A spot welding device for manufacturing linear motors

Abstract

The present invention relates to a spot welding device, and particularly to a spot welding device for manufacturing linear motors. A spot welding device for manufacturing linear motors is provided, which can shield the welding object to prevent the sparks generated during spot welding from splashing everywhere and improve the operation safety. The present invention is achieved through the following technical means: A spot welding device for manufacturing linear motors includes a spot welder, a spot welding head, a fixing plate, etc. A fixing plate is provided on the upper side of the front part of the spot welder, and a spot welding head for performing spot welding work is provided on the fixing plate, and the spot welding head is connected to the spot welder. The front side and the top of the linear motor can be covered by a partition plate and a cover plate, so that the arc and sparks generated during the electric welding work can be blocked to prevent splashing everywhere, and at the same time, it can prevent dust from splashing out and excessive noise from being generated during electric welding.

Description

Technical Field

[0001] The invention relates to a spot welding device, in particular to a spot welding device for manufacturing a linear motor. Background Art

[0002] When manufacturing linear motors, spot welding technology is usually required to assemble the motor components together, and a spot welding machine is needed at this time.

[0003] Patent publication number CN206936589U discloses a spot welding device for a door panel production line, comprising: a door panel conveying roller, the door panel conveying roller is used to convey door panels; a spot welding device mounting frame, the spot welding device mounting frame includes a mounting top frame located above the door panel conveying roller; and a door panel spot welding device, the door panel spot welding device includes a horizontal guide rail arranged on the mounting top frame, two slides sliding along the horizontal guide rail, a lifting and placing mechanism arranged on the slide in a one-to-one correspondence, and a slide moving actuator for driving the two slides to move synchronously in the opposite direction, wherein the horizontal guide rail is perpendicular to the conveying direction of the door panel conveying roller. The lifting and placing mechanism includes a bracket arranged on and below the slide, a lifting electrode located below the bracket, and an electrode lifting cylinder arranged on the bracket for lifting the lifting electrode. When the device performs spot welding, the rubber layer can protect the door panel, and can prevent the door panel from slipping when being transported on the door panel conveying roller, which is beneficial to improving the conveying accuracy of the door panel conveying roller. However, when the device performs spot welding on the door panel, the door panel is directly exposed to the outside world, and sparks are often generated during spot welding. If the spot welding position of the door panel is not shielded, sparks will fly everywhere, which is dangerous to the operator.

[0004] In view of the above technical problems, it is necessary to design a spot welding device for linear motor manufacturing that can shield the welding object, avoid sparks generated during spot welding from flying around, and improve operational safety. Summary of the invention

[0005] In order to overcome the shortcomings of existing spot welding devices that the weld is directly exposed to the outside world, sparks are often generated during spot welding, and sparks fly everywhere when the spot welding points of the weld are not shielded, which is dangerous to operators. A spot welding device for linear motor manufacturing is provided, which can shield the weld, avoid sparks generated during spot welding from flying everywhere, and improve operational safety.

[0006] The present invention is achieved through the following technical approaches: a spot welding device for manufacturing a linear motor, comprising a spot welding machine, a spot welding head and a fixed plate, a fixed plate being provided on the upper front side of the spot welding machine, a spot welding head for spot welding being provided on the fixed plate, the spot welding head being connected to the spot welding machine, and also comprising a placing mechanism and a partitioning mechanism, the spot welding machine being provided with a placing mechanism for placing a weld, and the spot welding machine being provided with a partitioning mechanism capable of blocking a weld.

[0007] As an improvement of the above-mentioned scheme, the placement mechanism includes a discharge plate, a first slide rail and a cylinder. The cylinder is symmetrically arranged on the left and right sides of the lower front side of the spot welding machine. A discharge plate for placing the welding object is connected between the tops of the cylinder telescopic rods. The first slide rail is symmetrically arranged on the left and right sides of the top front side of the spot welding machine. The discharge plate and the cylinder telescopic rod are both slidably connected to the first slide rail, and the discharge plate is slidably connected to the spot welding machine.

[0008] As an improvement of the above-mentioned scheme, the partition mechanism includes a cover plate, a U-shaped rod, a partition plate and a first spring. The U-shaped rod is symmetrically provided on the upper front side of the spot welding machine, and a cover plate is provided on the upper front side of the spot welding machine. The cover plate is located on the lower side of the U-shaped rod. A partition plate capable of blocking the welding object is slidably connected between the front sides of the U-shaped rod, and a first spring is connected between the rear side of the partition plate and the U-shaped rod.

[0009] As an improvement of the above scheme, it also includes a clamping mechanism that can clamp the weld, the clamping mechanism includes a clamping plate, a first pull rope, a slide plate, a slide rod and a second spring, slide plates are symmetrically arranged on the top of the discharge plate, the slide plates are slidably connected to the spot welding machine and the first slide rail, four slide rods are slidably arranged on the slide plates, the inner ends of the slide rods on the left and right sides are connected to clamping plates that can clamp the weld after moving inwards, four second springs are connected between the outer side of the clamping plate and the adjacent slide plates, the first pull ropes are arranged on the upper front side of the first slide rail, the first pull ropes pass through the adjacent slide plates and are connected to the clamping plate, and the clamping plates are slidably connected to the discharge plate.

[0010] As an improvement of the above scheme, it also includes a cleaning mechanism capable of cleaning the spot welding head, the cleaning mechanism includes a push plate, a sliding rod, a movable sleeve, a second slide rail, a cleaning brush and a third spring. The second slide rail is symmetrically provided on the upper front side of the spot welding machine, and the lower part of the second slide rail is slidably provided with a sliding rod, and a movable sleeve is connected between the inner ends of the sliding rods. Push plates are provided on the rear side of the top of the clamping plate, and the push plates are in contact with adjacent sliding rods. Four cleaning brushes capable of cleaning the spot welding head are evenly slidably provided on the movable sleeve, and a third spring is connected between the outer side of the cleaning brush and the movable sleeve, and the cleaning brushes are in contact with the spot welding head.

[0011] As an improvement of the above scheme, a cooling mechanism capable of achieving a cooling effect is also included, the cooling mechanism comprising a water tank, a second pull rope, a rotating shaft, a torsion spring and rotating blades. A water tank is provided at the bottom of the discharge plate, a rotating shaft is rotatably provided on the left side of the water tank, a rotating blade capable of stirring water after rotation is provided on the rotating shaft, the rotating blade is located in the water tank, a torsion spring is connected between the left side of the rotating shaft and the water tank, a second pull rope is wound around the left side of the rotating shaft, and the second pull rope is connected to the spot welding machine.

[0012] As an improvement of the above scheme, a scraper mechanism is also included, which includes a scraper plate, a movable plate and a pull rod. The left and right sides of the discharge plate are both slidably provided with movable plates, the front sides of the movable plates are provided with pull rods, and the scraper plate is connected between the top and rear sides of the movable plates.

[0013] As an improvement of the above solution, a plug is also included, and the plug is clamped on the right rear side of the water tank.

[0014] The advantages and positive effects of the present invention are as follows: 1. The front side and the top of the linear motor can be covered by the partition plate and the cover plate, so that the arc and sparks generated during electric welding can be blocked to avoid splashing everywhere, and at the same time, dust can be avoided from splashing and excessive noise can be avoided during electric welding.

[0015] 2. When the unloading plate moves upward, the clamping plate will also move inward to clamp the linear motor, so that the welding point of the linear motor can be aligned with the spot welding head, thus avoiding the error of the spot welding position.

[0016] 3. As the cleaning brush moves up and down, the spot welding head can be cleaned to remove debris on the spot welding head to avoid affecting the welding work.

[0017] 4. By rotating the blades to stir the water in the water tank, the heat generated by the spot welding work can be absorbed under the action of water to avoid damage to the components caused by overheating in the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0019] Figure 2 It is a partial three-dimensional structural schematic diagram of the present invention.

[0020] Figure 3 It is a schematic diagram of the first partial three-dimensional structure of the partition mechanism of the present invention.

[0021] Figure 4 It is a schematic diagram of a second partial three-dimensional structure of the partition mechanism of the present invention.

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the first part of the clamping mechanism of the present invention.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the second part of the clamping mechanism of the present invention.

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the first part of the cleaning mechanism of the present invention.

[0025] Figure 8 It is a schematic diagram of a second partial three-dimensional structure of the cleaning mechanism of the present invention.

[0026] Fig. 9 It is a schematic diagram of a first partial three-dimensional structure of the cooling mechanism of the present invention.

[0027] Fig.10 It is a schematic diagram of a second partial three-dimensional structure of the cooling mechanism of the present invention.

[0028] Fig.11 It is a three-dimensional structural schematic diagram of the scraping mechanism of the present invention.

[0029] Names of the numbers in the figure: 1: spot welding machine, 2: spot welding head, 3: fixed plate, 4: placing mechanism, 41: discharge plate, 42: first slide rail, 43: cylinder, 5: partition mechanism, 51: cover plate, 52: U-shaped rod, 53: partition plate, 54: first spring, 6: clamping mechanism, 61: clamping plate, 62: first pull rope, 63: slide plate, 64: slide rod, 65: second spring, 7: cleaning mechanism, 71: push plate, 72: slide rod, 73: movable sleeve, 74: second slide rail, 75: cleaning brush, 76: third spring, 8: cooling mechanism, 81: water tank, 82: second pull rope, 83: rotating shaft, 84: torsion spring, 85: rotating leaf, 9: scraping mechanism, 91: scraping plate, 92: movable plate, 93: pull rod, 18: plug. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that the directional terms such as up, down, left, right, front, back, inside, outside, etc. that appear or will appear in the text of the present invention are only based on the accompanying drawings of the present invention, and are not specific limitations of the present invention.

[0031] Example 1

[0032] A spot welding device for manufacturing linear motors, referring to Figure 1 As shown, the spot welding machine 1 includes a spot welding head 2, a fixing plate 3, a placing mechanism 4, and a partition mechanism 5. The fixing plate 3 is provided on the upper front side of the spot welding machine 1, and the spot welding head 2 is fixedly connected to the fixing plate 3 by bolts. The spot welding head 2 is used for spot welding. The spot welding head 2 is connected to the spot welding machine 1. The spot welding machine 1 is provided with a placing mechanism 4, and the placing mechanism 4 is used to place the weld. The spot welding machine 1 is provided with a partition mechanism 5, and the partition mechanism 5 can block the weld.

[0033] Reference Figure 2As shown, the placement mechanism 4 includes a discharge plate 41, a first slide rail 42 and a cylinder 43. The cylinder 43 is symmetrically arranged on the left and right sides of the lower front side of the spot welding machine 1. The discharge plate 41 is connected between the top of the telescopic rod of the cylinder 43. The discharge plate 41 is used to place the welded object. The first slide rail 42 is symmetrically arranged on the left and right sides of the top front side of the spot welding machine 1. The discharge plate 41 and the telescopic rod of the cylinder 43 are both slidably connected to the first slide rail 42, and the discharge plate 41 is slidably connected to the spot welding machine 1.

[0034] Reference Figure 3 and Figure 4 As shown, the partition mechanism 5 includes a cover plate 51, a U-shaped rod 52, a partition plate 53 and a first spring 54. The U-shaped rod 52 is symmetrically connected to the upper front side of the spot welding machine 1 by welding. The cover plate 51 is fixed to the upper front side of the spot welding machine 1. The cover plate 51 is located on the lower side of the U-shaped rod 52. A partition plate 53 is slidably connected between the front sides of the U-shaped rod 52. The partition plate 53 can block the weld, and a first spring 54 is connected between the rear side of the partition plate 53 and the U-shaped rod 52.

[0035] When the linear motor is manufactured and electric welding is required, the linear motor is placed on the discharge plate 41, and the cylinder 43 is started to work, so that the telescopic rod of the cylinder 43 is extended to drive the discharge plate 41 to move upward, so that the linear motor can move upward, and the linear motor moves upward until it contacts the partition plate 53 and continues to move, so that the partition plate 53 can move forward, and the first spring 54 is stretched. Under the reaction of the first spring 54, the partition plate 53 can always press against the linear motor, and then block the front side of the linear motor. When the linear motor contacts the spot welding head 2, the spot welding machine 1 can be started to work, and the spot welding machine 1 can work to the linear motor through the spot welding head 2 Spot welding is performed. At this time, the arc and sparks generated during the electric welding work can be blocked by the cover plate 51 and the partition plate 53. At the same time, dust splashing and excessive noise during electric welding can be avoided, thereby improving operational safety. After the electric welding is completed, the spot welding machine 1 is stopped, and the telescopic rod of the cylinder 43 is shortened to drive the discharge plate 41 to move downward and reset, so that the linear motor after the electric welding is completed moves downward and resets. The linear motor moves downward and no longer resists the partition plate 53. Under the action of the first spring 54, the partition plate 53 moves backward and resets, and then the cylinder 43 is stopped, and the linear motor is taken out from the discharge plate 41.

[0036] Example 2

[0037] Based on Example 1, Figure 1 , Figure 5 and Figure 6As shown, it also includes a clamping mechanism 6, which can clamp the welded object. The clamping mechanism 6 includes a clamping plate 61, a first pull rope 62, a slide plate 63, a slide bar 64 and a second spring 65. The slide plates 63 are symmetrically fixed to the top of the discharge plate 41. The slide plates 63 are slidably connected to the spot welding machine 1 and the first slide rail 42. Four slide bars 64 are slidably provided on the slide plates 63. The inner ends of the slide bars 64 on the left and right sides are fixed with a clamping plate 61. After the clamping plate 61 moves inward, the welded object can be clamped. Four second springs 65 are connected between the outer side of the clamping plate 61 and the adjacent slide plates 63. The first pull rope 62 is provided on the upper front side of the first slide rail 42. The first pull rope 62 passes through the adjacent slide plates 63 and is connected to the clamping plate 61. The clamping plate 61 is slidably connected to the discharge plate 41.

[0038] Initially, the second spring 65 is compressed, and the discharge plate 41 moves upward, driving the clamping plate 61, the first pull rope 62, the slide plate 63, the slide bar 64 and the second spring 65 to move upward, so that the first pull rope 62 can be gradually loosened, and under the action of the second spring 65, the clamping plate 61 can drive the slide bar 64 to move inward. The clamping plate 61 moves inward to clamp the linear motor. At the same time, under the action of the clamping plate 61, the welding point of the linear motor can be aligned with the spot welding head 2, so as to avoid the error of the spot welding position. After the electric welding is completed, the discharge plate 41 moves downward, driving the clamping plate 61, the first pull rope 62, the slide plate 63, the slide bar 64 and the second spring 65 to move downward and reset. The first pull rope 62 is gradually tightened, which can make the slide bar 64 and the clamping plate 61 move outward to release the linear motor. The second spring 65 is compressed, and the linear motor can be taken out.

[0039] Reference Figure 1 , Figure 7 and Figure 8 As shown, a cleaning mechanism 7 is also included, and the cleaning mechanism 7 can clean the spot welding head 2. The cleaning mechanism 7 includes a push plate 71, a sliding rod 72, a movable sleeve 73, a second slide rail 74, a cleaning brush 75 and a third spring 76. The second slide rail 74 is symmetrically fixed to the upper front side of the spot welding machine 1, and the lower part of the second slide rail 74 is slidably provided with a sliding rod 72, and a movable sleeve 73 is fixed between the inner ends of the sliding rod 72. Push plates 71 are fixed to the rear side of the top of the clamping plate 61, and the push plates 71 are in contact with adjacent sliding rods 72. Four cleaning brushes 75 are evenly slidably provided on the movable sleeve 73, and the cleaning brush 75 can clean the spot welding head 2. A third spring 76 is connected between the outer side of the cleaning brush 75 and the movable sleeve 73, and the cleaning brush 75 is in contact with the spot welding head 2.

[0040] The upward movement of the clamping plate 61 drives the push plate 71 to move upward. The upward movement of the push plate 71 drives the sliding rod 72, the movable sleeve 73, the cleaning brush 75 and the third spring 76 to move upward. Because the spot welding head 2 gradually becomes smaller from top to bottom, the cleaning brush 75 will also gradually move outward on the movable sleeve 73 during the upward movement. The third spring 76 is stretched, and under the reaction force of the third spring 76, the cleaning brush 75 can always press against the spot welding head 2. In this way, the spot welding head 2 can be cleaned under the action of the cleaning brush 75 to avoid the residual welding slag attached to the spot welding head 2 affecting the spot welding work. The downward movement of the clamping plate 61 drives the push plate 71 to move downward and gradually no longer presses against the sliding rod 72. Under the action of gravity, the sliding rod 72, the movable sleeve 73, the cleaning brush 75 and the third spring 76 move downward and reset. Under the action of the third spring 76, the cleaning brush 75 will also move inward and reset.

[0041] Reference Figure 1 , Fig. 9 and Fig.10 As shown, a cooling mechanism 8 is also included, which can achieve a cooling effect. The cooling mechanism 8 includes a water tank 81, a second pull rope 82, a rotating shaft 83, a torsion spring 84 and a rotating blade 85. The water tank 81 is fixedly connected to the bottom of the discharge plate 41. A rotating shaft 83 is rotatably provided on the left side of the water tank 81. A rotating blade 85 is fixedly connected to the rotating shaft 83. The rotating blade 85 can stir water. The rotating blade 85 is in the water tank 81. A torsion spring 84 is connected between the left side of the rotating shaft 83 and the water tank 81. A second pull rope 82 is wound around the left side of the rotating shaft 83, and the second pull rope 82 is connected to the spot welding machine 1.

[0042] Reference Fig.10 As shown, a plug 18 is also included, and the plug 18 is clamped on the right rear side of the water tank 81.

[0043] The discharge plate 41 moves upward, driving the water tank 81, the rotating shaft 83, the torsion spring 84 and the rotating blade 85 to move upward, so that the rotating shaft 83 can be rotated under the action of the second pull rope 82, the second pull rope 82 is released on the rotating shaft 83, the torsion spring 84 is deformed, the rotating shaft 83 rotates and drives the rotating blade 85 to rotate, and the rotating blade 85 rotates to stir the water in the water tank 81, so that the water can be shaken, so that when the spot welding work is performed, the temperature can be lowered under the action of the water to avoid the discharge caused by excessive temperature. When the plate 41 and other components are damaged, the discharge plate 41 moves downward, driving the water tank 81, the rotating shaft 83, the torsion spring 84 and the rotating blade 85 to move downward and reset. At this time, under the action of the torsion spring 84, the rotating shaft 83 drives the rotating blade 85 to rotate in the opposite direction to stir the water again, and the rotating shaft 83 rotates in the opposite direction to rewind the second pull rope 82. The staff can also pull out the plug regularly to replace the water in the water tank 81. After the replacement is completed, the plug can be plugged back. In this way, the water in the water tank 81 can be prevented from emitting odor after being used for too long.

[0044] Reference Figure 1 and Fig.11 As shown, it also includes a scraper mechanism 9, which includes a scraper plate 91, a movable plate 92 and a pull rod 93. The movable plates 92 are slidably provided on the left and right sides of the discharge plate 41, the front sides of the movable plates 92 are fixedly connected to the pull rods 93, and the scraper plate 91 is fixedly connected between the top and rear sides of the movable plates 92.

[0045] After the linear motor is taken out, the pull rod 93 can be pulled to drive the movable plate 92 and the scraper plate 91 to move forward. The scraper plate 91 moves forward to push out the welding slag dropped on the discharge plate 41, so that the welding slag can be cleaned. Then, the pull rod 93 is pushed back to drive the movable plate 92 and the scraper plate 91 to move backward and reset.

[0046] It should be understood that this embodiment is only used to illustrate the present invention and is not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the appended claims of the application.

Claims

1. A spot welding device for manufacturing a linear motor, comprising a spot welder (1), a spot welding head (2) and a fixing plate (3). The fixing plate (3) is provided on the upper side of the front part of the spot welder (1). The fixing plate (3) is provided with a spot welding head (2) for performing spot welding work. The spot welding head (2) is connected to the spot welder (1). It is characterized in that: It further comprises a placing mechanism (4) and a partitioning mechanism (5). The spot welder (1) is provided with the placing mechanism (4) for placing the welding object, and the spot welder (1) is provided with the partitioning mechanism (5) capable of blocking the welding object; The placing mechanism (4) comprises a feeding plate (41), a first slide rail (42) and a cylinder (43). The cylinders (43) are symmetrically arranged on the left and right sides of the lower part of the front of the spot welder (1). The top of the telescopic rod of the cylinder (43) is connected with the feeding plate (41) for placing the welding object. The first slide rails (42) are symmetrically arranged on the left and right sides of the front side of the top of the spot welder (1). The feeding plate (41) and the telescopic rod of the cylinder (43) are both slidably connected to the first slide rail (42), and the feeding plate (41) is slidably connected to the spot welder (1); The partitioning mechanism (5) comprises a covering plate (51), a U-shaped rod (52), a partitioning plate (53) and a first spring (54). The U-shaped rods (52) are symmetrically arranged on the left and right sides of the upper part of the front of the spot welder (1). The covering plate (51) is provided on the upper part of the front of the spot welder (1). The covering plate (51) is located below the U-shaped rod (52). The partitioning plate (53) capable of blocking the welding object is slidably connected between the front sides of the U-shaped rods (52). The first springs (54) are connected between the rear side of the partitioning plate (53) and the U-shaped rods (52); It further comprises a clamping mechanism (6) capable of clamping the welding object. The clamping mechanism (6) comprises a clamping plate (61), a first pulling rope (62), a sliding plate (63), a sliding rod (64) and a second spring (65). The sliding plates (63) are symmetrically arranged on the left and right sides of the top of the feeding plate (41). The sliding plates (63) are both slidably connected to the spot welder (1) and the first slide rail (42). Four sliding rods (64) are slidably arranged on each of the sliding plates (63). The inner ends of the sliding rods (64) on the left and right sides are both connected with the clamping plates (61) capable of clamping the welding object after moving inwards. Four second springs (65) are connected between the outer side of the clamping plate (61) and the adjacent sliding plate (63). The first pulling ropes (62) are arranged on the upper part of the front side of the first slide rail (42). The first pulling ropes (62) pass through the adjacent sliding plates (63) and are connected to the clamping plates (61). The clamping plates (61) are both slidably connected to the feeding plate (41).

2. A spot welding device for manufacturing a linear motor according to claim 1, It is characterized in that: It further includes a cleaning mechanism (7) capable of cleaning the spot welding head (2). The cleaning mechanism (7) includes a push plate (71), a sliding rod (72), a movable sleeve (73), a second slide rail (74), a cleaning brush (75), and a third spring (76). The second slide rails (74) are symmetrically arranged on the upper part of the front side of the spot welder (1) left and right. The sliding rods (72) are slidably arranged at the lower parts of the second slide rails (74). The movable sleeve (73) is connected between the inner ends of the sliding rods (72). The push plates (71) are arranged at the rear sides of the tops of the clamping plates (61). The push plates (71) are in contact with the adjacent sliding rods (72). Four cleaning brushes (75) capable of cleaning the spot welding head (2) are slidably arranged on the movable sleeve (73) evenly. The third springs (76) are connected between the outer sides of the cleaning brushes (75) and the movable sleeve (73). The cleaning brushes (75) are in contact with the spot welding head (2).

3. A spot welding device for manufacturing a linear motor according to claim 2, characterized in that: it further includes a cooling mechanism (8) capable of achieving a cooling effect. The cooling mechanism (8) includes a water tank (81), a second pulling rope (82), a rotating shaft (83), a torsion spring (84), and a rotating blade (85). The water tank (81) is arranged at the bottom of the material placing plate (41). The rotating shaft (83) is rotatably arranged on the left side of the water tank (81). The rotating blade (85) capable of stirring water after rotation is arranged on the rotating shaft (83). The rotating blade (85) is inside the water tank (81). The torsion spring (84) is connected between the left side of the rotating shaft (83) and the water tank (81). The second pulling rope (82) is wound around the left side of the rotating shaft (83). The second pulling rope (82) is connected to the spot welder (1).

4. A spot welding device for manufacturing a linear motor according to claim 3, characterized in that: it further includes a scraping mechanism (9). The scraping mechanism (9) includes a scraping plate (91), a movable plate (92), and a pull rod (93). The movable plates (92) are slidably arranged on the left and right sides of the material placing plate (41). The pull rods (93) are arranged at the front sides of the movable plates (92). The scraping plate (91) is connected between the rear sides of the tops of the movable plates (92).

5. A spot welding device for manufacturing a linear motor according to claim 4, characterized in that: it further includes a plug (18). The plug (18) is clamped at the right rear side of the water tank (81).

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