Rapid testing device for new energy automobile metal plate welding spots

Abstract

The invention belongs to the technical field of sheet metal welding spot detection, and particularly relates to a rapid test device for a sheet metal welding spot of a new energy automobile, the rapid test device comprises a mounting rack and a mechanical arm mechanism fixedly connected to the right side of the mounting rack, the inner wall of the lower side of the mounting rack is fixedly connected with a PLC, and the left side wall of the mounting rack is fixedly connected with a first electric push rod. When a new energy automobile metal plate welding spot is tested, the state that the welding spot is in the seaside for a long time and is eroded by salt in water vapor can be simulated, then the welding spot strength of a sheet metal part is tested, and therefore the comprehensiveness and diversity of test data are improved; and the number of unqualified welding spots can be automatically marked, so that an operator can conveniently record the data subsequently, and the accuracy of recording the data by the operator is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of sheet metal solder joint detection, and particularly relates to a rapid test device for sheet metal solder joints of new energy vehicles. Background Art

[0002] The body structure of new energy vehicles mostly uses sheet metal parts connected by welding. As the key part connecting each sheet metal component, the quality of the solder joints directly affects the overall structural strength of the body. If there are defects in the solder joints, such as false soldering, missed soldering, insufficient welding strength, etc., during the driving of the vehicle, especially when subjected to external forces such as bumps and collisions, the connection between the body sheet metal parts may become loose or break, thereby affecting the overall structural integrity of the vehicle and being unable to effectively protect the lives of passengers in the vehicle. For example, a sheet metal solder joint detection device proposed in the patent publication number CN102944465B.

[0003] Since the seaside is usually an area with a relatively fragile and sensitive ecological environment, new energy vehicles are powered by electricity and do not produce exhaust emissions, which can effectively reduce pollution to the marine environment and coastal air quality, and protect the marine ecosystem and the living environment of coastal residents. Therefore, some coastal cities have introduced a series of new energy vehicle purchase subsidy policies, resulting in an increasing number of new energy vehicles in coastal cities. For new energy vehicles driving along the coast for a long time, the solder joints of the sheet metal parts are eroded by the salt in the water vapor. Compared with vehicles driving in dry inland areas, the strength of their solder joints drops faster. In addition, the welds at positions such as the body pillars and the edges of the doors are vertical, and the space at these parts is narrow, which will limit the line of sight of the inspectors and is not convenient for manual inspection.

[0004] Therefore, a rapid test device for sheet metal solder joints of new energy vehicles is proposed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a rapid test device for sheet metal solder joints of new energy vehicles in view of the above problems.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions: A rapid test device for sheet metal solder joints of new energy vehicles includes a mounting frame and a robotic arm mechanism fixedly connected to the right side of the mounting frame. A PLC controller is fixedly connected to the lower inner wall of the mounting frame, and a first electric push rod is fixedly connected to the left side wall of the mounting frame. It further includes: A mounting seat, the inside of the mounting seat is connected with a second electric push rod through a limiting component, and a test component is fixedly connected to the moving end of the second electric push rod; An ultrasonic probe, electrically connected to the PLC controller, and an electric suction cup is fixedly connected to the lower side wall of the ultrasonic probe through a bracket for detecting the quality of the solder joints after testing; An etching component, arranged on the upper side wall of the mounting seat, for spraying corrosive liquid onto the weld; A positioning component, arranged below the testing component and behind the test board, for finding the position of the weld of the sheet metal part.

[0007] Preferably, the limiting component includes a limiting block slidably arranged inside the mounting seat. A limiting cavity is opened inside the mounting seat. The limiting block is slidably arranged in the limiting cavity and is connected to the left and right inner walls of the limiting cavity through springs. A groove is opened on the upper side wall of the limiting block, and a limiting electric push rod is fixedly connected to the inner wall of the groove. The moving end of the limiting electric push rod is fixedly connected with a rough plate. A rough seat matching the rough plate is fixedly connected to the upper side inner wall of the limiting cavity. A moving frame is fixedly connected to the lower side wall of the limiting block. A moving port matching the moving frame is opened on the lower side wall of the limiting cavity. The lower end of the moving frame extends out of the square port and is connected to the fixed end of the second electric push rod.

[0008] Preferably, the testing component includes a test box fixedly connected to the moving end of the second electric push rod. The moving end of the second electric push rod is connected to the upper side wall of the test box through a pressure sensor. A threaded rod is rotatably connected to the inner wall of the test box. The left and right thread directions of the threaded rod are opposite. A test motor is fixedly connected to the left side wall of the test box. The output end of the test motor is fixedly connected to the left end of the threaded rod. Two thread cylinders are sleeved on the rod wall of the threaded rod. Guide plates are fixedly connected to the lower side walls of the two thread cylinders. A guide port matching the guide plates is opened on the lower side wall of the test box. The lower end of the guide plate extends out of the guide port and is fixedly connected with a horizontal box. A test block is fixedly connected to the inside of the horizontal box through a spring. A trigger switch is fixedly connected to the upper side inner wall of the horizontal box on the left side. The trigger switch is electrically connected to the PLC controller. A bent rod is fixedly connected to the lower side wall of the test block. A through port matching the bent rod is opened on the lower side wall of the horizontal box. The lower end of the bent rod extends out of the horizontal box and is connected to the test board. The lower end of the test board is of an inclined surface structure.

[0009] Preferably, the corrosion component includes a storage box fixedly connected to the upper side wall of the mounting base. A corrosion solution is placed in the storage box. A liquid spraying pipe is fixedly connected to the lower side wall of the test box. A plurality of thin pipes are fixedly communicated with the lower side wall of the liquid spraying pipe. Drainage grooves matching the thin pipes are formed in the side walls of the opposite sides of the two test plates. A conveying pipe is fixedly communicated between the liquid spraying pipe and the storage box, and a control valve is arranged in the conveying pipe. The control valve is electrically connected to the PLC controller. An air supply cylinder is fixedly connected to the upper side wall of the mounting base. An air supply electric push rod is fixedly connected to the upper side wall of the air supply cylinder. The moving end of the air supply electric push rod passes through the air supply cylinder and is fixedly connected to a lifting plate. A telescopic air bag is fixedly connected between the lifting plate and the air supply cylinder. The lower end of the telescopic air bag is communicated with a vertical pipe. A horizontal pipe is communicated with the side wall of the vertical pipe. The lower end of the vertical pipe extends out of the mounting base and is fixedly communicated with a support pipe. A pressure pipe is fixedly communicated between the support pipe and the storage box. Air supply one-way valves are arranged in the horizontal pipes. A pressure sensor is arranged in the storage box, and the pressure sensor is electrically connected to the PLC controller.

[0010] Preferably, the positioning component includes a positioning electric push rod located behind the test plate. The moving end of the positioning electric push rod is fixedly connected to a positioning box. Positioning blocks are connected to the left and right sides of the positioning box through springs. Trigger frames are fixedly connected to the left and right sides of the positioning blocks, and the trigger frames are electrically connected to an external power supply. A trigger plate is embedded in the upper inner wall of the positioning box. The trigger plate is electrically connected to the PLC controller. A fixing plate is fixedly connected to the lower side wall of the positioning block. A fixing port matching the fixing plate is formed in the lower side wall of the positioning box. The lower end of the fixing plate extends out of the fixing port and is fixedly connected to a telescopic cylinder. An inserting ring is fixedly connected to the inner wall of the telescopic cylinder, and an inserting rod is inserted into the inserting ring. The lower end of the inserting rod is fixedly connected to an inserting plate. The lower end of the inserting plate is of a pointed structure. A permanent magnet plate is fixedly connected to the upper end of the inserting rod. A spring is fixedly connected between the permanent magnet plate and the inserting plate. An electromagnetic plate is fixedly connected to the upper inner wall of the telescopic cylinder.

[0011] Preferably, a display cylinder is fixedly connected to the upper side wall of the mounting base. An air conveying pipe is fixedly communicated between the display cylinder and the support pipe. A first electromagnetic one-way valve is arranged in the air conveying pipe. A second electromagnetic one-way valve is arranged in the pressure pipe. A retaining ring is fixedly connected to the inner wall of the display cylinder. A piston plate is placed on the upper side wall of the retaining ring. A reading column is fixedly connected to the upper side wall of the piston plate. A plurality of scales are arranged on the surface of the reading column.

[0012] Preferably, an air discharging pipe is communicated with the right side wall of the display cylinder. A regulating valve is arranged in the air discharging pipe.

[0013] Preferably, an extrusion switch is fixedly connected to the outer wall of the telescopic cylinder, and the extrusion switch is electrically connected to the PLC controller.

[0014] Compared with the existing technology, a rapid testing device for sheet metal welding points of new energy vehicles has the following advantages: By setting the corrosion component, positioning component and testing component, when testing the sheet metal welding points of new energy vehicles, it can simulate the state where the welding points are eroded by the salt in the water vapor by the sea for a long time, and then test the strength of the welding points of the sheet metal parts, thereby improving the comprehensiveness and diversity of the test data.

[0015] By setting the display cylinder, air delivery pipe, first electromagnetic one-way valve, retaining ring, piston plate and reading column, when testing the welding points of the sheet metal parts of new energy vehicles, it can automatically mark the number of unqualified welding points, which is convenient for the operator to record the data subsequently and improves the accuracy of the operator's data recording.

[0016] By setting the air delivery cylinder, air delivery electric push rod, lifting plate, telescopic airbag and vertical pipe, when the testing device is working, it can keep a certain air pressure in the storage box all the time, so that the corrosive liquid can be sprayed onto the sheet metal welding points of new energy vehicles, and at the same time, it can automatically deliver a fixed amount of gas into the display cylinder to ensure the accuracy of the reading column display.

[0017] By setting the positioning component, when testing the tensile strength of the sheet metal welding points of new energy vehicles, it can automatically insert the combined test plate into the position of the middle weld of the two sheet metal parts, without manual control by the operator, which improves the convenience of detecting the welding points of the sheet metal parts. Brief Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of a rapid testing device for sheet metal welding points of new energy vehicles provided by the present invention; Figure 2 is a schematic structural diagram of the limiting component in a rapid testing device for sheet metal welding points of new energy vehicles provided by the present invention; Figure 3 is a schematic internal structure diagram of the horizontal box in a rapid testing device for sheet metal welding points of new energy vehicles provided by the present invention; Figure 4 is a schematic structural diagram of the testing component in a rapid testing device for sheet metal welding points of new energy vehicles provided by the present invention; Figure 5 is a schematic surface structure diagram of the test plate in a rapid testing device for sheet metal welding points of new energy vehicles provided by the present invention; Figure 6 is a schematic position relationship diagram after the test plate and the weld of the sheet metal part are aligned in a rapid testing device for sheet metal welding points of new energy vehicles provided by the present invention; Figure 7 It is a schematic internal structure diagram of an air supply cylinder and a display cylinder in a rapid testing device for sheet metal welding points of new energy vehicles provided by the present invention; Figure 8 It is a schematic internal structure diagram of a positioning box in a rapid testing device for sheet metal welding points of new energy vehicles provided by the present invention; Figure 9 It is a schematic diagram of the positional relationship between a positioning electric push rod and a positioning box in a rapid testing device for sheet metal welding points of new energy vehicles provided by the present invention.

[0019] In the figure: 1 mounting frame, 2 robotic arm mechanism, 3 PLC controller, 4 first electric push rod, 5 mounting seat, 6 ultrasonic probe, 7 electric suction cup, 8 limiting component, 81 limiting block, 82 limiting cavity, 9 limiting electric push rod, 10 rough plate, 11 rough seat, 12 moving frame, 13 testing component, 131 testing box, 132 threaded rod, 14 testing motor, 15 threaded barrel, 16 guiding plate, 17 horizontal box, 18 testing block, 19 trigger switch, 20 bent rod, 21 testing plate, 22 corrosion component, 221 storage box, 222 liquid spraying pipe, 223 conveying pipe, 23 thin pipe, 24 drainage groove, 25 second electric push rod, 26 control valve, 27 air supply cylinder, 28 air supply electric push rod, 29 lifting plate, 30 telescopic airbag, 31 vertical pipe, 32 horizontal pipe, 33 support pipe, 34 pressure pipe, 35 air delivery check valve, 36 extrusion switch, 37 positioning component, 371 positioning electric push rod, 372 positioning box, 38 positioning block, 39 trigger frame, 40 trigger plate, 41 fixing plate, 42 telescopic cylinder, 43 insertion ring, 44 insertion rod, 45 insertion plate, 46 permanent magnet plate, 47 electromagnetic plate, 48 display cylinder, 49 air delivery pipe, 50 first electromagnetic check valve, 51 retaining ring, 52 piston plate, 53 reading column, 54 air release pipe, 55 regulating valve, 56 second electromagnetic check valve. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0021] As Figures 1-9 shown, a rapid testing device for sheet metal welding points of new energy vehicles includes a mounting frame 1 and a robotic arm mechanism 2 fixedly connected to the right side of the mounting frame 1. The lower inner wall of the mounting frame 1 is fixedly connected with a PLC controller 3, and the left side wall of the mounting frame 1 is fixedly connected with a first electric push rod 4. It further includes: The mounting base 5 has a second electric push rod 25 connected inside it through a limiting component 8. The moving end of the second electric push rod 25 is fixedly connected to a testing component 13. The limiting component 8 includes a limiting block 81 slidably arranged inside the mounting base 5. A limiting cavity 82 is formed inside the mounting base 5. The limiting block 81 is slidably arranged in the limiting cavity 82 and is connected to the left and right inner walls of the limiting cavity 82 through springs. A groove is formed on the upper side wall of the limiting block 81, and a limiting electric push rod 9 is fixedly connected to the inner wall of the groove. The moving end of the limiting electric push rod 9 is fixedly connected to a rough plate 10. A rough seat 11 matching the rough plate 10 is fixedly connected to the upper side inner wall of the limiting cavity 82. A moving frame 12 is fixedly connected to the lower side wall of the limiting block 81. A moving port matching the moving frame 12 is formed on the lower side wall of the limiting cavity 82. The lower end of the moving frame 12 extends out of the square port and is connected to the fixed end of the second electric push rod 25, capable of fixing the position of the testing component 13; The testing component 13 includes a testing box 131 fixedly connected to the moving end of the second electric push rod 25. The moving end of the second electric push rod 25 is connected to the upper side wall of the testing box 131 through a pressure sensor. A threaded rod 132 is rotatably connected to the inner wall of the testing box 131. The left and right thread directions of the threaded rod 132 are opposite. A testing motor 14 is fixedly connected to the left side wall of the testing box 131. The output end of the testing motor 14 is fixedly connected to the left end of the threaded rod 132. Two threaded sleeves 15 are threadedly sleeved on the rod wall of the threaded rod 132. The lower side walls of the two threaded sleeves 15 are both fixedly connected to a guiding plate 16. A guiding port matching the guiding plate 16 is formed on the lower side wall of the testing box 131. The lower end of the guiding plate 16 extends out of the guiding port and is fixedly connected to a horizontal box 17. A testing block 18 is fixedly connected inside the horizontal box 17 through a spring. A trigger switch 19 is fixedly connected to the upper side inner wall of the left horizontal box 17. The trigger switch 19 is electrically connected to the PLC controller 3. A bent rod 20 is fixedly connected to the lower side wall of the testing block 18. A through port matching the bent rod 20 is formed on the lower side wall of the horizontal box 17. The lower end of the bent rod 20 extends out of the horizontal box 17 and is connected to a testing plate 21. The lower end of the testing plate 21 is of an inclined surface structure, capable of detecting the tensile strength and shear resistance of the solder joints of two sheet metals; An ultrasonic probe 6, electrically connected to the PLC controller 3. The lower side wall of the ultrasonic probe 6 is fixedly connected to an electric suction cup 7 through a bracket, used for detecting the quality of the solder joints after testing; The corrosion component 22 is arranged on the upper side wall of the mounting base 5 and is used for spraying corrosive liquid at the weld. The corrosion component 22 includes a storage box 221 fixedly connected to the upper side wall of the mounting base 5. A corrosion solution is placed in the storage box 221. A liquid spraying pipe 222 is fixedly connected to the lower side wall of the test box 131. A plurality of thin pipes 23 are fixedly communicated with the lower side wall of the liquid spraying pipe 222. Drainage grooves 24 matching the thin pipes 23 are formed in the side walls of the opposite sides of the two test plates 21. A conveying pipe 223 is fixedly communicated between the liquid spraying pipe 222 and the storage box 221. A control valve 26 is arranged in the conveying pipe 223. The control valve 26 is electrically connected to the PLC controller 3. An air supply cylinder 27 is fixedly connected to the upper side wall of the mounting base 5. An air supply electric push rod 28 is fixedly connected to the upper side wall of the air supply cylinder 27. The moving end of the air supply electric push rod 28 passes through the air supply cylinder 27 and is fixedly connected with a lifting plate 29. A telescopic air bag 30 is fixedly connected between the lifting plate 29 and the air supply cylinder 27. A vertical pipe 31 is communicated with the lower end of the telescopic air bag 30. A horizontal pipe 32 is communicated with the side wall of the vertical pipe 31. The lower end of the vertical pipe 31 extends out of the mounting base 5 and is fixedly communicated with a support pipe 33. A pressure pipe 34 is fixedly communicated between the support pipe 33 and the storage box 221. Air supply one-way valves 35 are arranged in the horizontal pipes 32. A pressure sensor is arranged in the storage box 221, and the pressure sensor is electrically connected to the PLC controller 3. It can simulate the state that the solder joints are eroded by the salt in the water vapor at the seaside for a long time, and then test the strength of the solder joints of the sheet metal parts, thereby improving the comprehensiveness and diversity of the test data; The positioning component 37 is arranged below the testing component 13 and behind the testing board 21, and is used to find the position at the weld of the sheet metal part. The positioning component 37 includes a positioning electric push rod 371 located behind the testing board 21. A positioning box 372 is fixedly connected to the mobile end of the positioning electric push rod 371. Positioning blocks 38 are connected to both the left and right sides of the positioning box 372 through springs. Trigger brackets 39 are fixedly connected to both the left and right sides of the positioning block 38, and the trigger brackets 39 are electrically connected to an external power source. A trigger plate 40 is embedded in the upper inner wall of the positioning box 372, and the trigger plate 40 is electrically connected to the PLC controller 3. A fixing plate 41 is fixedly connected to the lower side wall of the positioning block 38. A fixing port matching the fixing plate 41 is opened on the lower side wall of the positioning box 372. The lower end of the fixing plate 41 extends out of the fixing port and is fixedly connected to a telescopic cylinder 42. An insertion ring 43 is fixedly connected to the inner wall of the telescopic cylinder 42, and an insertion rod 44 is inserted into the insertion ring 43. A lower end of the insertion rod 44 is fixedly connected to an insertion plate 45, and the lower end of the insertion plate 45 is of a pointed structure. An upper end of the insertion rod 44 is fixedly connected to a permanent magnet plate 46. A spring is fixedly connected between the permanent magnet plate 46 and the insertion plate 45. An electromagnetic plate 47 is fixedly connected to the upper inner wall of the telescopic cylinder 42. When testing the tensile strength of the sheet metal welds of new energy vehicles, the combined testing board 21 can be automatically inserted into the position of the middle weld of two sheet metal parts, without the need for manual control by the operator, improving the convenience of sheet metal weld detection.

[0022] A display cylinder 48 is fixedly connected to the upper side wall of the mounting seat 5. The display cylinder 48 and the support pipe 33 are fixedly communicated with the same gas transmission pipe 49. A first electromagnetic one-way valve 50 is arranged in the gas transmission pipe 49. A second electromagnetic one-way valve 56 is arranged in the pressure pipe 34. A retaining ring 51 is fixedly connected to the inner wall of the display cylinder 48. A piston plate 52 is placed on the upper side wall of the retaining ring 51. A reading column 53 is fixedly connected to the upper side wall of the piston plate 52. Multiple scales are arranged on the surface of the reading column 53. When testing the welds of sheet metal parts of new energy vehicles, the number of unqualified welds can be automatically marked, facilitating subsequent data recording by the operator and improving the accuracy of data recording by the operator.

[0023] An air release pipe 54 is communicated with the right side wall of the display cylinder 48. A regulating valve 55 is arranged in the air release pipe 54, and can discharge the gas inside the display cylinder 48.

[0024] An extrusion switch 36 is fixedly connected to the outer wall of the telescopic cylinder 42. The extrusion switch 36 is electrically connected to the PLC controller 3, and can make the telescopic cylinder 42 contact the upper surface of the sheet metal part.

[0025] The operating principle of the present invention is described as follows: Weld the sheet metal parts at the positions such as the body pillars and door edges of new energy vehicles, and then move the mounting seat 5 above the sheet metal parts through the robotic arm mechanism 2, and make the two test plates 21 located on the left and right sides of the sheet metal parts. Then the operator adsorbs the electric suction cup 7 on the side wall of the sheet metal part, aligns the ultrasonic probe 6 with the weld points on the surface of the sheet metal part. Next, the operator sends an electrical signal to the PLC controller 3 through an external control panel. After receiving the electrical signal, the PLC controller 3 first controls the second electric push rod 25 to work, and the second electric push rod 25 will drive the test box 131 and the two test plates 21 to move downward together, so that the test plates 21 are located on the left and right sides of the sheet metal part. Then the PLC controller 3 controls the test motor 14 to work; The test motor 14 is controlled to rotate the threaded rod 132, and through the thread fit, the two threaded cylinders 15 are driven to move towards each other. The threaded cylinders 15 drive the horizontal box 17, the test block 18, the bent rod 20 and the test plate 21 to move towards the sheet metal part through the guide plate 16, so that the left and right sides of the test plate 21 are in contact with the sheet metal part. When one test plate 21 first contacts the sheet metal part and the other test plate 21 does not contact the sheet metal part, a mutual acting force will be generated between the test plate 21 that first contacts the sheet metal part and the sheet metal part. Under the action of the mutual acting force, the test box 131 will drive the second electric push rod 25, the moving frame 12 and the limit block 81 to gradually move towards the sheet metal part until the other test plate 21 contacts the other side of the sheet metal part. When the other test plate 21 contacts the sheet metal part, mutual acting forces will be generated between both test plates 21 and the sheet metal part. Pressure sensors are provided on the side walls of the two test plates 21 close to the sheet metal part. After detecting the extrusion force between the two test plates 21 and the sheet metal part through the pressure sensors, the two pressure sensors will send an electrical signal to the PLC controller 3. After receiving this electrical signal, the PLC controller 3 will control the test motor 14 to stop working. At the same time, the PLC controller 3 will also control the limit electric push rod 9 to drive the rough plate 10 to move upward by a set distance, and through the friction between the rough plate 10 and the rough seat 11, the positions of the limit block 81, the second electric push rod 25, the test box 131 and the test plate 21 are fixed. Then the PLC controller 3 controls the first electric push rod 4 to work reciprocally. The first electric push rod 4 will drive the mounting seat 5, the test box 131, the test plate 21 and the upper half of the two welded sheet metal parts to move left and right. The lower part of the sheet metal part is fixed to the vehicle body and will not move. When the upper half of the two sheet metal parts is pushed to rotate, due to the thickness of the sheet metal part, during the rotation process, the offset of the upper half will cause a tendency of relative movement on the contact surface, thereby generating a shearing force on the solder joint between the two sheet metal parts, and the solder joint is damaged by the shearing force. At the same time, the ultrasonic probe 6 is used to detect the solder joint. When it is detected that the solder joint is damaged, the PLC controller 3 will control the air supply electric push rod 28 to work reciprocally once, and at the same time will also control the first electromagnetic check valve 50 inside the air delivery pipe 49 to open. The air supply electric push rod 28 will control the lifting plate 29 to press down the telescopic airbag 30, so that the gas inside the telescopic airbag 30 is transported to the display cylinder 48 through the vertical pipe 31, the support pipe 33 and the air delivery pipe 49, increasing the air pressure below the piston plate 52. The piston plate 52 will push the reading column 53 to move upward by a scaled distance. At the same time, the PLC controller 3 will also control the external prompting device to work (the prompting device is a buzzer), reminding the operator to detect the solder joint of another sheet metal part; Similarly, when the air pressure sensor inside the storage box 221 detects a decrease in the internal air pressure of the storage box 221, the PLC controller 3 will repeat the above steps and control the second electromagnetic check valve 56 inside the pressure pipe 34 to be energized, so that external gas can be continuously transported into the storage box 221 for storage. And when the air supply electric push rod 28 drives the telescopic airbag 30 to move upward, the air pressure inside the telescopic airbag 30 will decrease, and the external gas will enter the telescopic airbag 30 for storage through the horizontal pipe 32 and the air delivery check valve 35; When the solder joints of the sheet metal parts are not damaged, the PLC controller 3 will control the test motor 14 to work in reverse, separating the two test plates 21 from the sheet metal parts. Then, the PLC controller 3 will control the second electric push rod 25 to drive the test box 131 to move upward by a certain distance, moving the two test plates 21 above the sheet metal parts. Then, the PLC controller 3 controls the test motor 14 to continue working forward, controlling the two test plates 21 to merge together, so that the two test plates 21 are directly above the sheet metal parts. Then, the PLC controller 3 controls the positioning electric push rod 371 to drive the positioning box 372 and the telescopic cylinder 42 to move downward, so that the position of the lower end plane of the telescopic cylinder 42 is lower than the position of the lower end plane of the test plate 21, and the positioning box 372 and the telescopic cylinder 42 are arranged behind the right test plate 21. And after the two test plates 21 are merged, the central axis of the joint between the two merged test plates 21 and the plug board 45 is on the same vertical plane. Then, the PLC controller 3 controls the second electric push rod 25 to drive the test box 131, the positioning box 372, and the telescopic cylinder 42 to move downward together. When the extrusion switch 36 on the side wall of the telescopic cylinder 42 contacts the upper side wall of the sheet metal part, the PLC controller 3 will control the second electric push rod 25 to stop working. At the same time, the PLC controller 3 controls the electromagnetic plate 47 to cut off the power and lose magnetism. Under the action of the spring tension, the permanent magnet plate 46 will drive the plug rod 44 and the plug board 45 to move downward, making the plug board 45 contact the upper surface of the sheet metal part. Then, control the first electric push rod 4 to drive the mounting seat 5, the second electric push rod 25, the test box 131, the positioning box 372, the telescopic cylinder 42, and the plug board 45 to move left and right on the upper surface of the sheet metal part with a gradually increasing amplitude. When the plug board 45 moves and inserts into the weld of the sheet metal part, the weld will exert a resistance on the plug board 45, and the plug board 45 will drive the telescopic cylinder 42, the fixed plate 41, and the positioning block 38 to stop working immediately. However, the positioning box 372 still moves under the push of the first electric push rod 4, so that the positioning block 38 drives the trigger frame 39 to slide relative in the positioning box 372, and the trigger frame 39 and the trigger plate 40 will contact (the distance between the trigger frame 39 and the trigger plate 40 is 0.01 mm). The trigger frame 39 is electrically connected to an external power source, and the trigger plate 40 is electrically connected to the PLC controller 3. When the trigger frame 39 and the trigger plate 40 contact, an electrical signal will be immediately transmitted to the PLC controller 3. After receiving this electrical signal, the PLC controller 3 will immediately control the first electric push rod 4 to stop working. At this time, the lower pointed parts of the two merged test plates 21 will stay at a distance of 0.01 mm from the central axis of the weld (the minimum weld width of the sheet metal parts of new energy vehicles is 0.1 - 2 mm). Then, the PLC controller 3 controls the second electric push rod 25 to drive the lower pointed parts of the merged test plates 21 to insert into the weld. Then, the PLC controller 3 controls the test motor 14 to work in reverse for 0.In 5 seconds, referring to the above principle, the two test plates 21 will move one centimeter away from each other to tear the weld of the sheet metal part. At this time, the ultrasonic probe 6 is still used to detect the quality of the solder joints. When problems are detected, the above steps will be repeated. The reading column 53 will be controlled to move upward by a calibrated distance, and at the same time, the external prompting device (the prompting device is a buzzer) will be controlled to work to remind the operator to detect the solder joints of another sheet metal part. When the detection result is okay, the PLC controller 3 will control the control valve 26 to open for two seconds, so that the corrosion solution inside the storage box 221 (the solution is an acetate salt spray solution, composition: on the basis of a 5% sodium chloride solution, an appropriate amount of glacial acetic acid is added to lower the pH value of the solution to about 3, forming an acidic salt spray environment, corrosion principle: in addition to the corrosion effect of chloride ions, the acidic environment will further exacerbate the corrosion of metals because metals are more likely to lose electrons and undergo oxidation reactions under acidic conditions) is used to corrode the solder joints for one hour. Then the PLC controller 3 will repeat the above detection steps to detect the strength of the solder joints, simulate the state where the solder joints are eroded by the salt in the water vapor by the sea for a long time, and then test the strength of the solder joints of the sheet metal part, thereby improving the comprehensiveness and diversity of the test data.

[0026] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A rapid testing device for sheet metal welding points of new energy vehicles, comprising a mounting frame (1) and a mechanical arm mechanism (2) fixedly connected to the right side of the mounting frame (1), a PLC controller (3) fixedly connected to the lower inner wall of the mounting frame (1), and a first electric push rod (4) fixedly connected to the left side wall of the mounting frame (1), characterized in that: Also includes: A mounting seat (5), wherein a second electric push rod (25) is connected to the interior of the mounting seat (5) via a limit assembly (8), and a moving end of the second electric push rod (25) is fixedly connected to a testing assembly (13); An ultrasonic probe (6) is electrically connected to the PLC controller (3); a lower side wall of the ultrasonic probe (6) is fixedly connected to an electric suction cup (7) via a bracket, and is used to detect the quality of the welding point after the test; A corrosion component (22) is arranged on the upper side wall of the mounting seat (5) and is used to spray a corrosive liquid onto the weld; The positioning assembly (37) is arranged below the test assembly (13) and behind the test plate (21), and is used to find the position of the weld of the sheet metal part.

2. A rapid testing device for sheet metal welding points of new energy vehicles according to claim 1, characterized in that: The limit assembly (8) comprises a limit block (81) slidably arranged inside the mounting seat (5); a limit cavity (82) is provided inside the mounting seat (5); the limit block (81) is slidably arranged inside the limit cavity (82) and is connected to the inner walls of the limit cavity (82) on the left and right sides via a spring; the upper side wall of the limit block (81) is provided with a groove, and the inner wall of the groove is fixedly connected to a limit electric push rod (9); the movable end of the limit electric push rod (9) is fixedly connected to a rough plate (10); the upper inner wall of the limit cavity (82) is fixedly connected to a rough seat (11) matching the rough plate (10); the lower side wall of the limit block (81) is fixedly connected to a movable frame (12); the lower side wall of the limit cavity (82) is provided with a movable opening matching the movable frame (12); the lower end of the movable frame (12) extends out of a square opening and is connected to the fixed end of the second electric push rod (25).

3. A rapid testing device for sheet metal welding points of new energy vehicles according to claim 1, characterized in that: The test assembly (13) comprises a test box (131) fixedly connected to the moving end of the second electric push rod (25); the moving end of the second electric push rod (25) is connected to the upper side wall of the test box (131) via a pressure sensor; a threaded rod (132) is rotatably connected to the inner wall of the test box (131); the threads on the left and right sides of the threaded rod (132) are in opposite directions; a test motor (14) is fixedly connected to the left side wall of the test box (131); the output end of the test motor (14) is fixedly connected to the left end of the threaded rod (132); two threaded barrels (15) are threadedly sleeved on the rod wall of the threaded rod (132); the lower side walls of the two threaded barrels (15) are fixedly connected to guide plates (16); and the test box The lower side wall of the (131) is provided with a guide opening that matches the guide plate (16); the lower end of the guide plate (16) extends out of the guide opening and is fixedly connected to a horizontal box (17); a test block (18) is fixedly connected to the interior of the horizontal box (17) via a spring; a trigger switch (19) is fixedly connected to the upper inner wall of the horizontal box (17) on the left side; the trigger switch (19) is electrically connected to the PLC controller (3); a bent rod (20) is fixedly connected to the lower side wall of the test block (18); a through opening that matches the bent rod (20) is provided on the lower side wall of the horizontal box (17); the lower end of the bent rod (20) extends out of the horizontal box (17) and is connected to the test plate (21); the lower end of the test plate (21) is an inclined structure.

4. A rapid testing device for sheet metal welding points of new energy vehicles according to claim 3, characterized in that: The corrosion assembly (22) comprises a storage box (221) fixedly connected to the upper side wall of the mounting seat (5), wherein the corrosion solution is placed in the storage box (221), a liquid spraying pipe (222) is fixedly connected to the lower side wall of the test box (131), and the lower side wall of the liquid spraying pipe (222) is fixedly connected to a plurality of thin tubes (23), and the side walls on the opposite sides of the two test plates (21) are provided with drainage grooves (24) that match the thin tubes (23), the liquid spraying pipe (222) and the storage box (221) are fixedly connected to the same delivery pipe (223), and a control valve (26) is provided in the delivery pipe (223), and the control valve (26) is electrically connected to the PLC controller (3), and an air supply cylinder (27) is fixedly connected to the upper side wall of the mounting seat (5), and the air supply cylinder (27) is The upper side wall is fixedly connected to an air supply electric push rod (28), the movable end of the air supply electric push rod (28) passes through the air supply cylinder (27) and is fixedly connected to a lifting plate (29), a same telescopic air bag (30) is fixedly connected between the lifting plate (29) and the air supply cylinder (27), the lower end of the telescopic air bag (30) is connected to a vertical pipe (31), the side wall of the vertical pipe (31) is connected to a horizontal pipe (32), the lower end of the vertical pipe (31) extends out of the mounting seat (5) and is fixedly connected to a support pipe (33), the support pipe (33) and the storage box (221) are fixedly connected to a same pressurizing pipe (34), a gas supply check valve (35) is provided in each of the horizontal pipes (32), an air pressure sensor is provided in the storage box (221), and the air pressure sensor is electrically connected to the PLC controller (3).

5. A rapid testing device for sheet metal welding points of new energy vehicles according to claim 3, characterized in that: The positioning assembly (37) comprises a positioning electric push rod (371) located behind the test plate (21); the movable end of the positioning electric push rod (371) is fixedly connected to a positioning box (372); the left and right sides of the positioning box (372) are both connected to positioning blocks (38) via springs; the left and right sides of the positioning block (38) are both fixedly connected to trigger racks (39); and the trigger racks (39) are electrically connected to an external power supply; the upper inner wall of the positioning box (372) is inlaid with a trigger plate (40); the trigger plate (40) is electrically connected to a PLC controller (3); the lower side wall of the positioning block (38) is fixedly connected to a fixing plate (41); The lower side wall of the box (372) is provided with a fixing opening that matches the fixing plate (41); the lower end of the fixing plate (41) extends out of the fixing opening and is fixedly connected to a telescopic cylinder (42); an insert ring (43) is fixedly connected to the inner wall of the telescopic cylinder (42); an insert rod (44) is inserted into the insert ring (43); the lower end of the insert rod (44) is fixedly connected to an insert plate (45); the lower end of the insert plate (45) is a tip structure; the upper end of the insert rod (44) is fixedly connected to a permanent magnetic plate (46); a same spring is fixedly connected between the permanent magnetic plate (46) and the insert plate (45); and the upper inner wall of the telescopic cylinder (42) is fixedly connected to an electromagnetic plate (47).

6. A rapid testing device for sheet metal welding points of new energy vehicles according to claim 4, characterized in that: A display tube (48) is fixedly connected to the upper side wall of the mounting seat (5); a same gas supply pipe (49) is fixedly connected between the display tube (48) and the support tube (33); a first electromagnetic one-way valve (50) is provided in the gas supply pipe (49); a second electromagnetic one-way valve (56) is provided in the pressurizing tube (34); a retaining ring (51) is fixedly connected to the inner wall of the display tube (48); a piston plate (52) is placed on the upper side wall of the retaining ring (51); a reading column (53) is fixedly connected to the upper side wall of the piston plate (52); and a surface of the reading column (53) is provided with a plurality of scales.

7. A rapid testing device for sheet metal welding points of new energy vehicles according to claim 6, characterized in that: The right side wall of the display tube (48) is connected to an air release pipe (54), and a regulating valve (55) is provided in the air release pipe (54).

8. A rapid testing device for sheet metal welding points of new energy vehicles according to claim 5, characterized in that: An extrusion switch (36) is fixedly connected to the outer wall of the telescopic cylinder (42), and the extrusion switch (36) is electrically connected to the PLC controller (3).

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