Welding apparatus and welding method thereof

Abstract

A welding apparatus and a welding method thereof. The welding apparatus comprises a rack (100), a first welding mechanism (200), a second welding mechanism (300), and a fixing assembly (400); the first welding mechanism (200) comprises a fixed platform (210) and a plurality of first electrodes (220) provided on the fixed platform (210), the fixed platform (210) is fixed on the rack (100), and the first electrodes (220) can stretch and retract; the second welding mechanism (300) comprises a movable platform (310) and a plurality of second electrodes (320) provided on the movable platform (310), the movable platform (310) is movably arranged on the rack (100), and the second electrodes (320) have one-to-one correspondence to and are arranged opposite to the first electrodes (220); the fixing assembly (400) is used for fixing, between the first electrodes (220) and the second electrodes (320), a workpiece (710) to be welded.

Description

Welding device and welding method thereof Technical Field

[0001] The present application relates to the technical field of vehicle body welding, and in particular to a welding device and a welding method thereof. Background Art

[0002] With the rapid growth of automobile consumption, the automotive industry is facing increasing demands for production capacity, which in turn requires further increases in vehicle production speed. Vehicle body components are primarily manufactured from cold-rolled steel stampings with excellent stamping and welding processability, which are then assembled and welded. Welding is labor-intensive and requires high quality.

[0003] In the related art, during welding, the workpiece to be welded is generally placed on an assembly line, and a plurality of welding stations are sequentially arranged along the assembly line so as to sequentially weld welding points at different positions on the workpiece to be welded.

[0004] However, the assembly line welding method has many workstations, long operation time, high cost and low efficiency.

[0005] Summary of the Invention

[0006] Based on this, it is necessary to provide a welding device and a welding method thereof to address the problems of the assembly line welding method, which has a large number of workstations, long operation time, high cost and low efficiency.

[0007] A welding device, comprising:

[0008] frame;

[0009] A first welding mechanism includes a fixed platform and a plurality of first electrodes arranged on the fixed platform, wherein the fixed platform is fixed to the frame, and the first electrodes are capable of telescopic movement relative to the fixed platform;

[0010] a second welding mechanism comprising a movable platform and a plurality of second electrodes disposed on the movable platform, wherein the movable platform is movably disposed on the frame, the second electrodes corresponding to and opposite to the first electrodes, and the movable platform is used to drive the second electrodes toward or away from the corresponding first electrodes; and

[0011] A fixing assembly is connected to the frame or the fixing platform, and is used to fix the workpiece to be welded between the first electrode and the second electrode.

[0012] In one embodiment, the fixed platform and the movable platform are arranged opposite to each other in a vertical direction, and the first electrode and the second electrode are respectively arranged on a side of the fixed platform and the movable platform that are close to each other.

[0013] In one embodiment, the fixing assembly includes a support member and a fastener, the support member includes at least two support columns, at least two of the support columns are arranged at intervals on the fixing platform, the fastener is arranged on the fixing platform, the support column is used to support the workpiece to be welded, and the fastener is used to fasten the workpiece to be welded to the support column.

[0014] In one embodiment, the first welding mechanism includes a plurality of first power mechanisms arranged on the fixed platform, and the plurality of first power mechanisms are connected one-to-one with one end of the plurality of first electrodes close to the fixed platform, and the first power mechanisms are respectively used to drive the corresponding first electrodes to move telescopically relative to the fixed platform.

[0015] In one embodiment, the second welding mechanism includes a plurality of second power mechanisms arranged on the movable platform, and the plurality of second power mechanisms are connected one-to-one with a plurality of second electrodes close to one end of the movable platform, and the second power mechanisms are respectively used to drive the corresponding second electrodes to move telescopically relative to the movable platform.

[0016] In one embodiment, the first welding mechanism includes a first locking assembly, the first locking assembly is disposed on the fixed platform, and the first locking assembly is used to lock the first electrode;

[0017] The second welding mechanism includes a second locking assembly, which is disposed on the movable platform and is used to lock the second electrode.

[0018] In one embodiment, the first electrode is movably disposed on the fixed platform, and the second electrode is movably disposed on the movable platform.

[0019] In one embodiment, the plurality of first electrodes are divided into first direction electrodes and second direction electrodes arranged at at least one angle to the first direction electrodes, and the plurality of second electrodes are divided into third direction electrodes and fourth direction electrodes arranged at at least one angle to the third direction electrodes, the first direction electrodes and the third direction electrodes correspond one-to-one and are arranged relative to each other, and the second direction electrodes and the fourth direction electrodes correspond one-to-one and are arranged relative to each other.

[0020] In one embodiment, the second direction electrode and the fourth direction electrode respectively include a connecting segment and an electrode segment, the electrode segment is rotatably connected to one end of the connecting segment, the connecting segment of the second direction electrode is connected to the fixed platform at one end away from the electrode segment, and the connecting segment of the fourth direction electrode is connected to the movable platform at one end away from the electrode segment.

[0021] In one embodiment, the welding device includes a grinding mechanism, which includes a first moving mechanism, a grinding platform arranged on the first moving mechanism, and a plurality of grinding units arranged on the grinding platform. The first moving mechanism is used to drive the grinding platform to move between the first electrode and the second electrode. The grinding units are arranged in a one-to-one correspondence with the first electrode, or the grinding units are arranged in a one-to-one correspondence with the second electrode, or the grinding units are arranged in a one-to-one correspondence with both the first electrode and the second electrode.

[0022] In one embodiment, each of the grinding units includes two grinding heads respectively disposed on opposite sides of the grinding platform, and the two grinding heads are respectively used to simultaneously interface with the first electrode and the second electrode disposed opposite to each other.

[0023] In one embodiment, the welding device includes a cap removal mechanism, which includes a second moving mechanism, a cap removal platform arranged on the second moving mechanism, and a plurality of cap removal units arranged on the cap removal platform. The second moving mechanism is used to drive the cap removal platform to move between the first electrode and the second electrode. Each of the cap removal units includes two cap removal heads respectively arranged on two opposite sides of the cap removal platform. The two cap removal heads are respectively used to simultaneously remove the caps from the first electrode and the second electrode arranged opposite to each other.

[0024] In one embodiment, the cap-removing and replacing mechanism includes a plurality of cap-removing units arranged on the cap-removing and replacing platform, the cap-removing unit includes a shell and a first electrode cap and a second electrode cap coaxially arranged in the shell, the openings of the first electrode cap and the second electrode cap are opposite to each other, the first electrode is used to extend into the first electrode cap at a preset pressure, and the second electrode is used to extend into the second electrode cap at a preset pressure, and the grinding mechanism and the cap-removing and replacing mechanism are located on any two sides of the outer periphery of the frame.

[0025] In one embodiment, the grinding mechanism and the cap removal and replacement mechanism are respectively located on two opposite sides of the frame.

[0026] A welding method using a welding device comprises the following steps:

[0027] placing the workpiece to be welded on a fixed assembly;

[0028] A plurality of first electrodes are extended relative to the fixed platform and abutted against one side of the workpiece to be welded with a first pressure, and then the first electrodes are locked;

[0029] The movable platform drives the plurality of second electrodes to move toward the workpiece to be welded, and abuts against the other side of the workpiece to be welded with a second pressure, wherein the first pressure is less than the second pressure;

[0030] The first electrode and the second electrode are started simultaneously to weld the workpieces to be welded.

[0031] In one embodiment, the step of placing the workpiece to be welded on the fixing assembly includes moving the workpiece to be welded from a first side of the frame to the fixing assembly;

[0032] After the step of simultaneously starting the first electrode and the second electrode to weld the workpiece to be welded, the step further includes moving the workpiece to be welded from a second side of the frame to outside the welding device, where the first side is opposite to the second side.

[0033] A welding method using a welding device comprises the following steps:

[0034] The first moving mechanism drives the grinding platform to move between the first electrode and the second electrode, and enables the grinding units to be arranged in a one-to-one correspondence with the first electrodes;

[0035] The plurality of first electrodes are moved and extended to abut against the corresponding grinding units;

[0036] The movable platform drives the plurality of second electrodes to move so as to abut against the corresponding grinding units;

[0037] The grinding unit grinds the plurality of first electrodes and the plurality of second electrodes simultaneously.

[0038] A welding method using a welding device comprises the following steps:

[0039] The second moving mechanism drives the cap removal platform to move between the first electrode and the second electrode, and enables the cap removal units to be arranged in a one-to-one correspondence with the first electrodes;

[0040] The plurality of first electrodes are moved and extended to abut against the corresponding cap removal units;

[0041] The movable platform drives the plurality of second electrodes to move so as to abut against the corresponding cap removal units;

[0042] The plurality of decapping units decaps the plurality of first electrodes and the plurality of second electrodes simultaneously.

[0043] In one embodiment, the welding method further comprises the following steps:

[0044] The second moving mechanism drives the cap removal and replacement platform to move, and the cap replacement units are arranged in a one-to-one correspondence with the first electrodes;

[0045] The plurality of first electrodes are moved and extended, and are respectively inserted into the corresponding first electrode caps with a preset pressure, so that the first electrode caps are pressed onto the first electrodes;

[0046] The movable platform drives the plurality of second electrodes to move and extends into the second electrode cap with a preset pressure, so that the second electrode cap is pressed onto the second electrode.

[0047] In the above-mentioned welding device and welding method, in this embodiment, by providing multiple first electrodes and second electrodes that are positioned opposite and corresponding to the first electrodes, the first electrodes and the second electrodes can simultaneously weld all the welding points on the workpiece to be welded, only one welding station is required, and the welding efficiency is greatly improved. At the same time, the workpiece to be welded is provided on a fixed assembly, rather than directly on the first electrode or the second electrode, which can prevent the workpiece to be welded from crushing the first electrode or the second electrode; at the same time, a fixed assembly is provided, and the workpiece to be welded is fixed between the first electrode and the second electrode by the fixed assembly, so that the first electrode can be subsequently extended to abut against one side of the workpiece to be welded, and the movable platform drives the second electrode to move to abut against the other side of the workpiece to be welded, so that all welding points can be welded simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] FIG1 is a schematic structural diagram of a welding device during welding in one embodiment.

[0049] FIG2 is a schematic structural diagram of a welding device in an embodiment when not welding.

[0050] FIG3 is an enlarged structural diagram of point A in FIG1 .

[0051] FIG4 is a schematic structural diagram of an electrode during grinding in one embodiment.

[0052] FIG5 is an enlarged structural diagram of point B in FIG4 .

[0053] FIG6 is a schematic structural diagram of a cap removal and replacement mechanism in one embodiment.

[0054] FIG7 is an enlarged structural diagram of point C in FIG6 .

[0055] Reference numerals: 100, frame;

[0056] 200, first welding mechanism; 210, fixed platform; 220, first electrode; 221, first direction electrode; 222, second direction electrode; 230, first power mechanism;

[0057] 300, second welding mechanism; 310, movable platform; 320, second electrode; 321, third direction electrode; 322, fourth direction electrode; 330, second power mechanism;

[0058] 400, fixing assembly; 410, supporting column;

[0059] 500, grinding mechanism; 510, grinding platform; 520, grinding unit; 521, grinding head;

[0060] 600, cap removal and replacement mechanism; 610, cap removal and replacement platform; 630, cap replacement unit; 631, first electrode cap; 632, second electrode cap; 633, housing;

[0061] 710, workpiece to be welded; 720, welded workpiece. DETAILED DESCRIPTION

[0062] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0063] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does 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 cannot be understood as a limitation on this application.

[0064] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0065] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0066] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0067] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0068] Referring to Figures 1-3, one embodiment of the present application discloses a welding device, which includes a frame 100, a first welding mechanism 200, a second welding mechanism 300, and a fixing assembly 400. The first welding mechanism 200 includes a fixed platform 210 and a plurality of first electrodes 220 disposed on the fixed platform 210. The fixed platform 210 is fixed to the frame 100, and the first electrodes 220 are capable of telescopic movement relative to the fixed platform 210. The second welding mechanism 300 includes a movable platform 310 and a plurality of second electrodes 320 disposed on the movable platform 310. The movable platform 310 is movably disposed on the frame 100, and the second electrodes 320 correspond to and are disposed opposite to the first electrodes 220. The movable platform 310 is configured to move the second electrodes 320 toward or away from the corresponding first electrodes 220. The fixing assembly 400 is connected to the frame 100 or the fixed platform 210 and is configured to fix the workpiece 710 to be welded between the first and second electrodes 220, 320.

[0069] When the welding device is in operation, the workpiece 710 to be welded is first placed on the fixed assembly 400. Then, the multiple first electrodes 220 are extended relative to the fixed platform 210 to lightly contact one side of the workpiece 710 with a small pressure. At the same time, the movable platform 310 drives the multiple second electrodes 320 to move to contact the other side of the workpiece 710 with a large pressure. Finally, the multiple first electrodes 220 and the multiple second electrodes 320 perform welding operations simultaneously. The first electrodes 220 and the corresponding second electrodes 320 respectively contact the two sides of the same weld point. The contact force between the first electrode 220 and the workpiece 710 is smaller than the contact force between the second electrode 320 and the workpiece 710, and therefore, it is simply described as a small pressure. The contact force between the second electrode 320 and the workpiece 710 is greater than the contact force between the first electrode 220 and the workpiece 710, and therefore, it is simply described as a large pressure.

[0070] In this embodiment, by providing a plurality of first electrodes 220 and second electrodes 320 that are positioned opposite and one-to-one with the first electrodes 220, the first electrodes 220 and the second electrodes 320 can simultaneously weld all the welds on the workpiece 710 to be welded, requiring only one welding station, and greatly improving the welding efficiency. At the same time, the workpiece 710 to be welded is provided on the fixing assembly 400, rather than being directly provided on the first electrode 220 or the second electrode 320, so as to prevent the workpiece 710 to be welded from crushing the first electrode 220 or the second electrode 320. At the same time, a fixing assembly 400 is provided, and the workpiece 710 to be welded is fixed between the first electrode 220 and the second electrode 320 by the fixing assembly 400, so that the first electrode 220 can be extended to abut against one side of the workpiece 710 to be welded, while the movable platform 310 drives the second electrode 320 to move to abut against the other side of the workpiece 710 to perform welding work on all welds at the same time.

[0071] In addition, when the electrode cap of the first electrode 220 wears and causes the first electrode 220 to become shorter, since the first electrode 220 can move telescopically, it is convenient to keep the welding pressure of all first electrodes 220 consistent, avoiding the problem of the workpiece 710 to be welded being pulled due to inconsistent welding pressure.

[0072] It should be noted that the workpiece 710 to be welded is generally a two-layer structure that needs to be welded together, such as the inner and outer body, inner and outer doors, or inner and outer chassis of an automobile. The two layers of the workpiece can be of equal or unequal size. For example, a first workpiece to be welded and a second workpiece to be welded of the same size can be stacked into two layers and welded to form the welded workpiece 720. Alternatively, multiple small workpieces can be welded onto a single large workpiece.

[0073] The frame 100 has a first side and a second side that are positioned opposite to each other. During actual welding, the first workpiece to be welded and the second workpiece to be welded are first stacked to form a workpiece to be welded 710, and then the workpiece to be welded 710 is introduced into the frame 100 from the first side of the frame 100. After welding is completed, the welded workpiece 720 is moved from the second side of the frame 100 to the outside of the frame 100.

[0074] In some embodiments, referring to FIG. 2 , the fixed platform 210 and the movable platform 310 are disposed opposite to each other in a vertical direction, and the first electrode 220 and the second electrode 320 are respectively disposed on one side of the fixed platform 210 and the movable platform 310 close to each other.

[0075] In other embodiments, the fixed platform 210 and the movable platform 310 may also be arranged horizontally relative to each other. In this case, the fixing assembly 400 may include a first frame and a second frame arranged horizontally, and the first frame and the second frame are used to clamp the workpiece 710 to be welded therebetween. Alternatively, the fixing assembly 400 may be used to suspend the workpiece 710 to be welded between the fixed platform 210 and the movable platform 310.

[0076] Specifically, in conjunction with Figure 2, the fixing assembly 400 includes a support member and a fastener. The support member includes at least two support columns 410, and the at least two support columns 410 are spaced apart and arranged on the fixing platform 210. For example, the number of support columns 410 can be four, and the four support columns 410 are respectively arranged at the four corners of the fixing platform 210 to support the workpiece 710 to be welded. When the workpiece 710 to be welded is placed on the support column 410, the fastener is used to fasten the workpiece 710 to be welded to prevent the two workpieces to be welded from slipping relative to each other during the welding process. The fastener can be a clamping mechanism provided on the fixing assembly 400, and the clamping mechanism is used to clamp and fasten the workpiece 710 to be welded.

[0077] In some embodiments, in combination with Figure 3, the first welding mechanism 200 includes a plurality of first power mechanisms 230 arranged on a fixed platform 210, and the plurality of first power mechanisms 230 are connected one-to-one with one end of the plurality of first electrodes 220 close to the fixed platform 210. The first power mechanisms 230 are respectively used to drive the corresponding first electrodes 220 to move telescopically relative to the fixed platform 210.

[0078] In this embodiment, each first electrode 220 is connected to a first power mechanism 230, meaning the extension length of each first electrode 220 can be individually controlled. During the actual welding process, the electrode cap of the electrode tip gradually wears, resulting in varying degrees of wear on each electrode cap. When welding is required, each first power mechanism 230 controls the corresponding first electrode 220 to extend to the same length outside the fixed platform 210. This ensures that all first electrodes 220 contact the workpiece 710 with the same pressure, ensuring the same force applied to the workpiece 710 and thus ensuring weld quality.

[0079] Furthermore, the second welding mechanism 300 includes a plurality of second power mechanisms 330 arranged on the movable platform 310, and the plurality of second power mechanisms 330 are connected one-to-one with the plurality of second electrodes 320 close to one end of the movable platform 310, and the second power mechanisms 330 are respectively used to drive the corresponding second electrodes 320 to telescopically move relative to the movable platform 310.

[0080] The extension length of each second electrode 320 can be individually controlled. During the actual welding process, when the electrode cap at the end of the second electrode 320 shows varying degrees of wear, the movable platform 310 can be controlled to drive the second electrode 320 to move to a preset distance from the workpiece 710 to be welded, where the preset distance is less than the total extension length of the second electrode 320. Then, the second power mechanism 330 drives the corresponding second electrodes 320 to move, so that all second electrodes 320 abut against the workpiece 710 to be welded with the same high pressure. At the same time, based on the fact that all first electrodes 220 abut against the workpiece 710 to be welded with the same low pressure, it can be ensured that the forces on all weld points are equal, thereby avoiding pulling of the workpiece 710 to be welded along the thickness direction due to unequal forces on weld points at different positions.

[0081] In addition, when the surface of the workpiece 710 to be welded is uneven or has multiple planes of different heights, since the first electrode 220 and the second electrode 320 can be telescopically movable, welding of welding points in different planes can be achieved.

[0082] The first power mechanism 230 and the second power mechanism 330 may be hydraulic cylinders, air cylinders or screw-nut mechanisms. To facilitate detection of the contact pressure between the first electrode 220 and the second electrode 320 and the workpiece 710 to be welded, pressure sensors may be provided on the first electrode 220 and the second electrode 320 .

[0083] In some embodiments, the first welding mechanism 200 includes a first locking assembly disposed on the fixed platform 210 and configured to lock the first electrode 220. The second welding mechanism 300 includes a second locking assembly disposed on the movable platform 310 and configured to lock the second electrode 320.

[0084] When the first power mechanism 230 and the second power mechanism 330 cease operation, the first electrode 220 and the second electrode 320 cease extending and retracting, effectively locking the first electrode 220 and the second electrode 320. However, this locking mechanism has a slow response speed. Furthermore, by providing a first locking assembly and a second locking assembly, once the first electrode 220 and the second electrode 320 extend and reach the desired abutment pressure, the first locking assembly and the second locking assembly are respectively used to further increase the locking speed of the first electrode 220 and the second electrode 320. The provision of the first locking assembly and the second locking assembly can further improve the locking speed of the first electrode 220 and the second electrode 320. The first locking assembly and the second locking assembly can be locking mechanisms provided on the first power mechanism 230 and the second power mechanism 330, respectively. The specific structures of the first locking assembly and the second locking assembly are conventional and will not be elaborated upon here.

[0085] In some embodiments, the first electrode 220 is movably disposed on the fixed platform 210 , and the second electrode 320 is movably disposed on the movable platform 310 .

[0086] In particular, taking the example of a first electrode 220 being movably disposed on a fixed platform 210, the fixed platform 210 is provided with multiple guide rails, each of which is provided with multiple first electrodes 220. The first electrodes 220 can be moved according to different weld point locations on different workpieces 710 to be welded, so that the multiple first electrodes 220 correspond to multiple or even all weld point locations on the workpiece 710 to be welded, thereby facilitating the use of the welding device to weld different workpieces 710 to be welded, thereby improving the applicability of the welding device. Similarly, the second electrode 320 can also adopt the movement method of the first electrode 220. Of course, the first electrode 220 and the second electrode 320 are not limited to the above-mentioned movement method, as long as the movement of the first electrode 220 and the second electrode 320 can be achieved.

[0087] In some embodiments, in combination with Figure 2, multiple first electrodes 220 are divided into first direction electrodes 221 and second direction electrodes 222 set at at least one angle to the first direction electrodes 221, and multiple second electrodes 320 are divided into third direction electrodes 321 and fourth direction electrodes 322 set at at least one angle to the third direction electrodes 321. The first direction electrodes 221 and the third direction electrodes 321 correspond one-to-one and are set relative to each other, and the second direction electrodes 222 and the fourth direction electrodes 322 correspond one-to-one and are set relative to each other.

[0088] Among them, the first direction electrode 221 and the third direction electrode 321 can be arranged along the vertical direction, and the first direction electrode 221 and the third direction electrode 321 are used to weld the main horizontal surface of the workpiece 710 to be welded. In addition, when there is an inclined surface on the workpiece 710 to be welded, for example, an inclined surface inclined at 30° to the horizontal plane, the second direction electrode 222 and the fourth direction electrode 322 are at an angle of 30° to the vertical direction, and are used to weld the welding points on the inclined surface.

[0089] Specifically, there are multiple second-direction electrodes 222, each of which can be arranged at different angles relative to the vertical direction to facilitate welding of inclined surfaces of different angles on the workpiece 710. There are also multiple corresponding fourth-direction electrodes 322, each corresponding to and opposite to the second-direction electrodes 222.

[0090] Furthermore, the second direction electrode 222 and the fourth direction electrode 322 respectively include a connecting segment and an electrode segment, and the electrode segment is rotatably connected to one end of the connecting segment. The end of the connecting segment of the second direction electrode 222 away from the electrode segment is connected to the fixed platform 210, and the end of the connecting segment of the fourth direction electrode 322 away from the electrode segment is connected to the movable platform 310.

[0091] That is, the angle between the electrode segment and the connecting segment can be adjusted, so that the electrode segment can be used to weld workpieces 710 with different shapes of surfaces (flat or uneven), and has a wide range of applicability.

[0092] In some embodiments, in conjunction with FIG1 , the welding device includes a grinding mechanism 500, which includes a first moving mechanism, a grinding platform 510 disposed on the first moving mechanism, and a plurality of grinding units 520 disposed on the grinding platform 510. The first moving mechanism is used to drive the grinding platform 510 to move between the first electrode 220 and the second electrode 320. The grinding units 520 are disposed in a one-to-one correspondence with the first electrode 220, or the grinding units 520 are disposed in a one-to-one correspondence with the second electrode 320, or the grinding units 520 are disposed in a one-to-one correspondence with both the first electrode 220 and the second electrode 320.

[0093] In actual use, when the electrode cap of the electrode end is worn, the grinding mechanism 500 is set on the fixed component 400, and the grinding unit 520 is set one-to-one corresponding to the first electrode 220, so as to realize the simultaneous grinding of multiple first electrodes 220 and / or second electrodes 320, with high grinding efficiency.

[0094] In some embodiments, referring to FIG. 4 and FIG. 5 , each grinding unit 520 includes two grinding heads 521 disposed opposite to each other on the grinding platform 510 . The two grinding heads 521 are respectively configured to simultaneously interface with the first electrode 220 and the second electrode 320 disposed opposite to each other.

[0095] Specifically, the grinding unit 520 includes a third power mechanism. The two grinding heads 521 can share the same third power mechanism. The third power mechanism can be a dual-output electrode, and the power ends of the dual-output motor are respectively connected to the two grinding heads 521. When it is necessary to grind the electrode caps on the electrode welding ends, the position of the grinding unit 520 on the grinding platform 510 is first adjusted so that it corresponds to the position of the first electrode 220. The grinding mechanism 500 is then moved between the first electrode 220 and the second electrode 320. The first electrode 220 is then extended, and the movable platform 310 drives the second electrode 320 toward the grinding head 521. When the first electrode 220 and the second electrode 320 respectively contact the two grinding heads 521, the first electrode 220 is locked, and the movable platform 310 stops moving. At this time, the third power mechanism drives the two grinding heads 521 to grind the electrode caps on the first electrode 220 and the second electrode 320 simultaneously.

[0096] In some other embodiments, each grinding unit 520 has only one grinding head 521. In actual use, the grinding head 521 of the grinding mechanism 500 can first be directed toward the first electrodes 220 to grind all the first electrodes 220. The grinding mechanism 500 can then be turned over so that the grinding head 521 is directed toward the second electrodes 320 to grind all the second electrodes 320.

[0097] In some embodiments, in combination with Figure 6, the welding device includes a cap removal mechanism 600, the cap removal mechanism 600 includes a second moving mechanism, a cap removal platform 610 arranged on the second moving mechanism, and a plurality of cap removal units arranged on the cap removal platform 610. The second moving mechanism is used to drive the cap removal platform 610 to move between the first electrode 220 and the second electrode 320. Each cap removal unit includes two cap removal heads respectively arranged on two opposite sides of the cap removal platform 610. The two cap removal heads are respectively used to simultaneously remove the caps from the oppositely arranged first electrode 220 and the second electrode 320.

[0098] Furthermore, the grinding mechanism 500 and the cap replacement mechanism 600 are respectively located on opposite sides of the frame 100. When the electrode cap is severely worn and cannot be repaired by the grinding mechanism 500, the cap can be replaced by the cap replacement mechanism 600.

[0099] Specifically, the frame 100 further has a third side and a fourth side that are opposite to each other. One of the grinding mechanism 500 and the capping mechanism 600 is located on the third side, and the other is located on the fourth side.

[0100] In this embodiment, the cap removal unit is based on prior art. Unlike prior art, each cap removal unit of the present application includes two cap removal heads, respectively disposed on opposite sides of the cap removal platform 610. The two cap removal heads are respectively used to simultaneously remove the caps from the first and second electrodes 220, 320, which are disposed opposite each other. During actual cap removal, it is only necessary to cause the second movable mechanism to move the cap removal platform 610 between the first and second electrodes 220, 320, with the cap removal units corresponding to the first electrodes 220. Then, the plurality of first electrodes 220 are moved and extended to abut against the corresponding cap removal units, and the movable platform 310 drives the plurality of second electrodes 320 to move to abut against the corresponding cap removal units. Finally, the plurality of cap removal units move simultaneously to remove the caps from the plurality of first and second electrodes 220, 320. That is, the cap removal mechanism 600 of the present application can simultaneously complete the cap removal work for all first and second electrodes 220, 320, greatly improving the efficiency of cap removal.

[0101] Further, in combination with Figure 7, the cap replacement mechanism 600 includes a plurality of cap replacement units 630 arranged on the cap replacement platform 610, and the cap replacement unit 630 includes a shell 633 and a first electrode cap 631 and a second electrode cap 632 coaxially arranged in the shell 633, the openings of the first electrode cap 631 and the second electrode cap 632 are opposite to each other, the first electrode 220 is used to extend into the first electrode cap 631 at a preset pressure, and the second electrode 320 is used to extend into the second electrode cap 632 at a preset pressure.

[0102] After the cap removal unit completes its operation, the second moving mechanism drives the cap removal and replacement platform 610 to move, and the cap replacement units 630 are arranged one-to-one with the first electrodes 220. Then, multiple first electrodes 220 move and extend, and respectively extend into the corresponding first electrode caps 631 with a preset pressure, so that the first electrode caps 631 are pressed against the first electrodes 220. Then, the movable platform 310 drives multiple second electrodes 320 to move and extend into the second electrode caps 632 with a preset pressure, so that the second electrode caps 632 are pressed against the second electrodes 320. This can quickly complete the installation of the electrode caps of all first electrodes 220 and second electrodes 320, greatly improving the efficiency of cap replacement.

[0103] The first moving mechanism and the second moving mechanism can be a moving carriage, a conveyor belt or a mechanical arm clamping mechanism. The preset pressure is a force that can press the electrode cap into the first electrode 220 or the second electrode 320 to be clamped.

[0104] An embodiment of the present application discloses a welding method using a welding device, comprising the following steps:

[0105] The workpiece 710 to be welded is placed on the fixing assembly 400;

[0106] The plurality of first electrodes 220 extend relative to the fixed platform 210 and abut against one side of the workpiece 710 to be welded with a first pressure, and then the first electrodes 220 are locked;

[0107] The movable platform 310 drives the plurality of second electrodes 320 to move toward the workpiece 710 to be welded, and abuts against the other side of the workpiece 710 to be welded with a second pressure, wherein the first pressure is less than the second pressure;

[0108] The first electrode 220 and the second electrode 320 are simultaneously started to weld the workpiece 710 .

[0109] In this embodiment, during welding, the workpiece 710 to be welded is first placed on the fixed assembly 400. The first electrode 220 is then extended and lightly abutted against the workpiece 710 with a first pressure. The first electrode 220 is then locked. The movable platform 310 then drives the plurality of second electrodes 320 toward the workpiece 710 to be welded, and abuts against the other side of the workpiece 710 with a second pressure. At this point, because the first electrode 220 is locked, that is, the first electrode 220 can provide stable support for the workpiece 710 to be welded, when the second electrode 320 abuts against the other side of the workpiece 710 with a high pressure, the workpiece 710 to be welded is protected from being pulled along the thickness direction, thereby preventing damage to the workpiece 710.

[0110] In some embodiments, the step of placing the workpiece 710 to be welded on the fixing assembly 400 includes moving the workpiece 710 to be welded from a first side of the frame 100 to the fixing assembly 400. After the step of simultaneously activating the first electrode 220 and the second electrode 320 to weld the workpiece 710 to be welded, the step further includes moving the workpiece 710 to be welded from a second side of the frame 100 to outside the welding device, with the first side and the second side being disposed opposite each other.

[0111] The rack 100 may be a rectangular, circular, or elliptical structure. Referring to FIG1 , taking the rack 100 as a rectangle as an example, the first side and the second side are located at two opposite sides of the rectangle, and the third side and the fourth side are located at the other two opposite sides of the rectangle.

[0112] In other embodiments, the first side may be adjacent to the second side, and the third side may be adjacent to the fourth side. As long as there are four positions around the frame 100, the four positions are used to place the stacked workpieces to be welded, the welded workpieces, the grinding mechanism 500, and the cap removal mechanism 600, respectively. The relative position relationship of the four positions is not limited here.

[0113] An embodiment of the present application discloses a welding method using a welding device, including a grinding step, specifically as follows:

[0114] The first moving mechanism drives the grinding platform 510 to move between the first electrode 220 and the second electrode 320, and sets the grinding units 520 in a one-to-one correspondence with the first electrode 220;

[0115] The plurality of first electrodes 220 are moved and extended to abut against the corresponding grinding units 520;

[0116] The movable platform 310 drives the plurality of second electrodes 320 to move so as to abut against the corresponding grinding units 520 ;

[0117] The grinding unit 520 grinds the plurality of first electrodes 220 and the plurality of second electrodes 320 simultaneously.

[0118] In this embodiment, the grinding method described above can complete the grinding of all first electrodes 220 and second electrodes 320 on the welding mechanism at one time, with high grinding speed and efficiency.

[0119] This application discloses a welding method using a welding device in an embodiment, including a cap removal step, which is specifically as follows:

[0120] The second moving mechanism drives the cap removal platform 610 to move between the first electrode 220 and the second electrode 320, and arranges the cap removal units in a one-to-one correspondence with the first electrode 220;

[0121] The plurality of first electrodes 220 are moved and extended to abut against the corresponding decapping units;

[0122] The movable platform 310 drives the plurality of second electrodes 320 to move so as to abut against the corresponding decapping units;

[0123] The plurality of decapping units decap the plurality of first electrodes 220 and the plurality of second electrodes 320 at the same time.

[0124] In this embodiment, the above-mentioned cap removal method can be used to remove the electrode caps at the ends of all first electrodes 220 and second electrodes 320 on the welding mechanism at one time, with high speed and efficiency.

[0125] Furthermore, the welding method further includes a pile cap step, which is as follows:

[0126] The second moving mechanism drives the cap removal and replacement platform 610 to move, and the cap replacement units 630 are arranged in a one-to-one correspondence with the first electrodes 220;

[0127] The plurality of first electrodes 220 are moved and extended, and are respectively extended into the corresponding first electrode caps 631 with a preset pressure, so that the first electrode caps 631 are pressed onto the first electrodes 220;

[0128] The movable platform 310 drives the plurality of second electrodes 320 to move and extends into the second electrode cap 632 with a preset pressure, so that the second electrode cap 632 is pressed onto the second electrode 320 .

[0129] In this embodiment, the capping method can be used to complete the installation of the electrode caps on the ends of all the first electrodes 220 and the second electrodes 320 on the welding mechanism at one time, with high capping speed and efficiency.

[0130] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0131] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A welding device, characterized in that: The welding device comprises: frame; A first welding mechanism includes a fixed platform and a plurality of first electrodes arranged on the fixed platform, wherein the fixed platform is fixed to the frame, and the first electrodes are capable of telescopic movement relative to the fixed platform; a second welding mechanism comprising a movable platform and a plurality of second electrodes disposed on the movable platform, wherein the movable platform is movably disposed on the frame, the second electrodes corresponding to and opposite to the first electrodes, and the movable platform is used to drive the second electrodes toward or away from the corresponding first electrodes; and A fixing assembly is connected to the frame or the fixing platform, and is used to fix the workpiece to be welded between the first electrode and the second electrode.

2. The welding device according to claim 1, characterized in that The fixed platform and the movable platform are arranged opposite to each other in a vertical direction, and the first electrode and the second electrode are respectively arranged on one side of the fixed platform and the movable platform close to each other.

3. The welding device according to claim 2, characterized in that The fixing assembly includes a support member and a fastener, the support member includes at least two support columns, at least two of the support columns are arranged at intervals on the fixing platform, the fastener is arranged on the fixing platform, the support column is used to support the workpiece to be welded, and the fastener is used to fasten the workpiece to be welded to the support column.

4. The welding device according to claim 1, characterized in that The first welding mechanism includes a plurality of first power mechanisms arranged on the fixed platform, and the plurality of first power mechanisms are connected one-to-one with one end of the plurality of first electrodes close to the fixed platform, and the first power mechanisms are respectively used to drive the corresponding first electrodes to move telescopically relative to the fixed platform.

5. The welding device according to claim 4, characterized in that The second welding mechanism includes multiple second power mechanisms arranged on the movable platform, and the multiple second power mechanisms are connected one-to-one with the multiple second electrodes close to one end of the movable platform. The second power mechanisms are respectively used to drive the corresponding second electrodes to move telescopically relative to the movable platform.

6. The welding device according to claim 4, characterized in that A pressure sensor is provided on the first electrode and the second electrode respectively.

7. The welding device according to claim 4, characterized in that The first welding mechanism includes a first locking assembly, the first locking assembly is arranged on the fixed platform, and the first locking assembly is used to lock the first electrode; The second welding mechanism includes a second locking assembly, the second locking assembly is arranged on the movable platform, the second The locking assembly is used to lock the second electrode.

8. The welding device according to claim 1, characterized in that The first electrode is movably disposed on the fixed platform, and the second electrode is movably disposed on the movable platform.

9. The welding device according to claim 1, characterized in that The multiple first electrodes are divided into first direction electrodes and second direction electrodes set at at least one angle to the first direction electrodes, and the multiple second electrodes are divided into third direction electrodes and fourth direction electrodes set at at least one angle to the third direction electrodes. The first direction electrodes and the third direction electrodes correspond one-to-one and are set relative to each other, and the second direction electrodes and the fourth direction electrodes correspond one-to-one and are set relative to each other.

10. The welding device according to claim 9, characterized in that The second direction electrode and the fourth direction electrode respectively include a connecting segment and an electrode segment, the electrode segment is rotatably connected to one end of the connecting segment, the connecting segment of the second direction electrode is connected to the fixed platform at one end away from the electrode segment, and the connecting segment of the fourth direction electrode is connected to the movable platform at one end away from the electrode segment.

11. The welding device according to claim 1, characterized in that The welding device includes a grinding mechanism, which includes a first moving mechanism, a grinding platform arranged on the first moving mechanism, and a plurality of grinding units arranged on the grinding platform. The first moving mechanism is used to drive the grinding platform to move between the first electrode and the second electrode. The grinding units are arranged in a one-to-one correspondence with the first electrode, or the grinding units are arranged in a one-to-one correspondence with the second electrode, or the grinding units are arranged in a one-to-one correspondence with both the first electrode and the second electrode.

12. The welding device according to claim 11, characterized in that Each of the grinding units includes two grinding heads respectively arranged on two opposite sides of the grinding platform, and the two grinding heads are respectively used to simultaneously connect with the first electrode and the second electrode respectively arranged opposite to each other.

13. The welding device according to claim 1, wherein The welding device includes a cap removal mechanism, which includes a second moving mechanism, a cap removal platform arranged on the second moving mechanism, and a plurality of cap removal units arranged on the cap removal platform. The second moving mechanism is used to drive the cap removal platform to move between the first electrode and the second electrode. Each of the cap removal units includes two cap removal heads respectively arranged on opposite sides of the cap removal platform. The two cap removal heads are respectively used to simultaneously remove the caps from the first electrode and the second electrode arranged opposite to each other.

14. The welding device according to claim 13, characterized in that The cap-changing mechanism includes a plurality of cap-changing units arranged on the cap-changing platform, and the cap-changing units include a shell and a first electrode cap and a second electrode cap coaxially arranged in the shell, the openings of the first electrode cap and the second electrode cap are opposite to each other, the first electrode is used to extend into the first electrode cap at a preset pressure, and the second electrode is used to extend into the second electrode cap at a preset pressure.

15. The welding device according to claim 14, characterized in that The grinding mechanism and the cap removal and replacement mechanism are respectively located on two opposite sides of the frame.

16. A welding method using the welding device according to any one of claims 1 to 15, characterized in that: The steps include: placing the workpiece to be welded on a fixed assembly; A plurality of first electrodes are extended relative to the fixed platform and abutted against one side of the workpiece to be welded with a first pressure, and then the first electrodes are locked; The movable platform drives the plurality of second electrodes to move toward the workpiece to be welded, and abuts against the other side of the workpiece to be welded with a second pressure, wherein the first pressure is less than the second pressure; The first electrode and the second electrode are started simultaneously to weld the workpieces to be welded.

17. The welding method of the welding device according to claim 16, further comprising the following steps: the step of placing the workpiece to be welded on the fixing assembly comprises moving the workpiece to be welded from the first side of the frame to the fixing assembly; After the step of simultaneously starting the first electrode and the second electrode to weld the workpiece to be welded, the step further includes moving the workpiece to be welded from a second side of the frame to outside the welding device, where the first side is opposite to the second side.

18. A welding method using the welding device according to claim 11 or 12, comprising the following steps: The first moving mechanism drives the grinding platform to move between the first electrode and the second electrode, and enables the grinding units to be arranged in a one-to-one correspondence with the first electrodes; The plurality of first electrodes are moved and extended to abut against the corresponding grinding units; The movable platform drives the plurality of second electrodes to move so as to abut against the corresponding grinding units; The grinding unit grinds the plurality of first electrodes and the plurality of second electrodes simultaneously.

19. A welding method using the welding device according to claim 14, comprising the following steps: The second moving mechanism drives the cap removal platform to move between the first electrode and the second electrode, and enables the cap removal units to be arranged in a one-to-one correspondence with the first electrodes; The plurality of first electrodes are moved and extended to abut against the corresponding cap removal units; The movable platform drives the plurality of second electrodes to move so as to abut against the corresponding cap removal units; The plurality of decapping units decaps the plurality of first electrodes and the plurality of second electrodes simultaneously.

20. The welding method of the welding device according to claim 19, further comprising the steps of: The second moving mechanism drives the cap removal and replacement platform to move, and the cap replacement units are arranged in a one-to-one correspondence with the first electrodes; The plurality of first electrodes are moved and extended, and are respectively extended into the corresponding first electrode caps with a preset pressure, so that the The first electrode cap is crimped onto the first electrode; The movable platform drives the plurality of second electrodes to move and extends into the second electrode cap with a preset pressure, so that the second electrode cap is pressed onto the second electrode.

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