Spray gun mounting rack, coating equipment and coating method

Abstract

The invention provides a spray gun mounting rack which comprises a mounting plate, a vibration assembly and at least two powder feeding assemblies, and spray holes are formed in the mounting plate in a penetrating mode; at least two groups of powder feeding assemblies are arranged on the mounting plate at intervals around the spraying hole, each powder feeding assembly comprises a powder feeding needle, the outlet end of each powder feeding needle faces the spraying hole, and the powder feeding needles can rotate around the axis parallel to the axial direction of the spraying hole so as to adjust the powder outlet direction of the powder feeding needles. The vibration assembly is used for removing accumulated burls at the muzzle of the spray gun in a vibration mode. By adopting the spray gun mounting frame, before spraying, the powder feeding needles are rotated in the same rotation direction, so that the powder outlet directions of the powder feeding needles are staggered from the centers of the spraying holes, the powder outlet directions of the multiple powder feeding assemblies are staggered, the situation that the powder outlet directions are opposite to one another is avoided, and therefore the situation that powder conflicts and losses are caused is avoided; and the deposition rate of the sprayed target material is effectively improved. The invention further discloses coating equipment and a coating method.

Description

Technical Field

[0001] The invention belongs to the technical field of plasma spraying, and in particular relates to a spray gun mounting rack, coating equipment and a coating method. Background Art

[0002] Plasma spraying technology is mainly used in the fields of protective coating preparation, material repair, target material production, etc. In the field of spraying target materials, the main method is to spray tubular rotating targets. An arc is generated between the cathode and anode of the plasma spray gun to ionize argon gas into plasma. The plasma heats the powder to a molten or semi-molten state, and atomizes it with the help of flame flow to form small molten droplets. The molten droplets collide with the surface of the sandblasting backing tube at high speed with the plasma flow, and then quickly cool and solidify into a coating. As the coating continues to accumulate, a dense target blank is eventually formed.

[0003] The powder feeding line of existing plasma coating equipment is mainly external, that is, the powder feeding line is located outside the spray gun. Compared with the internal powder feeding line, the external one is beneficial to avoid the molten powder adhering to the inner wall of the spray gun muzzle and reduce the probability of muzzle clogging. However, the existing external powder feeding line will have some molten powder loss, resulting in low deposition rate of spray target. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing external powder feeding line will have partial molten powder loss, resulting in a low deposition rate of the spray target material. In order to solve the above technical problem, a spray gun mounting bracket, coating equipment and coating method with a high deposition rate are provided.

[0005] The technical solution proposed by the present invention is: A spray gun mounting bracket, comprising: The mounting plate is penetrated with a spray hole for the muzzle of the spray gun to extend into; At least two groups of powder delivery components are arranged on the mounting plate at intervals around the injection hole, each of the powder delivery components comprises a powder delivery needle, the outlet end of each of the powder delivery needles faces the injection hole, and the powder delivery needle can rotate around an axis parallel to the axial direction of the injection hole to adjust the powder delivery direction of the powder delivery needle; A vibration component is arranged on the same side of the mounting plate as the powder feeding component. The vibration component has a vibration end, which extends to the injection hole and is used for vibrating and removing the nodules at the muzzle of the spray gun.

[0006] Furthermore, each of the powder feeding components also includes a first mounting block and a first slider, the first mounting block is arranged on the mounting plate, the first slider is slidably arranged on the first mounting block to rotate around an axis parallel to the axis of the injection hole, and the powder feeding needle is arranged on the first slider.

[0007] Furthermore, the first mounting block is provided with an arc-shaped groove, and the first sliding block is slidably arranged in the arc-shaped groove.

[0008] Furthermore, each of the powder feeding assemblies further includes a first pressing plate, the first pressing plate is connected to the first mounting block, and the first pressing plate is used to press and fix the first sliding block to the first mounting block.

[0009] Furthermore, the spray gun mounting bracket also includes at least two groups of air blowing assemblies, which are arranged on the mounting plate at intervals around the injection hole, and each of the air blowing assemblies corresponds to a powder feeding assembly. Each of the air blowing assemblies includes an air blowing pipe, and the air blowing pipe can rotate around an axis parallel to the axis of the injection hole so that the outlet end of the air blowing pipe faces the outlet end of the corresponding powder feeding needle.

[0010] Furthermore, each of the blowing components also includes a second mounting block and a second slider, the second mounting block is arranged on the mounting plate, the second slider is slidably arranged on the second mounting block to rotate around an axis parallel to the axis of the injection hole, and the blowing pipe is arranged on the second slider.

[0011] Furthermore, the powder feeding needle can pass through a midpoint position during rotation, and when the powder feeding needle rotates to the midpoint position, the powder feeding needle extends along the radial direction of the injection hole; Taking the midpoint position as a reference, the rotation angle of the powder feeding needle is ± (3~5)°.

[0012] A coating device comprises the spray gun mounting bracket as described above.

[0013] A coating method, comprising the steps of: S110, rotating a plurality of powder feeding needles in the same rotation direction so that the powder discharge direction of each of the powder feeding needles is offset from the center of the injection hole, and the outlet end of the powder feeding needle faces the injection hole; S120, sealingly installing the mounting plate at the opening of the sealing furnace; S130, spraying is performed. During the spraying process, the nodules at the muzzle of the spray gun are removed by vibration of the vibration component.

[0014] Further, in step S110, taking the position of the powder feeding needle when extending along the radial direction of the injection hole as a reference, the rotation angle of the powder feeding needle is ±(3-5)°.

[0015] By using the above-mentioned spray gun mounting bracket, before spraying, the powder feeding needle is rotated in the same rotation direction, so that the powder discharge direction of the powder feeding needle is staggered with the center of the injection hole, thereby achieving staggered powder discharge directions of multiple groups of powder feeding components, avoiding the situation where the powder discharge directions are opposite to each other, thereby avoiding the conflict and loss of powder, and effectively improving the deposition rate of the spray target. At the same time, the nodules at the muzzle of the spray gun are removed by the vibration component, avoiding excessive accumulation of nodules and improving the coating effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0017] Figure 1 A schematic structural diagram of a coating device provided by an embodiment of the present invention; Figure 2 for Figure 1 The schematic diagram of the structure of the spray gun mounting frame in the coating equipment shown; Figure 3 for Figure 2 A schematic structural diagram of the spray gun mounting frame from another angle shown; Figure 4 A schematic structural diagram of a spray gun mounting bracket provided in another embodiment of the present invention.

[0018] Description of labels: 100, spray gun mounting bracket; 200, gun muzzle; 300, sealing furnace; 110, mounting plate; 111, injection hole; 120, powder delivery assembly; 121, powder delivery needle; 122, powder delivery pipe; 123, first mounting block; 124, first slider; 125, first pressure plate; 126, first locking member; 130, vibration assembly; 131, vibration drive member; 132, vibration rod; 140, blowing assembly; 141, blowing pipe; 142, second mounting block; 143, second slider; 144, second pressure plate; 145, second locking member. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] In order to facilitate understanding of the technical solution of the present application, the existing coating equipment is described here: the existing coating equipment with an external powder feeding line usually has two opposite powder feeding lines, and both powder feeding lines feed powder toward the center of the gun muzzle. In this way, the powders fed by the two powder feeding lines will collide, resulting in partial loss of molten powder, thereby causing a low deposition rate.

[0022] On the one hand, if Figure 1 As shown, the present application provides a coating device, which includes a spray gun, a powder supply mechanism, an air supply mechanism and a spray gun mounting frame 100, a spray gun muzzle 200 (see Figure 2 ) is mounted on the spray gun mounting frame 100, and the powder supply mechanism and the gas supply mechanism are both connected to the spray gun mounting frame 100. The powder supply mechanism is used to provide powder to the plasma, and the gas supply mechanism is used to provide gas for blowing the anode. Optionally, the plasma is formed by ionization of an inert gas, the powder can be silicon powder, and the gas for blowing the anode can use the same inert gas as the plasma.

[0023] Furthermore, the coating equipment also includes a sealed furnace 300, which has a vacuum chamber and an opening connected to the vacuum chamber. The parts to be sprayed are arranged in the vacuum chamber, and the spray gun mounting bracket 100 is sealed and connected to the opening of the sealed furnace 300. The spray gun and the powder supply mechanism spray the parts to be sprayed in the vacuum chamber through the spray gun mounting bracket 100.

[0024] See also Figure 2 The spray gun mounting frame 100 includes a mounting plate 110. A spray hole 111 is provided on the mounting plate 110, and the mounting plate 110 is sealed and connected to the opening of the sealed furnace 300. The spray hole 111 is for the muzzle 200 of the spray gun to extend into, so that the spray gun can spray plasma into the sealed furnace 300. Optionally, a sealing ring is provided at the edge of the mounting plate 110 to ensure the sealing of the connection between the mounting plate 110 and the opening. Further, the mounting plate 110 is penetrated with a spray hole 111, and the spray hole 111 is connected to the vacuum chamber. The muzzle 200 of the spray gun is mounted at the spray hole 111, and the end face of the muzzle 200 is flush with the surface of the mounting plate 110 facing the vacuum chamber, so as to spray plasma into the vacuum chamber through the spray hole 111.

[0025] In one embodiment, the spray gun mounting frame 100 further includes at least two sets of powder delivery assemblies 120, which are arranged on the mounting plate 110 at intervals around the injection hole 111 and are located on the side of the mounting plate 110 facing the vacuum chamber. Each powder delivery assembly 120 includes a powder delivery needle 121, the outlet end of the powder delivery needle 121 faces the injection hole 111, and the other end of the powder delivery needle 121 is connected to a powder supply mechanism, which provides powder to the powder delivery needle 121 and delivers powder to the injection hole 111 through the powder delivery needle 121. The powder delivery needle 121 can rotate around an axis parallel to the axial direction of the injection hole 111, that is, Figure 2 The axis of the powder delivery needle 121 is rotated about the vertical paper surface to adjust the powder delivery direction. It can be understood that the powder delivery direction is Figure 2 The length direction of the powder delivery needle 121.

[0026] It should be explained that the outlet end of the powder delivery needle 121 is oriented toward the injection hole 111, that is, during the process of adjusting the powder delivery direction of the powder delivery needle 121, the outlet end of the powder delivery needle 121 is always oriented toward the injection hole 111, so as to ensure that the powder delivery needle 121 delivers powder toward the injection hole 111. In addition, the above-mentioned adjustment of the powder delivery direction of the powder delivery needle 121 means that compared with the existing powder delivery line toward the center of the injection hole 111, the powder delivery direction of the powder delivery needle 121 in this solution can be staggered with the center of the injection hole 111.

[0027] Furthermore, the spray gun mounting frame further includes a vibration assembly 130, which is disposed on the same side of the mounting plate 110 as the powder feeding assembly 120. The vibration assembly 130 has a vibration end, which extends to the injection hole 111 and is used to vibrate and remove the nodules at the muzzle 200 of the spray gun.

[0028] By using the spray gun mounting frame 100, before spraying, the powder delivery needle 121 is first rotated in the same rotation direction, so that the powder delivery direction of the powder delivery needle 121 is staggered with the center of the injection hole 111, thereby achieving staggered powder delivery directions of multiple groups of powder delivery components 120, avoiding the situation where the powder delivery directions are opposite to each other, thereby avoiding the powder from colliding and being lost, and effectively improving the deposition rate of the spray target. At the same time, the nodules at the muzzle 200 of the spray gun are removed by the vibration component 130, avoiding excessive accumulation of nodules and improving the coating effect.

[0029] It should be further explained that the powder delivery needles 121 of each set of powder delivery components 120 can be rotated, so as to ensure that the powder delivery directions of each powder delivery needle 121 are staggered. Figure 2 For example, there are two groups of opposite powder feeding assemblies 120 in the multiple groups of powder feeding assemblies 120. Assuming that the outlet end of the powder feeding needle 121 is initially facing the center of the injection hole 111, it is only necessary to rotate the multiple powder feeding needles 121 in the counterclockwise direction by the same angle to achieve the staggered powder discharge direction of each powder feeding needle 121.

[0030] For the vibration component 130, the existing nodules will accumulate at the muzzle 200. If the nodules are too large and fall off, they will be sprayed with plasma and attached to the target material, resulting in an uneven surface of the target material, thereby affecting the coating quality. The vibration component 130 is set up to remove the nodules at the muzzle 200 through the vibration of the vibration component 130, thereby avoiding excessive nodules from accumulating, thereby improving the coating quality.

[0031] In a preferred embodiment, the powder feeding needle 121 can pass through the midpoint position during its rotation; when the powder feeding needle 121 rotates to the midpoint position, the powder feeding needle 121 extends radially along the injection hole 111, that is, the outlet end of the powder feeding needle 121 is now facing the center of the injection hole 111. Taking the midpoint position as a reference, the rotation angle of the powder feeding needle 121 is ± (3~5) °. In other words, assuming that the powder feeding needle 121 is at the midpoint position, the powder feeding needle 121 can rotate in two rotation directions, and with the midpoint position as the starting point, the maximum rotation angle of the powder feeding needle 121 in the two rotation directions is 3°~5°, for example, 3°~5° for counterclockwise rotation and -3°~-5° for clockwise rotation.

[0032] against Figure 2 It should be explained that since the powder feeding needle 121 has a certain wall thickness, which is shown as the size of the end face of the outlet end, and the outlet of the powder feeding needle 121 is located in the middle of the outlet end, the outlet of the powder feeding needle 121 is still facing the injection hole 111 at this time to ensure that the powder feeding needle 121 feeds powder toward the injection hole 111.

[0033] Preferably, the powder delivery assembly 120 further includes a powder delivery tube 122, one end of which is rotatably connected to the mounting plate 110 around an axis parallel to the axial direction of the injection hole 111, and the other end is connected to the powder delivery needle 121 to realize the rotation setting of the powder delivery needle 121. At the same time, it can be determined that the end of the powder delivery tube 122 connected to the mounting plate 110 is sealed and penetrated through the mounting plate 110 to be connected to the powder supply mechanism.

[0034] In combination with the above embodiments, it can be seen that Figure 2 In the illustrated embodiment, the rotation center of the powder delivery needle 121 is the end where the powder delivery tube 122 is connected to the mounting plate 110, so as to facilitate the installation of the powder delivery tube 122. In other embodiments, the rotation center may also be located at other positions, such as at the outlet end of the powder delivery needle 121. In this case, the end where the powder delivery needle 121 is connected to the powder delivery tube 122 will swing, so the powder delivery tube may be a hose.

[0035] Please also see Figure 3In one embodiment, each powder delivery assembly 120 further includes a first mounting block 123 and a first slider 124. The first mounting block 123 is disposed on the mounting plate 110. The first slider 124 is slidably disposed on the first mounting block 123 to rotate around an axis parallel to the axial direction of the injection hole 111. The powder delivery needle 121 is disposed on the first slider 124 to rotate with the first slider 124. Optionally, the first mounting block 123 is provided with an arc groove, and the first slider 124 is slidably disposed in the arc groove, so as to realize rotation around the above-mentioned axis during the sliding process.

[0036] In one embodiment, each powder feeding assembly 120 further includes a first pressing plate 125, which is connected to the first mounting block 123 and is used to press and fix the first slider 124 to the first mounting block 123, so that the first slider 124 is fixed relative to the first mounting block 123. In this way, the position of the powder feeding needle 121 can be fixed by the first pressing plate 125 after the angle of the powder feeding needle 121 is adjusted.

[0037] Furthermore, each powder feeding assembly 120 further includes a first locking member 126, one end of which passes through the first pressing plate 125 and is detachably connected to the first mounting block 123, and the first locking member 126 can lock and release the first pressing plate 125. When the first locking member 126 locks the first pressing plate 125, the first pressing plate 125 presses and fixes the first slider 124 to the first mounting block 123; when the first locking member 126 releases the first pressing plate 125, the first pressing plate 125 can move relative to the first mounting block 123, so that the first slider 124 can slide on the first mounting block 123.

[0038] Specific to Figure 3 In the illustrated embodiment, the shape of the first pressing plate 125 is the same as that of the first mounting block 123, and first locking members 126 are provided at both ends of the first pressing plate 125 to improve the strength of the connection. Preferably, the first locking member 126 is a bolt, and by loosening the bolt, the first pressing plate 125 can move relative to the first mounting block 123, thereby allowing the first slider 124 to slide; by tightening the bolt, the first pressing plate 125 can press the first slider 124, thereby fixing the first slider 124.

[0039] In one embodiment, the vibration assembly 130 includes a vibration driving member 131 and a vibration rod 132. The vibration driving member 131 is disposed on the mounting plate 110 and is located on the same side as the powder feeding assembly 120. The vibration driving member 131 is connected to one end of the vibration rod 132. The end of the vibration rod 132 away from the vibration driving member 131 extends to the injection hole 111 to vibrate and remove the nodules at the muzzle 200. It can be seen that the end of the vibration rod 132 away from the vibration driving member 131 is the above-mentioned vibration end. Specifically, the vibration driving member 131 is an electromagnetic vibrator.

[0040] Combination Figure 1 It should be noted that during the vibration of the vibration rod 132, the vibration end thereof will not extend into the plasma ejection range to avoid affecting the plasma ejection. In addition, a small amount of nodules will accumulate at the muzzle 200, and during the accumulation process, the nodules gradually extend toward the periphery of the muzzle 200, so that the vibration end contacts the nodules, and the accumulated nodules are removed by vibration.

[0041] In a preferred embodiment, the spray gun mounting frame 100 includes a plurality of sets of vibration components 130, which are arranged on the mounting plate 110 at intervals around the spray hole 111 to improve the removal effect. At the same time, the vibration end is shovel-shaped to improve the removal efficiency.

[0042] In one embodiment, the spray gun mounting frame 100 further includes at least two groups of air blowing assemblies 140, which are arranged on the mounting plate 110 at intervals around the injection hole 111, and each air blowing assembly 140 corresponds to a powder feeding assembly 120. The air supply mechanism is connected to the air blowing assembly 140 to blow air toward the outlet end of the powder feeding needle 121 through the air blowing assembly 140, thereby blowing away the nodules at the outlet end of the powder feeding needle 121 during the spraying process to prevent the nodules from clogging the injection port.

[0043] Specific to Figure 2 In the embodiment shown, the number of powder delivery components 120 and air blowing components 140 are both four groups, and the four groups of powder delivery components 120 are evenly spaced along the circumference of the injection hole 111, and the corresponding four groups of air blowing components 140 are evenly spaced along the circumference of the injection hole 111, and each air blowing component 140 is used to blow air toward the outlet end of a corresponding powder delivery needle 121. At the same time, it should be explained again that the four groups of powder delivery components 120 are arranged in pairs, so that Figure 2 Take two sets of powder feeding components 120 facing each other in the left and right directions as an example: If the powder feeding needles 121 in the two opposite powder feeding assemblies 120 are both extended in the left-right direction, that is, the powder feeding needle 121 on the left sprays powder to the right, and the powder feeding needle 121 on the right sprays powder to the left, the powders sprayed by the two powder feeding needles 121 will collide in the middle of the injection hole 111, resulting in partial loss of molten powder; if the powder feeding needle 121 rotates 3-5 degrees counterclockwise to achieve Figure 2 As shown in the effect, the powder delivery needle 121 on the left sprays powder toward the lower right, and the powder delivery needle 121 on the right sprays powder toward the upper left, and both are deviated from the injection hole 111, that is, the sprayed powder can enter the plasma sprayed from the injection hole 111, and the powders sprayed by the two can be completely staggered, thereby avoiding powder loss. Similarly, when the powder delivery needles 121 in the four groups of powder delivery components 120 all rotate counterclockwise, it can also ensure that the powders sprayed by the four powder delivery needles 121 are completely staggered.

[0044] In one embodiment, each air blowing assembly 140 includes an air blowing pipe 141, which is connected to an air supply mechanism. The air blowing pipe 141 can rotate around an axis parallel to the axis of the injection hole 111, so that the outlet end of the air blowing pipe 141 faces the outlet end of the corresponding powder feeding needle 121, so that air is blown toward the outlet end of the powder feeding needle 121 through the air blowing pipe 141 to blow away the accumulation at the outlet end of the powder feeding needle 121. It can be understood that since the powder feeding needle 121 in the above embodiment can rotate, in order to ensure that the outlet end of the air blowing pipe 141 can accurately face the outlet end of the powder feeding needle 121, the air blowing pipe 141 can also be rotatably arranged. Specifically, Figure 2 In the illustrated embodiment, the powder feeding needle 121 and the air blowing tube 141 both rotate counterclockwise.

[0045] In a preferred embodiment, the outlet end of the air blowing tube 141 is flat, that is, the outlet of the air blowing tube 141 is a flat port, so as to increase the blowing force and ensure that the accumulation at the outlet end of the powder delivery needle 121 is blown away. Of course, in other embodiments, outlets of other shapes that can increase the blowing force can also be used, which is not limited here.

[0046] In one embodiment, each blowing assembly 140 further includes a second mounting block 142 and a second slider 143, wherein the second mounting block 142 is disposed on the mounting plate 110, the second slider 143 is disposed around the second mounting block 142 to rotate around an axis parallel to the axial direction of the injection hole 111, and the blowing pipe 141 is disposed on the second slider 143. Further, each blowing assembly 140 further includes a second pressing plate 144 and a second locking member 145, wherein the second pressing plate 144 can press and fix the second slider 143 to the second mounting block 142, and the second locking member 145 can lock and fix the second pressing plate 144 to the second mounting block 142.

[0047] It should be noted that the structures and connection methods of the second mounting block 142, the second slider 143, the second pressure plate 144 and the second locking member 145 are the same as those of the first mounting block 123, the first slider 124, the first pressure plate 125 and the first locking member 126, and are not elaborated here.

[0048] In order to facilitate understanding of the technical solution of the coating equipment provided by the present application, Figure 1 and Figure 2 The process flow of the coating equipment in the above embodiment is described as follows: First, rotate the powder feeding needle 121 as required, and the rotation direction and angle of multiple powder feeding needles 121 are the same; then rotate the air blow pipe 141 according to the position of the outlet end of the powder feeding needle 121 to ensure that the outlet end of the air blow pipe 141 faces the outlet end of the powder feeding needle 121. After the position is adjusted, tighten the locking piece to fix the position of the powder feeding needle 121 and the air blow pipe 141. Next, install the mounting plate 110 at the opening of the sealing furnace 300, and start spraying when the environment in the vacuum chamber allows. During the spraying process, the vibration component 130 is used to vibrate and remove the nodules at the muzzle 200 of the spray gun. At the same time, the nodules at the outlet end of the powder feeding needle 121 can be blown away through the air blow pipe 141, and the gas blown out of the air blow pipe 141 is an inert gas, which will not affect the spraying in the vacuum chamber.

[0049] On the other hand, the present application also provides a coating method, which comprises the steps of: S110 , rotating the plurality of powder feeding needles 121 in the same rotation direction, so that the powder discharge direction of each powder feeding needle 121 is offset from the center of the injection hole 111 , and the outlet end of the powder feeding needle 121 faces the injection hole 111 .

[0050] It needs to be explained that Figure 2 In the embodiment shown, the rotation direction is counterclockwise or clockwise. In addition, after adjusting the position of the powder delivery needle 121 , the air blowing tube 141 is rotated so that the outlet end of each air blowing tube 141 faces the outlet end of the corresponding powder delivery needle 121 .

[0051] S120, installing the mounting plate 110 at the opening of the sealing furnace 300, and ensuring that the powder feeding needle 121 and the air blowing pipe 141 are located on the side of the mounting plate 110 facing the vacuum chamber.

[0052] S130, spraying is performed. During the spraying process, the vibration component 130 is used to vibrate and remove the nodules at the muzzle 200 of the spray gun.

[0053] Specifically, when the environment in the vacuum chamber allows, plasma is sprayed into the vacuum chamber by the spray gun, and powder delivery needle 121 sprays powder toward the plasma. During the spraying process, the agglomeration at the gun muzzle 200 can be removed by the vibration component 130, and the agglomeration at the outlet end of the powder delivery needle 121 can be blown away by the air blow pipe 141.

[0054] It should be noted that the specific steps of the coating method can refer to the description of the coating equipment in the above embodiment, which will not be described in detail here.

[0055] In summary, in order to prove that the coating equipment and coating method provided by this solution can improve the deposition rate, the following application examples and comparative examples are provided for illustration: Before the description, the object of action and related parameters are explained: the part to be sprayed is a back tube, the back tube length is 3855mm, and the spraying thickness is 12mm. The powder supply mechanism is used to provide silicon powder with a particle size of 30~160μm; the power of the spray gun is 36.7kw, the current is 520A, the argon flow rate is 24000nl / h, the hydrogen flow rate is 700nl / h, the distance between the gun muzzle 200 and the back tube is 300mm, the moving speed of the back tube is 80mm / min, and the rotation speed of the back tube is 180r / min.

[0056] Application Example 1 like Figure 4 As shown, two sets of powder delivery components 120 and two sets of air blowing components 140 are set, each powder delivery needle 121 is rotated counterclockwise, and the rotation angle α of the powder delivery needle 121 relative to the center position is 3°, and the angle of the air blowing pipe 141 is correspondingly adjusted. Then the mounting plate 110 is installed at the opening of the sealing furnace 300, and the spraying operation is performed. After the spraying is completed, the target deposition rate is 53%, and the production time is 7.4h.

[0057] Application Example 2 like Figure 4 As shown, two sets of powder delivery components 120 and two sets of air blowing components 140 are set, each powder delivery needle 121 is rotated counterclockwise, and the rotation angle α of the powder delivery needle 121 relative to the center position is 5°, and the angle of the air blowing pipe 141 is adjusted accordingly. Then the mounting plate 110 is installed at the opening of the sealing furnace 300, and the spraying operation is performed. After the spraying is completed, the target deposition rate is 58%, and the production time is 7h.

[0058] Comparative Example Two sets of powder delivery components 120 and two sets of air blowing components 140 are set to ensure that each powder delivery needle 121 is oriented toward the center of the injection hole 111, that is, each powder delivery needle 121 extends radially along the injection hole 111, and ensure that the outlet end of the air blowing pipe 141 is oriented toward the outlet end of the powder delivery needle 121. Then, the mounting plate 110 is installed at the opening of the sealing furnace 300 for spraying. After the spraying is completed, the target deposition rate is 45% and the production time is 8 hours.

[0059] It should be explained that, for ease of understanding, both Application Example 1 and Application Example 2 use Figure 4 It should be noted that the rotation directions and rotation angles in Application Example 1 and Application Example 2 are not limited to being the same.

[0060] In summary, compared with the comparative example, the deposition rate of Application Example 1 increased by 17.8%, and the production time was shortened by 7.5%; compared with the comparative example, the deposition rate of Application Example 2 increased by 28.9%, and the production time was shortened by 7.5%. It can be seen that the coating equipment and coating method provided in this application can effectively improve the target material deposition rate.

[0061] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spray gun mounting bracket, characterized in that: include: The mounting plate is penetrated with a spray hole for the muzzle of the spray gun to extend into; At least two groups of powder delivery components are arranged on the mounting plate at intervals around the injection hole, each of the powder delivery components comprises a powder delivery needle, the outlet end of each of the powder delivery needles faces the injection hole, and the powder delivery needle can rotate around an axis parallel to the axial direction of the injection hole to adjust the powder delivery direction of the powder delivery needle; A vibration component is arranged on the same side of the mounting plate as the powder feeding component. The vibration component has a vibration end, which extends to the injection hole and is used for vibrating and removing the nodules at the muzzle of the spray gun.

2. The spray gun mounting bracket according to claim 1, characterized in that: Each of the powder feeding components also includes a first mounting block and a first slider, wherein the first mounting block is arranged on the mounting plate, the first slider is slidably arranged on the first mounting block to rotate around an axis parallel to the axial direction of the injection hole, and the powder feeding needle is arranged on the first slider.

3. The spray gun mounting bracket according to claim 2, characterized in that: The first mounting block is provided with an arc groove, and the first sliding block is slidably arranged in the arc groove.

4. The spray gun mounting bracket according to claim 2, characterized in that: Each of the powder feeding assemblies further includes a first pressing plate, which is connected to the first mounting block and is used to press and fix the first sliding block to the first mounting block.

5. The spray gun mounting bracket according to claim 1, characterized in that: The spray gun mounting bracket also includes at least two groups of air blowing assemblies, which are arranged on the mounting plate at intervals around the injection hole, and each of the air blowing assemblies corresponds to a powder feeding assembly. Each of the air blowing assemblies includes an air blowing pipe, and the air blowing pipe can rotate around an axis parallel to the axis of the injection hole so that the outlet end of the air blowing pipe faces the outlet end of the corresponding powder feeding needle.

6. The spray gun mounting bracket according to claim 5, characterized in that: Each of the blowing components further comprises a second mounting block and a second slider, wherein the second mounting block is arranged on the mounting plate, the second slider is slidably arranged on the second mounting block to rotate around an axis parallel to the axial direction of the injection hole, and the blowing pipe is arranged on the second slider.

7. The spray gun mounting bracket according to claim 1, characterized in that: The powder feeding needle can pass through the midpoint position during the rotation process, and when the powder feeding needle rotates to the midpoint position, the powder feeding needle extends along the radial direction of the injection hole; Taking the midpoint position as a reference, the rotation angle of the powder feeding needle is ± (3~5)°.

8. A coating device, characterized in that: The invention comprises a spray gun mounting bracket as described in any one of claims 1 to 7.

9. A coating method, characterized in that: Includes steps: S110, rotating a plurality of powder feeding needles in the same rotation direction so that the powder discharge direction of each of the powder feeding needles is offset from the center of the injection hole, and the outlet end of the powder feeding needle faces the injection hole; S120, sealingly installing the mounting plate at the opening of the sealing furnace; S130, spraying is performed. During the spraying process, the nodules at the muzzle of the spray gun are removed by vibration of the vibration component.

10. The coating method according to claim 9, characterized in that: In step S110, the rotation angle of the powder feeding needle is ±(3-5)°, with the position of the powder feeding needle extending along the radial direction of the injection hole as a reference.

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