20 and the guide rods 18 form a sliding fit. A guide pin 3 21 is installed on one side of the sliding sleeve 20. One end of the guide pin 3 21 extends into the spiral guide groove provided on the surface of the guide rod 18 to form a spiral fit.

[0034] Furthermore, a driven gear 19 is mounted at the bottom of the guide rod 18 via a one-way bearing, and a drive rack 34 is mounted on one side of the bottom of the sliding pair 33 via a bracket, with the drive rack 34 and the driven gear 19 meshing together.

[0035] Specifically, during the reciprocating motion of the loading arm 3 driven by the reciprocating drive mechanism 6, the drive rack 34 synchronously generates linear displacement with the loading arm 3 and meshes with the driven gear 19. When the drive rack 34 moves along the material picking direction, the driven gear 19 drives the guide rod 18 to rotate synchronously through the one-way bearing. The sliding sleeve 20 generates axial displacement under the constraint of the spiral guide groove on the outside of the guide rod 18, thereby driving the lifting plate 7 to move in the vertical direction, so that the material placed in the loading rack 4 is gradually replenished to the preset picking position. Conversely, the drive rack 34 idles.

[0036] In this embodiment, the control system of the machine body 1 starts the reciprocating drive mechanism 6, which drives the sliding pair 33 to move horizontally along the mounting frame 2 and the guide groove 5, so that the loading arm 3 moves synchronously.

[0037] When the loading arm 3 moves above the loading frame 4, the loading arm 3 descends along the inclined guide section of the guide groove 5, causing the gripping disc 8 to gradually approach the sheet-like workpiece placed inside the lifting plate 7. The positioning block 10 at the bottom of the gripping disc 8 contacts the corresponding positions of the positioning holes on both sides of the sheet-like workpiece. Under the relative action, the positioning block 10 overcomes the force of the elastic reset structure and retracts.

[0038] During this process, the positioning block 10 drives the connecting plate 13 to rotate the connecting rod 15. The connecting rod 15 drives the magnetic block 12 to deflect around its installation position, so that the magnetic block 12 changes from the storage state to the working state. When the magnetic block 12 rotates to the preset position, the magnetic structure on the bottom of the magnetic block 12 contacts the sheet workpiece and uses magnetic attraction to help fix the workpiece, so that the sheet workpiece is kept in the corresponding position of the gripping plate 8.

[0039] Subsequently, the reciprocating drive mechanism 6 reverses its direction, driving the loading arm 3 back to the stamping area of ​​the machine body 1.

[0040] When the gripping disc 8 descends to the corresponding position of the stamping die, the upper surface of the stamping die and the reset block 11 at the bottom of the gripping disc 8 form an abutment relationship.

[0041] Because the reset block 11 is subjected to the force of the mold surface, and the guide pin 14 at one end of the retracted positioning block 10 forms a trigger engagement with the reset block 11, the reset block 11 drives the inclined guide plates 111 on both sides to move. The inclined guide plates 111 and the guide pin 14 on the side of the positioning block 10 form an inclined guide engagement, causing the positioning block 10 to retract further. At this time, the positioning block 10 retracts slightly again and detaches from the workpiece. The magnetic block 12 continues to rotate and generates an angle to detach from the workpiece, thereby releasing the adsorption relationship between the gripping disc 8 and the sheet workpiece, so that the workpiece can be placed on the stamping die.

[0042] During the unloading process, if the sheet workpiece is not correctly placed in the corresponding position of the gripping plate 8, for example, if the workpiece is offset, falls off, or is not gripped, the positioning block 10 cannot be moved by the workpiece, the magnetic block 12 will not deflect, and the wave plate 16 on the connecting plate 13 will not drive the locking plate 17 to rise.

[0043] At this time, the locking plate 17 remains embedded inside the gripping disc 8, and the sliding plate 9 can slide freely.

[0044] When the gripper plate 8 returns to the stamping area, the sliding plate 9 can move to avoid the movement under the action of the physical limiting mechanism of the mold, so that the two controllers 91 cannot reach the preset trigger position at the same time. Therefore, the control system of the machine body 1 will not receive a valid start signal, and the stamping module will not perform the stamping action.

[0045] Conversely, when the sheet workpiece is correctly grasped and stably placed above the stamping die, the positioning block 10 moves under the action of the workpiece, the locking plate 17 locks with the sliding plate 9, and the two hand controllers 91 on both sides of the sliding plate 9 abut against the trigger structures set on both sides of the stamping module of the machine body 1, so that the two hand controllers 91 move synchronously.

[0046] Since the two dual controllers 91 correspond to the positions on both sides of the gripping plate 8, the two dual controllers 91 can be triggered simultaneously and send a stamping start signal to the control system of the machine body 1 only when the sheet workpiece is in the correct placement state and the gripping plate 8 moves to the set stamping position.

[0047] After receiving a valid signal, the control system of the machine body 1 drives the stamping module to perform stamping processing. Simultaneously, the loading arm 3 retracts, repeating the material picking, conveying and unloading process.

[0048] Meanwhile, during the reciprocating motion of the loading arm 3, the drive rack 34 installed at the bottom of the sliding pair 33 moves linearly in sync with the sliding pair 33 and engages with the driven gear 19 installed at the bottom of the guide rod 18.

[0049] Since the driven gear 19 is connected to the guide rod 18 through a one-way bearing, when the drive rack 34 moves in a set direction, the driven gear 19 drives the guide rod 18 to rotate synchronously.

[0050] During the rotation of the guide rod 18, the guide pin 21 on the side of the sliding sleeve 20 moves along the spiral guide groove on the surface of the guide rod 18, causing the sliding sleeve 20 to be displaced along the axial direction of the guide rod 18, and driving the lifting plate 7 to move upward.

[0051] As the lifting plate 7 gradually rises, the sheet-like workpieces placed inside the loading rack 4 are replenished upwards as a whole, so that the uppermost workpiece is always kept at the corresponding material picking height of the gripping plate 8.

[0052] When the drive rack 34 moves in the reverse direction, the power transmission relationship between the driven gear 19 and the guide rod 18 is released due to the action of the one-way bearing. The guide rod 18 will not rotate in the reverse direction, so the lifting plate 7 will not descend with the return movement of the loading arm 3. When it is necessary to refill the material inside the loading rack 4, it can be pulled out to release the limiting relationship between the guide pin 3 21 and the spiral guide groove of the guide rod 18, so that the sliding sleeve 20 can move freely along the guide rod 18, thereby driving the lifting plate 7 to descend to the initial position and completing the reset operation after material replenishment.

[0053] It should be noted that the machine body 1 is the machine body of the stamping press, which is used to install and control the operation of various stamping mechanisms. In addition, the dual-hand controller 91 includes two trigger buttons, control lines and signal connection modules. The two trigger buttons are respectively installed on each sliding plate 9 and can generate a pressing action under the action of the corresponding trigger structure. The control lines are respectively connected to the two trigger buttons and the control system of the body 1, and are used to transmit the trigger signals generated by the two trigger buttons at the same time to the control system of the body 1.

[0054] Next, in this embodiment, the elastic reset structure is used to provide a reset force for the corresponding moving part. Those skilled in the art can select a suitable elastic reset structure according to the actual working conditions, such as a spring assembly or a spring sheet. This structure is a commonly used elastic drive structure in the mechanical field, which aims to generate a restoring force through elastic deformation to push the corresponding part back to its initial position.

[0055] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A feeding device for stamping mechanical fasteners, comprising a mounting bracket (2) and a feeding rack (4) mounted on a machine body (1), characterized in that, The mounting bracket (2) is located between the press body (1) and the feeding rack (4). A sliding pair (33) is installed on the mounting bracket (2) by a reciprocating drive mechanism (6). A pair of gripping discs (8) are adjustablely installed on the upper part of the sliding pair (33) by the feeding arm (3) to perform gripping action. The material gripping disc (8) is movably installed with a positioning block (10), a magnetic suction block (12) and a sliding plate (9). The positioning block (10) is used to form a positioning fit with the sheet workpiece. The upper part of the positioning block (10) is provided with a connecting plate (13). The connecting plate (13) is rotatably connected to the magnetic suction block (12) through a connecting rod (15) so that when the positioning block (10) is moved by the action of the sheet workpiece, it drives the magnetic suction block (12) to deflect and magnetically hold the sheet workpiece. The gripping disc (8) is provided with a locking mechanism, which includes a locking plate (17) that is vertically raised as the connecting plate (13) moves. The locking plate (17) is used to restrict the movement of the upper sliding plate (9) of the gripping disc (8). When the positioning block (10) is moved by the sheet workpiece, the locking plate (17) and the sliding plate (9) form a locking engagement. A two-hand controller (91) is installed on one side of each sliding plate (9). The feeding rack (4) is provided with a lifting plate (7) in the middle. The lifting plate (7) is connected to the guide rod (18) rotatably installed on one side of the feeding rack (4) by sliding sleeves (20) on both sides to form a lifting drive cooperation. The bottom of the guide rod (18) is provided with a driven gear (19) through a one-way transmission structure. The driven gear (19) is connected to the drive rack (34) on the outside of the sliding pair (33) to form a transmission cooperation.

2. The feeding device for stamping mechanical fasteners according to claim 1, characterized in that, A mounting frame (2) is installed on one side of the machine body (1), and a feeding frame (4) and a reciprocating drive mechanism (6) are installed on one side of the mounting frame (2). A guide groove (5) is opened on the inner side of the mounting frame (2).

3. The feeding device for stamping mechanical fasteners according to claim 1, characterized in that, The upper part of the sliding pair (33) is vertically slidably mounted with a feeding arm (3), and the outer sides of the feeding arm (3) are rotatably mounted with guide pins (32), which form a limiting sliding fit with the guide groove (5).

4. A feeding device for stamping mechanical fasteners according to claim 1, characterized in that, A pair of adjusting blocks (81) are slidably installed in the middle of the feeding arm (3). A gripping disc (8) is installed at the bottom of the adjusting block (81). Adjacent adjusting blocks (81) are connected by adjusting screws (31). The adjusting screws (31) are rotatably installed in the middle of the feeding arm (3). The adjusting screws (31) adopt a bidirectional thread structure.

5. A feeding device for stamping mechanical fasteners according to claim 1, characterized in that, The bottom of the gripping disc (8) has a pair of positioning blocks (10) that slide. The bottom side of the positioning block (10) is provided with a guide slope and the side wall is provided with a groove structure. The upper part of the positioning block (10) is provided with a connecting plate (13). The connecting plate (13) is set inside the gripping disc (8). One end of the connecting plate (13) is rotatably connected to the magnetic block (12) through a connecting rod (15). The magnetic block (12) is rotatably installed on the bottom wall of the gripping disc (8).

6. A feeding device for stamping mechanical fasteners according to claim 5, characterized in that, A connecting rod (15) is rotatably connected to one side of the connecting plate (13), and a wave plate (16) is fixedly installed on the upper part of the other side of the connecting plate (13). One end of the connecting rod (15) is rotatably connected to the magnetic block (12). A locking plate (17) is provided above the wave plate (16). The locking plate (17) is vertically slidably installed inside the material gripping disc (8). The upper part of the wave plate (16) is provided with multiple arc-shaped protrusions. The arc-shaped protrusions and the bottom protrusion of the locking plate (17) form a sliding contact fit. When the arc-shaped protrusions abut against the bottom end of the locking plate (17), the locking plate (17) is lifted.

7. A feeding device for stamping mechanical fasteners according to claim 1, characterized in that, Each of the material gripping discs (8) has a sliding plate (9) slidably mounted in the middle via a sliding groove. One end of the sliding plate (9) extends out of the material gripping disc (8) and faces the machine body (1). A two-hand controller (91) is provided on one side of the sliding plate (9). The two-hand controller (91) is connected to the control system of the machine body (1). A groove is provided at the bottom of the sliding plate (9) to form a limiting fit with the locking plate (17).

8. A feeding device for stamping mechanical fasteners according to claim 1, characterized in that, A reset block (11) is slidably installed at the bottom center of the gripping disc (8). The top of the reset block (11) is elastically connected to the center of the gripping disc (8) by a spring. Inclined guide plates (111) are provided on both sides of the upper part of the reset block (11). A guide pin two (14) is provided at one end of the positioning block (10) facing the reset block (11). The guide pin two (14) and the inclined surface of the inclined guide plate (111) form a sliding contact fit.

9. A feeding device for stamping mechanical fasteners according to claim 1, characterized in that, The feeding rack (4) is equipped with a lifting plate (7), and sliding sleeves (20) are installed on both sides of the lifting plate (7). A guard plate is installed on the upper part of the lifting plate (7), and a material storage area is formed between adjacent guard plates.

10. A feeding device for stamping mechanical fasteners according to claim 9, characterized in that, The feeding rack (4) is equipped with guide rods (18) and corresponding guide structures on both sides. The sliding sleeve (20) and the guide rods (18) and corresponding guide structures form a sliding fit. A guide pin three (21) is installed on one side of the sliding sleeve (20). One end of the guide pin three (21) extends into the spiral guide groove set on the surface of the guide rod (18) to form a spiral fit.

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