A welding error prevention device for welding parts of new energy vehicles

Abstract

The present invention belongs to the technical field of welding equipment for new energy vehicles, and in particular, relates to a welding error prevention device for welding parts of new energy vehicles, comprising a sleeve for connecting to the welding end of a welding robot, the top end of the sleeve is fixedly connected with a sealing rubber sleeve, the outer wall of the sleeve is movably sleeved with a moving sleeve, the outer wall of the moving sleeve is fixedly connected with a rubber cover, the inner wall of the rubber cover is fixedly connected with a plurality of elastic reset rods, the top end of the elastic reset rod is fixedly connected with the outer surface of the moving cover, the outer wall of the sleeve is fixedly connected with a U-shaped frame, and the inner wall of the U-shaped frame is fixedly connected with an electric push rod. The present invention enables the welding error prevention device for welding parts of new energy vehicles to have the functions of uniform heat dissipation at the welding position, preheating the welding position in advance, and detecting the sealing of the welding position after welding, thereby effectively reducing welding defects of welding parts of new energy vehicles, and being able to effectively improve the quality and qualified rate of welding of welding parts of new energy vehicles.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy vehicle welding equipment, and in particular relates to a welding error prevention device for welding parts of new energy vehicles. Background Art

[0002] New energy vehicles refer to vehicles that use unconventional vehicle fuels as their power source, or use conventional vehicle fuels but adopt new on-board power devices. They include pure electric vehicles, hybrid vehicles, fuel cell electric vehicles, etc., and new energy vehicles also need to use welding equipment to weld welded parts during the production process. At the same time, in order to prevent welding errors from causing welding failures during the welding process, welding error-proofing devices are often used during the welding process. For example, the authorized patent number is CN220498224U, which discloses a welding error-proofing device for welding parts of new energy vehicles.

[0003] At present, during the welding process of new energy vehicle welded parts, due to the influence of moisture in the welding materials, moisture will decompose into hydrogen atoms at high temperature, and the hydrogen atoms will dissolve into liquid metal. Then, during the cooling process, the solubility of hydrogen decreases and precipitates to form pores. If there are too many pores, serious defects will occur in the welding position of new energy vehicle welded parts, affecting the welding quality of new energy vehicle welded parts.

[0004] In addition, during the welding process, the center of the weld receives more heat than the edge, resulting in uneven heating. When cooling after welding, there is also a long period of uneven cooling, which makes the welding position of new energy vehicle welded parts prone to damage defects, further affecting the quality and pass rate of new energy vehicle welded parts.

[0005] To this end, we propose a welding error prevention device for new energy vehicle welding parts to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to provide a welding error prevention device for welding parts of new energy vehicles in view of the above problems.

[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a welding error prevention device for welding parts of new energy vehicles, comprising a sleeve for connecting to the welding end of a welding robot, the top end of the sleeve is fixedly connected with a sealing rubber sleeve, the outer wall of the sleeve is movably sleeved with a moving sleeve, the outer wall of the moving sleeve is fixedly connected with a rubber cover, the inner wall of the rubber cover is fixedly connected with a plurality of elastic reset rods, the top end of the elastic reset rod is fixedly connected to the outer surface of the moving sleeve, the outer wall of the sleeve is fixedly connected with a U-shaped frame, the inner wall of the U-shaped frame is fixedly connected with an electric push rod, the moving end of the electric push rod is fixedly connected to the upper surface of the moving sleeve, the outer wall of the U-shaped frame is fixedly connected with a hollow box, the inner wall of the hollow box is provided with a welding error prevention mechanism, the outer wall of the hollow box is fixedly connected with a marking mechanism, the top end of the U-shaped frame is fixedly connected with a PLC controller, and the inner wall of the sleeve is connected with a limiting mechanism.

[0008] In the above-mentioned welding error prevention device for welding parts of new energy vehicles, the welding error prevention mechanism includes a partition and a supporting mesh plate fixedly connected to the inner wall of the hollow box, the upper surface of the supporting mesh plate is fixedly connected to an activated carbon filter plate, the bottom end of the hollow box is fixedly connected to a normally closed electric valve and an exhaust one-way valve, the bottom ends of the normally closed electric valve and the exhaust one-way valve are jointly fixedly connected to an arc tube, the bottom end of the arc tube is fixedly connected to an air guide pipe, the bottom end of the air guide pipe passes through the inner wall of the rubber cover, the upper surface of the partition is fixedly connected to an air pump, the air inlet end of the air pump is fixedly connected to a bent pipe, the upper surface of the partition is fixedly connected to an electromagnetic valve, the top end of the electromagnetic valve is fixedly connected to the bottom end of the bent pipe, the air outlet end of the air pump is fixedly connected to a preheating component, and the bottom end of the hollow box is fixedly connected to a trigger component.

[0009] In the above-mentioned device for preventing welding errors of welding parts of new energy vehicles, the preheating component includes a metal tube fixedly connected to the air outlet end of the vacuum pump, the top end of the metal tube passes through the upper surface of the hollow box, and is fixedly connected to a universal serpentine tube, the tube wall of the metal tube is fixedly sleeved with a heat insulation sleeve, the outer wall of the heat insulation sleeve is fixedly connected to the inner wall of the hollow box, the tube wall of the metal tube is fixedly sleeved with a plurality of heat dissipation mesh plates, the outer walls of the plurality of heat dissipation mesh plates are provided with a plurality of through holes, and the hole walls of the through holes are fixedly connected with an electric heating tube, the outer wall of the heat insulation sleeve is provided with a mounting hole matching the outer wall of the electric heating tube, and the outer wall of the universal serpentine tube is fixedly connected with a temperature sensor for detecting the airflow temperature of the preheating mechanism.

[0010] In the above-mentioned new energy vehicle welding error prevention device, the trigger assembly includes a hollow cover fixedly connected to the bottom end of the hollow box, the bottom end of the hollow cover is fixedly connected to an air pressure sensor, and the top end of the hollow cover and the air inlet end of the exhaust check valve are fixedly connected to a filter block.

[0011] In the above-mentioned welding error prevention device for new energy vehicle welding parts, the marking mechanism includes a paint box fixedly connected to the outer wall of the hollow box, the upper surface of the paint box is fixedly connected to an air-guiding electric valve, the top of the air-guiding electric valve is fixedly connected to the tube wall of the universal serpentine tube, the bottom end of the paint box is fixedly connected to a conduit, the bottom end of the conduit passes through the inner wall of the rubber cover, and is fixedly connected to a spray nozzle.

[0012] In the above-mentioned device for preventing welding errors of welding parts of new energy vehicles, the limiting mechanism includes a rubber pad fixedly connected to the inner wall of the sleeve, the outer wall of the sleeve is provided with two threaded holes, and the hole walls of the threaded holes are threadedly connected with positioning bolts, the outer wall of the positioning bolts is sleeved with a protective rubber sleeve, and the outer wall of the protective rubber sleeve is fixedly connected to the inner wall of the sleeve.

[0013] In the above-mentioned welding error prevention device for new energy vehicle welding parts, the top feed hole of the paint box is provided with a connecting thread, and the thread is connected to a first sealing plug, the bottom side wall of the hollow box is provided with a threaded through hole, and the hole wall of the threaded through hole is threadedly connected to a second sealing plug.

[0014] In the above-mentioned device for preventing welding errors of welding parts of new energy vehicles, a sealing hollow ring is fixedly connected to the bottom end of the rubber cover, and the sealing hollow ring is a fluororubber ring.

[0015] Compared with the existing technology, the advantages of a welding error prevention device for new energy vehicle welding parts are:

[0016] 1. Through the welding limit mechanism, error prevention mechanism and electric push rod, when the new energy vehicle welding parts are welded, the welding error prevention device is installed on the welding end of the welding robot through the limit mechanism, and then the welding error prevention mechanism is used to suck air from the welding position to generate a negative pressure environment inside the hollow cover, so that the gas melted in the liquid metal at the welding position is discharged preferentially under the negative pressure environment, avoiding the formation of pores after the liquid metal at the welding position solidifies. In addition, the gap between the sealing hollow ring and the new energy vehicle welding parts is also sucked from the outside to supplement the air, so that the internal space of the rubber cover forms a flowing air state. The flowing air can quickly realize the cooling of the welding position, and accelerate the heat loss, which helps the weld to dissipate heat evenly and reduce welding residual stress and deformation. This can make the microstructure of the weld more uniform and improve the quality and performance of the weld. This mechanism enables the welding error prevention device to have the function of uniform heat dissipation at the welding position, effectively reducing the residual stress and deformation at the welding position, thereby effectively improving the quality and qualified rate of welding of new energy vehicle welding parts.

[0017] 2. Through the preheating component, while the new energy vehicle welding parts are being welded, the vacuum pump sucks the hot air from the welding position and treats it through the activated carbon filter plate. The hot air then passes through the metal pipe into the universal serpentine tube. At the same time, the preheating component adjusts the temperature of the hot air so that the temperature of the hot air ejected from the universal serpentine tube meets the requirement for preheating the welding position of the new energy vehicle welding parts. By preheating the welding position of the new energy vehicle welding parts, the possibility of cold cracks in the weld and the heat affected zone is reduced. Moreover, uniform preheating helps to reduce the residual stress generated during the welding process and improve the stability and durability of the welded structure. In addition, preheating can also make the microstructure of the welding position more uniform and improve the strength and toughness of the weld position. At the same time, preheating helps to increase the penetration depth of the weld, so that the weld and the parent material are better integrated, and the bearing capacity of the welding position is improved, thereby reducing the probability of welding defects at the welding position of the new energy vehicle welding parts. This mechanism enables the welding error prevention device to have the function of efficient preheating of the welding position, thereby improving the quality and qualified rate of welding of new energy vehicle welding parts.

[0018] 3. Through the set trigger components and marking mechanisms, when the welding of the new energy vehicle welding parts is completed, the PLC controller controls the electric push rod to extend, so that the welding end of the welding robot is retracted into the rubber cover, and then the welding robot pushes the sealing hollow ring through the sleeve and the rubber cover to close to the welding position of the new energy vehicle welding parts, so as to realize the sealing detection of the welding position of the new energy vehicle welding parts, and then fills a certain amount of air into the rubber cover. After a period of time, the air pressure sensor sends an electrical signal to feedback the air pressure in the rubber cover. If the air pressure does not change, the welding position of the new energy vehicle welding parts is qualified. Otherwise, the PLC controller controls the marking mechanism to spray paint on the welding position of the new energy vehicle welding parts to mark defects, so that maintenance personnel can conveniently perform subsequent repair welding. This mechanism enables the welding error prevention device to have the function of sealing detection of the welding position of the new energy vehicle welding parts, effectively improving the quality and qualified rate of welding of new energy vehicle welding parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of a welding error prevention device for welding parts of new energy vehicles provided by the present invention;

[0020] Figure 2 It is a structural schematic diagram of a cross-section of a hollow box in a welding error prevention device for a new energy vehicle welding part provided by the present invention;

[0021] Figure 3 It is a partially enlarged structural schematic diagram of a welding error prevention device for a new energy vehicle welding part provided by the present invention;

[0022] Figure 4 It is a structural schematic diagram of part A of a welding error prevention device for welding parts of new energy vehicles provided by the present invention;

[0023] Figure 5 It is a structural schematic diagram of a preheating component in a welding error prevention device for a new energy vehicle welded part provided by the present invention.

[0024] In the figure: 1 sleeve, 2 sealing rubber sleeve, 3 moving sleeve, 4 rubber cover, 5 welding error prevention mechanism, 51 partition, 52 supporting mesh plate, 53 activated carbon filter plate, 54 normally closed electric valve, 55 exhaust check valve, 56 arc tube, 57 air guide pipe, 58 suction pump, 59 elbow, 510 solenoid valve, 6 marking mechanism, 61 paint box, 62 air guide electric valve, 63 conduit, 64 injection nozzle, 7 limit mechanism, 71 rubber pad, 72 positioning bolt, 73 protective rubber sleeve, 8 preheating component, 81 metal pipe, 82 universal serpentine pipe, 83 insulation sleeve, 84 heat dissipation mesh plate, 85 electric heating pipe, 86 temperature sensor, 9 trigger component, 91 hollow cover, 92 air pressure sensor, 93 filter block, 10 elastic reset rod, 11 U-shaped frame, 12 electric push rod, 13 hollow box, 14 PLC controller, 15 first sealing plug, 16 second sealing plug, 17 sealing hollow ring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] like Figure 1-Figure 5 As shown, a welding error prevention device for welding parts of new energy vehicles includes a sleeve 1 for connecting to the welding end of a welding robot, a sealing rubber sleeve 2 is fixedly connected to the top of the sleeve 1, a movable sleeve 3 is movably sleeved on the outer wall of the sleeve 1, a rubber cover 4 is fixedly connected to the outer wall of the movable sleeve 3, a sealing hollow ring 17 is fixedly connected to the bottom end of the rubber cover 4, and the sealing hollow ring 17 is a fluororubber ring. The fluororubber ring has excellent high temperature resistance and wear resistance to ensure the use effect of the sealing hollow ring 17, and the bottom end of the rubber cover 4 is fixedly connected to the sealing hollow ring 17. The sealing hollow ring 17 is a fluororubber ring. The fluororubber ring has excellent high temperature resistance and wear resistance, which ensures the effect of the use of the sealing hollow ring 17. The inner wall of the rubber cover 4 is fixedly connected with a plurality of elastic reset rods 10. The top of the elastic reset rod 10 is fixedly connected with the outer surface of the movable sleeve 3. The outer wall of the sleeve 1 is fixedly connected with a U-shaped frame 11. The inner wall of the U-shaped frame 11 is fixedly connected with an electric push rod 12. The moving end of the electric push rod 12 is fixedly connected with the upper surface of the movable sleeve 3. The outer wall of the U-shaped frame 11 is fixedly connected with a hollow box 13.

[0027] The inner wall of the hollow box 13 is provided with a welding error prevention mechanism 5, which includes a partition 51 and a supporting mesh plate 52 fixedly connected to the inner wall of the hollow box 13, and an activated carbon filter plate 53 is fixedly connected to the upper surface of the supporting mesh plate 52. The bottom end of the hollow box 13 is fixedly connected to a normally closed electric valve 54 and an exhaust check valve 55, and the bottom ends of the normally closed electric valve 54 and the exhaust check valve 55 are fixedly connected to an arc tube 56, and the bottom end of the arc tube 56 is fixedly connected to an air guide pipe 57, and the bottom end of the air guide pipe 57 passes through the inner wall of the rubber cover 4, and the upper surface of the partition 51 is fixedly connected to an air pump 58, and the air inlet end of the air pump 58 is fixedly connected to a curved pipe 5 9. The upper surface of the partition 51 is fixedly connected with a solenoid valve 510, the top of the solenoid valve 510 is fixedly connected with the bottom end of the elbow 59, the bottom end of the hollow box 13 is fixedly connected with a trigger assembly 9, the trigger assembly 9 includes a hollow cover 91 fixedly connected with the bottom end of the hollow box 13, the bottom end of the hollow cover 91 is fixedly connected with an air pressure sensor 92, the top of the hollow cover 91 and the air inlet end of the exhaust check valve 55 are fixedly connected with a filter block 93. This mechanism enables the welding error prevention device to have the function of uniform heat dissipation at the welding position, effectively reducing the residual stress and deformation at the welding position, thereby effectively improving the welding quality and qualified rate of new energy vehicle welded parts.

[0028] The air outlet end of the vacuum pump 58 is fixedly connected to the preheating component 8, and the preheating component 8 includes a metal tube 81 fixedly connected to the air outlet end of the vacuum pump 58. The top end of the metal tube 81 passes through the upper surface of the hollow box 13 and is fixedly connected to a universal serpentine tube 82. The tube wall of the metal tube 81 is fixedly sleeved with a heat insulation sleeve 83. The outer wall of the heat insulation sleeve 83 is fixedly connected to the inner wall of the hollow box 13. The tube wall of the metal tube 81 is fixedly sleeved with a plurality of heat dissipation mesh plates 84. The outer walls of the plurality of heat dissipation mesh plates 84 are provided with a plurality of through holes, and the hole walls of the through holes are fixedly connected with an electric heating tube 85. The outer wall of the heat insulation sleeve 83 is provided with a mounting hole that matches the outer wall of the electric heating tube 85. The outer wall of the universal serpentine tube 82 is fixedly connected with a temperature sensor 86 for detecting the airflow temperature of the preheating mechanism. This mechanism enables the welding error prevention device to have the function of lifting the welding position for efficient preheating, thereby improving the welding quality and pass rate of the welding parts of new energy vehicles.

[0029] The outer wall of the hollow box 13 is fixedly connected to a marking mechanism 6, which includes a paint box 61 fixedly connected to the outer wall of the hollow box 13, an upper surface of the paint box 61 is fixedly connected to an air guide electric valve 62, the top of the air guide electric valve 62 is fixedly connected to the tube wall of the universal serpentine tube 82, the bottom end of the paint box 61 is fixedly connected to a conduit 63, the bottom end of the conduit 63 passes through the inner wall of the rubber cover 4, and is fixedly connected to a spray nozzle 64. This mechanism can mark defects at the welding defect locations of new energy vehicle welded parts and facilitate maintenance personnel to rework.

[0030] The top of the U-shaped frame 11 is fixedly connected to a PLC controller 14, the inner wall of the sleeve 1 is connected to a limiting mechanism 7, the limiting mechanism 7 includes a rubber pad 71 fixedly connected to the inner wall of the sleeve 1, the outer wall of the sleeve 1 is provided with two threaded holes, and the hole walls of the threaded holes are threadedly connected with positioning bolts 72, the outer wall of the positioning bolts 72 is sleeved with a protective rubber sleeve 73, the outer wall of the protective rubber sleeve 73 is fixedly connected to the inner wall of the sleeve 1, and the limiting mechanism 7 can improve the stability of the connection of the sleeve 1.

[0031] The top feed hole of the paint box 61 is provided with a connecting thread, and the thread is connected to a first sealing plug 15. The bottom side wall of the hollow box 13 is provided with a threaded through hole, and the hole wall of the threaded through hole is threadedly connected to a second sealing plug 16. Opening the first sealing plug 15 can facilitate the replenishment of paint, and opening the second sealing plug 16 can facilitate the cleaning of impurities in the hollow box 13.

[0032] The solenoid valve 510, the normally closed electric valve 54, the vacuum pump 58, the electric heating tube 85, the air-conducting electric valve 62 and the electric push rod 12 are electrically connected to the output end of the PLC controller 14 through wires, and the temperature sensor 86 and the air pressure sensor 92 are electrically connected to the input end of the PLC controller 14 through wires. The temperature sensor 86 and the air pressure sensor 92 can convert the physical quantities of temperature and air pressure into electrical signals and transmit them to the PLC controller 14. The PLC controller 14 controls the opening and closing of different devices at the output end according to these electrical signals. The above-mentioned devices and electrical connections are all existing technologies and will not be repeated here.

[0033] The operating principle of the present invention is described as follows: when the new energy vehicle welded parts are welded by the welding robot, the sleeve 1 is firstly sleeved on the welding end of the welding robot, and then the positioning bolt 72 is rotated to fix it. At the same time, the rubber pad 71 and the protective rubber sleeve 73 can increase the friction of the contact surface, and can prevent the outer wall of the welding end of the welding robot from being squeezed and damaged. Then, the electric push rod 12 is controlled to contract by the PLC controller 14, and the electric push rod 12 drives the moving sleeve 3 to move, and the moving sleeve 3 drives the rubber cover 4 and the sealing hollow ring 17 to move, so as to ensure that the welding end of the welding robot is exposed, and facilitate the welding of the new energy vehicle welded parts by the welding robot, and avoid the rubber cover 4 and the sealing hollow ring 17 from hindering the welding of the new energy vehicle welded parts. At the same time, the distance between the sealing hollow ring 17 and the surface of the new energy vehicle welded parts is controlled within the range of 3-5 mm;

[0034] When welding the new energy vehicle welded parts, the PLC controller 14 also controls the vacuum pump 58, the normally closed electric valve 54 and the solenoid valve 510 to be powered on and opened. The vacuum pump 58 sucks the air in the rubber cover 4 through the solenoid valve 510, the hollow box 13, the normally closed electric valve 54, the arc tube 56 and the air guide tube 57, so that a negative pressure environment is generated inside the hollow cover 91, so that the gas integrated into the liquid metal at the welding position is preferentially discharged under the negative pressure environment, and the formation of pores after the liquid metal at the welding position solidifies is avoided. In addition, the gap between the sealing hollow ring 17 and the new energy vehicle welded parts also sucks the outside air to supplement, so that the internal space of the rubber cover 4 forms a flowing air state, and the flowing air can quickly realize the cooling of the welding position, and by accelerating the dissipation of heat, it helps the weld to dissipate heat evenly, reduce welding residual stress and deformation, which can make the microstructure of the weld more uniform, improve the quality and performance of the weld, and this mechanism enables the welding error prevention device to have the function of uniform heat dissipation at the welding position, effectively reduce the residual stress and deformation at the welding position, and thus effectively improve the quality and qualified rate of welding of new energy vehicle welded parts.

[0035] While welding the new energy vehicle welding parts, the vacuum pump 58 sucks the hot air from the welding position and processes it through the activated carbon filter plate 53. The hot air then passes through the metal tube 81 and enters the universal serpentine tube 82. At the same time, the temperature sensor 86 detects the temperature of the hot air. The temperature sensor 86 sends an electrical signal to the PLC controller 14. The PLC controller 14 controls the heating power of the electric heating tube 85 according to the electrical signal. The electric heating tube 85 adjusts the temperature of the recovered hot air through the heat dissipation mesh plate 84 and the metal tube 81, so that the temperature of the hot air ejected from the universal serpentine tube 82 meets the requirement for preheating the welding position of the new energy vehicle welding parts. Position preheating can reduce the cooling rate during welding and reduce the possibility of cold cracks in the weld and heat-affected zone. Uniform preheating helps to reduce the residual stress generated during welding and improve the stability and durability of the welded structure. In addition, preheating can make the microstructure of the welding position more uniform and improve the strength and toughness of the weld position. At the same time, preheating helps to increase the penetration depth of the weld, better integrate the weld with the parent material, and improve the bearing capacity of the welding position, thereby reducing the probability of welding defects at the welding position of new energy vehicle welded parts. This mechanism enables the welding error prevention device to have the function of efficient preheating of the welding position, thereby improving the welding quality and pass rate of new energy vehicle welded parts.

[0036] When the welding of the new energy vehicle welding parts is completed, the PLC controller 14 controls the electric push rod 12 to extend, the electric push rod 12 pushes the movable sleeve 3 to move, and the movable sleeve 3 pushes the rubber cover 4 to extend, so that the welding end of the welding robot is retracted into the rubber cover 4, and then the welding robot pushes the sealing hollow ring 17 through the sleeve 1 and the rubber cover 4 to close to the welding position of the new energy vehicle welding parts, so as to realize the sealing detection of the welding position of the new energy vehicle welding parts, and then the PLC controller 14 controls the vacuum pump 58 to reversely transport air, and then the air is transported to the rubber cover 4 through the hollow box 13, the exhaust one-way valve 55, the arc tube 56 and the air guide tube 57. At this time, the air acts on the air pressure sensor 92 through the filter block 93, and the air pressure sensor 92 monitors the air pressure in the rubber cover 4 in real time. When the air pressure in the rubber cover 4 reaches the air pressure sensor When the preset air pressure threshold is reached, the PLC controller 14 sends an electrical signal to the PLC controller 14, and the PLC controller 14 promptly cuts off the power to the vacuum pump 58 according to the electrical signal. After a period of time, the air pressure sensor 92 sends an electrical signal to feedback the air pressure in the rubber cover 4. If the air pressure does not change, the welding position of the new energy vehicle welding part is qualified. Otherwise, the PLC controller 14 controls the air guide electric valve 62 and the vacuum pump 58 to open, and the vacuum pump 58 conveys air through the air guide electric valve 62 into the paint box 61. Then the paint in the paint box 61 is sprayed to the welding position of the new energy vehicle welding part through the conduit 63 and the spray nozzle 64 to mark the defect, so that the maintenance personnel can conveniently perform repair welding later. This mechanism enables the welding error prevention device to have the function of detecting the sealing of the welding position of the new energy vehicle welding part, effectively improving the welding quality and qualified rate of the new energy vehicle welding parts.

[0037] 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 principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A welding error prevention device for welding parts of new energy vehicles, comprising a sleeve (1) for connecting to a welding end of a welding robot, characterized in that: The top end of the sleeve (1) is fixedly connected to a sealing rubber sleeve (2); the outer wall of the sleeve (1) is movably sleeved with a moving sleeve (3); the outer wall of the moving sleeve (3) is fixedly connected to a rubber cover (4); the inner wall of the rubber cover (4) is fixedly connected to a plurality of elastic reset rods (10); the top ends of the elastic reset rods (10) are fixedly connected to the outer surface of the moving sleeve (3); the outer wall of the sleeve (1) is fixedly connected to a U-shaped frame (11); the inner wall of the U-shaped frame (11) is fixedly connected to an electric push rod (12); the moving end of the electric push rod (12) is fixedly connected to the upper surface of the moving sleeve (3); the outer wall of the U-shaped frame (11) is fixedly connected to a hollow box (13); the inner wall of the hollow box (13) is provided with a welding error prevention mechanism (5); the outer wall of the hollow box (13) is fixedly connected to a marking mechanism (6); the top end of the U-shaped frame (11) is fixedly connected to a PLC controller (14); and the inner wall of the sleeve (1) is connected to a limiting mechanism (7); The welding error prevention mechanism (5) comprises a partition plate (51) and a supporting mesh plate (52) fixedly connected to the inner wall of the hollow box (13); an activated carbon filter plate (53) is fixedly connected to the upper surface of the supporting mesh plate (52); a normally closed electric valve (54) and an exhaust check valve (55) are fixedly connected to the bottom end of the hollow box (13); the bottom ends of the normally closed electric valve (54) and the exhaust check valve (55) are fixedly connected to an arc-shaped pipe (56); the bottom end of the arc-shaped pipe (56) is fixedly connected to an air guide pipe (57); The bottom end of the air guide pipe (57) passes through the inner wall of the rubber cover (4); the upper surface of the partition (51) is fixedly connected to an air pump (58); the air inlet end of the air pump (58) is fixedly connected to a curved pipe (59); the upper surface of the partition (51) is fixedly connected to an electromagnetic valve (510); the top end of the electromagnetic valve (510) is fixedly connected to the bottom end of the curved pipe (59); the air outlet end of the air pump (58) is fixedly connected to a preheating component (8); and the bottom end of the hollow box (13) is fixedly connected to a trigger component (9); The preheating assembly (8) comprises a metal tube (81) fixedly connected to the air outlet end of the vacuum pump (58); the top end of the metal tube (81) passes through the upper surface of the hollow box (13) and is fixedly connected to a universal serpentine tube (82); a heat insulating sleeve (83) is fixedly sleeved on the tube wall of the metal tube (81); the outer wall of the heat insulating sleeve (83) is fixedly connected to the inner wall of the hollow box (13); a plurality of heat dissipation mesh plates (84) are fixedly sleeved on the tube wall of the metal tube (81); a plurality of through holes are formed on the outer walls of the plurality of heat dissipation mesh plates (84); and an electric heating tube (85) is fixedly connected to the hole walls of the through holes; a mounting hole matching the outer wall of the electric heating tube (85) is formed on the outer wall of the heat insulating sleeve (83); and a temperature sensor (86) for detecting the airflow temperature of the preheating mechanism is fixedly connected to the outer wall of the universal serpentine tube (82); The trigger assembly (9) comprises a hollow cover (91) fixedly connected to the bottom end of the hollow box (13); the bottom end of the hollow cover (91) is fixedly connected to an air pressure sensor (92); the top end of the hollow cover (91) and the air inlet end of the exhaust check valve (55) are fixedly connected to a filter block (93); The marking mechanism (6) comprises a paint box (61) fixedly connected to the outer wall of the hollow box (13); the upper surface of the paint box (61) is fixedly connected to an air-conducting electric valve (62); the top end of the air-conducting electric valve (62) is fixedly connected to the wall of a universal serpentine tube (82); the bottom end of the paint box (61) is fixedly connected to a conduit (63); the bottom end of the conduit (63) passes through the inner wall of the rubber cover (4) and is fixedly connected to an injection nozzle (64).

2. A welding error prevention device for welding parts of new energy vehicles according to claim 1, characterized in that: The limiting mechanism (7) comprises a rubber pad (71) fixedly connected to the inner wall of the sleeve (1); the outer wall of the sleeve (1) is provided with two threaded holes, and the hole walls of the threaded holes are threadedly connected with positioning bolts (72); the outer wall of the positioning bolt (72) is sleeved with a protective rubber sleeve (73), and the outer wall of the protective rubber sleeve (73) is fixedly connected to the inner wall of the sleeve (1).

3. A welding error prevention device for welding parts of new energy vehicles according to claim 1, characterized in that: The top feed hole of the paint box (61) is provided with a connecting thread, and a first sealing plug (15) is threadedly connected thereto; the bottom side wall of the hollow box (13) is provided with a threaded through hole, and a second sealing plug (16) is threadedly connected to the hole wall of the threaded through hole.

4. The welding error prevention device for welding parts of new energy vehicles according to claim 1 is characterized in that: A sealing hollow ring (17) is fixedly connected to the bottom end of the rubber cover (4), and the sealing hollow ring (17) is a fluororubber ring.

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