Plasma cladding equipment for metal parts

Abstract

The invention belongs to the technical field of plasma cladding, and provides a metal part plasma cladding device which comprises a supporting frame, a plasma spray head is arranged in the supporting frame, a nozzle is formed in the bottom of the plasma spray head, and a metal powder cut-off assembly is arranged in the plasma spray head. The metal powder cut-off assembly is used for immediately preventing the metal powder from being sprayed out of the nozzle when cladding is finished; the conveying assembly comprises a conveying belt, a plurality of clamping mechanisms are placed on the conveying belt, the clamping mechanisms are used for clamping workpieces to be machined, positioning pieces are arranged between the clamping mechanisms and the supporting frame, and the positioning pieces are used for fixing one clamping mechanism to the set position in the supporting frame; and the conveying belt penetrates through the preheating box, and the preheating box is used for preheating the to-be-machined workpiece to the set temperature before the to-be-machined workpiece enters the supporting frame. According to the device, feeding, preheating, machining and discharging can be synchronously carried out, and waste of metal powder can be avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of plasma cladding, and in particular relates to plasma cladding equipment for metal parts. Background Art

[0002] Plasma cladding technology utilizes a plasma arc as a heat source to melt the filler metal, fusing it with the base metal to achieve a metallurgical bond. The plasma generated between the tungsten electrode (negative electrode) and the base metal (positive electrode) is used as heat to raise the surface of the workpiece to the operating temperature. Welding powder is then fed into this heat zone, melting it and depositing it on the workpiece surface, strengthening and hardening the surface.

[0003] Existing plasma cladding equipment uses a fixed operating mode, requiring loading, processing, and unloading to be performed in separate steps. This results in long cycle times and low processing efficiency. Existing plasma cladding equipment lacks an integrated preheating system and relies on external heating devices, resulting in significant cooling during workpiece transfer, impacting processing results. Furthermore, traditional powder feeding systems leave residual powder spray for 0.8-1.2 seconds after the arc is turned off, resulting in wasted metal powder and contamination of the workpiece surface. Summary of the Invention

[0004] The object of the present invention is to provide a plasma cladding device for metal parts to solve the above problems.

[0005] To achieve the above object, the present invention provides the following solution: a plasma cladding device for metal parts, comprising:

[0006] A support frame, wherein a plasma shower head is disposed within the support frame, a moving assembly for moving the plasma shower head is disposed between the plasma shower head and the support frame, a nozzle is disposed at the bottom of the plasma shower head, and a metal powder cutting assembly is disposed within the plasma shower head, wherein the metal powder cutting assembly is configured to immediately prevent metal powder from being ejected from the nozzle upon completion of cladding;

[0007] A transmission assembly includes a conveyor belt, the conveyor belt horizontally passing through the support frame, a plurality of clamping mechanisms placed on the conveyor belt, the clamping mechanisms being used to clamp workpieces to be processed, and a positioning member provided between the clamping mechanism and the support frame, the positioning member being used to fix one of the clamping mechanisms at a set position within the support frame;

[0008] A preheating box, wherein the conveyor belt passes through the preheating box, and the preheating box is used to preheat the workpiece to be processed to a set temperature before the workpiece to be processed enters the support frame.

[0009] Preferably, a working head is fixedly connected to the top of the plasma nozzle, and the working head is transmission-connected to the moving assembly. A tungsten electrode is vertically slidably connected inside the plasma nozzle, and the bottom of the tungsten electrode is arranged close to the nozzle. A lifting control component is provided between the tungsten electrode and the working head, and the lifting control component is transmission-connected to the metal powder cutting assembly. A powder feeding channel and a protective gas duct are also provided in the plasma nozzle, and the powder feeding channel is arranged on the outside of the tungsten electrode, and the protective gas duct is located on the outside of the powder feeding channel, and the outlet end of the powder feeding channel is connected to the nozzle, and the outlet end of the protective gas duct is located at the bottom of the plasma nozzle.

[0010] Preferably, the lifting control component includes a ring fixedly mounted on the top of the tungsten electrode, the ring is located in the working head, one side of the ring is vertically fixedly connected to a rack, a gear is engaged on the rack, and the gear transmission is connected to a drive motor.

[0011] Preferably, the metal powder cutting-off assembly includes a sealing plate vertically slidably connected to the plasma nozzle, the top of the sealing plate is fixedly connected to the collar, the bottom of the sealing plate passes through the powder feeding channel, and a through hole is provided at the bottom of the side wall of the sealing plate. When the tungsten pole is in a low position, the through hole is connected to the powder feeding channel, and when the tungsten pole is in a high position, the powder feeding channel is cut off by the sealing plate.

[0012] Preferably, the clamping mechanism includes a clamping plate, one end of the top of the clamping plate is fixedly connected to a fixed plate, the other end of the top of the clamping plate is slidably connected to a movable plate, and an adjusting member is provided between the movable plate and the clamping plate, and the adjusting member is used to adjust the distance between the movable plate and the fixed plate, so as to clamp the workpiece to be processed between the movable plate and the fixed plate.

[0013] Preferably, a plurality of positioning protrusions are fixedly connected to the conveyor belt, and the plurality of positioning protrusions are used to fix the placement position of the fixture plate on the conveyor belt.

[0014] Preferably, the adjusting member includes a screw rod rotatably connected to the clamp plate, a slider is fixedly connected to the bottom of the movable plate, the slider is threadedly sleeved on the screw rod, one end of the screw rod is coaxially rotatably connected to a worm gear, a worm is rotatably connected in the clamp plate, the worm is meshed with the worm gear, and an adjustment handwheel is transmission-connected to the worm rod.

[0015] Preferably, the positioning member includes two groups of slides that are horizontally slidably connected to the two opposite inner walls of the support frame, and telescopic rods are respectively connected to the two slides and the support frame, and the telescopic rods are used to adjust the distance between the two slides. A number of limit pins are respectively fixedly connected horizontally on the opposite side walls of the two slides, and a number of positioning holes are respectively opened horizontally on the two opposite side walls of the clamp plate, and a number of the limit pins are respectively adapted to the number of the positioning holes.

[0016] Preferably, turntables are coaxially connected to the opposite side walls of the fixed plate and the movable plate, and a rotating shaft is rotatably connected inside the fixed plate. One end of the rotating shaft is coaxially fixedly connected to the turntable, and the other end of the rotating shaft passes through the fixed plate and is provided with a spline hole inwardly. A driving motor is fixedly connected to the slide plate near the fixed plate, and the output shaft of the driving motor is coaxially fixedly connected to a spline shaft. When the limiting pin is inserted into the positioning hole, the spline shaft is transmission-connected to the spline hole.

[0017] Preferably, the moving component includes a transverse sliding beam horizontally slidably connected to the top of the support frame, a longitudinal sliding frame horizontally slidably connected to the transverse sliding beam, the longitudinal sliding frame is perpendicular to the sliding direction of the transverse sliding beam, the working head is vertically slidably connected to the longitudinal sliding frame, and the longitudinal sliding frame is used to adjust the height of the working head.

[0018] Compared with the prior art, the present invention has the following advantages and technical effects: Overall, the present invention sets a conveyor belt and makes the conveyor belt pass through the preheating box and the support frame. The conveyor belt can be used to simultaneously transmit multiple workpieces, so that loading, preheating, processing and unloading can be carried out simultaneously. Not only is the preheating box integrated into the cladding equipment, the preheating effect is improved and the processing efficiency is effectively improved. At the same time, by integrating the metal powder cutting component into the cold ion nozzle, the flow stage of the metal powder can be immediately cut off after the cladding is completed, avoiding the waste of metal powder and pollution of the workpiece surface, thereby improving the processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 is a schematic diagram of the cladding equipment of the present invention;

[0021] Figure 2 is a cross-sectional view of a plasma shower head according to the present invention;

[0022] Figure 3 is a schematic diagram of a positioning member of the present invention;

[0023] Figure 4 is a schematic diagram of the clamping mechanism of the present invention;

[0024] Figure 5 It is a front cross-sectional view of the cladding mechanism of the present invention;

[0025] Among them, 1. Support frame; 2. Preheating box; 3. Conveyor belt; 4. Horizontal sliding beam; 5. Longitudinal sliding frame; 6. Working head; 7. Plasma nozzle; 8. Gear; 9. Rack; 10. Ring; 11. Tungsten electrode; 12. Sealing plate; 13. Protective gas duct; 14. Powder feeding channel; 15. Through hole; 16. Nozzle; 17. Drive motor; 18. Slide plate; 19. Telescopic rod; 20. Limit pin; 21. Spline shaft; 25. Fixture plate; 26. Positioning bump; 27. Moving plate; 28. Turntable; 29. ​​Fixed plate; 31. Rotating shaft; 32. Spline hole; 33. Positioning hole; 34. Screw; 35. Slider; 36. Worm gear; 37. Worm. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] In the prior art, there is a plasma cladding device for metal parts, including a support frame, a plasma nozzle and a drive assembly, the support frame is provided with a drive assembly, the drive assembly is connected to the plasma nozzle for plasma cladding the metal parts, the drive assembly is used to drive the plasma nozzle to move, and also includes a first motor, a rotating frame, a first electric push rod, a spline structure, an electric three-jaw chuck, a material discharge frame, a cooler, and a rotating mechanism, the support frame is connected to a first motor for driving the metal parts to rotate, the support frame is rotatably connected to the rotating frame, the output of the first motor The shaft is connected to the rotating frame through a coupling, two first electric push rods are connected to the left part of the rotating frame, and two first electric push rods are also connected to the right part of the rotating frame. The telescopic rods of the first electric push rods are connected with a spline structure, and the spline structure is composed of a spline shaft and a spline sleeve. The spline shaft is slidingly connected to the rotating frame, and the spline sleeve of the spline structure is connected to an electric three-jaw chuck for clamping metal parts. The support frame is connected to a discharge rack for placing metal parts, and a cooler for cooling the metal parts is installed on the discharge rack. The rotating mechanism is used to drive the electric three-jaw chuck to rotate.

[0029] The driving assembly includes a first electric slider and a second electric slider. The first electric slider is slidably connected to the support frame for driving the plasma nozzle to move left and right. The second electric slider is slidably connected to the first electric slider for driving the plasma nozzle to move up and down. The second electric slider is connected to the plasma nozzle.

[0030] The rotating mechanism includes a second motor, a first gear rod and a gear ring. The support frame is connected to the second motor for driving the metal part to rotate. The output shaft of the second motor is connected to the first gear rod through a coupling. The first gear rod is rotatably connected to the support frame. The electric three-jaw chuck is connected to a gear ring, and the two gear rings on the rear side are engaged with the first gear rod.

[0031] It also includes a unloading mechanism for unloading metal parts, the unloading mechanism includes a first connecting block, a sliding block, a first compression spring, a control button and a controller, two first connecting blocks are connected to the support frame, the first connecting blocks are slidably connected to the sliding blocks, two first compression springs are connected between the sliding blocks and the adjacent first connecting blocks, control buttons are installed on the first connecting blocks, and the sliding blocks will contact the adjacent control buttons when moving downward, a controller is installed on the support frame, the control buttons are electrically connected to the controller, and the electric three-jaw chuck and the first electric push rod are also electrically connected to the controller.

[0032] It also includes a limiting mechanism, which includes a first rack, a second rack rod and a second rack. The sliding blocks are connected to the first rack, and the two first connecting blocks are rotatably connected with the second rack rod. The first racks are engaged with the second rack rods. Two second racks for limiting the metal parts are slidably connected to the material rack, and the second racks are engaged with the second rack rods.

[0033] The limiting mechanism also includes a protrusion, and the top of the second rack is connected with a plurality of protrusions at intervals.

[0034] The cam is connected to the left side of the support frame, and the cam is connected to the right side of the support frame. The cam is connected to the second positioning block in a sliding manner, and the two first positioning blocks on the same side are connected to the connecting frame. The second compression spring is connected between the connecting frame and the adjacent second connecting block, and the second compression spring is wound around the outside of the adjacent first positioning blocks. Two second electric push rods are connected to the support frame, and the telescopic rods of the second electric push rods are connected to the adjacent connecting frame. Two second positioning blocks are connected to the left and right sides of the rotating frame. The first positioning blocks will be engaged with the adjacent second positioning blocks when they move toward the side close to each other.

[0035] The electric three-jaw chuck in the above-mentioned plasma cladding equipment can clamp the metal part. When the metal part is located below the plasma nozzle, the metal part can rotate on its own. With the cooperation of the second electric slider and the first electric slider, the metal part can be clad by the plasma nozzle, and the material can continue to be loaded at the same time. While the metal part is cooling, the next metal part can be clad, saving time and improving work efficiency. At the same time, when its sliding block contacts the control button, the control button and the controller can control the claws on the two electric three-jaw chucks on the lower side to release the clad metal part, and control the two first electric push rods on the lower side to drive the two electric three-jaw chucks on the lower side to move away from each other, so that the clad metal part can be automatically unloaded, improving work efficiency. The second rack and the protrusion can limit the metal part to prevent it from falling off the discharge rack.

[0036] Reference Figure 1-Figure 5 The present invention provides a plasma cladding device for metal parts, comprising:

[0037] A support frame 1 is provided with a plasma shower head 7 in the support frame 1. A moving assembly for moving the plasma shower head 7 is provided between the plasma shower head 7 and the support frame 1. A nozzle 16 is provided at the bottom of the plasma shower head 7. A metal powder cutting assembly is provided in the plasma shower head 7. The metal powder cutting assembly is used to immediately prevent metal powder from being ejected from the nozzle 16 upon completion of cladding.

[0038] The transmission assembly includes a conveyor belt 3, which horizontally passes through the support frame 1. A plurality of clamping mechanisms are placed on the conveyor belt 3. The clamping mechanisms are used to clamp workpieces to be processed. Positioning members are provided between the clamping mechanisms and the support frame 1. The positioning members are used to fix a clamping mechanism at a set position within the support frame 1.

[0039] The preheating box 2 and the conveyor belt 3 pass through the preheating box 2. The preheating box 2 is used to preheat the workpiece to be processed to a set temperature before the workpiece to be processed enters the supporting frame 1.

[0040] The main function of the moving component is to change the height and horizontal position of the plasma nozzle 7, so as to facilitate the plasma nozzle 7 to process the surface of the workpiece to be processed; the main function of the nozzle 16 is to facilitate the metal powder and plasma to reach the surface of the workpiece to be processed; the main function of the metal powder cut-off component is to immediately cut off the flow of metal powder when the processing stops, so as to reduce the waste of metal powder; the main function of the conveyor belt 3 is to realize the simultaneous transportation of multiple workpieces to be processed, so as to realize the loading, preheating and cladding processing at the same time; the main function of the clamping mechanism is to clamp the workpiece to be processed; the main function of the positioning member is to automatically position the clamping mechanism at the designed position after the clamping mechanism is conveyed to the support frame 1, so as to ensure that the workpiece to be processed is in the processing position in the support frame 1; the main function of the preheating box 2 is to preheat the workpiece to be processed. On the whole, the present invention sets a conveyor belt and makes the conveyor belt pass through the preheating box and the support frame. The conveyor belt can be used to simultaneously transmit multiple workpieces, so that loading, preheating, processing and unloading can be carried out simultaneously. Not only is the preheating box integrated into the cladding equipment, the preheating effect is improved and the processing efficiency is effectively improved, but also by integrating a metal powder cutting component into the cold ion nozzle, the flow stage of the metal powder can be immediately cut off after the cladding is completed, avoiding waste of metal powder and contamination of the workpiece surface, thereby improving the processing quality.

[0041] To further optimize the solution, the conveyor belt 3 is made of metal.

[0042] A further optimized solution is provided, in which a working head 6 is fixedly connected to the top of the plasma nozzle 7, and the working head 6 is transmission-connected to the moving assembly. A tungsten electrode 11 is vertically slidingly connected inside the plasma nozzle 7, and the bottom of the tungsten electrode 11 is arranged near the nozzle 16. A lifting control component is provided between the tungsten electrode 11 and the working head 6, and the lifting control component is transmission-connected to the metal powder cut-off assembly. A powder feeding channel 14 and a shielding gas duct 13 are also provided in the plasma nozzle 7. The powder feeding channel 14 is arranged on the outside of the tungsten electrode 11, and the shielding gas duct 13 is located on the outside of the powder feeding channel 14. The outlet end of the powder feeding channel 14 is connected to the nozzle 16, and the outlet end of the shielding gas duct 13 is located at the bottom of the plasma nozzle 7.

[0043] like Figure 2 As shown, the shielding gas duct 13 is connected to the inert gas supply device through the working head 6. In this embodiment, argon gas can flow in the shielding gas duct 13. When performing the cladding process, the argon gas is sprayed toward the periphery of the processing area to isolate oxygen.

[0044] The metal powder enters the nozzle 16 through the outlet end of the powder feeding channel 14 and is blown to the surface of the workpiece in the plasma flow.

[0045] To further optimize the solution, the lifting control component includes a ring 10 fixedly mounted on the top of the tungsten electrode 11. The ring 10 is located in the working head 6. A rack 9 is vertically fixedly connected to one side of the ring 10. A gear 8 is engaged with the rack 9, and the gear 8 is connected to a drive motor (not shown in the figure).

[0046] like Figure 2 As shown, at the end of cladding, the driving motor drives the gear 8 to rotate counterclockwise, and the gear 8 drives the rack 9 to rise, thereby driving the collar 10 to rise, and finally the tungsten electrode 11 is lifted up, increasing the distance between the tungsten electrode and the workpiece, which is conducive to the rapid stop of cladding.

[0047] A further optimized solution is that the metal powder cutting assembly includes a sealing plate 12 vertically slidably connected to the plasma nozzle 7, the top of the sealing plate 12 is fixedly connected to the collar 10, the bottom of the sealing plate 12 passes through the powder feeding channel 14, and a through hole 15 is provided at the bottom of the side wall of the sealing plate 12. When the tungsten electrode 11 is in a low position, the through hole 15 is connected to the powder feeding channel 14. When the tungsten electrode 11 is in a high position, the powder feeding channel 14 is cut off by the sealing plate 12.

[0048] like Figure 2The figure shows the cladding process, in which the tungsten electrode 11 and the sealing plate 12 are in a low position, and the through hole 15 is in the powder feeding channel 14, allowing metal powder to flow through the through hole 15 to the outlet of the powder feeding channel 14. When the cladding process is completed, the tungsten electrode 11 is lifted, driving the sealing plate 12 to move upward synchronously. At this time, the through hole 15 moves upward from the powder feeding channel 14, and the bottom of the sealing plate 12 seals the powder feeding channel 14. At this time, the metal powder can be immediately stopped by the sealing plate 12, effectively avoiding the waste of metal powder.

[0049] A further optimized solution is that the clamping mechanism includes a clamping plate 25, one end of the top of the clamping plate 25 is fixedly connected to a fixed plate 29, and the other end of the top of the clamping plate 25 is slidably connected to a movable plate 27, and an adjusting member is provided between the movable plate 27 and the clamping plate 25, and the adjusting member is used to adjust the distance between the movable plate 27 and the fixed plate 29, so as to clamp the workpiece to be processed between the movable plate 27 and the fixed plate 29.

[0050] As a further optimization solution, a plurality of positioning protrusions 26 are fixedly connected to the conveyor belt 3 , and the plurality of positioning protrusions 26 are used to fix the placement position of the fixture plate 25 on the conveyor belt 3 .

[0051] like Figure 5 As shown, by fixing a number of positioning protrusions 26 on the conveyor belt 3, a number of fixture plates 25 placed on the conveyor belt 3 can be placed in an equidistant state. During the stepping movement of the conveyor belt 3, the fixture plates 25 can be accurately placed in the loading position, preheating position, processing position and unloading position in sequence, thereby realizing the simultaneous loading, preheating, processing and unloading.

[0052] To further optimize the solution, the adjusting part includes a screw rod 34 rotatably connected to the clamp plate 25, a slider 35 is fixedly connected to the bottom of the movable plate 27, the slider 35 is threadedly sleeved on the screw rod 34, one end of the screw rod 34 is coaxially rotatably connected to a worm gear 36, a worm 37 is rotatably connected in the clamp plate 25, the worm 37 is meshed with the worm gear 36, and an adjustment handwheel is transmission-connected to the worm 37.

[0053] like Figure 4 As shown, when a workpiece needs to be placed, the adjusting handwheel is first turned to rotate the worm 37. The worm 37 drives the worm wheel 36 to rotate the screw 34. When the screw 34 rotates, the movable plate 27 moves to the right through the thread transmission, increasing the distance between the movable plate 27 and the fixed plate 29. After the workpiece is placed between the fixed plate 29 and the movable plate 27, the adjusting handwheel is turned in the opposite direction to move the movable plate 27 to the left, thereby clamping the workpiece.

[0054] A further optimized solution is that the positioning parts include two groups of slides 18 that are horizontally slidably connected to the two opposite inner walls of the support frame 1, and telescopic rods 19 are respectively transmission-connected between the two slides 18 and the support frame 1. The telescopic rods 19 are used to adjust the distance between the two slides 18, and a number of limit pins 20 are horizontally fixedly connected to the opposite side walls of the two slides 18. A number of positioning holes 33 are horizontally opened on the two opposite side walls of the clamp plate 25, and the number of limit pins 20 are respectively adapted to the number of positioning holes 33.

[0055] like Figure 3-Figure 5 As shown, after one set of clamp plates 25 moves step by step with the conveyor belt 3 into the support frame 1, two sets of telescopic rods 19 push the two slides 18 outward, and allow several limit pins 20 on the two slides 18 to be inserted into several positioning holes 33 on both sides of the clamp plate 25, fixing the clamp plate 25 in the processing position. At the same time, the two slides 18 clamp the clamp plate 25 to fix the position of the clamp plate 25.

[0056] To further optimize the solution, a turntable 28 is coaxially rotatably connected to the opposite side walls of the fixed plate 29 and the movable plate 27, and a rotating shaft 31 is rotatably connected inside the fixed plate 29. One end of the rotating shaft 31 is coaxially fixedly connected to the turntable 28, and the other end of the rotating shaft 31 passes through the fixed plate 29 and is provided with a spline hole 32 inwardly. A driving motor 17 is fixedly connected to the slide plate 18 near the fixed plate 29, and the output shaft of the driving motor 17 is coaxially fixedly connected to the spline shaft 21. When the limit pin 20 is inserted into the positioning hole 33, the spline shaft 21 is transmission-connected to the spline hole 32.

[0057] like Figure 3 and Figure 4 As shown, when machining a circular shape, it is necessary to rotate the workpiece around the axis. Therefore, a turntable 28 is provided on the fixed plate 29 and the movable plate 27, respectively, to allow the workpiece to rotate. At the same time, after the limit pin 20 is inserted into the positioning hole 33, the spline shaft 21 is inserted into the spline hole 32 to achieve a transmission connection between the drive motor 17 and the rotating shaft 31. Therefore, during the machining process, the drive motor 17 can drive the workpiece to be machined to deflect around the axis by a certain angle.

[0058] To further optimize the solution, the moving component includes a transverse sliding beam 4 horizontally connected to the top of the support frame 1, and a longitudinal sliding frame 5 is horizontally connected to the transverse sliding beam 4. The longitudinal sliding frame 5 is perpendicular to the sliding direction of the transverse sliding beam 4, and the working head 6 is vertically connected to the longitudinal sliding frame 5. The longitudinal sliding frame 5 is used to adjust the height of the working head 6.

[0059] like Figure 1As shown, movable driving members are respectively provided between the transverse sliding beam 4 and the supporting frame 1, and between the longitudinal sliding frame 5 and the transverse sliding beam 4. The two sets of movable driving members can respectively drive the transverse sliding beam 4 and the longitudinal sliding frame 5 to slide perpendicularly to each other in the same horizontal plane. At the same time, a lifting driving member is provided between the longitudinal sliding frame 5 and the working head 6, which is used to adjust the height of the working head 6, thereby changing the distance between the nozzle 16 and the workpiece, thereby realizing plasma cladding processing at any position on the surface of the workpiece.

[0060] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0061] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art should fall within the scope of protection defined by the claims of the present invention.

Claims

1. A plasma cladding device for metal parts, characterized in that: include: A support frame (1), wherein a plasma spray head (7) is provided in the support frame (1), a moving assembly for moving the position of the plasma spray head (7) is provided between the plasma spray head (7) and the support frame (1), a nozzle (16) is provided at the bottom of the plasma spray head (7), and a metal powder cutting assembly is provided in the plasma spray head (7), and the metal powder cutting assembly is used to immediately prevent metal powder from being ejected from the nozzle (16) at the end of cladding; A transmission component comprises a conveyor belt (3), wherein the conveyor belt (3) horizontally passes through the support frame (1), a plurality of clamping mechanisms are placed on the conveyor belt (3), the clamping mechanisms are used to clamp workpieces to be processed, and a positioning member is provided between the clamping mechanism and the support frame (1), the positioning member is used to fix one of the clamping mechanisms at a set position within the support frame (1); A preheating box (2), wherein the conveyor belt (3) passes through the preheating box (2), and the preheating box (2) is used to preheat the workpiece to be processed to a set temperature before the workpiece to be processed enters the support frame (1).

2. The plasma cladding equipment for metal parts according to claim 1, characterized in that: The top of the plasma spray head (7) is fixedly connected to a working head (6), and the working head (6) is transmission-connected to the moving assembly. A tungsten electrode (11) is vertically slidably connected inside the plasma spray head (7), and the bottom of the tungsten electrode (11) is arranged close to the nozzle (16). A lifting control component is arranged between the tungsten electrode (11) and the working head (6), and the lifting control component is transmission-connected to the metal powder cutting assembly. A powder feeding channel (14) and a protective gas duct (13) are also provided inside the plasma spray head (7), and the powder feeding channel (14) is arranged outside the tungsten electrode (11), and the protective gas duct (13) is located outside the powder feeding channel (14). The outlet end of the powder feeding channel (14) is communicated with the nozzle (16), and the outlet end of the protective gas duct (13) is located at the bottom of the plasma spray head (7).

3. The plasma cladding equipment for metal parts according to claim 2, characterized in that: The lifting control component includes a collar (10) fixedly sleeved on the top of the tungsten electrode (11), the collar (10) is located in the working head (6), one side of the collar (10) is vertically fixedly connected to a rack (9), the rack (9) is meshed with a gear (8), and the gear (8) is transmission-connected to a drive motor.

4. The plasma cladding equipment for metal parts according to claim 3, characterized in that: The metal powder cutting component includes a sealing plate (12) vertically slidably connected to the plasma nozzle (7), the top of the sealing plate (12) is fixedly connected to the collar (10), the bottom of the sealing plate (12) passes through the powder feeding channel (14), and a through hole (15) is provided at the bottom of the side wall of the sealing plate (12). When the tungsten electrode (11) is in a low position, the through hole (15) is connected to the powder feeding channel (14); when the tungsten electrode (11) is in a high position, the powder feeding channel (14) is cut off by the sealing plate (12).

5. The plasma cladding equipment for metal parts according to claim 1, characterized in that: The clamping mechanism includes a clamping plate (25), one end of the top of the clamping plate (25) is fixedly connected to a fixed plate (29), the other end of the top of the clamping plate (25) is slidably connected to a movable plate (27), and an adjusting member is provided between the movable plate (27) and the clamping plate (25), and the adjusting member is used to adjust the distance between the movable plate (27) and the fixed plate (29), so as to clamp the workpiece to be processed between the movable plate (27) and the fixed plate (29).

6. The plasma cladding equipment for metal parts according to claim 5, characterized in that: A plurality of positioning protrusions (26) are fixedly connected to the conveyor belt (3), and the plurality of positioning protrusions (26) are used to fix the placement position of the fixture plate (25) on the conveyor belt (3).

7. The plasma cladding equipment for metal parts according to claim 5, characterized in that: The adjusting member comprises a screw (34) rotatably connected to the fixture plate (25); a slider (35) is fixedly connected to the bottom of the movable plate (27); the slider (35) is threadedly sleeved on the screw (34); one end of the screw (34) is coaxially rotatably connected to a worm wheel (36); a worm (37) is rotatably connected to the fixture plate (25); the worm (37) is meshed with the worm wheel (36); and an adjusting hand wheel is transmission-connected to the worm (37).

8. The plasma cladding equipment for metal parts according to claim 5, characterized in that: The positioning member comprises two groups of slide plates (18) respectively connected to the two opposite inner walls of the support frame (1) in a horizontal sliding manner, and a telescopic rod (19) is respectively connected to the two slide plates (18) and the support frame (1) in a transmission manner, and the telescopic rod (19) is used to adjust the distance between the two slide plates (18), and a plurality of limiting nails (20) are respectively fixedly connected horizontally on the opposite side walls of the two slide plates (18), and a plurality of positioning holes (33) are respectively opened horizontally on the two opposite side walls of the clamp plate (25), and the plurality of limiting nails (20) are respectively adapted to the plurality of positioning holes (33).

9. The plasma cladding equipment for metal parts according to claim 8, characterized in that: A turntable (28) is coaxially rotatably connected to the opposite side walls of the fixed plate (29) and the movable plate (27), and a rotating shaft (31) is rotatably connected inside the fixed plate (29). One end of the rotating shaft (31) is coaxially fixedly connected to the turntable (28), and the other end of the rotating shaft (31) passes through the fixed plate (29) and is provided with a spline hole (32) inwardly. A driving motor (17) is fixedly connected to the slide plate (18) near the fixed plate (29), and an output shaft of the driving motor (17) is coaxially fixedly connected to a spline shaft (21). When the limiting pin (20) is inserted into the positioning hole (33), the spline shaft (21) is transmission-connected to the spline hole (32).

10. The plasma cladding equipment for metal parts according to claim 2, characterized in that: The moving assembly comprises a transverse sliding beam (4) horizontally slidably connected to the top of the supporting frame (1); a longitudinal sliding frame (5) is horizontally slidably connected to the transverse sliding beam (4); the longitudinal sliding frame (5) is perpendicular to the sliding direction of the transverse sliding beam (4); the working head (6) is vertically slidably connected to the longitudinal sliding frame (5); and the longitudinal sliding frame (5) is used to adjust the height of the working head (6).

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