An equipment for detecting the quality of glue application on the body-in-white of automobiles

Abstract

The present invention belongs to the technical field of glue application dimension detection, and particularly relates to a glue application quality detection device for automobile body in white, which includes a robotic arm and a mounting bracket installed at the movable end of the robotic arm. It further includes: a sealing cover, which is detachably installed at the end of the mounting bracket away from the robotic arm. A control main board is installed on the side wall of the sealing cover. The sealing cover is equipped with a starting component, and the starting component is electrically connected to the control main board. The present invention can expose in advance the positions with poor dimensions caused by bubbles, voids, etc. in the glue application, so as to ensure that the actual dimensions of the glue application can be detected, reduce the possibility of missing defect positions, and can reduce the influence of dust and impurities attached to the glue application surface on the accuracy of glue application dimension detection. Moreover, when the number of glue application defects is large and the defect degree is relatively serious, it can timely remind the personnel. At the same time, it can detect glue leakage points and improve the comprehensiveness of glue application detection.

Description

Technical Field

[0001] The present invention belongs to the technical field of glue application size detection, and in particular relates to a device for detecting the quality of glue application on automobile body-in-white. Background Art

[0002] The strength and sealing performance of the automobile body-in-white are crucial for the overall performance and safety of the vehicle. After welding, there are gaps in the body, and glue application can fill and reinforce them to prevent corrosion and water leakage. However, the quality of glue application is easily affected by various factors, such as the amount of glue and the coating uniformity. Once the quality of glue application is poor, it may cause serious problems such as a decrease in the strength of the body, water leakage, and rust. Therefore, it is extremely necessary to detect the quality of glue application on the automobile body-in-white.

[0003] At present, after the glue is applied to the automobile body-in-white, methods such as light detection are usually used to assist in the detection of the applied glue. For example, a new type of white body glue application detection device disclosed in the patent publication number CN206291862U, and there are also structures such as laser thickness measurement probes installed on the automatic robotic arm to check one by one whether the glue application size meets the usage requirements along the glue application path;

[0004] However, when applying glue to the automobile body-in-white, air may be mixed into the glue, resulting in the generation of bubbles and voids inside the applied glue. Since the bubbles are hidden inside the glue and there is no obvious abnormality on the surface of the applied glue, it is difficult to directly judge whether the glue application size meets the standard. When using laser thickness measurement detection, the laser reflects off the surface of the glue and cannot detect the internal bubble condition. The glue containing bubbles only seems to meet the requirements in terms of surface size (affecting the accuracy of judging the glue application size), but in fact, the internal bubbles and voids greatly reduce its strength. During the subsequent use of the automobile, due to the fact that the strength of the glue cannot meet the actual working conditions, the corresponding glue application position is extremely prone to leakage faults under the influence of long-term stress, vibration, and environmental factors, which has an adverse impact on the overall performance of the automobile and even endangers driving safety in severe cases. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems and provide a device for detecting the quality of glue application on automobile body-in-white.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions: A device for detecting the quality of glue application on automobile body-in-white, including a robotic arm and a mounting bracket installed at the movable end of the robotic arm, and further including:

[0007] A sealing cover detachably installed at the end of the mounting bracket away from the robotic arm, a control main board is installed on the side wall of the sealing cover, the sealing cover is provided with a starting component, and the starting component is electrically connected to the control main board;

[0008] A movable block is arranged inside the sealing cover, and a laser thickness measuring probe is installed on the end surface of the movable block, and the detection end of the laser thickness measuring probe is arranged inside the movable block. The sealing cover is installed with a driving mechanism, and the driving mechanism drives the movable block to move horizontally and vertically;

[0009] A conical gas nozzle is arranged on one side of the laser thickness measuring probe and fixedly plugged with the end surface of the movable block. The sealing cover is equipped with a gas supply mechanism, and the gas outlet end of the gas supply mechanism is connected with the conical gas nozzle;

[0010] A leakage detection unit is installed on the side wall of the sealing cover, and the leakage detection unit is connected to the interior of the sealing cover;

[0011] The defect locating mechanism is installed on the outer side of the sealing cover, and the control main board controls the operation of the defect locating mechanism according to the electrical signal output by the laser thickness measuring probe.

[0012] Preferably, the starting assembly includes a frame-type sealing gasket fixedly mounted on one end of the sealing cover away from the robotic arm, an installation groove is provided on the inner side of the frame-type sealing gasket, and a pressure switch is provided on the inner side of the installation groove. The pressure switch is mounted on the end of the sealing cover, and the pressure switch is electrically connected to the control main board.

[0013] Preferably, the driving mechanism includes a strip plate arranged inside the sealing cover, a strip hole is opened on the end face of the strip plate, and the movable block is slidably arranged on the inner side of the strip hole, a first screw driving assembly is installed inside the strip hole, and the first screw driving assembly is transmission connected to the movable block, the first screw driving assembly drives the movable block to move horizontally in the strip hole, the sealing cover is installed with a second screw driving assembly, and the second screw driving assembly is transmission connected to the strip plate, the second screw driving assembly drives the strip plate to move horizontally in the sealing cover, and the first screw driving assembly and the second screw driving assembly are both electrically connected to the control main board.

[0014] Preferably, the air supply mechanism includes an installation cavity opened on the upper side of the interior of the sealing cover, and an air pump is fixedly installed inside the installation cavity, the air outlet end of the air pump is fixedly connected to an air supply pipe, and the air outlet end of the air supply pipe is connected to a connecting hose, the connecting hose is connected to a conical gas nozzle, the air pump is electrically connected to the control main board, the side wall of the sealing cover is opened, and a normally open solenoid valve electrically connected to the control main board is installed inside the exhaust hole.

[0015] Preferably, the leak detection unit includes two barrels fixedly installed on the outer side wall of the sealing cover. A pressure measuring hole and a comparison hole are formed in the side wall of the sealing cover, and both the pressure measuring hole and the comparison hole are communicated with the inside of the barrel on the same side. A normally closed solenoid valve is installed inside the comparison hole. Elastic telescopic components are installed in both the pressure measuring hole and the comparison hole and the barrel on the same side. The movable ends of the two elastic telescopic components are both installed with insulating blocks, and both insulating blocks are slidably connected to the side wall of the barrel on the same side. Conductive blocks are installed at the opposite ends of the two insulating blocks, and the opposite ends of the two conductive blocks are in sliding contact. The two conductive blocks are electrically connected to the control main board. An electromagnetic control valve is installed inside the air delivery pipe, and both the electromagnetic control valve and the normally closed solenoid valve are electrically connected to the control main board.

[0016] Preferably, the defect positioning mechanism includes a mounting cover sleeved outside the control main board, and the mounting cover is fixed on the outer side wall of the sealing cover. A fixing frame is fixedly installed inside the mounting cover, and a plurality of lamp beads are fixedly installed on the side wall of the fixing frame. A plurality of through holes are formed in the side wall of the mounting cover, and the light emitting ends of the lamp beads all extend to the inner sides of the corresponding through holes. The control main board controls the operation of each lamp bead according to the electrical signal output by the laser thickness measuring probe. An early warning component is installed inside the mounting cover.

[0017] Preferably, both of the elastic telescopic components include sliding blocks slidably arranged inside the barrels, and the insulating blocks are fixedly connected to the sliding blocks. Springs are fixedly arranged between the sliding blocks and the barrels. One end of the sliding block away from the spring is fixedly connected with a connecting rod. Pistons are slidably connected inside both the pressure measuring hole and the comparison hole, and the pistons are fixedly connected to the connecting rods.

[0018] Preferably, the early warning component includes an insulating groove plate fixedly installed on the inner wall of the mounting cover, and a photosensitive resistor strip is fixedly installed inside the insulating groove plate. An electromagnetic switch is fixedly installed on the inner wall of the mounting cover, and the electromagnetic switch is electrically connected to the photosensitive resistor strip through the control main board.

[0019] Compared with the existing technology, the advantages of a glue application quality detection device for an automobile body-in-white are as follows:

[0020] Through the mutual cooperation of the set robotic arm, mounting bracket, sealing cover, control main board, starting component, movable block, driving mechanism and laser thickness gauge probe, the automatic dimensional inspection work of the automotive body-in-white gluing can be carried out. And through the mutual cooperation of the set conical gas nozzle and gas supply mechanism, before laser thickness measurement, a high-pressure gas impact can be applied to the gluing position, so that possible air bubbles and voids in the glue can be deformed by depression in advance, so as to detect the actual size of the gluing, reduce the possibility of missing the defective position, and timely and effectively detect gluing defects such as air bubbles and voids, ensure that the gluing quality meets the use requirements. Secondly, possible dust particles and the like attached to the gluing surface can be removed in advance to avoid the influence of particles such as dust on the accuracy of laser thickness measurement.

[0021] Through the set leakage detection unit, after the laser thickness measurement is completed, the air source of the gas supply mechanism can be used to quickly detect the leak point of the gluing position, so as to improve the comprehensiveness of the gluing detection and further reduce the omission of poor-quality gluing positions.

[0022] Through the set defect positioning mechanism, based on the results detected by the laser thickness gauge probe, the position with dimensional defects in the gluing can be roughly calibrated, so as to facilitate the subsequent personnel to repair the gluing defect position. At the same time, with the set warning component, when the number of gluing defect points at a single gluing position is large and the defect severity is large, a warning message can be automatically sent out to remind the personnel to timely trace the reason for the poor gluing quality, so as to adjust the parameters of the subsequent gluing equipment work, etc., which is beneficial to improving the gluing quality of the subsequent gluing equipment. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of a device for detecting the gluing quality of an automotive body-in-white provided by the present invention;

[0024] Figure 2 is a schematic internal structure diagram of a sealing cover of a device for detecting the gluing quality of an automotive body-in-white provided by the present invention;

[0025] Figure 3 is a schematic top view structural diagram of a driving mechanism of a device for detecting the gluing quality of an automotive body-in-white provided by the present invention;

[0026] Figure 4 is a schematic structural diagram of a leakage detection unit of a device for detecting the gluing quality of an automotive body-in-white provided by the present invention;

[0027] Figure 5 is a schematic three-dimensional structural diagram of a barrel of a device for detecting the gluing quality of an automotive body-in-white provided by the present invention;

[0028] Figure 6It is a component of a glue application quality detection device for automotive white body provided by the present invention Figure 4 The enlarged structure diagram of part A in

[0029] Figure 7 It is the schematic structural diagram of a defect location mechanism of a glue application quality detection device for automotive white body provided by the present invention

[0030] Figure 8 It is a component of a glue application quality detection device for automotive white body provided by the present invention Figure 7 The enlarged structure diagram of part B in

[0031] In the figure: 1 robotic arm, 2 mounting bracket, 3 sealing cover, 4 control main board, 5 starting component, 51 frame-shaped sealing gasket, 52 mounting groove, 53 pressure switch, 6 movable block, 7 laser thickness measurement probe, 8 driving mechanism, 81 strip-shaped plate, 82 strip-shaped hole, 83 first screw driving component, 84 second screw driving component, 9 conical gas spray head, 10 air supply mechanism, 101 mounting cavity, 102 air pump, 103 air delivery pipe, 104 connecting hose, 105 exhaust hole, 106 normally open solenoid valve, 11 leakage detection unit, 111 barrel, 112 pressure measurement hole, 113 comparison hole, 114 normally closed solenoid valve, 115 insulating block, 116 conductive block, 117 electric control valve, 12 defect location mechanism, 121 mounting cover, 122 fixing bracket, 123 lamp bead, 124 through hole, 13 elastic telescopic component, 131 sliding block, 132 spring, 133 connecting rod, 134 piston, 14 warning component, 141 insulating groove board, 142 photosensitive resistor strip, 143 electromagnetic switch Detailed implementation manners

[0032] 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 of the embodiments

[0033] As Figures 1-8 shown, a glue application quality detection device for automotive white body includes a robotic arm 1 and a mounting bracket 2 installed at the movable end of the robotic arm 1, and further includes: a sealing cover 3, the sealing cover 3 is detachably installed at the end of the mounting bracket 2 away from the robotic arm 1, a control main board 4 is installed on the side wall of the sealing cover 3, a starting component 5 is installed on the sealing cover 3, and the starting component 5 is electrically connected to the control main board 4. The starting component 5 includes a frame-shaped sealing gasket 51 fixedly installed at one end of the sealing cover 3 away from the robotic arm 1. An installation groove 52 is opened inside the frame-shaped sealing gasket 51, and a pressure switch 53 is arranged inside the installation groove 52. The pressure switch 53 is installed at the end of the sealing cover 3, and the pressure switch 53 is electrically connected to the control main board 4. Among them, the robotic arm 1 can be installed on an electric guide rail, and the robotic arm 1 can move on the electric guide rail to increase the coverage of the glue application detection of the white body

[0034] The movable block 6 is arranged on the inner side of the sealing cover 3, and a laser thickness measuring probe 7 is installed on the end face of the movable block 6, and the detection end of the laser thickness measuring probe 7 is arranged on the inner side of the movable block 6. The sealing cover 3 is installed with a driving mechanism 8, and the driving mechanism 8 drives the movable block 6 to move horizontally and longitudinally. The driving mechanism 8 includes a strip plate 81 arranged inside the sealing cover 3, and a strip hole 82 is opened on the end face of the strip plate 81, and the movable block 6 is slidably arranged on the inner side of the strip hole 82, and a first screw driving assembly 83 is installed inside the strip hole 82, and the first screw driving assembly 83 is transmission-connected with the movable block 6, and the first screw driving assembly 83 drives the movable block 6 in The strip plate 81 is connected to the sealing cover 3 by a second screw drive assembly 84, and the second screw drive assembly 84 is connected to the strip plate 81 by transmission. The second screw drive assembly 84 drives the strip plate 81 to move horizontally in the sealing cover 3. The first screw drive assembly 83 and the second screw drive assembly 84 are both electrically connected to the control main board 4. The first screw drive assembly 83 and the second screw drive assembly 84 include two screws, bearings, motors, transmission belts, pulleys and other components. The motor drives the screw on the same side to rotate. Under the action of the transmission belt, the other screw rotates synchronously, thereby driving the movable block 6 and the strip plate 81 to move.

[0035] The conical gas nozzle 9 is arranged on one side of the laser thickness measuring probe 7 and fixedly plugged with the end face of the movable block 6. The sealing cover 3 is equipped with a gas supply mechanism 10, and the gas outlet end of the gas supply mechanism 10 is connected with the conical gas nozzle 9. The gas supply mechanism 10 includes a mounting cavity 101 opened on the upper side of the sealing cover 3, and an air pump 102 is fixedly installed inside the mounting cavity 101. The gas outlet end of the air pump 102 is fixedly connected with a gas delivery pipe 103, and the gas outlet end of the gas delivery pipe 103 is connected with a connecting hose 104. The connecting hose 104 is connected to the conical gas nozzle 9, the air pump 102 is electrically connected to the control main board 4, the side wall of the sealing cover 3 is provided with an exhaust hole 105, and the exhaust hole 105 is internally provided with a normally open solenoid valve 106 electrically connected to the control main board 4, the aperture of the air inlet end of the conical gas nozzle 9 is larger than the aperture of the air outlet end, ensuring that the flow rate of the gas ejected from the conical gas nozzle 9 is large enough, and an air filter is installed at the suction end of the air pump 102 to minimize the inhalation of dust and the like in the air.

[0036] The leak detection unit 11 is installed on the side wall of the sealing cover 3, and the leak detection unit 11 communicates with the inside of the sealing cover 3. The leak detection unit 11 includes two barrels 111 fixedly installed on the outer side wall of the sealing cover 3. A pressure measuring hole 112 and a comparison hole 113 are formed in the side wall of the sealing cover 3, and both the pressure measuring hole 112 and the comparison hole 113 communicate with the inside of the barrel 111 on the same side. A normally closed solenoid valve 114 is installed inside the comparison hole 113. Elastic telescopic components 13 are installed in both the pressure measuring hole 112 and the comparison hole 113 and the barrel 111 on the same side. The movable ends of the two elastic telescopic components 13 are both installed with insulating blocks 115, and both insulating blocks 115 are slidably connected to the side wall of the barrel 111 on the same side. Conductive blocks 116 are installed at the opposite ends of the two insulating blocks 115, and the opposite ends of the two conductive blocks 116 are in sliding contact. The two conductive blocks 116 are electrically connected to the control main board 4. An electric control valve 117 is installed inside the gas transmission pipe 103, and both the electric control valve 117 and the normally closed solenoid valve 114 are electrically connected to the control main board 4.

[0037] Both of the two elastic telescopic components 13 include sliding blocks 131 slidably arranged inside the barrel 111, and the insulating blocks 115 are fixedly connected to the sliding blocks 131. A spring 132 is fixedly arranged between the sliding block 131 and the barrel 111. One end of the sliding block 131 away from the spring 132 is fixedly connected with a connecting rod 133. Pistons 134 are slidably connected inside both the pressure measuring hole 112 and the comparison hole 113, and the pistons 134 are fixedly connected to the connecting rod 133.

[0038] The defect positioning mechanism 12 is installed outside the sealing cover 3. The control main board 4 controls the defect positioning mechanism 12 to work according to the electrical signal output by the laser thickness measuring probe 7. The defect positioning mechanism 12 includes an installation cover 121 sleeved outside the control main board 4, and the installation cover 121 is fixed on the outer side wall of the sealing cover 3. A fixing frame 122 is fixedly installed inside the installation cover 121, and a plurality of lamp beads 123 are fixedly installed on the side wall of the fixing frame 122. A plurality of through holes 124 are formed in the side wall of the installation cover 121, and the light emitting ends of the respective lamp beads 123 extend to the inner sides of the corresponding through holes 124. The control main board 4 controls the respective lamp beads 123 to work according to the electrical signal output by the laser thickness measuring probe 7. An early warning component 14 is installed inside the installation cover 121. When the current passing through the lamp beads 123 increases, the intensity of the light emitted by them increases synchronously. And when the control main board 4 controls the lamp beads 123 to work, the brightness of the light emitted by the lamp beads 123 is sufficient for personnel to distinguish whether the lamp beads 123 are lit.

[0039] The warning component 14 includes an insulating groove plate 141 fixedly installed on the inner wall of the installation cover 121. A photoresistor strip 142 is fixedly installed inside the insulating groove plate 141. An electromagnetic switch 143 is fixedly installed on the inner wall of the installation cover 121, and the electromagnetic switch 143 is electrically connected to the photoresistor strip 142 through the control main board 4. Within a certain light intensity range (this range varies depending on the selected photosensitive material), the resistance of the photoresistor strip 142 decreases synchronously with the increase in light intensity.

[0040] The operating principle of the present invention is described as follows: The controller on the robotic arm 1 controls the robotic arm 1 to work according to a preset program. The robotic arm 1 aligns the sealing cover 3 with the position on the white body that needs to be subjected to glue application detection through the mounting bracket 2 according to the preset program. Subsequently, the sealing cover 3 is controlled to press against the white body. At this time, the frame-shaped sealing gasket 51 will be subjected to a squeezing effect (after the frame-shaped sealing gasket 51 abuts against the white body, it can keep the space between the sealing cover 3 and the white body sealed. For some positions with excessive angles such as arcs and corners, the shapes of the end of the sealing cover 3 and the frame-shaped sealing gasket 51 can be designed for special positions so that after the sealing cover 3 presses against the white body, the frame-shaped sealing gasket 51 can maintain a tightly closed and fitting state), thereby causing the pressure switch 53 to close. After the control main board 4 receives the closing electrical signal of the pressure switch 53, the control main board 4 starts a glue application detection operation;

[0041] After the control main board 4 starts the glue coating detection work, the control main board 4 will control the first screw driving assembly 83 and the second screw driving assembly 84 to work, so that the movable block 6 moves along the glue coating path at this position (programmed according to the glue coating path at this position, so that the first screw driving assembly 83 and the second screw driving assembly 84 drive the movable block 6 to move along the glue coating path). At the same time, the control main board 4 will start the air pump 102 to work and control the electric control valve 117 inside the air delivery pipe 103 to open. At this time, the air pump 102 will inhale the external air (a filter is provided at the inhalation end of the air pump 102 to avoid inhaling dust in the air, etc.). Subsequently, the inhaled air is conveyed through the air delivery pipe 103 into the connecting hose 104 and ejected through the conical gas nozzle 9, so as to be able to convey high-pressure gas to the glue coating material. Under the action of the high-pressure gas, first, the dust particles and the like that may adhere to the surface of the glue coating material will be blown off and discharged through the exhaust hole 105. Secondly, when the conical gas nozzle 9 moves to the position where there are bubbles and air pockets inside the glue coating material, since there are bubbles and air pockets inside the glue coating material, the structural strength at this position is relatively low. At this time, under the action of the high-pressure gas, the glue at this position will deform towards the bubbles and air pockets, thus forming an indentation phenomenon, making the position where the glue coating size is unqualified exposed in advance. When the first screw driving assembly 83 and the second screw driving assembly 84 control the movable block 6 to complete a single movement along the glue coating path according to the preset program, the control main board 4 controls the air pump 102 to stop working (wherein, since the high-pressure gas moves along the path of the glue coating material, the glue coating material directly bears the pressure of the high-pressure gas. The pressure of the ejected high-pressure gas is set based on the material of the used glue coating material and the strength test after the glue coating material contains bubbles and air pockets, and will not damage the vehicle body structure, welds, etc.);

[0042] Subsequently, the control main board 4 controls the first screw driving assembly 83 and the second screw driving assembly 84 to drive the movable block 6 to slowly move back and reset in the opposite direction. When the movable block 6 moves back and resets, the control main board 4 controls the laser thickness measurement probe 7 to work (at this moving-back speed, the thickness measurement frequency of the laser thickness measurement probe 7 can meet the thickness measurement work for each point on the glue application path). The laser thickness measurement probe 7 emits laser light and calculates the time of receiving the reflected laser light, so as to judge the thickness of the glue at this position and transmit the thickness data to the control main board 4. The control main board 4 judges whether the thickness exceeds the threshold according to the preset program and algorithm. When the control main board 4 judges that the thickness exceeds the threshold (this threshold is set according to the requirement of the vehicle body for the glue application thickness), the control main board 4 controls the lamp bead 123 corresponding to the current position to work (this lamp bead 123 is controlled to work based on the time when the movable block 6 starts to move back. For example, within 3 seconds after the movable block 6 starts to move back, if the control main board 4 receives the electrical signal output by the laser thickness measurement probe 7, the control main board 4 controls the frontmost lamp bead 123 to work. When the movable block 6 moves back for 4 to 6 seconds, when the control main board 4 receives the electrical signal output by the laser thickness measurement probe 7, the control main board 4 controls the second lamp bead 123 to work. At the same time, after the control main board 4 controls the lamp bead 123 to work, the control main board 4 will control the working lamp bead 123 to keep working until the detection work ends), which is convenient for personnel to judge the defective points of the glue application according to the position of the lamp bead 123, so as to facilitate the subsequent repair work. Secondly, after the control main board 4 judges that the current thickness value exceeds or is lower than the threshold, it will control the current intensity input to the lamp bead 123 according to the difference between the current thickness value and the threshold, and the larger the difference, the larger the current intensity input to the lamp bead 123, so that the light intensity emitted by the lamp bead 123 is greater. After the movable block 6 moves back and resets, the control main board 4 controls the connection circuit of the photosensitive resistor strip 142 and the electromagnetic switch 143 to be connected. When there are more defective points at this glue application position, the number of lit lamp beads 123 is more, and when the deviation difference between the thickness at the glue application position and the set threshold is larger, the light intensity emitted by the lamp bead 123 is greater. At this time, the photosensitive resistor strip 142 is subjected to greater light intensity, so the resistance of the photosensitive resistor strip 142 itself drops more. At this time, the current intensity input to the electromagnetic switch 143 is larger, so the moving contact of the electromagnetic switch 143 will be magnetically attracted and closed. After the control main board 4 receives the closing electrical signal of the electromagnetic switch 143, the control main board 4 will remind the personnel through its own voice module that the number of defective points at this glue application position is more and the degree of defect is relatively serious, and the relevant personnel should promptly trace the cause of this phenomenon, so as to adjust the equipment working parameters in time (such as optimizing the glue application speed, glue application output, etc.) when performing the glue application work at the same position later, to ensure the glue application quality at the same position of other white bodies. (Among them, since the lamp bead 123 switches to the next lamp bead 123 every 3 seconds when the movable block 6 moves,Therefore, the lamp bead 123 can relatively accurately indicate the defective points);

[0043] The control main board 4 controls the first screw drive assembly 83 and the second screw drive assembly 84 to stop working. Subsequently, the control main board 4 controls the air pump 102 to work again, and at the same time controls the normally open solenoid valve 106 in the exhaust hole 105 to be energized and closed, and controls the normally closed solenoid valve 114 in the comparison hole 113 to be energized and opened. At this time, the air transported by the air pump 102 into the inside of the sealing cover 3 cannot be discharged, so that the air pressures inside the sealing cover 3, inside the comparison hole 113 and inside the pressure measuring hole 112 increase synchronously. Under the action of the increased air pressure, the two pistons 134 will be pushed outward, so that the two insulating blocks 115 will move synchronously through the connecting rod 133 and the sliding block 131. At this time, the two conductive blocks 116 remain in contact. After the air pump 102 works again for 15 seconds, the control main board 4 controls the air pump 102 to stop working, controls the electric control valve 117 to close, and controls the normally closed solenoid valve 114 to be de-energized and closed. If there is a leak in the applied glue material, then the high-pressure air flow inside the sealing cover 3 will seep out through this leak at this time, so that the air pressures inside the sealing cover 3 and inside the pressure measuring hole 112 decrease. Since the normally closed solenoid valve 114 remains closed, the air pressure in the comparison hole 113 will not decrease. At this time, under the action of the spring 132, the piston 134 in the pressure measuring hole 112 will move back, driving the insulating block 115 on the same side to move back, so that the two conductive blocks 116 are separated. After the control main board 4 controls the air pump 102 to stop working, after waiting for 30 seconds, the control main board 4 will connect the connection circuit between the two conductive blocks 116. If the two conductive blocks 116 are separated, at this time the connection circuit is in an open state, and the control main board 4 cannot receive the closed electrical signal of this connection circuit. Therefore, the control main board 4 will immediately send a voice reminder through its own voice module, reminding the personnel that there is a leak at the glue application position. On the contrary, when the glue application quality at this glue application position is good and there is no glue application leak, the air pressure in the pressure measuring hole 112 will not decrease. Therefore, the position of the conductive block 116 in the pressure measuring hole 112 will not change, and the two conductive blocks 116 remain in contact. After the control main board 4 receives the closed electrical signal of the conductive block 116 connection circuit, the control main board 4 will not control the voice module to perform the reminder work. 40 seconds after the control main board 4 controls the air pump 102 to stop working, the control main board 4 will control the connection circuit between the two conductive blocks 116 to be disconnected, control the normally open solenoid valve 106 to be de-energized and opened, control the normally closed solenoid valve 114 to be energized for 5 seconds regularly (to discharge the excess air in the comparison hole 113), and control the electric control valve 117 to open, so that the air pressure inside the sealing cover 3 returns to the normal pressure state. Subsequently, the robotic arm 1 controls the sealing cover 3 to disengage from the white vehicle body and performs the detection work on the next glue application position;

[0044] Among them, when there are defects at the glue application position, the control main board 4 will control the voice module to give a reminder. After the glue application detection work at the current position is completed by relevant personnel (that is, after the robotic arm 1 drives the sealing cover 3 away from the white vehicle body), relevant personnel should control the robotic arm 1 to pause, record the glue application defect position according to the position of the light beads 123 displayed, and then control the robotic arm 1 to resume work. The robotic arm 1 performs the detection work at the next glue application position. At the same time, relevant personnel can promptly repair the detected defects.

[0045] 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. An equipment for detecting the gluing quality of an automobile body-in-white, comprising a robotic arm and a mounting bracket installed at the movable end of the robotic arm, characterized in that, It further includes: A sealing cover, detachably installed at the end of the mounting bracket away from the robotic arm. The side wall of the sealing cover is equipped with a control main board. The sealing cover is provided with a starting component, and the starting component is electrically connected to the control main board; A movable block, arranged inside the sealing cover, and a laser thickness gauge probe is installed on the end face of the movable block. The detection end of the laser thickness gauge probe is arranged inside the movable block. The sealing cover is provided with a driving mechanism, and the driving mechanism drives the movable block to displace horizontally and longitudinally; A conical gas nozzle, arranged on one side of the laser thickness gauge probe and fixedly inserted into the end face of the movable block. The sealing cover is provided with a gas supply mechanism, and the gas outlet end of the gas supply mechanism is communicated with the conical gas nozzle; A leakage detection unit, installed on the side wall of the sealing cover, and the leakage detection unit is communicated with the inside of the sealing cover; A defect positioning mechanism, installed outside the sealing cover. The control main board controls the operation of the defect positioning mechanism according to the electrical signal output by the laser thickness gauge probe; The gas supply mechanism includes a mounting cavity opened on the upper side inside the sealing cover. A gas pump is fixedly installed inside the mounting cavity. The gas outlet end of the gas pump is fixedly communicated with an air delivery pipe. The air delivery pipe is communicated with a connecting hose at its gas outlet end, and the connecting hose is communicated with the conical gas nozzle. The gas pump is electrically connected to the control main board. An exhaust hole is opened on the side wall of the sealing cover, and a normally open solenoid valve electrically connected to the control main board is installed inside the exhaust hole; The leakage detection unit includes two barrels fixedly installed on the outer side wall of the sealing cover. A pressure measuring hole and a comparison hole are opened on the side wall of the sealing cover, and both the pressure measuring hole and the comparison hole are communicated with the inside of the barrel on the same side. A normally closed solenoid valve is installed inside the comparison hole. An elastic telescopic component is jointly installed on the pressure measuring hole and the comparison hole and the barrel on the same side. The movable ends of the two elastic telescopic components are both installed with insulating blocks, and both insulating blocks are slidably connected to the side wall of the barrel on the same side. Conductive blocks are installed at the opposite ends of the two insulating blocks, and the opposite ends of the two conductive blocks are in sliding contact. The two conductive blocks are electrically connected to the control main board. An electrically controlled valve is installed inside the air delivery pipe, and both the electrically controlled valve and the normally closed solenoid valve are electrically connected to the control main board.

2. A quality inspection device for the automotive body in white gluing according to claim 1, characterized in that, The starting component includes a frame-shaped gasket fixedly installed at the end of the sealing cover away from the robotic arm. An installation groove is opened inside the frame-shaped gasket, and a pressure switch is arranged inside the installation groove. The pressure switch is installed at the end of the sealing cover and is electrically connected to the control main board.

3. A quality inspection device for the adhesive application of an automotive body-in-white according to claim 1, characterized in that, The driving mechanism includes a strip-shaped plate arranged inside the sealing cover. A strip-shaped hole is opened on the end face of the strip-shaped plate, and the movable block is slidably arranged inside the strip-shaped hole. A first screw driving component is installed inside the strip-shaped hole, and the first screw driving component is in transmission connection with the movable block. The first screw driving component drives the movable block to move horizontally inside the strip-shaped hole. The sealing cover is provided with a second screw driving component, and the second screw driving component is in transmission connection with the strip-shaped plate. The second screw driving component drives the strip-shaped plate to move horizontally and transversely inside the sealing cover. Both the first screw driving component and the second screw driving component are electrically connected to the control main board.

4. A quality inspection device for the gluing of automotive body-in-white according to claim 1, characterized in that, The defect positioning mechanism includes a mounting cover sleeved outside the control main board, and the mounting cover is fixed on the outer side wall of the sealing cover. A fixing frame is fixedly installed inside the mounting cover, and a plurality of lamp beads are fixedly installed on the side wall of the fixing frame. A plurality of through holes are formed in the side wall of the mounting cover, and the light-emitting ends of the respective lamp beads extend to the inner sides of the corresponding through holes. The control main board controls the operation of the respective lamp beads according to the electrical signals output by the laser thickness measuring probe. An early warning component is installed inside the mounting cover.

5. A quality inspection device for automotive body-in-white gluing according to claim 1, characterized in that, Both of the two elastic telescopic components include sliding blocks slidably arranged inside the barrel, and the insulating blocks are fixedly connected to the sliding blocks. Springs are fixedly arranged between the sliding blocks and the barrel. One end of the sliding block away from the spring is fixedly connected to a connecting rod. Pistons are slidably connected inside both the pressure measuring hole and the comparison hole, and the pistons are fixedly connected to the connecting rod.

6. A quality inspection device for automotive body gluing according to claim 4, characterized in that, The early warning component includes an insulating groove plate fixedly installed on the inner wall of the mounting cover, and a photosensitive resistor strip is fixedly installed inside the insulating groove plate. An electromagnetic switch is fixedly installed on the inner wall of the mounting cover, and the electromagnetic switch is electrically connected to the photosensitive resistor strip through the control main board.

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