Electric permanent magnet welding clamp for stainless steel band welding

Abstract

The utility model relates to the technical field of clamps, and provides an electro-permanent magnet welding clamp for welding a stainless steel band, which is characterized by comprising a fixed platform, a heat-conducting support plate, an electro-permanent magnet and a pressing plate, and the heat-conducting support plate is arranged on the fixed platform and used for supporting the end to be welded of the stainless steel band; the electro-permanent magnets are arranged on the fixed platform, and the electro-permanent magnets are arranged on the two sides of the heat conduction supporting plate; the pressing plate is used for being attracted above the electro-permanent magnet, and the stainless steel band is used for being clamped between the electro-permanent magnet and the pressing plate. According to the technical scheme, the problem that an electromagnet welding clamp and an air bag type welding clamp cannot well meet the welding requirement in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fixtures, and specifically, to an electro-permanent magnetic welding fixture for stainless steel strip welding. Background Art

[0002] At present, the thin plate stainless steel strip welding fixtures are divided into two types: electromagnet welding fixtures and airbag welding fixtures. The disadvantages of using electromagnet welding fixtures are as follows: The electromagnet needs to be continuously powered on to provide magnetic force, which wastes electric energy; continuous power on will cause the temperature of the electromagnet to rise, resulting in poor heat dissipation during the welding process, and angular deformation and warping deformation; there is a risk of sudden power failure in the adsorption of the electromagnet. After power failure, the electromagnet cannot adsorb and fix the steel strip, which will affect the welding quality and work efficiency. The maximum clamping force that the airbag welding fixture can provide is relatively small, and the positive pressure generated by the same contact area is insufficient, resulting in poor stability of the workpiece, easy to produce misalignment and edge biting phenomena, which will affect the welding quality. Therefore, the existing electromagnet welding fixtures and airbag welding fixtures cannot well meet the welding requirements. Content of the Utility Model

[0003] The utility model provides an electro-permanent magnetic welding fixture for stainless steel strip welding, which solves the problem that neither the electromagnet welding fixture nor the airbag welding fixture in the related technology can well meet the welding requirements.

[0004] The technical solution of the utility model is as follows: An electro-permanent magnetic welding fixture for stainless steel strip welding, which is characterized by comprising

[0005] A fixed platform,

[0006] A heat-conducting support plate, which is arranged on the fixed platform and is used to support the end to be welded of the stainless steel strip;

[0007] An electro-permanent magnet, which is arranged on the fixed platform, and there are electro-permanent magnets on both sides of the heat-conducting support plate;

[0008] A pressing plate, which is used to adsorb above the electro-permanent magnet, and the stainless steel strip is clamped between the electro-permanent magnet and the pressing plate.

[0009] It further includes a support rod, the lower end of the support rod is connected to the fixed platform, the upper end of the support rod is connected to the heat-conducting support plate, the number of the support rods is multiple, and all the support rods are arranged along the length direction of the heat-conducting support plate.

[0010] There is a heat dissipation space between the heat-conducting support plate and the electro-permanent magnet. It further includes a heat dissipation rod, which is arranged on the heat-conducting support plate and is located in the heat dissipation space.

[0011] The upper surface of the heat-conducting support plate has a positioning groove, and the end of the stainless steel strip to be welded is used to be inserted into the positioning groove.

[0012] It also includes

[0013] a guide rail, which is arranged on the pressing plate;

[0014] a sliding seat, which is slidably arranged on the guide rail;

[0015] a welding torch, which is arranged on the sliding seat, and the welding end of the welding torch is located above the heat-conducting support plate.

[0016] It also includes

[0017] a rack, which is arranged on the pressing plate, and the length direction of the rack is the same as the length direction of the guide rail;

[0018] a gear, which is rotatably arranged on the sliding seat, the axis of the gear is vertically arranged, and the gear meshes with the rack;

[0019] a rotation driving mechanism, which is arranged on the sliding seat, and the output shaft of the rotation driving mechanism is coaxially arranged and fixedly connected with the gear.

[0020] It also includes

[0021] a wire feeding disc, which is rotatably arranged on the sliding seat and is used for coiling the welding wire;

[0022] a driving wire feeding wheel, which is rotatably arranged on the sliding seat and is located between the wire feeding disc and the welding torch;

[0023] a driven wire feeding wheel, which is rotatably arranged on the sliding seat and is located between the wire feeding disc and the welding torch, and a wire feeding channel for passing the welding wire is left between the driving wire feeding wheel and the driven wire feeding wheel;

[0024] a wire feeding motor, which is arranged on the sliding seat, and the output shaft of the wire feeding motor is coaxially arranged and fixedly connected with the driving wire feeding wheel.

[0025] It also includes a wire feeding guide block, which has a receiving groove and a guiding through hole. The driving wire feeding wheel and the driven wire feeding wheel are both located in the receiving groove, and the guiding through holes are arranged on both sides of the receiving groove and are communicated with the wire feeding channel.

[0026] It also includes

[0027] A support frame, one end of the support frame is hinged to the wire feeding guide block, the other end of the support frame is located above the active wire feeding wheel, and the driven wire feeding wheel is rotatably arranged on the support frame;

[0028] A limiting plate, the wire feeding guide block is provided with a slot, the slot communicates with the accommodating groove, one end of the limiting plate is arranged on the support frame, the other end of the limiting plate is located in the slot, and the height of the slot is greater than the thickness of the limiting plate;

[0029] An adjusting rod, the adjusting rod is threadedly connected to the wire feeding guide block, the lower end of the adjusting rod contacts the upper end surface of one end of the limiting plate located in the slot, and the upper end of the adjusting rod is located above the wire feeding guide block.

[0030] The circumferential surface of the driven wire feeding wheel is provided with a limiting groove, and the depth of the limiting groove is less than the diameter of the welding wire.

[0031] The working principle and beneficial effects of the present utility model are as follows: The heat-conducting support plate is arranged on the fixed platform and is used to support the end to be welded of the stainless steel strip; The electro-permanent magnet is arranged on the fixed platform, and there are electro-permanent magnets on both sides of the heat-conducting support plate; The pressing plate is used to adsorb above the electro-permanent magnet, and the stainless steel strip is used to be clamped between the electro-permanent magnet and the pressing plate. The fixed platform serves as a basic support component for fixing the heat-conducting support plate and the electro-permanent magnet. During use, first place the stainless steel strip on the electro-permanent magnet, and make the two ends to be welded located on the heat-conducting support plate. Then place the pressing plates on the stainless steel strips on both sides of the heat-conducting support plate, weld the arc starting plates on both sides of the end to be welded of the stainless steel strip, and start the control system to magnetize the electro-permanent magnet, then the pressing plates can be adsorbed and fixed on the stainless steel strip, so that the stainless steel strip is clamped between the electro-permanent magnet and the pressing plate. After the stainless steel strip is fixed, the welding operation can be carried out to ensure that the stainless steel strip does not move during the welding process, thereby ensuring the welding quality and precision. The heat-conducting support plate has good heat conductivity, which can help dissipate heat and reduce the thermal deformation of the stainless steel strip during the welding process, thereby reducing the probability of angular deformation and warping deformation. The electro-permanent magnet has continuous and stable adsorption force, which can avoid the situation that the electromagnet cannot adsorb and fix the stainless steel strip after power failure, can improve the welding quality and work efficiency, and can well meet the welding requirements. Description of the Drawings

[0032] The following will further illustrate the above characteristics, technical features, advantages and their implementation manners of the present utility model in a clear and easy-to-understand manner in combination with the drawings in the preferred embodiments.

[0033] Figure 1 It is a structural schematic diagram of the first direction of the present utility model.

[0034] Figure 2This is a schematic structural diagram of the second direction of the present utility model.

[0035] Figure 3 This is a schematic structural diagram of the third direction of the present utility model.

[0036] Figure 4 This is a schematic structural diagram of the fourth direction of the present utility model.

[0037] Figure 5 This is a schematic structural diagram of one direction of the driven wire feeding wheel and the wire feeding guide block in the present utility model.

[0038] Figure 6 This is a schematic structural diagram of another direction of the driven wire feeding wheel and the wire feeding guide block in the present utility model.

[0039] In the figure: 1. Fixed platform, 2. Heat conduction support plate, 3. Electro-permanent magnet, 4. Pressing plate, 5. Support rod, 6. Heat dissipation rod, 7. Positioning groove, 8. Guide rail, 9. Slide seat, 10. Welding torch, 11. Rack, 12. Gear, 13. Rotation driving mechanism, 14. Wire feeding disc, 15. Driving wire feeding wheel, 16. Driven wire feeding wheel, 17. Wire feeding motor, 18. Wire feeding guide block, 19. Accommodating groove, 20. Guide through hole, 21. Support frame, 22. Limiting plate, 23. Adjusting rod, 24. Insertion slot, 25. Limiting groove. Specific embodiments

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the specific embodiments of the present utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings, and other embodiments can also be obtained.

[0041] To make the drawings concise, only the parts related to the utility model are schematically shown in each drawing, and they do not represent the actual structure of the product. In addition, to make the drawings concise and easy to understand, in some drawings, parts with the same structure or function are only schematically shown for one of them, or only one of them is marked. In this article, "one" not only means "only this one", but also can mean "more than one" situation, and "several" includes "two" and "more than two".

[0042] In this text, it should be noted that unless otherwise clearly stipulated and defined, the terms "installation", "connection", and "linkage" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] In addition, in the description of this application, the terms "first", "second", etc. are only used for differential description and cannot be understood as indicating or implying relative importance.

[0044] Example, refer to Figures 1 to 4 , which is an embodiment of the present utility model. A permanent magnet electromagnetic welding fixture for stainless steel strip welding is proposed, including a fixed platform 1, a heat-conducting support plate 2, a permanent magnet electromagnetic 3, a pressing plate 4. The heat-conducting support plate 2 is arranged on the fixed platform 1 and is used to support the end to be welded of the stainless steel strip; the permanent magnet electromagnetic 3 is arranged on the fixed platform 1, and there are permanent magnet electromagnets 3 on both sides of the heat-conducting support plate 2; the pressing plate 4 is used to adsorb above the permanent magnet electromagnetic 3, and the stainless steel strip is used to be clamped between the permanent magnet electromagnetic 3 and the pressing plate 4.

[0045] In this embodiment, the fixed platform 1 serves as a basic support component for fixing the heat-conducting support plate 2 and the electro-permanent magnet 3. The rigid fixed platform 1 can prevent the electro-permanent magnet 3 from deforming due to its own weight. The length of each electro-permanent magnet 3 is 3500 mm, the width is 80 mm, the thickness is 50 mm, and the weight is 100 kg. The electro-permanent magnet 3 is a whole structure instead of being assembled by separate blocks, so there are no assembly joints on the surface and the adsorption surface is flat. Taking the length directions of the fixed platform 1, the heat-conducting support plate 2, the electro-permanent magnet 3, and the pressing plate 4 being all arranged in the front-back direction as an example, there are two electro-permanent magnets 3, one on the left and one on the right, above the fixed platform 1, and the heat-conducting support plate 2 is located between the two electro-permanent magnets 3 on the left and right. During use, first place the stainless-steel strip on the electro-permanent magnet 3 and make the two ends to be welded located on the heat-conducting support plate 2. Then place the pressing plate 4 on the stainless-steel strip on both sides of the heat-conducting support plate 2, and weld arc-starting plates on the front and back sides of the end of the stainless-steel strip to be welded. Start the control system to magnetize the electro-permanent magnet 3, and the pressing plate 4 can be adsorbed and fixed on the stainless-steel strip, thus clamping the stainless-steel strip between the electro-permanent magnet 3 and the pressing plate 4. After the stainless-steel strip is fixed, welding operations can be carried out to ensure that the stainless-steel strip will not move during the welding process, thereby ensuring the welding quality and precision, and it is applicable to the welding of stainless-steel strips with a thickness in the range of 0.5 - 4 mm. The heat-conducting support plate 2 has good heat-conducting performance, which can help with heat dissipation, reduce the thermal deformation of the stainless-steel strip during the welding process, and thus reduce the probability of angular deformation and warping deformation. The electro-permanent magnet 3 has continuous and stable adsorption force, which can avoid the situation that the electromagnet cannot adsorb and fix the stainless-steel strip after power failure, improve the welding quality and work efficiency, and can well meet the welding requirements. Both ends of the pressing plate 4 are provided with handles for convenient lifting and placing of the pressing plate 4.

[0046] Furthermore, as Figure 1 shown, it further includes a support rod 5. The lower end of the support rod 5 is connected to the fixed platform 1, and the upper end of the support rod 5 is connected to the heat-conducting support plate 2. The number of support rods 5 is multiple, and all the support rods 5 are arranged along the length direction of the heat-conducting support plate 2. The multiple support rods 5 together play a role in supporting the heat-conducting support plate 2, which can ensure the stability of the heat-conducting support plate 2. At the same time, the support rod 5 leaves a gap between the heat-conducting support plate 2 and the fixed platform 1, which can dissipate heat and further improve the heat dissipation effect.

[0047] Furthermore, as Figure 1 shown, there is a heat dissipation space left between the heat-conducting support plate 2 and the electro-permanent magnet 3. It further includes a heat dissipation rod 6. The heat dissipation rod 6 is arranged on the heat-conducting support plate 2 and is located in the heat dissipation space. The heat dissipation rod 6 can help the heat-conducting support plate 2 dissipate heat and further improve the heat dissipation effect. A plurality of heat dissipation rods 6 are arranged on both sides of the heat-conducting support plate 2, and all the heat dissipation rods 6 on the same side of the heat-conducting support plate 2 are arranged along the length direction of the heat-conducting support plate 2.

[0048] Further, as Figure 1 shown, the upper surface of the heat-conducting support plate 2 has a positioning groove 7. The end of the stainless steel strip to be welded is used to be inserted into the positioning groove 7, which can ensure accurate positioning. The heat-conducting support plate 2 is detachably connected to the fixed platform 1. There are positioning grooves 7 on both the upper and lower surfaces of the heat-conducting support plate 2. The width of one positioning groove 7 is 8 mm and the depth is 2 mm, which can be used for welding plates with a thickness of 2.0 mm and above. The width of the other positioning groove 7 is 4 mm and the depth is 1 mm, which can be used for welding plates with a thickness of less than 2.0 mm. This enables the welding fixture to not only meet the welding requirements of general thin plates but also handle the welding requirements of ultra-thin plates.

[0049] Further, as Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, it further includes a guide rail 8, a sliding seat 9, and a welding torch 10. The guide rail 8 is arranged on the pressing plate 4; the sliding seat 9 is slidably arranged on the guide rail 8; the welding torch 10 is arranged on the sliding seat 9, and the welding end of the welding torch 10 is located above the heat-conducting support plate 2. Taking the guide rail 8 located on the pressing plate 4 on the right side as an example, when the sliding seat 9 moves back and forth along the guide rail 8, it can drive the welding torch 10 to move synchronously in the same direction, so that the welding torch 10 moves from the front end (rear end) to the rear end (front end) of the end of the stainless steel strip to be welded, completing the welding of the stainless steel strip. The operator does not need to hold the welding torch 10, which is more time-saving and labor-saving.

[0050] During welding, adjust the tungsten electrode diameter of the welding gun 10 to 3.2mm and the arc length to 1mm. First adjust the current parameter to 70A, spot weld the front and rear arc-starting plates on the stainless steel strip, check whether there is a misalignment at the docking position of the stainless steel strip, spot weld (at a distance of 2 cm) at the misaligned position, and hammer it flat to prevent displacement during welding. Then start arc welding on the arc-starting plate, adjust the welding current to 90A, the travel speed of the slide 9 to 140mm / min, start the first pass of self-melting welding, and maintain the voltage at about 10.0V during welding; after the first pass of self-melting welding is completed, adjust the slide 9 to the initial welding position, adjust the current to 120A, the travel speed of the slide 9 to 140mm / min, and the wire feeding speed to 140mm / min, and start the second pass of wire welding. During welding, the voltage is maintained at about 11.6V. After welding is completed, turn off the argon arc welding equipment and stop the argon gas flow. Before welding, the temperature on both sides of the stainless steel strip was detected by an infrared thermometer and was 15°C. After welding, the temperature on both sides of the stainless steel strip was 20~35°C. The temperature difference before and after welding was small, and the heat dissipation effect was good during welding. The permanent magnet welding fixture was disassembled, and the high point of the horizontal weld was polished with a steel paper grinding disc, and then the transverse weld was polished with P80, P120, P180, and P240 back velvet grinding discs in turn. A 175mm blade ruler was used to detect weld deformation, and an ultrasonic thickness gauge was used to detect thickness deviation. The weld deformation was 0.04mm, and the thickness loss in the polished area was 0.04mm, which greatly reduced the degree of deformation.

[0051] Furthermore, if Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it also includes a rack 11, a gear 12, and a rotary drive mechanism 13. The rack 11 is arranged on the pressure plate 4, and the length direction of the rack 11 is the same as the length direction of the guide rail 8; the gear 12 is rotatably arranged on the slide 9, the axis of the gear 12 is arranged vertically, and the gear 12 is meshed with the rack 11; the rotary drive mechanism 13 is arranged on the slide 9, and the output shaft of the rotary drive mechanism 13 is coaxially arranged and fixedly connected with the gear 12. The length direction of the rack 11 is arranged along the front-back direction, the rack 11 is located on the right side of the guide rail 8, and the gear 12 is located on the right side of the rack 11. The rotary drive mechanism 13 is used to drive the gear 12 to rotate, so that the gear 12 moves forward or backward along the rack 11, thereby driving the slide 9 to move synchronously and in the same direction along the guide rail 8, and the mechanized operation is more time-saving and labor-saving. The rack 11 and the guide rail 8 are located on the same pressure plate 4, so that the two pressure plates 4 do not affect each other when lifting and placing.

[0052] Furthermore, if Figure 1 , Figure 2 , Figure 3 and Figure 4As shown in the figure, it further includes a wire feeding reel 14, a driving wire feeding wheel 15, a driven wire feeding wheel 16, and a wire feeding motor 17. The wire feeding reel 14 is rotatably arranged on the sliding seat 9 for coiling welding wire. The driving wire feeding wheel 15 is rotatably arranged on the sliding seat 9 and is located between the wire feeding reel 14 and the welding torch 10. The driven wire feeding wheel 16 is rotatably arranged on the sliding seat 9 and is also located between the wire feeding reel 14 and the welding torch 10. There is a wire feeding channel for the welding wire to pass through between the driving wire feeding wheel 15 and the driven wire feeding wheel 16. The wire feeding motor 17 is arranged on the sliding seat 9, and the output shaft of the wire feeding motor 17 is coaxially arranged and fixedly connected with the driving wire feeding wheel 15. The wire feeding reel 14 is located on the right side of the sliding seat 9, and the driving wire feeding wheel 15, the driven wire feeding wheel 16, and the wire feeding motor 17 are all located above the sliding seat 9. The driving wire feeding wheel 15 is located below the driven wire feeding wheel 16, and their axes are arranged in the front-rear direction. The welding wire on the wire feeding reel 14 passes through the wire feeding channel between the driving wire feeding wheel 15 and the driven wire feeding wheel 16 from right to left and then reaches the welding torch 10. The wire feeding motor 17 is used to drive the driving wire feeding wheel 15 to rotate. Through the frictional force between the driving wire feeding wheel 15, the welding wire, and the driven wire feeding wheel 16, the welding wire is effectively grasped and pushed, so that the welding wire located in the wire feeding channel moves towards the welding torch 10, and the wire feeding reel 14 rotates accordingly, thereby realizing the automatic feeding of the welding wire, mechanized operation, which is more time-saving and labor-saving.

[0053] Further, as shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , it further includes a wire feeding guide block 18. The wire feeding guide block 18 has a receiving groove 19 and a guiding through hole 20. Both the driving wire feeding wheel 15 and the driven wire feeding wheel 16 are located in the receiving groove 19. There are guiding through holes 20 on both sides of the receiving groove 19, and the guiding through holes 20 are all communicated with the wire feeding channel. The two left and right guiding through holes 20 on the wire feeding guide block 18 can play a role of guiding and limiting, so that the welding wire can smoothly enter and exit the wire feeding channel.

[0054] Further, as shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown in the figure, it further includes a support frame 21, a limit plate 22, and an adjusting rod 23. One end of the support frame 21 is hinged to the wire feeding guide block 18, and the other end of the support frame 21 is located above the active wire feeding wheel 15. The driven wire feeding wheel 16 is rotatably arranged on the support frame 21. The wire feeding guide block 18 has a slot 24, and the slot 24 communicates with the receiving groove 19. One end of the limit plate 22 is arranged on the support frame 21, and the other end of the limit plate 22 is located in the slot 24. The height of the slot 24 is greater than the thickness of the limit plate 22. The adjusting rod 23 is threadedly connected to the wire feeding guide block 18. The lower end of the adjusting rod 23 contacts the upper end surface of the end of the limit plate 22 located in the slot 24, and the upper end of the adjusting rod 23 is located above the wire feeding guide block 18. Taking the right end of the support frame 21 being hinged to the wire feeding guide block 18 and the limit plate 22 being located on the left side of the support frame 21 as an example, the slot 24 is located on the left side of the receiving groove 19 and communicates with the receiving groove 19. The right end of the limit plate 22 is connected to the left end of the support frame 21. The left end of the limit plate 22 is located in the slot 24, and the upper end surface of the left end of the limit plate 22 contacts the lower end surface of the adjusting rod 23. The support frame 21 is used to support the driven wire feeding wheel 16 to ensure its stability. The cooperation of the limit plate 22 and the adjusting rod 23 can adjust the up and down position of the driven wire feeding wheel 16 to ensure that the welding wire can be stably fed.

[0055] Furthermore, as shown in Figure 5 and Figure 6 the figure, the circumferential surface of the driven wire feeding wheel 16 has a limit groove 25, and the depth of the limit groove 25 is less than the diameter of the welding wire. The limit groove 25 is coaxially arranged with the driven wire feeding wheel 16 and is used to limit the position of the welding wire, which can ensure that the welding wire will not slip off between the active wire feeding wheel 15 and the driven wire feeding wheel 16.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. An electro-permanent magnetic welding fixture for stainless steel strip welding, characterized in that: including a fixed platform (1) a heat-conducting support plate (2) which is arranged on the fixed platform (1) and is used for supporting the end to be welded of the stainless steel strip an electro-permanent magnet (3) which is arranged on the fixed platform (1), and the electro-permanent magnet (3) is on both sides of the heat-conducting support plate (2) a pressing plate (4) which is used for adsorbing above the electro-permanent magnet (3), and the stainless steel strip is clamped between the electro-permanent magnet (3) and the pressing plate (4) 2. The electro-permanent magnetic welding fixture for stainless steel strip welding according to claim 1, characterized in that: It further includes a support rod (5), the lower end of the support rod (5) is connected with the fixed platform (1), the upper end of the support rod (5) is connected with the heat-conducting support plate (2), the number of the support rods (5) is multiple, and all the support rods (5) are arranged along the length direction of the heat-conducting support plate (2) 3. The electro-permanent magnetic welding fixture for stainless steel strip welding according to claim 2, wherein: A heat dissipation space is left between the heat-conducting support plate (2) and the electro-permanent magnet (3), and it further includes a heat dissipation rod (6) which is arranged on the heat-conducting support plate (2) and is located in the heat dissipation space 4. The electro-permanent magnetic welding fixture for stainless steel strip welding according to claim 1, characterized in that: The upper surface of the heat-conducting support plate (2) has a positioning groove (7), and the end to be welded of the stainless steel strip is inserted into the positioning groove (7) 5. A permanent magnetic welding fixture for stainless steel strip welding according to claim 1, characterized in that: including a guide rail (8) which is arranged on the pressing plate (4) a sliding seat (9) which is slidably arranged on the guide rail (8) a welding torch (10) which is arranged on the sliding seat (9), and the welding end of the welding torch (10) is located above the heat-conducting support plate (2) 6. The electro-permanent magnetic welding fixture for stainless steel strip welding according to claim 5, wherein: including a rack (11) which is arranged on the pressing plate (4), and the length direction of the rack (11) is the same as the length direction of the guide rail (8) a gear (12) which is rotatably arranged on the sliding seat (9), the axis of the gear (12) is vertically arranged, and the gear (12) meshes with the rack (11) a rotation driving mechanism (13) which is arranged on the sliding seat (9), and the output shaft of the rotation driving mechanism (13) is coaxially arranged and fixedly connected with the gear (12) 7. The electro-permanent magnetic welding fixture for stainless steel strip welding according to claim 5, characterized in that: including a wire feeding disc (14) which is rotatably arranged on the sliding seat (9) and is used for coiling the welding wire a driving wire feeding wheel (15) which is rotatably arranged on the sliding seat (9) and is located between the wire feeding disc (14) and the welding torch (10) a driven wire feeding wheel (16) which is rotatably arranged on the sliding seat (9) and is located between the wire feeding disc (14) and the welding torch (10), and a wire feeding channel for passing through the welding wire is left between the driving wire feeding wheel (15) and the driven wire feeding wheel (16) a wire feeding motor (17) which is arranged on the sliding seat (9), and the output shaft of the wire feeding motor (17) is coaxially arranged and fixedly connected with the driving wire feeding wheel (15) 8. A permanent electromagnetic welding fixture for stainless steel strip welding according to claim 7, characterized in that: It further includes a wire feeding guide block (18). A receiving groove (19) and a guiding through hole (20) are formed in the wire feeding guide block (18). The active wire feeding wheel (15) and the driven wire feeding wheel (16) are both located in the receiving groove (19). The guiding through holes (20) are formed on both sides of the receiving groove (19), and the guiding through holes (20) are communicated with the wire feeding channel.

9. The electro-permanent magnetic welding fixture for stainless steel strip welding according to claim 8, wherein: It further includes a support frame (21). One end of the support frame (21) is hinged to the wire feeding guide block (18), the other end of the support frame (21) is located above the active wire feeding wheel (15), and the driven wire feeding wheel (16) is rotatably arranged on the support frame (21); a limiting plate (22). A slot (24) is formed in the wire feeding guide block (18), and the slot (24) is communicated with the receiving groove (19). One end of the limiting plate (22) is arranged on the support frame (21), the other end of the limiting plate (22) is located in the slot (24), and the height of the slot (24) is greater than the thickness of the limiting plate (22); an adjusting rod (23). The adjusting rod (23) is threadedly connected to the wire feeding guide block (18). The lower end of the adjusting rod (23) contacts the upper end surface of one end of the limiting plate (22) located in the slot (24), and the upper end of the adjusting rod (23) is located above the wire feeding guide block (18).

10. The electro-permanent magnetic welding fixture for stainless steel strip welding according to claim 7, characterized in that: A limiting groove (25) is formed on the circumferential surface of the driven wire feeding wheel (16), and the depth of the limiting groove (25) is less than the diameter of the welding wire.

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