Device and method for testing after assembly of spray gun of automobile body painting machine

Abstract

The present invention relates to a device and method for testing the spray gun of an automobile body painting machine after it is assembled, and belongs to the field of automatic detection devices. The NTC-type spray gun mounting base is fixed to the left side of the crossbeam of the frame by a clamping device, and the capsule-type spray gun mounting base is fixed to the right side of the crossbeam of the frame by a clamping device. The back cleaning detection component is placed in the basket of the frame, the tank extrusion liquid DCL detection component is clamped with the placement platform of the frame, and the ejector valve sealing detection component is clamped with the bracket of the frame. The advantage is that the structure is novel. After the spray gun is assembled, compressed air is used to simulate the on-site working environment to detect the integrity and sealing of the spray gun, which can not only improve the success rate of the spray gun assembly, but also save ineffective labor and avoid waste of materials. The one-stop integrated detection of the present invention can quickly and effectively detect the assembled spray gun, save time and labor, and has the characteristics of precise structure and low maintenance cost.

Description

Technical Field

[0001] The present invention relates to the field of automatic detection devices, and in particular to a device and method for detecting a spray gun of an automobile body coating machine after assembly is completed. Background Art

[0002] The spray gun of the automobile body painting machine is an important component of the spraying machine. It adopts the voltage block method to directly apply high voltage to the coating machine, and uses the high-speed rotary cup to rotate and atomize the ejected paint to spray the car body.

[0003] Today, as automobile products become more and more popular and people's quality of life improves, not only are the requirements for automobile performance getting higher and higher, but the aesthetic experience of its appearance is also increasing. The painting process of automobile bodies is also constantly improving and improving. In the body painting process, the coating machine spray gun obviously plays an irreplaceable role. This requires that after the disassembly, maintenance and assembly of the coating machine spray gun are completed, the stability and reliability of on-site spraying must be guaranteed to prevent poor spraying from causing irreversible effects on the car paint process.

[0004] After the coating machine spray gun is assembled, the various functional tests of the product require one-stop integration. This requires the testing equipment to move towards an integrated, standardized, and simplified parallel testing structure, so as to achieve high efficiency and low cost in the testing of the coating machine spray gun.

[0005] Currently, there are two main types of paint spray guns in use: 1. The CB1 capsule-type rotary cup spray gun for the midcoat and primer layers, and 2. The NTC high-adhesion rotary cup spray gun for the clearcoat layer. Because paint spray guns are exposed to paint for extended periods, contamination can occur. Furthermore, multiple internal mechanisms utilize resin seals, which can aging, expand, and other seal defects. Therefore, paint spray guns require regular disassembly and maintenance to ensure high-quality paint finishes on vehicle bodies. However, after regular maintenance, the lack of testing equipment to perform internal pipe cleaning and seal testing on the assembled guns, including testing for leaks in the liquid tank DCL line and the spray gun's ejector valve, leads to a certain probability of leaks when poorly assembled guns are used directly in the shop's paint shop, resulting in serious consequences such as poor vehicle quality. Summary of the Invention

[0006] The present invention provides a device and method for detecting a spray gun of an automobile body coating machine after assembly is completed, so as to solve the problem that there is currently no systematic device for detecting the spray gun of a coating machine after assembly is completed.

[0007] The technical solution adopted by the present invention is: it includes an NTC type spray gun mounting base, a capsule type spray gun mounting base, a back cleaning detection assembly, a tank extrusion liquid DCL detection assembly, a needle valve sealing detection assembly and a frame, wherein the NTC type spray gun mounting base is fixed to the left side of the crossbeam of the frame by a clamping device, and the capsule type spray gun mounting base is fixed to the right side of the crossbeam of the frame by a clamping device. The back cleaning detection assembly is placed in the basket of the frame and is used to detect the sealing state of the cleaning liquid check valve of the back cleaning unit of the spray gun. The material tank extrusion liquid DCL detection assembly is clamped with the material tank extrusion liquid DCL detection assembly placement platform of the frame to detect the sealing state of the one-way guide valve of the pressure pin seat of the spray gun. The needle valve sealing detection assembly is clamped with the needle valve sealing detection assembly bracket of the frame to detect the opening and closing sealing state of the paint spray needle valve of the spray gun.

[0008] The back cleaning detection assembly includes a pin, a cleaning liquid tube, a strap, a tracheal hose, an air valve, a spring, a compression plate, a front panel, a main body, and a back panel, wherein the two pins and the outlet end of the cleaning liquid tube are fixedly connected to the front panel, the front panel is slidably connected to the main body, four springs are located between the front panel and the back panel, the back panel is fixedly connected to the main body, the air valve is fixedly connected to the rear end of the cleaning liquid tube, the tracheal hose is fixedly connected to the air valve, and the two ends of the strap are fixedly connected to the back panel through compression plates.

[0009] The tank extrudate DCL detection assembly includes a three-way joint, a valve, a pipeline pressure relief device, a pipeline, a pressure gauge, and a housing, wherein the lower end of the housing is fixedly connected to the valve, the pressure gauge is fixedly connected to the top of the housing, the three-way joint is located inside the housing, and the two ends are respectively connected to the pressure gauge and the valve through pipelines, and the third end is connected to the pipeline pressure relief device located in the housing.

[0010] The ejector valve sealing detection assembly includes a housing, a spring, a caliper, an air pipe, a tee and a valve, wherein the caliper is fixedly connected to the lower part of the housing, the air pipe is connected to the valve via the tee, and the spring is located in the valve.

[0011] A method for testing a spray gun of an automobile body coating machine after assembly is completed, comprising the following steps:

[0012] (1) The specific testing process of the back cleaning detection component is as follows:

[0013] Manually install the assembled spray gun on the threaded fastening part of the NTC type spray gun mounting base or the capsule type spray gun mounting base on the rack, rotate the manual threaded sleeve clockwise to tighten it, take out the back cleaning detection component from the basket of the rack, and move it to the fixed spray gun. At this time, the two needle bodies of the ejector pin of the back cleaning component need to be embedded in the fixed port of the spray gun cleaning unit to fix the position, and then push the body to tighten and fix it. At this time, under the action of four springs, the front panel can have a tightening function that can be telescoped back and forth to ensure that the outlet end of the cleaning liquid pipe and the back cleaning check valve of the spray gun are in a good sealing state. At this time, the adjustable The strap is used to fasten the main body and the spray gun body. After the strap is wrapped around the spray gun body, it is properly tightened and adjusted so that the main body can be tightly fixed on the spray gun body. When the control command is received, the existing air source starts to simulate the cleaning liquid to work, and the compressed air enters the air valve through the air pipe hose and passes through the outlet end of the cleaning liquid pipe. When the back cleaning detection component is completely and tightly combined with the spray gun body, the back cleaning unit check valve of the spray gun conducts air, the check valve opens, and the simulated cleaning liquid cleans the internal pipeline of the spray gun. At this time, it should be confirmed whether the outlet end of the cleaning liquid pipe of the back cleaning detection component and the check valve of the cleaning unit of the spray gun are in a sealed state.

[0014] (2) The specific testing process of the tank extrusion liquid DCL detection component is as follows:

[0015] When it is necessary to test the sealing performance of the one-way valve of the pressure pin seat at the top of the spray gun, the assembled spray gun is manually installed on the threaded fastening of the NTC type spray gun mounting base or the capsule type spray gun mounting base on the frame, and the threaded sleeve is manually tightened. The DCL detection assembly of the material tank extruded liquid is manually removed from the placement platform and closed with the guide rail of the spray gun to be tested. After the spray gun receives the control signal, the internal air path at the spray gun pressure pin seat is opened. At this time, the ejector pin at the valve opens, and the gas enters the pipeline through the three-way joint, and the pressure value at this moment is displayed on the pressure gauge. At this time, the spray gun pressure pin seat valve and the valve should be tightly closed and no air leakage occurs. A one-way valve is set inside the valve. After the spray gun air source is turned off, in order to buffer and offset the impact of the internal pressure of the pipeline on the valve, a pipeline pressure relief device is set. When the spray gun air source is turned off, the internal pressure of the DCL detection assembly discharges the residual pressure through the pipeline pressure relief device with a silencer;

[0016] (3) The inspection process of the ejector valve inspection component is as follows:

[0017] Detection of the open and closed status of the ejector valve of the spray gun: manually install the assembled spray gun on the threaded fastening of the NTC type spray gun mounting base or the capsule type spray gun mounting base on the frame, and manually tighten the threaded sleeve. Manually remove the ejector valve detection assembly from the ejector valve detection assembly bracket of the frame, and install it on the pull-out guide rail of the spray gun to be inspected. Insert and fix each other, and align the 0 scale of the caliper with the top of the spray gun without any gap. Then, the spray gun to be inspected receives the control instruction, the air pipe passage, and the air source enters the valve through the tee. Under the pressure of the air source, the valve drives the internal spring to work downward, so that the ejector valve of the spray gun opens, and the spray gun performs the air spraying operation. It should be noted that during the operation of this step, the on-site painting operation of the spray gun is simulated as the air spraying operation, so the nozzle of the spray gun needs to be blocked to confirm the sealing status of the valve.

[0018] The advantage of the present invention is its novel structure. After the spray gun is assembled, compressed air is used to simulate the on-site working environment to detect the integrity and sealing of the spray gun. This not only improves the success rate of the spray gun assembly, but also saves ineffective labor and avoids waste of materials. The one-stop integrated detection of the present invention can quickly and effectively detect the assembled spray gun, saving time and labor, and has the characteristics of precise structure and low maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 It is a structural schematic diagram of the NTC type spray gun mounting base of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the capsule spray gun mounting base of the present invention;

[0022] Figure 4 It is a schematic structural diagram of the back cleaning detection assembly of the present invention;

[0023] Figure 5 It is a rear view assembly diagram of the back cleaning detection component of the present invention;

[0024] Figure 6 2. It is a schematic structural diagram of the DCL detection assembly of the material tank extrudate of the present invention;

[0025] Figure 7 It is a structural schematic diagram of the ejector valve sealing detection assembly of the present invention;

[0026] Figure 8 It is a cross-sectional view of the ejector valve sealing detection assembly of the present invention. DETAILED DESCRIPTION

[0027] The technical solution will be fully and clearly explained below in conjunction with the accompanying drawings. Obviously, the embodiments explained below are only part of the embodiments of the present invention, rather than all the embodiments of the invention. On this basis, basic improvements to the present invention without creatively changing the detection device all fall within the scope of protection of the present invention.

[0028] It should be pointed out that, in the explanation of the present invention, the directional indication mentioned can only represent the explanation of the specific position of the components in a specific posture. If the directional indication changes, the positional relationship of the components will also change accordingly.

[0029] See also Figures 1 to 3 , including an NTC-type spray gun mounting base 1, a capsule-type spray gun mounting base 2, a back cleaning detection component 3, a tank extruded liquid DCL detection component 4, a needle valve sealing detection component 5 and a frame 6, wherein the NTC-type spray gun mounting base 1 is fixed to the left side of the crossbeam of the frame 6 by a clamping device 601, and the capsule-type spray gun mounting base 2 is fixed to the right side of the crossbeam of the frame 6 by a clamping device 602. The back cleaning detection component 3 is placed in a basket 603 of the frame 6, and is used to detect the sealing state of the cleaning liquid check valve of the back cleaning unit of the spray gun. The material tank extruded liquid DCL detection component 4 is clamped with the material tank extruded liquid DCL detection component placement platform 604 of the frame 6, and is used to detect the sealing state of the one-way guide valve of the pressure pin seat of the spray gun. The needle valve sealing detection component 5 is clamped with the needle valve sealing detection component bracket 605 of the frame 6, and is used to detect the opening and closing sealing state of the paint spraying needle valve of the spray gun.

[0030] See also Figure 4 and Figure 5 The back cleaning detection component 3 includes a pin 301, a cleaning liquid tube 302, a strap 303, a tracheal hose 304, an air valve 305, a spring 306, a compression piece 307, a front panel 308, a main body 309, and a back panel 310, wherein the two pins 301 and the outlet end of the cleaning liquid tube 302 are fixedly connected to the front panel 308, the front panel 308 is slidingly connected to the main body 309, four springs 306 are located between the front panel 308 and the back panel 310, the back panel 310 is fixedly connected to the main body 309, the air valve 305 is fixedly connected to the rear end of the cleaning liquid tube 302, the tracheal hose 304 is fixedly connected to the air valve 305, and the two ends of the strap 303 are fixedly connected to the back panel 310 through compression pieces 307.

[0031] See also Figure 6The tank extrudate DCL detection assembly 4 includes a three-way connector 401, a valve 402, a pipeline pressure relief device 403, a pipeline 404, a pressure gauge 405, and a housing 406. The lower end of the housing 406 is fixedly connected to the valve 402, and the pressure gauge 405 is fixedly connected to the top of the housing 406. The three-way connector 401 is located in the housing 406, and its two ends are respectively connected to the pressure gauge 405 and the valve 402 through the pipeline 404, and the third end is connected to the pipeline pressure relief device 403 located in the housing.

[0032] See also Figures 7-8 The ejector valve sealing detection component 5 includes a housing 501, a spring 502, a caliper 503, an air pipe 504, a tee 505 and a valve 506, wherein the caliper 503 is fixedly connected to the lower part of the housing 501, the air pipe 504 is connected to the valve 506 via the tee 505, and the spring 502 is located in the valve 506.

[0033] A method for testing a spray gun of an automobile body coating machine after assembly is completed, comprising the following steps:

[0034] (1) The specific detection process of the back cleaning detection component 3 is as follows:

[0035] Currently, after a spray gun has been used to paint a vehicle body on site, since the paint color of each vehicle is random, it is necessary to clean the internal paint pipeline of the spray gun before the next vehicle body is sprayed to avoid contamination of the vehicle body by different pigments.

[0036] Manually install the assembled spray gun on the NTC type spray gun mounting base 1 or the capsule type spray gun mounting base 2 on the frame 6 at the base threaded fastening place, manually rotate the threaded sleeve clockwise to tighten, take out the back cleaning detection component 3 from the basket 603 of the frame 6, and move it to the fixed spray gun. At this time, the two needle bodies of the ejector pin 301 of the back cleaning component 3 need to be embedded in the fixed port of the spray gun cleaning unit to fix the position, and then push the main body 309 to press and fix it. At this time, under the action of the four springs 306, the front panel 308 can have a tightening function that can be telescoped back and forth to ensure that the outlet end of the cleaning liquid pipe 302 and the back cleaning check valve of the spray gun are in a good sealing state. At this time, the adjustable The strap 303 is used to fasten the main body 309 and the spray gun body. After the strap 303 is wrapped around the spray gun body, it is properly tightened and adjusted so that the main body 309 can be tightly fixed on the spray gun body. When the control command is received, the existing air source starts to simulate the cleaning liquid to work, and the compressed air enters the air valve 305 through the air pipe hose 304 and passes through the outlet end of the cleaning liquid pipe 302. When the back cleaning detection component is completely and tightly combined with the spray gun body, the back cleaning unit check valve of the spray gun conducts air, the check valve opens, and the simulated cleaning liquid cleans the internal pipeline of the spray gun. At this time, it should be confirmed whether the outlet end of the cleaning liquid pipe 302 of the back cleaning detection component and the check valve of the cleaning unit of the spray gun are in a sealed state.

[0037] (2) The specific detection process of the tank extrudate DCL detection component 4 is as follows:

[0038] Currently, when a spray gun is performing a paint spraying operation, the interior of a material tank is filled with extrusion liquid DCL, thereby squeezing the paint bag to achieve the paint spraying operation of the spray gun.

[0039] When it is necessary to detect the sealing performance of the one-way valve of the pressure pin seat at the top of the spray gun, the assembled spray gun is manually mounted on the NTC type spray gun mounting base 1 or the capsule type spray gun mounting base 2 on the frame 6, and the threaded sleeve is tightened manually. The tank extruded liquid DCL detection component 4 is manually removed from the placement platform 604 and closed with the guide rail of the spray gun to be tested. After the spray gun receives the control signal, the internal gas path at the pressure pin seat of the spray gun is opened. At this time, the ejector pin at the valve 402 is opened, and the gas passes through the three Connector 401 enters pipeline 404, and the pressure value at that moment is displayed on pressure gauge 405. At this time, the spray gun pressure pin seat valve and valve 402 should be tightly closed and there should be no air leakage. A one-way guide valve is set inside valve 402. After the spray gun air source is turned off, a pipeline pressure relief device 403 is set to buffer and offset the impact force of the internal pipeline pressure on the valve. When the spray gun air source is turned off, the internal pressure of the DCL detection component is discharged through the pipeline pressure relief device 403 with a silencer.

[0040] (3) The detection process of the ejector valve detection component 5 is as follows:

[0041] Currently, when a spray gun is used for painting, it is required that the spraying of the spray gun can be controlled by opening and closing a needle valve.

[0042] Detection of the open and closed status of the ejector valve of the spray gun: Manually install the assembled spray gun on the threaded fastening of the NTC type spray gun mounting base 1 or the capsule type spray gun mounting base 2 on the frame 6, and manually tighten the threaded sleeve. Manually remove the ejector valve detection assembly 5 from the ejector valve detection assembly bracket 605 of the frame 6 and install it on the pull-out guide rail of the spray gun to be inspected. Insert and fix each other, and align the 0 scale of the caliper 503 with the top of the spray gun to ensure no gap. Then, the spray gun to be inspected receives the control command, the air pipe 504 is opened, and the air source enters the valve 506 through the tee 505. Under the pressure of the air source, the valve 506 drives the internal spring downward to work, causing the ejector valve of the spray gun to open, and the spray gun to spray air. It should be noted that during the operation of this step, the on-site painting operation of the spray gun is simulated as an air spraying operation, so the nozzle of the spray gun needs to be blocked to confirm the sealing status of the valve 506.

[0043] The above descriptions are only some preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made under the concept of the present invention using the contents of the present invention specification and drawings, without changing the basic detection method of the present invention, or directly / indirectly used in other related technical fields and detection fields, are included in the patent protection scope of the present invention.

Claims

1. A device for testing the spray gun of an automobile body coating machine after assembly, characterized in that: It includes an NTC-type spray gun mounting base, a capsule-type spray gun mounting base, a back cleaning detection component, a tank extrusion liquid DCL detection component, a needle valve sealing detection component and a frame, wherein the NTC-type spray gun mounting base is fixed to the left side of the crossbeam of the frame by a clamping device, and the capsule-type spray gun mounting base is fixed to the right side of the crossbeam of the frame by a clamping device. The back cleaning detection component is placed in the basket of the frame and is used to detect the sealing state of the cleaning liquid check valve of the back cleaning unit of the spray gun. The tank extrusion liquid DCL detection component is clamped with the tank extrusion liquid DCL detection component placement platform of the frame and is used to detect the sealing state of the one-way guide valve of the pressure pin seat of the spray gun. The needle valve sealing detection component is clamped with the needle valve sealing detection component bracket of the frame and is used to detect the opening and closing sealing state of the paint spray needle valve of the spray gun.

2. The device for testing the spray gun of an automobile body coating machine after assembly according to claim 1, characterized in that: The back cleaning detection assembly includes a pin, a cleaning liquid tube, a strap, a tracheal hose, an air valve, a spring, a compression plate, a front panel, a main body, and a back panel, wherein the two pins and the outlet end of the cleaning liquid tube are fixedly connected to the front panel, the front panel is slidably connected to the main body, four springs are located between the front panel and the back panel, the back panel is fixedly connected to the main body, the air valve is fixedly connected to the rear end of the cleaning liquid tube, the tracheal hose is fixedly connected to the air valve, and the two ends of the strap are fixedly connected to the back panel through compression plates.

3. The device for testing the spray gun of an automobile body coating machine after assembly according to claim 1, characterized in that: The tank extrudate DCL detection assembly includes a three-way joint, a valve, a pipeline pressure relief device, a pipeline, a pressure gauge, and a housing, wherein the lower end of the housing is fixedly connected to the valve, the pressure gauge is fixedly connected to the top of the housing, the three-way joint is located inside the housing, and the two ends are respectively connected to the pressure gauge and the valve through pipelines, and the third end is connected to the pipeline pressure relief device located in the housing.

4. The device for testing the spray gun of an automobile body coating machine after assembly according to claim 1, characterized in that: The ejector valve sealing detection assembly includes a housing, a spring, a caliper, an air pipe, a tee and a valve, wherein the caliper is fixedly connected to the lower part of the housing, the air pipe is connected to the valve via the tee, and the spring is located in the valve.

5. The device for testing the spray gun of an automobile body coating machine after assembly is completed according to claim 1, characterized in that The method for testing the automobile body painting machine spray gun after assembly is completed includes the following steps: (1) The specific testing process of the back cleaning detection component is as follows: manually install the assembled spray gun on the NTC type spray gun mounting base or the capsule spray gun mounting base on the frame at the threaded fastening position, manually rotate the threaded sleeve clockwise to tighten, take out the back cleaning detection component from the basket of the frame, and move it to the fixed spray gun. At this time, the two needle bodies of the ejector pin of the back cleaning detection component need to be embedded in the fixed port of the spray gun cleaning unit to fix the position, and then push the main body to be pressed and fixed. At this time, under the action of four springs, the front panel has a pressing function that can be extended and retracted back and forth to ensure that the outlet end of the cleaning liquid pipe and the back cleaning check valve of the spray gun are well sealed. State, at this time, use the adjustable strap to fasten the body and the spray gun body, wrap the strap around the spray gun body and perform appropriate tightening adjustment so that the body can be tightly fixed on the spray gun body. When the control command is received, the existing air source starts to simulate the cleaning liquid to work, and the compressed air enters the air valve through the air pipe hose and passes through the outlet end of the cleaning liquid pipe. When the back cleaning detection component is completely and tightly combined with the spray gun body, the back cleaning unit check valve of the spray gun conducts air, the check valve opens, and the simulated cleaning liquid cleans the internal pipeline of the spray gun. At this time, you should confirm whether the outlet end of the cleaning liquid pipe of the back cleaning detection component and the check valve of the cleaning unit of the spray gun are in a sealed state. (2) The specific testing process of the tank extrusion liquid DCL detection component is as follows: When it is necessary to test the sealing performance of the one-way valve of the pressure pin seat at the top of the spray gun, the assembled spray gun is manually installed on the threaded fastening of the NTC type spray gun mounting base or the capsule type spray gun mounting base on the frame, and the threaded sleeve is manually tightened. The DCL detection assembly of the material tank extruded liquid is manually removed from the placement platform and closed with the guide rail of the spray gun to be tested. After the spray gun receives the control signal, the internal air path at the spray gun pressure pin seat is opened. At this time, the ejector pin at the spray gun pressure pin seat valve opens, and the gas enters the pipeline through the three-way joint, and the pressure value at this moment is displayed on the pressure gauge. At this time, the spray gun pressure pin seat valve and the valve should be tightly closed and no air leakage occurs. A one-way valve is provided inside the spray gun pressure pin seat valve. After the spray gun air source is turned off, a pipeline pressure relief device is provided to buffer and offset the impact of the internal pressure of the pipeline on the valve. When the spray gun air source is turned off, the internal pressure of the DCL detection assembly is discharged through the pipeline pressure relief device with a silencer. The residual pressure; (3) The inspection process of the ejector valve sealing detection component is as follows: Inspection of the opening and closing status of the ejector valve of the spray gun: manually install the assembled spray gun on the NTC type spray gun mounting base or the capsule type spray gun mounting base on the frame at the threaded fastening position, and manually tighten the threaded sleeve. Manually remove the ejector valve sealing detection component from the ejector valve sealing detection component bracket of the frame, and install it on the pull-out guide rail of the spray gun to be inspected, insert and fix each other, and align the 0 scale of the caliper with the top of the spray gun without any gap. Then, the spray gun to be inspected receives the control instruction, the air pipe passage, and the air source enters the valve through the tee. Under the pressure of the air source, the valve drives the internal spring to work downward, so that the ejector valve of the spray gun opens, and the spray gun performs the air spraying operation. It should be noted that during the operation of this step, the on-site painting operation of the spray gun is simulated as the air spraying operation, so the nozzle of the spray gun needs to be blocked to confirm the sealing status of the valve.

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