Electric arc spray gun

An arc spray gun technical field

[0001] The present invention relates to the technical field of target production equipment, and in particular to an arc spray gun.

Background technique

[0002] Arc spraying is generally used in the field of surface treatment, but in some cases, it can be used to produce targets. For example, in the production of zinc-tin target, zinc wire and tin wire can be used directly. The zinc wire and tin wire are melted and atomized with an arc spray gun, and sprayed on the surface of the stainless steel back tube to form a target. Compared with plasma spraying produced by tin powder, it has the advantages of low cost and high efficiency.

[0003] The patent application number 201810571661.8 discloses an atomizing arc spray gun, including an atomizing nozzle, a mounting seat and a housing. A motor and a gearbox are installed inside the housing. The output end of the gearbox is connected with two shafts. The wire feed roller is also installed on the top of the gearbox through the compression nut. The wire feed roller can convey the metal wire to the atomizing nozzle. The two metal wires contact and melt at the atomization nozzle and are atomized by compressed air before spraying. out. If the zinc-tin target is sprayed with this atomizing arc spray gun, the two wire feed rollers connected to the gearbox can respectively transport zinc wire and tin wire. The zinc wire and tin wire contact and melt at the atomizing nozzle and are atomized by compressed air The target is formed by spraying on the surface of the stainless steel back tube. However, there are many kinds of zinc-tin target materials (that is, zinc-tin targets can be divided into many kinds according to the composition), such as zinc 85 tin 15, zinc 70 tin 30 and zinc 50 tin 50, etc., and the atomizing arc The spray gun has only one motor and gearbox. The speed of the wire feed rollers connected to the two output ends of the gearbox is the same and cannot be adjusted separately. As a result, the wire feeding amount of zinc wire and tin wire cannot be adjusted separately, so the atomized spray gun cannot Meet the needs of actual production.

Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an arc spray gun in view of the above-mentioned technical deficiencies. The servo motor and gearbox are provided on both sides of the gun body bracket, and each gearbox can be driven independently. The wire feeding roller rotates to adjust the wire feeding speeds of two different metal wires to meet the needs of target production; a wheel shifting device is installed on the gun body bracket, and the wheel shifting device can push the wire feeding roller along the central axis. Axial movement, so as to avoid the situation that the diameter of the wire feeding roller becomes significantly smaller and the wire feeding speed becomes slower than the set speed caused by severe wear at a certain part of the wire feeding roller.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an arc spray gun, including a gun body bracket, one end of the gun body bracket is provided with a fixed block, one end of the fixed block is provided with a spray head, so Side plates are provided on both sides of the gun body support, the side plates are provided with a first gearbox and a first servo motor, the output shaft of the first gearbox is connected with a first bevel gear, and the gun body support A first central shaft is rotatably connected to both sides of the first central shaft at a position above the side plate, one end of the first central shaft is provided with a second bevel gear meshing with the first bevel gear, and the other end of the first central shaft slides A wire feed roller is connected, the gun body bracket is slidably connected with a pressing device above the first central shaft, one side of the pressing device is rotatably connected with a second central shaft, and the second central shaft is slidably connected There is a wire feeding roller, a compression nut is arranged above the pressing device, two front wire guide tubes are arranged on the end of the gun body bracket away from the nozzle, and two rear wire guide tubes are arranged on both sides of the fixed block.

[0006] This technical solution is further optimized, one end of the first central shaft is provided with a first guide bar and a first threaded portion, and the second central shaft is provided with a second guide bar and a second threaded portion, the The wire feed roller is provided with a center hole, so

A guide groove is provided on one side of the central hole, an annular groove is provided on one side of the wire feed roller, and a nut is threadedly connected to the first threaded portion and the second threaded portion.

[0007] The technical solution is further optimized, and further includes a wheel shifting device, the wheel shifting device is fixed between the gun body bracket and the fixed block, the wheel shifting device includes a pushing device, one side of the pushing device is provided with a first Two gearboxes and a second servo motor. The pushing device includes a box body. A fourth central shaft is rotatably connected to the inside of the box body. One end of the fourth central shaft is connected to the output shaft of the second gearbox. The body is rotatably connected with a third central shaft and a fifth central shaft at the positions on the left and right sides of the fourth central shaft, the fourth central shaft is provided with a second gear, and the third central shaft and the fifth central shaft are mounted on the A first gear and a third gear meshed with a second gear are respectively provided, and a first tooth plate and a second tooth plate are respectively provided on the third central shaft and the fifth central shaft. The upper and lower sides of the four central shafts are respectively slidably connected with a first pusher and a second pusher. The first pusher and the second pusher are both provided with a rack portion, and the rack portion can be connected to the first tooth. The plates or the second tooth plates are engaged, and both ends of the first pushing member and the second pushing member are provided with forks, and the forks are located in the annular groove.

[0008] This technical solution is further optimized, the first tooth plate and the second tooth plate have the same structure, and the first tooth plate and the second tooth plate are a complete gear with more than half of the sector shape obtained. The orientation of the plate and the second tooth plate differ by 180°.

[0009] This technical solution is further optimized, and the central angle of the first tooth plate and the second tooth plate is 175 °.

[0010] This technical solution is further optimized, the pressing device is provided with a through hole, two sides of the gun body bracket are provided with uprights, and the uprights are located in the through holes, and the top of the upright is provided with a threaded part, the threaded The part is threadedly connected with a compression nut, and a spring is arranged between the compression nut and the compression device.

[0011] This technical solution is further optimized, the lower part of the gun body bracket 1 is provided with a mounting seat 11.

[0012] Compared with the prior art, the present invention has the following advantages: 1. Two servo motors and gearboxes are used to drive the two wire feeding rollers to rotate respectively, so that the wire feeding speeds of two different wires can be adjusted respectively. To meet the needs of target production, it can produce a variety of binary targets with different compositions; 2. The wheel shift device can push the wire feeding roller to move along the axial direction of the central axis, and the surface of the wire feeding roller is relatively uniformly worn. There are different depths of wear scars, and the wear speed is reduced, so as to avoid the situation that the diameter of the wire feed roller is significantly reduced and the wire feed speed is significantly slower than the set speed caused by the severe wear of the wire feed roller. Make the composition of the target meet the requirements.

Description of the drawings

[0013] FIG. 1 is a rear axial side view of an arc spray gun.

[0014] FIG. 2 is an upper axial side view of an arc spray gun.

[0015] FIG. 3 is a schematic view of the structure of the first central shaft and the wire feed roller of an arc spray gun.

[0016] FIG. 4 is a schematic structural view of a compression device of an arc spray gun.

[0017] FIG. 5 is a cross-sectional view of an arc spray gun.

[0018] FIG. 6 is a schematic structural view of a wheel shifting device of an arc spray gun.

[0019] FIG. 7 is a schematic structural view of a pushing device of an arc spray gun.

[0020] In the figure: 1. Gun body bracket; 11, mounting seat; 12, side plate; 13, front wire guide tube; 14, rear guide wire tube; 2, first servo motor; 21, first gearbox; 22 , The first bevel gear; 3. the first central shaft; 31, the second bevel gear; 32, the wire feed roller; 321, the ring groove; 322, the center hole; 323, the guide groove; 33, the nut; 34, the first guide Article 35. The first threaded part; 4. Compression device; 41. Through hole; 42, the second central shaft; 421. The second guide bar; 422. The second threaded part; 5. Compression nut; Nozzle; 7, shift

Wheel device; 71, the second servo motor; 72, the second gearbox; 73, the pushing device; 731, the box body; 732, the third central shaft; 7321, the first gear; 7322, the first gear plate; 733, the first Four central shafts; 7331 second gear; 734, fifth central shaft; 7341, third gear; 7342, second gear plate; 735, first pushing member; 736, second pushing member; 7361, rack part; 7362. Fork; 8. Fixing block; 9. Connecting block.

Detailed ways

[0021] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary, and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily obscuring the concept of the present invention.

[0022] Specific implementation:

[0023] As shown in conjunction with Figures 1-7, an arc spray gun includes a gun body bracket 1, one end of the gun body bracket 1 is provided with a fixed block 8, and the lower part of the fixed block 8 is provided with a compressed air connector, the fixed block 8 is provided with a spray head 6 at one end, a side plate 12 is provided on both sides of the gun body bracket 1, and a first gearbox 21 and a first servo motor 2 are provided on the side plate 12. The output shaft is connected with the first bevel gear 22, the two sides of the gun body bracket 1 are rotatably connected with the first central shaft 3 at the position above the side plate 12, and one end of the first central shaft 3 is provided with the first umbrella The second bevel gear 31 meshed with the gear 22, the other end of the first central shaft 3 is slidably connected with a wire feed roller 32, and the gun body bracket 1 is slidably connected with a pressing device 4 above the first central shaft 3 A second central shaft 42 is rotatably connected to one side of the pressing device 4, a wire feed roller 32 is also slidably connected to the second central shaft 42, and a pressing nut 5 is provided above the pressing device 4 , The gun body bracket 1 is provided with two front wire guide tubes 13 at one end away from the spray head 6, and a rear wire guide tube 14 is provided on both sides of the fixed block 8, and the rear wire guide tube 14 is connected to the electrical connection block 9 . The connection block 9 is in communication with the power source of the arc spraying system. The first servo motor 2 is electrically connected with the controller of the arc spraying system. The two first servo motors 2 can rotate at different speeds, so that the two first The speed of the wire feeding roller 32 on the mandrel 3 is different, resulting in different wire feeding speeds.

[0024] Preferably, one end of the first central shaft 3 is provided with a first guide bar 34 and a first threaded portion 35, and the second central shaft 42 is provided with a second guide bar 421 and a second threaded portion 422 The wire feed roller 32 is provided with a central hole 322, one side of the central hole 322 is provided with a guide groove 323, one side of the wire feed roller 32 is provided with an annular groove 321, and the first threaded portion 35 A nut 33 is threadedly connected to the second threaded portion 422. The connection structure of the wire feed roller 32 and the first central shaft 3 is: the first central shaft 3 is located in the central hole 322 and the first guide bar 34 is located in the guide groove 323, so that the wire feed roller 32 can follow the first central shaft 3 rotates and can slide along it; the connection structure of the wire feed roller 32 and the second central shaft 42 is: the second central shaft 42 is located in the central hole 322 and the second guide bar 421 is located in the guide groove 323, so that the wire is fed The roller 32 can drive the second central shaft 42 to rotate and slide along it.

[0025] Preferably, the arc spray gun further includes a wheel shifting device 7, the wheel shifting device 7 is fixed between the gun body bracket 1 and the fixed block 8, the wheel shifting device 7 includes a pushing device 73, the pushing device One side of 73 is provided with a second gearbox 72 and a second servo motor 71, and the second servo motor 71 is electrically connected to the controller of the arc spraying system. The pushing device 73 includes a box body 731, a fourth central shaft 733 is rotatably connected to the inside of the box body 731, and one end of the fourth central shaft 733 is connected to the output shaft of the second gearbox 72. The box body 731 is rotatably connected with a third central shaft 732 and a fifth central shaft 734 at the positions on the left and right sides of the fourth central shaft 733, and a second gear 7331 is provided on the fourth central shaft 733. The three central shafts 732 and the fifth central shaft 734 are respectively provided with a first gear 7321 and a third gear 7341 meshing with the second gear 7331, and the third central shaft 732 and the fifth central shaft 734 are respectively provided with The first tooth plate 7322 and the second tooth plate

7342, the box body 731 is slidably connected with a first pusher 735 and a second pusher 736 at the upper and lower sides of the fourth central shaft 733, and the first pusher 735 and the second pusher 736 are both provided There is a rack portion 7361. The two rack portions 7361 are individually engaged with one of the first tooth plate 7322 or the second tooth plate 7342. Both ends of the first pushing member 735 and the second pushing member 736 A fork 7362 is provided, the fork 7362 is located in the annular groove 321, and the movement of the fork 7362 can drive the wire feed roller 32 to move.

[0026] Preferably, the first tooth plate 7322 and the second tooth plate 7342 have the same structure, and the first tooth plate 7322 and the second tooth plate 7342 are a sector-shaped tooth plate obtained by removing more than half of a complete gear. The orientations of the first tooth plate 7322 and the second tooth plate 7342 differ by 180 degrees. That is, when the first tooth plate 7322 faces directly upward, the second tooth plate 7342 faces directly below, and when the first tooth plate 7322 faces the front left, the second tooth plate 7342 faces the front right, and vice versa. The central angles and orientations of the first tooth plate 7322 and the second tooth plate 7342 need to be precisely calculated and set so that they will not simultaneously engage with the rack portion 7361 on the first pushing member 735, nor will they simultaneously engage with the second tooth plate 7361. The rack portion 7361 on the pushing member 736 engages, and when the first tooth plate 7322 is disengaged from the rack portion 7361 on the first pushing member 735, the second tooth plate 7342 immediately or as soon as possible engages with the rack portion 7361 on the first pushing member 735. The rack portion 7361 meshes. When the first tooth plate 7322 is disengaged from the rack portion 7361 on the second pusher 736, the second rack 7342 meshes with the rack portion 7361 of the second pusher 736 immediately or as soon as possible . In order to achieve the above function, the central angle of the first tooth plate 7322 and the second tooth plate 7342 is preferably 173. -178. between.

[0027] Preferably, the central angle of the first tooth plate 7322 and the second tooth plate 7342 is 175°.

[0028] Preferably, the pressing device 4 is provided with a through hole 41, two sides of the gun body bracket 1 are provided with uprights, the uprights are located in the through holes 41, the top of the upright is provided with a threaded part, the The threaded part is threadedly connected with a compression nut 5, and a spring is arranged between the compression nut 5 and the compression device 4. The wire feeding roller 32 on the pressing device 4 can press the wire on the wire feeding roller 32 on the first central shaft 3, so that when the wire feeding roller 32 on the first central shaft 3 rotates, the wire can be transported To the nozzle 6.

[0029] Preferably, the lower part of the gun body bracket 1 is provided with a mounting seat 11 to facilitate the installation of the arc spray gun on the mechanical arm of the spraying equipment (not belonging to this device).

[0030] Working principle and process: When spraying binary alloy targets, the wires of the two metals are respectively passed through the two front wire guide tubes 13 and inserted into the wire feeding roller 32 and the pressing device 4 on the first central shaft 3 Between the wire feeding rollers 32, and then through the rear guide wire tube 14 to the nozzle 6. According to the composition ratio of the target material, the two first servo motors 2 are respectively set to have appropriate speeds by calculation, so that the two metal wires can obtain appropriate wire feeding speeds respectively, so that the sprayed target material composition meets the requirements. 5 and 7, the second servo motor 71 can drive the fourth central shaft 733 to rotate clockwise, and the fourth central shaft 733 drives the third central shaft 732 and the fifth central shaft 734 to rotate counterclockwise, so that the first gear plate 7322 rotates counterclockwise to push the first pushing member 735 to the left (at this time, the first tooth plate 7322 is separated from the second pushing member 736), thereby driving the wire feeding roller 32 on the second central shaft 42 to move to the left, and the second tooth The plate 7342 rotates counterclockwise to push the second pusher 736 to the right (the second toothed plate 7342 is separated from the first pusher 735 at this time), thereby driving the wire feed roller 32 on the first central shaft 3 to move to the right. , The lower wire feed roller 32 moves in the opposite direction, and also has the fixing function of the front guide wire tube 13 and the rear guide wire tube 14, so the metal wire will not move left and right. This way can make the surface of the wire feed roller 32 larger Contact with the metal wire within the width of the The wear speed is low, and the diameter of the wire feeding roller 32 here is significantly reduced, and the wire feeding speed is slower than the set speed, which is caused by severe wear at a certain place, so that the composition of the target material meets the requirements. When the first tooth plate 7322 and the second tooth plate 7342 rotate 180 counterclockwise. After that, the first tooth plate 7322 disengages from the first pushing member 735, and then engages with the rack portion 7361 on the second pushing member 736, pushing the second pushing member 736 to move to the left; at the same time, the second tooth plate 7342 Disengaged from the second pushing member 736, and then engaged with the rack portion 7361 on the first pushing member 735, pushing the first pushing member 735 to move to the right, and so on

complex. Since the speed of the first pushing member 735 and the second pushing member 736 are constant during the movement during this process, the surface of the wire feed roller 32 wears relatively uniformly, and there is no difference in the depth of the wear scar. In actual use, the rotation speed of the second servo motor 71 can be set to be relatively slow, as long as the surface of the wire feeding roller 32 is uniformly worn.