Automatic cleaning equipment for welding workpiece

Abstract

An automatic cleaning device and method for welding workpieces, wherein the automatic cleaning device for welding workpieces comprises a welding seam welding ash cleaning unit, a workpiece overall cleaning unit, a rinsing unit, a wind cutting unit and a vacuum drying unit arranged in sequence along the workpiece feeding direction; the welding seam welding ash cleaning unit is provided with a mechanical arm, a high-pressure water gun, a positioner and a workpiece fixing platform, the mechanical arm is arranged in two groups symmetrically on the left and right, each group of mechanical arms is equipped with a high-pressure water gun, and the high-pressure water gun can be driven by the mechanical arm to move in space, the positioner is provided with a servo motor and a rotating shaft on the left and right sides, the workpiece fixing platform is respectively fixedly assembled with the corresponding rotating shaft on the positioner on the left and right sides, and a workpiece clamping mechanism is provided on the workpiece fixing platform. The present invention optimizes the design of the automatic cleaning device and innovates an automatic cleaning method for welding workpieces, thereby achieving the purpose of improving the cleaning efficiency and reducing the production cost.

Description

Technical Field

[0001] The present invention relates to a cleaning device and a cleaning method, in particular to an automated cleaning device and a cleaning method suitable for welding workpieces. Background Art

[0002] Under the general trend of automotive lightweighting, the application of aluminum alloy materials is becoming more and more widespread. In particular, the production of new energy vehicle battery trays generally adopts the aluminum alloy material welding and forming process. As the carrier of the new energy vehicle battery module, the battery tray not only has strict requirements for mechanical strength, but also has very high requirements for cleanliness after welding and forming. In the production process of the above-mentioned aluminum alloy battery tray, the two major factors affecting cleanliness are residual cutting fluid and welding ash. Among them, the residual cutting fluid is the cutting fluid attached to the battery tray during the machining of the product; the welding ash is due to the welding and forming of workpieces usually using technologies such as MIG welding (i.e., inert gas shielded arc welding, which uses inert gas to cover the welding part to promote arc stability and prevent changes in welding quality, and at the same time uses arc heat to melt the metal of the welding part and feeds in the welding rod to connect the weld seam) and laser welding. In particular, the MIG welding process is widely used in the production process of automotive aluminum alloy parts. However, after aluminum alloy MIG welding, black ash will be generated and attached near the weld bead, seriously affecting the cleanliness and appearance quality of the workpiece. Therefore, after the aluminum alloy battery tray welding operation is completed, it is necessary to clean it.

[0003] In the prior art, for the problem of post-welding cleaning treatment of the above-mentioned aluminum alloy battery tray, the methods of manual wiping and immersion cleaning are usually adopted. Among them, manual wiping is to use a cleaning agent in cooperation with a wire brush or cotton cloth to clean the workpiece, which has defects such as low work efficiency and unstable cleaning effect. In addition, the manual wiping method also has the problem of being difficult to connect with an automated production line; immersion cleaning is to first immerse the workpiece in a water tank added with a cleaning agent for a certain period of time, and then transfer it to clean water for rinsing. This method has a high equipment usage cost. At the same time, due to the addition of a cleaning agent during cleaning, a large amount of polluted wastewater will be generated, increasing the cost of wastewater treatment. Summary of the Invention

[0004] The present invention provides an automated cleaning device and a cleaning method for welding workpieces, aiming to optimize and design an automated cleaning device matching the aluminum alloy battery tray, and at the same time innovate an automated cleaning method to achieve the purpose of improving the cleaning work efficiency and reducing the production cost.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] An automatic cleaning device for welded workpieces, comprising a weld slag cleaning unit, an overall workpiece cleaning unit, a rinsing unit, an air knife unit, a vacuum drying unit and a transfer mechanism; the weld slag cleaning unit, the overall workpiece cleaning unit, the rinsing unit, the air knife unit and the vacuum drying unit are arranged in corresponding workstations in sequence along the workpiece feeding direction, and the transfer mechanism is used to complete the transportation of the workpiece between two adjacent workstations; the weld slag cleaning unit is provided with a robotic arm, a high-pressure water gun, a positioner and a workpiece fixing platform. Two groups of robotic arms are arranged symmetrically left and right, and a high-pressure water gun is installed on each group of robotic arms. The water inlet end of the high-pressure water gun is connected to a high-pressure water pump, and the high-pressure water gun can be driven by the robotic arm to perform spatial movement, so that the nozzle of the high-pressure water gun is aligned with the weld position of the welded workpiece. The positioner is provided with servo motors on both left and right sides and rotating shafts connected to the output ends of the servo motors. The left and right sides of the workpiece fixing platform are respectively fixedly assembled with the corresponding rotating shafts on the positioner, and a workpiece clamping mechanism is arranged on the workpiece fixing platform.

[0007] For the above-mentioned automatic cleaning device for welded workpieces, the high-pressure water gun is equipped with an eccentric rotary nozzle and / or a double-port rotary nozzle; the eccentric rotary nozzle includes a rotating body and an eccentric nozzle. The rotating body is a cylindrical sleeve structure, one end of which is assembled with the water inlet joint of the high-pressure water gun, and the eccentric nozzle is installed on the other end face of the rotating body. When the high-pressure water gun is in the working state, high-pressure water flows out of the eccentric nozzle and pushes the rotating body to rotate, thereby forming an annular water column; the double-port rotary nozzle includes a rotating body and two eccentric nozzles. The rotating body is a stepped sleeve structure, the small-diameter end of which is assembled with the water inlet joint of the high-pressure water gun, and two eccentric nozzles are installed on the large-diameter end face thereof. When the high-pressure water gun is in the working state, the rotating body is driven by high-pressure water to rotate at a high speed, forming an annular water column ejected from the two eccentric nozzles.

[0008] For the above-mentioned automatic cleaning device for welded workpieces, the workpiece clamping mechanism is a number of groups of pneumatic clamps arranged around the fixed platform.

[0009] For the above-mentioned automatic cleaning device for welded workpieces, the overall workpiece cleaning unit is provided with a cleaning workbench and a number of groups of high-pressure fixed nozzles arranged above the cleaning workbench, and the high-pressure fixed nozzles are connected to a high-pressure cleaning water pump.

[0010] For the above-mentioned automatic cleaning device for welded workpieces, the rinsing unit is provided with a rinsing workbench and a number of groups of rinsing nozzles arranged above the rinsing workbench. The rinsing nozzles are connected in a circulating water pipeline, and a circulating pump and a filter are arranged in the circulating water pipeline.

[0011] An automatic cleaning method for welded workpieces, which completes the post-welding cleaning operation of the welded workpieces through the above-mentioned automatic cleaning device. The specific operation steps are as follows:

[0012] a. Loading: The welded workpiece is transferred to the weld ash cleaning station by a transfer mechanism, placed in an inverted manner on the workpiece fixing platform of the weld ash cleaning unit, and clamped and positioned by several groups of pneumatic clamps arranged around the fixing platform.

[0013] b. Start the servo motors on both sides of the turntable in the weld ash cleaning unit, driving the workpiece fixing platform to rotate by a certain angle.

[0014] c. Adjust the positions of the robotic arm and the high-pressure water gun in the weld ash cleaning unit so that the nozzle of the high-pressure water gun is opposite to the weld on the welded workpiece.

[0015] d. Set the cleaning method matching the environmental conditions and select the high-pressure water gun nozzle with the corresponding structure.

[0016] e. Start the operation switch of the robotic arm in the weld ash cleaning unit, and the control system controls the movement of the robotic arm, making the nozzle of the high-pressure water gun move along the direction consistent with the weld.

[0017] f. Repeat steps b, c, d, and e to complete the cleaning process of the weld ash on the welded workpiece.

[0018] g. The welded workpiece is transferred from the weld ash cleaning station to the overall workpiece cleaning station by a transfer mechanism, fixed on the cleaning workbench of the overall workpiece cleaning unit, and then the overall cleaning is carried out on it by the high-pressure fixed nozzle of the overall workpiece cleaning unit.

[0019] h. The welded workpiece is transferred from the overall cleaning station to the rinsing station by a transfer mechanism, fixed on the rinsing workbench of the rinsing unit, and then rinsed by the rinsing nozzle of the rinsing unit.

[0020] i. The welded workpiece is transferred from the rinsing station to the air knife station by a transfer mechanism, and the air knife unit drains most of the water on the welded workpiece by blowing air.

[0021] j. The welded workpiece is transferred from the air knife station to the vacuum drying station by a transfer mechanism, and the vacuum drying unit vaporizes the remaining water on the workpiece by vacuum pumping and heating and then conducts vacuum drying on it.

[0022] k. The welded workpiece is transferred from the vacuum drying station to the unloading station by a transfer mechanism to complete the post-welding cleaning operation of the welded workpiece.

[0023] In the above-mentioned automatic cleaning method for welded workpieces, in step d, when the water temperature for cleaning the weld ash is 20 °C, an eccentric rotary nozzle is selected, the water flow rate is controlled at 4 L / min, the distance between the nozzle and the weld is less than 100 mm, the nozzle moving speed is 30 - 50 mm / s, and the injection pressure of the nozzle is 100 Mpa - 120 Mpa.

[0024] In the above-mentioned automatic cleaning method for welded workpieces, in step d, when the water temperature for cleaning the welding slag on the weld is 20°C, a double-port rotary nozzle is selected, the water flow rate is controlled at 9 L / min, the distance between the nozzle and the weld is less than 100 mm, the moving speed of the nozzle is 30 - 70 mm / s, and the spraying pressure of the nozzle is 100 Mpa - 120 Mpa.

[0025] In the above-mentioned automatic cleaning method for welded workpieces, in step d, when the water temperature for cleaning the welding slag on the weld is 60°C, an eccentric rotary nozzle is selected, the water flow rate is controlled at 4 L / min, the moving speed of the nozzle is 5 mm / s, and the spraying pressure of the nozzle is above 28 Mpa.

[0026] In the above-mentioned automatic cleaning method for welded workpieces, in step g, the spraying pressure of the high-pressure fixed nozzle is 40 - 60 Mpa.

[0027] The present invention provides an automatic cleaning equipment and method for welded workpieces, which is particularly suitable for the post-welding cleaning operation of aluminum alloy battery trays. By using the automatic cleaning equipment described in the present invention to clean the welded workpieces, the waste water can be recycled after filtration. The solid particles washed down accumulate in the filter screen, and it can be used normally only by cleaning or replacing the filter screen regularly. Since no chemical agents are used, compared with the immersion method, the environmental pollution problem is solved from the source, the waste water treatment process is reduced, and the investment and operation costs of waste water equipment are reduced. The present invention can remove the welding slag in the corners or gaps of the weld through the welding slag cleaning unit of the weld. Compared with the manual wiping method, it has the characteristics of good cleaning effect and high work efficiency. The welding slag cleaning unit of the weld of the present invention realizes the integrated structure of a high-pressure water gun and a robotic arm, and the cleaning trajectory can be controlled by programming, which improves the flexibility of the cleaning equipment and is convenient for popularization and application. In short, the present invention optimizes the design of the automatic cleaning equipment and innovates an automatic cleaning method for welded workpieces, so as to achieve the purpose of improving the cleaning work efficiency and reducing the production cost. Brief Description of the Drawings

[0028] Figure 1 is a schematic plan layout diagram (top view) of the automatic cleaning equipment for welded workpieces;

[0029] Figure 2 is a schematic structural diagram of the welding slag cleaning unit of the weld;

[0030] Figure 3 is Figure 2 View A of

[0031] Figure 4 is Figure 2 View B of

[0032] Figure 5Schematic diagram of an eccentric rotary nozzle of a high-pressure water gun;

[0033] Figure 6 Schematic diagram of the working process of an eccentric rotary nozzle;

[0034] Figure 7 Schematic diagram of a double-port rotary nozzle of a high-pressure water gun;

[0035] Figure 8 Schematic diagram of the working process of a double-port rotary nozzle.

[0036] The list of each label in the figure is as follows:

[0037] 1. Weld slag cleaning unit, 1-1. Robot arm, 1-2. High-pressure water gun, 1-2-1. Rotating body, 1-2-2. Eccentric nozzle, 1-3. Positioner, 1-3-1. Servo motor, 1-3-2. Rotating shaft, 1-4. Workpiece fixing platform, 1-5. Workpiece clamping mechanism;

[0038] 2. Overall workpiece cleaning unit, 2-1. Cleaning workbench, 2-2. High-pressure fixed nozzle;

[0039] 3. Rinsing unit, 3-1. Rinsing workbench, 3-2. Rinsing nozzle;

[0040] 4. Air knife unit;

[0041] 5. Vacuum drying unit;

[0042] 6. Welded workpiece. Detailed implementation mode

[0043] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0044] Referring to FIG. 1, the automatic cleaning equipment for welded workpieces of the present invention includes a weld slag cleaning unit 1, an overall workpiece cleaning unit 2, a rinsing unit 3, an air knife unit 4, a vacuum drying unit 5 and a transfer mechanism (not shown in the figure); the weld slag cleaning unit 1, the overall workpiece cleaning unit 2, the rinsing unit 3, the air knife unit 4, and the vacuum drying unit 5 are arranged in corresponding workstations in sequence along the workpiece feeding direction, and the transfer mechanism is used to complete the transfer of the workpiece between adjacent two workstations; the overall workpiece cleaning unit 2 is provided with a cleaning workbench 2-1 and a plurality of groups of high-pressure fixed nozzles 2-2 arranged above the cleaning workbench 2-1, and the high-pressure fixed nozzles 2-2 are connected to a high-pressure cleaning water pump; the rinsing unit 3 is provided with a rinsing workbench 3-1 and a plurality of groups of rinsing nozzles 3-2 arranged above the rinsing workbench 3-1, the rinsing nozzles 3-2 are connected in a circulating water pipeline, and a circulating pump and a filter are arranged in the circulating water pipeline.

[0045] Referring to Figure 2 、Figure 3 、 Figure 4 , in the welding workpiece automatic cleaning equipment described in the present invention, the weld ash cleaning unit 1 is provided with a mechanical arm 1-1, a high-pressure water gun 1-2, a positioner 1-3 and a workpiece fixing platform 1-4, the mechanical arm 1-1 is arranged in two groups symmetrically on the left and right, and each group of mechanical arms 1-1 is equipped with a high-pressure water gun 1-2, the water inlet end of the high-pressure water gun 1-2 is connected to a high-pressure water pump, and an eccentric rotating nozzle and / or a double-mouth rotating nozzle is equipped at the water outlet end of the high-pressure water gun 1-2, which can drive the high-pressure water pump through the mechanical arm 1-1. The gun 1-2 moves in space, so that the nozzle of the high-pressure water gun 1-2 is aligned with the weld position of the welding workpiece 6. The left and right sides of the positioner 1-3 are provided with a servo motor 1-3-1 and a rotating shaft 1-3-2 connected to the output end of the servo motor. The left and right sides of the workpiece fixing platform 1-4 are respectively fixedly assembled with the corresponding rotating shaft 1-3-2 on the positioner 1-3. The workpiece fixing platform 1-4 is provided with a workpiece clamping mechanism 1-5, which is a plurality of groups of pneumatic clamps arranged around the fixing platform 1-4.

[0046] See Figure 5 、 Figure 6 , in the welding workpiece automatic cleaning equipment described in the present invention, the eccentric rotary nozzle equipped on the high-pressure water gun 1-2 includes a rotating body 1-2-1 and an eccentric nozzle 1-2-2. The rotating body 1-2-1 is a cylindrical sleeve structure, one end of which is assembled with the water inlet joint of the high-pressure water gun 1-2, and the eccentric nozzle 1-2-2 is installed on the other end face of the rotating body 1-2-1. When the high-pressure water flow impacts the eccentric rotary nozzle, the impact force of the water flow causes the rotating body 1-2-1 to generate a rotational force. The rotation of the rotating body 1-2-1 drives the eccentric nozzle 1-2-2 to rotate, and the water flow is ejected from the rotating eccentric nozzle 1-2-2 to form a rotating annular water column. The rotational force and the high-pressure impact force are combined. When it contacts the dirty surface of the workpiece, it will produce a very strong peeling effect, and the dirt will be washed away instantly.

[0047] See Figure 7 、 Figure 8 , in the welding workpiece automatic cleaning equipment described in the present invention, the double-mouth rotating nozzle equipped on the high-pressure water gun 1-2 includes a rotating body 1-2-1 and two eccentric nozzles 1-2-2. The rotating body 1-2-1 is a stepped sleeve structure, and its small diameter end is assembled with the water inlet joint of the high-pressure water gun 1-2 through a bearing. Two eccentric nozzles 1-2-2 are installed on its large diameter end surface. During cleaning, the front nozzle can be driven by the bearing to rotate at a high speed to form an annular water column. Due to the high speed of the bearing matching structure and the two nozzles at the front of the nozzle, the water flow is larger, so the stripping effect and cleaning effect are better.

[0048] See Figure 1 、 Figure 2, Figure 3 , Figure 4 , the automated cleaning method for welded workpieces according to the present invention uses the above-mentioned automated cleaning equipment to complete the post-welding cleaning operation of welded workpieces, and its operation steps are as follows:

[0049] a. Loading: The welded workpiece 6 is transferred to the weld slag cleaning station through the transfer mechanism, placed in an inverted manner on the workpiece fixing platform 1-4 of the weld slag cleaning unit 1, and clamped and positioned by several groups of pneumatic clamps arranged around the workpiece fixing platform 1-4;

[0050] b. Start the servo motors 1-3-1 on both the left and right sides of the turntable 1-3 in the weld slag cleaning unit 1 to drive the workpiece fixing platform 1-4 to rotate a certain angle;

[0051] c. Adjust the positions of the robotic arm 1-1 and the high-pressure water gun 1-2 in the weld slag cleaning unit 1 so that the nozzle of the high-pressure water gun 1-2 is opposite to the weld on the welded workpiece 6;

[0052] d. Set the cleaning method matching the environmental conditions and select the high-pressure water gun nozzle with the corresponding structure; when the water temperature for cleaning the weld slag is 20°C, an eccentric rotary nozzle is selected, the water flow rate is controlled at 4 L / min, the distance between the nozzle and the weld is less than 100 mm, the nozzle moving speed is 30 - 50 mm / s, and the injection pressure of the nozzle is 100 Mpa - 120 Mpa; when the water temperature for cleaning the weld slag is 20°C, a double-port rotary nozzle is selected, the water flow rate is controlled at 9 L / min, the distance between the nozzle and the weld is less than 100 mm, the nozzle moving speed is 30 - 70 mm / s, and the injection pressure of the nozzle is 100 Mpa - 120 Mpa; when the water temperature for cleaning the weld slag is 60°C, an eccentric rotary nozzle is selected, the water flow rate is controlled at 4 L / min, the nozzle moving speed is 5 mm / s, and the injection pressure of the nozzle is above 28 Mpa;

[0053] e. Start the operation switch of the robotic arm in the weld slag cleaning unit 1, and the control system controls the movement of the robotic arm 1-1 to make the nozzle of the high-pressure water gun 1-2 move along the direction consistent with the weld;

[0054] f. Repeat the working steps of b, c, d, and e to complete the cleaning process of the weld slag on the welded workpiece 6;

[0055] g. Transfer the welded workpiece 6 from the weld slag cleaning station to the overall workpiece cleaning station through the transfer mechanism, fix it on the cleaning workbench 2-1 of the overall workpiece cleaning unit 2, and then perform overall cleaning on the welded workpiece 6 through the high-pressure fixed nozzle 2-2 of the overall workpiece cleaning unit 2. The injection pressure of the high-pressure fixed nozzle 2-2 is 40 - 60 Mpa;

[0056] h. Transfer the welded workpiece 6 from the general cleaning station to the rinsing station by the transfer mechanism, fix it on the rinsing workbench 3-1 of the rinsing unit 3, and then rinse the welded workpiece 6 through the rinsing nozzle 3-2 of the rinsing unit 3;

[0057] i. Transfer the welded workpiece 6 from the rinsing station to the air-knife station by the transfer mechanism, and the air-knife unit 4 drains most of the water on the welded workpiece 6 by blowing air;

[0058] j. Transfer the welded workpiece from the air-knife station to the vacuum drying station by the transfer mechanism, and the vacuum drying unit 5 performs vacuum drying on the welded workpiece 6 after vaporizing the residual water vapor on it by means of vacuum pumping and heating.

[0059] k. Transfer the welded workpiece 6 from the vacuum drying station to the blanking station to complete the post-weld cleaning operation of the welded workpiece 6.

Claims

1. An automatic cleaning device for welding workpieces, characterized in that: It comprises a weld ash cleaning unit (1), a workpiece cleaning unit (2), a rinsing unit (3), an air cutting unit (4), a vacuum drying unit (5) and a transfer mechanism; the weld ash cleaning unit (1), the workpiece cleaning unit (2), the rinsing unit (3), the air cutting unit (4), and the vacuum drying unit (5) are sequentially arranged at corresponding workstations along the workpiece feeding direction, and the workpiece is transported between two adjacent workstations through the transfer mechanism; the weld ash cleaning unit (1) is provided with a mechanical arm (1-1), a high-pressure water gun (1-2), a positioner (1-3) and a workpiece fixing platform (1-4); the mechanical arm (1-1) is symmetrically arranged in two groups, Each set of mechanical arms (1-1) is equipped with a high-pressure water gun (1-2). The water inlet end of the high-pressure water gun (1-2) is connected to a high-pressure water pump. The high-pressure water gun (1-2) can be driven by the mechanical arm (1-1) to move in space so that the nozzle of the high-pressure water gun (1-2) is aligned with the weld position of the welding workpiece (6). The left and right sides of the positioner (1-3) are provided with a servo motor (1-3-1) and a rotating shaft (1-3-2) connected to the output end of the servo motor. The left and right sides of the workpiece fixing platform (1-4) are respectively fixedly assembled with the corresponding rotating shaft (1-3-2) on the positioner (1-3). A workpiece clamping mechanism (1-5) is provided on the workpiece fixing platform (1-4). The high-pressure water gun (1-2) is equipped with an eccentric rotating nozzle and / or a double-mouth rotating nozzle; the eccentric rotating nozzle comprises a rotating body (1-2-1) and an eccentric nozzle (1-2-2); the rotating body (1-2-1) is a cylindrical sleeve structure, one end of which is assembled with the water inlet joint of the high-pressure water gun (1-2); the eccentric nozzle (1-2-2) is installed on the other end surface of the rotating body (1-2-1); when the high-pressure water gun (1-2) is in a working state, a high-pressure water flow is ejected from the eccentric nozzle (1-2-2) and pushes the rotating body (1-2-1) to move the high-pressure water gun (1-2 ... -2-1) rotates, thereby forming an annular water column; the double-mouth rotating nozzle comprises a rotating body (1-2-1) and two eccentric nozzles (1-2-2); the rotating body (1-2-1) is a stepped sleeve structure, the small diameter end of which is assembled with the water inlet joint of the high-pressure water gun (1-2), and the two eccentric nozzles (1-2-2) are installed on the large diameter end surface of the rotating body (1-2-1); when the high-pressure water gun (1-2) is in a working state, the high-pressure water flow drives the rotating body (1-2-1) to rotate at a high speed, thereby forming an annular water column sprayed by the two eccentric nozzles (1-2-2); The rinsing unit (3) is provided with a rinsing workbench (3-1) and a plurality of groups of rinsing nozzles (3-2) arranged above the rinsing workbench (3-1); the rinsing nozzles (3-2) are connected to a circulating water pipeline, and a circulating pump and a filter are arranged in the circulating water pipeline.

2. The automatic cleaning equipment for welding workpieces according to claim 1 is characterized in that: The workpiece clamping mechanism (1-5) is a plurality of groups of pneumatic clamps arranged around the fixed platform (1-4).

3. The automatic cleaning equipment for welding workpieces according to claim 2 is characterized in that: The workpiece integral cleaning unit (2) is provided with a cleaning workbench (2-1) and a plurality of groups of high-pressure fixed nozzles (2-2) arranged above the cleaning workbench (2-1), wherein the high-pressure fixed nozzles (2-2) are connected to a high-pressure cleaning water pump.

4. A method for automatically cleaning a welding workpiece, characterized in that: It uses any one of the automatic cleaning equipment of claims 1-3 to complete the post-weld cleaning process of the welded workpiece, and its operation steps are as follows: a. Loading, transferring the welding workpiece (6) to the weld ash cleaning station by means of a transfer mechanism, placing it in an inverted manner on a workpiece fixing platform (1-4) of a weld ash cleaning unit (1), and clamping and positioning it by means of a plurality of groups of pneumatic clamps arranged around the workpiece fixing platform (1-4); b. Start the servo motors (1-3-1) on the left and right sides of the positioner (1-3) in the weld ash cleaning unit (1), and drive the workpiece fixing platform (1-4) to rotate a certain angle; c. adjusting the positions of the mechanical arm (1-1) and the high-pressure water gun (1-2) of the weld ash cleaning unit (1) so that the nozzle of the high-pressure water gun (1-2) is opposite to the weld on the welding workpiece (6); d. Set the cleaning method that matches the environmental conditions and select the high-pressure water gun nozzle with the corresponding structure; e. starting the mechanical arm operation switch of the weld ash cleaning unit (1), and controlling the mechanical arm (1-1) to move by the control system so that the nozzle of the high-pressure water gun (1-2) moves in a direction consistent with the weld; f. Repeat steps b, c, d, and e to complete the cleaning process of the weld ash on the weld workpiece (6); g. The welding workpiece (6) is transferred from the welding seam welding ash cleaning station to the overall workpiece cleaning station by means of a transfer mechanism, and fixed on a cleaning workbench (2-1) of the overall workpiece cleaning unit (2), and then the welding workpiece (6) is cleaned as a whole by means of a high-pressure fixed nozzle (2-2) of the overall workpiece cleaning unit (2); the injection pressure of the high-pressure fixed nozzle (2-2) is 40-60 MPa; h. The welding workpiece (6) is transferred from the overall cleaning station to the rinsing station by means of a transfer mechanism, fixed on a rinsing workbench (3-1) of the rinsing unit (3), and then the welding workpiece (6) is rinsed by means of a rinsing nozzle (3-2) of the rinsing unit (3); i. The welding workpiece (6) is transferred from the rinsing station to the wind cutting station by a transfer mechanism, and the wind cutting unit (4) uses air blowing to drain most of the water on the welding workpiece (6); j. The welding workpiece is transferred from the wind cutting station to the vacuum drying station by a transfer mechanism, and the vacuum drying unit (5) vaporizes the residual water on the welding workpiece (6) by vacuuming and heating, and then vacuum dries the workpiece; k. The welding workpiece (6) is transferred from the vacuum drying station to the unloading station by means of a transfer mechanism, thereby completing the post-welding cleaning process of the welding workpiece (6).

5. The automatic cleaning method for welding workpieces according to claim 4 is characterized in that In the step d, when the water temperature for cleaning the weld ash is 20°C, an eccentric rotary nozzle is selected, the water flow rate is controlled to be 4L / min, the distance between the nozzle and the weld is less than 100mm, the nozzle movement speed is 30-50mm / s, and the nozzle injection pressure is 100Mpa-120Mpa.

6. The automatic cleaning method for welding workpieces according to claim 4 is characterized in that In the step d, when the water temperature for cleaning the weld ash is 20°C, a double-mouth rotary nozzle is selected, the water flow rate is controlled to be 9L / min, the distance between the nozzle and the weld is less than 100mm, the nozzle movement speed is 30-70mm / s, and the nozzle injection pressure is 100Mpa-120Mpa.

7. The automatic cleaning method for welding workpieces according to claim 4 is characterized in that In the step d, when the water temperature for cleaning the weld ash is 60°C, an eccentric rotary nozzle is selected, the water flow rate is controlled to be 4L / min, the nozzle movement speed is 5mm / s, and the nozzle injection pressure is above 28Mpa.

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