Sheet metal paint spraying device with adjustable range

Abstract

The invention discloses a range-adjustable metal plate paint spraying device, and belongs to the technical field of metal plate paint spraying. The range-adjustable metal plate paint spraying device comprises a horizontally-arranged base and a limiting assembly arranged on the base, the limiting assembly is used for limiting a metal plate needing to be subjected to paint spraying, the limiting assembly comprises a vertically-arranged supporting column, the range-adjustable metal plate paint spraying device further comprises a bearing assembly used for bearing a spraying gun, and the bearing assembly comprises a bearing frame; the bearing frame is semicircular and coincides with the axis of the supporting column, an arc-shaped block is slidably embedded in the bearing frame, a bearing box is vertically and fixedly inserted in the arc-shaped block, a penetrating groove is formed in the base, and a spray gun is horizontally arranged on one side of the bearing box; according to the paint spraying device, the arranged bearing box is driven by the driving piece to slide on the bearing frame under the assistance of the arc-shaped block, so that the spray gun arranged on the bearing box moves annularly and is perpendicular to the surface of the arc-shaped metal plate to be painted all the time, the metal plate paint spraying effect is improved, and a paint spraying coating is prevented from being uneven.

Description

Technical Field

[0001] The invention relates to the technical field of sheet metal spray painting, and in particular to a range-adjustable sheet metal spray painting device. Background Art

[0002] Sheet metal is a processing technology. So far, there is no complete definition of sheet metal. According to a definition in a foreign professional journal, it can be defined as: Sheet metal is a comprehensive cold processing technology for metal sheets (usually less than 6mm), including shearing, punching / cutting / compounding, folding, riveting, splicing, forming (such as car body), etc.

[0003] Sheet metal painting is a kind of automobile repair technology, which is to repair the deformed part of the automobile metal shell. For example, if the car body shell is damaged, it can be restored to its original state through sheet metal, and then by spraying special paint, the deformed metal surface of the car can be restored to the same as other intact parts and be as bright as before.

[0004] Traditionally, sheet metal painting is done manually, and the effect of the spraying depends on the actual operator's experience level. This manual sheet metal painting method has a small paint spraying area and uneven paint spraying.

[0005] In the prior art, the paint spraying device is supported by a support frame, and the paint spraying device is pushed up and down and horizontally by a propulsion component such as a cylinder. The paint spraying device moves on a plane and then paints the sheet metal. Although the above-mentioned paint spraying device replaces manual labor with machinery and can avoid the influence of manual intervention on painting, there are still certain problems. It is applicable when painting flat sheet metal, but it is not applicable to some curved sheet metals. When spraying paint, the spray gun should be kept perpendicular to the surface of the substrate to avoid the spray width from deviating to one side, resulting in uneven coating. The distance between the horizontally arranged paint spraying device and the sheet metal is certain, but due to the arc-shaped arrangement of the sheet metal, the distances from the spray gun at different positions of the sheet metal are different, and the spray gun is not perpendicular to the surface of the curved sheet metal. When spraying paint, the amount of paint sprayed on each part of the curved sheet metal is different, which can easily cause uneven coating and affect the aesthetics of the final product. Summary of the invention

[0006] The purpose of the present invention is to overcome the problems in the prior art and provide a range-adjustable sheet metal painting device, which always keeps the spray gun perpendicular to the sheet metal surface to be painted, improves the effect of sheet metal painting, and prevents uneven paint coating.

[0007] The present invention provides a range-adjustable sheet metal painting device, comprising a horizontally arranged base and a limit assembly arranged on the base, wherein the limit assembly is used to limit the sheet metal to be painted, the limit assembly comprises a vertically arranged support column, and also comprises a bearing assembly for bearing a spray gun, the bearing assembly comprises a bearing frame, the bearing frame is arranged to be semi-circular, and both ends are fixedly connected to the base by vertically arranged fixing rods, the bearing frame coincides with the axis of the support column, an arc block is slidably embedded in the bearing frame, the arc block makes a circular motion around the bearing frame, a bearing box is vertically fixedly inserted on the arc block, a through groove is opened on the base, the through groove has the same specifications as the bearing frame, one end of the bearing box passes through the through groove and is connected to a driving end of a driving member, a spray gun is horizontally arranged on one side of the bearing box, and the driving member is used to drive the bearing box to make a circular motion around the support column.

[0008] Preferably, a support plate is horizontally provided on one side of the carrying box, a first cylinder is horizontally provided on the support plate, an adjusting block is fixedly connected to the end of the first cylinder, the support plate is provided with a slide groove along the paint spraying direction of the spray gun, the adjusting block is slidably connected in the slide groove, an arc-shaped support rod is fixedly connected to one side of the support plate, an infrared rangefinder is fixedly provided on the side of the arc-shaped support rod close to the support column, a controller is provided on the support plate, the infrared rangefinder is electrically connected to the controller, and the controller is electrically connected to the first cylinder.

[0009] Preferably, the carrying box is provided with a vertical adjustment component, the vertical adjustment component includes a vertically arranged moving rod, the top of the moving rod is fixedly connected to the inner side of the carrying box by a telescopic rod, the carrying box is provided with a through slot in the vertical direction, a horizontally arranged moving block is provided in the through slot, one end of the moving block is fixedly connected to the support plate, and the other end is fixedly connected to the moving rod, a spring is sleeved on the telescopic rod, one end of the spring is fixedly connected to the moving rod, and the other end is fixedly connected to the inner side of the carrying box.

[0010] Preferably, the driving member includes a motor, the motor is fixedly connected to the bottom of the base, the motor coincides with the axis of the support column, the output end of the motor is fixedly sleeved with a connecting sleeve, and one side of the connecting sleeve is fixedly connected to a horizontally arranged first connecting rod.

[0011] Preferably, a horizontally arranged second connecting rod is fixedly connected to the bottom of the propulsion rod, and a vertically arranged roller is fixedly connected to one end of the second connecting rod away from the propulsion rod. An annular supporting plate is provided at the bottom of the base, a wave plate is fixedly connected to the supporting plate, and the roller is arranged on the wave plate.

[0012] Preferably, the limit assembly also includes a horizontally arranged support frame, the end of the support frame is fixedly connected to a vertically arranged limit plate, an adjusting screw is inserted through the limit plate, and one end of the adjusting screw is fixedly connected to a magnetic block.

[0013] Preferably, a plurality of the adjusting screws are provided, and extension lines of a plurality of the adjusting screws intersect with the axis of the supporting column.

[0014] Preferably, the support column consists of a first branch pipe and a second branch pipe, the first branch pipe is vertically fixedly connected to the base, the second branch pipe is vertically slidably embedded in the first branch pipe, a second cylinder is fixedly connected in the first branch pipe, the second cylinder is fixedly connected to the bottom of the second branch pipe, and vertically arranged support legs are fixedly connected to the bottom corners of the base.

[0015] Compared with the prior art, the beneficial effects of the present invention are: a range-adjustable sheet metal painting device of the present invention, when sheet metal painting is required, first the arc-shaped sheet metal to be painted is limited by a limiting component, and then driven by a set driving member, so that the set supporting box slides in the supporting frame with the assistance of the arc block, and the arc-shaped sheet metal is sprayed with paint by a spray gun. In the present invention, the axis of the supporting frame coincides with the axis of the supporting column. When the supporting box rotates under the drive of the driving member, on the one hand, the spray gun is always kept perpendicular to the surface of the sheet metal to be painted, and on the other hand, the surface of the sheet metal to be painted can be evenly and continuously sprayed from one side to the other.

[0016] In the present invention, the spray gun is arranged on a supporting plate, and an infrared rangefinder is arranged to measure the distance from the surface of the sheet metal. Considering that some sheet metals have irregular settings with depressions or protrusions, when the degree of the infrared rangefinder changes to a certain extent, the first cylinder will be controlled to advance or retract, so as to always keep a certain distance between the spray gun and the surface of the sheet metal to be painted, so as to prevent different amounts of paint sprayed at different positions due to the distance relationship, thereby affecting the aesthetics of the final product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall first-viewing angle structure of the present invention.

[0018] Figure 2 for Figure 1 Enlarged structural diagram at A in the middle.

[0019] Figure 3 It is a schematic structural diagram of the third viewing angle of the present invention.

[0020] Figure 4 It is a schematic diagram of the structure of the vertical adjustment component of the present invention.

[0021] Figure 5 It is a schematic diagram of the matching structure of the wave plate and the roller of the present invention.

[0022] Figure 6 It is a schematic diagram of the support column structure of the present invention.

[0023] Explanation of the reference numerals: 1. base; 2. limit assembly; 21. support column; 211. first branch pipe; 212. second branch pipe; 22. support frame; 23. adjusting screw; 24. magnetic block; 25. limit plate; 3. bearing assembly; 31. bearing frame; 32. arc block; 33. bearing box; 34. through slot; 4. spray gun; 5. support plate; 6. first cylinder; 7. adjusting block; 8. slide slot; 9. arc support rod ; 10. Infrared rangefinder; 11. Controller; 12. Vertical adjustment assembly; 121. Moving rod; 122. Telescopic rod; 123. Through-slot; 124. Moving block; 125. Spring; 126. Propelling rod; 13. Driving member; 131. Motor; 132. First connecting rod; 133. Connecting sleeve; 14. Second connecting rod; 15. Roller; 16. Load-bearing plate; 17. Corrugated plate; 18. Second cylinder. DETAILED DESCRIPTION

[0024] The following is combined with Figure 1 to Figure 6 In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be the usual meanings understood by people with general skills in the field to which the present invention belongs.

[0025] The words "first", "second" and similar words used in the patent application specification and claims of the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, but do not exclude other elements or objects. "Inside", "outside", "upper", "lower", "far", "near", "front", "back" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. The drawings in the present invention are not drawn strictly according to the actual scale. The specific size and quantity of each structure can be determined according to actual needs. The drawings described in the present invention are only schematic diagrams of the structure.

[0026] The present invention provides a range-adjustable sheet metal spray painting device, such as Figure 1 to Figure 3As shown, it includes a horizontally arranged base 1 and a limiting component 2 arranged on the base 1, the limiting component 2 is used to limit the sheet metal that needs to be painted, the limiting component 2 includes a vertically arranged support column 21, and also includes a bearing component 3 for bearing a spray gun 4, the bearing component 3 includes a bearing frame 31, the bearing frame 31 is arranged in a semi-circular shape, and both ends are fixedly connected to the base 1 through a vertically arranged fixing rod, the bearing frame 31 coincides with the axis of the support column 21, an arc block 32 is slidably embedded in the bearing frame 31, the arc block 32 makes a circular motion around the bearing frame 31, a bearing box 33 is vertically fixedly inserted on the arc block 32, a through groove 34 is opened on the base 1, the through groove 34 is the same as the specification of the bearing frame 31, one end of the bearing box 33 passes through the through groove 34 and is connected to the driving end of the driving member 13, a spray gun 4 is horizontally arranged on one side of the bearing box 33, and the driving member 13 is used to drive the bearing box 33 to make a circular motion around the support column 21.

[0027] When it is necessary to paint the sheet metal, the arc-shaped sheet metal to be painted is first limited by the limiting component 2, and then driven by the provided driving member 13, so that the provided supporting box 33 slides in the supporting frame 31 with the assistance of the arc block 32, and the arc-shaped sheet metal is sprayed with paint by the spray gun 4. In the present invention, the axis of the supporting frame 31 coincides with the axis of the support column 21. When the supporting box 33 is rotated under the drive of the driving member 13, on the one hand, the spray gun 4 is always kept perpendicular to the surface of the sheet metal to be painted, and on the other hand, the surface of the sheet metal to be painted can be evenly and continuously sprayed from one side to the other.

[0028] Preferably, Figure 1 to Figure 3 As shown, a support plate 5 is horizontally arranged on one side of the carrying box 33, a first cylinder 6 is horizontally arranged on the support plate 5, an adjusting block 7 is fixedly connected to the end of the first cylinder 6, a slide groove 8 is opened on the support plate 5 along the paint spraying direction of the spray gun 4, the adjusting block 7 is slidably connected in the slide groove 8, an arc-shaped support rod 9 is fixedly connected to one side of the support plate 5, an infrared rangefinder 10 is fixedly arranged on the side of the arc-shaped support rod 9 close to the support column 21, a controller 11 is provided on the support plate 5, the infrared rangefinder 10 is electrically connected to the controller 11, and the controller 11 is electrically connected to the cylinder.

[0029] In the present invention, the spray gun 4 is arranged on the support plate 5, and the distance from the sheet metal surface is measured by setting an infrared rangefinder 10. Considering that some sheet metals have irregular settings with depressions or protrusions, when the reading of the infrared rangefinder 10 changes to a certain extent, the first cylinder 6 will be controlled to advance or retract, so that the spray gun 4 is always kept at a certain distance from the sheet metal surface to be painted, so as to prevent different amounts of paint sprayed at different positions due to the distance relationship, thereby affecting the aesthetics of the final product.

[0030] When the value of the infrared rangefinder 10 becomes larger and exceeds the error range, a signal will be transmitted to the controller 11, and the controller 11 will control the first cylinder 6 to extend and retract, and the extension length is the same as the error distance. Similarly, when the value of the infrared rangefinder 10 becomes smaller and exceeds the error range, a signal will be transmitted to the controller 11, and the controller 11 will control the first cylinder 6 to retract, and the retraction length is the same as the error distance. The distance between the end of the spray gun 4 and the surface of the sheet metal to be painted is always kept constant to prevent different amounts of paint at different positions due to distance relationships, thereby affecting the aesthetics of the final product.

[0031] Preferably, Figure 1 to Figure 4 As shown, a vertical adjustment component 12 is provided in the carrying box 33, and the vertical adjustment component 12 includes a vertically arranged moving rod 121, and the top of the moving rod 121 is fixedly connected to the inner side of the carrying box 33 through a telescopic rod 122. A through slot 123 is provided in the vertical direction of the carrying box 33, and a horizontally arranged moving block 124 is provided in the through slot 123. One end of the moving block 124 is fixedly connected to the support plate 5, and the other end is fixedly connected to the moving rod 121. A spring 125 is sleeved on the telescopic rod 122, and one end of the spring 125 is fixedly connected to the moving rod 121, and the other end is fixedly connected to the inner side of the carrying box 33.

[0032] In the embodiment of the present invention, a vertical adjustment component 12 is arranged in the carrying box 33. When the sheet metal is sprayed with paint, the driving member 13 will simultaneously drive the vertical adjustment component 12 to perform reciprocating motion in the vertical direction, so that the moving block 124 drives the set support plate 5 to perform reciprocating motion in the vertical direction. In conjunction with the arc block 32, the sliding spray gun 4 in the carrying frame 31 will move and perform reciprocating motion up and down, thereby expanding the paint spraying area, improving the paint spraying efficiency, and evenly spraying paint on the sheet metal surface.

[0033] Preferably, Figure 3 to Figure 5 As shown, the driving member 13 includes a motor 131, which is fixedly connected to the bottom of the base 1, and the axis of the motor 131 coincides with the axis of the support column 21. A connecting sleeve 133 is fixedly provided at the output end of the motor 131, and a horizontally arranged first connecting rod 132 is fixedly connected to one side of the connecting sleeve 133. A horizontally arranged second connecting rod 14 is fixedly connected to the bottom of the propulsion rod, and a vertically arranged roller 15 is fixedly connected to the end of the second connecting rod 14 away from the propulsion rod. An annular bearing plate 16 is provided at the bottom of the base 1, and a wave plate 17 is fixedly connected to the bearing plate 16, and the roller 15 is arranged on the wave plate 17.

[0034] When it is necessary to paint the sheet metal surface, the set motor 131 is turned on, and the motor 131 drives the set connecting rod to rotate through the connecting sleeve 133, and drives the set carrying box 33 to move through the set connecting rod, so that the carrying box 33 makes a circular motion in the carrying frame 31 with the assistance of the arc block 32. When the carrying box 33 makes a circular motion, because the bottom of the moving block 124 is fixedly connected to the horizontally set second connecting rod 14 through the propulsion rod, and the roller 15 rolls on the wave plate 17, as the carrying box 33 moves, the roller 15 will roll on the wave rod, and cooperate with the telescopic rod 122 and the spring 125 to make the moving block 124 slide in the vertical direction of the carrying box 33, thereby cooperating with the sliding of the arc block 32 in the carrying frame 31, so that the spray gun 4 will move and reciprocate up and down, thereby expanding the painting area and improving the painting efficiency, and evenly spraying paint on the sheet metal surface.

[0035] Preferably, Figure 1 to Figure 6 As shown, the limit assembly 2 also includes a horizontally arranged support frame 22, and a vertically arranged limit plate 25 is fixedly connected to the end of the support frame 22. An adjusting screw 23 is inserted through the limit plate 25, and one end of the adjusting screw 23 is fixedly connected to a magnetic block 24. A plurality of adjusting screws 23 are arranged, and the extension lines of the plurality of adjusting screws 23 intersect with the axis of the support column 21. The support column 21 consists of a first branch pipe 211 and a second branch pipe 212. The first branch pipe 211 is vertically fixedly connected to the base 1, and the second branch pipe 212 is vertically slidably embedded in the first branch pipe 211. The first branch pipe 211 is fixedly connected to the second cylinder 18, and the second cylinder 18 is fixedly connected to the bottom of the second branch pipe 212. Vertically arranged support legs are fixedly connected to the bottom corners of the base 1.

[0036] In this embodiment, the support column 21 is configured to consist of a first branch pipe 211 and a second branch pipe 212. The second branch pipe 212 is pushed forward by the second cylinder 18 to adjust the height of the sheet metal on the limiting assembly 2 according to the usage. The sheet metal to be painted is placed in front of the limiting plate 25. At this time, the limiting screw is rotated to make the magnetic block 24 at its end fit with the sheet metal. The sheet metal is firmly limited by a plurality of limiting screws and a plurality of magnetic blocks 24 to prevent the sheet metal from shaking and deviating during the painting process to affect the finished product of the painting.

[0037] The method of using the range-adjustable sheet metal painting device of the present invention is as follows:

[0038] Place the sheet metal to be painted in front of the limiting plate 25, then rotate the limiting screw to make the magnetic block 24 at its end fit with the sheet metal, and the sheet metal is firmly limited by a plurality of limiting screws and a plurality of magnetic blocks 24. According to the usage, the second branch pipe 212 is pushed in by the second cylinder 18 to adjust the height of the sheet metal on the limiting assembly 2.

[0039] The motor 131 is turned on, and the motor 131 drives the connecting rod to rotate through the connecting sleeve 133, and drives the carrying box 33 to move through the connecting rod, so that the carrying box 33 makes a circular motion in the carrying frame 31 with the assistance of the arc block 32. When the carrying box 33 makes a circular motion, because the bottom of the moving block 124 is fixedly connected to the horizontally set second connecting rod 14 through the propulsion rod, and the roller 15 rolls on the wave plate 17, as the carrying box 33 moves, the roller 15 will roll on the wave rod, and cooperate with the telescopic rod 122 and the spring 125 to make the moving block 124 slide in the vertical direction of the carrying box 33, thereby cooperating with the sliding of the arc block 32 in the carrying frame 31, so that the spray gun 4 will move and reciprocate up and down, thereby expanding the paint spraying area, improving the paint spraying efficiency, and evenly spraying paint on the sheet metal surface.

[0040] During the painting process, when the value of the infrared rangefinder 10 becomes larger and exceeds the error range, a signal will be transmitted to the controller 11, and the controller 11 will control the first cylinder 6 to extend and retract, and the extension length is the same as the error distance. Similarly, when the value of the infrared rangefinder 10 becomes smaller and exceeds the error range, a signal will be transmitted to the controller 11, and the controller 11 will control the first cylinder 6 to retract, and the retraction length is the same as the error distance. The distance between the end of the spray gun 4 and the surface of the sheet metal to be painted is always kept constant to prevent the different amounts of paint sprayed at different positions due to the distance relationship, which affects the aesthetics of the final product.

[0041] 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 range-adjustable sheet metal painting device, comprising a horizontally arranged base (1) and a limiting assembly (2) arranged on the base (1), wherein the limiting assembly (2) is used to limit the position of the sheet metal to be painted, and the limiting assembly (2) comprises a vertically arranged support column (21), characterized in that: It also includes a bearing assembly (3) for bearing the spray gun (4), wherein the bearing assembly (3) includes: The bearing frame (31) is arranged in a semi-annular shape, and both ends are fixedly connected to the base (1) through vertically arranged fixing rods, and the axis of the bearing frame (31) coincides with the axis of the supporting column (21); An arc-shaped block (32) is slidably embedded on the support frame (31) and performs a circular motion around the support frame (31); The carrying box (33) is vertically fixed and inserted on the arc block (32); a through groove (34) is provided on the base (1); the through groove (34) has the same specifications as the carrying frame (31); one end of the carrying box (33) passes through the through groove (34) and is connected to the driving end of the driving member (13); a spray gun (4) is horizontally arranged on one side of the carrying box (33); the driving member (13) is used to drive the carrying box (33) to perform circular motion around the support column (21).

2. The range-adjustable sheet metal painting device according to claim 1, characterized in that: A support plate (5) is horizontally arranged on one side of the carrying box (33), a first cylinder (6) is horizontally arranged on the support plate (5), an adjusting block (7) is fixedly connected to the end of the first cylinder (6), a slide groove (8) is opened on the support plate (5) along the spraying direction of the spray gun (4), the adjusting block (7) is slidably connected in the slide groove (8), an arc-shaped support rod (9) is fixedly connected to one side of the support plate (5), an infrared rangefinder (10) is fixedly arranged on one side of the arc-shaped support rod (9) close to the support column (21), a controller (11) is arranged on the support plate (5), the infrared rangefinder (10) and the controller (11) are electrically connected, and the controller (11) and the first cylinder (6) are electrically connected.

3. The range-adjustable sheet metal painting device according to claim 2, characterized in that: A vertical adjustment component (12) is provided in the carrying box (33), and the vertical adjustment component (12) includes a vertically arranged moving rod (121), the top of the moving rod (121) is fixedly connected to the inner side of the carrying box (33) through a telescopic rod (122), a through slot (123) is provided in the vertical direction of the carrying box (33), and a horizontally arranged moving block (124) is provided in the through slot (123), one end of the moving block (124) is fixedly connected to the support plate (5), and the other end is fixedly connected to the moving rod (121); a spring (125) is sleeved on the telescopic rod (122), one end of the moving rod (121) is fixedly connected, and the other end is fixedly connected to the inner side of the carrying box (33).

4. The range-adjustable sheet metal painting device according to claim 1, characterized in that: The driving member (13) comprises a motor (131), the motor (131) is fixedly connected to the bottom of the base (1), and the axis of the motor (131) coincides with the axis of the support column (21); a first connecting rod (132) is horizontally arranged, one end of which is fixedly connected to the output shaft of the motor (131) through a connecting sleeve (133), and the other end of which is fixedly connected to the carrying box (33).

5. The range-adjustable sheet metal painting device according to claim 3, characterized in that: The bottom of the propulsion rod (126) is fixedly connected to a horizontally arranged second connecting rod (14), and one end of the second connecting rod (14) away from the propulsion rod (126) is fixedly connected to a vertically arranged roller (15). The bottom of the base (1) is provided with an annular bearing plate (16), and a wave plate (17) is fixedly connected to the bearing plate (16), and the roller (15) is arranged on the wave plate (17).

6. The range-adjustable sheet metal painting device according to claim 1, characterized in that: The limit assembly (2) further comprises a horizontally arranged support frame (22), the end of the support frame (22) being fixedly connected to a vertically arranged limit plate (25), an adjusting screw (23) being inserted through the limit plate (25), and one end of the adjusting screw (23) being fixedly connected to a magnetic block (24).

7. The range-adjustable sheet metal painting device according to claim 6, characterized in that: A plurality of the adjusting screw rods (23) are provided, and the extension lines of the plurality of the adjusting screw rods (23) intersect with the axis of the supporting column (21).

8. The range-adjustable sheet metal painting device according to claim 1, characterized in that: The support column (21) is composed of a first branch pipe (211) and a second branch pipe (212); the first branch pipe (211) is vertically fixedly connected to the base (1); the second branch pipe (212) is vertically slidably embedded in the first branch pipe (211); a second cylinder (18) is fixedly connected in the first branch pipe (211); the second cylinder (18) is fixedly connected to the bottom of the second branch pipe (212); and vertically arranged support legs are fixedly connected at the bottom corners of the base (1).

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