An electric spark coating device

Abstract

The present invention belongs to the technical field of electric discharge machining, and specifically discloses an electric discharge coating device, which includes a fixed seat and an electric discharge coating gun. A disk is rotatably connected to the top of the fixed seat, and a clamping mechanism for clamping a workpiece is provided on the disk. A servo motor is fixedly connected to the bottom of the fixed seat, and the output end of the servo motor passes through the inside of the fixed seat and is fixedly connected to the bottom of the disk. Support plates are fixedly connected to both sides of the top of the fixed seat, and a fixed box is fixedly connected between the support plates. An inclined block is fixedly connected to the outer wall of the disk. A pair of fixed plates are fixedly connected to the bottom end inside the fixed box, and a transmission rod is rotatably connected between the fixed plates. An upper inclined block is slidably connected through the bottom of the fixed box at a position corresponding to the lower inclined block. Through the mutual cooperation of structures such as the upper inclined block, the lower inclined block, the first gear, and the first rack, the present invention can achieve automatic spiral coating on the upper surface of a circular workpiece, eliminating the need for workers to hold the electric discharge coating gun and coat it circle by circle, saving time and effort.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric discharge machining, and particularly relates to an electric discharge coating device. Background Art

[0002] Electric discharge coating is a process method that uses the spark discharge effect between the electrode material and the surface of the metal part to infiltrate the conductive material (such as WC, TiC) as the spark discharge electrode into the metal surface to form a surface alloying coating layer. That is, it is a technology that directly uses high-density electric energy to coat the metal surface. Electric discharge coating can effectively improve the wear resistance, corrosion resistance, heat resistance, etc. of the part surface without affecting the internal structure and performance of the substrate, and is particularly suitable for local treatment of tooling and large mechanical parts, and is widely used in industries such as motors, electrical appliances, machinery, chemical engineering, and steel rolling.

[0003] The existing electric discharge coating guns are mainly composed of electrodes, nozzles and gun bodies. During the electric discharge coating process of the workpiece, it is impossible to perform large-area coating on the upper surface of some circular workpieces. Therefore, workers need to hold the electric discharge coating gun and draw circles on the circular workpiece for coating bit by bit, which is not only time-consuming and laborious, but also greatly reduces the coating efficiency of the device.

[0004] Therefore, a mobile electric discharge coating device is proposed for the above problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the deficiencies existing in the prior art, and a kind of electric discharge coating device is proposed.

[0006] To achieve the above object, the present invention provides an electric discharge coating device, including a fixed seat and an electric discharge coating gun. A disc is rotatably connected to the top of the fixed seat. A clamping mechanism for clamping the workpiece is provided on the disc. A servo motor is fixedly connected to the bottom of the fixed seat. The output end of the servo motor passes through the inside of the fixed seat and is fixedly connected to the bottom of the disc. Both sides of the top of the fixed seat are fixedly connected with support plates. A fixed box is fixedly connected between the support plates. An inclined block is fixedly connected to the outer wall of the disc. A pair of fixing plates are fixedly connected to the bottom end inside the fixed box. A transmission rod is rotatably connected between the fixing plates. A sliding block is slidably connected through the bottom of the fixed box at a position corresponding to the inclined block. The inclined surface at the bottom of the sliding block is attached to the inclined surface at the top of the inclined block. A chute is opened at the top of the sliding block. A first rack is slidably connected to the inside of the chute. A first gear meshing with the first rack is fixedly connected to the outer wall of the transmission rod at a position corresponding to the first rack. A first spring is fixedly connected between the inside of the chute and the side wall of the first rack;

[0007] A ratchet mechanism for preventing reverse rotation is provided on the outer wall of the transmission rod. A U-shaped frame is fixedly connected to the bottom end inside the fixed box and behind the first rack. An extrusion inclined block is hinged behind the first rack. An inclined groove that fits the inclined surface of the extrusion inclined block is opened at the bottom of the U-shaped frame. A through groove is opened at the middle position of the bottom of the fixed box. A second rack is slidably connected to the top of the through groove and penetrates through the front side of the fixed box. A second gear that meshes with the second rack is fixedly connected to the outer wall of the transmission rod at a position corresponding to the second rack. The electric spark coating gun is arranged below the second rack.

[0008] In the above technical solution, further, a fourth spring is fixedly connected between the top end inside the fixed box and the top of the first rack.

[0009] In the above technical solution, further, limiting plates are fixedly connected to both sides of the first rack, and a second spring is fixedly connected between the limiting plates and the side wall of the extrusion inclined block.

[0010] In the above technical solution, further, the ratchet mechanism includes a ratchet and a ratchet block. The ratchet is fixedly connected to the outer wall of the transmission rod. A recessed groove is opened on the front side of the fixed box. The middle of the ratchet block is rotatably connected to the inside of the groove and the end is engaged with the outer wall of the ratchet. A third spring is fixedly connected between the front side of the fixed box and the top of the ratchet block.

[0011] In the above technical solution, further, a scroll spring is fixedly connected between the side wall of the first gear and the outer wall of the transmission rod.

[0012] In the above technical solution, further, an L-shaped plate is slidably connected to the bottom of the second rack. An installation plate is fixedly connected to the bottom of the L-shaped plate. The electric spark coating gun is bolted to the front side of the installation plate. A screw is threadedly connected to the bottom of the L-shaped plate, and the top end of the screw abuts against the bottom of the second rack.

[0013] In the above technical solution, further, a scale plate is fixedly connected to the bottom of the second rack passing through the through groove. A pointer is fixedly connected to the side wall of the L-shaped plate. A dimension groove is opened at the bottom of the scale plate.

[0014] In the above technical solution, further, the clamping mechanism includes clamping plates. There are a pair of clamping plates. An inwardly recessed adjustment groove is opened at the top of the disc. A bidirectional lead screw is rotatably connected to the inside of the adjustment groove. The bottoms of the clamping plates are threadedly connected to the outer wall of the bidirectional lead screw. A hand wheel is fixedly connected to the side wall of the bidirectional lead screw passing through the disc.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Through the cooperation of the upper inclined block, the lower inclined block, the first gear and the first rack and other structures, the spiral automatic coating on the upper surface of the circular workpiece can be realized, without the need for workers to hold the electric spark coating gun to coat in circles, saving time and effort.

[0017] 2. Through the setting of structures such as screws, L-shaped plates and scale plates, the coating starting position can be flexibly adjusted according to processing requirements, further improving the convenience of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall appearance of the coating device proposed by the present invention;

[0019] Figure 2 It is a schematic diagram of a partially cutaway three-dimensional structure of the front side of the fixing seat proposed by the present invention;

[0020] Figure 3 This is a schematic diagram of the full-section three-dimensional structure of the second rack proposed by the present invention;

[0021] Figure 4 This is a schematic diagram of the overall appearance of the transmission structure proposed by the present invention;

[0022] Figure 5 This is a schematic diagram of the three-dimensional structure of the fixed box provided by the present invention in full cutaway from the side;

[0023] Figure 6 This is a schematic diagram of the full-section three-dimensional structure of the upper inclined block proposed by the present invention;

[0024] Figure 7 This is a schematic diagram of the local enlarged structure of point A proposed by the present invention.

[0025] In the figure: 1, fixed seat; 2, disc; 3, clamping plate; 4, servo motor; 5, support plate; 6, fixed box; 7, lower inclined block; 8, fixed plate; 9, transmission rod; 10, upper inclined block; 11, electric spark coating gun; 12, slide groove; 13, first rack; 14, first gear; 15, first spring; 16, U-shaped frame; 17, extrusion inclined block; 18, inclined groove; 19, through groove; 20, second rack; 21, second gear; 22, limit plate; 23, second spring; 24, ratchet; 25, ratchet block; 26, third spring; 27, fourth spring; 28, L-shaped plate; 29, mounting plate; 30, screw; 31, scale plate; 32, pointer; 33, size groove; 34, two-way lead screw; 35, scroll spring; 36, handwheel. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] As Figures 1-7 shown, an electric spark coating device includes a fixed seat 1 and an electric spark coating gun 11. A disc 2 is rotatably connected to the top of the fixed seat 1. A clamping mechanism for clamping a workpiece is provided on the disc 2. A servo motor 4 is fixedly connected to the bottom of the fixed seat 1. The output end of the servo motor 4 passes through the inside of the fixed seat 1 and is fixedly connected to the bottom of the disc 2. Support plates 5 are fixedly connected to both sides of the top of the fixed seat 1. A fixed box 6 is fixedly connected between the support plates 5. An inclined block 7 is fixedly connected to the outer wall of the disc 2. A pair of fixing plates 8 are fixedly connected to the bottom end inside the fixed box 6. A transmission rod 9 is rotatably connected between the fixing plates 8. A sliding block 10 is slidably connected through the bottom of the fixed box 6 at a position corresponding to the inclined block 7. The inclined surface at the bottom of the sliding block 10 is in contact with the inclined surface at the top of the inclined block 7. A sliding groove 12 is formed at the top of the sliding block 10. A first rack 13 is slidably connected to the inside of the sliding groove 12. A first gear 14 meshing with the first rack 13 is fixedly connected to the outer wall of the transmission rod 9 at a position corresponding to the first rack 13. A first spring 15 is fixedly connected between the inside of the sliding groove 12 and the side wall of the first rack 13;

[0028] A ratchet mechanism for preventing reverse rotation is provided on the outer wall of the transmission rod 9. A U-shaped frame 16 is fixedly connected to the bottom end inside the fixed box 6 and located behind the first rack 13. An extrusion inclined block 17 is hinged to the back side of the first rack 13. An inclined groove 18 in contact with the inclined surface of the extrusion inclined block 17 is formed at the bottom of the U-shaped frame 16. A through groove 19 is formed at the middle position of the bottom of the fixed box 6. A second rack 20 is slidably connected to the top of the through groove 19 and penetrates through the front side of the fixed box 6. A second gear 21 meshing with the second rack 20 is fixedly connected to the outer wall of the transmission rod 9 at a position corresponding to the second rack 20. The electric spark coating gun 11 is arranged below the second rack 20. A fourth spring 27 is fixedly connected between the top end inside the fixed box 6 and the top of the first rack 13. Limiting plates 22 are fixedly connected to both sides of the first rack 13. A second spring 23 is fixedly connected between the limiting plates 22 and the side wall of the extrusion inclined block 17;

[0029] When coating the upper surface of a circular workpiece, first clamp the workpiece on the disc 2 through the clamping mechanism. Then, control the servo motor 4 to start and drive the disc 2 to rotate, and at the same time drive the lower inclined block 7 to rotate. When the lower inclined block 7 rotates one circle, it will squeeze the upper inclined block 10 upward, and then drive the first rack 13 to slide upward. Thus, through the squeezing of the inclined groove 18 on the squeezing inclined block 17, at this time, the side wall of the first rack 13 will limit the downward flipping position of the squeezing inclined block 17. Therefore, when the squeezing inclined block 17 slides to the side wall of the U-shaped frame 16, it will squeeze the first rack 13 to slide to the meshing position with the first gear 14, and at the same time stretch the first spring 15. Subsequently, through the continuous movement of the first rack 13, it will drive the meshing first gear 14 to rotate, and at the same time compress the fourth spring 27. Then, through the transmission rod 9, it will drive the second gear 21 on the other side to rotate, and further drive the meshing second rack 20 to move. Thus, by rotating the disc 2 one circle, the electric spark coating gun 11 is driven to move a part. Repeating this process can achieve the full coating of the workpiece;

[0030] Meanwhile, when the lower inclined block 7 moves out and releases the extrusion on the upper inclined block 10, at this time, the squeezing inclined block 17 slides to the top of the U-shaped frame 16. Then, through the pulling force of the first spring 15, the first rack 13 slides out of the meshing position with the first gear 14. Then, through the elastic force of the fourth spring 27, the first rack 13 is pushed downward. At the same time, the side wall of the U-shaped frame 16 will squeeze the squeezing inclined block 17 to turn over, and at the same time stretch the second spring 23 to prevent the first rack 13 from driving the first gear 14 to rotate during the return journey. Subsequently, when the first rack 13 returns to its original position, it will drive the squeezing inclined block 17 to slide out of the extrusion position with the U-shaped frame 16. Then, through the elastic force of the second spring 23, the squeezing inclined block 17 is pulled to turn over and reset.

[0031] To prevent the reverse rotation of the first gear 14 from affecting the stability of the adjusted electric spark coating gun 11, the ratchet mechanism includes a ratchet 24 and a ratchet block 25. The ratchet 24 is fixedly connected to the outer wall of the transmission rod 9. A recessed groove is provided on the front side of the fixed box 6. The middle of the ratchet block 25 is rotatably connected to the inner side of the groove and the end is engaged with the outer wall of the ratchet 24. A third spring 26 is fixedly connected between the front side of the fixed box 6 and the top of the ratchet block 25. When the first rack 13 drives the first gear 14 to rotate, the ratchet 24 will be driven to rotate simultaneously through the transmission rod 9. Since one end of the tooth block of the ratchet 24 is arc-shaped, when the ratchet 24 rotates, it will drive the ratchet block 25 to slide out of the engagement position. Subsequently, when the first gear 14 stops rotating, the ratchet block 25 will continue to be stuck in the tooth groove to ensure that the first gear 14 and the ratchet 24 will not rotate in reverse,

[0032] A scroll spring 35 is fixedly connected between the side wall of the first gear 14 and the outer wall of the transmission rod 9. Thus, after the workpiece coating is completed, the ratchet block 25 can be pressed downward. Since the middle of the ratchet block 25 is hinged in the groove, and when the first gear 14 rotates, the scroll spring 35 will be gradually compressed, and then the third spring 26 will be stretched, thereby driving the ratchet block 25 at the other end to slide out of the engagement position. Subsequently, the first gear 14 will be driven to reverse by the elastic force of the scroll spring 35, and then drive the electric spark coating gun 11 to reset. Finally, when the ratchet block 25 is released, the ratchet block 25 will be pulled back to its original position by the elastic force of the third spring 26, and at the same time, the other end of the ratchet block 25 will be driven to snap into the outer wall of the ratchet wheel 24.

[0033] In order to facilitate the flexible adjustment of the coating starting position according to the processing requirements, an L-shaped plate 28 is slidably connected to the bottom of the second rack 20. The bottom of the L-shaped plate 28 is fixedly connected with a mounting plate 29. The electric spark coating gun 11 is bolted to the front side of the mounting plate 29. A screw 30 is threadedly connected to the bottom of the L-shaped plate 28, and the top of the screw 30 abuts against the bottom of the second rack 20. When the position of the electric spark coating gun 11 needs to be adjusted, first use a tool to screw out the screw 30 to relieve the extrusion of the bottom of the second rack 20, then the L-shaped plate 28 can be slid on the bottom of the second rack 20 to move, so as to realize the position adjustment of the electric spark coating gun 11. After the adjustment is completed, use a tool to tighten the screw 30 in the reverse direction to squeeze the bottom of the second rack 20.

[0034] In order to facilitate the precise adjustment of the position of the electric spark coating gun 11, a scale plate 31 is fixedly connected to the bottom of the second rack 20 through a through groove 19. A pointer 32 is fixedly connected to the side wall of the L-shaped plate 28. A dimension groove 33 is opened at the bottom of the scale plate 31. When sliding the L-shaped plate 28 to adjust the position of the electric spark coating gun 11, the position of the pointer 32 on the dimension groove 33 can be observed to know the specific position of the adjustment of the electric spark coating gun 11.

[0035] In order to facilitate the clamping and fixing of workpieces of different sizes, the clamping mechanism includes clamping plates 3. There are a pair of clamping plates 3. An inwardly recessed adjustment groove is opened at the top of the disc 2. A bidirectional lead screw 34 is rotatably connected to the inner side of the adjustment groove. The bottoms of the clamping plates 3 are both threadedly connected to the outer wall of the bidirectional lead screw 34. A hand wheel 36 is fixedly connected to the side wall of the bidirectional lead screw 34 passing through the disc 2. When clamping and fixing a circular workpiece, first place the workpiece between the clamping plates 3 on the disc 2, and then rotate the hand wheel 36 to drive the bidirectional lead screw 34 to rotate, thereby driving the two clamping plates 3 connected by threads to move towards each other to clamp and fix both sides of the workpiece. When taking out, rotate the hand wheel 36 in the reverse direction.

[0036] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, various changes and improvements will occur to the present invention, and all these changes and improvements fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. An electrospark coating device, comprising a fixing seat (1) and an electrospark coating gun (11), characterized in that: The top of the fixed seat (1) is rotatably connected to a disc (2), and a clamping mechanism for clamping a workpiece is provided on the disc (2). The bottom of the fixed seat (1) is fixedly connected to a servo motor (4), and the output end of the servo motor (4) passes through the inside of the fixed seat (1) and is fixedly connected to the bottom of the disc (2). Support plates (5) are fixedly connected to both sides of the top of the fixed seat (1), and a fixed box (6) is fixedly connected between the support plates (5). A lower inclined block (7) is fixedly connected to the outer wall of the disc (2), and a pair of fixed plates (8) are fixedly connected to the bottom end of the fixed box (6). The fixed plates (8) are rotatably connected to each other. A transmission rod (9) is connected, an upper inclined block (10) is slidably connected to the bottom of the fixed box (6) and the position corresponding to the lower inclined block (7), the inclined surface of the bottom of the upper inclined block (10) fits the inclined surface of the top of the lower inclined block (7), a slide groove (12) is provided at the top of the upper inclined block (10), a first rack (13) is slidably connected to the inner side of the slide groove (12), a first gear (14) meshing with the first rack (13) is fixedly connected to the outer wall of the transmission rod (9) and the position corresponding to the first rack (13), and a first spring (15) is fixedly connected between the inner side of the slide groove (12) and the side wall of the first rack (13); The outer wall of the transmission rod (9) is provided with a ratchet mechanism for preventing reverse rotation; a U-shaped frame (16) is fixedly connected to the inner bottom end of the fixed box (6) and located at the rear side of the first rack (13); an extrusion bevel block (17) is hingedly connected to the rear side of the first rack (13); an inclined groove (18) is provided at the bottom of the U-shaped frame (16) and is fitted with the inclined surface of the extrusion bevel block (17); a through groove (19) is provided at the middle position of the bottom of the fixed box (6); a second rack (20) is slidably connected to the top of the through groove (19) and is arranged through the front side of the fixed box (6); a second gear (21) meshing with the second rack (20) is fixedly connected to the outer wall of the transmission rod (9) and is located at a position corresponding to the second rack (20); and the electric spark coating gun (11) is arranged below the second rack (20).

2. The electrospark coating device according to claim 1, characterized in that: A fourth spring (27) is fixedly connected between the top end of the fixed box (6) and the top of the first rack (13).

3. The electrospark coating device according to claim 1, characterized in that: Both sides of the first rack (13) are fixedly connected to a limit plate (22), and a second spring (23) is fixedly connected between the limit plate (22) and the side wall of the extrusion bevel block (17).

4. The electrospark coating device according to claim 1, characterized in that: The ratchet mechanism comprises a ratchet (24) and a ratchet block (25); the ratchet (24) is fixedly connected to the outer wall of the transmission rod (9); an inwardly recessed groove is provided on the front side of the fixed box (6); the middle part of the ratchet block (25) is rotatably connected to the inner side of the groove and the end part is engaged with the outer wall of the ratchet (24); a third spring (26) is fixedly connected between the front side of the fixed box (6) and the top of the ratchet block (25).

5. The electrospark coating device according to claim 1, characterized in that: A spiral spring (35) is fixedly connected between the side wall of the first gear (14) and the outer wall of the transmission rod (9).

6. The electrospark coating device according to claim 1, characterized in that: The bottom of the second rack (20) is slidably connected to an L-shaped plate (28), the bottom of the L-shaped plate (28) is fixedly connected to a mounting plate (29), the electric spark coating gun (11) is bolted to the front side of the mounting plate (29), the bottom of the L-shaped plate (28) is threadedly connected to a screw (30), and the top of the screw (30) is against the bottom of the second rack (20).

7. The electrospark coating device according to claim 6, characterized in that: The bottom of the second rack (20) passes through the through slot (19) and is fixedly connected to a scale plate (31), the side wall of the L-shaped plate (28) is fixedly connected to a pointer (32), and the bottom of the scale plate (31) is provided with a size slot (33).

8. The electrospark coating device according to claim 1, characterized in that: The clamping mechanism comprises a clamping plate (3), a pair of the clamping plates (3) are provided, the top of the disc (2) is provided with an inwardly recessed adjustment groove, the inner side of the adjustment groove is rotatably connected to a bidirectional screw rod (34), the bottom of the clamping plate (3) is threadedly connected to the outer wall of the bidirectional screw rod (34), and the side wall of the bidirectional screw rod (34) passes through the disc (2) and is fixedly connected to a hand wheel (36).

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