Seam welder and production line

Abstract

The utility model discloses a seam welding machine and a production line. The seam welding machine comprises a material storage component; forming the component; the welding part comprises an upper electrode wheel and a lower electrode wheel which are arranged in a matched mode. A shearing member; a positioning fixture; the multi-axis driving component is connected with the positioning clamp and used for driving the positioning clamp to move in a multi-degree-of-freedom mode, the positioning clamp can move along a preset space track, and at least one of the upper electrode wheel and the lower electrode wheel is arranged in the mode that the inclination angle can be adjusted, so that the positioning clamp can be matched with a welding component for welding. According to the seam welder, welding wires are used for welding, the welding wires are formed through the forming component, copper wires are worn and sheared through the shearing component, the electrode wheel can be used for a long time, and the problem that welding quality is unstable due to the fact that electrodes adhere to workpieces is solved as far as possible; meanwhile, the position-variable upper electrode wheel and / or the position-variable lower electrode wheel are / is arranged and matched with the multi-axis driving component capable of enabling the workpiece to move on the space track, and the welding device is suitable for welding the oil tank with the space track, so that the production efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of seam welding, and in particular to a seam welding machine and a production line. Background Art

[0002] The fuel tank seam welding machine in the related art has the following disadvantages:

[0003] 1. The electrode wheel is in direct contact with the workpiece. It needs to be ground after being worn and adhered to the workpiece. It needs to be replaced after being ground to a certain extent. If the electrode is not ground, the welding quality and efficiency will be seriously affected.

[0004] 2. Because the upper and lower electrode wheel heads are fixed and cannot follow spatial trajectories such as the ascending and descending sections, it is impossible to weld the oil tank with spatial trajectories.

[0005] 3. Even if there is a related technology of using a seam welding machine using a profiling die, this related technology achieves welding by designing the moving trajectory of the oil tank and the trajectory of the profiling die to be consistent. However, if the customer has many oil tanks with different welding trajectories, different profiling dies are required. The profiling dies must be replaced and debugged when changing the mold. The work efficiency is low when there are many types of workpieces to change the mold. Summary of the invention

[0006] The purpose of the present application is to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a seam welding machine that can solve the problem of unstable welding quality caused by electrode adhesion to the workpiece as much as possible, and can be suitable for welding oil tanks with spatial tracks, thereby improving production efficiency and reducing costs.

[0007] The present application also proposes a production line comprising the above-mentioned seam welding machine.

[0008] A seam welding machine according to an embodiment of the first aspect of the present application includes:

[0009] A material storage component, used for supplying welding wire;

[0010] Forming components, used to extrude the welding wire into a preset shape;

[0011] The welding component includes an upper electrode wheel and a lower electrode wheel which are arranged in a coordinated manner, wherein the upper electrode wheel and the lower electrode wheel use the formed welding wire for welding and take away the coating;

[0012] A shearing component, used for shearing the welding wire with attached coating;

[0013] Positioning fixture, used to clamp the workpiece;

[0014] A multi-axis driving component is connected to the positioning fixture, and the multi-axis driving component is used to drive the positioning fixture to move with multiple degrees of freedom so that the positioning fixture can move along a preset spatial trajectory, and at least one of the upper electrode wheel and the lower electrode wheel can be set with an adjustable tilt angle so that the positioning fixture can be welded in coordination with the welding component.

[0015] The seam welding machine according to the first aspect embodiment of the present application has at least the following beneficial effects: this seam welding machine uses welding wire for welding, and uses a forming component to shape the welding wire. The copper wire is consumed and sheared by a shearing component, so that the electrode wheel can be used for a long time, and the problem of unstable welding quality caused by electrode adhesion to the workpiece is solved as much as possible; at the same time, by providing a variable upper electrode wheel and / or lower electrode wheel, in conjunction with a multi-axis driving component that can move the workpiece along a spatial trajectory, it is suitable for welding oil tanks with a spatial trajectory, thereby improving production efficiency and reducing costs.

[0016] According to the seam welding machine described in the embodiment of the first aspect of the present application, the seam welding machine also includes a frame, an operating component and an electric cabinet, the forming component, the welding component, the shearing component, the operating component and the electric cabinet are arranged on the frame, the operating component is suitable for controlling the forming component, the welding component, the shearing component and the multi-axis drive component, and the electric cabinet is used to provide electrical energy to the material storage component, the forming component, the welding component, the shearing component and the multi-axis drive component.

[0017] According to the seam welding machine described in the embodiment of the first aspect of the present application, a water cooling assembly and an air circuit assembly are also provided on the frame, and the water cooling assembly and the air circuit assembly are suitable for connecting with at least one of the forming component, the welding component, the shearing component and the multi-axis driving component, the water cooling assembly is used for cooling, and the air circuit assembly is used for air supply.

[0018] According to the seam welding machine described in the embodiment of the first aspect of the present application, the operating component includes at least one of a rocker arm operating box or a mobile teaching pendant.

[0019] According to the seam welding machine described in the embodiment of the first aspect of the present application, the frame is also provided with a guide wheel, a tensioning wheel and a straightening wheel, the straightening wheel is arranged between the material storage component and the forming component, the guide wheel is used to guide the welding wire so that after the welding wire is output from the material storage component, it passes through the straightening wheel, the forming component, the welding component and the shearing component in sequence, and the tensioning wheel is arranged at a preset position of the welding wire and is used for tensioning.

[0020] According to the seam welding machine described in the first aspect embodiment of the present application, the multi-axis driving component includes a revolution component, a rotation component, a lifting component and a translation component, the positioning fixture is arranged on the rotation component, the rotation component is suitable for driving the positioning fixture to rotate, the revolution component is suitable for driving the rotation component to revolve, the lifting component is suitable for driving the rotation component to lift and lower, and the translation component is suitable for driving the rotation component to translate; during welding, at least one of the revolution component, the rotation component, the lifting component and the translation component moves to enable the positioning fixture to move along a preset spatial trajectory.

[0021] According to the seam welding machine described in the embodiment of the first aspect of the present application, the positioning fixture is detachably arranged on the rotation assembly.

[0022] According to the seam welding machine described in the embodiment of the first aspect of the present application, the welding component includes a rotating drive component and a conductive component, the rotating drive component is suitable for connecting to at least one of the upper electrode wheel and the lower electrode wheel to adjust the inclination angle, and the conductive component is used to transfer current to the upper electrode wheel and the lower electrode wheel.

[0023] According to the seam welding machine described in the embodiment of the first aspect of the present application, a plurality of positioning structures are provided on the positioning fixture, and at least part of the positioning structures are used to position the workpiece.

[0024] The production line according to the second aspect embodiment of the present application includes: the seam welding machine as described in the first aspect embodiment of the present application.

[0025] It is not difficult to understand that the production line in the second aspect embodiment of the present application has the technical effect of the seam welding machine in the first aspect embodiment described above, and therefore will not be described in detail.

[0026] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present application is further described below with reference to the accompanying drawings and embodiments;

[0028] Figure 1 This is a schematic diagram of the structure of an embodiment of the present application from a first viewing angle;

[0029] Figure 2 It is a structural schematic diagram of the second viewing angle of the embodiment of the present application.

[0030] Reference numerals:

[0031] 100. Material storage components;

[0032] 200, molded parts;

[0033] 300. Welding parts;

[0034] 400, shearing parts;

[0035] 500, positioning fixture;

[0036] 600, multi-axis driving component; 610, revolution component; 620, rotation component; 630, lifting component; 640, translation component;

[0037] 700, rack; 710, operating assembly; 720, electrical cabinet; 730, water cooling assembly; 740, gas circuit assembly; 750, guide wheel; 760, tension wheel; 770, straightening wheel. DETAILED DESCRIPTION

[0038] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0039] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0040] In the description of this application, "several" means one or more, "more" means at least two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0041] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application after combining the specific content of the technical solution.

[0042] Reference Figure 1 to Figure 2 The seam welding machine of the first embodiment of the present application can be applied to the production of automobile fuel tanks. The seam welding machine includes a material storage component 100, a forming component 200, a welding component 300, a shearing component 400, a positioning fixture 500 and a multi-axis driving component 600.

[0043] The material storage component 100 is used to supply welding wire; the forming component 200 is used to extrude the welding wire into a preset shape; the welding component 300 includes an upper electrode wheel and a lower electrode wheel that are arranged in conjunction with each other, and the upper electrode wheel and the lower electrode wheel use the formed welding wire for welding and take away the coating; the shearing component 400 is used to shear the welding wire with the coating attached; the positioning fixture 500 is used to clamp the workpiece; the multi-axis driving component 600 is connected to the positioning fixture 500, and the multi-axis driving component 600 is used to drive the positioning fixture 500 to move with multiple degrees of freedom, so that the positioning fixture 500 can move along a preset spatial trajectory, and at least one of the upper electrode wheel and the lower electrode wheel can be arranged with an adjustable inclination angle, so that the positioning fixture 500 can cooperate with the welding component 300 for welding.

[0044] It is understandable that the positioning fixture 500 is set on the multi-axis driving component 600, and the multi-axis driving component 600 can drive the positioning fixture 500 to move along the direction of multiple degrees of freedom to complete the preset spatial trajectory movement so as to cooperate with the welding component 300 to achieve welding. The upper electrode wheel and / or the lower electrode wheel of the welding component 300 can be adjusted so that the oil tank with a spatial trajectory can be welded more accurately to ensure the welding quality. In some embodiments, the positioning fixture 500 uses a structure that is adapted to the workpiece to be processed so that the workpiece can be reliably fixed. In some embodiments, at least one of the upper electrode wheel and the lower electrode wheel can be selected to be set as a movable setting according to the actual workpiece to be processed. In other embodiments, the upper electrode wheel can be set to adjust the inclination angle, and the lower electrode wheel is fixed to cooperate with the upper electrode wheel to achieve processing.

[0045] In some embodiments, the material storage component 100 is used to store materials, and can be a material storage frame, a tank, etc., and the material storage component 100 can be adjusted in position and can be covered with a dustproof cloth to prevent dust. After the welding wire is used up, a small crane or a trolley is used to put the rolled welding wire in. In some embodiments, the welding wire can be made of materials such as copper, tin or aluminum, and can be selected and used according to different welding materials. The use of copper wire as a conductive medium can prevent the electrode from sticking to the workpiece. Based on the extrusion of the forming component 200, the welding wire can be extruded into a special shape, so that the medium is continuously added between the welding component 300 and the workpiece to ensure that the electrode condition of each weld point is consistent, thereby achieving continuous high-quality welding, avoiding the loss of the electrode wheel as much as possible, and reducing the need for grinding and replacing the electrode wheel.

[0046] In some embodiments, the forming component 200 includes two forming wheels, and the forming wheels are provided with forming grooves for the welding wire to pass through, and the two forming wheels are arranged in cooperation and used to extrude and form the welding wire. It is understandable that the two forming grooves on the two forming wheels are arranged in cooperation and enclose a space for extruding and forming the welding wire. In some embodiments, the specific shape of the forming groove can be designed specifically so that the formed welding wire is suitable for use in the welding component 300. The shearing component 400 includes a wire grabbing wheel and a shearing wheel, and the wire grabbing wheel and the shearing wheel are arranged in cooperation, the wire grabbing wheel is used to grab the welding wire, and the shearing wheel is used to shear the welding wire. It is understandable that the wire grabbing wheel grabs the welding wire and sends the welding wire to the shearing wheel for shearing, wherein the length of the sheared welding wire can be achieved by increasing or decreasing the cutter on the shearing wheel.

[0047] Reference Figure 1 to Figure 2 The seam welding machine of the first aspect embodiment of the present application utilizes welding wire for welding, utilizes a forming component 200 to form the welding wire, and the copper wire is consumed and sheared by a shearing component 400, so that the electrode wheel can be used for a long time, and the problem of unstable welding quality caused by electrode adhesion to the workpiece is solved as much as possible; at the same time, by providing a variable upper electrode wheel and / or lower electrode wheel, in conjunction with a multi-axis driving component 600 that can move the workpiece along a spatial trajectory, it is suitable for welding oil tanks with a spatial trajectory, thereby improving production efficiency and reducing costs.

[0048] In some embodiments of the present application, the seam welding machine further comprises a frame 700, an operating assembly 710 and an electric cabinet 720, wherein the forming component 200, the welding component 300, the shearing component 400, the operating assembly 710 and the electric cabinet 720 are arranged on the frame 700, the operating assembly 710 is suitable for controlling the forming component 200, the welding component 300, the shearing component 400 and the multi-axis driving component 600, and the electric cabinet 720 is used to provide electric energy for the storage component 100, the forming component 200, the welding component 300, the shearing component 400 and the multi-axis driving component 600. It is understandable that the frame 700 is used as a bearing platform, and the storage component 100, the straightening component, the forming component 200, the welding component 300, the shearing component 400 and the multi-axis driving component 600 are arranged on the frame 700 to be in a suitable position, so as to facilitate the threading and winding of the welding wire so that the welding component 300 and the multi-axis driving component 600 can cooperate to achieve welding. The electric cabinet 720 is used to provide electric energy and power protection for the seam welder to ensure the normal operation of the seam welder. The operating component 710 is integrated with a control system for controlling the seam welder. The technician can control the various mechanisms of the seam welder through the operating component 710 to achieve automated operation.

[0049] In some embodiments, a water cooling assembly 730 and an air circuit assembly 740 are further provided on the frame 700. The water cooling assembly 730 and the air circuit assembly 740 are suitable for connecting with at least one of the forming component 200, the welding component 300, the shearing component 400 and the multi-axis driving component 600. The water cooling assembly 730 is used for cooling, and the air circuit assembly 740 is used for gas supply. It can be understood that in order to realize normal welding operation and drive at least part of the activities of the material storage component 100, the forming component 200, the welding component 300, the shearing component 400 and the multi-axis driving component 600, the corresponding water cooling assembly 730 needs to be configured to cool each mechanism, and the air circuit assembly 740 needs to be configured to ensure the smooth operation of each mechanism. The specific setting mode of the water cooling assembly 730 and the air circuit assembly 740 can be adjusted and set according to the actual specific structure of the seam welding machine and the workpiece to be welded, and will not be described in detail here.

[0050] In some embodiments, the operating assembly 710 includes at least one of a rocker operating box or a mobile teach pendant. It is understandable that the rocker operating box can adjust the position by using its cantilever, so that the technician can control the seam welder at a suitable position, and the mobile teach pendant is convenient for handheld communication or control. By setting the motion parameters and programming the motion path of the robot, the robot can work according to the programmed process file, and the robot's motion can be monitored, adjusted, and safely stopped in real time. It can also be configured in manual control mode to operate the robot movement in real time.

[0051] In some embodiments of the present application, the frame 700 is further provided with a guide wheel 750, a tension wheel 760 and a straightening wheel 770, the straightening wheel 770 is arranged between the storage part 100 and the forming part 200, the guide wheel 750 is used to guide the welding wire, so that the welding wire passes through the straightening wheel 770, the forming part 200, the welding part 300 and the shearing part 400 in sequence after being output from the storage part 100, and the tension wheel 760 is arranged at a preset position of the welding wire and used for tensioning. It can be understood that the function of the guide wheel 750 is to change the direction of the welding wire so that the welding wire can pass through each component in sequence, and the welding wire after welding is cut and recycled, which effectively reduces the packaging efficiency of the recycled materials, and the straightening wheel 770 and the tension wheel 760 are used to ensure that the transported welding wire is straightened to improve the welding quality. In some embodiments, the guide wheel 750, the tension wheel 760 and the straightening wheel 770 are arranged according to demand, so as to adjust the introduction direction and angle of the welding wire, thereby optimizing the overall layout.

[0052] In some embodiments of the present application, the multi-axis driving component 600 includes a revolution component 610, a rotation component 620, a lifting component 630 and a translation component 640. The positioning fixture 500 is arranged on the rotation component 620. The rotation component 620 is suitable for driving the positioning fixture 500 to rotate. The revolution component 610 is suitable for driving the rotation component 620 to revolve. The lifting component 630 is suitable for driving the rotation component 620 to lift and lower. The translation component 640 is suitable for driving the rotation component 620 to translate. During welding, at least one of the revolution component 610, the rotation component 620, the lifting component 630 and the translation component 640 moves to enable the positioning fixture 500 to move along a preset spatial trajectory. It can be understood that in order to weld the oil tank with a spatial trajectory, a multi-axis driving component 600 is required to drive the positioning fixture 500 to move at least in the horizontal direction, the vertical direction, and the rotation in space, so as to cope with the welding of the oil tank with a spatial trajectory. For this purpose, a revolution component 610, a rotation component 620, a lifting component 630 and a translation component 640 are integrated to drive the positioning fixture 500 to move along multiple degrees of freedom.

[0053] In some embodiments, the rotation component 620 is configured as a rotation axis, the revolution component 610 includes a revolution axis and a chassis, the rotation axis is arranged on the chassis, the translation component 640 includes a translation axis and a translation mounting seat, the revolution component 610 is arranged on the translation mounting seat and is driven by the translation axis, the lifting component 630 includes a lifting axis and a lifting mounting seat, the translation component 640 is arranged on the lifting mounting seat and is driven by the lifting axis.

[0054] In some embodiments of the present application, the positioning fixture 500 is detachably arranged on the rotation assembly 620. It can be understood that the changeable fixture can be changed into oil tanks of different specifications, and the seam welding machine can select different positioning fixtures 500 according to different workpieces to be processed through the detachable arrangement to achieve reliable clamping.

[0055] In some embodiments of the present application, the welding component 300 includes a rotary drive component and a conductive component, the rotary drive component is suitable for connecting with at least one of the upper electrode wheel and the lower electrode wheel to adjust the tilt angle, and the conductive component is used to transmit current to the upper electrode wheel and the lower electrode wheel. It can be understood that the rotary drive component is controlled to drive at least one of the upper electrode wheel and the lower electrode wheel to swing up and down, thereby adjusting the interval between the upper electrode wheel and the lower electrode wheel to clamp the welding wire, and can effectively deal with the oil tank with a spatial track to ensure the welding quality.

[0056] In some embodiments, the conductive component may be a structure such as a copper busbar for conducting electricity to the electrode wheel. The rotary drive component includes a movably arranged mounting seat and a driving member. The upper electrode wheel is arranged on the mounting seat. The driving member enables the mounting seat to swing through the arrangement of a transmission member, thereby achieving adjustment of the inclination angle of at least one of the upper electrode wheel and the lower electrode wheel.

[0057] In some embodiments of the present application, the positioning fixture 500 is provided with a plurality of positioning structures, at least some of which are used to position the workpiece. It is understandable that the positioning fixture 500 is selected to have a structure adapted to the workpiece to be processed so that the workpiece can be reliably fixed. The workpiece can be reliably positioned by the targeted setting of the positioning structure.

[0058] In some embodiments, the positioning structure includes but is not limited to positioning holes, positioning blocks, positioning columns, positioning ribs, and the like.

[0059] It should be noted that, refer to Figure 1 to Figure 2 , the seam welding machine of the first embodiment of the present application, when preparing for work, manually pull the copper wire out of the material storage part 100, insert it into the guide wheel 750, insert it into the tension wheel 760 through the guide wheel 750, enter the variable welding part 300 through the tension wheel 760, then enter the tension wheel 760 on the back of the welding machine through the guide wheel, and finally insert it into the shearing part 400. In some embodiments, the copper wire insertion method of the upper electrode wheel and the lower electrode wheel is the same. Further, manually put the oil tank into the positioning fixture 500, start the welding machine by pressing the button, position and clamp the oil tank and detect whether the oil tank is present, the positioning fixture 500 in the multi-axis driving part 600 automatically sends the oil tank between the upper electrode wheel and the lower electrode wheel through the translation axis, the upper electrode wheel in the variable welding part 300 presses the workpiece, the multi-axis driving part 600, the forming part 200, and the shearing part 400 start to run, and the welding part 300 starts discharge welding at the same time, until the welding is completed, the oil tank is pushed out to the working position, and other systems are reset.

[0060] Reference Figure 1 to Figure 2 The production line of the second embodiment of the present application can be a production line for automobile fuel tanks, and the production line includes the seam welding machine of the first embodiment of the present application. The present invention uses copper wire to contact the workpiece, and the electrode wheel to contact the copper wire. The copper wire is consumed as a conductive medium, so the electrode wheel will not adhere to the workpiece, and the service life is greatly improved. At the same time, fuel tanks with spatial trajectories can be welded, such as trajectories with horizontal straight segments, rounded corners, horizontal curves, rising and falling segments, where the rising and falling segments belong to the spatial trajectory, to realize the automation of fuel tank welding and reduce the demand for labor.

[0061] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A seam welding machine, characterized in that: include: A material storage component, used for supplying welding wire; Forming components, used to extrude the welding wire into a preset shape; The welding component includes an upper electrode wheel and a lower electrode wheel which are arranged in a coordinated manner, wherein the upper electrode wheel and the lower electrode wheel use the formed welding wire for welding and take away the coating; A shearing component, used for shearing the welding wire with attached coating; Positioning fixture, used to clamp the workpiece; A multi-axis driving component is connected to the positioning fixture, and the multi-axis driving component is used to drive the positioning fixture to move with multiple degrees of freedom so that the positioning fixture can move along a preset spatial trajectory, and at least one of the upper electrode wheel and the lower electrode wheel can be set with an adjustable tilt angle so that the positioning fixture can be welded in coordination with the welding component.

2. The seam welding machine according to claim 1, characterized in that: The seam welding machine also includes a frame, an operating component and an electric cabinet. The forming component, welding component, shearing component, operating component and electric cabinet are arranged on the frame. The operating component is suitable for controlling the forming component, welding component, shearing component and multi-axis driving component. The electric cabinet is used to provide electrical energy for the material storage component, the forming component, the welding component, the shearing component and the multi-axis driving component.

3. The seam welding machine according to claim 2, characterized in that: The frame is also provided with a water cooling assembly and an air circuit assembly, which are suitable for connecting with at least one of the forming component, welding component, shearing component and multi-axis driving component. The water cooling assembly is used for cooling, and the air circuit assembly is used for air supply.

4. The seam welding machine according to claim 2, characterized in that: The operating assembly includes at least one of a rocker arm operating box or a mobile teaching pendant.

5. The seam welding machine according to claim 2, characterized in that: The frame is also provided with a guide wheel, a tensioning wheel and a straightening wheel. The straightening wheel is arranged between the material storage component and the forming component. The guide wheel is used to guide the welding wire so that after the welding wire is output from the material storage component, it passes through the straightening wheel, the forming component, the welding component and the shearing component in sequence. The tensioning wheel is arranged at a preset position of the welding wire and is used for tensioning.

6. The seam welding machine according to claim 1, characterized in that: The multi-axis driving component includes a revolution component, a rotation component, a lifting component and a translation component. The positioning fixture is arranged on the rotation component. The rotation component is suitable for driving the positioning fixture to rotate, the revolution component is suitable for driving the rotation component to revolve, the lifting component is suitable for driving the rotation component to lift and lower, and the translation component is suitable for driving the rotation component to translate. During welding, at least one of the revolution component, the rotation component, the lifting component and the translation component moves to enable the positioning fixture to move along a preset spatial trajectory.

7. The seam welding machine according to claim 6, characterized in that: The positioning fixture is detachably arranged on the rotation component.

8. The seam welding machine according to claim 1, characterized in that: The welding component comprises a rotation drive component and a conductive component, wherein the rotation drive component is adapted to be connected to at least one of the upper electrode wheel and the lower electrode wheel to adjust the tilt angle, and the conductive component is used to transmit current to the upper electrode wheel and the lower electrode wheel.

9. The seam welding machine according to claim 1, characterized in that: The positioning fixture is provided with a plurality of positioning structures, and at least part of the positioning structures are used for positioning the workpiece.

10. A production line, characterized in that: include: A seam welding machine as claimed in any one of claims 1 to 9.

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