A device for testing the strength of connection points of automotive body structural components

Abstract

This invention belongs to the field of vehicle body connection testing technology, and specifically relates to a strength testing device for connection points of automotive body structural components. The device includes a housing containing a battery assembly and a control board. A gripping rod is installed at one end of the housing, and a support base is fixedly installed at the end of the gripping rod away from the housing. It also includes two side plates, each located on the side of the support base away from the housing. A connecting groove is formed in the side wall of the housing, and a magnetic moving assembly is installed inside the connecting groove to drive the two side plates to move. This invention quickly determines the strength of a weld point by detecting its resistance, and can adapt to weld point testing at bending and deformation locations on the vehicle body, thus improving the efficiency of vehicle body weld point testing. It also reduces the impact of oil stains, scale, etc., on the accuracy of weld point strength testing.

Description

Technical Field

[0001] This invention belongs to the field of vehicle body connection testing technology, and in particular relates to a device for testing the strength of connection points of automotive body structural components. Background Technology

[0002] Vehicle driving safety is highly dependent on the stability of the vehicle body structure, and the quality of the body connection points, especially the welds, is crucial. Insufficient weld strength can easily lead to loosening of the connection, structural deformation, or even breakage of critical parts when the vehicle is in motion, due to vibration, bumps, and complex stress. In order to ensure that the strength of the body connection points meets the requirements, it is necessary to conduct strength testing on the connection points.

[0003] Currently, ultrasonic testing has become a common method for testing weld strength due to its advantages of speed and non-destructive testing. The testing can be completed by attaching a special probe to the weld. For example, the portable ultrasonic testing device for automotive welds disclosed in patent publication number CN117907441A provides convenience for the testing work. However, in practical applications, the vehicle body structure is complex and has many curved parts. Welds are also distributed throughout the vehicle body. In addition, the heat and pressure during the welding process can cause the welds to deform to varying degrees. These factors interfere with the propagation of ultrasonic waves and signal reception, seriously affecting the testing accuracy and resulting in poor final performance. Summary of the Invention

[0004] The purpose of this invention is to address the above-mentioned problems by providing a device for testing the strength of connection points of automotive body structural components.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a strength testing device for connection points of automotive body structural components, comprising a housing, wherein a battery assembly and a control board are disposed inside the housing, a gripping rod is installed at one end of the housing, and a support base is fixedly installed at the end of the gripping rod away from the housing, and further comprising:

[0006] Both side plates are located on the side of the support base away from the box body. The side wall of the box body is provided with a connecting groove, and a magnetic moving component is provided inside the connecting groove. The magnetic moving component is used to drive the two side plates to move.

[0007] Two insulating blocks are disposed between two side plates, and both side plates are fixedly connected to the end of the insulating base on the same side. The side walls of the two insulating blocks and the side plates on the same side are provided with mounting grooves. An elastic conductive membrane is disposed inside the two mounting grooves. A connecting component is disposed inside the mounting grooves. The connecting component is used to fix the elastic conductive membrane and cooperate with the elastic conductive membrane to seal the groove opening of the mounting groove on the same side.

[0008] A gas generation unit is disposed inside the two side plates and is used to deliver airflow into the two mounting slots;

[0009] The cleaning unit, installed on the side wall of one of the side panels, is used to clean the weld points on the vehicle body.

[0010] Preferably, the magnetic moving assembly includes a non-magnetic rod fixedly installed inside the connecting groove. Both side plates are slidably connected to the rod wall of the non-magnetic rod. Support springs are fixedly provided between the side wall of the opposite side of the two side plates and the groove wall of the connecting groove. Two electromagnetic rings are sleeved on the rod wall of the non-magnetic rod, and both electromagnetic rings are fixedly inserted into the side wall of the same side plate. The two electromagnetic rings are electrically connected to the control board.

[0011] Preferably, both of the connecting components include a conductive ring fixedly installed inside the mounting groove. The groove opening is threaded with an insulating sleeve. The end of the insulating sleeve presses the outer edge of the elastic conductive film against the side wall of the conductive ring. The elastic conductive film is electrically connected to the control board through the conductive ring.

[0012] Preferably, the gas generating unit includes gas chambers formed inside two side plates. A piston is slidably connected inside each of the two gas chambers. A T-shaped sliding rod is fixedly connected to the side wall of each piston on the opposite side, and the two T-shaped sliding rods are slidably connected to the cavity wall of the same side gas chamber. The ends of the two T-shaped sliding rods abut against each other. A return spring is fixedly provided between the side wall of each piston on the opposite side and the same side gas chamber. Each of the two gas chambers has an air inlet and an air outlet. A one-way valve is installed inside each of the two air inlets and two air outlets. Both air outlets communicate with the interior of the same side mounting groove. Each of the two mounting grooves has a pressure hole in its wall, and a pressure valve is installed inside each of the two pressure holes.

[0013] Preferably, the cleaning unit includes a mounting cover fixedly installed on the side wall of one of the side plates, a drive motor fixedly installed inside the mounting cover, a mounting block provided on the outside of the mounting cover, and the output end of the drive motor driving the mounting block to rotate. A removable polishing cotton is installed on the side wall of the mounting block away from the mounting cover, and the drive motor is electrically connected to the control board.

[0014] Preferably, an air outlet pipe is fixedly inserted into the upper cavity wall of each of the two air chambers, and a normally closed solenoid valve is installed inside each of the two air outlet pipes. The two air outlet pipes are fixedly connected to a connecting hose. A normally open solenoid valve is installed inside each of the two air outlet holes. A protrusion is provided on the side of the mounting cover near the support base, and the protrusion is fixedly connected to the side wall of the side plate on the same side. The protrusion has an air jet hole that communicates with the air outlet hole on the same side, and a diversion solenoid valve is installed inside the air jet hole. The two normally closed solenoid valves, the two normally open solenoid valves, and the diversion solenoid valve are all electrically connected to the control board.

[0015] Preferably, one of the air outlets has a cooling groove in its wall, and a semiconductor cooler is disposed inside the cooling groove. The semiconductor cooler is fixedly inserted into the wall of the air outlet on the same side. The cold end of the semiconductor cooler is disposed inside the cooling groove, and the hot end of the semiconductor cooler is disposed outside the air outlet. The semiconductor cooler is electrically connected to the control board.

[0016] Preferably, an installation sleeve is fixedly installed on the side wall of one of the side plates, and a limit plate is slidably connected inside the installation sleeve. A limit bolt is slidably inserted into the side wall of the limit plate. Two sets of round holes matching the limit bolts are opened on the side wall of the installation sleeve. A limit nut is threadedly connected to the rod wall of the limit bolt. A slotting blade is fixedly installed on the side wall of the limit plate away from the side plate.

[0017] Compared with existing technologies, the advantages of a strength testing device for automotive body structural component connection points are:

[0018] 1. Through the cooperation of the set box, battery assembly, grip rod, support base, side plate, connecting groove, magnetic moving assembly, insulating block, mounting groove, elastic conductive film, connecting assembly and gas generation unit, the flexible elastic conductive film can fully contact the welding point of the vehicle body, and the strength of the welding point can be quickly judged by detecting the resistance of the welding point. It is suitable for welding point detection at the bending and deformation positions of the vehicle body, which helps to improve the efficiency of vehicle body welding point detection.

[0019] 2. The cleaning unit can remove impurities such as oil and oxide scale that may exist on the surface of the solder joint before testing, thereby avoiding these impurities from affecting the accuracy of the solder joint strength test.

[0020] 3. Through the coordinated operation of the air outlet pipe, normally closed solenoid valve, connecting hose, normally open solenoid valve, bump, air jet hole, and diversion solenoid valve, the airflow generated by the air generation unit can be used to quickly blow away the polished solder joints to remove the waste and impurities left during polishing, thereby improving the cleaning effect. In addition, with the addition of a cooling tank and semiconductor cooler, the solder joints can be cooled down before inspection, keeping them within a stable temperature range, which helps to improve the accuracy of solder joint inspection. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of a strength testing device for connection points of automotive body structural components provided by the present invention;

[0022] Figure 2 This is a top view schematic diagram of a strength testing device for connection points of automotive body structural components provided by the present invention;

[0023] Figure 3This is a schematic diagram of the internal structure of the housing of a strength testing device for connection points of automotive body structural components provided by the present invention;

[0024] Figure 4 This is a schematic diagram of the connection structure between the support base and the two side plates of a strength testing device for connection points of automotive body structural components provided by the present invention.

[0025] Figure 5 This is a schematic diagram of the internal structure of two insulating blocks in a strength testing device for connection points of automotive body structural components provided by the present invention.

[0026] Figure 6 This invention provides a strength testing device for connection points of automotive body structural components. Figure 4 Enlarged view of the structure of section A;

[0027] Figure 7 This is a schematic diagram of the connection structure of two air outlet pipes of a strength testing device for connection points of automotive body structural components provided by the present invention.

[0028] Figure 8 This is a schematic diagram of the internal structure of the mounting sleeve of the vehicle body structural component connection point strength testing device provided by the present invention.

[0029] In the diagram: 1. Box body; 2. Battery assembly; 3. Control board; 4. Grip rod; 5. Support base; 6. Side plate; 7. Connecting slot; 8. Magnetic moving assembly; 81. Non-magnetic rod; 82. Support spring; 83. Electromagnetic ring; 9. Insulating block; 10. Mounting slot; 11. Elastic conductive film; 12. Connecting assembly; 121. Conductive ring; 122. Insulating sleeve; 13. Gas generation unit; 131. Gas chamber; 132. Piston; 133. T-shaped slide rod; 134. Return spring; 135. Air inlet; 136. Air outlet; 13 7 One-way valve, 138 Air pressure port, 139 Air pressure valve, 14 Cleaning unit, 141 Mounting cover, 142 Drive motor, 143 Mounting block, 144 Polishing cotton, 15 Air outlet pipe, 16 Normally closed solenoid valve, 17 Connecting hose, 18 Normally open solenoid valve, 19 Protrusion, 20 Jet port, 21 Diverter solenoid valve, 22 Refrigeration tank, 23 Semiconductor cooler, 24 Mounting sleeve, 25 Limiting plate, 26 Limiting bolt, 27 Round hole, 28 Limiting nut, 29 Insert blade. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0031] like Figures 1-8As shown, a strength testing device for connection points of automotive body structural components includes a housing 1, inside which a battery assembly 2 and a control board 3 are disposed. A gripping rod 4 is installed at one end of the housing 1, and a support base 5 is fixedly installed at the end of the gripping rod 4 away from the housing 1. The device also includes two side plates 6, both of which are disposed on the side of the support base 5 away from the housing 1. A connecting groove 7 is formed in the side wall of the housing 1, and a magnetic moving assembly 8 is disposed inside the connecting groove 7. The magnetic moving assembly 8 is used to drive the two side plates 6 to move. The magnetic moving assembly 8 includes a non-magnetic rod 81 fixedly installed inside the connecting groove 7. Both side plates 6 are slidably connected to the rod wall of the non-magnetic rod 81. A support spring 82 is fixedly disposed between the side wall of the opposite side of the two side plates 6 and the groove wall of the connecting groove 7. Two electromagnetic rings 83 are sleeved on the rod wall of the non-magnetic rod 81, and both electromagnetic rings 83 are fixedly inserted into the side wall of the side plate 6 on the same side. The two electromagnetic rings 83 are electrically connected to the control board 3.

[0032] Two insulating blocks 9 are disposed between two side plates 6, and both side plates 6 are fixedly connected to the ends of the insulating bases on the same side. The side walls of the two insulating blocks 9 and the side plates 6 on the same side are provided with mounting grooves 10. An elastic conductive membrane 11 is disposed inside each of the two mounting grooves 10. A connecting component 12 is disposed inside the mounting groove 10. The connecting component 12 is used to fix the elastic conductive membrane 11 and cooperate with the elastic conductive membrane 11 to seal the groove opening of the mounting groove 10 on the same side. Both connecting components 12 include a conductive ring 121 fixedly installed inside the mounting groove 10. An insulating sleeve 122 is threadedly connected to the groove opening of the mounting groove 10. The end of the insulating sleeve 122 presses the outer edge of the elastic conductive membrane 11 against the side wall of the conductive ring 121. The elastic conductive membrane 11 is electrically connected to the control board 3 through the conductive ring 121. The elastic conductive membrane 11 has properties such as conductivity, elasticity and extensibility.

[0033] Gas generating unit 13 is disposed inside the two side plates 6 and is used to supply airflow into the two mounting slots 10. Gas generating unit 13 includes air chambers 131 formed inside the two side plates 6. Pistons 132 are slidably connected inside the two air chambers 131. T-shaped slide rods 133 are fixedly connected to the side walls of the two pistons 132 facing each other, and the two T-shaped slide rods 133 are slidably connected to the cavity walls of the air chambers 131 on the same side. The ends of the two T-shaped slide rods 133 abut against each other. Return springs 134 are fixedly provided between the side walls of the two pistons 132 on opposite sides and the air chambers 131 on the same side. Each wall is provided with an air inlet 135 and an air outlet 136. One-way valves 137 are installed inside the two air inlets 135 and the two air outlets 136. The two air outlets 136 are connected to the interior of the mounting groove 10 on the same side. Each wall of the mounting groove 10 is provided with a pressure hole 138, and a pressure valve 139 is installed inside the two pressure holes 138. When the air pressure in the mounting groove 10 is too high, the valve plate of the pressure valve 139 will be opened under the action of the air pressure, and the airflow will flow out through the pressure valve 139. Under the action of the two one-way valves 137, the outside air can only enter through the air inlet 135.

[0034] The cleaning unit 14 is installed on the side wall of one of the side plates 6 and is used to clean the weld points of the vehicle body. The cleaning unit 14 includes a mounting cover 141 fixedly installed on the side wall of one of the side plates 6. A drive motor 142 is fixedly installed inside the mounting cover 141. A mounting block 143 is provided on the outside of the mounting cover 141, and the output end of the drive motor 142 drives the mounting block 143 to rotate. A removable polishing cotton 144 is installed on the side wall of the mounting block 143 away from the mounting cover 141. The drive motor 142 is electrically connected to the control board 3.

[0035] Both air chambers 131 have air outlet pipes 15 fixedly inserted into their upper walls, and both air outlet pipes 15 have normally closed solenoid valves 16 installed inside. Both air outlet pipes 15 are connected to a connecting hose 17. Both air outlets 136 have normally open solenoid valves 18 installed inside. The mounting cover 141 has a protrusion 19 on the side near the support base 5, and the protrusion 19 is fixedly connected to the side wall of the side plate 6 on the same side. The protrusion 19 has a jet hole 20 that communicates with the air outlet 136 on the same side, and a diversion solenoid valve 21 is installed inside the jet hole 20. The two normally closed solenoid valves 16, the two normally open solenoid valves 18, and the diversion solenoid valve 21 are all electrically connected to the control board 3. The diversion solenoid valve 21 opens when energized and closes automatically when de-energized.

[0036] One of the vent holes 136 has a cooling groove 22 on its wall, and a semiconductor cooler 23 is installed inside the cooling groove 22. The semiconductor cooler 23 is fixedly inserted into the wall of the vent hole 136 on the same side. The cold end of the semiconductor cooler 23 is located inside the cooling groove 22, and the hot end of the semiconductor cooler 23 is located outside the vent hole 136. The semiconductor cooler 23 is electrically connected to the control board 3. When the semiconductor cooler 23 is powered on, its cold end can transfer heat to the hot end, thereby realizing the cooling work inside the cooling groove 22.

[0037] One of the side plates 6 has a mounting sleeve 24 fixedly installed on its side wall, and a limiting plate 25 is slidably connected inside the mounting sleeve 24. A limiting bolt 26 is slidably inserted into the side wall of the limiting plate 25. The side wall of the mounting sleeve 24 has two sets of round holes 27 that match the limiting bolt 26. A limiting nut 28 is threadedly connected to the rod wall of the limiting bolt 26. A slit blade 29 is fixedly installed on the side wall of the limiting plate 25 away from the side plate 6. When not in use, the slit blade 29 can be stored inside the mounting sleeve 24, which can improve portability and safety of use.

[0038] The operating principle of this invention is explained as follows: The inspector holds the gripping rod 4 and moves the entire device to the location of the weld point on the vehicle body to be inspected. Then, the polishing cotton 144 is aligned with one side of the weld point. Subsequently, the polishing button is pressed (the button is located on the end face of the support base 5 near the gripping rod 4 for easy pressing). The control board 3 then starts the drive motor 142, which drives the mounting block 143 to rotate the polishing cotton 144, thereby polishing the weld point. Under the polishing action of the polishing cotton 144, any oxide scale, oil stains, etc. that may exist on the surface of the weld point are removed. After removing the pressure and pressing for a certain period of time (this time is determined by the inspector, and polishing of the weld joint is generally completed in about 10 seconds), the inspector presses the blow button. At this time, the inspector aligns the protrusion 19 with the weld joint. After the blow button is pressed, the control board 3 controls the two electromagnetic rings 83 to work at a frequency of energizing for 2 seconds and de-energizing for 2 seconds. At the same time, the control board 3 controls the two normally open solenoid valves 18, the two normally closed solenoid valves 16, and the diversion solenoid valve 21 to be energized and opened. When the two electromagnetic rings 83 are energized, the two electromagnetic rings 83 generate a magnetic attraction force that attracts each other. Under the action of the air jet, the two side plates 6 move towards each other, and the two T-shaped slide bars 133 press against each other. Therefore, the two pistons 132 will be displaced relative to the side plates 6 on the same side and compress the return spring 134 on the same side. At this time, the pistons 132 will squeeze the space inside the air chamber 131 on the same side. Since the air inlet 135 and the air outlet 136 are both equipped with one-way valves 137, the air inside the two air chambers 131 can only be discharged through the air outlet 136 connected to the jet hole 20. Finally, the airflow will be ejected through the jet hole 20. Under the action of the ejected airflow, the waste and other impurities remaining during polishing can be removed. When the electromagnetic ring 83 is de-energized, the two side plates 6 move back to their original positions under the action of the return spring 134 and the support spring 82. At this time, external air is replenished into the air chamber 131 through the air inlet 135. Then the electromagnetic ring 83 works again, and the air jet 20 sprays out air again. Through the intermittent air jet, impurities that may exist at the solder joint can be cleaned. After spraying for a period of time (the spraying time is controlled by the tester, generally around 5 seconds), the tester releases the spray button and then repeats the above steps on the other side of the solder joint until the polishing and cleaning work on both sides of the solder joint is completed.

[0039] Subsequently, the two side plates 6 are moved to both sides of the welding point on the vehicle body, so that the welding point is between the two insulating blocks 9. Then, the detection button is pressed. At this time, the control board 3 controls the two electromagnetic rings 83 to be continuously energized. The two electromagnetic rings 83 generate a magnetic attraction force that causes the two side plates 6 to move towards each other. At this time, since the normally closed solenoid valve 16 and the normally open solenoid valve 18 are not energized, the air inside the two air chambers 131 will enter the two mounting slots 10 through the air outlet 136. The air pressure in the two mounting slots 10 will then increase, causing the two elastic conductive films 11 to bulge outward. Due to the elastic extensibility of the elastic conductive films 11, the bulging elastic conductive films 11 will make full contact with the side wall of the welding point. After the electromagnetic rings 83 are energized for 2 seconds, the control board 3 will connect the connection circuit between the two conductive rings 121 and the measuring circuit, that is, the current flows through the measuring circuit. The positive terminal of the circuit flows out, passes through the conductive ring 121 on one side, flows through the solder joint, and returns to the measuring circuit from the conductive ring 121 on the other side. Under constant voltage, current is inversely proportional to resistance. If the solder joint has defects such as internal holes, cracks, or insufficient melting, resulting in increased resistance, the current will decrease accordingly. If the solder joint is over-welded and the molten part of the solder joint is too thin, the resistance at the solder joint may be too small, and the current will increase accordingly. The measuring circuit of the control board 3 can determine the melting state of the solder joint by measuring the intensity of the current flowing through it. When the current intensity detected by the measuring circuit of the control board 3 is not within the threshold range (this threshold is preset based on factors such as the body material, the size of the solder joint, and the set detection current intensity), it indicates that the solder joint may have defects that affect the strength. At this time, the control board 3 will remind the inspection personnel through its own voice module.

[0040] If the control board 3 does not issue a voice prompt, the inspector can proceed to the next weld inspection. If the control board 3 issues a voice prompt, the inspector can remove the limit nut 28 and pull out the limit bolt 26. Then, the insert blade 29 is moved out of the mounting sleeve 24, and the limit plate 25 is fixed to the end of the mounting sleeve 24 away from the side plate 6 through the limit bolt 26, the limit nut 28, and the round hole 27. The inspector then aligns the insert blade 29 with the gap at the weld base material and activates the insert button. At this time, the control board 3 will control the electromagnetic ring 83 on the same side as the mounting sleeve 24 to be normally energized, and supply power to the electromagnetic ring 83 on the other side through a reverse circuit. At this time, the two electromagnetic rings 83 generate a repulsive magnetic force. Therefore, under the action of the repulsive magnetic force between the two electromagnetic rings 83, the two side plates 6 are subjected to forces in opposite directions. At the same time, the inspector applies a pushing force to the side plate 6 on the same side as the mounting sleeve 24. Under the action of the pushing force, the insert blade 29 moves into the gap of the base material. The magnetic repulsive force can assist the inspector in pushing the insert blade 29 into the gap. After the insert blade 29 is inserted into the gap, the inspector controls the insert blade 29 to swing relative to the gap, so that a prying force can be applied to the gap at the weld point to check whether the weld point separates under the action of the prying force, so as to quickly check whether the strength of the weld point meets the requirements.

[0041] The polishing and airflow cleaning of the solder joints can be determined by the inspector based on the surface condition of the solder joints. For example, if the surface of the solder joints is smooth and free of impurities such as oil or oxide scale, polishing and airflow cleaning can be omitted, and the solder joints can be inspected directly. Secondly, when the control board 3 starts the airflow cleaning process, it will also simultaneously start the semiconductor cooler 23. The semiconductor cooler 23 can transfer the heat inside the cooling tank 22 from the cold end to the hot end, thereby cooling the air inside the cooling tank 22 (the temperature is generally below 8°C). When the airflow flows through the cooling tank 22, the temperature of the airflow will decrease. When the cooled airflow is sprayed out through the nozzle, it can cool the solder joints, thereby keeping the solder joints at a uniform low temperature before inspection to improve the accuracy of solder joint inspection.

[0042] 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 within the protection scope of the present invention.

Claims

1. A strength testing device for connection points of automotive body structural components, comprising a housing (1), wherein a battery assembly (2) and a control board (3) are disposed inside the housing (1), a gripping rod (4) is installed at one end of the housing (1), and a support base (5) is fixedly installed at the end of the gripping rod (4) away from the housing (1), characterized in that, Also includes: Two side plates (6) are both located on the side of the support base (5) away from the box body (1). The side wall of the box body (1) is provided with a connecting groove (7), and a magnetic moving component (8) is provided inside the connecting groove (7). The magnetic moving component (8) is used to drive the two side plates (6) to move. Two insulating blocks (9) are set between two side plates (6), and both side plates (6) are fixedly connected to the end of the insulating seat on the same side. The side walls of the two insulating blocks (9) and the side plates (6) on the same side are provided with mounting grooves (10). An elastic conductive film (11) is provided inside the two mounting grooves (10). A connecting component (12) is provided inside the mounting groove (10). The connecting component (12) is used to fix the elastic conductive film (11) and cooperate with the elastic conductive film (11) to seal the groove opening of the mounting groove (10) on the same side. Gas generation unit (13) is disposed inside the two side plates (6) for supplying airflow into the two mounting slots (10); A cleaning unit (14) is installed on the side wall of one of the side panels (6) for cleaning the weld points on the vehicle body.

2. The device for testing the strength of connection points of automotive body structural components according to claim 1, characterized in that, The magnetic moving assembly (8) includes a non-magnetic rod (81) fixedly installed inside the connecting groove (7). Both side plates (6) are slidably connected to the rod wall of the non-magnetic rod (81). Support springs (82) are fixedly provided between the side wall of the opposite side of the two side plates (6) and the groove wall of the connecting groove (7). Two electromagnetic rings (83) are sleeved on the rod wall of the non-magnetic rod (81), and the two electromagnetic rings (83) are fixedly inserted into the side wall of the same side plate (6). The two electromagnetic rings (83) are electrically connected to the control board (3).

3. The device for testing the strength of connection points of automotive body structural components according to claim 1, characterized in that, Both of the connection components (12) include a conductive ring (121) fixedly installed inside the mounting groove (10). The groove opening of the mounting groove (10) is threaded with an insulating sleeve (122). The end of the insulating sleeve (122) presses the outer edge of the elastic conductive film (11) against the side wall of the conductive ring (121). The elastic conductive film (11) is electrically connected to the control board (3) through the conductive ring (121).

4. The device for testing the strength of connection points of automotive body structural components according to claim 1, characterized in that, The gas-generating unit (13) includes gas chambers (131) formed inside two side plates (6). Pistons (132) are slidably connected inside each of the two gas chambers (131). T-shaped slide rods (133) are fixedly connected to the sidewalls of the two pistons (132) on opposite sides, and both T-shaped slide rods (133) are slidably connected to the cavity walls of the gas chambers (131) on the same side. The ends of the two T-shaped slide rods (133) abut against each other. The sidewalls of the two pistons (132) on opposite sides are connected to the gas chambers (131) on the same side. Each is fixedly equipped with a return spring (134). The walls of the two air chambers (131) are provided with an air inlet (135) and an air outlet (136). The interiors of the two air inlets (135) and the two air outlets (136) are equipped with a one-way valve (137). The two air outlets (136) are connected to the interior of the mounting groove (10) on the same side. The walls of the two mounting grooves (10) are provided with air pressure holes (138), and the interiors of the two air pressure holes (138) are equipped with air pressure valves (139).

5. The device for testing the strength of connection points of automotive body structural components according to claim 4, characterized in that, The cleaning unit (14) includes a mounting cover (141) fixedly installed on the side wall of one of the side plates (6). A drive motor (142) is fixedly installed inside the mounting cover (141). A mounting block (143) is provided on the outside of the mounting cover (141). The output end of the drive motor (142) drives the mounting block (143) to rotate. A removable polishing cotton (144) is installed on the side wall of the mounting block (143) away from the mounting cover (141). The drive motor (142) is electrically connected to the control board (3).

6. The device for testing the strength of connection points of automotive body structural components according to claim 5, characterized in that, The upper walls of the two air chambers (131) are fixedly connected with air outlet pipes (15), and the interior of the two air outlet pipes (15) is equipped with normally closed solenoid valves (16). The two air outlet pipes (15) are connected together by a connecting hose (17). The interior of the two air outlets (136) is equipped with normally open solenoid valves (18). The mounting cover (141) is provided with a protrusion (19) on the side near the support base (5), and the protrusion (19) is fixedly connected to the side wall of the side plate (6) on the same side. The protrusion (19) is provided with a jet hole (20) that is connected to the air outlet (136) on the same side, and a diversion solenoid valve (21) is installed inside the jet hole (20). The two normally closed solenoid valves (16), the two normally open solenoid valves (18) and the diversion solenoid valve (21) are all electrically connected to the control board (3).

7. The device for testing the strength of connection points of automotive body structural components according to claim 4, characterized in that, One of the air outlets (136) has a cooling groove (22) on its wall, and a semiconductor cooler (23) is provided inside the cooling groove (22). The semiconductor cooler (23) is fixedly inserted into the wall of the air outlet (136) on the same side. The cold end of the semiconductor cooler (23) is located inside the cooling groove (22), and the hot end of the semiconductor cooler (23) is located outside the air outlet (136). The semiconductor cooler (23) is electrically connected to the control board (3).

8. The device for testing the strength of connection points of automotive body structural components according to claim 1, characterized in that, An installation sleeve (24) is fixedly installed on the side wall of one of the side plates (6), and a limit plate (25) is slidably connected inside the installation sleeve (24). A limit bolt (26) is slidably inserted into the side wall of the limit plate (25). Two sets of round holes (27) matching the limit bolt (26) are opened on the side wall of the installation sleeve (24). A limit nut (28) is threadedly connected to the rod wall of the limit bolt (26). A slotting blade (29) is fixedly installed on the side wall of the limit plate (25) away from the side plate (6).

Images