A rapid testing device for sheet metal welds in new energy vehicles

Abstract

The present invention belongs to the technical field of sheet metal weld detection technology, and in particular relates to a rapid testing device for sheet metal welds in new energy vehicles, comprising a mounting frame and a robotic arm mechanism fixedly connected to the right side of the mounting frame, a PLC controller fixedly connected to the lower inner wall of the mounting frame, and a first electric push rod fixedly connected to the left side wall of the mounting frame. When testing sheet metal welds in new energy vehicles, the present invention can simulate the state of the welds being corroded by salt in water vapor at the seaside for a long time, and then test the weld strength of the sheet metal parts, thereby improving the comprehensiveness and diversity of the test data; and can automatically mark the number of unqualified welds, making it easier for operators to record the data later, thereby improving the accuracy of the operator's recorded data.

Description

Technical Field

[0001] The present invention belongs to the technical field of sheet metal welding spot detection, and in particular relates to a rapid testing device for sheet metal welding spots of new energy vehicles. Background Art

[0002] The body structure of energy vehicles is mostly made of sheet metal parts connected by welding. The quality of welds is the key part connecting various sheet metal components. It is directly related to the overall structural strength of the body. If there are defects in the welds, such as cold welds, leaking welds, insufficient welding strength, etc., during the vehicle driving process, especially when encountering external forces such as bumps and collisions, the connection between the body sheet metal parts may loosen or break, thereby affecting the overall structural integrity of the vehicle and failing to effectively protect the lives of passengers in the vehicle. For example, a vehicle sheet metal weld detection device is proposed in patent announcement 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. They 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, which has led to an increasing number of new energy vehicles in coastal cities. New energy vehicles that have been driven on the seaside for a long time have their sheet metal welds corroded by salt in the water vapor. Compared with cars driven in dry inland areas, their weld strength decreases faster. The existing testing equipment lacks the ability to test sheet metal welds in a corroded state, and the test data is not comprehensive. In addition, the welds at positions such as body pillars and door edges are vertical, and the space in these positions is narrow, which will limit the inspectors' line of sight and make manual inspection inconvenient.

[0004] To this end, a rapid testing device for sheet metal welds 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 testing device for sheet metal welds of new energy vehicles in order to solve the above problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solutions: a rapid testing device for sheet metal welds of new energy vehicles, comprising a mounting frame and a robotic arm mechanism fixedly connected to the right side of the mounting frame, a PLC controller fixedly connected to the lower inner wall of the mounting frame, and a first electric push rod fixedly connected to the left side wall of the mounting frame, and further comprising:

[0007] A mounting seat, wherein a second electric push rod is connected to the interior of the mounting seat via a limit assembly, and a movable end of the second electric push rod is fixedly connected to a test assembly;

[0008] An ultrasonic probe is 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, and is used to detect the quality of the solder joint after the test;

[0009] A corrosion assembly is provided on the upper side wall of the mounting seat and is used to spray corrosive liquid onto the weld;

[0010] The positioning component is arranged below the test component and behind the test plate, and is used to find the position of the weld of the sheet metal part.

[0011] Preferably, the limit assembly includes a limit block slidably arranged inside the mounting seat, a limit cavity is provided inside the mounting seat, the limit block is slidably arranged in the limit cavity, and is connected to the left and right inner walls of the limit cavity through a spring, the upper side wall of the limit block is provided with a groove, and the inner wall of the groove is fixedly connected to the limit electric push rod, the movable end of the limit electric push rod is fixedly connected to a rough plate, the upper inner wall of the limit cavity is fixedly connected to a rough seat matching the rough plate, the lower side wall of the limit block is fixedly connected to a movable frame, the lower side wall of the limit cavity is provided with a movable opening matching the movable frame, the lower end of the movable frame extends out of the square opening, and is connected to the fixed end of the second electric push rod.

[0012] Preferably, the test assembly includes a test box fixedly connected to the movable end of the second electric push rod, the movable end of the second electric push rod is connected to the upper side wall of the test box through a pressure sensor, the inner wall of the test box is rotatably connected to a threaded rod, the threads on the left and right sides of the threaded rod are in opposite directions, the left side wall of the test box is fixedly connected to a test motor, the output end of the test motor is fixedly connected to the left end of the threaded rod, the rod wall of the threaded rod is threadedly sleeved with two threaded barrels, the lower side walls of the two threaded barrels are fixedly connected to a guide plate, the lower side wall of the test box is provided with a guide opening that matches the guide plate, the lower end of the guide plate extends out of the guide opening and is fixedly connected to a horizontal box, the interior of the horizontal box is fixedly connected to a test block by a spring, the upper inner wall of the horizontal box on the left is fixedly connected to a trigger switch, the trigger switch is electrically connected to a PLC controller, the lower side wall of the test block is fixedly connected to a bent rod, the lower side wall of the horizontal box is provided with a through opening that matches the bent rod, the lower end of the bent rod extends out of the horizontal box and is connected to the test board, and the lower end of the test board is an inclined structure.

[0013] Preferably, the corrosion assembly includes a storage box fixedly connected to the upper side wall of the mounting base, wherein the corrosion solution is placed in the storage box, the lower side wall of the test box is fixedly connected to a liquid spray pipe, the lower side wall of the liquid spray pipe is fixedly connected to a plurality of fine tubes, the side walls on the opposite sides of the two test plates are provided with drainage grooves that match the fine tubes, the liquid spray pipe and the storage box are fixedly connected to the same delivery pipe, and a control valve is provided in the delivery pipe, the control valve is electrically connected to the PLC controller, the upper side wall of the mounting base is fixedly connected to an air supply cylinder, the upper side of the air supply cylinder is fixedly connected to the upper side of the air supply cylinder. An air supply electric push rod is fixedly connected to the side wall, the movable end of the air supply electric push rod passes through the air supply cylinder and is fixedly connected to a lifting plate, a same telescopic air bag is fixedly connected between the lifting plate and the air supply cylinder, the lower end of the telescopic air bag is connected to a vertical pipe, the side wall of the vertical pipe is connected to a horizontal pipe, the lower end of the vertical pipe extends out of the mounting seat and is fixedly connected to a support pipe, the support pipe and the storage box are fixedly connected to the same pressurized pipe, a gas supply one-way valve is provided in the horizontal pipe, an air pressure sensor is provided in the storage box, and the air pressure sensor and the PLC controller are electrically connected.

[0014] Preferably, the positioning assembly includes a positioning electric push rod located behind the test plate, the moving end of the positioning electric push rod is fixedly connected to the positioning box, the left and right sides of the positioning box are connected to positioning blocks by a spring, the left and right sides of the positioning block are fixedly connected to a trigger frame, and the trigger frame is electrically connected to an external power supply, the upper inner wall of the positioning box is inlaid with a trigger plate, the trigger plate is electrically connected to the PLC controller, the lower side wall of the positioning block is fixedly connected to a fixing plate, the lower side wall of the positioning box is provided with a fixing opening that matches the fixing plate, the lower end of the fixing plate extends out of the fixing opening and is fixedly connected to a telescopic cylinder, the inner wall of the telescopic cylinder is fixedly connected to a plug ring, and a plug rod is plugged into the plug ring, the lower end of the plug rod is fixedly connected to the plug plate, the lower end of the plug plate is a pointed structure, the upper end of the plug rod is fixedly connected to a permanent magnet plate, the same spring is fixedly connected between the permanent magnet plate and the plug plate, and the upper inner wall of the telescopic cylinder is fixedly connected to an electromagnetic plate.

[0015] Preferably, the upper side wall of the mounting seat is fixedly connected with a display tube, the display tube and the support tube are fixedly connected with the same gas pipe, a first electromagnetic one-way valve is provided in the gas pipe, a second electromagnetic one-way valve is provided in the pressurized tube, the inner wall of the display tube is fixedly connected with a retaining ring, 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, and a plurality of scales are provided on the surface of the reading column.

[0016] Preferably, the right side wall of the display tube is connected to an air vent pipe, and a regulating valve is provided in the air vent pipe.

[0017] 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.

[0018] Compared with existing technologies, the advantages of a rapid testing device for sheet metal welds of new energy vehicles are:

[0019] By setting up corrosion components, positioning components and testing components, when testing the sheet metal welds of new energy vehicles, it is possible to simulate the state of the welds being corroded by salt in water vapor at the seaside for a long time, and then test the weld strength of the sheet metal parts, thereby improving the comprehensiveness and diversity of the test data.

[0020] By setting up the display tube, gas pipe, first electromagnetic one-way valve, retaining ring, piston plate, and reading column, when testing the welds of new energy vehicle sheet metal parts, the number of unqualified welds can be automatically marked, which is convenient for the operator to record the data later and improves the accuracy of the operator's recorded data.

[0021] By setting up the air supply cylinder, air supply electric push rod, lifting plate, telescopic airbag and vertical pipe, when the test device is working, a certain air pressure can always be maintained in the storage box, so that the corrosive liquid can be sprayed onto the sheet metal welding points of the new energy vehicle. At the same time, a certain amount of gas can be automatically delivered to the display cylinder to ensure the accuracy of the reading column display.

[0022] Through the positioning component, when testing the tensile strength of the sheet metal welds of new energy vehicles, the merged test plate can be automatically inserted into the position of the middle weld between the two sheet metal parts, without the need for manual control by the operator, thereby improving the convenience of sheet metal weld detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural schematic diagram of a rapid testing device for sheet metal welds of new energy vehicles provided by the present invention;

[0024] Figure 2 This is a structural schematic diagram of a limit assembly in a rapid testing device for sheet metal welds of new energy vehicles provided by the present invention;

[0025] Figure 3 This is a schematic diagram of the internal structure of a horizontal box in a rapid testing device for sheet metal welds of new energy vehicles provided by the present invention;

[0026] Figure 4 This is a structural schematic diagram of a test component in a rapid testing device for sheet metal welds of new energy vehicles provided by the present invention;

[0027] Figure 5 This is a schematic diagram of the surface structure of a test plate used in a rapid testing device for sheet metal welds of new energy vehicles provided by the present invention;

[0028] Figure 6 This is a schematic diagram of the positional relationship between a test plate and a sheet metal weld after alignment in a rapid testing device for sheet metal welds of new energy vehicles provided by the present invention;

[0029] Figure 7 This is a schematic diagram of the internal structure of an air supply cylinder and a display cylinder in a rapid testing device for sheet metal welds of new energy vehicles provided by the present invention;

[0030] Figure 8 This is a schematic diagram of the internal structure of a positioning box in a rapid testing device for sheet metal welds of new energy vehicles provided by the present invention;

[0031] Figure 9 The present invention provides 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 welds of new energy vehicles.

[0032] 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 limit assembly, 81 limit block, 82 limit cavity, 9 limit electric push rod, 10 rough plate, 11 rough seat, 12 moving frame, 13 test assembly, 131 test box, 132 threaded rod, 14 test motor, 15 threaded barrel, 16 guide plate, 17 horizontal box, 18 test block, 19 trigger switch, 20 bending rod, 21 test plate, 22 corrosion assembly, 221 storage box, 222 spray pipe, 223 delivery pipe, 23 thin tube, 24 drainage trough, 25 second electric push rod, 26 Control valve, 27 air supply cylinder, 28 air supply electric push rod, 29 lifting plate, 30 telescopic air bag, 31 vertical pipe, 32 horizontal pipe, 33 support pipe, 34 pressurizing pipe, 35 air supply one-way valve, 36 extrusion switch, 37 positioning assembly, 371 positioning electric push rod, 372 positioning box, 38 positioning block, 39 trigger frame, 40 trigger plate, 41 fixing plate, 42 telescopic cylinder, 43 plug ring, 44 plug rod, 45 plug plate, 46 permanent magnet plate, 47 electromagnetic plate, 48 display tube, 49 air supply pipe, 50 first electromagnetic one-way valve, 51 retaining ring, 52 piston plate, 53 reading column, 54 vent pipe, 55 control valve, 56 second electromagnetic one-way valve. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] like Figures 1-9As shown, a rapid testing device for sheet metal welds 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, 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, and further includes:

[0035] The mounting seat 5 is connected to the second electric push rod 25 inside the mounting seat 5 through the limit assembly 8, and the moving end of the second electric push rod 25 is fixedly connected to the test assembly 13. The limit assembly 8 includes 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 in the limit cavity 82 and is connected to the left and right inner walls of the limit cavity 82 through 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 the limit electric push rod 9. The moving end of the limit electric push rod 9 is fixedly connected to the rough plate 10. The upper inner wall of the limit cavity 82 is fixedly connected with a rough seat 11 that matches the rough plate 10. The lower side wall of the limit block 81 is fixedly connected to the moving frame 12. The lower side wall of the limit cavity 82 is provided with a moving opening that matches the moving frame 12. The lower end of the moving frame 12 extends out of the square opening and is connected to the fixed end of the second electric push rod 25, so as to fix the position of the test assembly 13.

[0036] The test assembly 13 includes 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 through a pressure sensor. The inner wall of the test box 131 is rotatably connected to a threaded rod 132. The left and right sides of the threaded rod 132 have opposite threads. The left side wall of the test box 131 is fixedly connected to a test motor 14. The output end of the test motor 14 is fixedly connected to the left end of the threaded rod 132. The rod wall of the threaded rod 132 is threadedly sleeved with two threaded barrels 15. The lower side walls of the two threaded barrels 15 are fixedly connected to guide plates 16. The lower side wall of the test box 131 is provided with a guide plate. The guide openings of the guide plate 16 match each other, and 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 inside of the horizontal box 17 through a spring. A trigger switch 19 is fixedly connected to the upper inner wall of the left horizontal box 17. The trigger switch 19 is electrically connected to the PLC controller 3. A bending rod 20 is fixedly connected to the lower side wall of the test block 18. The lower side wall of the horizontal box 17 is provided with a through opening that matches the bending rod 20. The lower end of the bending 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 a sloped structure, which can detect the tensile strength and shear resistance of the welds of the two sheet metal parts.

[0037] The ultrasonic probe 6 is 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 for detecting the quality of the solder joint after the test;

[0038] The corrosion component 22 is arranged on the upper side wall of the mounting base 5 and is used to spray corrosive liquid onto the weld. The corrosion component 22 includes a storage box 221 fixedly connected to the upper side wall of the mounting base 5. The corrosion solution is placed in the storage box 221. The lower side wall of the test box 131 is fixedly connected to a liquid spraying pipe 222. The lower side wall of the liquid spraying pipe 222 is fixedly connected to a plurality of fine tubes 23. The side walls on the opposite sides of the two test plates 21 are provided with drainage grooves 24 that match the fine tubes 23. The liquid spraying pipe 222 and the storage box 221 are fixedly connected with the same delivery pipe 223, and a control valve 26 is provided in the delivery pipe 223. The control valve 26 is electrically connected to the PLC controller 3. The upper side wall of the mounting base 5 is fixedly connected to an air supply cylinder 27, and the upper side wall of the air supply cylinder 27 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 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 the same pressurized pipe 34. A gas supply check valve 35 is provided in the horizontal pipe 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. This can simulate the state of the weld being corroded by salt in water vapor at the seaside for a long time, and then the weld strength of the sheet metal parts can be tested, thereby improving the comprehensiveness and diversity of the test data;

[0039] 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 sheet metal weld; the positioning assembly 37 includes a positioning electric push rod 371 located behind the test plate 21, and the moving end of the positioning electric push rod 371 is fixedly connected to the positioning box 372, and the left and right sides of the positioning box 372 are connected to the positioning blocks 38 by springs, and the left and right sides of the positioning block 38 are fixedly connected to the trigger frame 39, and the trigger frame 39 is electrically connected to the external power supply, and the upper inner wall of the positioning box 372 is inlaid with a trigger plate 40, and the trigger plate 40 is electrically connected to the PLC controller 3, and the lower side wall of the positioning block 38 is fixedly connected to the fixed plate 41, and the lower side wall of the positioning box 372 is provided with a fixed plate 41. The fixed openings match each other, and the lower end of the fixed plate 41 extends out of the fixed opening and is fixedly connected to a telescopic cylinder 42. The inner wall of the telescopic cylinder 42 is fixedly connected to an insert ring 43, and an insert rod 44 is inserted in 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 pointed structure, and the upper end of the insert rod 44 is fixedly connected to a permanent magnet plate 46. The same spring is fixedly connected between the permanent magnet plate 46 and the insert plate 45. The upper inner wall of the telescopic cylinder 42 is fixedly connected to an electromagnetic plate 47. When testing the tensile strength of the sheet metal welds of new energy vehicles, the merged test plate 21 can be automatically inserted into the position of the middle weld of the two sheet metal parts, without the need for manual control by the operator, thereby improving the convenience of detecting the welds of the sheet metal parts.

[0040] The upper side wall of the mounting base 5 is fixedly connected with a display tube 48, and the display tube 48 and the support tube 33 are fixedly connected with the same gas pipe 49, a first electromagnetic one-way valve 50 is provided in the gas pipe 49, and a second electromagnetic one-way valve 56 is provided in the pressurizing tube 34. The inner wall of the display tube 48 is fixedly connected with a retaining ring 51, and a piston plate 52 is placed on the upper side wall of the retaining ring 51. The upper side wall of the piston plate 52 is fixedly connected with a reading column 53, and the surface of the reading column 53 is provided with multiple scales. When testing the welds of sheet metal parts of new energy vehicles, the number of unqualified welds can be automatically marked, which is convenient for the operator to record the data later and improves the accuracy of the operator's recorded data.

[0041] The right side wall of the display tube 48 is connected to a vent pipe 54 , and a regulating valve 55 is provided in the vent pipe 54 to discharge the gas inside the display tube 48 .

[0042] The outer wall of the telescopic cylinder 42 is fixedly connected with a squeeze switch 36 . The squeeze switch 36 is electrically connected to the PLC controller 3 , and can make the telescopic cylinder 42 contact with the upper surface of the sheet metal part.

[0043] The operating principle of the present invention is now explained as follows: the sheet metal parts at positions such as the body pillars and door edges of the new energy vehicle are welded, and then the mounting base 5 is moved to the top of the sheet metal part by the robotic arm mechanism 2, and the two test plates 21 are located on the left and right sides of the sheet metal part, and the operator adsorbs the electric suction cup 7 on the side wall of the sheet metal part to align the ultrasonic probe 6 with the welding points on the surface of the sheet metal part, and then the operator transmits an electrical signal to the PLC controller 3 through the control panel of the peripheral device. 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, and then the PLC controller 3 controls the test motor 14 to work;

[0044] The test motor 14 controls the rotation of the threaded rod 132, and drives the two threaded cylinders 15 to move toward each other through the threaded cooperation. The threaded cylinder 15 drives the cross box 17, the test block 18, the bent rod 20 and the test plate 21 to move toward the sheet metal through the guide plate 16, so that the test plate 21 contacts the left and right sides of the sheet metal. When the test plate 21 on one side contacts the sheet metal first, and the other test plate 21 does not contact the sheet metal, the test plate 21 that contacts the sheet metal first will generate an interaction force with the sheet metal. Under the action of the interaction force, the test box 131 will drive the second electric push rod 25, the movable frame 12, and the limit block 81 to gradually move toward the sheet metal. , until the other test plate 21 contacts the other side of the sheet metal. When the other test plate 21 contacts the sheet metal, the two test plates 21 will generate an interaction force with the sheet metal. The two test plates 21 are provided with pressure sensors near the side walls of the sheet metal. After the pressure sensors detect the extrusion force between the two test plates 21 and the sheet metal, the two pressure sensors will send an electrical signal to the PLC controller 3. After receiving the 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 a set distance. Through the friction between the rough plate 10 and the rough seat 11 Friction is used to fix the positions of the limit block 81, the second electric push rod 25, the test box 131 and the test plate 21. Then the PLC controller 3 controls the first electric push rod 4 to work reciprocatingly. The first electric push rod 4 will drive the mounting base 5, the test box 131, the test plate 21 and the upper half of the two welded sheet metal parts to deviate left and right. The lower part of the sheet metal parts is fixed to the vehicle body and will not move. When the upper half of the two sheet metal parts are pushed to rotate, due to the thickness of the sheet metal parts, the deviation of the upper half will cause a tendency of relative movement on the contact surface during the rotation process, thereby generating a shear force on the weld between the two sheet metal parts, which is destroyed by the shear force. At the same time, ultrasonic detection is used The head 6 detects the welding point. When the detection finds that the welding point is damaged, the PLC controller 3 will control the air supply electric push rod 28 to reciprocate once, and at the same time control the first electromagnetic one-way valve 50 inside the air supply pipe 49 to open. The air supply electric push rod 28 will control the lifting plate 29 to press down the telescopic air bag 30, so that the gas inside the telescopic air bag 30 is transported to the display tube 48 through the vertical pipe 31, the support pipe 33 and the air supply pipe 49, so that the air pressure under the piston plate 52 increases, and the piston plate 52 pushes the reading column 53 to move the scale distance upward. At the same time, the PLC controller 3 will also control the external prompt device to work (the prompt device is a buzzer) to remind the operator to test another sheet metal welding point;

[0045] Similarly, when the air pressure sensor inside the storage box 221 detects that the air pressure inside the storage box 221 decreases, the PLC controller 3 will repeat the above steps and control the second electromagnetic one-way valve 56 inside the pressurizing pipe 34 to be energized, so that external air can be continuously supplied to the storage box 221 for storage. 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 air will enter the telescopic airbag 30 through the cross pipe 32 and the air supply one-way valve 35 for storage.

[0046] When the sheet metal welding point is not damaged, the PLC controller 3 will control the test motor 14 to work in the reverse direction to separate the two test plates 21 from the sheet metal. Then the PLC controller 3 will control the second electric push rod 25 to drive the test box 131 to move upward a certain distance, so that the two test plates 21 are moved above the sheet metal. Then the PLC controller 3 controls the test motor 14 to continue to work in the forward direction, controlling the two test plates 21 to merge together so that the two test plates 21 are directly above the sheet metal. 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 joint of the two test plates 21 and the central axis of the plug plate 45 are on the same vertical plane, and 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, the PLC controller 3 will control the second electric push rod 25 to stop working, and at the same time, the PLC controller 3 controls the electromagnetic plate 47 to cut off the power and lose the magnetic force. Under the action of the spring tension, the permanent magnet plate 46 will drive the plug rod 44 and the plug plate 45 to move downward, so that the plug plate 45 and the sheet metal are aligned. The upper surface is in contact, and then the first electric push rod 4 is controlled to move with a gradually increasing amplitude, driving the mounting seat 5, the second electric push rod 25, the test box 131, the positioning box 372, the telescopic cylinder 42 and the insert plate 45 to move left and right on the upper surface of the sheet metal. When the insert plate 45 moves and inserts into the weld of the sheet metal, the weld will apply a resistance to the insert plate 45, and the insert plate 45 will drive the telescopic cylinder 42, the fixed plate 41, and the positioning block 38 to stop working immediately, while the positioning box 372 continues to move under the push of the first electric push rod 4, so that the positioning block 38 drives the trigger frame 39 to slide relatively 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 0.01mm ), the trigger frame 39 is electrically connected to the external power supply, and the trigger plate 40 is electrically connected to the PLC controller 3. When the trigger frame 39 and the trigger plate 40 are in contact, an electrical signal is immediately transmitted to the PLC controller 3. After receiving the electrical signal, the PLC controller 3 immediately controls the first electric push rod 4 to stop working. At this time, the lower end tips of the two combined test plates 21 will be at a distance of 0.01mm offset from the center axis of the weld (the minimum weld width of the sheet metal parts of new energy vehicles is 0.1-2mm). Then the PLC controller 3 controls the second electric push rod 25 to drive the lower end tip of the combined test plate 21 into the weld, and then the PLC controller 3 controls the test motor 14 to work in the reverse direction 0.5 seconds, referring to the above principle, the two test plates 21 will move one centimeter away from each other, thereby tearing the weld of the sheet metal. At this time, the quality of the weld will continue to be tested by the ultrasonic probe 6. When a problem is found during the test, the above steps will be repeated to control the reading column 53 to move upward by the distance of the scale. At the same time, the external prompt device will be controlled to work (the prompt device is a buzzer) to remind the operator to test another weld of the sheet metal. When the test result is no problem, the PLC controller 3 will control the control valve 26 to open for two seconds to allow the corrosive solution (the solution is an acetate mist solution) inside the storage box 221 to be discharged. Ingredients: Add an appropriate amount of glacial acetic acid to a 5% sodium chloride solution to lower the solution's pH to around 3, creating an acidic salt spray environment. Corrosion Principle: In addition to the corrosive effects of chloride ions, an acidic environment further exacerbates metal corrosion because metals are more likely to lose electrons and undergo oxidation under acidic conditions. After the solution corrodes the solder joints for one hour, PLC controller 3 repeats the above test steps to test the solder joint strength, simulating the condition of long-term exposure to salt corrosion in seaside water vapor. The strength of the sheet metal solder joints is then tested, thereby improving the comprehensiveness and diversity of the test data.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rapid testing device for sheet metal welds 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 the interior of the mounting seat (5) is connected to a second electric push rod (25) via a limit assembly (8), and a movable end of the second electric push rod (25) is fixedly connected to a test assembly (13); An ultrasonic probe (6) is electrically connected to the PLC controller (3), and an electric suction cup (7) is fixedly connected to the lower side wall of the ultrasonic probe (6) via a bracket for detecting the quality of the solder joint after the test; A corrosion assembly (22) is arranged on the upper side wall of the mounting seat (5) and is used to spray corrosive liquid onto the weld; A 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. The test assembly (13) includes a test box (131) fixedly connected to the moving end of the second electric push rod (25), and the corrosion assembly (22) includes a storage box (221) fixedly connected to the upper side wall of the mounting seat (5). The storage box (221) contains a corrosion solution. The lower side wall of the test box (131) is fixedly connected to a spray pipe (222), and the lower side wall of the spray pipe (222) is fixedly connected to a plurality of thin tubes (23). The side walls on the opposite side of the two test plates (21) are each provided with a drainage groove (24) that matches the thin tubes (23).

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

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

4. A rapid testing device for sheet metal welds of new energy vehicles according to claim 1, characterized in that: The liquid spraying pipe (222) and the storage box (221) are fixedly connected to each other via a same delivery pipe (223), and a control valve (26) is provided in the delivery pipe (223). The control valve (26) is electrically connected to the PLC controller (3). The upper side wall of the mounting seat (5) is fixedly connected to an air supply cylinder (27), and the upper side wall of the air supply cylinder (27) 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). The lifting plate (29) and the air supply cylinder (27) are connected to each other. A same telescopic airbag (30) is fixedly connected between the two storage boxes (221). The lower end of the telescopic airbag (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 transmission 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 welds of new energy vehicles according to claim 3, characterized in that: The positioning assembly (37) includes 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 connected to positioning blocks (38) through springs, the left and right sides of the positioning block (38) are 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 the PLC controller (3), the lower side wall of the positioning block (38) is fixedly connected to a fixed plate (41), the positioning 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). The inner wall of the telescopic cylinder (42) is fixedly connected to an insert ring (43), and 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 magnet plate (46). The same spring is fixedly connected between the permanent magnet plate (46) and the insert plate (45). 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 welds of new energy vehicles according to claim 4, characterized in that: The upper side wall of the mounting seat (5) is fixedly connected to a display tube (48), and the display tube (48) and the support tube (33) are fixedly connected to a same gas supply pipe (49), a first electromagnetic one-way valve (50) is provided in the gas supply pipe (49), and a second electromagnetic one-way valve (56) is provided in the pressurizing tube (34). The inner wall of the display tube (48) is fixedly connected to a retaining ring (51), a piston plate (52) is placed on the upper side wall of the retaining ring (51), and 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 welds 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 welds 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).

Images