Automobile parts processing spraying equipment

Abstract

The present invention relates to the field of spraying technology, and discloses an automobile parts processing spraying equipment, including: a spraying machine arm, a machine arm head is provided at the output end of the spraying machine arm, a spray gun head is provided at the output end of the machine arm head, a bull horn nozzle is installed at the output end of the spray gun head, two bull horn arms are provided on the bull horn nozzle, an air jet hole is provided inside the bull horn nozzle, a side chamber is provided on the side of the bull horn arm facing the air jet hole, and a dredging mechanism for dredging the blocked air jet hole is provided inside the side chamber. When the pressure measuring mechanism of the present invention detects that the air pressure inside the air jet hole channel in the two bull horn nozzles changes, the cleaning brush is inserted into the blocked air jet hole through the extension of the telescopic cylinder to clean up the paint residue, and the air jet hole is rubbed back and forth until the air jet holes on both sides are circulated, ensuring that the air pressure of the air jet holes on both sides is the same, so that the pressure of the spraying liquid is balanced, thereby reducing the situation of uneven spraying.

Description

Technical Field

[0001] The invention relates to the field of spraying, and more specifically, to a kind of automobile parts processing spraying equipment. Background Art

[0002] A spraying robot arm is an automated device that is usually used for painting and spraying tasks in industrial production. It combines the flexibility and precision of a robot arm with the high efficiency of a spraying system and can be widely used in the automotive manufacturing industry. These robot arms are usually composed of multiple joints and can be moved and positioned in three-dimensional space. They are equipped with nozzles at the end to evenly spray paint, lacquer or other coatings onto the surface of the workpiece.

[0003] Correctly install the bull horn nozzle on the spraying equipment, and adjust the nozzle angle and spraying mode as needed. Before formal spraying, do some test spraying to adjust the nozzle angle and spraying pressure, and ensure that the spraying effect meets the requirements. When the nozzle and spraying equipment are adjusted, start spraying the workpiece;

[0004] However, the air hole of the bull horn nozzle may be blocked during operation. The different air pressures on both sides of the air hole of the bull horn nozzle will cause an imbalance in the pressure of the sprayed liquid, resulting in uneven spraying, which is manifested as different shades of color or obvious mottled. When the nozzle is spraying paint, it is difficult for the operator to promptly detect changes in the spray range when the nozzle is spraying paint, which affects the spraying effect. For this reason, we propose a spraying equipment for automobile parts processing. Summary of the invention

[0005] The present invention provides an automobile parts processing spraying equipment, which solves the technical problem in the related art that when a nozzle is spraying paint, an operator is difficult to timely discover changes in the spraying range when the nozzle is spraying paint, thereby affecting the spraying effect.

[0006] The present invention provides an automobile parts processing spraying equipment, comprising: a spraying machine arm, a machine arm head is arranged at the output end of the spraying machine arm, a spray gun head is arranged at the output end of the machine arm head, a bull horn nozzle is installed at the output end of the spray gun head, two bull horn arms are arranged on the bull horn nozzle, an air jet hole is opened inside the bull horn nozzle, a side chamber is opened on one side of the bull horn arm facing the air jet hole, and a dredging mechanism for dredging the blocked air jet hole is arranged inside the side chamber;

[0007] The unblocking mechanism includes a telescopic cylinder, a cleaning brush is fixedly arranged on the outer wall of one end of the telescopic cylinder close to the jet hole, and a plurality of air release holes are opened on the outer wall of the end of the telescopic cylinder away from the jet hole, which are used to control the telescopic cylinder and the cleaning brush to reciprocate into the jet hole to clear the blockage;

[0008] The outer wall of the bull horn nozzle is provided with a pressure measuring mechanism, which includes a transparent tube. Both ends of the transparent tube are provided with ventilation pipes which are respectively connected with the air passages of the jet holes in the two bull horn arms, and are used to display the air pressure changes inside the air passages of the jet holes in the two bull horn arms in real time.

[0009] Furthermore, a slide plate is slidably arranged at the inner center position of the transparent tube, and the diameter of the slide plate is the same as the inner diameter of the transparent tube, telescopic air bags are fixedly arranged on both sides of the slide plate, two pull wires passing through the transparent tube are arranged on the slide plate, and a control wire passing through the transparent tube is arranged on the slide plate between the two pull wires.

[0010] Furthermore, an expansion film is fixedly arranged on the side of the two telescopic airbags away from the skateboard, the diameter of the telescopic airbags is smaller than the diameter of the skateboard, and the space on the side of the expansion film away from the telescopic airbags is not connected to the skateboard and the space where the two telescopic airbags are located.

[0011] Furthermore, an air-blocking disk is slidably arranged inside the telescopic cylinder, a telescopic inner column is fixedly arranged on the side of the air-blocking disk away from the air jet hole, a plurality of reset ropes are fixedly arranged on the air-blocking disk outside the telescopic inner column, and both the telescopic inner column and the air-blocking disk are hollow structures, and at the same time, the end of the telescopic inner column away from the air-blocking disk is fixedly connected to the side chamber.

[0012] Furthermore, one end of the telescopic inner column away from the air blocking plate is connected to an air inlet fixed in the bull-horn nozzle through a pipe, a sealing plug is fixedly arranged inside the air inlet, and the sealing plug and the air inlet have a corner that is not fixed, and the sealing plug and the air inlet are fixedly connected to a pull wire at the unfixed corner.

[0013] Furthermore, the nozzle position of the bull horn nozzle is fixedly connected to a paint inlet pipe, and a top box is fixedly provided at one end of the paint inlet pipe away from its nozzle. The diameter of the top box is larger than the diameter of the paint inlet pipe. A valve is connected to the air inlet end of the top box, the air inlet end of the valve is connected to the air supply end of the spray gun head, and the switch of the valve is connected to the control line.

[0014] Furthermore, a liquid inlet auxiliary pipe is fixedly arranged on the side of the paint inlet pipe, and the liquid inlet auxiliary pipe is aligned with the paint outlet of the spray gun head connection end, and the liquid inlet auxiliary pipe and the paint inlet pipe are interconnected and form an H shape.

[0015] Furthermore, a telescopic air column is fixedly arranged inside the top box, and one end of the telescopic air column away from the air inlet end of the top box is fixedly connected to a piston disk, and the diameter of the piston disk is the same as the inner diameter of the paint inlet tube, and the outer wall of the telescopic air column is spirally wrapped with an elastic band.

[0016] Furthermore, an expansion disk is arranged inside the piston disk, the air inlet end of the expansion disk is fixedly connected to an inner tube, and a plurality of exhaust holes are opened on the outer wall of one end of the inner tube close to the expansion disk, and the air inlet end of the inner tube is connected to the air inlet end of the top box.

[0017] Furthermore, a negative pressure plate is arranged below the internal expansion plate of the piston plate, a plurality of negative pressure holes are opened inside the negative pressure plate, the negative pressure plate is higher than the bottom edge of the piston plate, and the outer wall of the piston plate is provided with stripes.

[0018] The beneficial effects of the present invention are:

[0019] When the pressure measuring mechanism of the present invention detects that the air pressure inside the jet hole channels of the two bull-horn nozzles changes, the cleaning brush is inserted into the blocked jet hole through the extension of the telescopic cylinder to clean up the paint residue, and the jet hole is rubbed back and forth until the jet holes on both sides are flowing, ensuring that the air pressure of the jet holes on both sides is the same, so that the pressure of the sprayed liquid is balanced, thereby reducing the situation of uneven spraying;

[0020] When the air pressure inside the jet hole channels in the two bull-horn nozzles changes, it is transmitted through the corresponding ventilation pipes, causing the position of the slide in the transparent tube to change, thereby clearly displaying the air pressure changes and controlling the paint dripping phenomenon when cleaning the jet holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the structure of the ox-horn nozzle of the present invention;

[0023] Figure 3 It is a schematic diagram of the internal structure of the ox-horn nozzle of the present invention;

[0024] Figure 4 The present invention Figure 3 The enlarged schematic diagram at A in the middle;

[0025] Figure 5 It is a schematic diagram of the internal structure of the top box of the present invention;

[0026] Figure 6 It is a schematic diagram of the telescopic gas column structure of the present invention;

[0027] Figure 7 The present invention Figure 6 The enlarged schematic diagram of point B in the middle;

[0028] Figure 8 It is a schematic diagram of the transparent tube structure of the present invention;

[0029] Fig. 9 The present invention Figure 8 The enlarged schematic diagram at C in the middle;

[0030] Fig.10 It is a schematic diagram of the telescopic cylinder structure of the present invention.

[0031] In the figure: 11, spray machine arm; 12, machine arm head; 13, spray gun head; 14, bull horn nozzle; 15, bull horn arm; 152, jet hole; 153, side chamber; 16, paint inlet pipe; 17, top box; 171, valve; 172, control line; 173, telescopic air column; 174, piston plate; 175, elastic band; 177, inner tube; 178, expansion plate; 179, negative pressure plate; 18, liquid inlet auxiliary pipe; 2, dredging mechanism; 21, telescopic cylinder; 22, air inlet; 23, sealing plug; 24, telescopic inner column; 25, air vent; 26, air blocking plate; 27, reset rope; 28, cleaning brush; 3, pressure measuring mechanism; 31, transparent cylinder; 32, slide plate; 33, telescopic air bag; 34, expansion film; 35, ventilation pipe; 36, pull line. DETAILED DESCRIPTION

[0032] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0033] like Figure 1 - Fig.10 As shown, an automobile parts processing spraying equipment comprises: a spraying machine arm 11, a machine arm head 12 is provided at the output end of the spraying machine arm 11, a spray gun head 13 is provided at the output end of the machine arm head 12, a bull horn nozzle 14 is installed at the output end of the spray gun head 13, and two bull horn arms 15 are provided on the bull horn nozzle 14. In order to ensure the quality of the parts spraying in the processing of automobile parts, the intelligent spraying machine arm 11 is used for spraying, the spray gun head 13 is correctly installed on the machine arm head 12, and the angle and spraying mode of the bull horn nozzle 14 are adjusted as needed, and then the paint is sprayed from the central nozzle of the bull horn nozzle 14 through the paint inlet pipe 16, and at the same time, the high-pressure gas is sprayed from the gas injection hole 152 in the bull horn arm 15, and the paint is blown and sprayed evenly onto the surface of the automobile parts;

[0034] An air jet hole 152 is provided inside the horn nozzle 14, a side chamber 153 is provided on one side of the horn arm 15 facing the air jet hole 152, and a dredging mechanism 2 for dredging the blocked air jet hole 152 is provided inside the side chamber 153;

[0035] The dredging mechanism 2 includes a telescopic cylinder 21, a cleaning brush 28 is fixedly provided on the outer wall of one end of the telescopic cylinder 21 close to the jet hole 152, and a plurality of air leakage holes 25 are opened on the outer wall of the end of the telescopic cylinder 21 away from the jet hole 152, which are used to control the telescopic cylinder 21 and the cleaning brush 28 to reciprocately poke into the jet hole 152 for clearing the blockage. When the pressure measuring mechanism 3 detects that the air pressure inside the jet hole 152 channel in the two bull horn nozzles 14 changes, it means that the jet hole 152 is blocked at this time. The cleaning brush 28 is inserted into the blocked jet hole 152 by extending the telescopic cylinder 21 to clean up the paint residue, and the jet hole 152 is rubbed back and forth until the jet holes 152 on both sides are ventilated, so as to ensure that the air pressure of the jet holes 152 on both sides is the same, so that the pressure of the spraying liquid is balanced, thereby reducing the situation of uneven spraying;

[0036] The outer wall of the bull horn nozzle 14 is provided with a pressure measuring mechanism 3, which includes a transparent tube 31. Both ends of the transparent tube 31 are provided with ventilation pipes 35 which are respectively interconnected with the air passages of the jet holes 152 in the two bull horn arms 15, and are used to display the air pressure changes inside the air passages of the jet holes 152 in the two bull horn arms 15 in real time. When the air pressure inside the channels of the jet holes 152 in the two bull horn nozzles 14 changes, it is transmitted through the corresponding ventilation pipes 35, causing the slide plate 32 in the transparent tube 31 to change position, thereby clearly displaying the air pressure changes, and also controlling the reduction of paint dripping when cleaning the jet holes 152.

[0037] A slide plate 32 is slidably provided at the inner center position of the transparent tube 31, and the diameter of the slide plate 32 is the same as the inner diameter of the transparent tube 31. Telescopic air bags 33 are fixedly provided on both sides of the slide plate 32. Two pull wires 36 penetrating the transparent tube 31 are provided on the slide plate 32. A control wire 172 penetrating the transparent tube 31 is provided on the slide plate 32 between the two pull wires 36. When the jet hole 152 in the horn arm 15 on one side is blocked by attachments, the airway pressure of the jet hole 152 in the horn arm 15 changes, the incoming air remains unchanged, and the ejected gas decreases, then the airway pressure of the jet hole 152 increases, and the increased air pressure in the airway of the jet hole 152 is transmitted to the space on the side of the expansion film 34 away from the telescopic air bag 33 through the vent pipe 35, thereby achieving the purpose of detecting the change in the airway pressure of the jet holes 152 in the horn arms 15 on both sides, and intuitively showing whether the jets of the jet holes 152 in the horn arms 15 on both sides are the same.

[0038] An expansion film 34 is fixedly provided on one side of the two telescopic airbags 33 away from the slide plate 32. The diameter of the telescopic airbags 33 is smaller than the diameter of the slide plate 32. The space on the side of the expansion film 34 away from the telescopic airbags 33 is not connected to the slide plate 32 and the space where the two telescopic airbags 33 are located. When the jet hole 152 is blocked, a part of the blocked gas is transferred by the vent pipe 35 to the space on the side of the expansion film 34 away from the telescopic airbags 33. The air pressure in this space increases, causing the expansion film 34 to bulge toward one side of the telescopic airbags 33, while the expansion film 34 corresponding to the jet hole 152 on the other side does not change. The bulging of the expansion film 34 on the blocked side pushes the telescopic airbag 33 on the same side to slide, and the slide plate 32 is pushed to slide by the telescopic airbag 33. A pull wire 36 on the same side is pulled by the slide plate 32, so that the pull wire 36 pulls the warping corner of the sealing plug 23 open, and at the same time pulls the control line 172.

[0039] An air blocking disk 26 is slidingly provided inside the telescopic cylinder 21, and a telescopic inner column 24 is fixedly provided on the side of the air blocking disk 26 away from the air jet hole 152, and a plurality of reset ropes 27 are fixedly provided on the air blocking disk 26 outside the telescopic inner column 24, and the telescopic inner column 24 and the air blocking disk 26 are both hollow structures. At the same time, the end of the telescopic inner column 24 away from the air blocking disk 26 is fixedly connected to the side chamber 153. When the pull wire 36 pulls the warp corner of the sealing plug 23 open, air quickly rushes into the telescopic inner column 24, and the telescopic cylinder 21 is pushed into the corresponding air jet hole 152 as the air pressure increases. The cleaning brush 28 is inserted into the blocked air jet hole 152 through the extension of the telescopic cylinder 21 to clean up the paint residue, and the air jet hole 152 is rubbed back and forth until the air jet holes 152 on both sides are circulated, ensuring that the air pressure of the air jet holes 152 on both sides is the same, so that the pressure of the spraying liquid is balanced, thereby reducing the situation of uneven spraying.

[0040] The end of the telescopic inner column 24 away from the air blocking disk 26 is connected to the air inlet 22 fixed in the bull horn nozzle 14 through a pipeline, and a sealing plug 23 is fixedly arranged inside the air inlet 22, and the sealing plug 23 and the air inlet 22 have a corner that is not fixed, and at the same time, the sealing plug 23 and the air inlet 22 are fixedly connected to the pull wire 36 at the corner that is not fixed. When the air blocking disk 26 slides to the position of several air leakage holes 25, it plays a role of rapid air leakage. At the same time, the telescopic cylinder 21 is quickly reset under the pulling force of several reset ropes 27, thereby playing a role of reciprocating telescopic cleaning. The corner of the air inlet 22 that is not fixed to the air inlet 22 seals and blocks the air inlet 22 under its own elastic force, and only when it is pulled by the corresponding pull wire 36, the air intake will be lifted up and the gas will rush into the air inlet 22.

[0041] The nozzle position of the bull horn nozzle 14 is fixedly connected to a paint inlet pipe 16, and a top box 17 is fixedly provided at one end of the paint inlet pipe 16 away from its nozzle. The diameter of the top box 17 is larger than the diameter of the paint inlet pipe 16, and the air inlet end of the top box 17 is connected to a valve 171, and the air inlet end of the valve 171 is connected to the air supply end of the spray gun head 13, and the switch of the valve 171 is connected to the control line 172. When the jet hole 152 is blocked, the spraying robot arm 11 moves the spray gun head 13 to the specified position under intelligent control and stops spraying. At the moment of stopping spraying, the switch of the valve 171 is pulled by the control line 172 to allow high-pressure air to rush into the inner tube 177.

[0042] A liquid inlet auxiliary pipe 18 is fixedly arranged on the side of the paint inlet pipe 16, and the liquid inlet auxiliary pipe 18 is aligned with the paint outlet of the connecting end of the spray gun head 13. The liquid inlet auxiliary pipe 18 and the paint inlet pipe 16 are interconnected and form an H shape. When the bull horn nozzle 14 is installed, the original paint inlet direction is changed by aligning the liquid inlet auxiliary pipe 18 with the paint outlet of the connecting end of the spray gun head 13, which is conducive to quickly blocking the flow of paint.

[0043] A telescopic air column 173 is fixedly installed inside the top box 17, and a piston disk 174 is fixedly connected to one end of the telescopic air column 173 away from the air inlet end of the top box 17. The diameter of the piston disk 174 is the same as the internal diameter of the paint inlet tube 16, and an elastic band 175 is spirally wrapped around the outer wall of the telescopic air column 173.

[0044] An expansion disk 178 is provided inside the piston disk 174, and the air inlet end of the expansion disk 178 is fixedly connected to the inner tube 177, and a plurality of exhaust holes are provided on the outer wall of the inner tube 177 close to the expansion disk 178. At the same time, the air inlet end of the inner tube 177 is connected to the air inlet end of the top box 17. When the gas rushes into the inner tube 177, it enters the telescopic air column 173 through a plurality of exhaust holes provided on the outer wall of the end close to the expansion disk 178, so that the telescopic air column 173 expands and extends from the bottom, pushing the piston disk 174 to slide downward. When the piston disk 174 moves downward over the liquid inlet auxiliary pipe 18, the paint can be blocked from dripping into the paint inlet pipe 16, and when the piston disk 174 slides downward, the elastic band 175 can cause it to generate a torsional force, thereby increasing the scraping effect of the piston disk 174 on the inner wall of the paint inlet pipe 16.

[0045] A negative pressure plate 179 is arranged below the internal expansion plate 178 of the piston plate 174. A plurality of negative pressure holes are opened inside the negative pressure plate 179. The negative pressure plate 179 is higher than the bottom edge of the piston plate 174. The outer wall of the piston plate 174 is provided with stripes. When the telescopic air column 173 expands, air also enters the expansion plate 178 to expand it. When the expansion plate 178 expands, the air in the piston plate 174 is squeezed out. When the telescopic air column 173 is extended to the bottom, the expansion plate 178 is quickly deflated. At the same time as the deflation, negative pressure appears on the piston plate 174, and the paint residue concentrated below the negative pressure plate 179 and the cleaned paint nodes are sucked into the piston plate 174, thereby reducing the blockage of the paint spraying port and reducing the phenomenon of paint dripping when the jet hole 152 is cleaned.

[0046] The above describes an embodiment of the present embodiment, but the present embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, all of which are within the protection of the present embodiment.

Claims

1. A kind of automobile parts processing and spraying equipment, include: A spraying machine arm (11), wherein the output end of the spraying machine arm (11) is provided with a machine arm head (12), the output end of the machine arm head (12) is provided with a spray gun head (13), the output end of the spray gun head (13) is installed with a bull horn nozzle (14), the bull horn nozzle (14) is provided with two bull horn arms (15), and the bull horn nozzle (14) is provided with an air injection hole (152) inside, characterized in that: A side chamber (153) is provided on the side of the horn arm (15) facing the jet hole (152), and a dredging mechanism (2) for dredging the jet hole (152) is provided inside the side chamber (153); The dredging mechanism (2) comprises a telescopic cylinder (21), a cleaning brush (28) is fixedly arranged on the outer wall of one end of the telescopic cylinder (21) close to the jet hole (152), and a plurality of air leakage holes (25) are opened on the outer wall of one end of the telescopic cylinder (21) away from the jet hole (152) for controlling the telescopic cylinder (21) and the cleaning brush (28) to reciprocate and poke into the jet hole (152) to clear the blockage; The outer wall of the bullhorn nozzle (14) is provided with a pressure measuring mechanism (3), and the pressure measuring mechanism (3) comprises a transparent tube (31), and both ends of the transparent tube (31) are provided with ventilation pipes (35) respectively interconnected with the air passages of the air jet holes (152) in the two bullhorn arms (15), and used for displaying the air pressure changes inside the air passages of the air jet holes (152) in the two bullhorn arms (15) in real time; A slide plate (32) is slidably arranged at the inner center of the transparent tube (31), and the diameter of the slide plate (32) is the same as the inner diameter of the transparent tube (31). Telescopic air bags (33) are fixedly arranged on both sides of the slide plate (32). Two pull wires (36) penetrating the transparent tube (31) are arranged on the slide plate (32), and a control wire (172) penetrating the transparent tube (31) is arranged on the slide plate (32) between the two pull wires (36); An expansion film (34) is fixedly arranged on one side of the two telescopic airbags (33) away from the slide plate (32); the diameter of the telescopic airbags (33) is smaller than the diameter of the slide plate (32); and the space on the side of the expansion film (34) away from the telescopic airbags (33) is not connected to the slide plate (32) and the space where the two telescopic airbags (33) are located; An air blocking disk (26) is slidably arranged inside the telescopic cylinder (21), and a telescopic inner column (24) is fixedly arranged on the side of the air blocking disk (26) away from the air injection hole (152). A plurality of reset ropes (27) are fixedly arranged on the air blocking disk (26) outside the telescopic inner column (24), and the telescopic inner column (24) and the air blocking disk (26) are both hollow structures. At the same time, one end of the telescopic inner column (24) away from the air blocking disk (26) is fixedly connected to the side chamber (153).

2. The automotive parts processing and spraying equipment according to claim 1, It is characterized in that The end of the telescopic inner column (24) away from the air blocking plate (26) is connected to an air inlet (22) fixed in the bull-horn nozzle (14) through a pipeline, and a sealing plug (23) is fixedly arranged inside the air inlet (22), and the sealing plug (23) and the air inlet (22) have a corner that is not fixed, and at the same time, the sealing plug (23) and the air inlet (22) are fixedly connected to the pull wire (36) at the corner that is not fixed.

3. The automotive parts processing spraying equipment according to claim 1, It is characterized in that The nozzle position of the bull horn nozzle (14) is fixedly connected to a paint inlet pipe (16); a top box (17) is fixedly provided at one end of the paint inlet pipe (16) away from the nozzle; the diameter of the top box (17) is larger than the diameter of the paint inlet pipe (16); the air inlet end of the top box (17) is connected to a valve (171); the air inlet end of the valve (171) is connected to the air supply end of the spray gun head (13); and the switch of the valve (171) is connected to a control line (172).

4. The automotive parts processing spraying equipment according to claim 3, It is characterized in that A liquid inlet auxiliary pipe (18) is fixedly arranged on the side of the paint inlet pipe (16), and the liquid inlet auxiliary pipe (18) is aligned with the paint outlet of the connection end of the spray gun head (13), and the liquid inlet auxiliary pipe (18) and the paint inlet pipe (16) are interconnected and form an H shape.

5. The automotive parts processing spraying equipment according to claim 4, It is characterized in that A telescopic air column (173) is fixedly arranged inside the top box (17); one end of the telescopic air column (173) away from the air inlet end of the top box (17) is fixedly connected to a piston disk (174); the diameter of the piston disk (174) is the same as the internal diameter of the paint inlet pipe (16); and an elastic band (175) is spirally wound around the outer wall of the telescopic air column (173).

6. The automotive parts processing spraying equipment according to claim 5, It is characterized in that An expansion disk (178) is arranged inside the piston disk (174), and an air inlet end of the expansion disk (178) is fixedly connected to an inner tube (177), and an outer wall of one end of the inner tube (177) close to the expansion disk (178) is provided with a plurality of exhaust holes, and the air inlet end of the inner tube (177) is connected to the air inlet end of the top box (17).

7. The automotive parts processing spraying equipment according to claim 6, It is characterized in that A negative pressure plate (179) is arranged below the internal expansion plate (178) of the piston plate (174), and a plurality of negative pressure holes are opened inside the negative pressure plate (179). The negative pressure plate (179) is higher than the bottom edge of the piston plate (174), and the outer wall of the piston plate (174) is provided with stripes.

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