Spot welding device for metal sheet and multi-strand wire

Abstract

The utility model relates to a spot welding device for a metal sheet and a multi-strand wire, which is used for realizing spot welding of the metal sheet, the multi-strand wire and a transition sheet, and comprises a machine table and a spot welding mechanism arranged on the machine table, the spot welding tool is used for placing and moving the metal sheet, the multi-strand wire and the transition sheet and comprises a first positioning and conveying assembly and a second positioning and conveying assembly; and the spot welding machine is positioned at the spot welding station and comprises a welding head positioned above the spot welding station and an upper spot welding electrode connected with the welding head. Compared with the prior art, the welding fixture has the advantages that the process stability is improved, the welding firmness is improved, the product spot welding efficiency and the product percent of pass are improved, and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of spot welding equipment, in particular to a spot welding device used for metal sheets and multi-strand wires. Background Art

[0002] The welding of metal sheets and multi-strand wires is widely used. At present, the connection between metal sheets and multi-strand wires in the market is mainly based on bonding, soldering, and crimping, which have low strength, poor process stability, low efficiency, uncontrollable operation process, and easy risk of connection point falling off. In addition, there are uncontrollable factors in the use of added substances.

[0003] Patent Publication No. CN219986643U discloses a spot welding device for diode processing, including a spot welding device body, a limiting mechanism is arranged at the top of the spot welding device body, a purification mechanism is arranged at one end of the limiting mechanism, and the purification mechanism includes a purification box, a spot welding head is arranged at the top of the spot welding device body, and a guide structure is arranged on one side of the spot welding head. By setting a limiting mechanism, the limiting mechanism is arranged on both sides of the top of the spot welding device body, and the diode is placed above the spot welding device body after being taken, and after the diode is placed at the bottom of the spot welding device body, the limiting plate can be pushed to limit the placed diode by starting the telescopic cylinder in the limiting mechanism, so that the diode is stably placed inside the spot welding device body, and it is not easy to cause displacement, and the spot welding is more accurate. However, the shape of the processed parts of the device is fixed and it is easy to adopt a mechanical positioning method, and the welding wire is a soft material with large randomness, and the reliability of this positioning method is relatively poor.

[0004] Patent publication number CN219767011U discloses a welding device for intracranial stimulation electrode sheets, which is used to weld wires to stimulation electrode sheets. The welding device includes a machine and a spot welding mechanism, which is arranged above the machine. The spot welding mechanism includes a wire fixing platform, a spot welding machine head, an upper spot welding rod, and a spot welding tool. The spot welding tool is connected to the machine, the spot welding machine head is located above the spot welding tool, and an upper spot welding rod is arranged below the spot welding machine head. A wire fixing platform is arranged on one side of the spot welding tool, and the wire fixing platform is used to place the wire to be welded. The spot welding tool is used to place the stimulation electrode sheet, and the upper spot welding rod is used to contact the welding position where the wire and the stimulation electrode sheet are connected. However, the welding parts of the device have no effective and precise positioning, and the welding wire is a soft material, which has neither adsorption function nor mechanical positioning. Its positioning effect is poor and the operation is difficult. Utility Model Content

[0005] The purpose of the utility model is to overcome the defects of the above-mentioned prior art and provide a spot welding device for metal sheets and multi-strand wires, increase process stability, improve welding reliability, and improve product spot welding efficiency and product qualification rate.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A spot welding device for metal sheets and multi-strand wires, used for spot welding metal sheets, multi-strand wires and transition pieces, comprises a machine platform and a spot welding mechanism placed on the machine platform, wherein the spot welding mechanism comprises:

[0008] Base plate;

[0009] A spot welding tool for placing and moving the metal sheet, multi-strand wire, and transition piece, comprising a first positioning and conveying assembly and a second positioning and conveying assembly, wherein the first positioning and conveying assembly is used to place the metal sheet and move it from the metal sheet loading station to the spot welding station, and the second positioning and conveying assembly is used to place the multi-strand wire and transition piece and convey them from the multi-strand wire loading station to the spot welding station, the metal sheet loading station and the multi-strand wire loading station are located on both sides of the spot welding station, and the metal sheet loading station is higher than the multi-strand wire loading station, the transition piece is located above the multi-strand wire and is in close contact with it, and when the metal sheet, multi-strand wire, and transition piece arrive at the spot welding station, the metal sheet is located above the multi-strand wire and transition piece, and the three are in close contact;

[0010] And a spot welding machine located at the spot welding station includes a welding head located above the spot welding station and an upper spot welding electrode connected to the welding head. When working, the upper spot welding electrode is used to contact the welding position where the metal sheet, multi-strand wire and transition piece are connected.

[0011] Furthermore, the metal sheet is made of tungsten, molybdenum, stainless steel, etc., and the multi-strand wire is made of multi-strand copper wire, alloy copper wire, etc. Since the melting points of the metal sheet and the multi-strand wire are very different, a transition sheet between the melting points of the metal sheet and the multi-strand wire is used for transition welding to increase welding stability and reliability.

[0012] Furthermore, the first positioning and conveying assembly includes:

[0013] a first mounting base plate fixed to the base plate;

[0014] A first cylinder mounted on the first mounting base plate includes a first piston rod that moves laterally;

[0015] And a first adsorption plate fixed above the end of the first piston rod, used for adsorbing the metal sheet, the first adsorption plate is placed horizontally, and a first groove for placing the metal sheet is provided on its upper surface, and a plurality of first adsorption holes for adsorbing the metal sheet are provided inside the first groove, and the first adsorption holes are connected to a vacuum valve.

[0016] Furthermore, the second positioning and conveying assembly includes:

[0017] A second mounting base plate fixed on the base plate, which has the same height as the first mounting base plate and has a certain interval therebetween;

[0018] A second cylinder mounted on the second mounting base plate includes a second piston rod that moves laterally and is opposite to the first piston rod;

[0019] And a second adsorption plate fixed above the end of the second piston rod, used for adsorbing the multi-strand wires and the transition piece, the second adsorption plate is placed horizontally, and a second groove for placing the multi-strand wires and a third groove for placing the transition piece are provided on its upper surface, the third groove is located at one end of the second groove and the two intersect, a plurality of second adsorption holes for adsorbing the multi-strand wires are provided inside the second groove, and the second adsorption holes are connected to the vacuum valve.

[0020] Furthermore, the vacuum valve includes a vacuum generator, a power nozzle, a muffler, and a vacuum interface, and its working principle is as follows: 1. Compressed air is sent into the vacuum generator. 2. Since the cross-section of the power nozzle is reduced, the flow rate of the compressed air is accelerated. The dynamic pressure increases, while the static pressure of the air decreases at the same time. 3. Once the compressed air passes through the power nozzle, the air with accelerated flow rate will expand and generate a vacuum. 4. The air is "sucked" into the vacuum generator through the vacuum interface. 5. The compressed air is discharged from the vacuum generator together with the "sucked" air through the muffler.

[0021] Furthermore, there are one or two vacuum valves. When there is one vacuum valve, the vacuum interface is connected to the first adsorption hole and the second adsorption hole, and the metal sheet, multiple strands of wire and transition piece are adsorbed and positioned at the same time when the vacuum valve is opened; when there are two vacuum valves, they are connected in parallel, one is connected to the first adsorption hole, and the other is connected to the second adsorption hole. The metal sheet is controlled to be adsorbed and positioned through one of the vacuum valves, and the multiple strands of wire and transition piece are controlled to be adsorbed and positioned through the other vacuum valve.

[0022] Furthermore, a start switch connected to the first cylinder and the second cylinder is provided on the bottom plate to control the metal sheet, the multi-strand wire and the transition sheet to move simultaneously.

[0023] Furthermore, the upper end of the welding head is connected to the upper spot welding cylinder and can move up and down, and the lower end is connected to the upper electrode clamp that clamps the upper spot welding electrode through the first lifting rod.

[0024] Furthermore, the spot welding machine also includes:

[0025] A lower spot welding cylinder mounted on the base plate;

[0026] A second lifting rod connected to the upper end of the lower spot welding cylinder;

[0027] a lower electrode clamp connected to the second lifting rod;

[0028] and a lower spot welding electrode opposite to the upper spot welding electrode and located below the spot welding station, wherein the lower electrode clamp clamps the lower spot welding electrode.

[0029] Furthermore, the requirements for the material of the upper spot welding electrode and the lower spot welding electrode include: 1. High electrical conductivity, so that it is difficult to generate heat even when a large current passes through; 2. Good thermal conductivity, so that it is easy to cool after heating; 3. High mechanical strength, so that it can maintain hardness even at high temperatures and does not deform when heated during pressurized impact and welding; 4. It is not easy to form an alloy with the object to be welded, and the electrode and the object to be welded are not easy to adhere. The welding head presses and fixes the upper spot welding electrode and the lower spot welding electrode to the object to be welded through the action of the upper spot welding cylinder and the pressure mechanism inside the head, and cools the welded points under pressure after power is turned on to melt them together.

[0030] Furthermore, the welding head is a pressurized follow-up welding head.

[0031] Furthermore, the spot welding device also includes a welding power source arranged on the machine platform and connected to the spot welding mechanism.

[0032] Furthermore, the welding power source adopts a precision transistor welding power source with excellent reliability and convenient operation. The structure of the transistor welding power source mainly includes a power transformer, a power transistor, a large-capacity capacitor energy storage, and a welding head, and uses the energy stored in the capacitor in advance to achieve precise controllable welding. The welding power source adopts a switch switching method to achieve small, efficient, and high-output welding. The rising speed of the welding current is very fast, which is most suitable for ultra-precision welding. The welding power supply control mode can select constant current, constant voltage, and constant current and constant voltage combined control, so that the connection welding of metal sheets and multi-strand wires is stable and reliable.

[0033] Furthermore, the spot welding device also includes:

[0034] A real-time image lens disposed on the machine platform and used to monitor the welding conditions of the metal sheet and the multiple wires;

[0035] A real-time image screen is arranged on the machine and connected to the real-time image lens to feed back its detection status. By visual inspection, the standard positions of the metal sheet and the multi-strand wires are marked with marking lines on the real-time image screen as comparison benchmark reference points for each product.

[0036] Furthermore, the spot welding device also includes a dust cover located on the machine platform and covering the spot welding mechanism, which is used to prevent dust from occurring in the spot welding mechanism.

[0037] The spot welding device is developed according to welding requirements to improve welding quality and welding efficiency, and includes a welding power source, a welding head, a real-time imaging lens, a real-time image screen, a spot welding tooling, etc.

[0038] Compared with the prior art, the utility model has the following advantages:

[0039] (1) The resistance welding device (i.e. spot welding device) is used, which has a short heating time and concentrated heat. When the molten core is formed, the welded parts will melt together, the product process will be more stable, the welding point will be more reliable, and the product will be assembled in the later stage, making the final product 100% qualified and avoiding failure due to unreliable welding.

[0040] (2) The spot welding mold is cleverly designed. The metal sheet is placed in the first groove of the first adsorption plate through the position marked in the real-time imaging device, and is adsorbed through the first adsorption hole; the multi-strand wire is placed in the second groove of the second adsorption plate through the position marked in the real-time image screen, and is adsorbed through the second adsorption hole; the transition piece is placed in the third groove for positioning; the geometric dimensions are effectively guaranteed, and vacuum adsorption and cylinder handling reduce manual operation. Vacuum adsorption uses compressed air to create a gas pressure difference through the mechanical device in the vacuum generator, so that the gas flows from the high-pressure area to the low-pressure area, that is, a vacuum environment is generated. The convenience of operation brought by the comprehensive mold and the reduction of manual operations improve the welding efficiency. The real-time image lens and the real-time image screen play the role of observation and monitoring, making the spot welding process more controllable. The design of the entire set of spot welding molds has innovations in function and convenient operation.

[0041] (3) The spot welding tooling action is optimized. After the three materials, multi-strand wire, transition piece, and metal sheet, are loaded into the mold according to their positions, the three materials are transported to the welding position through the cylinder through one-touch operation of the start switch and welded simultaneously. This solves the problems of low efficiency and dimensional instability of step-by-step welding, and adds innovation points based on the original single-step action.

[0042] (4) Through the transformation of the welding mechanism, the welding head is moved by cylinder instead of the original foot control, which effectively solves the stability of the movement and reduces the labor intensity of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 is a schematic structural diagram of the spot welding device shown in Example 1;

[0044] Figure 2 It is a front view of the spot welding mechanism shown in Example 1;

[0045] Figure 3 for Figure 2 A magnified schematic diagram of part A;

[0046] Figure 4 It is a schematic diagram of the structure when the metal sheet, multi-strand wire and transition piece shown in Example 1 arrive at the spot welding station;

[0047] Figure 5 This is a working principle diagram of the vacuum valve shown in Example 1.

[0048] Description of the markings in the figure:

[0049] 1-metal sheet; 2-multi-strand wire; 3-transition piece; 4-machine; 5-spot welding mechanism, 51-bottom plate, 52-spot welding tooling,

[0050] 521-first positioning assembly, 5211-first mounting base plate, 5212-first cylinder, 52121-first piston rod, 5213-first adsorption plate, 52131-first groove, 52132-first adsorption hole, 522-second positioning and conveying assembly, 5221-second mounting base plate, 5222-second cylinder, 52221-second piston rod, 5223-second adsorption plate, 52231-second groove, 52232-second adsorption hole, 52233-third groove, 523-vacuum valve, 5231-vacuum generator, 5232-power nozzle, 5233-muffler, 5234-vacuum interface, 53-spot welding machine, 531-upper spot welding cylinder, 532-upper spot welding electrode, 533-welding head, 534-lower spot welding cylinder, 5341-second lifting rod, 535-lower spot welding electrode, 536-start switch, 537-first lifting rod, 538-upper electrode clamp, 539-lower electrode clamp; 6-welding power supply; 7-real-time image lens; 8-real-time image screen; 9-dust cover. DETAILED DESCRIPTION

[0051] The utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments are implemented based on the technical solution of the utility model, and provide detailed implementation methods and specific operation processes, but the protection scope of the utility model is not limited to the following embodiments. In the following implementation methods or embodiments, if there is no special description of the functional components or structures, it indicates that they are all conventional components or conventional structures used in the field to achieve the corresponding functions.

[0052] It should be noted that in the description of the present invention, the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0053] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the following embodiments, the welding power source adopts the MDA-8000B transistor-type precision welding power source produced by Tiantian Welding Technology (Shanghai) Co., Ltd.; the welding head adopts the MH-108A servo motor welding head produced by Tiantian Welding Technology (Shanghai) Co., Ltd.

[0055] Example 1

[0056] like Figure 1 As shown, a spot welding device for metal sheets and multi-strand wires is used to realize spot welding of metal sheets 1, multi-strand wires 2 and transition pieces, including a machine table 4 and a spot welding mechanism 5 placed on the machine table 4, as shown in FIG. Figure 2 As shown, the spot welding mechanism 5 comprises:

[0057] Bottom plate 51;

[0058] The spot welding tool 52 for placing and moving the metal sheet 1, the multi-strand wire 2, and the transition piece 3 is as follows: Figure 3As shown, it includes a first positioning and conveying component 521 and a second positioning and conveying component 522. The first positioning and conveying component 521 is used to place the metal sheet 1 and move it from the metal sheet loading station to the spot welding station. The second positioning and conveying component 522 is used to place the multi-strand wire 2 and the transition piece 3 and convey them from the multi-strand wire loading station to the spot welding station. The metal sheet loading station and the multi-strand wire loading station are located on both sides of the spot welding station, and the metal sheet loading station is higher than the multi-strand wire loading station. The transition piece 3 is located above the multi-strand wire 2 and is in close contact with it. When the metal sheet 1, the multi-strand wire 2 and the transition piece 3 arrive at the spot welding station, the metal sheet 1 is located above the multi-strand wire 2 and the transition piece 3 and the three are in close contact, as shown in FIG. Figure 4 As shown;

[0059] And the spot welding machine 53 located at the spot welding station includes a welding head 533 located above the spot welding station, and an upper spot welding electrode 532 connected to the welding head 533. When working, the upper spot welding electrode 532 is used to contact the welding position where the metal sheet 1, the multi-strand wire 2 and the transition piece 3 are connected.

[0060] In this embodiment, if Figure 4 As shown, the present invention comprises three materials: a metal sheet 1, a multi-strand conductor 2 and a transition piece 3. The metal sheet 1 is made of stainless steel, and the multi-strand conductor 2 is made of copper wire. Since the melting points of the metal sheet 1 and the multi-strand conductor 2 are very different, a transition piece 3 between the melting points of the metal sheet 1 and the multi-strand conductor 2 is used for transition welding to increase welding stability and reliability.

[0061] In this embodiment, the first positioning and conveying component 521 includes:

[0062] A first mounting base plate 5211 fixed on the base plate 51;

[0063] A first cylinder 5212 mounted on the first mounting base plate 5211 includes a first piston rod 52121 that moves laterally;

[0064] And a first adsorption plate 5213 fixed above the end of the first piston rod 52121, used for adsorbing the metal sheet 1, the first adsorption plate 5213 is placed horizontally, and a first groove 52131 is provided on its upper surface for placing the metal sheet 1, and a plurality of first adsorption holes 52132 for adsorbing the metal sheet 1 are provided inside the first groove 52131, and the first adsorption holes 52132 are connected to the vacuum valve 523.

[0065] In this embodiment, the second positioning and conveying assembly 522 includes:

[0066] A second mounting base plate 5221 fixed on the base plate 51, which is at the same height as the first mounting base plate 5211 and has a certain interval therebetween;

[0067] The second cylinder 5222 installed on the second mounting base plate 5221 includes a second piston rod 52221 which moves laterally and is opposite to the first piston rod 52121;

[0068] And a second adsorption plate 5223 fixed above the end of the second piston rod 52221, used for adsorbing the multi-strand wire 2 and the transition piece 3, the second adsorption plate 5223 is placed horizontally, and its upper surface is provided with a second groove 52231 for placing the multi-strand wire 2 and a third groove 52233 for placing the transition piece 3, the third groove 52233 is located at one end of the second groove 52231 and the two intersect, and the second groove 52231 is provided with a plurality of second adsorption holes 52232 for adsorbing the multi-strand wire 2, and the second adsorption holes 52232 are connected to the vacuum valve 523.

[0069] In this embodiment, the vacuum valve 523 includes a vacuum generator 5231, a power nozzle 5232, a muffler 5233, and a vacuum interface 5234. Figure 5 As shown, its working principle is as follows: 1. Compressed air is sent into the vacuum generator 5231. 2. Since the cross-section of the power nozzle 5232 is reduced, the flow rate of the compressed air is accelerated. The dynamic pressure increases, while the static pressure of the air decreases at the same time. 3. Once the compressed air passes through the power nozzle 5232, the air with accelerated flow rate will expand and generate a vacuum. 4. The air is "sucked" into the vacuum generator 5231 through the vacuum interface 5234. 5. The compressed air is discharged from the vacuum generator 5231 together with the "sucked" air through the muffler 5233.

[0070] In this embodiment, there is one vacuum valve 523, and the vacuum interface 5234 is connected to the first adsorption hole 52132 and the second adsorption hole 52232. When the vacuum valve 523 is opened, the metal sheet 1, the multi-strand wire 2 and the transition piece 3 are adsorbed and positioned at the same time.

[0071] In this embodiment, a start switch 536 connected to the first cylinder 5212 and the second cylinder 5222 is provided on the bottom plate 51 to control the metal sheet 1, the multi-strand wire 2 and the transition piece 3 to move simultaneously.

[0072] In this embodiment, the upper end of the welding head 533 is connected to the upper spot welding cylinder 531 and can move up and down, and the lower end is connected to the upper electrode clamp that clamps the upper spot welding electrode 532 through the first lifting rod 537.

[0073] In this embodiment, the spot welding machine 53 further includes:

[0074] A lower spot welding cylinder 534 mounted on the base plate 51;

[0075] A second lifting rod 5341 connected to the upper end of the lower spot welding cylinder 534;

[0076] A lower electrode clamp 539 connected to the second lifting rod 5341;

[0077] And a lower spot welding electrode 535 opposite to the upper spot welding electrode 532 and located below the spot welding station, and the lower electrode clamp 539 clamps the lower spot welding electrode 535 .

[0078] In this embodiment, the requirements for the material of the upper spot welding electrode 532 and the lower spot welding electrode 535 include: 1. High electrical conductivity, and it is difficult to generate heat even when a large current passes through; 2. Good thermal conductivity, and it is easy to cool after heating; 3. High mechanical strength, and it can maintain hardness even at high temperatures and does not deform when heated during pressurized impact and welding; 4. It is not easy to form an alloy with the welded object, and the electrode and the welded object are not easy to bond. The welding head 533 presses and fixes the upper spot welding electrode 532 and the lower spot welding electrode 535 to the welded object through the action of the upper spot welding cylinder 531 and the pressure mechanism inside the head, and cools the welded points under pressure after power is turned on to melt them together. The upper spot welding electrode 532 and the lower spot welding electrode 535 are conventional existing technologies in this field.

[0079] In this embodiment, the welding head 533 is a pressurized follower welding head, and the first lifting rod 537 is slidably connected through a linear bearing of the internal structure of the welding head 533 and pressure-adjustable control is achieved by a pressurized spring.

[0080] In this embodiment, the spot welding device further includes a welding power source 6 which is arranged on the machine platform 4 and connected to the spot welding mechanism 5 .

[0081] In this embodiment, the welding power supply 6 adopts a precision transistor welding power supply with excellent reliability and convenient operation. The structure of the transistor welding power supply mainly includes a power transformer, a power transistor, a large-capacity capacitor energy storage, and a welding head, and uses the energy stored in the capacitor in advance to achieve precise controllable welding. The welding power supply 6 adopts a switch switching method to achieve small, efficient, and high-output welding. The rising speed of its welding current is very fast, which is most suitable for ultra-precision welding. Its characteristics include small input power capacity, power-on time can be controlled in units of 0.01ms, short-time high current, low pressure to suppress the occurrence of spatter, and most suitable for low-resistance materials. The welding power supply control mode is constant current control, which makes the connection and welding of metal sheets and multi-strand wires stable and reliable. At present, the precision transistor welding power supplies are widely used, mainly the MDA and MDB series of Miaki Company.

[0082] In this embodiment, the spot welding device further includes:

[0083] A real-time image lens 7 disposed on the machine platform 4 and used for monitoring the welding conditions of the metal sheet 1 and the multi-strand wires 2;

[0084] A real-time image screen 8 is arranged on the machine 4 and connected to the real-time image lens 7 to feed back its detection status. By visual inspection, the standard positions of the metal sheet 1 and the multi-strand wire 2 are marked with marking lines on the real-time image screen 8 as comparison benchmark reference points for each product.

[0085] In this embodiment, the spot welding device further comprises a dust cover 9 located on the machine platform 4 and covering the spot welding mechanism 5 , so as to prevent dust from occurring to the spot welding mechanism 5 .

[0086] The spot welding device is developed according to welding requirements to improve welding quality and welding efficiency, and includes a welding power source, a welding head, a real-time imaging lens, a real-time image screen, a spot welding tooling, etc.

[0087] The working principle of the spot welding device is:

[0088] Turn on the welding power supply 6, and place the metal sheet 1 into the first groove 52131 of the first adsorption plate 5213 through the metal sheet loading station and the multi-strand wire loading station positions marked on the real-time image screen 8, place the multi-strand wire 2 into the second groove 52231 of the second adsorption plate 5223, and place the transition piece 3 into the third groove 52233. Turn on the switch of the vacuum valve 523 to adsorb the metal sheet 1, the multi-strand wire 2 and the transition piece 3; press the start switch 536 to move the first cylinder 5212 to the right and the second cylinder 5222 to the left, and both move towards each other at the same time to approach the spot welding station. Based on the standard positions of the metal sheet 1 and the multi-strand wire 2 marked with marking lines on the real-time image screen 8, visually inspect the real-time image screen 8 to determine whether the metal sheet 1 and the multi-strand wire 2 have reached the reference point. When the metal sheet 1 is located above the multi-strand wire 2 and the transition piece 3 and the three are close to and overlapped, the three reach the spot welding position, that is, Figure 4 After being in place, the upper spot welding cylinder 531 and the lower spot welding cylinder 534 simultaneously push the upper spot welding electrode 532 and the lower spot welding electrode 535, so that the upper spot welding electrode 532 is closely attached to the metal sheet 1, and the lower spot welding electrode 535 is closely attached to the multi-strand wire 2, and the transition piece 3 is located between the two. After being in place, spot welding is performed, and after spot welding, the spot welding returns to the original point, and the vacuum adsorption is released, and the spot welded product is taken out.

[0089] The above description of the embodiments is to facilitate the understanding and use of the utility model by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the utility model without departing from the scope of the utility model should be within the scope of protection of the utility model.

Claims

1. A spot welding device for metal sheets and multi-strand wires, characterized in that: Used to realize spot welding of a metal sheet (1), a multi-strand wire (2) and a transition piece, comprising a machine platform (4) and a spot welding mechanism (5) placed on the machine platform (4), wherein the spot welding mechanism (5) comprises: Bottom plate (51); A spot welding tool (52) for placing and moving the metal sheet (1), the multi-strand wire (2), and the transition piece (3), comprising a first positioning and conveying component (521) and a second positioning and conveying component (522), wherein the first positioning and conveying component (521) is used to place the metal sheet (1) and move it from the metal sheet loading station to the spot welding station, and the second positioning and conveying component (522) is used to place the multi-strand wire (2) and the transition piece (3) and move them from the multi-strand wire loading station to the spot welding station. The metal sheet (1) is transported from the material station to the spot welding station, the metal sheet loading station and the multi-strand wire loading station are located on both sides of the spot welding station, and the metal sheet loading station is higher than the multi-strand wire loading station, the transition piece (3) is located above the multi-strand wire (2) and is in close contact with it, and when the metal sheet (1), the multi-strand wire (2) and the transition piece (3) arrive at the spot welding station, the metal sheet (1) is located above the multi-strand wire (2) and the transition piece (3) and the three are in close contact; And a spot welding machine (53) located at the spot welding station, comprising a welding head (533) located above the spot welding station, and an upper spot welding electrode (532) connected to the welding head (533). When in operation, the upper spot welding electrode (532) is used to contact the welding position where the metal sheet (1), the multi-strand wire (2) and the transition piece (3) are connected.

2. A spot welding device for metal sheets and multi-strand wires according to claim 1, characterized in that: The first positioning and conveying component (521) comprises: A first mounting base plate (5211) fixed on the base plate (51); A first cylinder (5212) mounted on the first mounting base plate (5211), comprising a first piston rod (52121) that moves laterally; and a first adsorption plate (5213) fixed above the end of the first piston rod (52121) for adsorbing the metal sheet (1); the first adsorption plate (5213) is placed horizontally, and a first groove (52131) for placing the metal sheet (1) is provided on its upper surface; a plurality of first adsorption holes (52132) for adsorbing the metal sheet (1) are provided inside the first groove (52131); the first adsorption holes (52132) are connected to the vacuum valve (523).

3. A spot welding device for metal sheets and multi-strand wires according to claim 2, characterized in that: The second positioning and conveying assembly (522) comprises: a second mounting base plate (5221) fixed on the base plate (51), which is at the same height as the first mounting base plate (5211) and has a certain interval therebetween; a second cylinder (5222) mounted on the second mounting base plate (5221), comprising a second piston rod (52221) that moves laterally and is opposite to the first piston rod (52121); and a second adsorption plate (5223) fixed above the end of the second piston rod (52221), used for adsorbing the multi-strand wire (2) and the transition piece (3); the second adsorption plate (5223) is placed horizontally, and its upper surface is provided with a second groove (52231) for placing the multi-strand wire (2) and a third groove (52233) for placing the transition piece (3); the third groove (52233) is located at one end of the second groove (52231) and the two intersect; a plurality of second adsorption holes (52232) for adsorbing the multi-strand wire (2) are provided inside the second groove (52231); the second adsorption holes (52232) are connected to the vacuum valve (523).

4. A spot welding device for metal sheets and multi-strand wires according to claim 3, characterized in that: The bottom plate (51) is provided with a start switch (536) connected to the first cylinder (5212) and the second cylinder (5222) to control the simultaneous movement of the metal sheet (1), the multi-strand wire (2) and the transition sheet (3).

5. A spot welding device for metal sheets and multi-strand wires according to claim 1, characterized in that: The upper end of the welding head (533) is connected to the upper spot welding cylinder (531) and can move up and down, and the lower end is connected to the upper electrode clamp that clamps the upper spot welding electrode (532) through the first lifting rod (537).

6. A spot welding device for metal sheets and multi-strand wires according to claim 1, characterized in that: The spot welding machine (53) further comprises: A lower spot welding cylinder (534) mounted on the base plate (51); A second lifting rod (5341) connected to the upper end of the lower spot welding cylinder (534); A lower electrode clamp (539) connected to the second lifting rod (5341); and a lower spot welding electrode (535) opposite to the upper spot welding electrode (532) and located below the spot welding station, wherein the lower electrode clamp (539) clamps the lower spot welding electrode (535).

7. A spot welding device for metal sheets and multi-strand wires according to claim 1, characterized in that: The welding head (533) is a pressurized follow-up welding head.

8. A spot welding device for metal sheets and multi-strand wires according to claim 1, characterized in that: The spot welding device also includes a welding power source (6) which is arranged on the machine platform (4) and connected to the spot welding mechanism (5).

9. A spot welding device for metal sheets and multi-strand wires according to claim 1, characterized in that: The spot welding device also includes: A real-time image lens (7) disposed on the machine platform (4) and used for monitoring the welding conditions of the metal sheet (1) and the multi-strand wires (2); A real-time image screen (8) is arranged on the machine (4) and connected to the real-time image lens (7) to feed back the detection status thereof. The standard positions of the metal sheet (1) and the multi-strand wire (2) are marked on the real-time image screen (8) with marking lines, which serve as reference points for comparison of each product.

10. A spot welding device for metal sheets and multi-strand wires according to claim 1, characterized in that: The spot welding device also includes a dust cover (9) located on the machine platform (4) and covering the spot welding mechanism (5), and is used to prevent dust from entering the spot welding mechanism (5).

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