Spot welding device for heating plate of electric cooker

Abstract

The invention discloses a spot welding device for a heating plate of an electric cooker, particularly relates to the technical field of heating plates of electric cookers, and comprises a base and a positioning device. According to the spot welding device for the electric cooker heating disc, when the spot welding device is used, the heating disc to be subjected to spot welding is placed in the storage barrel, the first moving device drives the positioning device to get close to the discharging device, and under the cooperation of the discharging device, the heating disc in the storage barrel can be taken out, so that the heating disc falls into a containing groove of the positioning device; and under the arrangement of the discharging device, only one heating disc can be taken out to fall into the containing groove every time, meanwhile, the arranged fixing assembly can fix the heating disc in the containing groove, meanwhile, the arranged rotating assembly can drive the heating disc to rotate, the spot welding device can conveniently weld the heating disc, full-automatic spot welding can be achieved, and the spot welding efficiency is improved. The automatic spot welding machine for the heating disc replaces manual spot welding of the heating disc, improves the production efficiency of enterprises, reduces the production cost of the enterprises, and has wide application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of electric rice cooker heating plates, and particularly relates to a spot welding device for an electric rice cooker heating plate. Background Art

[0002] Heating plates can be used in a series of electric heating appliances such as electric kettles, coffee makers, soymilk makers, and milk pots. During production, heating plates usually need to be welded by a spot welder. Existing heating plates are generally spot welded manually, with low work efficiency, unable to meet the increasingly large shipping demands of factories, increasing labor intensity, and being costly. With the development and progress of society, the cost of using labor is also becoming increasingly high, causing certain economic pressure on enterprises. Summary of the Invention

[0003] The main purpose of the present invention is to provide a spot welding device for an electric rice cooker heating plate, which can effectively solve the problems in the background art.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0005] A spot welding device for an electric rice cooker heating plate includes a base and a positioning device. A support frame is fixedly installed at the front part of the upper end of the base. A storage barrel is fixedly installed at the top of the support frame. A blanking device is installed at the bottom of the support frame. A second moving device is installed at the rear part of the upper end of the base. A spot welding device is installed on the second moving device. A first moving device is fixedly installed at the upper end of the base. The positioning device is fixedly installed on the first moving device. The storage barrel and the support frame are provided with a blanking port at the bottom. Convex blocks are fixedly installed on both sides of the blanking port. Support legs are fixedly installed at the four corners of the bottom of the base.

[0006] Preferably, the blanking device includes a blanking plate and a first support plate. A groove is formed at the upper end of the blanking plate. Limiting grooves are formed in the left and right side walls of the groove. The convex blocks slide in the limiting grooves. A first panel is fixedly installed at the front part of the upper end of the groove. Third chutes are formed at the left and right sides of the rear part of the bottom wall of the groove. Connecting plates are slidably connected in the third chutes. A push plate is fixedly installed on the common top of the two connecting plates. A first cross plate is fixedly installed on the common bottom of the two connecting plates. A vertical plate is fixedly installed at the front side of the bottom of the first cross plate. The first support plate is fixedly installed at the front part of the upper end of the base. A first sliding rod is fixedly installed at the front end of the vertical plate. The front end of the first sliding rod penetrates through the first support plate and is fixedly installed with a first baffle. A spring is sleeved on the outer surface of the first sliding rod. The spring is located between the first support plate and the vertical plate. Second panels are fixedly installed at the left and right sides of the front end of the push plate. First chutes are formed at the left and right sides of the rear end of the first panel. The second panels penetrate and extend into the first chutes and are fixedly installed with second baffles. An inclined plate is fixedly installed at the lower part of the rear end of the blanking plate. The upper ends of the first panel and the second panel are flush with the upper end of the blanking plate.

[0007] Preferably, the first moving device includes two second support plates. The two second support plates are fixedly installed at the front and rear sides of the upper end of the base. A first screw rod is rotatably connected between the two second support plates. A second sliding rod is fixedly installed between the two second support plates. A first slider is slidably connected to the outer surface of the second sliding rod. A first driving block is threadedly connected to the outer surface of the first screw rod. A second motor is fixedly installed at the upper end of the second support plate. The output end of the second motor is fixedly connected to the first screw rod.

[0008] Preferably, the positioning device includes a feeding table. A rotating groove is formed at the top of the feeding table. A fixing component is rotatably connected in the rotating groove. A cavity is formed in the side wall of the rotating groove. A rotating component is fixedly installed in the cavity. The feeding table is fixedly installed on the tops of the first driving block and the first slider.

[0009] Preferably, the fixing component includes a turntable. A placing groove is formed in the middle of the upper end of the turntable. A plurality of receiving cavities are evenly formed in the side wall of the placing groove. An electric push rod is fixedly installed on the side wall of the receiving cavity. An extrusion plate is fixedly installed at the telescopic end of the electric push rod. A conical tube is fixedly installed at the top of the upper end of the placing groove. The turntable rotates in the rotating groove. A third electric telescopic rod is fixedly installed at the bottom of the placing groove. A top plate is fixedly installed at the top of the third electric telescopic rod.

[0010] Preferably, the rotating component includes a toothed ring and a first motor. The toothed ring is fixedly installed on the outer surface of the turntable. The first motor is fixedly installed at the bottom of the cavity. A gear is fixedly installed at the top of the first motor. The toothed ring meshes with the gear.

[0011] Preferably, the second moving device includes four third support plates. The four third support plates are divided into two groups and fixedly installed on the left and right sides of the base respectively. A second screw rod is rotatably connected between two third support plates on the same side. A support column is threadedly connected to the outer surface of the second screw rod. The tops of the two support columns are fixedly installed with a second cross plate together. A second chute is opened at the front end of the second cross plate. Fourth chutes are opened at both the upper and lower ends of the second chute. A third motor is fixedly installed on the third support plate. The output end of the third motor is fixedly connected to the second screw rod.

[0012] Preferably, the spot welding device includes a fourth motor and a third screw rod. The third screw rod rotates in the second chute. A second driving block is threadedly connected to the outer surface of the third screw rod. A second slider is fixedly installed at the front end of the second driving block. The second slider slides in the second chute. Limit blocks are fixedly installed at both the upper and lower ends of the second slider. The limit blocks slide in the fourth chutes. A fourth support plate is fixedly installed at the front end of the second slider. A second electric telescopic rod is fixedly installed at the bottom of the fourth support plate. A spot welder is fixedly installed at the bottom of the second electric telescopic rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The present invention discloses a spot welding device for a rice cooker heating plate. When in use, by placing the heating plate to be spot welded in the storage cylinder, when the first moving device drives the positioning device to approach the blanking device, with the cooperation of the blanking device, the heating plate in the storage cylinder can be taken out, so that the heating plate falls into the placement groove of the positioning device. And with the setting of the blanking device, only one heating plate can be taken out and fall into the placement groove each time. At the same time, the set fixing component can fix the heating plate in the placement groove, and the set rotating component can drive the heating plate to rotate, which can facilitate the spot welding device to weld the heating plate. It can perform fully automatic spot welding, replacing manual spot welding of the heating plate. While improving the production efficiency of the enterprise, it reduces the production cost of the enterprise and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 is a schematic diagram of the connection between the support frame and the blanking device of the present invention;

[0017] Figure 3 is a schematic diagram of the connection between the blanking device and the storage cylinder of the present invention;

[0018] Figure 4 is a schematic diagram of the connection of the blanking device of the present invention;

[0019] Figure 5The first sectional structure schematic diagram of the feeding table of the present invention;

[0020] Figure 6 The second sectional structure schematic diagram of the feeding table of the present invention;

[0021] Figure 7 The connection schematic diagram of the first moving device of the present invention;

[0022] Figure 8 The connection diagram of the third moving device and the spot welding device of the present invention.

[0023] In the figure: 1, base; 2, support frame; 3, storage cylinder; 4, blanking device; 5, first moving device; 6, positioning device; 7, second moving device; 8, spot welding device; 9, support leg; 21, convex block; 61, feeding table; 62, fixing component; 63, rotating component; 64, conical tube; 65, top plate; 631, gear ring; 632, gear; 633, first motor; 611, rotating groove; 612, cavity; 621, turntable; 622, placing groove; 623, storage cavity; 624, electric push rod; 625, pressing plate; 51, second support plate; 52, second sliding rod; 53, first screw rod; 54, first driving block; 55, second motor; 56, first slider; 71, third support plate; 72, second screw rod; 73, third motor; 74, second cross plate; 75, second sliding groove; 76, support column; 81, fourth motor; 82, third screw rod; 83, second driving block; 84, second slider; 85, fourth support plate; 86, second electric telescopic rod; 87, spot welder; 41, blanking plate; 42, groove; 43, first panel; 44, push plate; 45, connecting plate; 46, first cross plate; 47, vertical plate; 48, second panel; 431, first sliding groove; 49, first sliding rod; 410, spring; 411, first support plate; 412, first baffle; 413, inclined plate; 421, limiting groove; 422, third sliding groove; 414, second baffle; 751, fourth sliding groove. Detailed implementation manners

[0024] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0025] Such as Figure 1-8As shown in the figure, a spot welding device for a rice cooker heating plate includes a base 1 and a positioning device 6. A support frame 2 is fixedly installed at the front part of the upper end of the base 1. A material storage cylinder 3 is fixedly installed at the top of the support frame 2. A blanking device 4 is installed at the bottom of the support frame 2. A second moving device 7 is installed at the rear part of the upper end of the base 1. A spot welding device 8 is installed on the second moving device 7. A first moving device 5 is fixedly installed at the upper end of the base 1. The positioning device 6 is fixedly installed on the first moving device 5. The material storage cylinder 3 and the support frame 2 are provided with blanking openings at the bottom. Convex blocks 21 are fixedly installed on both sides of the blanking opening. Support legs 9 are fixedly installed at the four corners of the bottom of the base 1. When in use, the heating plate to be spot welded is stored in the material storage cylinder 3. During spot welding, the heating plate stored in the material storage cylinder 3 is conveyed into the positioning device 6 through the blanking device 4. The heating plate is fixed by the positioning device 6. Then, the first moving device 5 drives the positioning device 6 to move below the spot welding device 8. Then, the heating plate is spot welded by the spot welding device 8.

[0026] The blanking device 4 includes a blanking plate 41 and a first support plate 411. A groove 42 is formed at the upper end of the blanking plate 41. Restricting grooves 421 are formed on the left and right side walls of the groove 42. The convex block 21 slides in the restricting groove 421. A first panel 43 is fixedly installed at the front part of the upper end of the groove 42. Third sliding grooves 422 are formed on the left and right sides of the rear part of the bottom wall of the groove 42. A connecting plate 45 is slidably connected in the third sliding groove 422. A pushing plate 44 is fixedly installed on the top of the two connecting plates 45 together. A first cross plate 46 is fixedly installed on the bottom of the two connecting plates 45 together. A vertical plate 47 is fixedly installed on the front side of the bottom of the first cross plate 46. The first support plate 411 is fixedly installed at the front part of the upper end of the base 1. A first sliding rod 49 is fixedly installed at the front end of the vertical plate 47. The front end of the first sliding rod 49 penetrates through the first support plate 411 and is fixedly installed with a first baffle 412. A spring 410 is sleeved on the outer surface of the first sliding rod 49. The spring 410 is located between the first support plate 411 and the vertical plate 47. Second panels 48 are fixedly installed on the left and right sides of the front end of the pushing plate 44. First sliding grooves 431 are formed on the left and right sides of the rear end of the first panel 43. The second panel 48 penetrates and extends into the first sliding groove 431 and is fixedly installed with a second baffle 414. An inclined plate 413 is fixedly installed at the lower part of the rear end of the blanking plate 41. The upper ends of the first panel 43 and the second panel 48 are flush with the upper end of the blanking plate 41. During use, the positioning device 6 pushes the vertical plate 47 forward. The vertical plate 47 drives the first cross plate 46 forward. The first cross plate 46 drives the connecting plate 45 to slide in the third sliding groove 422, and then drives the pushing plate 44 forward. The pushing plate 44 drives the second panel 48 into the first sliding groove 431. The second panel 48 drives the blanking plate 41 forward, and then drives the first panel 43 away from the blanking port, driving the rear groove 42 to be located at the bottom of the blanking port. The heating plate in the storage cylinder 3 falls along the blanking port into the groove 42. Then the first moving device 5 drives the positioning device 6 away from the vertical plate 47. Under the elastic force of the spring 410, the vertical plate 47 is pushed backward, and then the pushing plate 44 is driven backward by the connecting plate 45 to push the heating plate in the groove 42 backward. When the pushing plate 44 moves to the rearmost side of the groove 42, the heating plate falls along the inclined plate 413 into the positioning device 6. At the same time, the second panel 48 drives the first panel 43 backward to the position of the blanking port, thereby blocking the blanking port. This process is repeated to take out one heating plate in turn.

[0027] The first mobile device 5 includes two second support plates 51, which are fixedly installed on the front and rear sides of the upper end of the base 1. A first screw rod 53 is rotatably connected between the two second support plates 51. A second sliding rod 52 is fixedly installed between the two second support plates 51. A first slider 56 is slidably connected to the outer surface of the second sliding rod 52. A first driving block 54 is threadedly connected to the outer surface of the first screw rod 53. A second motor 55 is fixedly installed on the upper end of the second support plate 51, and the output end of the second motor 55 is fixedly connected to the first screw rod 53. During use, the second motor 55 drives the first screw rod 53 to rotate, and the first screw rod 53 drives the first driving block 54 to move, thereby driving the positioning device 6 to move. It can drive the positioning device 6 to move forward and approach the feeding device 4, take out a heating plate through the feeding device 4 and place it in the positioning device 6, or drive the positioning device 6 to move backward to the lower part of the spot welding device 8, and weld the heating plate through the spot welding device 8.

[0028] The positioning device 6 includes a feeding table 61, which is located behind the vertical plate 47. A rotating groove 611 is opened at the top of the feeding table 61. A fixing component 62 is rotatably connected in the rotating groove 611. A cavity 612 is opened on the side wall of the rotating groove 611. A rotating component 63 is fixedly installed in the cavity 612. The feeding table 61 is fixedly installed on the tops of the first driving block 54 and the first slider 56. The fixing component 62 includes a turntable 621. A placing groove 622 is opened in the middle of the upper end of the turntable 621. A plurality of receiving cavities 623 are evenly opened on the side wall of the placing groove 622. An electric push rod 624 is fixedly installed on the side wall of the receiving cavity 623. The telescopic end of the electric push rod 624 is fixedly installed with a pressing plate 625. A conical tube 64 is fixedly installed on the top of the upper end of the placing groove 622. The turntable 621 rotates in the rotating groove 611. A third electric telescopic rod is fixedly installed at the bottom of the placing groove 622, and a top plate 65 is fixedly installed at the top of the third electric telescopic rod. The rotating component 63 includes a gear ring 631 and a first motor 633. The gear ring 631 is fixedly installed on the outer surface of the turntable 621. The first motor 633 is fixedly installed at the bottom of the cavity 612, and a gear 632 is fixedly installed at the top of the first motor 633. The gear ring 631 meshes with the gear 632. The electric push rod 624 drives the pressing plate 625 to move towards the middle of the placing groove 622, and the heating plate in the placing groove 622 is fixed by the pressing plate 625, avoiding the movement of the heating plate during spot welding and affecting the spot welding effect of the heating plate. At the same time, the first motor 633 is set to drive the gear 632 to rotate, the gear 632 drives the gear ring 631 to rotate, the gear ring 631 drives the turntable 621 to rotate, and the turntable 621 drives the heating plate to rotate, facilitating the spot welding device 8 to weld the heating plate.

[0029] The second moving device 7 includes four third support plates 71. The four third support plates 71 are divided into two groups and fixedly installed on the left and right sides of the base 1 respectively. A second screw rod 72 is rotatably connected between two third support plates 71 on the same side. A support column 76 is threadedly connected to the outer surface of the second screw rod 72. The tops of the two support columns 76 are fixedly installed with a second cross plate 74. A second chute 75 is formed at the front end of the second cross plate 74. Fourth chutes 751 are formed at both the upper and lower ends of the second chute 75. A third motor 73 is fixedly installed on the third support plate 71. The output end of the third motor 73 is fixedly connected to the second screw rod 72. The spot welding device 8 includes a fourth motor 81 and a third screw rod 82. The third screw rod 82 rotates in the second chute 75. A second driving block 83 is threadedly connected to the outer surface of the third screw rod 82. A second slider 84 is fixedly installed at the front end of the second driving block 83. The second slider 84 slides in the second chute 75. Limit blocks are fixedly installed at both the upper and lower ends of the second slider 84. The limit blocks slide in the fourth chutes 751. A fourth support plate 85 is fixedly installed at the front end of the second slider 84. A second electric telescopic rod 86 is fixedly installed at the bottom of the fourth support plate 85. A spot welder 87 is fixedly installed at the bottom of the second electric telescopic rod 86. During use, the third motor 73 drives the second screw rod 72 to rotate. The second screw rod 72 drives the support column 76 to move. The support column 76 drives the second cross plate 74 to move. The second cross plate 74 drives the spot welding device 8 to move back and forth. At the same time, the fourth motor 81 drives the third screw rod 82 to rotate. The third screw rod 82 drives the second driving block 83 to move. The second driving block 83 drives the second slider 84 to slide in the fourth chutes 751, thereby driving the spot welder 87 to move. At the same time, the second electric telescopic rod 86 provided can drive the spot welder 87 to move up and down to weld the heating plate.

[0030] When the present invention is in use, by placing the heating plate to be spot welded in the storage cylinder 3, when the first moving device 5 drives the positioning device 6 to approach the feeding device 4, with the cooperation of the feeding device 4, the heating plate in the storage cylinder 3 can be taken out, and the heating plate falls into the placement groove 622 of the positioning device 6. And with the setting of the feeding device 4, only one heating plate can be taken out and fall into the placement groove 622 each time. At the same time, the fixed component 62 provided can fix the heating plate in the placement groove 622. At the same time, the rotating component 63 provided can drive the heating plate to rotate, which can facilitate the spot welding device 8 to weld the heating plate, and can perform fully automatic spot welding, replacing manual spot welding of the heating plate, which is accurate, efficient and saves labor costs.

[0031] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A spot welding device for a heating plate of an electric rice cooker, characterized in that: The invention comprises a base (1) and a positioning device (6), wherein a support frame (2) is fixedly mounted on the front of the upper end of the base (1), a storage barrel (3) is fixedly mounted on the top of the support frame (2), a feeding device (4) is mounted on the bottom of the support frame (2), a second moving device (7) is mounted on the rear of the upper end of the base (1), a spot welding device (8) is mounted on the second moving device (7), a first moving device (5) is fixedly mounted on the upper end of the base (1), the positioning device (6) is fixedly mounted on the first moving device (5), a feeding opening is formed at the bottom of the storage barrel (3) and the support frame (2), convex blocks (21) are fixedly mounted on the left and right sides of the feeding opening, and support legs (9) are fixedly mounted on the four corners of the bottom of the base (1).

2. The spot welding device for a heating plate of an electric rice cooker according to claim 1, characterized in that: The unloading device (4) comprises an unloading plate (41) and a first supporting plate (411), the upper end of the unloading plate (41) is provided with a groove (42), the left and right side walls of the groove (42) are provided with limiting grooves (421), the convex block (21) slides in the limiting groove (421), the front part of the upper end of the groove (42) is fixedly installed with a first panel (43), the left and right sides of the rear part of the bottom wall of the groove (42) are provided with third sliding grooves (422), the third sliding grooves (422) are slidably connected with a connecting plate (45), the tops of the two connecting plates (45) are jointly fixedly installed with a push plate (44), the bottoms of the two connecting plates (45) are jointly fixedly installed with a first horizontal plate (46), the front side of the bottom of the first horizontal plate (46) is fixedly installed with a vertical plate (47), and the first supporting plate (411) is fixedly installed on the upper end of the base (1). At the front, a first slide bar (49) is fixedly installed at the front end of the vertical plate (47), and the front end of the first slide bar (49) passes through the first support plate (411) and is fixedly installed with a first baffle (412). A spring (410) is sleeved on the outer surface of the first slide bar (49), and the spring (410) is located between the first support plate (411) and the vertical plate (47). Second panels (48) are fixedly installed on both sides of the front end of the push plate (44), and first slide grooves (431) are opened on both sides of the rear end of the first panel (43). The second panel (48) passes through and extends into the first slide groove (431) and is fixedly installed with a second baffle (414). An inclined plate (413) is fixedly installed at the lower part of the rear end of the blanking plate (41), and the upper ends of the first panel (43) and the second panel (48) are flush with the upper end of the blanking plate (41).

3. The spot welding device for a heating plate of an electric rice cooker according to claim 1, characterized in that: The first moving device (5) comprises two second support plates (51), the two second support plates (51) are fixedly mounted on the front and rear sides of the upper end of the base (1), a first screw rod (53) is rotatably connected between the two second support plates (51), a second sliding rod (52) is fixedly mounted between the two second support plates (51), a first sliding block (56) is slidably connected to the outer surface of the second sliding rod (52), a first driving block (54) is threadedly connected to the outer surface of the first screw rod (53), a second motor (55) is fixedly mounted on the upper end of the second support plate (51), and an output end of the second motor (55) is fixedly connected to the first screw rod (53).

4. The spot welding device for a heating plate of an electric rice cooker according to claim 1, characterized in that: The positioning device (6) comprises a feeding platform (61), a rotating groove (611) is provided on the top of the feeding platform (61), a fixed component (62) is rotatably connected in the rotating groove (611), a cavity (612) is provided on the side wall of the rotating groove (611), a rotating component (63) is fixedly installed in the cavity (612), and the feeding platform (61) is fixedly installed on the top of the first driving block (54) and the first sliding block (56).

5. The spot welding device for a heating plate of an electric rice cooker according to claim 4, characterized in that: The fixing assembly (62) comprises a rotating disk (621), a placement groove (622) is provided in the middle of the upper end of the rotating disk (621), a plurality of storage chambers (623) are evenly provided on the side wall of the placement groove (622), an electric push rod (624) is fixedly installed on the side wall of the storage chamber (623), an extrusion plate (625) is fixedly installed on the telescopic end of the electric push rod (624), a conical tube (64) is fixedly installed on the top of the upper end of the placement groove (622), the rotating disk (621) rotates in the rotating groove (611), a third electric telescopic rod is fixedly installed on the bottom of the placement groove (622), and a top plate (65) is fixedly installed on the top of the third electric telescopic rod.

6. The spot welding device for a heating plate of an electric rice cooker according to claim 4, characterized in that: The rotating assembly (63) comprises a ring gear (631) and a first motor (633); the ring gear (631) is fixedly mounted on the outer surface of the turntable (621); the first motor (633) is fixedly mounted on the bottom of the cavity (612); a gear (632) is fixedly mounted on the top of the first motor (633); and the ring gear (631) is meshed with the gear (632).

7. The spot welding device for a heating plate of an electric rice cooker according to claim 1, characterized in that: The second moving device (7) comprises four third support plates (71), the four third support plates (71) are divided into two groups and fixedly mounted on the left and right sides of the base (1), a second screw rod (72) is rotatably connected between two third support plates (71) located on the same side, a support column (76) is threadedly connected to the outer surface of the second screw rod (72), a second cross plate (74) is fixedly mounted on the top of the two support columns (76), a second slide groove (75) is provided at the front end of the second cross plate (74), and fourth slide grooves (751) are provided at both the upper and lower ends of the second slide groove (75), a third motor (73) is fixedly mounted on the third support plate (71), and an output end of the third motor (73) is fixedly connected to the second screw rod (72).

8. The spot welding device for a heating plate of an electric rice cooker according to claim 1, characterized in that: The spot welding device (8) comprises a fourth motor (81) and a third screw (82), wherein the third screw (82) rotates in the second slide groove (75), the outer surface of the third screw (82) is threadedly connected with a second driving block (83), a second slider (84) is fixedly mounted at the front end of the second driving block (83), the second slider (84) slides in the second slide groove (75), the upper and lower ends of the second slider (84) are fixedly mounted with limiting blocks, the limiting blocks slide in the fourth slide groove (751), a fourth support plate (85) is fixedly mounted at the front end of the second slider (84), a second electric telescopic rod (86) is fixedly mounted at the bottom of the fourth support plate (85), and a spot welding machine (87) is fixedly mounted at the bottom of the second electric telescopic rod (86).

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