A positioning and spraying system and a spraying method for a workpiece

Abstract

The present application relates to a kind of positioning and spraying system and spraying method of workpiece, belong to automatic spraying technical field, solve the low efficiency of existing technology in spraying system, the problem of high cost.This application provides a kind of positioning and spraying system of workpiece, including spraying unit and fixed component, the fixed component is used for the fixation of transfer trolley, the spraying unit is used to the workpiece to be sprayed on the transfer trolley is sprayed.This application can be quickly realized under manual operation transfer trolley fixation and guiding locking, improve the positioning accuracy of car body and the work efficiency of product spraying preparation process;The present application shortens the pipeline of spraying system, reduces the residual amount in pipeline, saves raw material cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic spraying, in particular to a positioning and spraying system for workpieces and a spraying method. BACKGROUND

[0002] In the aviation manufacturing industry, the surface coating of an aircraft can effectively prevent the corrosion of aircraft parts and improve the operational stability and reliability of the aircraft. In the military field, the coating of an aircraft must also have a stealth function. Stealth fighter aircraft require the coating to effectively absorb the emitted waves of various radars when cruising at high subsonic speed or even supersonic speed. This puts extremely high requirements on the thickness, uniformity and stealth performance of the coating. Compared with manual operation, robot spraying is more stable, efficient and uniform, and has higher coating quality. Therefore, automatic coating is an important direction for the development of China's aviation manufacturing industry.

[0003] However, due to the complex structure of aerospace products and the complex spraying trajectory, high requirements are placed on the flexibility of production of robots. On the other hand, due to the high cost of the coating on the surface of the product, in the face of small-batch production requirements or non-continuous coating production requirements, traditional automatic spraying robots have the problems of long production preparation time, large coating loss, high use cost and the like due to their large size and long supply pipeline. At the same time, fixed multi-degree-of-freedom spraying robots must ensure that the workpiece is fixed in position during spraying, and various tooling aids are required to successfully automatically spray. The traditional spraying method is to manually control the mechanical fixing device to lock the workpiece support tooling, or to install the workpiece to a fixed point. The traditional spraying method has a long workpiece installation time and may not be accurately positioned. SUMMARY

[0004] In view of the above analysis, the embodiments of the present application aim to provide a positioning and spraying system for workpieces and a spraying method to solve the problems of low work efficiency and high cost of the existing spraying system.

[0005] In one aspect, the present application provides a positioning and spraying system for workpieces, comprising a spraying unit and a fixing assembly, the fixing assembly is used for fixing a transfer trolley, and the spraying unit is used for spraying a workpiece to be sprayed on the transfer trolley.

[0006] Further, the spraying unit comprises a supply assembly, a spraying assembly and a control assembly, the supply assembly is used for providing coating required for spraying operation, the spraying assembly is used for completing automatic spraying operation, and the control assembly is used for controlling the spraying system.

[0007] Further, the spraying unit further comprises a support assembly, the support assembly comprises an adjusting bottom plate, a robot base and an outer shell, the lower end of the robot base is connected with the adjusting bottom plate, and the outer shell is arranged outside the robot base.

[0008] Further, a maintenance door is arranged on the shell.

[0009] Further, the spraying assembly comprises a spraying robot and an automatic spraying gun, one end of the spraying robot is arranged on the top of the robot base, and the other end is provided with the automatic spraying gun.

[0010] Further, the control assembly comprises a control unit, which is connected with the robot base and corresponds to the maintenance door.

[0011] Further, the fixing assembly comprises a fixing support and a control box.

[0012] Further, the fixing support comprises a double leveling base, a connecting column and a connecting plate connected in sequence.

[0013] Further, the fixing assembly further comprises a guide block clamped with the transfer trolley.

[0014] On the other hand, the present application provides a positioning spraying method for workpieces, based on the positioning spraying system described above, comprising the following steps:

[0015] Step S1: limiting the movement of the transfer trolley on which the workpiece to be sprayed is placed through the guide block;

[0016] Step S2: starting the start button in the control box to make the spinning cylinder drive the spinning arm to act and automatically lock the transfer trolley;

[0017] Step S3: adding paint to the feeding assembly to start automatic spraying operation;

[0018] Step S4: after spraying is completed, the start button is turned off to release the transfer trolley, the transfer trolley is pushed out of the spraying work area, and steps S1-S4 are repeated to spray the next workpiece to be sprayed;

[0019] Step S5: after completing the spraying operation of all workpieces to be sprayed, the pressure tank and the automatic spraying gun are cleaned.

[0020] Compared with the prior art, the present application can at least achieve one of the following beneficial effects:

[0021] (1) The fixing assembly of the present application comprises a solenoid valve and a rotary cylinder, which can quickly realize the fixation and guide locking of the transfer trolley under manual operation, improve the positioning accuracy of the trolley body, better cooperate with the spraying robot to complete the automatic spraying operation, reduce manual operation, and improve the work efficiency of the product spraying preparation process.

[0022] (2) The present application shortens the distance between the feeding unit and the spraying robot, shortens the pipeline of the spraying system, reduces the residual amount in the pipeline, can save paint, and saves the raw material cost of the spraying operation preparation process in automatic production.

[0023] (3) The space utilization rate is high, the distributed installation of the electric control element and the pneumatic control element is realized, the production preparation time is shortened, the volume of the spraying unit is reduced, the spraying unit can be used in a small-area coating work area, and the small-batch production demand or the non-continuous coating production demand is met.

[0024] (4) The automatic spraying gun switch is controlled in a parallel mode of the manual switch and the electromagnetic valve, the button is switched to the manual mode when the coating is manually prepared and checked, whether the parameters such as the spraying atomization degree and the fan width of the spraying gun meet the spraying requirements is checked before the automatic spraying, the spraying robot does not move when the execution program is clicked at this time, and the risk caused by the personnel misoperation is prevented; the button is switched to the automatic mode under the premise that the conditions meet the automatic spraying requirements, the automatic spraying gun is controlled by using the electromagnetic valve, the equipment is started, and the spraying robot can realize the automatic spraying operation.

[0025] (5) After the product to be coated is placed and fixed on the transfer trolley, the movement direction of the trolley body is limited through the guide block, the transfer trolley is locked or released with the fixed support through the electromagnetic valve control rotary cylinder and rotary arm, accurate positioning of the transfer trolley is realized, the positioning accuracy requirement of the workpiece for the automatic robot spraying operation is met, quick transfer after the workpiece spraying operation is finished is realized, and the problems of difficult manual mechanical positioning and long time consumption of the traditional transfer trolley are solved.

[0026] In the present application, the above technical solutions can be combined with each other to realize more preferred combination solutions. Other features and advantages of the present application will be described in the subsequent specification, and some advantages will become apparent from the specification or be understood by implementing the present application. The purposes and other advantages of the present application can be realized and obtained from the contents specifically pointed out in the specification and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. In the drawings:

[0028] Figure 1 FIG. 1 is a structural schematic view of a spraying unit according to an embodiment of the present application;

[0029] Figure 2 FIG. 3 is a structural schematic view of a spraying unit according to an embodiment of the present application; Figure 1 FIG. 4 is an enlarged schematic view of part B in FIG. 3;

[0030] Figure 3 FIG. 5 is a structural schematic view of a spraying unit without a shell according to an embodiment of the present application;

[0031] Figure 4 FIG. 7 is a structural schematic view of a spraying unit according to an embodiment of the present application; Figure 3 FIG. 8 is an enlarged schematic view of part D in FIG. 7; FIG. 9 is a structural schematic view of a spraying unit according to an embodiment of the present application;

[0032] Figure 5 A portion of the disclosure of this patent document contains material which is subject to copyright protection. This copyright protection Figure 1 A portion of the disclosure of this patent document contains material which is subject to copyright protection. This copyright protection

[0033] Figure 6 A portion of the disclosure of this patent document contains material which is subject to copyright protection. This copyright protection Figure 3 A portion of the disclosure of this patent document contains material which is subject to copyright protection. This copyright protection

[0034] Figure 7 A portion of the disclosure of this patent document contains material which is subject to copyright protection. This copyright protection Figure 5 A portion of the disclosure of this patent document contains material which is subject to copyright protection. This copyright protection

[0035] Figure 8 A portion of the disclosure of this patent document contains material which is subject to copyright protection. This copyright protection Figure 6 A portion of the disclosure of this patent document contains material which is subject to copyright protection. This copyright protection

[0036] Figure 9 A portion of the disclosure of this patent document contains material which is subject to copyright protection. This copyright protection

[0037] Figure 10 A portion of the disclosure of this patent document contains material which is subject to copyright protection. This copyright protection

[0038] Figure 11 A portion of the disclosure of this patent document contains material which is subject to copyright protection. This copyright protection Figure 10 A portion of the disclosure of this patent document contains material which is subject to copyright protection. This copyright protection

[0039] Reference Signs:

[0040] 1-spraying unit; 11-support assembly; 111-adjusting base plate; 112-robot base; 113-outer shell; 114-maintenance door; 115-mounting seat; 12-feeding assembly; 121-pressure tank; 122-agitator; 123-pressure regulating valve; 124-discharge port; 13-spraying assembly; 131-spraying robot; 132-automatic spray gun; 141-manual switch; 142-control unit; 2-fixing assembly; 21-fixing support; 211-double leveling base; 212-connecting column; 213-connecting plate; 214-first leveling base; 215-second leveling base; 22-control box; 23-guiding block; 24-spinning mechanism; 241-spinning cylinder; 242-spinning arm; 243-pressing rod; 25-positioning plate. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present application will be described in detail below with reference to the drawings, in which the same or similar components are denoted by the same reference numerals, and therefore the description will be omitted. The drawings constitute a part of this patent document. The drawings along with the present application serve to explain the principles of the present application, and are not intended to limit the scope of the present application.

[0042] Example 1

[0043] A specific embodiment of the present application is shown in FIG. 1, in which Figure 1 , Figure 9As shown, a workpiece positioning spraying system (hereinafter referred to as positioning spraying system) is disclosed, which comprises a spraying unit 1 and a fixing assembly 2 for fixing a transfer trolley, and the spraying unit 1 is arranged beside the fixing assembly 2 and used for spraying the workpiece on the transfer trolley fixed by the fixing assembly 2. Preferably, the top of the transfer trolley is provided with a profiling assembly for supporting the workpiece to be sprayed. The main body length of the transfer trolley is about 100mm shorter than the length of the workpiece, so as to ensure that the hand of the person placing the workpiece will not be under the workpiece, thereby preventing hand clamping.

[0044] As shown in Figure 1 , the spraying unit 1 comprises a support assembly 11, a supply assembly 12, a spraying assembly 13 and a control assembly. The support assembly is used for supporting and fixing the spraying unit 1 and protecting the control system components. The supply assembly 12 is used for providing the spraying unit 1 with paint required for spraying operation. The spraying assembly 13 is used for completing automatic spraying operation. The control assembly is used for controlling the spraying system of the spraying unit 1 and the working state of the spraying assembly 13.

[0045] As shown in Figure 1 and Figure 3 , the support assembly 11 comprises an adjusting bottom plate 111, a robot base 112 and an outer shell 113. The adjusting bottom plate 111 is connected and fixed to the ground through expansion bolts. The bottom of the robot base 112 is connected and fixed to the adjusting bottom plate 111 through adjusting bolts. The outer shell 113 is arranged outside the robot base 112 to protect the robot base 112 and the control components from being contaminated by spraying. Considering the maintenance and repair of the control components, a repair door 114 is arranged on the outer shell 113. The repair door 114 is opposite to the control components.

[0046] In this embodiment, since the installation area of the spraying unit 1 can be a non-horizontal surface, the bottom of the adjusting bottom plate 111 and the robot base 112 are connected through adjusting bolts to ensure that the spraying unit 1 is fixed on a horizontal surface, so that the height of the spraying unit 1 is suitable for the spraying height, and the height can be adjusted according to different application requirements.

[0047] Considering that the position of the steel bars can coincide with the position of the installation holes of the adjusting bottom plate 111 on the ground, the adjusting bottom plate 111 adopts a design of multiple large round holes + thick gaskets, which can be punched at multiple positions on the ground to prevent the round hole design position from coinciding with the position of the steel bars on the ground.

[0048] The supply assembly 12 is used for continuously supplying paint and is arranged on the top of the support assembly 11 and connected with the support assembly 11 through a mounting seat 115. Figure 2 and Figure 4As shown, the supply assembly 12 includes a pressure tank 121, an agitator 122 and a pressure regulating valve 123, the pressure tank 121 is connected with the mounting base 115, and the agitator 122 and the pressure regulating valve 123 are both arranged at the top of the pressure tank 121. The pressure regulating valve 123 can adjust the air pressure inside the pressure tank 121 from 1 bar to 3 bar, so as to provide paint with different flow rates, and in principle, the air pressure is adjusted to meet the use of the spray gun.

[0049] Preferably, the pressure tank 121 is made of stainless steel, which is convenient for disassembly and cleaning. The capacity of the tank is selected to be 1L, which can meet the spraying requirements, reduce waste during cleaning and facilitate cleaning. The agitator 122 is a pneumatic constant-speed agitator, which can keep the paint always stirred under the premise of meeting the explosion-proof requirement, so as to ensure that the paint does not settle and air bubbles are not generated due to the increase of stirring speed caused by the decrease of paint.

[0050] The top of the pressure tank 121 is also provided with a discharge port 124, the other end of which is connected to the bottom of the pressure tank 121, so as to ensure that the paint inside the tank is used as much as possible and is not left in excess, thereby avoiding waste of paint.

[0051] In combination with Figure 1 , Figure 3 , Figure 5 and Figure 6 , the spraying assembly 13 includes a spraying robot 131 and an automatic spray gun 132. The spraying robot 131 is used to realize spraying tracks with different heights and angles, and the automatic spray gun 132 is used for automatic spraying of paint. The spraying robot 131 is arranged on the top of the robot base 112 and is located beside the mounting base 115, as shown in Figure 7 and Figure 8 , the automatic spray gun 132 is arranged at the end of the spraying robot 131. The spraying robot 131 has online and offline programming capabilities, and different spraying tracks can be set according to different spraying objects, so as to realize specific spraying work.

[0052] In this embodiment, in order to prevent the paint from settling during spraying and to reduce the waste of paint caused by the length of the pipeline as much as possible, the agitating pressure tank is arranged beside the spraying robot 131. Specifically, the spraying robot 131 is arranged on the top of the robot base 112, and the pressure tank 121 is arranged on the top of the robot base 112 through the mounting base 115. The distance between the pressure tank 121 and the spraying robot 131 is short, which shortens the pipeline of the spraying system and reduces the residual amount in the pipeline, thereby saving paint.

[0053] In combination with Figure 1 and Figure 3As shown, the control assembly includes a manual switch 141 for controlling the operation of the automatic spray gun 132 and a control unit 142 for controlling the action of the supply assembly 12 and the spraying robot 131. The manual switch 141 is arranged on the mounting seat 115, and the control unit 142 is connected with the robot base 112 and corresponds to the maintenance door 114. Preferably, the manual switch 141 is automatically controlled by an electromagnetic valve, and a switch button is added on the mounting seat 115, which can facilitate the inspection of whether the nozzle is blocked and whether the spray size is appropriate.

[0054] Considering the adaptability of the spraying unit 1 to different spraying operations, the automatic spray gun 132 switch is controlled in parallel by the manual switch 141 and the electromagnetic valve. When manually preparing paint, the button is switched to the manual mode, and before automatic spraying, the parameters such as the atomization degree and fan width of the spray gun are checked to see whether they meet the spraying requirements. At this time, the spraying robot 131 does not move when the execution program is clicked, preventing risks caused by personnel misoperation. Under the premise that the conditions meet the requirements of automatic spraying, the button is switched to the automatic mode, the automatic spray gun 132 is controlled by the electromagnetic valve, the equipment is started, and the spraying robot 131 can realize automatic spraying operation.

[0055] The control system of the control unit 142 takes PLC as the control core, realizes data connection and interaction with the robot system and the spraying system through the Profinet bus, controls the spraying system and the action of the robot, remotely controls the spraying parameters of the automatic spray gun 132, can automatically adjust the flow, atomization, fan width, spray gun switch and other parameters of the automatic spray gun 132, and ensures the consistency of the spraying process. The electrical components of the supply assembly 12 and the spraying assembly 13 work in coordination to realize equipment fault monitoring, alarm, emergency stop and other functions.

[0056] In this embodiment, the supply assembly 12 and the control unit 142 are respectively located at both ends of the robot base 112, realizing distributed installation of electrical and pneumatic control components, shortening the production preparation time, reducing the size of the spraying unit, and being applicable to small-area coating work areas to meet small-batch production requirements or non-continuous coating production requirements.

[0057] As shown in Figure 9 and Figure 10 The fixing assembly 2 includes a fixing support 21 and a control box 22. The control box 22 is arranged on the top of the fixing support 21, and the control box 22 is provided with an electromagnetic valve and a start button. The start button is used to control the action of the spinning cylinder, and is used to control the automatic locking and release of the transfer trolley.

[0058] In this embodiment, the control box 22 is designed in a dustproof and sealed structure, and the spinning cylinder, electromagnetic valve and other electrical components are arranged therein, which can effectively prevent paint from adhering to them during spraying, causing mechanism failure and other conditions.

[0059] As shown in Figure 9 , the fixed support 21 comprises a double leveling base 211, a connecting column 212 and a connecting plate 213, one end of the connecting column 212 is connected with the double leveling base 211, the other end is connected with the connecting plate 213, and the double leveling base 211 is parallel to the connecting plate 213. The double leveling base 211 comprises a first leveling base 214 and a second leveling base 215, the first leveling base 214 is located at the upper end of the second leveling base 215, and the projection of the first leveling base 214 towards the second leveling base 215 is part of the second leveling base 215, that is, the cross-sectional area of the first leveling base 214 is smaller than that of the second leveling base 215, with the horizontal plane as the cross section. The first leveling base 214 is connected with the second leveling base 215 through an adjusting bolt, and the second leveling base 215 is fixed to the ground through an expansion bolt, so as to keep the stability and overall levelness of the fixed assembly 2.

[0060] In order to facilitate the pushing of the transfer trolley into the fixed assembly 2, as shown in Figure 9 and Figure 10 , the fixed assembly 2 further comprises guide blocks 23, which are connected with the side of the control box 22 close to and parallel to the transfer trolley, and two guide blocks 23 are arranged at the two ends of the control box 22. The width of the transfer trolley is equal to the distance between the two guide blocks 23, so that the width direction of the transfer trolley is just clamped between the two guide blocks 23. In order to facilitate the pushing of the transfer trolley, the front end of the guide block 23, i.e. the pushing end of the transfer trolley, is chamfered.

[0061] In this embodiment, guide blocks 23 are designed on the front side of the positioning mechanism. The guide blocks 23 are designed with large chamfer and long distance guiding, so that workers can more easily push the transfer trolley into the fixed assembly 2. The guide blocks 23 are integrally processed by POM (polyformaldehyde), which can prevent sparks from being generated by friction between the guide blocks 23 and the transfer trolley under the premise of meeting the guiding requirement, so as to meet the on-site explosion-proof requirement. The periphery of the guide block 23 is designed with a round corner to prevent accidental collision from causing harm to the human body.

[0062] In order to connect the transfer trolley with the fixed assembly 2, as shown in Figure 9 and Figure 10 , the fixed assembly 2 further comprises a spinning mechanism 24, which is connected with the side of the control box 22 close to and parallel to the transfer trolley, and two spinning mechanisms 24 are arranged corresponding to the two guide blocks 23.

[0063] As shown in Figure 11As shown, the spinning mechanism 24 includes a spinning cylinder 241, a spinning arm 242 and a pressing rod 243, the cylinder body of the spinning cylinder 241 is located in the control box 22, one end of the spinning arm 242 is connected with the spinning cylinder 241, and the spinning arm 242 is rotated from a horizontal direction to a vertical direction under the action of the spinning cylinder 241, and the other end is threadedly connected with the pressing rod 243, the pressing rod 243 is perpendicular to the spinning arm 242, and when the spinning arm 242 is rotated from the horizontal state to the vertical state, the end of the pressing rod 243 abuts against the transfer trolley, so that the connection between the transfer trolley and the fixed assembly 2 is realized. Preferably, the pressing rod 243 is an adjustable bolt.

[0064] In order to increase the service life of the transfer trolley, the pressing rod 243 does not directly act on the plate of the transfer trolley, but a pressing fixing block is arranged at the contact position of the transfer trolley and the pressing rod 243, and when the spinning arm 242 is rotated from the horizontal state to the vertical state, the end of the pressing rod 243 abuts against the pressing fixing block, so that the service life of the transfer trolley is increased. In view of safety, the abutting end of the pressing rod 243 is provided with a protective layer made of rubber, so as to prevent hard contact and the risk of explosion caused by sparks.

[0065] It is worth noting that the rotating directions of the spinning arms 242 of the two spinning mechanisms 24 are different, one rotates clockwise and the other rotates counterclockwise, when the transfer trolley is pushed into the space limited by the guide blocks 23 of the fixed assembly 2, the locking switch is manually rotated, the spinning cylinder 241 drives the spinning arm 242 to rotate, and the end of the pressing rod 243 provided with a soft protective layer abuts against the pressing fixing block.

[0066] As shown in the figure, Figure 9 The fixed assembly 2 further includes two positioning plates 25, the positioning plates 25 are connected with the control box 22 close to the side surface of the transfer trolley and parallel to the side surface, and the two positioning plates 25 correspond to the two supporting legs of the transfer trolley respectively, and when the transfer trolley is connected with the fixed assembly 2, the positioning plates 25 abut against the supporting legs. In the embodiment, the positioning plates 25 are detachably connected with the control box 22 through bolts, and after being used for a period of time, new positioning plates 25 are replaced to avoid the position deviation of the workpiece caused by the accumulation of paint. At the same time, the positional relationship between the pressing rod 243 and the pressing fixing block can be adjusted to adapt to the positioning size between the transfer trolley and the fixed assembly 2.

[0067] In the embodiment, for the product transfer before and after the robot spraying operation, the transfer trolley can be quickly locked or released through the electromagnetic valve button, the quick transfer of the product between the spraying work area and the non-working area is realized, the operation difficulty is reduced, and the work efficiency is greatly improved.

[0068] Embodiment 2

[0069] Another specific embodiment of the application is shown in the figure, Figures 1-11As shown, a positioning spraying method of a workpiece is disclosed, which uses the positioning spraying system of the workpiece of embodiment 1, and comprises the following steps:

[0070] Step S1: The movement of the transfer trolley on which the workpiece to be sprayed is placed is limited by the guide block 23.

[0071] The transfer trolley is provided with a profiling assembly for fixing the workpiece to be sprayed to control the posture of the workpiece to be sprayed, the movement direction of the transfer trolley is limited by the guide block 23, and the transfer trolley 1 is aligned with the spinning mechanism 24. During the movement of the transfer trolley from the non-working area to the spraying working area, the distance between the transfer trolley and the fixing assembly 2 is continuously shortened until the transfer trolley contacts the guide block 23, and the movement direction of the transfer trolley 1 is limited by the guide block 23.

[0072] Step S2: Start the start button in the control box 22 to make the spinning air cylinder 241 drive the spinning arm 242 to act, and automatically lock the transfer trolley. The start button is used to control the action of the spinning air cylinder 241 to realize the automatic locking of the transfer trolley 1.

[0073] Step S3: Add paint to the feeding assembly 12 to start the automatic spraying operation;

[0074] The upper cover of the pressure tank 121 is manually opened, the prepared paint is poured into the tank, after the tank is closed, the stirrer 122, pressure regulating valve 123 and other components are started. The automatic spray gun 132 is opened by using the manual switch 141, the spraying condition is checked, after the qualified personnel leave the scene, the spraying program is started remotely, and the automatic spraying operation is started.

[0075] It should be noted that when the paint in the pressure tank 121 is used up, the control unit 142 transmits the “paint used up” information and alarms, and the spraying robot 131 returns to the original position after completing the spraying program. The upper cover of the tank of the pressure tank 121 is manually opened, the prepared paint is poured into the tank, the spraying program is started remotely, and the automatic spraying operation is restarted.

[0076] Step S4: After the spraying is finished, the start button is closed, the transfer trolley is released, the transfer trolley is pushed out of the spraying working area, and steps S1-S4 are repeated to spray the next workpiece to be sprayed.

[0077] After the spraying operation is finished, the start button is closed, the spinning air cylinder 241 drives the spinning arm 242 to return to the horizontal state, the transfer trolley is released, and the transfer trolley can immediately turn out of the spraying working area to transfer the new workpiece to be sprayed into the robot spraying working area.

[0078] Step S5: Clean the pressure tank 121 and the automatic spray gun 132.

[0079] When the spraying operation of all the workpieces to be sprayed is completed, the pressure tank 121 is manually removed and cleaned, a cleaning agent is added to the inside of the pressure tank 121, the control system switches to a cleaning program, the manual switch 141 or the remote automatic spray gun 132 is started to spray the cleaning agent from the gun nozzle until the cleaning agent is used up in the pressure tank 121. After cleaning twice, the automatic spray gun 132 is closed.

[0080] The spraying method provided in the embodiment can quickly lock or release the transfer trolley in the spraying work area only by starting the button, the product can be quickly transferred between the spraying work area and the non-working area, the operation difficulty is greatly reduced, and the work efficiency is greatly improved.

[0081] The above describes only the preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A workpiece positioning spraying system, characterized in that: It includes a spraying unit and a fixing assembly. The fixing assembly is used to fix the transfer vehicle, and the spraying unit is used to spray the workpiece to be sprayed on the transfer vehicle. The fixing assembly includes a control box, a spinning mechanism, a guide block and a positioning plate. The spinning mechanism is parallel to the control box and connected close to the side of the transfer vehicle. The spraying unit includes a support assembly, a feeding assembly and a spraying assembly, the support assembly includes a robot base, the feeding assembly includes a pressure tank, the spraying assembly includes a spraying robot, and the spraying robot and the pressure tank are both placed on the top of the robot base; The spinning mechanism includes a spinning cylinder, a spinning arm and a pressing rod. The cylinder body of the spinning cylinder is located in the control box. One end of the spinning arm is connected to the spinning cylinder. Under the action of the spinning cylinder, the spinning arm is rotated from horizontal to vertical. The other end of the spinning arm is threadedly connected to the pressing rod. The pressing rod is perpendicular to the spinning arm. When the spinning arm is rotated from a horizontal state to a vertical state, the end of the pressing rod is pressed against the transfer vehicle to achieve the connection between the transfer vehicle and the fixed component. A solenoid valve and a start button are provided in the control box. The start button controls the action of the spinning cylinder to control the automatic locking and release of the transfer vehicle. The guide block and the positioning plate are both connected to the side of the control box close to and parallel to the transfer cart. The distance between the two guide blocks is equal to the width of the transfer cart. The front end of the guide block is provided with a chamfer. The two positioning plates correspond to the two legs of the transfer cart respectively. When the transfer cart is connected to the fixed assembly, the positioning plate rests on the legs. The positioning plate is arranged between the two guide blocks.

2. The workpiece positioning spraying system according to claim 1, characterized in that: The spraying unit also includes a control component, a feeding component for providing the paint required for the spraying operation, a spraying component for completing the automatic spraying operation, and a control component for controlling the spraying system.

3. The workpiece positioning spraying system according to claim 2, characterized in that: The support assembly also includes an adjustment base plate and a shell. The lower end of the robot base is connected to the adjustment base plate, and the shell is arranged around the outer side of the robot base.

4. The workpiece positioning spraying system according to claim 3, characterized in that: There is a maintenance door on the shell.

5. The workpiece positioning spraying system according to claim 3, characterized in that: The spraying assembly also includes an automatic spray gun. One end of the spraying robot is placed on the top of the robot base, and the other end is provided with an automatic spray gun.

6. The workpiece positioning spraying system according to claim 4, characterized in that: The control component includes a control unit, which is connected to the robot base and corresponds to the maintenance door.

7. The workpiece positioning spraying system according to any one of claims 1 to 6, characterized in that: The fixing assembly includes a fixing support, and the fixing support includes a double leveling base, a connecting column and a connecting plate which are connected in sequence.

8. A method for positioning spraying of a workpiece, characterized in that: A workpiece positioning spraying system according to any one of claims 1 to 7 comprises the following steps: Step S1: limiting the movement of the transfer vehicle on which the workpiece to be sprayed is placed by a guide block; Step S2: Activate the start button inside the control box to enable the spinning cylinder to drive the spinning arm to move and automatically lock the transfer vehicle; Step S3: Add paint to the feeding assembly and start the automatic spraying operation; Step S4: After spraying is completed, turn off the start button, release the transfer vehicle, push the transfer vehicle out of the spraying work area, and repeat steps S1 to S4 to spray the next workpiece to be sprayed; Step S5: Complete the spraying operation of all workpieces to be sprayed, and clean the pressure tank and automatic spray gun.

Images