Welding apparatus

Abstract

The embodiment of the present application provides a kind of welding equipment, the welding equipment includes: high frequency inverter welder and welding torch.Welding torch is connected with high frequency inverter welder by cable, welding torch has electrode assembly, electrode assembly includes first electrode cap and second electrode cap, first electrode cap has first welding contact surface for being contacted with workpiece, second electrode cap has second welding contact surface for being contacted with workpiece, the outer contour of first welding contact surface is first outer contour, the outer contour of second welding contact surface is second outer contour, first outer contour and second outer contour are both circular.According to the welding equipment of the embodiment of the present application, the welding indentation depth of workpiece surface can be reduced, the appearance weld quality of workpiece is improved, and the structural strength of workpiece is improved.

Description

Technical Field

[0001] This application relates to the field of welding technology, and in particular to a welding device. Background Technology

[0002] In vehicle manufacturing, the quality of surface welds directly affects structural strength. Welding equipment in related technologies often creates deep indentations on the workpiece surface, resulting in poor-quality surface welds and impacting the workpiece's structural strength. Utility Model Content

[0003] This application provides a welding device that, when used to weld workpieces, can reduce the depth of weld indentations on the workpiece surface and improve the appearance and weld quality of the workpiece.

[0004] A welding apparatus according to a first aspect of this application includes: a high-frequency inverter welding machine; a welding torch connected to the high-frequency inverter welding machine via a cable; the welding torch having an electrode assembly, the electrode assembly including a first electrode cap and a second electrode cap disposed opposite to and spaced apart from each other; the first electrode cap having a first welding contact surface for contacting a workpiece; the second electrode cap having a second welding contact surface for contacting a workpiece; the outer contour of the first welding contact surface being a first outer contour; the outer contour of the second welding contact surface being a second outer contour; and both the first outer contour and the second outer contour being circular.

[0005] According to the welding equipment of this application, by providing a high-frequency inverter welding machine, a high-frequency current can be released to the workpiece to be welded by using a cable-connected motor module. Combined with the skin effect and proximity effect of the high-frequency current released by the high-frequency inverter welding machine, the current density on the surface of the welding contact surface is further increased, which can shorten the welding time, reduce the degree of welding deformation on the workpiece surface, reduce the depth of welding indentation on the workpiece surface, improve the appearance and weld quality of the workpiece, and improve the structural strength of the workpiece.

[0006] According to some embodiments of this application, the diameter of the first outer contour ranges from φ8mm to φ10mm.

[0007] In the above technical solution, by making the diameter range of the first outer contour greater than 8mm, it is beneficial to further increase the current density on the surface of the first welding contact surface, which can shorten the welding time, reduce the degree of welding deformation on the workpiece surface, reduce the depth of welding indentation on the workpiece surface, improve the appearance and weld quality of the workpiece, and improve production efficiency; by making the diameter range of the first outer contour less than 10mm, heat loss can be reduced and production costs can be saved.

[0008] According to some embodiments of this application, the diameter of the second outer contour ranges from φ8mm to φ10mm.

[0009] In the above technical solution, by making the diameter range of the second outer contour greater than 8mm, the current density on the surface of the second welding contact surface is further increased, which can shorten the welding time, reduce the degree of welding deformation on the workpiece surface, reduce the depth of welding indentation on the workpiece surface, improve the appearance and weld quality of the workpiece, and improve production efficiency; by making the diameter range of the first outer contour less than 10mm, heat loss can be reduced and production costs can be saved.

[0010] According to some embodiments of this application, the first welding contact surface is a plane, a sphere, or a combination of a plane and a sphere.

[0011] In the above technical solutions, by setting the first welding contact surface as a plane, the contact area between the first welding contact surface and the workpiece to be welded can be increased, thereby reducing the appearance defects of the weld points on the welding surface of the part in contact with the first welding contact surface; or, by setting the first welding contact surface as a spherical surface, the contact area between the first welding contact surface and the workpiece to be welded curved surface can be increased, which can adapt to the welding of curved workpieces; or, by setting the first welding contact surface as a combination of a plane and a sphere, it can be adapted to the welding of workpieces with low hardness. When welding workpieces with low hardness on the first welding contact surface, the sphere is more conducive to making full contact with workpieces that are prone to deformation.

[0012] According to some embodiments of this application, the second welding contact surface is a plane, a sphere, or a combination of a plane and a sphere.

[0013] In the above technical solutions, by setting the second welding contact surface as a plane, the contact area between the second welding contact surface and the workpiece to be welded can be increased, thereby reducing the appearance defects of the weld points on the welding surface of the part in contact with the second welding contact surface; or, by setting the second welding contact surface as a sphere, the contact area between the second welding contact surface and the workpiece to be welded curved surface can be increased, which can adapt to the welding of curved workpieces; or, by setting the second welding contact surface as a combination of a plane and a sphere, it can be adapted to the welding of workpieces with low hardness. When welding workpieces with low hardness on the second welding contact surface, the sphere is more conducive to making full contact with workpieces that are prone to deformation.

[0014] According to some embodiments of this application, the cable is detachably connected to the high-frequency inverter welding machine.

[0015] In the above technical solution, the cable can be detachably connected to the high-frequency inverter welding machine, which allows for the connection and separation of the cable and the high-frequency inverter welding machine, facilitating the maintenance, repair and replacement of the welding torch.

[0016] According to some embodiments of this application, the high-frequency inverter welding machine is provided with a cable socket, and one end of the cable is provided with a cable plug, which is inserted into the cable socket.

[0017] In the above technical solution, by providing a cable socket on the high-frequency inverter welding machine and a cable plug at one end of the cable, the stability of the connection between the cable and the high-frequency inverter welding machine is improved by inserting the cable plug into the cable socket.

[0018] According to some embodiments of this application, the welding equipment includes: a cooling unit, the cooling unit including a radiator and a water pump, the welding torch having a cooling channel, the radiator and the cooling channel being connected by a connecting pipe, and the water pump being used to drive cooling water to circulate between the cooling channel and the radiator.

[0019] In the above technical solution, by providing a cooling unit in the welding equipment, the electrode assembly of the welding torch can be cooled in conjunction with the cooling channel inside the welding torch; by providing a radiator in the cooling unit, the cooling water flowing out of the cooling channel inside the welding torch through the connecting pipe can be cooled, and then the cooling water can flow back into the cooling channel through the connecting pipe to cool the welding torch, thus preventing the welding contact surface of the welding torch from overheating and reducing the yield of the welded workpiece, and also increasing the safety of the welding equipment; by providing a water pump in the cooling unit, the cooling water circulating between the cooling channel and the radiator can be driven.

[0020] According to some embodiments of this application, the welding equipment includes a gradient pressure control mechanism, which includes a servo press-fitting mechanism and a pressure sensor. The servo press-fitting mechanism is connected to the electrode assembly, and the pressure sensor is used to detect the pressure applied to the electrode assembly by the servo press-fitting mechanism. The servo press-fitting mechanism is configured to apply gradient pressure to the electrode assembly.

[0021] In the above technical solution, by incorporating a servo press-fitting mechanism in the gradient pressure control mechanism, gradient pressure can be applied to the electrode assembly, which can make the solidification process of the molten pool on the workpiece surface more stable during welding and reduce the generation of indentations; by incorporating a pressure sensor in the gradient pressure control mechanism, the pressure applied to the electrode assembly by the servo press-fitting mechanism can be obtained, which is more conducive to controlling the magnitude of the pressure applied by the servo press-fitting mechanism.

[0022] According to some embodiments of this application, the servo press-fitting mechanism of the welding equipment is rigidly connected to the electrode assembly via a quick-change interface.

[0023] In the above technical solution, the servo press-fit mechanism and the electrode assembly are rigidly connected through a quick-change interface, which makes it easier to assemble and disassemble the servo press-fit mechanism and the electrode assembly. The rigid connection can also overcome the loosening caused by vibration during operation, thus improving the safety of the welding equipment.

[0024] According to some embodiments of this application, the welding equipment includes a control component and a temperature sensor. The control component is installed in the high-frequency inverter welding machine and includes an FPGA controller. The temperature sensor is used to collect the temperature of the molten pool. The control component is electrically connected to both the high-frequency inverter welding machine and the temperature sensor. The control component is used to control the current frequency of the high-frequency inverter welding machine according to the temperature of the molten pool.

[0025] In the above technical solution, a temperature sensor is set to collect the temperature of the molten pool and transmit the temperature information of the molten pool to the control component. By setting a control component including an FPGA controller, the frequency of the current released by the high-frequency inverter welding machine can be changed according to the molten pool temperature information fed back by the temperature sensor, thereby controlling the temperature of the molten pool to match the pressure applied by the electrode component gradient, making the solidification process of the molten pool on the workpiece surface more stable and reducing the generation of indentations.

[0026] According to some embodiments of this application, the welding equipment includes a vision positioning component, which includes an industrial camera and a laser positioning device, and the vision positioning component is used to compensate for the assembly gap of the workpiece through image recognition.

[0027] In the above technical solution, by equipping the welding equipment with a vision positioning component, the electrode assembly can be pre-positioned before the welding process; by equipping the vision positioning component with an industrial camera, images can be acquired by taking pictures, and positional errors such as gaps in the workpiece can be identified through the images, thereby reducing or eliminating gaps between workpiece assemblies by adjusting or adding materials, so as to maintain the normal operation of the welding equipment; by equipping the laser positioning device, the welding contact surface of the welding torch can be accurately made to contact and weld the part to be welded on the workpiece, which can improve the accuracy of the welding equipment in pre-welding positioning.

[0028] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0029] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a partial schematic diagram of a welding device provided in an embodiment of this application; Figure 2 This is a schematic diagram of a welding torch provided in one embodiment of this application; Figure 3 yes Figure 2 A schematic diagram of the middle electrode assembly.

[0030] Figure label: 100. Welding equipment; 10. High-frequency inverter welding machine; 11. Cooling unit; 12. Gradient pressure control mechanism; 13. Control components; 14. Vision positioning components; 20. Welding torch; 21. Electrode assembly; 22. First electrode cap; 221. First welding contact surface; 23. Second electrode cap; 231. Second welding contact surface; 30. Workpiece. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0032] The following is for reference. Figures 1-3 Describes a welding apparatus 100 according to an embodiment of this application.

[0033] According to a first aspect embodiment of this application, a welding apparatus 100 includes a high-frequency inverter welding machine 10 and a welding torch 20. The welding torch 20 is connected to the high-frequency inverter welding machine 10 via a cable. The welding torch 20 has an electrode assembly 21, which includes a first electrode cap 22 and a second electrode cap 23 that are disposed opposite to and spaced apart from each other. The first electrode cap 22 has a first welding contact surface 221 for contacting a workpiece 30, and the second electrode cap 23 has a second welding contact surface 231 for contacting a workpiece 30. The outer contour of the first welding contact surface 221 is a first outer contour, and the outer contour of the second welding contact surface 231 is a second outer contour. Both the first and second outer contours are circular.

[0034] The high-frequency inverter welding machine 10 is a welding device 100 based on high-frequency inverter technology, which performs welding by converting alternating current into high-frequency current. The welding torch 20 is connected to the high-frequency inverter welding machine 10 via a cable, allowing the high-frequency inverter welding machine 10 to supply power to the welding torch 20. For example, the high-frequency inverter welding machine 10 can release a 20kHz high-frequency inverter current through the welding torch 20. Through the synergistic effect of the skin effect and proximity effect of the high-frequency inverter current, a three-dimensional distributed thermal field can be constructed in the welding field, improving the energy efficiency ratio of the welding process, reducing heat input per unit area while achieving good welding performance, thus avoiding the problem of "deep indentation due to localized overheating," and improving the appearance and weld quality of the workpiece 30. The skin effect refers to the physical phenomenon that the current density is higher closer to the conductor surface during current flow; the proximity effect refers to the physical phenomenon that when high-frequency current flows in opposite directions between two conductors or in a reciprocating conductor, the current concentrates on the side adjacent to the conductor.

[0035] For example, the welding gun 20 of the welding equipment 100 can be an automatic high-frequency welding gun 20 or a manual high-frequency welding gun 20.

[0036] According to the welding equipment 100 of this application, by providing a high-frequency inverter welding machine 10, a high-frequency current can be released to the workpiece 30 to be welded by using a cable-connected motor module. Combined with the skin effect and proximity effect of the high-frequency current released by the high-frequency inverter welding machine 10, the current density on the surface of the welding contact surface is increased, which can shorten the welding time, reduce the degree of welding deformation on the surface of the workpiece 30, reduce the depth of welding indentation on the surface of the workpiece 30, improve the appearance quality of the weld joints of the workpiece 30, and improve the structural strength of the workpiece.

[0037] According to some embodiments of this application, the diameter of at least one of the first outer contour and the second outer contour is greater than or equal to 8 mm.

[0038] For example, the diameter of at least one of the first outer contour and the second outer contour is greater than or equal to 8 mm. This can be the diameter of the first outer contour being greater than or equal to 8 mm, the diameter of the second outer contour being greater than or equal to 8 mm, or the diameters of both the first and second outer contours being greater than or equal to 8 mm. The diameter of the first outer contour can be 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm, etc., and the diameter of the second outer contour can be 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm, etc.

[0039] The current diffusion characteristic refers to a diffusion phenomenon exhibited by current during propagation, mainly manifested in the variation of current density with spatial location. For example, on a welding contact surface with a diameter greater than or equal to 8 mm, a gradient distribution of current can be observed, with the current at the center of the welding contact surface greater than 80 A / mm² and at the edges less than 20 A / mm².

[0040] By utilizing the current dispersion characteristics, the current intensity at the center of at least one welding contact surface is higher than that at the edge of the welding contact surface, making the current more concentrated in the center of the welding contact surface. This can improve the energy efficiency ratio of the welding process, reduce the welding time required, thereby reducing the indentation on the surface of the workpiece 30, improving the appearance weld quality of the workpiece 30, and thus improving the structural strength of the workpiece 30. If the appearance weld quality of the workpiece 30 is poor, such as indentation leading to false welding or poor contact, the weld of the workpiece 30 will be prone to breakage when subjected to external force. Moreover, the high-frequency inverter welding machine 10 has strong process adaptability and can weld various plates, such as thin plates of 0.6mm-3mm, and can be applied to appearance welds of four doors and body water channels.

[0041] By making at least one of the first outer contour of the first electrode cap 22 and the second outer contour of the second electrode cap 23 have a diameter greater than or equal to 8 mm, it is advantageous to utilize the current dispersion characteristics to make the current at the center of the welding contact surface higher than the current at the edge of the welding contact surface.

[0042] According to some embodiments of this application, the diameter of the first outer contour ranges from φ8mm to φ10mm.

[0043] For example, the diameter of the first outer contour can be 8mm, 8.5mm, 9mm, 9.5mm, 10mm, etc. The diameter of the first outer contour can be referenced. Figure 3 A1 in the middle.

[0044] In the above technical solution, by making the diameter range of the first outer contour greater than 8mm, it is beneficial to further increase the current density on the surface of the first welding contact surface 221, which can shorten the welding time, reduce the degree of welding deformation on the surface of the workpiece 30, reduce the depth of welding indentation on the surface of the workpiece 30, improve the appearance weld quality of the workpiece 30, and improve production efficiency; by making the diameter range of the first outer contour less than 10mm, heat loss can be reduced and production costs can be saved.

[0045] According to some embodiments of this application, the diameter of the second outer contour ranges from φ8mm to φ10mm.

[0046] For example, the diameter of the second outer contour can be 8mm, 8.5mm, 9mm, 9.5mm, 10mm, etc. The diameter of the second outer contour can be referenced. Figure 3 A2 in the middle.

[0047] In the above technical solution, by making the diameter range of the second outer contour greater than 8mm, the current density on the surface of the second welding contact surface 231 is further increased, which can shorten the welding time, reduce the degree of welding deformation on the surface of the workpiece 30, reduce the depth of welding indentation on the surface of the workpiece 30, improve the appearance and weld quality of the workpiece 30, and improve production efficiency; by making the diameter range of the first outer contour less than 10mm, heat loss can be reduced and production costs can be saved.

[0048] According to some embodiments of this application, the first welding contact surface 221 is a plane, a sphere, or a combination of a plane and a sphere.

[0049] For example, the first welding contact surface 221 can be a plane, a sphere, or a combination of a plane and a sphere.

[0050] In the above technical solutions, by setting the first welding contact surface 221 as a plane, the contact area between the first welding contact surface 221 and the workpiece 30 to be welded can be increased, thereby reducing the appearance defects of the weld points on the welding surface of the part in contact with the first welding contact surface 221; or, by setting the first welding contact surface 221 as a spherical surface, it can be adapted to the welding of curved workpieces 30, increasing the contact area between the first welding contact surface 221 and the curved surface of the workpiece 30 to be welded; or, by setting the first welding contact surface 221 as a combination of a plane and a sphere, it can be adapted to the welding of workpieces 30 with lower hardness. When welding workpieces 30 with lower hardness on the first welding contact surface 221, the sphere is more conducive to making full contact with the workpiece 30 that is prone to deformation.

[0051] According to some embodiments of this application, the second welding contact surface 231 is a plane, a sphere, or a combination of a plane and a sphere.

[0052] For example, the second welding contact surface 231 can be a plane, a sphere, or a combination of a plane and a sphere.

[0053] In the above technical solutions, by setting the second welding contact surface 231 as a plane, the contact area between the second welding contact surface 231 and the surface to be welded of the workpiece 30 can be increased, thereby reducing the appearance defects of the weld points on the welding surface of the part in contact with the second welding contact surface 231; or, by setting the second welding contact surface 231 as a spherical surface, it can be adapted to the welding of curved workpieces 30, increasing the contact area between the second welding contact surface 231 and the curved surface to be welded of the workpiece 30; or, by setting the second welding contact surface 231 as a combination of a plane and a sphere, it can be adapted to the welding of workpieces 30 with lower hardness. When welding workpieces 30 with lower hardness on the second welding contact surface 231, the sphere is more conducive to making full contact with the workpiece 30 that is prone to deformation.

[0054] According to some embodiments of this application, the cable is detachably connected to the high-frequency inverter welding machine 10. For example, the cable can be detachably connected to the high-frequency inverter welding machine 10 via a plug or a terminal block.

[0055] In the above technical solution, the cable can be detachably connected to the high-frequency inverter welding machine 10, which allows for the connection and separation of the cable and the high-frequency inverter welding machine 10, facilitating the maintenance, repair and replacement of the welding torch 20.

[0056] According to some embodiments of this application, the high-frequency inverter welding machine 10 is provided with a cable socket, and one end of the cable is provided with a cable plug, which is inserted into the cable socket. Inserting the cable plug into the cable socket allows the high-frequency inverter welding machine 10 to supply power to the welding torch 20 via the cable.

[0057] In the above technical solution, by providing a cable socket on the high-frequency inverter welding machine 10 and a cable plug at one end of the cable, the stability of the connection between the cable and the high-frequency inverter welding machine 10 is improved by inserting the cable plug into the cable socket.

[0058] According to some embodiments of this application, the welding equipment 100 includes: a cooling unit 11, the cooling unit 11 includes a radiator and a water pump, the welding torch 20 is provided with a cooling channel, the radiator and the cooling channel are connected by a connecting pipe, and the water pump is used to drive the cooling water to circulate between the cooling channel and the radiator.

[0059] For example, the cooling unit 11 can be an air-cooled machine or a water-cooled machine, or other refrigeration equipment.

[0060] For example, the welding torch 20 is provided with a cooling channel that can be connected to the inside of the electrode cap to cool the electrode cap. The cooling channel can also have a back-and-forth passage within the welding torch 20 to achieve the purpose of circulation.

[0061] In the above technical solution, by providing a cooling unit 11 in the welding equipment 100, the electrode assembly 21 of the welding torch 20 can be cooled in conjunction with the cooling channel inside the welding torch 20; by providing a radiator in the cooling unit 11, the cooling water flowing out from the cooling channel inside the welding torch 20 through the connecting pipe can be cooled, and then the cooling water can flow through the connecting pipe back into the cooling channel to cool the welding torch 20, thus preventing the welding contact surface of the welding torch 20 from overheating and reducing the yield of the welded workpiece 30, and also increasing the safety of the welding equipment 100; by providing a water pump in the cooling unit 11, the cooling water circulating between the cooling channel and the radiator can be driven.

[0062] According to some embodiments of this application, welding equipment 100 includes a gradient pressure control mechanism 12, which includes a servo press mechanism and a pressure sensor. The servo press mechanism is connected to an electrode assembly 21, and the pressure sensor is used to detect the pressure applied to the electrode assembly 21 by the servo press mechanism. The servo press mechanism is configured to apply gradient pressure to the electrode assembly 21.

[0063] For example, the servo press mechanism can be driven by a servo motor, which can achieve precise adjustment of parameters such as pressure, displacement and speed, thereby applying gradient pressure to the electrode assembly 21.

[0064] For example, under the drive of the servo motor, the welding contact surface of the welding torch 20 can apply pressure to the workpiece 30 in three stages: pre-pressure (400N / 50ms) → molten pressure (1000N / 30ms) → holding pressure (600N / 100ms). By gradually applying pressure to the workpiece 30 from the pre-pressure stage to the molten pressure stage, the molten pool on the surface of the workpiece 30 can be gradually and stably melted. By gradually reducing the pressure on the workpiece 30 from the molten pressure stage to the holding pressure stage, the molten pool on the surface of the workpiece 30 can be gradually and stably solidified.

[0065] In the above technical solution, by providing a servo pressing mechanism in the gradient pressure control mechanism 12, pressure can be applied to the electrode assembly 21 in a gradient manner, which can make the solidification process of the molten pool on the surface of the workpiece 30 more stable during the welding process and reduce the generation of indentations; by providing a pressure sensor in the gradient pressure control mechanism 12, the pressure applied to the electrode assembly 21 by the servo pressing mechanism can be obtained, which is more conducive to controlling the magnitude of the pressure applied by the servo pressing mechanism.

[0066] According to some embodiments of this application, the servo press-fitting mechanism of the welding equipment 100 is rigidly connected to the electrode assembly 21 via a quick-change interface.

[0067] In the above technical solution, the servo pressing mechanism and the electrode assembly 21 are rigidly connected through a quick-change interface, which makes it easier to assemble and disassemble the servo pressing mechanism and the electrode assembly 21. The rigid connection can also overcome the loosening caused by vibration during operation, thus improving the safety of the welding equipment 100.

[0068] According to some embodiments of this application, the welding equipment 100 includes a control component 13 and a temperature sensor. The control component 13 is installed on the high-frequency inverter welding machine 10 and includes an FPGA (Field Programmable Gate Array) controller. The temperature sensor is used to collect the temperature of the molten pool. The control component 13 is electrically connected to both the high-frequency inverter welding machine 10 and the temperature sensor. The control component 13 is used to control the current frequency of the high-frequency inverter welding machine 10 according to the temperature of the molten pool.

[0069] For example, temperature sensors can be thermocouples, resistance temperature detectors (RTDs), semiconductor sensors, etc.

[0070] The control component 13 is electrically connected to the high-frequency inverter welding machine 10 and the temperature sensor. Specifically, the control component 13 is electrically connected to the high-frequency inverter welding machine 10 and the temperature sensor is electrically connected.

[0071] The control component 13 of the FPGA controller can receive the molten pool temperature feedback from the temperature sensor and can issue commands to control the frequency of the current released by the high-frequency inverter welder 10. For example, when the temperature of the molten pool is detected to be too low, the FPGA controller controls the frequency of the current released by the high-frequency inverter welder 10 to increase; when the temperature of the molten pool is detected to be too high, the FPGA controller controls the frequency of the current released by the high-frequency inverter welder 10 to decrease.

[0072] In the above technical solution, a temperature sensor is set to collect the temperature of the molten pool and transmit the temperature information of the molten pool to the control component 13. By setting the control component 13, which includes an FPGA controller, the frequency of the current released by the high-frequency inverter welding machine 10 can be changed according to the molten pool temperature information fed back by the temperature sensor, thereby controlling the temperature of the molten pool to match the pressure applied by the gradient of the electrode component 21, making the solidification process of the molten pool on the surface of the workpiece 30 more stable and reducing the generation of indentations.

[0073] According to some embodiments of this application, welding equipment 100 includes a vision positioning component 14, which includes an industrial camera and a laser positioning device. The vision positioning component 14 is used to compensate for the assembly gap of workpiece 30 through image recognition.

[0074] The industrial camera can capture images of the workpiece 30, and the vision positioning component 14 can use the images captured by the industrial camera to identify and compensate for the assembly gap of the workpiece 30.

[0075] In the above technical solution, by providing a vision positioning component 14 in the welding equipment 100, the electrode assembly 21 can be pre-positioned before welding the workpiece 30; by providing an industrial camera in the vision positioning component 14, images can be acquired by taking pictures, and positional errors such as gaps in the workpiece 30 can be identified through the images, thereby reducing or eliminating gaps between the workpieces 30 by adjusting or adding materials, so as to maintain the normal operation of the welding equipment 100; by providing a laser positioning device, the welding contact surface of the welding torch 20 can be accurately made to contact and weld the part of the workpiece 30 to be welded, which can improve the accuracy of the welding equipment 100 in positioning before welding.

[0076] The following reference Figures 1-3 This application describes a welding apparatus 100 according to some embodiments.

[0077] In this embodiment, the welding equipment 100 includes a high-frequency inverter welding machine 10, a cooling unit 11, a gradient pressure control mechanism 12, a temperature sensor, a vision positioning component 14, and a welding torch 20. The high-frequency inverter welding machine 10 includes a control component 13, which includes an FPGA sensor, and the vision positioning component 14 includes an industrial camera and a laser positioning device.

[0078] The welding torch 20 is connected to the high-frequency inverter welding machine 10 via a cable. The high-frequency inverter welding machine 10 is equipped with a cable socket, and one end of the cable is equipped with a cable plug, which is inserted into the cable socket. The welding torch 20 has an electrode assembly 21, which includes a first electrode cap 22 and a second electrode cap 23 that are arranged opposite to each other and spaced apart. The first electrode cap 22 has a first welding contact surface 221 for contacting the workpiece 30, and the second electrode cap 23 has a second welding contact surface 231 for contacting the workpiece 30. The outer contour of the first welding contact surface 221 is a first outer contour, and the outer contour of the second welding contact surface 231 is a second outer contour. Both the first and second outer contours are circular and both are planar.

[0079] When the welding equipment 100 starts working, the workpiece 30 to be welded is first positioned. The vision positioning component 14 scans the position of the workpiece 30 and aligns the first electrode cap 22 and the second electrode cap 23 of the welding torch 20 with the surface of the workpiece 30. Then, the high-frequency inverter welding machine 10 excites a high-frequency current, and the gradient pressure system drives the first welding contact surface 221 and the second welding contact surface 231 to apply pressure to the surface of the workpiece 30. In the pre-pressure stage, the first welding contact surface 221 and the second welding contact surface 231 of the welding torch 20 apply pressure to the workpiece 30 at a frequency of 400N / 50ms. The welding torch 20 outputs a high-frequency current to form a distributed thermal field, followed by a melting and pressurizing stage. The first welding contact surface 221 and the second welding contact surface 231 of the welding torch 20 apply pressure to the workpiece 30 at a frequency of 1000 N / 30 ms. The surfaces of the workpiece 30 are in a molten state and connected relative to each other. Finally, in the pressure holding and cooling stage, the first welding contact surface 221 and the second welding contact surface 231 of the welding torch 20 apply pressure to the workpiece 30 at a frequency of 600 N / 100 ms. As the pressure decreases, the molten pool on the surface of the workpiece 30 gradually solidifies, and the welding of the workpiece 30 is completed. The liquid cooling system is activated to cool the electrode cap of the welding torch 20. The welded workpiece 30 undergoes quality inspection through a quality detection system. A laser profilometer scans the weld points and generates a 3D morphology image to evaluate the welding quality of the workpiece 30.

[0080] In this application, "multiple" refers to two or more.

[0081] In this application, unless otherwise expressly defined, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0082] The terms “first,” “second,” “third,” “fourth,” etc., in this application (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0083] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0084] Unless otherwise specified, all steps in this application may be performed sequentially or randomly. For example, if the method includes steps A and B, it means that the method may include steps A and B performed sequentially, or it may include steps B and A performed sequentially. For example, if the method may also include step C, it means that step C may be added to the method in any order. For example, the method may include steps A, B, and C, or it may include steps A, C, and B, or it may include steps C, A, and B, etc.

[0085] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A welding device, characterized in that, include: High-frequency inverter welding machine; The welding torch is connected to the high-frequency inverter welding machine via a cable. The welding torch has an electrode assembly, which includes a first electrode cap and a second electrode cap that are arranged opposite to and spaced apart from each other. The first electrode cap has a first welding contact surface for contacting the workpiece, and the second electrode cap has a second welding contact surface for contacting the workpiece. The outer contour of the first welding contact surface is a first outer contour, and the outer contour of the second welding contact surface is a second outer contour. Both the first outer contour and the second outer contour are circular.

2. The welding equipment according to claim 1, characterized in that, The diameter of the first outer contour ranges from φ8mm to φ10mm; and / or, the diameter of the second outer contour ranges from φ8mm to φ10mm.

3. The welding equipment according to claim 1, characterized in that, The first welding contact surface is a plane, a sphere, or a combination of a plane and a sphere; and / or, the second welding contact surface is a plane, a sphere, or a combination of a plane and a sphere.

4. The welding equipment according to claim 1, characterized in that, The cable is detachably connected to the high-frequency inverter welding machine.

5. The welding equipment according to claim 4, characterized in that, The high-frequency inverter welding machine is equipped with a cable socket, and one end of the cable is equipped with a cable plug, which is inserted into the cable socket.

6. The welding equipment according to claim 1, characterized in that, include: The cooling unit includes a radiator and a water pump. The welding torch has a cooling channel. The radiator and the cooling channel are connected by a connecting pipe. The water pump is used to drive cooling water to circulate between the cooling channel and the radiator.

7. The welding equipment according to any one of claims 1-6, characterized in that, The device includes a gradient pressure control mechanism, which comprises a servo press-fit mechanism and a pressure sensor. The servo press-fit mechanism is connected to the electrode assembly, and the pressure sensor is used to detect the pressure applied to the electrode assembly by the servo press-fit mechanism. The servo press-fit mechanism is configured to apply gradient pressure to the electrode assembly.

8. The welding equipment according to claim 7, characterized in that, The servo press-fitting mechanism is rigidly connected to the electrode assembly via a quick-change interface.

9. The welding equipment according to claim 1, characterized in that, The device includes a control component and a temperature sensor. The control component is installed in the high-frequency inverter welding machine and includes an FPGA controller. The temperature sensor is used to collect the temperature of the molten pool. The control component is electrically connected to both the high-frequency inverter welding machine and the temperature sensor. The control component is used to control the current frequency of the high-frequency inverter welding machine according to the temperature of the molten pool.

10. The welding equipment according to claim 1, characterized in that, It includes a vision positioning component, which includes an industrial camera and a laser positioning device, and is used to compensate for assembly gaps of workpieces through image recognition.

Images