Rotatable thermal spraying gun

Abstract

The invention discloses a rotatable thermal spraying gun, and relates to the field of thermal spraying, the rotatable thermal spraying gun comprises a frame body, the inner wall of the lower end of the frame body is provided with a shaft core, the upper end of the frame body is provided with a rotating part, the upper end of the rotating part is provided with a rotating flange, and the upper end of the rotating flange is provided with a connecting adapter; a base is installed at the upper end of the connecting adapter, an extension rod is fixedly arranged in the base in a sleeved mode, an offset block is connected to the upper end of the extension rod, and a spray gun is connected to the rear portion of the upper end of the offset block. By arranging the rotating component, the spray gun can be driven to rotate, the situation that a rotating machine rotating shaft is damaged due to huge eccentric torque caused by eccentric rotation of a part is avoided, the situation that internal stress change or tiny deformation of the part is possibly caused by part rotation is avoided, and the machining precision is guaranteed; and through joint cooperation of the rotating component and the offset block, the convex surface of the part can be sprayed, and the use scene and the process applicability of the equipment are expanded.

Description

Technical Field

[0001] The invention relates to the field of thermal spraying, in particular to a rotatable thermal spraying gun. Background Art

[0002] Thermal spraying technology is a method of using a heat source to heat the spray material to a molten or semi-molten state, and spraying and depositing it onto the pre-treated substrate surface at a certain speed to form a coating. Thermal spraying technology creates a special working surface on the surface of ordinary materials to achieve a series of functions such as corrosion resistance, wear resistance, friction reduction, high temperature resistance, oxidation resistance, heat insulation, insulation, conductivity, and microwave radiation protection, so as to save materials and energy. The special working surface is called a coating, and the working method of making the coating is called thermal spraying.

[0003] There are several disadvantages in the existing thermal spray guns: 1. The existing thermal spray guns traditionally use rotary tooling to process inner hole parts. The workpiece is installed on the turning bed through the tooling. The workpiece rotates together with the tooling under the drive of the turning bed, and cooperates with the translational movement of the thermal spray gun to realize the spiral spraying of the inner hole of the part. After multiple round trips, the coating is superimposed to form a cylindrical coating that evenly covers the entire inner hole surface. However, for large or complex-shaped parts, especially those whose center is not on the central axis of rotation of the part, the eccentric rotation of the part will bring huge eccentric torque to the turning bed shaft, which will cause the turning bed to to damage; 2. The existing thermal spray gun sprays the inner wall of the inner hole part to prepare a coating on the inner wall. When spraying the rotating outer wall part, the manufacturer usually rotates the part and uses the thermal spray gun to spray its outer surface while translating it to form a spiral spray rule on the outer surface of the part. After all the rules overlap, a cylindrical package is formed. After multiple wrappings, a thicker coating is formed. When spraying small protrusions on large parts, it is difficult to rotate the large part around the center line of the small protrusion and then let the spray gun spray it. Further improvement is needed. For this purpose, a rotatable thermal spray gun is proposed. Summary of the invention

[0004] The main purpose of the present invention is to provide a rotatable thermal spray gun, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is: A rotatable thermal spray gun comprises a frame, an inner wall of the lower end of the frame is provided with an axis core, a rotating component is provided at the upper end of the frame, a rotating flange is provided at the upper end of the rotating component, a connecting adapter is provided at the upper end of the rotating flange, a base is provided at the upper end of the connecting adapter, an extension rod is provided at the internal fixing sleeve of the base, an offset block is connected to the upper end of the extension rod, and a spray gun is connected to the rear of the upper end of the offset block.

[0006] Preferably, the rotating component includes a box body, the box body is installed at the upper end of the frame body, a motor is installed at the lower end of the box body, the output end of the motor extends into the box body and is fixedly connected to a first gear, the first gear is meshingly connected to a second gear, the internal fixed sleeve of the second gear is provided with a connecting shaft, the upper end of the connecting shaft is movably inserted into the upper end of the box body, and the lower end of the connecting shaft is movably inserted into the shaft core.

[0007] Preferably, the rotating flange is arranged at the upper end of the box body, and the rotating flange is movably sleeved on the upper outer surface of the connecting shaft.

[0008] Preferably, a balancing block is installed at the front upper end of the offset block.

[0009] Preferably, the offset block is a Y-shaped structure, a circular groove is provided at the lower end of the offset block, a plurality of through holes are provided in the middle of the lower wall of the circular groove, the through holes extend to the upper end of the offset block, and a plurality of fixing holes are provided on the offset block.

[0010] Preferably, a water pipe and an air pipe are fixedly inserted and connected to the outer surface of the shaft core, and the lower end of the shaft core is movably inserted to the lower side of the frame.

[0011] Compared with the prior art, the present invention has the following beneficial effects: By setting a rotating component to drive the spray gun to rotate, when spraying a part whose center is not on the rotating center axis of the part, the spray gun is disassembled and installed above the extension rod, and the control motor drives the first gear to rotate, and the first gear drives the second gear to rotate. The second gear drives the rotating flange and the extension rod to rotate through the connecting shaft, thereby driving the spray gun to rotate, and the inner wall of the part can be sprayed without driving the part to rotate, avoiding the eccentric rotation of the part causing huge eccentric torque to damage the rotating shaft of the rotary bed, avoiding the rotating part causing internal stress changes or slight deformation, and ensuring the processing accuracy; The rotating component and the offset block work together to spray on the special-shaped surface of the part. When in use, install the spray gun above the offset block, align the center position of the offset block with the raised part on the surface of the part. When the rotating component drives the offset block to rotate, the paint can rotate around the raised part and spray. It can cover the surface of complex shapes more comprehensively and will not cause dead corners in spraying due to the protrusions. This makes the equipment widely used in the spraying of various complex parts, expanding the use scenarios and process applicability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic diagram of the entire structure of the rotatable thermal spray gun in this embodiment; Figure 2is another perspective structural schematic diagram of this embodiment; Figure 3 Schematic diagram of the structure of the rotating component in this embodiment; Figure 4 is a schematic diagram of the structure of the bias block in this embodiment; Figure 5 is a schematic cross-sectional structural diagram of the bias block in this embodiment; Figure 6 Schematic diagram of the structure of the connecting pipe in this embodiment.

[0013] In the figure: 1. frame; 2. shaft core; 3. rotating part; 4. connecting block; 5. rotating flange; 6. connecting adapter; 7. base; 8. extension rod; 9. offset block; 10. spray gun; 11. balance block; 21. water pipe; 22. air pipe; 31. box; 32. motor; 33. first gear; 34. second gear; 35. connecting shaft; 91. circular groove; 92. through hole; 93. fixing hole; 13. connecting pipe; 14. groove. DETAILED DESCRIPTION

[0014] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0015] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0016] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0017] like Figure 1-Figure 6As shown, a rotatable thermal spray gun comprises a frame 1, an axis core 2 is installed on the inner wall of the lower end of the frame 1, a rotating component 3 is installed on the upper end of the frame 1, a rotating flange 5 is arranged on the upper end of the rotating component 3, a connecting adapter 6 is installed on the upper end of the rotating flange 5, a base 7 is installed on the upper end of the connecting adapter 6, an extension rod 8 is provided on the internal fixed sleeve of the base 7, the main material of the extension rod 8 is made of carbon fiber, an offset block 9 is detachably connected to the upper end of the extension rod 8, a spray gun 10 is detachably connected to the rear part of the upper end of the offset block 9, and a connecting block 4 is installed on the right end of the frame 1, and the connecting block 4 is used to facilitate the connection between the device and the robot arm.

[0018] The rotating component 3 is used to drive the spray gun 10 to rotate. Specifically, the rotating component 3 includes a box body 31, which is installed at the upper end of the frame body 1. A motor 32 is installed at the lower end of the box body 31. The output end of the motor 32 extends into the box body 31 and is fixedly connected to a first gear 33. The first gear 33 is meshed and connected to a second gear 34. A connecting shaft 35 is fixedly sleeved inside the second gear 34. The upper end of the connecting shaft 35 is movably inserted into the upper end of the box body 31, and the lower end of the connecting shaft 35 is movably inserted into the shaft core 2. A rotating flange 5 is arranged at the upper end of the box body 31. The rotating flange 5 is movably sleeved on the upper outer surface of the connecting shaft 35, and the center is not on the rotation center axis of the part. When spraying a part, the spray gun 10 is disassembled and installed above the extension rod 8, and the paint gun 10 is placed on the inner wall of the part. The motor is controlled to drive the first gear 33 to rotate, and the first gear 33 drives the second gear 34 to rotate. The second gear 34 drives the rotating flange 5 and the connecting adapter 6 to rotate through the connecting shaft 35. The connecting adapter 6 drives the extension rod 8 to rotate, thereby driving the spray gun 10 to rotate, and the inner wall of the part can be sprayed without driving the part to rotate, thereby avoiding the eccentric rotation of the part causing huge eccentric torque to damage the rotary shaft of the rotary table, avoiding the rotating part causing internal stress changes or slight deformation of the part, and ensuring the processing accuracy.

[0019] On the basis of the above scheme, the convex surface of the part can be sprayed by cooperating with the rotating component 3 and the offset block 9. The offset block 9 is a Y-shaped structure. A circular groove 91 is provided at the lower end of the offset block 9. A plurality of through holes 92 are provided in the middle of the lower wall of the circular groove 91. The through holes 92 are used to facilitate the transportation of spraying raw materials. The through holes 92 extend to the upper end of the offset block 9. A plurality of fixing holes 93 are provided on the offset block 9. When in use, the spray gun 10 is installed above the offset block 9, and the center position of the offset block 9 is aligned with the convex part of the part surface. When the rotating component 3 drives the offset block 9 to rotate, the spray gun 10 can rotate and spray around the convex part, which can be more comprehensive. It can cover the surface of complex shapes without causing dead angles in spraying due to protrusions or depressions, so that the equipment can be widely used in the spraying of various complex parts, expanding the use scenarios and process applicability of the equipment. The forked end of the spray gun 10 and the offset block 9 is directly sealed by a sealing ring. In order to ensure smooth gas flow, especially smooth powder flow, the angle of the through hole 92 at the corner is greater than ninety degrees. This design avoids the generation of eddy currents in the fluid at sharp corners or the formation of powder blockage at this place. The offset block 9 transports the raw material in the through hole 92 to the spray gun 10 through the connecting pipe 13. The outer surface of the connecting pipe 13 is provided with a groove 14, and the groove 14 is used to set the sealing ring.

[0020] In order to ensure the stability of the rotation process and the safety of the spraying process, a balancing block 11 is installed at the front of the upper end of the offset block 9. The balancing block has the same weight as the spray gun, so that the spray gun can maintain balance during the rotation process.

[0021] The outer surface of the shaft core 2 is fixedly interspersed with a water pipe 21 and an air pipe 22, and the lower end of the shaft core 2 is movably interspersed to the lower side of the frame 1. The interior of the shaft core 2 is a laminated structure, and different media (gas, liquid and powder) from the outside can enter annular layers of different depths, and then are transported to the offset block 9 and the spray gun 10 through the rotating joint, the delivery pipe and the extension rod 8. Even in the rotating state, each conduit can maintain good sealing performance to prevent cross-flow and overflow between the gases.

[0022] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A rotatable thermal spray gun, comprising a frame (1), characterized in that: An axis core (2) is mounted on the inner wall of the lower end of the frame (1); a rotating component (3) is mounted on the upper end of the frame (1); a rotating flange (5) is arranged on the upper end of the rotating component (3); a connecting adapter (6) is mounted on the upper end of the rotating flange (5); a base (7) is mounted on the upper end of the connecting adapter (6); an extension rod (8) is arranged on the internal fixed sleeve of the base (7); an offset block (9) is connected to the upper end of the extension rod (8); and a spray gun (10) is connected to the rear of the upper end of the offset block (9).

2. The rotatable thermal spray gun according to claim 1, characterized in that: The rotating component (3) comprises a box (31), the box (31) being mounted on the upper end of the frame (1), a motor (32) being mounted on the lower end of the box (31), an output end of the motor (32) extending into the box (31) and fixedly connected to a first gear (33), the first gear (33) being meshingly connected to a second gear (34), a connecting shaft (35) being fixedly sleeved inside the second gear (34), the upper end of the connecting shaft (35) being movably inserted into the upper end of the box (31), and the lower end of the connecting shaft (35) being movably inserted into the shaft core (2).

3. The rotatable thermal spray gun according to claim 2, characterized in that: The rotating flange (5) is arranged at the upper end of the box body (31), and the rotating flange (5) is movably sleeved on the upper part of the outer surface of the connecting shaft (35).

4. The rotatable thermal spray gun according to claim 1, characterized in that: A balancing block (11) is installed at the front portion of the upper end of the offset block (9).

5. The rotatable thermal spray gun according to claim 1, characterized in that: The offset block (9) is a Y-shaped structure. A circular groove (91) is provided at the lower end of the offset block (9). A plurality of through holes (92) are provided in the middle of the lower wall of the circular groove (91). The through holes (92) extend to the upper end of the offset block (9). A plurality of fixing holes (93) are provided on the offset block (9).

6. The rotatable thermal spray gun according to claim 1, characterized in that: The outer surface of the shaft core (2) is fixedly connected with a water pipe (21) and an air pipe (22), and the lower end of the shaft core (2) is movably inserted into the lower side of the frame (1).

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