Solder strip shaping device
The welding strip shaping device, which connects the guide post and the pressure block in a floating manner, solves the problem of uneven welding strip flattening quality and achieves uniformity of welding strip thickness and adaptability to small-pitch grid lines.
Patent Information
- Application Number
- CN202423264920.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing strip flattening devices suffer from inconsistent strip flattening quality due to component and assembly errors.
The structure adopts a floating connection between the guide column and the pressure block. The uniformity of the welding strip thickness is achieved by the extrusion between the guide column and the pressure block. Combined with cylinder drive and cam mechanism, the flattening process is precisely controlled.
It achieves uniform thickness after the solder strip is flattened, controlling it within the range of 0.1mm to 0.12mm, to meet the spatial arrangement requirements of small-pitch grid lines.
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Figure CN223571705U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to photovoltaic module production equipment technical field especially relates to a welding band shaping device. BACKGROUND
[0002] Solar cell in the process of preparation, including solar cell welding process welding band pretreatment section. In the solar cell welding production process, the welding band is generally required to connect the battery piece in series. At present, the cross section of the welding band commonly used is mostly circular, and some are triangular or other shapes. In the process of laminating the assembly, the welding band thickness between adjacent cells is too large, which causes the cell to crack, so in the process of connecting the battery piece in series, the length of the welding band between two adjacent battery pieces needs to be flattened.
[0003] The existing welding band flattening device generally adopts mechanical flattening. Specifically, the welding band is passed through the bearing table, and the pressure head is pressed to flatten the welding band. In actual production, due to part error, assembly error and other reasons, the pressure head and the bearing table may not be parallel in the flattening process, resulting in uneven welding band flattening quality. SUMMARY
[0004] One object of the first aspect of the utility model is to provide a welding band shaping device to solve the problem of uneven welding band flattening quality in the prior art.
[0005] In particular, the utility model provides a welding band shaping device, which comprises at least one driving assembly and at least one pressure head assembly moving under the driving of each driving assembly. Each pressure head assembly comprises:
[0006] a guide column, one end of which is floatingly connected with the driving assembly and reciprocally moves along a first preset direction under the driving of the driving assembly; wherein the first preset direction is the axial direction of the guide column;
[0007] a pressing block, one side of which is floatingly connected with the other end of the guide column and reciprocally moves along the first preset direction with the guide column; and
[0008] a pad block, which is arranged on the other side of the pressing block to shape the welding band by mutual extrusion of the pressing block and the pad block when the pressing block moves close to the pad block.
[0009] Optionally, each driving assembly comprises:
[0010] a driving block, which is controlled to reciprocally move along a second preset direction, and the driving block has an inclined surface on the side close to the pressure head assembly; wherein the second preset direction is perpendicular to the first preset direction;
[0011] A first cam, the surface of which contacts one side of the drive block having the inclined surface, rotates when the drive block reciprocates in the second preset direction, and the axis of the first cam moves up and down under the action of the inclined surface; and
[0012] A first mounting base has a mounting position for mounting the first cam, and the first mounting base is rotatably connected to at least one of the guide posts.
[0013] Optionally, each of the first mounting seats is provided with at least one waist-shaped hole extending along a third preset direction, and each of the guide posts is provided with a first through hole. The first mounting seat and the guide post are rotatably connected by a pin passing through the waist-shaped hole and the first through hole, so that the first mounting seat can move relative to the guide post along the third preset direction; wherein, the third preset direction is perpendicular to the first preset direction and the third preset direction is perpendicular to the second preset direction.
[0014] Optionally, each of the driving components further includes:
[0015] A second cam, which contacts a side of the drive block opposite to the inclined surface, rotates when the drive block moves in the second preset direction; and
[0016] The second mounting base is used to mount the second cam.
[0017] Optionally, each of the drive components further includes a cylinder, each of the cylinders being connected to one of the drive blocks to drive the drive block to reciprocate in the second preset direction.
[0018] Optionally, it also includes a third mounting base, the plane of which is perpendicular to the second preset direction, and the third mounting base is provided with a second through hole extending along the second preset direction for the drive block to pass through; the cylinders are distributed on both sides of the third mounting base in the second preset direction.
[0019] Optionally, it also includes a fourth mounting base, the plane of which is perpendicular to the first preset direction, the fourth mounting base being provided with a third through hole extending along the first preset direction, the third through hole cooperating with the guide post, so that the guide post moves along the first preset direction at the third through hole.
[0020] Optionally, a reset element is also included, disposed between the fourth mounting base and the first mounting base, for resetting the first mounting base and the pressure block.
[0021] Optionally, it also includes:
[0022] A support frame is arranged to support the second mounting seat, the third mounting seat and the fourth mounting seat.
[0023] A base is arranged to support the support frame through quick release pins, and a receiving groove is arranged on the base to receive the cushion block.
[0024] Optionally, a wire passing groove plate is arranged on the base at a position on one side of the receiving groove, and a cover plate is arranged on the wire passing groove plate, and a groove is arranged on the wire passing groove plate to arrange the solder strip.
[0025] A limiting column is arranged on the base at a position on the other side of the receiving groove to clamp and limit the solder strip.
[0026] The solder strip shaping device can include a driving assembly and a pressure head assembly moving under the driving of the driving assembly, and the pressure head assembly can include a guide column, a pressure block and a cushion block, and the guide column is floatingly connected with the pressure block, and the guide column is also floatingly connected with the driving assembly. When the solder strip is arranged between the pressure block and the cushion block, the uniformity of the thickness of the solder strip between the pressure block and the cushion block can be realized in the process of flattening and shaping the solder strip by the pressure block moving close to the cushion block, and the thickness of the flattened solder strip is controlled within a certain range.
[0027] The solder strip shaping device can include a third mounting seat, a second through hole is arranged on the third mounting seat to pass the driving block, and a gas cylinder can be arranged on the third mounting seat, and the gas cylinders can be distributed on both sides of the third mounting seat and arranged alternately. In this way, the solder strip shaping device can be more compact, and is beneficial to the shaping requirement of multiple grid lines.
[0028] The above and other objects, advantages and features of the present application will become more apparent from the following detailed description of some embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS
[0029] Some specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar components or parts. It should be understood by those skilled in the art that the drawings are not necessarily drawn to scale. In the drawings:
[0030] Figure 1 is a schematic structural view of a solder strip shaping device according to one specific embodiment of the present application from one angle;
[0031] Figure 2 is a schematic structural view of a solder strip shaping device according to one specific embodiment of the present application from another angle;
[0032] Figure 3 is a partial schematic structural view of a welding strip shaping device according to one specific embodiment of the present application;
[0033] Figure 4 is a partial schematic structural view of a welding strip shaping device according to one specific embodiment of the present application;
[0034] Figure 5 is a partial schematic structural view of a driving assembly and a pressure head assembly according to one specific embodiment of the present application;
[0035] Figure 6 is a schematic structural view of a pressure head according to one specific embodiment of the present application;
[0036] Figure 7 is a schematic structural view of a driving block according to one specific embodiment of the present application;
[0037] Figure 8 is a schematic structural view of a first mounting seat according to one specific embodiment of the present application;
[0038] Figure 9 is a schematic structural view of a guide column according to one specific embodiment of the present application;
[0039] Figure 10 is a partial schematic structural view of a base according to one specific embodiment of the present application.
[0040] BRIEF DESCRIPTION OF THE DRAWINGS
[0041] welding strip shaping device - 100; driving assembly - 200; driving block - 210; inclined surface - 211; first cam - 220; first mounting seat - 230; mounting position - 231; waist-shaped hole - 232; second cam - 240; second mounting seat - 250; air cylinder - 260; pressure head assembly - 300; guide column - 310; first through hole - 311; pressure block - 320; boss - 321; cushion block - 330; pin - 400; third mounting seat - 500; second through hole - 510; fourth mounting seat - 600; third through hole - 610; reset member - 700; support frame - 800; base - 900; accommodating groove - 910; wire passing groove plate - 920; groove - 921; cover plate - 930; limiting column - 940; quick release plug pin - 110. DETAILED DESCRIPTION
[0042] In the description of the present embodiment, it needs to be understood that the terms "length", "width", "height", "upper", "lower", "left", "right", "vertical", "horizontal", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present utility model.
[0043] As a specific embodiment of the present utility model, as shown in Figures 1-5 The welding strip shaping device 100 can include at least one driving assembly 200 and at least one pressure head assembly 300 that moves under the driving of each driving assembly 200. Each pressure head assembly 300 can include a guide column 310, a pressing block 320 and a cushion block 330. The one end of the guide column 310 is floatingly connected with the driving assembly 200 and reciprocates along a first preset direction under the driving of the driving assembly 200. The first preset direction is the axial direction of the guide column 310. The pressing block 320 is floatingly connected with the other end of the guide column 310 and reciprocates in the first preset direction with the guide column 310. The cushion block 330 is arranged on the side of the pressing block 320 opposite to the guide column 310, so that when the pressing block 320 moves close to the cushion block 330, the welding strip is shaped by the mutual extrusion of the pressing block 320 and the cushion block 330.
[0044] Specifically, the welding strip shaping device 100 of the present embodiment can include a driving assembly 200 and a pressure head assembly 300 that moves under the driving of the driving assembly 200, and the pressure head assembly 300 can further include a guide column 310, a pressing block 320 and a cushion block 330. The guide column 310 is floatingly connected with the pressing block 320, and the guide column 310 is also floatingly connected with the driving assembly 200. When the welding strip is arranged between the pressing block 320 and the cushion block 330, and the welding strip is flattened and shaped by the pressing block 320 moving close to the cushion block 330, because the guide column 310 is floatingly connected with the driving assembly 200 and the pressing block 320, the thickness uniformity of the welding strip between the pressing block 320 and the cushion block 330 can be achieved, and the thickness of the flattened welding strip can be controlled within a certain range, such as 0.1mm-0.12mm according to the current standard.
[0045] Specifically, the bottom of the pressing block 320 of the present embodiment can be provided with a boss 321 (as shown in Figure 6 The thickness of the boss 321 determines the thickness size of the flattened welding strip. The thickness of the boss 321 can be designed according to actual needs. When welding strips with different thicknesses are needed, the pressing block 320 with a boss 321 of different thickness can be replaced.
[0046] Specifically, a plurality of driving assemblies 200 can be arranged in the embodiment, each of the driving assemblies 200 can drive one or a plurality of pressing head assemblies 300 to move, and each of the pressing head assemblies 300 can flatten and shape one or a plurality of solder strips. The number of the driving assemblies 200, the pressing head assemblies 300 and the solder strips can be designed according to actual conditions. For example, in one of the embodiments, the driving assemblies 200 in the embodiment can include six, each of the driving assemblies 200 can drive two pressing head assemblies 300 to move, and each of the pressing head assemblies 300 can shape two solder strips. Compared with the prior art in which one pressing head can only press one solder strip, the arrangement mode of the embodiment is beneficial to the spatial arrangement of small-pitch grid lines.
[0047] As a specific embodiment of the utility model, as shown in Figure 5 and Figure 7 each of the driving assemblies 200 in the embodiment can include a driving block 210, a first cam 220 and a first mounting seat 230. The driving block 210 is controlled to reciprocate along a second preset direction, and the side of the driving block 210 close to the pressing head assembly 300 has an inclined surface 211. The second preset direction is perpendicular to the first preset direction. The surface of the first cam 220 is in contact with the side of the driving block 210 having the inclined surface 211, so as to rotate when the driving block 210 reciprocates along the second preset direction, and the first cam 220 moves up and down around the axis under the action of the inclined surface 211. The first mounting seat 230 is provided with a mounting position 231 for mounting the first cam 220, and the first mounting seat 230 is rotationally connected with at least one guide column 310.
[0048] As a specific embodiment, the first preset direction in the embodiment can be a vertical direction, and the second preset direction can be a horizontal direction. Of course, the directions are only the directions in the drawings for the convenience of description, and are not limited to the directions of the actual structure.
[0049] Specifically, each of the driving assemblies 200 in the embodiment can include the driving block 210, the first cam 220 and the first mounting seat 230 arranged in sequence from top to bottom, wherein the first cam 220 is mounted at the mounting position 231 of the first mounting seat 230, the bottom surface of the driving block 210 is in contact with the first cam 220, and the first cam 220 can rotate relative to the central axis.
[0050] The lower side of the driving block 210 can be designed as the inclined surface 211. When the driving block 210 is controlled to move in the horizontal direction, the inclined surface 211 of the driving block 210 can push the first cam 220 to rotate, and at the same time, the first cam 220 is also pushed to move up and down, the first mounting seat 230 is further driven by the first cam 220 to move up and down, and the guide column 310 is further driven by the first mounting seat 230 to move up and down.
[0051] As a specific embodiment of the utility model, as shown in Figure 8 and Figure 9 Each first mounting seat 230 of the embodiment is provided with at least one waist-shaped hole 232 extending along a third preset direction, and each guide column 310 is provided with a first through hole 311, and the first mounting seat 230 and the guide column 310 are rotationally connected by a pin passing through the waist-shaped hole 232 and the first through hole 311, so that the first mounting seat 230 can move along the third preset direction relative to the guide column 310;Wherein, the third preset direction is perpendicular to the first preset direction, and the third preset direction is perpendicular to the second preset direction.
[0052] Specifically, the third preset direction of the embodiment is in the horizontal plane, and the third preset direction is the direction of the axis of the first cam 220.
[0053] Because the first mounting seat 230 of the embodiment is provided with at least one waist-shaped hole 232 extending along the third preset direction, and the guide column 310 and the first mounting seat 230 are rotationally connected by the pin 400 passing through the waist-shaped hole 232 and the first through hole 311 of the guide column 310, the first mounting seat 230 can rotate relative to the guide column 310 and translate in the third preset direction during the driving of the first cam 220 and the first mounting seat 230 to move up and down, so that the structural error can be eliminated, and the uniformity of the solder strip size can be ensured.
[0054] As a specific embodiment of the utility model, each drive assembly 200 of the embodiment can further include a second cam 240 and a second mounting seat 250. Wherein, the second cam 240 is in contact with the side of the drive block 210 opposite to the inclined surface 211, so as to rotate when the drive block 210 moves in the second preset direction. The second mounting seat 250 is used for mounting the second cam 240.
[0055] Specifically, the second mounting seat 250 in the embodiment is fixedly arranged, the second cam 240 is arranged on the second mounting seat 250, the second cam 240 can rotate relative to the second mounting seat 250, and the second cam 240 is in contact with the upper side of the corresponding drive block 210. When the drive block 210 moves in the second preset direction, the second cam 240 can rotate, ensuring the smooth movement of the drive block 210.
[0056] Specifically, the second mounting seat 250 of the embodiment can be designed separately, or the second mounting seats 250 of a plurality of drive assemblies 200 can be formed into an integrated structure.
[0057] As a specific embodiment of the utility model, each drive assembly 200 of the embodiment can also include a cylinder 260, and each cylinder 260 is connected with one of the drive blocks 210 to drive the drive block 210 to reciprocate in the second preset direction.
[0058] Specifically, the drive assembly 200 of the embodiment can also include a cylinder 260, and the drive block 210 is driven to move horizontally in the second preset direction by the cylinder 260. The cylinder 260 can also be replaced by other mechanisms capable of driving the drive block 210 to move linearly and reciprocally.
[0059] As a specific embodiment of the utility model, as shown in Figures 1-4 The welding strip shaping device 100 of the embodiment can also include a third mounting seat 500, and the plane of the third mounting seat 500 is perpendicular to the second preset direction. The third mounting seat 500 is provided with a second through hole 510 penetrating along the second preset direction to allow the drive block 210 to pass through. The cylinders 260 are distributed on both sides of the third mounting seat 500 in the second preset direction.
[0060] Specifically, the welding strip shaping device 100 of the embodiment can include a third mounting seat 500, and the third mounting seat 500 is provided with a second through hole 510 to allow the drive block 210 to pass through. The third mounting seat 500 can also be installed with cylinders 260, and the cylinders 260 can be distributed on both sides of the third mounting seat 500 and arranged alternately. In this way, the welding strip shaping device 100 can be more compact, which is beneficial to the shaping needs of multiple grid lines.
[0061] As a specific embodiment of the utility model, as shown in Figures 1-4 The welding strip shaping device 100 of the embodiment can also include a fourth mounting seat 600, and the plane of the fourth mounting seat 600 is perpendicular to the first preset direction. The fourth mounting seat 600 is provided with a third through hole 610 penetrating along the first preset direction. The third through hole 610 cooperates with the guide column 310 to allow the guide column 310 to move along the first preset direction at the third through hole 610.
[0062] Specifically, the fourth mounting seat 600 of the embodiment can be formed in an integral structure with the third mounting seat 500, or can be a separate structure. The fourth mounting seat 600 is fixed and immovable. The third through hole 610 on the fourth mounting seat 600 cooperates with the size and structure of the guide column 310 to ensure that the guide column 310 can move along the first preset direction under the guidance of the third through hole 610.
[0063] As a specific embodiment of the utility model, as shown in Figure 4 and Figure 5As shown, the welding strip shaping device 100 of the embodiment can further comprise a reset member 700, which is arranged between the fourth mounting seat 600 and the first mounting seat 230, and is used for resetting the first mounting seat 230 and the pressing block 320.
[0064] Specifically, the reset member 700 of the embodiment can be a spring, which is arranged between the first mounting seat 230 and the fourth mounting seat 600, and is always in a compressed state. When the inclined surface 211 of the driving block 210 pushes the first cam 220 and the first mounting seat 230 to move downward under the action of the driving block 210, the guide column 310 and the pressing block 320 also move downward, and when the driving block 210 is reset, the first mounting seat 230 moves upward under the action of the spring, and the first cam 220, the guide column 310 and the pressing block 320 also move upward to reset correspondingly.
[0065] As a specific embodiment of the utility model, as shown in Figures 1-4 and Figure 10 As shown, the welding strip shaping device 100 of the embodiment can further comprise a support frame 800 and a base 900. The support frame 800 is used for supporting the second mounting seat 250, the third mounting seat 500 and the fourth mounting seat 600. The base 900 is connected with the support frame 800 through the quick release pin 110, and is used for supporting the support frame 800. The base 900 is also provided with a containing groove 910, which is used for containing the pad 330. The base 900 is provided with a wire passing groove plate 920 and a cover plate 930 covering the wire passing groove plate 920 at a position on one side of the containing groove 910, and the wire passing groove plate 920 is provided with a groove 921, which is used for arranging the welding strip. The base 900 is provided with a limiting column 940 at a position on the other side of the containing groove 910, which is used for clamping and limiting the welding strip.
[0066] Specifically, as shown in Figures 1-10 The structure and action principle of the welding strip shaping device 100 of the embodiment are as follows:
[0067] The welding strip shaping device 100 of the embodiment can include a base 900, a support frame 800 arranged above the base 900, and six second mounting seats 250 integrally arranged above the support frame 800. Six second cams 240 are arranged at the six second mounting seats 250. A third mounting seat 500 is further arranged at the support frame 800, and six second through holes 510 are arranged at the third mounting seat 500. A driving block 210 is arranged at each through hole, and six cylinders 260 are alternately arranged at two sides of the third mounting seat 500 and drive the corresponding driving blocks 210 to move in the horizontal direction. Six first cams 220 are arranged below the driving blocks 210, and six first mounting seats 230 are arranged below the first cams 220. Two guide columns 310 are rotatably connected below each first mounting seat 230, and a pressing block 320 is rotatably connected below each guide column 310. A boss 321 is arranged below the pressing block 320.
[0068] A containing groove 910 is arranged at the base 900, and a cushion block 330 is arranged in the containing groove 910. Each cushion block 330 is arranged corresponding to one pressing block 320. A wire passing groove plate 920 and a cover plate 930 are arranged at one side of the containing groove 910, and a limiting column 940 is arranged at the other side of the containing groove 910.
[0069] When the welding strip needs to be shaped, the welding strip is arranged at the groove 921 of the wire passing groove plate 920, and is pressed by the cover plate 930. The other end of the welding strip is arranged between the gap between the limiting column 940 after passing through the pressing block 320 and the cushion block 330, and is limited and tensioned. Then, the cylinder 260 is started to drive the driving block 210 to drive the first cam 220, the first mounting seat 230, the guide column 310, and the pressing block 320 to be pressed downward, so as to flatten the welding strip. After completion, the cylinder 260 drives the driving block 210 to reset, and the first cam 220, the first mounting seat 230, the guide column 310, and the pressing block 320 are also reset under the action of the spring, and the welding strip is released.
[0070] At this point, those skilled in the art should recognize that, although the present application has been shown and described in detail in the above embodiments, many other variations or modifications can be determined or deduced directly according to the disclosure of the present application without departing from the spirit and scope of the present application. Therefore, the scope of the present application should be understood and recognized as covering all these other variations or modifications.
Claims
1. A solder strip shaping device characterized by, The device comprises at least one driving assembly and at least one pressing head assembly moving under the driving of each driving assembly, each pressing head assembly comprising: a guide column, one end of which is floatingly connected with the driving assembly and reciprocally moves along a first preset direction under the driving of the driving assembly; wherein the first preset direction is the axial direction of the guide column; a pressing block, one side of which is floatingly connected with the other end of the guide column and reciprocally moves along the first preset direction with the guide column; and a pad block, which is arranged on the other side of the pressing block, so that the pad block and the pressing block are extruded against each other when the pressing block moves close to the pad block, thereby reshaping the solder strip.
2. The device according to claim 1, wherein each driving assembly comprises: a driving block, which is controlled to reciprocally move along a second preset direction, the driving block having an inclined surface on the side close to the pressing head assembly; wherein the second preset direction is perpendicular to the first preset direction; a first cam, the surface of which is in contact with the side of the driving block having the inclined surface, so that the first cam rotates when the driving block reciprocally moves along the second preset direction, and the axial center of the first cam moves up and down under the action of the inclined surface; and a first mounting seat, on which a mounting position is arranged for mounting the first cam, the first mounting seat being rotationally connected with at least one guide column.
3. The device according to claim 2, wherein each first mounting seat is provided with at least one waist-shaped hole extending along a third preset direction, each guide column is provided with a first through hole, and the first mounting seat and the guide column are rotationally connected by a pin passing through the waist-shaped hole and the first through hole, so that the first mounting seat can move along the third preset direction relative to the guide column; wherein the third preset direction is perpendicular to the first preset direction, and the third preset direction is perpendicular to the second preset direction.
4. The device according to claim 2, wherein each driving assembly further comprises: a second cam, which is in contact with the side of the driving block opposite to the inclined surface, so that the second cam rotates when the driving block moves along the second preset direction; and a second mounting seat, which is used for mounting the second cam.
5. The device according to claim 4, wherein each driving assembly further comprises a gas cylinder, each gas cylinder being connected with one of the driving blocks to drive the driving block to reciprocally move along the second preset direction.
6. The device according to claim 5, further comprising a third mounting seat, the plane of the third mounting seat being perpendicular to the second preset direction, the third mounting seat being provided with a second through hole extending along the second preset direction for the driving block to pass through; and the gas cylinders are distributed on both sides of the third mounting seat in the second preset direction.
7. The device according to claim 6, wherein The fourth mounting base is arranged perpendicularly to the first preset direction, and is provided with a third through hole penetrating along the first preset direction. The third through hole is matched with the guide column, so that the guide column moves along the first preset direction at the third through hole.
8. The welding strip shaping device according to claim 7, characterized in that, The reset member is arranged between the fourth mounting base and the first mounting base, and is used for resetting the first mounting base and the pressing block.
9. The welding strip shaping device according to claim 7, characterized in that, Further comprising: a support frame for supporting the second mounting base, the third mounting base and the fourth mounting base; a base connected with the support frame through a quick release pin, and used for supporting the support frame; the base is further provided with a containing groove for containing the pad.
10. The welding strip shaping device according to claim 9, characterized in that, the base is provided with a wire passing groove plate and a cover plate covering the wire passing groove plate at a position on one side of the containing groove; the wire passing groove plate is provided with a groove for arranging the welding strip; the base is provided with a limiting column at a position on the other side of the containing groove, and used for clamping and limiting the welding strip.