Automatic TIG (Tungsten Inert Gas) welding system suitable for flexible production of multiple vehicle types and use method

Abstract

The invention belongs to the technical field of automobile welding, and discloses an automatic TIG welding system suitable for flexible production of multiple vehicle types and a using method.The automatic TIG welding system comprises three plate containing mechanisms which are arranged at intervals, a pneumoelectric quick plug mechanism is arranged on one sides of the three plate containing mechanisms, and a control cabinet is arranged beside one plate containing mechanism; the three plate placing mechanisms and the pneumoelectric quick plug mechanism are electrically connected with the control cabinet. The automobile body welding device is simple in overall structure, automatic switching and flexible production of multiple automobile types can be achieved in the automobile body welding process, the welding work efficiency is improved, and the using effect is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of automobile welding, and in particular, relates to an automatic TIG welding system suitable for flexible production of multiple vehicle models and a use method thereof. Background Art

[0002] As the automotive market becomes increasingly diversified and personalized, automakers are faced with the huge challenge of producing multiple models on the same line. Traditional welding production lines are often designed for a single or limited number of models, making it difficult to adapt to rapidly changing market demands.

[0003] TIG welding technology, the full name of which is Tungsten Inert Gas Welding, also known as Argon Arc Welding, is a high-quality welding method that uses an infusible tungsten electrode to generate an arc under the protection of an inert gas (usually argon) to heat and melt the workpiece, thereby achieving welding. TIG welding technology is widely used in the connection of various metal materials, especially the welding of stainless steel, aluminum alloy, nickel alloy, copper alloy, titanium alloy and other materials.

[0004] TIG welding technology has been widely used in the automotive manufacturing field due to its high quality, high precision and welding characteristics suitable for a variety of materials. However, in the context of multi-model co-production, traditional TIG welding systems face many limitations. For example, the welding positions and process parameters of different models vary greatly, resulting in frequent replacement of welding fixtures and equipment and low production efficiency. In addition, due to the variety of models, the degree of automation in the welding process is also limited, making it difficult to achieve efficient and stable production. Summary of the invention

[0005] The main technical problem to be solved by the present invention is to provide an automatic TIG welding system and a method of use suitable for flexible production of multiple models, which can realize automatic switching of multiple models and flexible production during the automobile body welding process, improve welding work efficiency, and accurately monitor welding data at the same time, facilitate real-time tracking, control welding quality, and ensure that workers stay away from the working area of ​​the welding machine to reduce the harm of smoke to the body.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: An automatic TIG welding system suitable for flexible production of multiple vehicle models, comprising three plate placement mechanisms placed at intervals, a gas-electric quick-plug mechanism placed on one side of the three plate placement mechanisms, a control cabinet placed next to one of the plate placement mechanisms, the three plate placement mechanisms and the gas-electric quick-plug mechanism are all electrically connected to the control cabinet, and a handling robot is also placed on the side of the three plate placement mechanisms away from the gas-electric quick-plug mechanism; The plate placement mechanism includes a plurality of legs arranged evenly and at intervals, the upper ends of the plurality of legs are fixedly mounted with a same stand, two sets of mutually perpendicular clamping assemblies are vertically arranged at the four corners of the stand, a TIG welding gun assembly is vertically arranged at the middle of the stand, a plurality of support assemblies are also fixedly mounted near the TIG welding gun assembly on the stand, and a plurality of first solenoid valves are fixedly mounted at one side of the stand; The gas-electric quick-insert mechanism comprises a bracket, three groups of gas-electric communication components are evenly spaced on the surface of the bracket, a mounting plate is fixedly installed at the middle position inside the bracket, welding machines are fixedly installed at positions on the mounting plate corresponding to the three groups of gas-electric communication components, and the input end of the welding machine is connected to a Hall sensor; A plurality of second solenoid valves are fixedly installed at one side of the bracket.

[0007] The following is a further optimization of the above technical solution by the present invention: The TIG welding gun assembly comprises a third mounting seat fixedly mounted on the stand, and a third connecting plate is fixedly mounted on one side of the third mounting seat near the upper end.

[0008] Further optimization: three welding gun brackets are fixedly connected to the third connecting plate, and the ends of the three welding gun brackets away from the third mounting seat are respectively fixedly installed with a first welding gun, a second welding gun, and a third welding gun; The three groups of gas-electricity connection components are respectively connected to the first welding gun, the second welding gun and the third welding gun.

[0009] Further optimization: the gas-electric connection component includes a cylinder mounting seat fixedly mounted on the upper end surface of the bracket, a telescopic cylinder is fixedly mounted on the cylinder mounting seat, and a fixing plate is fixedly mounted on the power output end of the telescopic cylinder.

[0010] Further optimization: first insulating pads are fixedly installed at both sides of the end surface of the fixed plate away from the telescopic cylinder, and a plurality of first welding columns arranged at intervals are fixedly installed on one end surface of the first insulating pad away from the fixed plate.

[0011] Further optimization: A first connecting block is fixedly installed on the end surface of the fixed plate away from the telescopic cylinder and located between the two first insulating pads, and a plurality of gas quick plugs are fixedly installed on the first connecting block.

[0012] Further optimization: a fixing seat is fixedly installed on the upper end surface of the bracket near the cylinder mounting seat, and second insulating pads are fixedly installed on both sides of the end surface of the fixing seat near the cylinder mounting seat, and the second insulating pad corresponds to the position of the first insulating pad.

[0013] Further optimization: A second welding column is fixedly installed on the end surface of the second insulating spacer close to the cylinder mounting seat, and the second welding column corresponds to the first welding column.

[0014] Further optimization: a second connecting block is fixedly installed on the end surface of the fixing seat close to the cylinder mounting seat at a position corresponding to the first connecting block, and a plurality of gas quick sockets are fixedly installed on the end surface of the second connecting block close to the first connecting block, and the gas quick sockets correspond to the gas quick plugs.

[0015] The present invention also provides a method for using an automatic TIG welding system suitable for flexible production of multiple vehicle models, based on the above-mentioned automatic TIG welding system suitable for flexible production of multiple vehicle models, comprising the following steps: S1. Input various models of the body panels to be welded and the welding point position parameters into the control cabinet; S2, placing the body panels to be welded in a specified area, starting the power supply, and the handling robot first identifies the body panels. After identifying the model of the body panels, the handling robot places the body panels on the panel placement mechanism of the corresponding workstation; S3, when the clamping assembly in the panel placement mechanism for placing the body panel recognizes that the body panel is in place, the model is first identified and confirmed, and then the confirmation and in-place signals are fed back to the control cabinet; S4, the control cabinet controls the first solenoid valve, which in turn drives the corresponding clamping assembly to press the vehicle body panel, and the control cabinet controls the second solenoid valve, which in turn drives the power output end of the corresponding telescopic cylinder to extend, driving the first welding column to connect with the second welding column, and the air quick plug to connect with the corresponding air quick socket; S5, the control cabinet starts three welding machines that control the first welding gun, the second welding gun and the third welding gun respectively according to the model of the body panel and the welding point position parameters, so that the first welding gun, the second welding gun and the third welding gun complete the welding work in sequence, and then complete the welding of the body panel; S6. When the Hall sensor detects an abnormal signal during welding, the Hall sensor feeds back the abnormal signal to the control cabinet, and the control cabinet performs alarm processing; S7. After welding is completed, the control cabinet controls to start the first solenoid valve, which then releases the clamping action of the clamping assembly. The control cabinet controls to start the second solenoid valve, which then disengages the pneumatic and electric quick-connect mechanism. The control cabinet controls the handling robot to remove the body panel and place it in the specified area, and this process is repeated.

[0016] The present invention adopts the above technical solution and has the following beneficial effects: 1. The present invention adopts the above technical solution, which is ingenious in conception and reasonable in structure, and can automatically weld different types of body panels, that is, the system can automatically identify the body panel model and automatically switch the welding gun to weld the welding points of the body panel, realizing automatic flexible switching of multiple models. The whole process is completed automatically without manual intervention, thereby improving work efficiency and work quality, and the welding process realizes accurate monitoring of data, which is convenient for real-time tracking; 2. The system is equipped with a gas-electric quick-plug mechanism, that is, when the welding gun is controlled to work, the telescopic cylinder is used to control the docking or separation of the first welding column and the second welding column, and the gas quick plug and the gas quick socket are controlled to dock or separate, so as to quickly realize the corresponding welding gun to work or stop working, that is, to provide protective gas and electricity for the welding gun on the work station, adopt physical drive, reduce the maintenance rate, ensure the continuous and stable welding process, and save energy at the same time.

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure in an embodiment of the present invention; Figure 2 It is a structural schematic diagram of a plate placement mechanism in an embodiment of the present invention; Figure 3 It is a structural schematic diagram of the gas-electric quick-insertion mechanism in an embodiment of the present invention; Figure 4 It is a structural schematic diagram of a clamping assembly in an embodiment of the present invention; Figure 5 It is a structural schematic diagram of a support assembly in an embodiment of the present invention; Figure 6 A schematic diagram of the structure of a welding gun assembly in an embodiment of the present invention; Figure 7 It is a schematic diagram of the structure of the gas-electricity connection component in an embodiment of the present invention; Figure 8 It is an application style diagram of the overall structure in an embodiment of the present invention; Fig. 9 It is an operation flow chart of the overall structure in an embodiment of the present invention.

[0019] In the figure: 1, plate placement mechanism; 11, support leg; 12, stand; 13, clamping assembly; 130, clamping cylinder; 131, pressing arm; 132, first mounting seat; 133, upper pressing head; 134, first connecting plate; 135, lower pressing head; 136, switch bracket; 137, proximity switch; 14, support assembly; 140, second mounting seat; 141, second connecting plate; 142, support part; 15, first solenoid valve; 16, TIG welding gun assembly; 160, third mounting seat; 161, third connecting plate; 162, welding gun bracket; 163, first welding gun; 1630, first Second welding gun; 1631, third welding gun; 2, gas-electric quick-plug mechanism; 21, bracket; 22, gas-electric connection component; 220, cylinder mounting seat; 2201, fixing plate; 221, telescopic cylinder; 222, first connecting block; 223, gas quick plug; 224, first insulating pad; 225, first welding column; 226, fixing seat; 227, second connecting block; 228, gas quick socket; 229, second insulating pad; 2290, second welding column; 23, welding machine; 230, Hall sensor; 24, second solenoid valve; 25, mounting plate; 3, control cabinet; 33, cabinet; 4, body panel. DETAILED DESCRIPTION

[0020] like Figure 1-9 As shown: An automatic TIG welding system suitable for flexible production of multiple vehicle models and a method of use, comprising three plate placement mechanisms 1 placed at intervals, a gas-electric quick-plug mechanism 2 placed on one side of the three plate placement mechanisms 1, a control cabinet 3 placed next to one of the plate placement mechanisms 1, the three plate placement mechanisms 1 and the gas-electric quick-plug mechanism 2 are all electrically connected to the control cabinet 3, and a handling robot is also placed on the side of the three plate placement mechanisms 1 away from the gas-electric quick-plug mechanism 2; The plate placement mechanism 1 comprises a plurality of legs 11 arranged evenly and at intervals, a same stand 12 is fixedly mounted on the upper ends of the plurality of legs 11, two sets of mutually perpendicular clamping assemblies 13 are vertically arranged at the four corners of the stand 12, a TIG welding gun assembly 16 is vertically arranged at the middle of the stand 12, a plurality of support assemblies 14 are also fixedly mounted on the stand 12 near the TIG welding gun assembly 16, and a plurality of first solenoid valves 15 are fixedly mounted at one side of the stand 12; The gas-electric quick-insertion mechanism 2 includes a bracket 21, and three groups of gas-electric communication components 22 are evenly spaced on the surface of the bracket 21. A mounting plate 25 is fixedly installed at the middle position inside the bracket 21, and welders 23 are fixedly installed at positions on the mounting plate 25 corresponding to the three groups of gas-electric communication components 22. The input end of the welder 23 is connected to a Hall sensor 230; A plurality of second solenoid valves 24 are fixedly mounted on one side of the bracket 21 .

[0021] In this embodiment, the supporting legs 11 are made by welding angle steel and steel plates, and the steel plates are fixed on the ground by bolts. This design makes the supporting legs 11 stable.

[0022] The stand 12 is made by welding a plurality of square tubes of different lengths and is fixedly mounted on the legs 11 by welding.

[0023] like Figure 4 As shown, the clamping assembly 13 includes a first mounting seat 132 fixedly mounted on the stand 12, and a first connecting plate 134 is fixedly mounted on one side surface of the first mounting seat 132 by bolts.

[0024] A pressing cylinder 130 is fixedly mounted on one side of the first connecting plate 134 , and a pressing arm 131 is rotatably connected to a power output end of the pressing cylinder 130 .

[0025] The pressing arm 131 is rotatably connected to a corresponding position of the first connecting plate 134 via a hinge shaft.

[0026] An upper pressing head 133 is fixedly mounted at the end of the pressing arm 131 away from the pressing cylinder 130 .

[0027] A lower pressing head 135 is fixedly mounted on the upper end of the first connecting plate 134 at a position corresponding to the upper pressing head 133 .

[0028] The end faces of the upper pressing head 133 and the lower pressing head 135 match each other, and the body panel 4 is located between the upper pressing head 133 and the lower pressing head 135, that is, the end faces of the upper pressing head 133 and the lower pressing head 135 match each other with the two surfaces at the position where the body panel 4 is pressed.

[0029] Such a design protects the vehicle body panel 4 while compressing the vehicle body panel 4 .

[0030] A switch bracket 136 is fixedly mounted on an end surface of the first connecting plate 134 away from the first mounting seat 132 , and a proximity switch 137 is adjustably mounted on the switch bracket 136 .

[0031] The proximity switch 137 can detect whether the position of the body panel 4 to be welded is in place and the type of the body panel. The specific detection principle is well known in the prior art and will not be repeated here.

[0032] The proximity switch 137 is commercially available.

[0033] The function of the clamping assembly 13 is to clamp and position the body panel 4 to be welded that is placed in place. When in use, the power output end of the clamping cylinder 130 is in a retracted state, driving the pressing arm 131 and the upper pressing head 133 to rotate away from the lower pressing head 135 and to be in an open state, placing the body panel 4 on the lower pressing head 135 of all the clamping assemblies 13. After the proximity switch 137 detects that it is in place, the power output end of the clamping cylinder 130 is controlled to extend, driving the pressing arm 131 and the upper pressing head 133 to rotate toward a position close to the lower pressing head 135 until the body is clamped and fixed.

[0034] like Figure 6 As shown, the support assembly 14 includes a second mounting base 140 fixedly mounted at a corresponding position on the stand 12 .

[0035] A second connecting plate 141 is fixedly mounted on a side surface of the second mounting seat 140 near an upper end thereof, and at least one supporting portion 142 is fixedly mounted on the second connecting plate 141 .

[0036] The end face shape of the support portion 142 away from the second mounting seat 140 matches the surface of the body panel 4. With this design, when the body panel 4 to be welded is placed on the panel placement mechanism 1, the support portion 142 in the support assembly 14 supports the body panel 4, which can assist the clamping assembly 13 in clamping the body panel 4 and prevent the body panel 4 from being pinched or damaged.

[0037] like Figure 5 As shown, the TIG welding gun assembly 16 includes a third mounting seat 160 fixedly mounted on the stand 12 , and a third connecting plate 161 is fixedly mounted on one side of the third mounting seat 160 near the upper end.

[0038] Three welding gun brackets 162 are fixedly connected to the third connecting plate 161 .

[0039] A first welding gun 163 , a second welding gun 1630 , and a third welding gun 1631 are fixedly mounted on the ends of the three welding gun brackets 162 away from the third mounting seat 160 , respectively.

[0040] With such a design, in this embodiment, the number of the first welding guns 163 is set to three, the number of the second welding guns 1630 is set to three, and the number of the third welding guns 1631 is set to three.

[0041] The first welding gun 163 , the second welding gun 1630 , and the third welding gun 1631 can all be commercially available.

[0042] like Figure 7 As shown, the gas-electric communication assembly 22 includes a cylinder mounting seat 220 fixedly mounted on the upper end surface of the bracket 21 .

[0043] A telescopic cylinder 221 is fixedly mounted on the cylinder mounting seat 220 .

[0044] A fixing plate 2201 is fixedly mounted on the power output end of the telescopic cylinder 221 .

[0045] First insulating pads 224 are fixedly mounted at both sides of the end surface of the fixing plate 2201 away from the telescopic cylinder 221 .

[0046] A plurality of first welding columns 225 arranged at intervals are fixedly mounted on an end surface of the first insulating spacer 224 away from the fixing plate 2201 .

[0047] In this design, the number of the first welding columns 225 is set to four, wherein one end of three first welding columns 225 are respectively connected to the output ends of the three welding machines 23, and the remaining first welding column 225 is used as a spare.

[0048] In this embodiment, the connection method between the first welding column 225 and the welding machine 23 is well known in the prior art and will not be described in detail here.

[0049] A first connecting block 222 is fixedly mounted on the end surface of the fixing plate 2201 away from the telescopic cylinder 221 and located between two first insulating spacers 224 .

[0050] A plurality of gas quick plugs 223 are fixedly mounted on the first connection block 222 . In this embodiment, the number of the gas quick plugs 223 in a set of gas-electric communication components 22 is set to three.

[0051] One end of the three gas quick plugs 223 is connected to an external argon gas source through gas pipes.

[0052] A fixing seat 226 is fixedly mounted on the upper end surface of the bracket 21 near the cylinder mounting seat 220 .

[0053] Second insulating pads 229 are fixedly mounted at both sides of the end surface of the fixing seat 226 close to the cylinder mounting seat 220 and at positions corresponding to the first insulating pads 224 respectively.

[0054] Second welding columns 2290 are fixedly mounted on the end surfaces of the second insulating spacers 229 close to the cylinder mounting seat 220 , and positions of the second welding columns 2290 correspond to the first welding columns 225 .

[0055] In this design, the gas-electric communication components 22 are arranged in three groups, and the number of the second welding columns 2290 in each group of gas-electric communication components 22 is set to four.

[0056] The three second welding columns 2290 in one group of gas-electric communication components 22 are respectively connected to the three first welding guns 163, the three second welding columns 2290 in one group of gas-electric communication components 22 are respectively connected to the three second welding guns 1630, and the three second welding columns 2290 in the remaining group of gas-electric communication components 22 are respectively connected to the three third welding guns 1631.

[0057] In this embodiment, the connection methods of the second welding column 2290 to the first welding gun 163, the second welding gun 1630, and the third welding gun 1631 are well known and will not be described in detail herein.

[0058] The remaining second solder column 2290 corresponds to the position of the spare first solder column 225 , and this second solder column 2290 is also used as a spare.

[0059] A second connection block 227 is fixedly mounted on the end surface of the fixing seat 226 close to the cylinder mounting seat 220 at a position corresponding to the first connection block 222 .

[0060] A plurality of gas quick sockets 228 are fixedly mounted on the end surface of the second connection block 227 close to the first connection block 222 .

[0061] In this embodiment, the number of the gas quick sockets 228 in a set of gas-electric communication components 22 is set to three, and the three gas quick sockets 228 correspond to the three gas quick plugs 223 respectively.

[0062] The output ends of the three gas quick plugs 223 in one group of gas-electric communication components 22 are connected to the three first welding guns 163 through gas pipes respectively; the output ends of the three gas quick plugs 223 in one group of gas-electric communication components 22 are connected to the three second welding guns 1630 through gas pipes respectively; the output ends of the three gas quick plugs 223 in the remaining group of gas-electric communication components 22 are connected to the three third welding guns 1631 through gas pipes respectively.

[0063] like Figure 8 As shown, three workstations are set in this embodiment, each workstation includes a panel placement mechanism 1 on which a body panel 4 is placed, and each body panel 4 corresponds to a first welding gun 163, a second welding gun 1630, and a third welding gun 1631, that is, the first welding gun 163, the second welding gun 1630, and the third welding gun 1631 of one workstation are controlled by three welding machines 23 respectively.

[0064] With such a design, when in use, the telescopic cylinder 221 is started, the power output end of the telescopic cylinder 221 extends, driving the fixed plate 2201 to extend, the first insulating pad 224 and the first connecting block 222 on the fixed plate 2201 to extend, driving the first welding column 225 and the gas quick plug 223 to extend, so that the first welding column 225 is docked with the corresponding second welding column 2290, thereby realizing the docking of the gas quick plug 223 with the corresponding gas quick socket 228.

[0065] When the three first welding columns 225 are respectively connected with the corresponding second welding columns 2290, the corresponding welding machine 23 is controlled to start according to the model and welding point information of the body panel 4, thereby controlling the start of the corresponding first welding gun 163, the second welding gun 1630 or the third welding gun 1631 for welding.

[0066] In this embodiment, the quick connection and disconnection method of the gas quick plug 223 and the gas quick socket 228 is well known in the prior art and will not be described here in detail. The gas quick plug 223 and the gas quick socket 228 can both be obtained commercially.

[0067] The control cabinet 3 includes a cabinet body 33 , in which a PLC master control system and a signal interaction system are arranged. The signal interaction system is electrically connected to the PLC master control system through wires.

[0068] The signal interaction system includes a first relay module, a CClink input and output module and a second relay module; The signal interaction system also includes other common electrical components such as wiring terminals and power supplies. In the prior art, the types and functions of the electrical components used are well known and will not be described in detail here.

[0069] The CCLink input and output module is responsible for data input and output. The CCLink input and output module is a key component for an automation control system. It supports the CC-Link communication protocol and can achieve high-speed and efficient data transmission between devices. CCLink is developed by Mitsubishi Electric and is used to connect industrial automation equipment (programmable logic controllers, sensors, actuators, etc.). It is responsible for data input and output and realizes information interaction between devices. The specific transmission principle is well known in the prior art and will not be described in detail here. It can be obtained commercially.

[0070] The first relay module and the second relay module are both common electrical components and can be obtained commercially.

[0071] The signal output end of the proximity switch 137 and the signal output of the Hall sensor 230 are electrically connected to the signal interaction system and the PLC overall control system through wires.

[0072] In this embodiment, the PLC is a programmable logic controller, which is a digital operation electronic system designed for industrial environments. It uses a type of programmable memory to store instructions for performing operations such as logic operations, sequential control, timing, counting and arithmetic operations, and controls various types of mechanical equipment or production processes through digital or analog input / output. The PLC can be obtained commercially.

[0073] The control end of the welding machine 23 is electrically connected to the signal interaction system through wires.

[0074] The control ends of the first solenoid valve 15 and the second solenoid valve 24 are electrically connected to the PLC overall control system through electric wires.

[0075] The air port of the clamping cylinder 130 is connected to the air port of the corresponding first solenoid valve 15 through an air pipe, and the air port of the telescopic cylinder 221 is connected to the air port of the corresponding second solenoid valve 24 through an air pipe. With this design, the PLC overall control system can control the operation of the power output ends of the clamping cylinder 130 and the telescopic cylinder 221 by respectively controlling the first solenoid valve 15 and the second solenoid valve 24.

[0076] The function of the handling robot is to pre-identify the model of the vehicle body panel 4 and place it on the corresponding panel placement mechanism 1 .

[0077] In this embodiment, the handling robot is provided with vision to identify the model of the vehicle body panel 4, and the specific identification control principle thereof is well known in the prior art and will not be described in detail here.

[0078] The control end of the handling robot is electrically connected to the PLC overall control system through electric wires.

[0079] like Fig. 9 As shown, the present invention also provides a method for using an automatic TIG welding system suitable for flexible production of multiple models. Based on the above-mentioned automatic TIG welding system suitable for flexible production of multiple models, the method for using includes the following steps: S1, inputting various model information and welding point position parameters of the body panels 4 to be welded into the PLC general control system and the signal interaction system, and at the same time inputting the models and welding point position parameters of the body panels 4 corresponding to the three panel placement mechanisms 1 into the PLC general control system and the signal interaction system; S2, placing the body panel 4 to be welded in a specified area, starting the power supply, and the handling robot first identifies the body panel 4. After identifying the model of the body panel 4, the handling robot places the body panel 4 on the panel placement mechanism 1 of the corresponding workstation; S3, when the proximity switch 137 in the panel placement mechanism 1 for placing the body panel 4 recognizes that the body panel 4 is in place, the model is first identified and confirmed, and then the confirmation and in place signals are fed back to the signal interaction system and the PLC overall control system; S4, the PLC master control system controls the first solenoid valve 15, and then drives the corresponding clamping cylinder 130 to clamp the vehicle body panel 4, and the PLC master control system controls the second solenoid valve 24, and then drives the power output end of the corresponding telescopic cylinder 221 to extend, driving the first welding column 225 to connect with the second welding column 2290, and the gas quick plug 223 to connect with the corresponding gas quick socket 228; S5, the signal interaction system starts the three welding machines 23 that respectively control the first welding gun 163, the second welding gun 1630 and the third welding gun 1631 according to the model of the body panel 4 and the welding point position parameters, so that the first welding gun 163, the second welding gun 1630 and the third welding gun 1631 complete the welding work in sequence, and then completes the welding of the body panel 4; S6. When the Hall sensor 230 detects an abnormal signal during welding, the Hall sensor 230 feeds back the abnormal signal to the signal interaction system, and the signal interaction system transmits the abnormal signal to the PLC general control system for alarm processing; S7. When welding is completed, the PLC general control system controls the start of the first solenoid valve 15, which then releases the clamping action of the clamping assembly 13, controls the handling robot to remove the body panel 4 and place it in the specified area, and the PLC general control system controls the start of the second solenoid valve 24, so that the power output end of the telescopic cylinder 221 retracts, driving the first welding column 225 to separate from the second welding column 2290, and the air quick plug 223 to separate from the corresponding air quick socket 228, and this process is repeated.

[0080] The entire welding process avoids close contact between workers and is highly automated, improving welding quality.

[0081] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An automatic TIG welding system suitable for flexible production of multiple vehicle models, comprising three spaced plate placement mechanisms (1), characterized in that: A gas-electric quick-insertion mechanism (2) is placed on one side of the three panel placement mechanisms (1); a control cabinet (3) is placed next to one of the panel placement mechanisms (1); the three panel placement mechanisms (1) and the gas-electric quick-insertion mechanism (2) are all electrically connected to the control cabinet (3); and a handling robot is also placed on the side of the three panel placement mechanisms (1) away from the gas-electric quick-insertion mechanism (2); The plate placement mechanism (1) comprises a plurality of legs (11) arranged evenly and at intervals, the upper ends of the plurality of legs (11) being fixedly mounted with a same stand (12), two sets of mutually perpendicular clamping assemblies (13) being vertically mounted at the four corners of the stand (12), a TIG welding gun assembly (16) being vertically mounted at the middle of the stand (12), a plurality of sets of supporting assemblies (14) being fixedly mounted at positions close to the TIG welding gun assembly (16) on the stand (12), and a plurality of first solenoid valves (15) being fixedly mounted at one side of the stand (12); The gas-electric quick-insertion mechanism (2) comprises a bracket (21), three groups of gas-electric communication components (22) are evenly spaced on the surface of the bracket (21), a mounting plate (25) is fixedly mounted at a middle position inside the bracket (21), welding machines (23) are fixedly mounted at positions on the mounting plate (25) corresponding to the three groups of gas-electric communication components (22), and the input end of the welding machine (23) is connected to a Hall sensor (230); A plurality of second solenoid valves (24) are fixedly mounted at one side of the bracket (21).

2. The automatic TIG welding system suitable for flexible production of multiple models according to claim 1 is characterized by: The TIG welding gun assembly (16) comprises a third mounting seat (160) fixedly mounted on the stand (12), and a third connecting plate (161) is fixedly mounted on one side of the third mounting seat (160) near the upper end.

3. The automatic TIG welding system suitable for flexible production of multiple models according to claim 2 is characterized by: The third connecting plate (161) is fixedly connected to three welding gun brackets (162), and the ends of the three welding gun brackets (162) away from the third mounting seat (160) are respectively fixedly mounted with a first welding gun (163), a second welding gun (1630), and a third welding gun (1631); The three groups of gas-electricity connection components (22) are respectively connected to the first welding gun (163), the second welding gun (1630), and the third welding gun (1631).

4. The automatic TIG welding system suitable for flexible production of multiple models according to claim 3 is characterized by: The gas-electricity connection assembly (22) comprises a cylinder mounting seat (220) fixedly mounted on the upper end surface of the bracket (21), a telescopic cylinder (221) fixedly mounted on the cylinder mounting seat (220), and a fixing plate (2201) fixedly mounted on the power output end of the telescopic cylinder (221).

5. The automatic TIG welding system suitable for flexible production of multiple models according to claim 4 is characterized by: First insulating pads (224) are fixedly mounted at positions on both sides of the end surface of the fixed plate (2201) away from the telescopic cylinder (221), and a plurality of first welding columns (225) arranged at intervals are fixedly mounted on one end surface of the first insulating pad (224) away from the fixed plate (2201).

6. The automatic TIG welding system suitable for flexible production of multiple models according to claim 5 is characterized by: A first connection block (222) is fixedly mounted between two first insulating pads (224) on the end surface of the fixed plate (2201) away from the telescopic cylinder (221), and a plurality of air quick plugs (223) are fixedly mounted on the first connection block (222).

7. The automatic TIG welding system suitable for flexible production of multiple models according to claim 6 is characterized by: A fixing seat (226) is fixedly mounted on the upper end surface of the bracket (21) at a position close to the cylinder mounting seat (220), and second insulating pads (229) are fixedly mounted at positions on both sides of the end surface of the fixing seat (226) close to the cylinder mounting seat (220), the second insulating pads (229) corresponding to the positions of the first insulating pads (224).

8. The automatic TIG welding system suitable for flexible production of multiple models according to claim 7 is characterized by: A second welding column (2290) is fixedly mounted on the end surface of the second insulating pad (229) close to the cylinder mounting seat (220), and the positions of the second welding columns (2290) respectively correspond to the first welding columns (225).

9. The automatic TIG welding system suitable for flexible production of multiple models according to claim 8 is characterized by: A second connection block (227) is fixedly mounted on the end surface of the fixing seat (226) close to the cylinder mounting seat (220) at a position corresponding to the first connection block (222); a plurality of gas quick sockets (228) are fixedly mounted on the end surface of the second connection block (227) close to the first connection block (222); the gas quick sockets (228) correspond to the gas quick plugs (223).

10. A method for using an automatic TIG welding system suitable for flexible production of multiple models, based on the automatic TIG welding system suitable for flexible production of multiple models as claimed in claim 9, characterized in that: The following steps are involved: S1, inputting various model information of the vehicle body panels (4) to be welded and welding point position parameters into the control cabinet (3); S2, placing the body panel (4) to be welded in a specified area, starting the power supply, and the handling robot first identifies the body panel (4). After identifying the model of the body panel (4), the handling robot places the body panel (4) on the panel placement mechanism (1) of the corresponding workstation; S3, when the clamping assembly (13) in the panel placement mechanism (1) for placing the body panel (4) recognizes that the body panel (4) is in place, it first identifies and confirms its model, and then feeds back the confirmation and in-place signals to the control cabinet (3); S4, the control cabinet (3) controls the corresponding first solenoid valve (15), thereby driving the corresponding clamping assembly (13) to press the vehicle body panel (4), and the control cabinet (3) controls the corresponding second solenoid valve (24), thereby driving the power output end of the corresponding telescopic cylinder (221) to extend, thereby driving the first welding column (225) to connect with the second welding column (2290), and the air quick plug (223) to connect with the corresponding air quick socket (228); S5, the control cabinet (3) sequentially starts three welding machines (23) that respectively control a first welding gun (163), a second welding gun (1630), and a third welding gun (1631) according to the model of the vehicle body panel (4) and the welding point position parameters, so that the first welding gun (163), the second welding gun (1630), and the third welding gun (1631) sequentially complete the welding work, thereby completing the welding of the vehicle body panel (4); S6. When the Hall sensor (230) detects an abnormal signal during welding, the Hall sensor (230) feeds back the abnormal signal to the control cabinet (3), and the control cabinet (3) performs alarm processing; S7. After welding is completed, the control cabinet (3) controls the start of the first solenoid valve (15), which then causes the clamping assembly (13) to release the clamping action. The control cabinet (3) controls the start of the second solenoid valve (24), which then causes the pneumatic and electrical quick-connect mechanism (2) to disengage. The control cabinet (3) controls the handling robot to remove the vehicle body panel (4) and place it in a specified area, and this process is repeated.

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