A metal sheet spraying device

Abstract

The present invention belongs to the technical field of sheet metal spraying, and in particular, to a metal sheet spraying device. In view of the problem in the prior art that lying spraying easily causes paint accumulation and then uneven thickness, the following solution is proposed. The device includes a dust suction mechanism and a support base. The support base includes two C-shaped support legs with openings facing the front. A connecting beam is fixed between the tops of the two C-shaped support legs. A spraying slide rail is fixed on the upper surface of the connecting beam. A spraying mechanism is arranged above the spraying slide rail. The upper surface of the support base is fixed with an annular rail seat, and the spraying direction of the spraying mechanism always faces the back of the device; an arc-shaped clamping ring with a central angle exceeding [degree] is slidably sleeved on the annular rail seat. In the present invention, since each loading station can be set in a lying manner during loading, it is beneficial for hoisting loading and roller table loading. After the metal plate body to be sprayed is fixed by the suction cups in the tensioning mechanism, it can be flipped to a vertical state and then rotated to the spraying station for spraying.

Description

Technical Field

[0001] The present invention relates to the technical field of sheet metal spraying, and particularly to a metal sheet spraying device. Background Art

[0002] With the continuous development of industrial production, metal sheet spraying is widely used in the manufacturing industry. To improve production efficiency, the traditional manual spraying method can no longer meet the needs of large-scale and high-precision production. Therefore, automated and precise spraying equipment has become an indispensable part of industrial production. The metal sheet spraying equipment can achieve high-efficiency and large-batch spraying operations through an automated control system.

[0003] After retrieval, when the existing sheet metal spraying machines spray sheet materials, in order to make it more convenient to load and unload the metal sheet materials, the sheet materials are often sprayed in a lying flat manner. However, this spraying method has higher requirements for the evenness of the material output of the spray gun. Once the material output is uneven, it is extremely easy to cause uneven coating thickness on the plate surface, and even quality defects such as bubbling are formed during the subsequent drying process. Therefore, we propose a new spraying method to solve the many disadvantages brought by spraying the sheet materials in a lying flat manner. Summary of the Invention

[0004] Aiming at the technical problem that the lying flat spraying in the prior art is prone to cause paint accumulation and then result in uneven thickness, the present invention adopts the following technical solutions:

[0005] A metal sheet spraying device includes a dust suction mechanism and a support base. The support base includes two C-shaped support legs with openings facing the front. A connecting beam is fixed between the tops of the two C-shaped support legs. The upper surface of the connecting beam is fixed with a spraying slide rail, and a spraying mechanism is arranged above the spraying slide rail. The upper surface of the support base is fixed with an annular rail seat, and the spraying direction of the spraying mechanism always faces the back of the device; an arc-shaped clamping ring with a central angle exceeding 180 degrees is slidably sleeved on the annular rail seat. At both ends of the upper surface of the arc-shaped clamping ring, shaft rod rotating frames are respectively fixed in a centrosymmetric distribution. The tops of the shaft rod rotating frames are all rotatably connected with fixed worm gear discs. The central plane of the fixed worm gear disc passes through the vertical center line of the annular rail seat, and an installation notch is opened on the circumferential surface of the fixed worm gear disc. A supporting rail with an opening away from the shaft rod rotating frame is fixed in the installation notch; at both ends of the outer arc side of the arc-shaped clamping ring, servo motors are respectively fixed in a centrosymmetric distribution, and the end of the output shaft of the servo motor is fixed with a worm gear sleeve one that horizontally extends towards the middle and meshes with the fixed worm gear disc on the corresponding side; a tensioning mechanism is slidably connected to each supporting rail. The tensioning mechanism includes boss sliders slidably connected to the chutes at both ends of the supporting rail. On one side of the two boss sliders away from the bottom of the chute, arched fixing rods are respectively fixed, and suction cups are arranged at both ends of the arched fixing rods.

[0006] A further setting of the present invention is that the dust suction mechanism includes a horizontal crossbeam frame fixed above the rear side of the device, and the crossbeam frame is parallel to the spraying slide rail. Vertically and parallel guiding slide rods are respectively fixed near both ends of the lower surface of the crossbeam frame, and the same dust suction frame with an overall downward-opening U-shaped structure is slidably connected between the bottom ends of the two guiding slide rods. A strip-shaped air hole is opened on the front surface of the dust suction frame, and an exhaust pipe is reserved at the top end of the dust suction frame for connecting to a suction device.

[0007] A further setting of the present invention is that a pulley frame is provided in the middle of the top end of the crossbeam frame, a grooved fixed pulley is provided in the middle of the pulley frame, and a suspension rope is slidably connected in the pulley groove of the grooved fixed pulley. One end of the suspension rope is fixed to the top end of the dust suction frame. When in use, if the area of the metal plate body is larger than the inner edge size of the dust suction frame, it is only necessary to control the suspension rope to lift the whole dust suction frame.

[0008] A further setting of the present invention is that the spraying mechanism includes an electric slider slidably connected to the spraying slide rail, and a distance adjusting plate is fixed on the upper surface of the electric slider for adjusting the distance between the surface of the metal plate body and the nozzle of the spray gun during spraying. A vertical slide rail and a high-speed blower are fixed on the upper surface of the distance adjusting plate. A reciprocating slider is slidably connected inside the vertical slide rail, and a spray gun extending backward is fixed on the side of the reciprocating slider away from the bottom of the groove. The air inlet end of the spray gun is connected to the air outlet of the high-speed blower through a hose, and the liquid inlet of the spray gun is communicated with a suction pipe, and the other end of the suction pipe is provided with a raw material barrel; thus, it can uniformly spray the vertically placed metal plate body from top to bottom during use.

[0009] A further setting of the present invention is that a double-limit fixing strip is fixed in the middle of the circumferential outer wall of the annular rail seat at the front. Two blocking blocks one and two with different distances from the center of the circle are fixed on the upper surface of the double-limit fixing strip. The blocking blocks one and two are both provided with a contact surface passing through the center of the circle, and pressure sensors are embedded on both contact surfaces; two symmetrically arranged movable blocking blocks one and two are respectively fixed on the lower surfaces of the two motor fixing brackets, and the movable blocking blocks one and two are both reserved with a contact surface passing through the center of the circle; by setting the blocking blocks one and two and cooperating with the pressure sensors embedded in the middle of their contact surfaces, when switching between the two working positions, it is only necessary to reciprocally push the arc-shaped clamping ring to rotate. When reaching the spraying working position, it will automatically touch the pressure sensor and then automatically stop. The mechanism for driving the arc-shaped clamping ring to reciprocally rotate can be set as a servo motor and a rubber wheel, and the circumferential outer wall of the rubber wheel tightly contacts the circumferential outer wall of the arc-shaped clamping ring.

[0010] A further setting of the present invention is that balls are embedded in the inner wall of the bottom of the arc-shaped clamping ring, and an annular groove adapted to the position of the balls is provided on the upper surface of the annular rail seat, which can reduce the wear when the arc-shaped clamping ring rotates.

[0011] A further configuration of the present invention is that a groove is opened at the end of the bottom of the support rail away from the fixed worm gear, and a spirit level is embedded in the groove, which can ensure that the metal plate body can be quickly rotated to an approximately vertical state before spraying, thereby improving the loading efficiency during spraying.

[0012] A further arrangement of the present invention is that an anti-slip bearing is embedded near the middle of the groove bottom of the support rail, and the middle of the anti-slip bearing is rotatably connected to a transmission rod perpendicular to the groove bottom of the support rail, and a rubbing gear and a worm gear are fixed at both ends of the transmission rod, and rack rods symmetrically distributed about the center of the rubbing gear are fixed on opposite sides of the two arched fixed rods, and the rubbing gear is meshed with the two rack rods at the same time; a shaft rod holder is provided near the middle of the back of the support rail, and the middle of the shaft rod holder is rotatably connected to a worm gear that is meshed with the worm gear.

[0013] A further arrangement of the present invention is that the suction cup includes a fixed sleeve with an overall annular tube structure, and an annular ridge is reserved at the end of the fixed sleeve away from the support rail, a reset rubber sleeve is sealed and sleeved at the annular ridge, and a spring support block is fixed to the end of the circumferential inner wall of the fixed sleeve away from the annular ridge, a reset spring is fixed to the surface of the spring support block, and a sealing cover is fixed to the end of the reset spring away from the reset rubber sleeve; a load-bearing pressure plate is embedded in the inner wall of the reset rubber sleeve near the flared portion, and reset springs are fixed with equal distances between the load-bearing pressure plate and the annular ridge; when in use, when the metal plate body needs to be adsorbed, it is only necessary to press downward, and when the adsorption needs to be removed, it is only necessary to pull the sealing cover along the extension direction of the reset spring.

[0014] A further configuration of the present invention is that a sealing ring is embedded near the edge of one side of the sealing cover close to the pipe opening, and a pull ring is reserved in the middle of the sealing cover to improve the sealing effect and facilitate air release and desorption.

[0015] The beneficial effects of the present invention are:

[0016] 1. By setting an arc-shaped clamping ring that is slidably connected to the annular rail seat and cooperating with two centrally symmetrical loading stations fixed above it, since each loading station can be set to a lying position when loading, it is conducive to hoisting loading and roller loading. After the metal plate body to be sprayed is fixed by the suction cup in the tensioning mechanism, it can be turned over to a vertical state and then rotated to the spraying station for spraying.

[0017] 2. By setting up the dust suction frame, you can clamp the dust suction frame on the back side of the vertical metal plate body near the two sides and top edges during spraying. At this time, the excess oil mist sprayed to the edge can be sucked out, thereby reducing the pollution of the oil mist to the surrounding environment.

[0018] 3. Through the set tensioning mechanism, when loading materials, after adsorbing the thin plate parts, they can be pulled towards both ends, and then the metal plate body to be sprayed can be flattened, flattening the metal plate body with the smallest fixed points to ensure that the distance from each spraying point to the spray gun is the same. Description of the Drawings

[0019] Figure 1 Schematic diagram of the overall structure of a metal plate spraying device proposed by the present invention during spraying;

[0020] Figure 2 Schematic diagram of the bottom-up three-dimensional structure of a metal plate spraying device proposed by the present invention after lifting the dust suction frame;

[0021] Figure 3 Top view of a metal plate spraying device proposed by the present invention after removing the dust suction mechanism;

[0022] Figure 4 A metal plate spraying device proposed by the present invention Figure 3 Schematic diagram of the sectional structure along the A-A line in the device;

[0023] Figure 5 Exploded view of the tensioning mechanism in a metal plate spraying device proposed by the present invention;

[0024] Figure 6 Cross-sectional view of the suction cup in a metal plate spraying device proposed by the present invention;

[0025] Figure 7 Assembly drawing of the arc-shaped clamping ring in a metal plate spraying device proposed by the present invention.

[0026] In the figure: 1. Support base; 2. Ring rail seat; 3. Dust suction frame; 4. Suspension rope; 5. Cross beam frame; 6. Pulley frame; 7. Guide slide bar; 8. Strip-shaped air holes; 9. Spray gun; 10. Vertical slide rail; 11. High-speed blower; 12. Arc-shaped clamping ring; 13. Tensioning mechanism; 131. Transmission rod; 132. Convex platform slider; 133. Arch-shaped fixed rod; 134. Rack rod; 135. Rubbing gear; 136. Shaft rod seat; 137. Worm one; 138. Suction cup; 1381. Fixed sleeve; 1382. Reset rubber sleeve; 1383. Bearing pressure plate; 1384. Reset spring; 1385. Spring support block; 1386. Reset tension spring; 1387. Sealing cover; 14. Support rail; 15. Fixed worm disk; 151. Shaft rod rotating frame; 16. Motor fixed support plate; 161. Movable stop block one; 162. Movable stop block two; 17. Double limit fixing strip; 171. Blocking block one; 172. Blocking block two; 173. Pressure sensor; 18. Raw material barrel; 19. Distance adjusting plate; 20. Spraying slide rail; 2001. Electric slider; 21. Metal plate body; 22. Servo motor. Detailed implementation mode

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0028] In this embodiment, referring to Figures 1-7 , a metal sheet spraying device includes a dust suction mechanism and a support base 1. The support base 1 includes two C-shaped support legs with openings facing the front. A connecting beam is fixed between the tops of the two C-shaped support legs, and a spraying slide rail 20 is fixed on the upper surface of the connecting beam. A spraying mechanism is arranged above the spraying slide rail 20. A circular rail seat 2 is fixed on the upper surface of the support base 1, and the spraying direction of the spraying mechanism always faces the back of the device; an arc-shaped clamping ring 12 with a central angle exceeding 180 degrees is slidably sleeved on the circular rail seat 2. Shaft rod rotating frames 151 distributed in central symmetry are respectively fixed on the upper surface of the arc-shaped clamping ring 12 near both ends. Fixed worm gear discs 15 are rotatably connected to the tops of the shaft rod rotating frames 151. The central plane of the fixed worm gear disc 15 passes through the vertical center line of the circular rail seat 2, and an installation notch is opened on the circumferential surface of the fixed worm gear disc 15. A supporting rail 14 with an opening away from the shaft rod rotating frame 151 is fixed in the installation notch; servo motors 22 distributed in central symmetry are respectively fixed on the outer arc side of the arc-shaped clamping ring 12 near both ends, and a worm gear sleeve one horizontally extending towards the middle and meshing with the fixed worm gear disc 15 on the corresponding side is fixed to the end of the output shaft of the servo motor 22; a tensioning mechanism 13 is slidably connected to each supporting rail 14, and the tensioning mechanism 13 includes boss sliders 132 slidably connected to the chutes near both ends of the supporting rail 14. Arch-shaped fixing rods 133 are fixed to the sides of the two boss sliders 132 away from the bottom of the chute, and suction cups 138 are arranged at both ends of the arch-shaped fixing rods 133.

[0029] Specifically, by setting the arc-shaped clamping ring 12 slidably connected to the circular rail seat 2 and cooperating with the two upper feeding stations symmetrically arranged above it, since each upper feeding station can be set in a lying position during feeding, it is beneficial for hoisting feeding and roller table feeding. After the metal plate body 21 to be sprayed is fixed by the suction cups 138 in the tensioning mechanism 13, it can be turned to a vertical state and then rotated to the spraying station for spraying.

[0030] In the present invention, the dust suction mechanism includes a horizontal crossbeam frame 5 fixed above the rear side of the device, and the crossbeam frame 5 is parallel to the spraying slide rail 20. Vertically and parallel guide slide rods 7 are respectively fixed near both ends of the lower surface of the crossbeam frame 5. A dust suction frame 3 with an overall downward-opening U-shaped structure is slidably connected between the bottom ends of the two guide slide rods 7. A strip-shaped air hole 8 is formed on the front surface of the dust suction frame 3, and an exhaust pipe is reserved at the top end of the dust suction frame 3 for connecting to a suction device. By providing the dust suction frame 3, during spraying, the dust suction frame 3 can be clamped at the rear side near both sides and the top edge of the vertical metal plate body 21, and at this time, the excess oil mist sprayed to the edge can be sucked, thereby reducing the pollution of the oil mist to the surrounding environment.

[0031] Refer to Figure 1 , a pulley frame 6 is provided in the middle of the top end of the crossbeam frame 5, and a grooved fixed pulley is provided in the middle of the pulley frame 6. A suspension rope 4 is slidably connected in the groove of the grooved fixed pulley. One end of the suspension rope 4 is fixed to the top end of the dust suction frame 3. When in use, if the area of the metal plate body 21 is larger than the inner edge size of the dust suction frame 3, only need to control the suspension rope 4 to lift the dust suction frame 3 as a whole.

[0032] Refer to Figures 1-4 , the spraying mechanism includes an electric slider 2001 slidably connected to the spraying slide rail 20. A distance adjusting plate 19 is fixed on the upper surface of the electric slider 2001 for adjusting the distance between the surface of the metal plate body 21 and the muzzle of the spray gun 9 during spraying. A vertical slide rail 10 and a high-speed air blower 11 are fixed on the upper surface of the distance adjusting plate 19. A reciprocating slider is slidably connected inside the vertical slide rail 10. The reciprocating slider is fixed with a spray gun 9 extending backward on the side away from the bottom of the groove. The air inlet end of the spray gun 9 is connected to the air outlet of the high-speed air blower 11 through a hose, and the liquid inlet of the spray gun 9 is communicated with a suction pipe. The other end of the suction pipe is provided with a raw material barrel 18; thus, the vertical metal plate body 21 can be evenly sprayed from top to bottom during use.

[0033] Refer to Figure 4 and Figure 7, on the middle of the front side of the circumferential outer wall of the annular rail seat 2, a double-limit fixing strip 17 is fixed, and on the upper surface of the double-limit fixing strip 17, two blocking blocks 171 and 172 with different distances from the center of the circle are fixed. Both the blocking block 171 and the blocking block 172 are provided with a contact surface passing through the center of the circle, and pressure sensors 173 are embedded on both contact surfaces; on the circumferential outer wall of the arc-shaped clamping ring 12 near both ends, motor fixing brackets 16 are fixed respectively. The two motor fixing brackets 16 are symmetrically distributed about the center. On the lower surfaces of the two motor fixing brackets 16, symmetrically arranged movable blocking blocks 161 and 162 are fixed respectively, and both the movable blocking block 161 and the movable blocking block 162 are reserved with a contact surface passing through the center of the circle; by setting the blocking block 171 and the blocking block 172, and cooperating with the pressure sensors 173 embedded in the middle of their contact surfaces, when switching between two working positions, it is only necessary to reciprocally push the arc-shaped clamping ring 12 to rotate. When reaching the spraying position, it will automatically touch the pressure sensor 173 and then stop automatically. The mechanism for driving the arc-shaped clamping ring 12 to rotate reciprocally can be set with a servo motor and a rubber wheel, and the circumferential outer wall of the rubber wheel tightly contacts the circumferential outer wall of the arc-shaped clamping ring 12.

[0034] In the present invention, balls are embedded in the inner wall of the groove bottom of the arc-shaped clamping ring 12, and an annular groove adapted to the positions of the balls is arranged on the upper surface of the annular rail seat 2, which can reduce the wear when the arc-shaped clamping ring 12 rotates.

[0035] In the present invention, embedding grooves are respectively opened at one ends of the groove bottoms of the supporting rails 14 far from the fixed worm wheel disc 15, and spirit levels are embedded in the embedding grooves respectively, which can ensure that the metal plate body 21 can be quickly rotated to an approximately vertical state before spraying, and improve the feeding efficiency during spraying.

[0036] Refer to Figures 5-6 , an anti-drop bearing is embedded in the groove bottom of the supporting rail 14 near the middle, and a transmission rod 131 perpendicular to the groove bottom of the supporting rail 14 is rotatably connected in the middle of the anti-drop bearing. A rubbing gear 135 and a worm wheel 137 are respectively fixed at both ends of the transmission rod 131. Rack bars 134 symmetrically distributed about the rubbing gear 135 are respectively fixed on the opposite sides of the two arched fixing rods 133. The rubbing gear 135 meshes with both rack bars 134 at the same time; a shaft rod seat 136 is arranged near the middle on the back surface of the supporting rail 14, and a worm 1 meshing with the worm wheel 137 is rotatably connected in the middle of the shaft rod seat 136. By setting the tensioning mechanism 13, during feeding, after adsorbing the thin plate part, it is pulled towards both ends, and then the metal plate body 21 to be sprayed can be flattened, and the metal plate body 21 is flattened with the smallest fixing points, ensuring that the distance between each spraying point and the spray gun 9 is the same.

[0037] Refer to Figure 6, the suction cup 138 includes a fixed sleeve 1381 which is integrally in a ring-shaped tube structure, and a ring-shaped convex rib is reserved at one end of the fixed sleeve 1381 away from the support rail 14. A reset rubber sleeve 1382 is hermetically sleeved at the ring-shaped convex rib. One end of the inner circumferential wall of the fixed sleeve 1381 away from the ring-shaped convex rib is fixed with a spring support block 1385. A reset tension spring 1386 is fixed on the surface of the spring support block 1385, and one end of the reset tension spring 1386 away from the reset rubber sleeve 1382 is fixed with a sealing cover 1387; a bearing pressure plate 1383 is embedded in the inner wall of the reset rubber sleeve 1382 near the flared opening, and a plurality of reset springs 1384 are fixed between the bearing pressure plate 1383 and the ring-shaped convex rib at equal intervals; when in use, when it is necessary to adsorb the metal plate body 21, just press it downwards, and when it is necessary to remove the adsorption, just pull the sealing cover 1387 along the extension direction of the reset tension spring 1386.

[0038] Refer to Figure 6 , a sealing ring is embedded near the edge on one side of the sealing cover 1387 close to the pipe orifice, and a pull ring is reserved in the middle of the sealing cover 1387 to improve the sealing effect and facilitate deflation to release the adsorption.

[0039] Working principle: First, control the support rail 14 rotated to the front to rotate to a lying position with the opening facing upwards, and then hoist the metal plate body 21 to be sprayed or transport it to the four suction cups 138 of the tensioning mechanism 13 through a roller path. Then, finely adjust and align the metal plate body 21, and then press down at the four corners to ensure that the metal plate body 21 is adsorbed; then, reversely control the output shaft of the servo motor 22 to rotate, and then erect the adsorbed metal plate body 21. Then, rotate the arc-shaped clamping ring 12 to rotate the erected metal plate body 21 to the rear spraying position. Then, control the dust suction frame 3 to descend, and at this time, spraying can start; when spraying, the dust suction frame 3 is stuck at the rear of the vertical metal plate body 21 near the edges on both sides and the top, and at this time, the excess oil mist about to be sprayed onto the edges is sucked, thereby reducing the pollution of the oil mist to the surrounding environment.

[0040] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A metal sheet spraying device, comprising a dust suction mechanism and a support base (1). The support base (1) includes two C-shaped support legs with openings facing the front. A connecting beam is fixed between the tops of the two C-shaped support legs, and a spraying slide rail (20) is fixed on the upper surface of the connecting beam. A spraying mechanism is arranged above the spraying slide rail (20), characterized in that, The upper surface of the support base (1) is fixedly provided with an annular rail base (2), and the spraying direction of the spraying mechanism always faces the back of the device; an arc-shaped clamping ring (12) with a central angle exceeding 180 degrees is slidably sleeved on the annular rail base (2). The upper surface of the arc-shaped clamping ring (12) is respectively fixedly provided with shaft rod rotating frames (151) distributed in central symmetry near both ends. The tops of the shaft rod rotating frames (151) are rotatably connected with fixed worm gear disks (15). The central plane of the fixed worm gear disk (15) passes through the vertical center line of the annular rail base (2), and an installation notch is formed on the circumferential surface of the fixed worm gear disk (15). A supporting rail (14) with an opening away from the shaft rod rotating frame (151) is fixed in the installation notch; on the outer arc side of the arc-shaped clamping ring (12) near both ends, servo motors (22) distributed in central symmetry with each other are respectively fixedly provided, and the end of the output shaft of the servo motor (22) is fixedly provided with a worm gear sleeve one extending horizontally towards the middle and meshing with the fixed worm gear disk (15) on the corresponding side; a tensioning mechanism (13) is slidably connected to each of the supporting rails (14). The tensioning mechanism (13) includes boss sliders (132) slidably connected in the chutes near both ends of the supporting rail (14). On the side of the two boss sliders (132) away from the bottom of the chute, arched fixing rods (133) are respectively fixedly provided, and suction cups (138) are arranged at both ends of the arched fixing rod (133). The dust collection mechanism includes a horizontal cross beam frame (5) fixed above the rear side of the device, and the cross beam frame (5) is parallel to the spraying slide rail (20). Vertically and parallel guide slide rods (7) are respectively fixedly provided near both ends of the lower surface of the cross beam frame (5). A dust collection frame (3) with an overall downward opening and a U-shaped structure is slidably connected between the bottoms of the two guide slide rods (7). A strip-shaped air hole (8) is formed on the front surface of the dust collection frame (3), and an exhaust pipe is reserved at the top of the dust collection frame (3).

2. The metal sheet spraying device according to claim 1, characterized in that, A pulley frame (6) is arranged in the middle of the top end of the cross beam frame (5), and a grooved fixed pulley is arranged in the middle of the pulley frame (6). A lifting rope (4) is slidably connected in the pulley groove of the grooved fixed pulley. One end of the lifting rope (4) is fixed to the top end of the dust collection frame (3).

3. The metal sheet spraying device according to claim 1, characterized in that, The spraying mechanism includes an electric slider (2001) slidably connected to the spraying slide rail (20). A distance adjusting plate (19) is fixedly provided on the upper surface of the electric slider (2001). A vertical slide rail (10) and a high-speed air blower (11) are fixedly provided on the upper surface of the distance adjusting plate (19). A reciprocating slider is slidably connected inside the vertical slide rail (10). A spray gun (9) extending towards the rear side is fixedly provided on the side of the reciprocating slider away from the bottom of the chute. The air inlet end of the spray gun (9) is connected to the air outlet of the high-speed air blower (11) through a hose, and the liquid inlet of the spray gun (9) is communicated with a suction pipe. The other end of the suction pipe is provided with a raw material barrel (18).

4. A metal sheet spraying device according to claim 1, characterized in that, On the circumferential outer wall of the annular rail seat (2), a double limit fixing strip (17) is fixed in the middle of the front. On the upper surface of the double limit fixing strip (17), there are two blocking blocks one (171) and blocking blocks two (172) with different distances from the center of the circle. The blocking blocks one (171) and blocking blocks two (172) are both provided with a contact surface passing through the center of the circle, and pressure sensors (173) are embedded on both contact surfaces. On the circumferential outer wall of the arc-shaped clamping ring (12), motor fixing brackets (16) are fixed near both ends. The two motor fixing brackets (16) are symmetrically distributed about the center. On the lower surfaces of the two motor fixing brackets (16), symmetrically arranged movable blocking blocks one (161) and movable blocking blocks two (162) are fixed respectively, and the movable blocking blocks one (161) and movable blocking blocks two (162) are both reserved with a contact surface passing through the center of the circle.

5. A metal sheet spraying device according to claim 1, characterized in that, On the inner wall of the groove bottom of the arc-shaped clamping ring (12), balls are embedded, and on the upper surface of the annular rail seat (2), an annular groove adapted to the positions of the balls is provided.

6. The spraying device for metal sheet according to claim 1, wherein On the end of the groove bottom of the supporting rail (14) far from the fixed worm wheel disc (15), embedding grooves are opened, and spirit levels are embedded in the embedding grooves.

7. The spraying device for metal sheet according to claim 1, characterized in that, On the groove bottom of the supporting rail (14) near the middle, an anti-disengagement bearing is embedded. In the middle of the anti-disengagement bearing, a transmission rod (131) perpendicular to the groove bottom of the supporting rail (14) is rotatably connected. At both ends of the transmission rod (131), a rubbing gear (135) and a worm wheel one (137) are fixed respectively. On the opposite sides of the two arched fixing rods (133), rack bars (134) symmetrically distributed about the rubbing gear (135) are fixed respectively. The rubbing gear (135) is simultaneously meshed with the two rack bars (134). On the back of the supporting rail (14) near the middle, a shaft rod clamping seat (136) is provided, and in the middle of the shaft rod clamping seat (136), a worm one meshed with the worm wheel one (137) is rotatably connected.

8. A metal sheet spraying device according to claim 7, characterized in that, The suction cup (138) includes a fixed sleeve (1381) with an overall annular tube structure. At one end of the fixed sleeve (1381) far from the supporting rail (14), an annular convex rib is reserved. A reset rubber sleeve (1382) is hermetically sleeved at the annular convex rib. At one end of the inner wall of the fixed sleeve (1381) far from the annular convex rib, a spring support block (1385) is fixed. A reset tension spring (1386) is fixed on the surface of the spring support block (1385). At one end of the reset tension spring (1386) far from the reset rubber sleeve (1382), a sealing cover (1387) is fixed. On the inner wall of the reset rubber sleeve (1382) near the flared opening, a bearing pressure plate (1383) is embedded, and reset springs (1384) are fixed between the bearing pressure plate (1383) and the annular convex rib at equal distances.

9. The metal sheet spraying device according to claim 8, wherein, On the side of the sealing cover (1387) near the pipe orifice and near the edge, a sealing ring is embedded, and a pull ring is reserved in the middle of the sealing cover (1387).

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