Epoxy powder spraying robot and construction method thereof

Abstract

The invention discloses an epoxy powder spraying robot and a construction method thereof, and belongs to the technical field of spraying equipment.The epoxy powder spraying robot comprises a lifting supporting platform and a base fixedly installed on the lifting supporting platform, and the lifting supporting platform can move on the inner side of a workpiece to be sprayed in the longitudinal direction of the workpiece to be sprayed; a rotation driving device is installed on the inner side of the base, the output end of the rotation driving device is connected to one end of a material throwing outer rod through a speed change assembly, the rotation driving device drives the material throwing outer rod to rotate in a plane, a material throwing inner rod is installed at the other end of the material throwing outer rod in a sliding mode, and the outer end of the material throwing inner rod extends outwards in the axial direction of the material throwing outer rod; a material throwing barrel is connected to the outer end of the material throwing inner rod, a powder sprayer is installed on the inner side of the material throwing barrel, a plurality of through holes are formed in the outer wall of the material throwing barrel and face the side away from the material throwing inner rod, and a roller is installed on the outer side of the material throwing barrel and makes contact with the inner arc side wall of a workpiece to be sprayed. According to the invention, the efficiency and the quality stability of spraying operation can be improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of spraying equipment, and particularly relates to an epoxy powder spraying robot and a construction method thereof. BACKGROUND

[0002] In the current industrial coating field, spraying robots have become one of the core equipment of automated production due to their high efficiency, high precision and repeatability. In the prior art, robots are widely used in the spraying of complex curved workpieces due to their flexible motion characteristics of multiple degrees of freedom. It should be pointed out that when facing the inner wall of a workpiece with a large inner arc, the structural limitations of the existing spraying robot will cause significant technical defects. Due to the limitations of the robot arm length and joint rotation angle, the spraying cannot always maintain the optimal distance, which will cause the electrostatic adsorption efficiency to decrease during epoxy powder spraying, resulting in uneven coating coverage and other problems. SUMMARY

[0003] Therefore, the purpose of the present application is to provide an epoxy powder spraying robot and a construction method thereof, which can improve the efficiency and quality stability of the spraying operation.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0005] The epoxy powder spraying robot disclosed by the present application comprises a lifting support platform, a base fixedly installed on the lifting support platform, the lifting support platform being capable of displacing along the longitudinal direction of a workpiece to be sprayed on the inner side of the workpiece to be sprayed, a rotating drive device being installed on the inner side of the base, an output end of the rotating drive device being connected to one end of a material throwing outer rod through a speed change assembly, the rotating drive device driving the material throwing outer rod to rotate in a plane, the other end of the material throwing outer rod being slidingly installed with a material throwing inner rod, the outer end of the material throwing inner rod extending outward along the axial direction of the material throwing outer rod; the outer end of the material throwing inner rod being connected with a material throwing cylinder, the inner side of the material throwing cylinder being installed with a powder sprayer, a plurality of through holes being formed on the outer wall of the material throwing cylinder, the through holes being directed to the side away from the material throwing inner rod, the outer side of the material throwing cylinder being installed with a roller, the roller being in contact with the inner arc side wall of the workpiece to be sprayed.

[0006] Further, the inner side of the material throwing cylinder is installed with a sliding groove, the sliding groove being fixed on the inner side of the material throwing cylinder, the sliding groove extending along the inner wall of the material throwing cylinder, the nozzle of the powder sprayer being directed to the side where the through holes are located, a plurality of groups of supporting legs being uniformly and spacedly installed on the outer side of the powder sprayer, the outer end of the supporting leg being connected with a moving wheel, the moving wheel being slidingly installed in the sliding groove, the inner side end of the material throwing cylinder being installed with a first telescopic device, the output end of the first telescopic device being connected to the powder sprayer and capable of driving the powder sprayer to move along the sliding groove.

[0007] Further, the support leg comprises a first connecting rod support, an L-shaped connecting rod, a straight connecting rod, a second connecting rod support, a mounting seat, a moving wheel support, a pushing disc and a second telescopic device, the first connecting rod support is fixed at one end of the powder sprayer, the first connecting rod support is hingedly connected to one end of the straight connecting rod and the L-shaped connecting rod, the second connecting rod support is hingedly connected to the other end of the L-shaped connecting rod and the straight connecting rod, the short rod of the L-shaped connecting rod is hingedly connected to the pushing disc, the pushing disc is connected to the output end of the second telescopic device, the second telescopic device is installed on the inner side of the material throwing cylinder, the long rod of the L-shaped connecting rod is parallel to the straight connecting rod, the mounting seat is fixed on the second connecting rod support, the moving wheel support is fixed on the second connecting rod support, and moving wheels are rotatably installed at both ends of the moving wheel support, and moving wheels in the same group are arranged along the length direction of the sliding groove.

[0008] Further, the outer side of the material throwing cylinder is fixed with two material blocking plates, the two material blocking plates are located on the two sides of the through hole, and the two material blocking plates and the two rollers form a material blocking space for the powder.

[0009] Further, the speed changing assembly comprises a first rotating shaft, a first gear, a second rotating shaft and a second gear, the output end of the rotating driving device is connected to the first gear through the first rotating shaft, the first gear is engaged with the second gear, the second gear is installed on the outer side of the second rotating shaft, and the second rotating shaft is rotatably matched with the base.

[0010] Further, the second rotating shaft is a hollow rotating shaft and is communicated with the negative pressure pump through a rotating joint, the inner sides of the material throwing outer rod and the material throwing inner rod are hollow, and the material throwing outer rod is communicated with the material throwing cylinder through the material throwing inner rod.

[0011] Further, the outer side of the material throwing outer rod is fixed with a plurality of supporting rods, the supporting rods are uniformly and interval arranged on the outer side of the material throwing outer rod, and the supporting rods are connected to the material throwing inner rod through elastic pull ropes; the outer side of the material throwing outer rod is fixed with a supporting seat, a motor is installed on the supporting seat, a third gear is connected to the output end of the motor, the third gear is engaged with a rack formed on the surface of the material throwing inner rod, and an end portion of the material throwing outer rod is provided with a rubber head capable of sealingly cooperating with the rack.

[0012] Further, the bottom of the lifting support platform is fixed with a guide rail, the guide rail is slidingly installed in a guide rail groove, the end portion of the guide rail groove is provided with a limiting seat, and a damper is installed between the limiting seat and the lifting support platform.

[0013] The construction method of the epoxy powder spraying robot, the spraying robot adopts the spraying robot described in any one of the above, and during work, first, the lifting support platform is pushed to the specified spraying position through the push plate, the height of the lifting support platform is adjusted, the output shaft of the rotating drive device is located at the center of the section of the workpiece to be sprayed, then the height position of the lifting support platform is fixed, after the fixing is completed, the rotating drive device is started to rotate the material throwing outer rod, the material throwing inner rod is stretched outwards under the action of centrifugal force, the material throwing cylinder is thrown outwards, and then contacts the inner arc side wall of the workpiece to be sprayed through the roller, after waiting for stable rotation, the powder sprayer sprays powder to the through hole of the material throwing cylinder, the powder is sprayed out through the through hole to spray the inner arc side wall of the workpiece to be sprayed, after one section position of the workpiece to be sprayed is sprayed, the rotating drive device is stopped, the lifting support platform is longitudinally moved to spray the inner arc surface of the next workpiece to be sprayed, until all the inner walls are sprayed.

[0014] The present application has the advantages of:

[0015] The epoxy powder spraying robot and the construction method thereof disclosed by the present application, by adopting the telescopic material throwing outer rod and the material throwing inner rod for combination, the position of the spraying port and the wall surface distance of the workpiece to be sprayed are determined, the efficiency and quality stability of the spraying operation can be improved, the inner wall of the workpiece to be sprayed is sprayed in a rotating mode, the stability of the structure is improved, and the work efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to make the purpose, technical scheme and beneficial effects of the present application more clear, the present application provides the following drawings for illustration:

[0017] Figure 1 It is a structural schematic diagram of the spraying robot of the present application;

[0018] Figure 2 It is a structural schematic diagram of the support rod;

[0019] Figure 3 It is Figure 2 It is an enlarged view of A in the middle;

[0020] Figure 4 It is a structural schematic diagram of the rack;

[0021] Figure 5 It is a structural schematic diagram of the material throwing cylinder;

[0022] Figure 6 It is a structural schematic diagram of the powder sprayer;

[0023] Figure 7 It is a structural schematic diagram of the support leg.

[0024] The following components are labeled in the attached diagram: 1. Lifting support platform; 2. Base; 3. Outer throwing rod; 4. Inner throwing rod; 5. Throwing cylinder; 6. Powder sprayer; 7. Through hole; 8. Roller; 9. Slide groove; 10. Nozzle; 11. Support leg; 12. Moving wheel; 13. First telescopic device; 14. First connecting rod support; 15. L-shaped connecting rod; 16. Straight connecting rod; 17. Second connecting rod support; 18. Mounting seat; 19. Moving wheel bracket; 20. Push plate; 21. Second telescopic device; 22. Baffle plate; 23. First rotating shaft; 24. First gear; 25. Second rotating shaft; 26. Second gear; 27. Support rod; 28. Elastic pull rope; 29. ​​Support; 30. Motor; 31. Third gear; 32. Rack; 33. Rubber head. Detailed Implementation

[0025] like Figures 1-7 As shown, the epoxy powder coating robot disclosed in this invention includes a lifting support platform 1 and a base 2 fixedly installed on the lifting support platform 1. The lifting support platform 1 can drive the base 2 to rise and fall. The lifting support platform 1 adopts an existing scissor-fork lifting structure, which can stably drive the base 2 to rise and fall, and the operation is smooth after reaching the designated position. The base 2 adopts a hollow structure, and its interior houses a rotation drive device and a powder box, etc., which will be understood by those skilled in the art.

[0026] Furthermore, with the cooperation of the existing mobile trolley and forklift, the lifting support platform 1 can move along the longitudinal direction of the workpiece to be sprayed, inside the workpiece, to reach the designated position. A rotation drive device is installed inside the base 2. The rotation drive device adopts a geared motor 30. The output end of the rotation drive device is connected to one end of the outer material throwing rod 3 through a speed change component. It can drive the outer material throwing rod 3 to rotate in its plane. The centrifugal force of the rotation can at least drive the inner material throwing rod 4 to extend outward and reach the inner wall of the workpiece to be sprayed.

[0027] A rotary drive device drives the outer material-throwing rod 3 to rotate in a plane. An inner material-throwing rod 4 is slidably mounted on the other end of the outer rod 3. The outer end of the inner rod 4 extends outward along the axial direction of the outer rod 3. It can be understood that a limiting structure is installed at the end of the inner rod 4 inside the outer rod 3 to prevent it from being directly thrown out from the outer rod 3. A material-throwing cylinder 5 is connected to the outer end of the inner rod 4. The axis of the cylinder 5 is perpendicular to the inner rod 4. A powder sprayer 6 is installed on the inner side of the cylinder 5. Multiple through holes 7 are formed on the outer wall of the cylinder 5, facing away from the inner rod 4. A roller 8 is installed on the outer side of the cylinder 5, and the roller 8 contacts the inner arc sidewall of the workpiece to be coated, achieving a rolling fit. This invention, by combining the telescopic outer rod 3 and the inner rod 4, and through the cooperation of the roller 8 with the inner wall, determines the distance between the spray nozzle and the wall surface of the workpiece to be coated, thereby improving the efficiency and quality stability of the coating operation.

[0028] In the embodiment, the inner side of the spinning barrel 5 is provided with a sliding groove 9 for limiting the rotation of the moving wheels 12 along the circumference of the spinning barrel 5. The sliding groove 9 is fixed to the inner side of the spinning barrel 5 and extends along the inner wall of the spinning barrel 5. The nozzle 10 of the powder sprayer 6 faces the side where the through hole 7 is located. A plurality of groups of supporting legs 11 are uniformly and spacedly arranged on the outer side of the powder sprayer 6. The extending position of the supporting legs 11 can support the position of the powder sprayer 6 and can adapt to the use of spinning barrels 5 with different inner diameters to meet the actual needs. The outer end of the supporting leg 11 is connected with the moving wheel 12 which is slidingly installed in the sliding groove 9. The inner side end of the spinning barrel 5 is provided with a first telescopic device 13. The output end of the first telescopic device 13 is connected to the powder sprayer 6 and can drive the powder sprayer 6 to move along the sliding groove 9. The powder sprayer 6 can spray the inner wall of the workpiece to be sprayed within a certain longitudinal range, increase the spraying area and improve the spraying efficiency.

[0029] In the embodiment, in order to conveniently control the radial extension distance of the supporting leg 11, the present application adopts the following structure. The supporting leg 11 comprises a first connecting rod support 14, an L-shaped connecting rod 15, a straight connecting rod 16, a second connecting rod support 17, a mounting seat 18, a moving wheel support 19, a pushing disc 20 and a second telescopic device 21. The pushing disc 20 is coaxially arranged with the spinning barrel 5. The first connecting rod support 14 is fixed to one end of the powder sprayer 6. The first connecting rod support 14 is simultaneously hinged to one end of the straight connecting rod 16 and the right angle of the L-shaped connecting rod 15. That is, the L-shaped connecting rod 15 can be deflected around the connecting position of the right angle. The second connecting rod support 17 is simultaneously hinged to the L-shaped connecting rod 15 and the other end of the straight connecting rod 16. The first connecting rod support 14, the L-shaped connecting rod 15, the straight connecting rod 16 and the second connecting rod support 17 form a parallelogram connecting rod structure. The short rod of the L-shaped connecting rod 15 is simultaneously hinged to the pushing disc 20. The pushing disc 20 is connected to the output end of the second telescopic device 21. The second telescopic device 21 is installed on the inner side of the spinning barrel 5. The long rod of the L-shaped connecting rod 15 is parallel to the straight connecting rod 16. The mounting seat 18 is fixed to the second connecting rod support 17. The moving wheel support 19 is fixed to the second connecting rod support 17. The two ends of the moving wheel support 19 are both rotatably installed with the moving wheels 12. The moving wheels 12 of the same group are arranged along the length direction of the sliding groove 9. By adopting two groups of moving wheels 12 for cooperation, the stability of the spinning barrel 5 during longitudinal movement and support can be improved.

[0030] In the embodiment, two blocking plates 22 are fixed to the outer side of the spinning barrel 5 and are located on the two sides of the through hole 7. The two blocking plates 22 and the two rollers 8 form a blocking space for powder to reduce the overflow of powder.

[0031] In the embodiment, the speed change assembly comprises a first rotating shaft 23, a first gear 24, a second rotating shaft 25 and a second gear 26. The output end of the rotating driving device is connected to the first gear 24 through the first rotating shaft 23. The first gear 24 is engaged with the second gear 26. The second gear 26 is installed on the outside of the second rotating shaft 25. The second rotating shaft 25 is rotationally matched with the base 2. It can be understood that the pitch circle diameter of the first gear 24 can be larger than or smaller than the pitch circle diameter of the second gear 26. The actual torque is selected as required. At the same time, the first rotating shaft 23 and the second rotating shaft 25 are designed to be separated. The negative pressure pump can be connected to the second rotating shaft 25 to avoid interference with the rotating driving device.

[0032] In the embodiment, the second rotating shaft 25 is a hollow rotating shaft and is communicated with the negative pressure pump through a rotating joint. The inside of the outer material throwing rod 3 and the inner material throwing rod 4 is hollow. The outer material throwing rod 3 is communicated with the material throwing cylinder 5 through the inner material throwing rod 4. Since the connection position of the inner material throwing rod 4 and the material throwing cylinder 5 is away from the side where the through hole 7 is located, the negative pressure pump can collect the excess powder in the material throwing cylinder 5 to reduce the accumulation of the powder in the material throwing cylinder 5.

[0033] In the embodiment, the outside of the outer material throwing rod 3 is fixed with a support rod 27. A plurality of support rods 27 are uniformly and spacedly arranged on the outside of the outer material throwing rod 3. The support rod 27 is connected to the inner material throwing rod 4 through an elastic pull rope 28. The outside of the outer material throwing rod 3 is fixed with a support base 29. The support base 29 is installed with a motor 30. The output end of the motor 30 is connected with a third gear 31. The third gear 31 is engaged with a rack 32 formed on the surface of the inner material throwing rod 4. The end of the outer material throwing rod 3 is installed with a rubber head 33. The rubber head 33 can be sealingly matched with the rack 32. In use, the motor 30 is idle to avoid interference with the movement of the inner material throwing rod 4. When the recovery device is needed, the motor 30 with a brake can clamp the position of the inner material throwing rod 4 to facilitate recovery. Through the design of the elastic pull rope 28, when the inner material throwing rod 4 suddenly extends outward at the initial stage of starting, the force acting on the inner material throwing rod 4 can be buffered to reduce the impact of the inner material throwing rod 4 on the outer material throwing rod 3 after throwing.

[0034] In the embodiment, the bottom of the lifting support platform 1 is fixed with a guide rail. The guide rail is slidingly installed in a guide rail groove. The end of the guide rail groove is installed with a limiting seat. A damper is installed between the limiting seat and the lifting support platform 1 to consume the shaking of the lifting support platform 1 and improve the operation life of the device.

[0035] The construction method of the epoxy powder spraying robot, the spraying robot adopts the spraying robot described in any one of the above, during work, first, the lifting support platform 1 is pushed to the designated spraying position by the push plate car, the height of the lifting support platform 1 is adjusted, the output shaft of the rotating drive device is located at the center of the section of the workpiece to be sprayed, then the height position of the lifting support platform 1 is fixed, after the fixing is completed, the rotating drive device is started to make the material throwing outer rod 3 rotate, the material throwing inner rod 4 is stretched out under the action of centrifugal force, then the material throwing cylinder 5 is thrown out together, and then the roller 8 is contacted with the inner arc side wall of the workpiece to be sprayed, after waiting for stable rotation, the powder sprayer 6 is started to spray powder to the through hole 7 of the material throwing cylinder 5, the powder is sprayed out through the through hole 7 to spray the inner arc side wall of the workpiece to be sprayed, after one section position of the workpiece to be sprayed is sprayed, the rotating drive device is stopped, the lifting support platform 1 is longitudinally moved to spray the inner arc surface of the next workpiece to be sprayed, until all the inner walls are sprayed.

[0036] Finally, it should be pointed out that the above preferred embodiments are only used to illustrate the technical solutions of the present application and are not limiting, although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application.

Claims

1. An epoxy powder coating robot, characterized in that: The device includes a lifting support platform and a base fixedly mounted on the lifting support platform. The lifting support platform can move along the longitudinal direction of the workpiece to be sprayed and inside the workpiece. A rotation drive device is installed inside the base. The output end of the rotation drive device is connected to one end of the outer material ejector rod through a speed change component. The rotation drive device drives the outer material ejector rod to rotate in a plane. An inner material ejector rod is slidably installed at the other end of the outer material ejector rod. The outer end of the inner material ejector rod extends outward along the axial direction of the outer material ejector rod. A material ejector cylinder is connected to the outer end of the inner material ejector rod. A powder sprayer is installed inside the material ejector cylinder. Multiple through holes are opened on the outer wall of the material ejector cylinder, facing away from the side where the inner material ejector rod is located. Rollers are installed on the outer side of the material ejector cylinder, and the rollers contact the inner arc sidewall of the workpiece to be sprayed.

2. The epoxy powder coating robot according to claim 1, characterized in that: A chute is installed on the inner side of the throwing cylinder. The chute is fixed to the inner side of the throwing cylinder and extends along the inner wall of the throwing cylinder. The nozzle of the powder sprayer faces the side where the through hole is located. Multiple sets of support legs are evenly spaced on the outer side of the powder sprayer. The outer ends of the support legs are connected to movable wheels, which are slidably installed in the chute. A first telescopic device is installed at the inner end of the throwing cylinder. The output end of the first telescopic device is connected to the powder sprayer and can drive the powder sprayer to move along the chute.

3. The epoxy powder coating robotic method according to claim 2, characterized in that: The support leg includes a first connecting rod support, an L-shaped connecting rod, a straight connecting rod, a second connecting rod support, a mounting base, a movable wheel bracket, a push plate, and a second telescopic device. The first connecting rod support is fixed to one end of the powder sprayer. The first connecting rod support is simultaneously hinged at a right angle to one end of the straight connecting rod and the L-shaped connecting rod. The second connecting rod support is simultaneously hinged to the other ends of the L-shaped connecting rod and the straight connecting rod. The short rod of the L-shaped connecting rod is simultaneously hinged to the push plate. The push plate is connected to the output end of the second telescopic device. The second telescopic device is installed inside the discharge cylinder. The long rod of the L-shaped connecting rod is parallel to the straight connecting rod. The mounting base is fixed on the second connecting rod support. The movable wheel bracket is fixed on the second connecting rod support. Movable wheels are rotatably mounted on both ends of the movable wheel bracket. The same set of movable wheels is arranged along the length of the chute.

4. The epoxy powder coating robot according to claim 3, characterized in that: Two baffles are fixed on the outside of the feeding cylinder. The two baffles are located on both sides of the through hole, and the two baffles and the two rollers form a space for the powder to be contained.

5. The epoxy powder coating robot according to claim 1, characterized in that: The transmission assembly includes a first rotating shaft, a first gear, a second rotating shaft, and a second gear. The output end of the rotation drive device is connected to the first gear through the first rotating shaft. The first gear meshes with the second gear. The second gear is mounted on the outside of the second rotating shaft. The second rotating shaft is rotatably engaged with the base.

6. The epoxy powder coating robot according to claim 5, characterized in that: The second rotating shaft is a hollow rotating shaft and is connected to the negative pressure pump through a rotating joint. The inner sides of the outer and inner throwing rods are hollow, and the outer throwing rod is connected to the throwing cylinder through the inner throwing rod.

7. The epoxy powder coating robot according to claim 1, characterized in that: Support rods are fixed to the outer side of the material throwing outer rod. Multiple support rods are evenly spaced on the outer side of the material throwing outer rod. The support rods are connected to the material throwing inner rod by elastic ropes. A support is fixed to the outer side of the material throwing outer rod. A motor is installed on the support. The output end of the motor is connected to a third gear. The third gear meshes with a rack on the surface of the material throwing inner rod. A rubber head is installed at the end of the material throwing outer rod. The rubber head can seal with the rack.

8. The epoxy powder coating robot according to claim 1, characterized in that: The bottom of the lifting support platform is fixed with a guide rail, which is slidably installed in the guide rail groove. A limit seat is installed at the end of the guide rail groove, and a damper is installed between the limit seat and the lifting support platform.

9. A construction method for an epoxy powder coating robot, characterized in that: The painting robot is as described in any one of claims 1-8. During operation, the lifting support platform is first pushed to the designated painting position by a pusher trolley. The height of the lifting support platform is adjusted so that the output shaft of the rotary drive device is located at the center of the cross-section of the workpiece to be painted. Then, the height of the lifting support platform is fixed. After fixing, the rotary drive device is started to rotate the outer rod of the material throwing device. Under the action of centrifugal force, the inner rod of the material throwing device extends outward, and the material throwing cylinder is thrown outward together and contacts the inner arc sidewall of the workpiece to be painted through the roller. After waiting for the rotation to stabilize, the powder sprayer is started to spray powder into the through hole of the material throwing cylinder. The powder is then sprayed out through the through hole to paint the inner arc sidewall of the workpiece to be painted. After one cross-section of the workpiece to be painted is painted, the rotary drive device is stopped, and the lifting support platform is moved longitudinally to paint the inner arc surface of the next workpiece to be painted until all the inner walls are painted.

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