Spot-free automatic welding machine

Abstract

This invention discloses an automatic welding machine that eliminates the need for spot welding, comprising a welding torch, a moving device, and a worktable. The worktable is equipped with a tooling fixture, which includes a lower fixed base, a lower workpiece mold, an upper workpiece mold, an upper fixed block, and a support block. The upper fixed block is fixedly connected to the support block and positioned above the lower fixed base. The lower workpiece mold is fixed inside the lower fixed base, and the upper workpiece mold is fixedly connected to the upper fixed block. A lifting cylinder is connected to the bottom of the lower fixed base to control the lifting and lowering of the fixed base. When the lower fixed base is lifted, the upper and lower workpiece molds clamp the workpiece, and the moving device drives the welding torch to weld along the weld seam of the workpiece. This invention eliminates the need for spot welding when welding workpieces, enabling automated welding with high efficiency.

Description

Technical Field

[0001] The invention relates to the field of automatic welding equipment, and in particular to an automatic welding machine free of spot welding. Background Art

[0002] Tubular metal parts with openings, such as knife handles and door handles, are mainly formed by welding to fix the upper and lower workpieces. In order to prevent the workpieces from shifting during welding, the workpieces must first be spot-welded and then welded along the weld between the upper and lower workpieces. In order to improve production efficiency, people have invented automatic welding machines. However, existing automatic welding machines still need to spot-weld the workpieces, which makes it impossible to weld the workpieces into place in one step, seriously affecting production efficiency. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an automatic welding machine with high production efficiency and free of spot welding fixation.

[0004] In order to solve the above technical problems, the technical solution of the present invention is:

[0005] The spot-free automatic welding machine comprises a welding gun, a moving device, and a workbench, and is characterized in that: the workbench is provided with a fixture, and the fixture comprises a lower fixed seat, a lower workpiece mold, an upper workpiece mold, an upper fixed block and a support block, the upper fixed block is arranged above the lower fixed seat by being fixedly connected to the support block, the lower workpiece mold is fixed in the lower fixed seat, the upper workpiece mold is fixedly connected to the upper fixed block, and a lifting cylinder for controlling the lifting of the fixed seat is connected to the bottom of the lower fixed seat, when the lower fixed seat is lifted, the upper workpiece mold and the lower workpiece mold clamp the workpiece, and the moving device drives the welding gun to weld along the weld seam of the workpiece.

[0006] According to a further improvement of the present invention, the support block is arranged on one lateral side of the lower fixing seat, the upper fixing block is a rectangular parallelepiped, and the fixing block is vertically connected to the support block.

[0007] A further improvement of the present invention is that the support block is arranged on one longitudinal side of the lower fixed seat, the upper fixed block includes a first transverse section and a longitudinal section connected, the first transverse section is arranged above the lower fixed seat, and the fixed block is vertically connected to the support block.

[0008] According to a further improvement of the present invention, water cooling pipes are provided inside the support block, the upper fixing block and the lower fixing seat.

[0009] A further improvement of the present invention is that an adjusting bolt is provided on the side of the lower fixed seat, and the adjusting bolt is evenly distributed around the lower fixed seat, the adjusting bolt clamps the lower workpiece mold, a positioning hole is provided on the top of the upper workpiece mold, and the upper fixed block is provided with a positioning pin that cooperates with the positioning hole, and the upper fixed block is fixedly connected to the upper workpiece mold by a fixing bolt.

[0010] A further improvement of the present invention is that the lifting cylinder is fixedly installed in the swinging member, a rotating hole is provided in the middle of the swinging member, a locking plate fixedly connected to the workbench is provided under the workbench, the locking plate is provided with a rotating pin matching the rotating hole, the locking plate is fixedly connected to the swinging member by a locking bolt, and when the locking bolt is loosened, the swinging member can rotate around the rotating pin.

[0011] A further improvement of the present invention further comprises an adjusting device for manually adjusting the position of the welding gun, the adjusting device comprising:

[0012] A longitudinal adjustment device, the longitudinal adjustment device comprising a longitudinal fixing plate, a longitudinal adjustment plate, a longitudinal adjustment nut, a longitudinal adjustment screw and a longitudinal connecting column, the longitudinal fixing plate is connected to the longitudinal adjustment plate through the longitudinal connecting column, the longitudinal adjustment plate can move along the longitudinal connecting column, one end of the longitudinal adjustment screw is fixedly connected to the longitudinal adjustment nut, the longitudinal adjustment nut passes through the longitudinal fixing plate and is screwed to the longitudinal adjustment plate, and the longitudinal adjustment screw passes through the longitudinal adjustment plate;

[0013] A transverse adjustment device, the transverse adjustment device comprising a transverse fixing plate, a transverse adjustment plate, a transverse adjustment nut, a transverse adjustment screw and a transverse connecting column, the transverse fixing plate is connected to the transverse adjustment plate through the transverse connecting column, the transverse adjustment plate can move along the transverse connecting column, one end of the transverse adjustment screw is fixedly connected to the transverse adjustment nut, the transverse adjustment screw passes through the transverse fixing plate and is screwed to the transverse adjustment plate, and the transverse adjustment screw passes through the transverse adjustment plate;

[0014] And a vertical adjustment device, the vertical adjustment device includes a vertical fixing plate, a vertical adjustment plate, a vertical adjustment nut, a vertical adjustment screw and a vertical connecting column, the vertical fixing plate is connected to the vertical adjustment plate through the vertical connecting column, the vertical adjustment plate can move along the vertical connecting column, one end of the vertical adjustment screw is fixedly connected to the vertical adjustment nut, the vertical adjustment screw passes through the vertical fixing plate and is screwed to the vertical adjustment plate, and the vertical adjustment screw runs through the vertical adjustment plate.

[0015] A further improvement of the present invention is that the transverse adjustment plate is fixedly connected to the longitudinal connecting column, the transverse fixing plate is fixedly connected to the vertical adjustment plate, the vertical fixing plate is fixedly connected to the moving device, and the welding gun is fixedly connected to the longitudinal adjustment plate.

[0016] A further improvement of the present invention is that the moving device includes a transverse moving device, a longitudinal moving device, a vertical moving device and a rotational moving device, the transverse moving device is arranged on the workbench, the longitudinal moving device is vertically connected to the transverse moving device and can slide on the transverse moving device, the vertical moving device is respectively perpendicular to the transverse moving device and the longitudinal moving device, the vertical moving device is connected to the longitudinal moving device and can slide on the longitudinal moving device, and the rotational moving device is vertically connected to the vertical moving device and can slide on the vertical moving device.

[0017] According to a further improvement of the present invention, the rotary moving device comprises a rotary motor and a driven wheel, two driven wheels are provided, the rotary motor drives the driven wheel to rotate via a synchronous belt, and the rotating shaft of the driven wheel is connected to the welding gun.

[0018] By adopting the above technical scheme, during welding, the lower fixed seat rises, the upper workpiece mold and the lower workpiece mold clamp the workpiece, and the moving device drives the welding gun to weld along the weld seam of the workpiece according to the program path of the CNC programming. There is no need to pre-fix the workpiece for spot welding, and the welding efficiency is high and the quality is good. In addition, the side of the lower fixed seat is provided with an adjusting bolt that can adjust the position of the lower workpiece mold in the horizontal and longitudinal directions, and the bottom of the lower fixed seat is connected to a swing that can adjust the horizontality of the lower workpiece mold to ensure that the position of the lower workpiece mold matches the position of the upper workpiece mold. In addition, the present invention is also provided with an adjusting device that can manually adjust the position of the welding gun to ensure that the welding gun is in perfect contact with the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0020] Figure 2 The structure of the present invention is schematically shown Figure 2 ;

[0021] Figure 3 The structure of the present invention is schematically shown Figure 3 ;

[0022] Figure 4 It is a schematic diagram of the upper fixed block structure of the "I"-shaped structure;

[0023] Markings in the figure: 100, welding gun; 200, workbench; 300, fixture; 310, lower fixed seat; 311, adjusting bolt; 320, lower workpiece mold; 330, upper workpiece mold; 340, upper fixed block; 341, first transverse section; 342, longitudinal section; 343, second transverse section; 350, support block; 400, lifting cylinder; 500, swinging member; 510, locking plate; 511, rotating pin; 512, locking bolt; 600, adjusting device; 610, longitudinal adjusting device 610; 611, longitudinal fixing plate; 612, longitudinal adjusting plate; 613, longitudinal adjusting nut; 614, longitudinal adjusting screw; 615, longitudinal connecting column; 620, transverse adjusting device; 621, transverse fixing plate; 622, transverse adjusting plate; 623, transverse adjusting nut; 624, transverse adjusting screw; 625, transverse connecting column; 630, vertical adjusting device; 631, vertical fixing plate; 632, vertical adjusting plate; 633, vertical adjusting nut; 634, vertical adjusting screw; 635, vertical connecting column; 700, moving device; 710, transverse moving device 710; 720, longitudinal moving device; 730, vertical moving device; 740, rotating moving device; 741, rotating motor; 742, driven wheel; 743, synchronous belt. DETAILED DESCRIPTION

[0024] like Figures 1 to 4 The embodiment of the present invention shown in the figure is a spot-free automatic welding machine, comprising a welding gun 100, a moving device 700, and a workbench 200, wherein the workbench 200 is provided with a fixture 300, and the fixture 300 comprises a lower fixed seat 310, a lower workpiece die 320, an upper workpiece die 330, an upper fixed block 340 and a support block 350, wherein the upper fixed block 340 is arranged above the lower fixed seat 310 by being fixedly connected with the support block 350, the lower workpiece die 320 is fixed in the lower fixed seat 310, the upper workpiece die 330 is fixedly connected with the upper fixed block 340, and a lifting cylinder 400 for controlling the lifting of the fixed seat is connected to the bottom of the lower fixed seat 310, When the fixed seat 310 is lifted, the upper workpiece mold 330 and the lower workpiece mold 320 clamp the workpiece, a welding machine is provided under the workbench 200, the welding gun 100 is connected to the welding machine, and the moving device 700 drives the welding gun 100 to weld along the weld of the workpiece. During the welding operation, it is only necessary to place the workpiece into the upper workpiece mold 330 and the lower workpiece mold 320, and after pressing the start button, the lower fixed seat 310 will rise, and the lower workpiece mold 320 and the upper workpiece mold 330 cooperate to clamp the workpiece, and the moving device 700 drives the welding gun 100 to weld along the weld of the workpiece according to the program path of the CNC programming, and there is no need to pre-fix the workpiece for spot welding, so the welding efficiency is high and the quality is good.

[0025] The support block 350 is arranged on one lateral side of the lower fixed seat 310, and the upper fixed block 340 is a rectangular parallelepiped. The fixed block is vertically connected to the support block 350. During welding, due to the obstruction of the support block 350, the welding gun 100 cannot weld the side corresponding to the workpiece and the support block 350. Therefore, this embodiment is suitable for workpieces with openings (weld point-free) in the lateral direction, such as tool handles. Water cooling pipes are arranged inside the support block 350, the upper fixed block 340 and the lower fixed seat 310. The cooling pipes are connected to cooling water to cool the support block 350, the upper fixed block 340 and the lower fixed seat 310 to avoid deformation due to excessive temperature.

[0026] In addition, the support block 350 can also be arranged on one longitudinal side of the lower fixing seat 310, such as Figure 4 As shown, the upper fixed block 340 includes a first transverse section 341 and a longitudinal section 342 connected to each other. The first transverse section 341 is arranged above the lower fixed seat 310. The upper workpiece mold 330 is fixed on the first transverse section 341. The fixed block is vertically connected to the support block 350. The upper fixed block 340 also includes a second transverse section 343. The first transverse section, the vertical section and the second transverse section 343 are connected in an "I" shape. The second transverse section 343 is vertically connected to the support block 350. Due to the obstruction of the vertical section, the welding gun 100 cannot weld the corresponding part of the workpiece and the vertical section. Therefore, this embodiment is suitable for workpieces with an opening arranged on one side of the longitudinal direction, such as door handles.

[0027] The above two situations basically meet the welding operations of all tubular components on the market. The support blocks 350 in both situations are detachable structures and are installed separately by pins of different sizes. You can choose to install them according to the actual situation of the workpiece.

[0028] An adjusting bolt 311 is provided on the side of the lower fixing seat, and the adjusting bolt 311 is evenly distributed around the lower fixing seat. The adjusting bolt 311 clamps the lower workpiece mold 320. By adjusting the adjusting bolt 311, the lower workpiece mold 320 can be adjusted in the horizontal and longitudinal directions so that the position of the lower workpiece mold 320 matches the position of the upper workpiece mold 330. A positioning hole is provided on the top of the upper workpiece mold 330, and the upper fixing block 340 is provided with a positioning pin that cooperates with the positioning hole. The positioning is performed by the cooperation of the positioning hole and the positioning pin to ensure that the position remains unchanged. After each workpiece mold is replaced, the stored program can be directly called without re-positioning and adjusting the coordinate position of the program. The fixing block and the upper workpiece mold 330 are fixedly connected by fixing bolts. An air suction hole is provided in the upper workpiece mold 330, and the air suction hole is connected to the vacuum generator. The upper workpiece mold 330 adsorbs and fixes the workpiece therein.

[0029] The lifting cylinder 400 is fixedly installed in the swing member 500. The swing member 500 is a rectangular parallelepiped. The middle of the front and back of the swing member 500 is provided with a rotation hole. A locking plate 510 fixedly connected to the workbench 200 is provided below the workbench 200. The locking plate 510 is provided with a rotation pin 511 matched with the rotation hole. The locking plate 510 is fixedly connected to the swing member 500 through a locking bolt 512. When the locking bolt 512 is loosened, the swing member 500 can rotate around the rotation pin 511. The swing member 500 0 rotates together with the cylinder and the lower fixed seat 310 to adjust the horizontal degree of the lower fixed seat 310 and ensure the parallel cooperation between the lower workpiece die 320 and the upper workpiece die 330. Support columns connected to the bottom of the lower fixed seat 310 are provided on both sides of the lifting cylinder 400. The support columns are fixed in the swing member 500 through shaft sleeves. The support columns rise and fall with the lifting cylinder 400. The support columns make the fixing structure of the lower fixed seat 310 more firm and prevent the lower fixing plate from deflecting around the axis of the lifting cylinder 400.

[0030] The moving device 700 includes a transverse moving device 710, a longitudinal moving device 720, a vertical moving device 730 and a rotating moving device 740. The transverse moving device 710 is arranged on the workbench 200. The longitudinal moving device 720 is vertically connected to the transverse moving device 710 and can slide on the transverse moving device 710. The vertical moving device 730 is vertical to the transverse moving device 710 and the longitudinal moving device 720 respectively. The vertical moving device 730 is connected to the longitudinal moving device 720 and can slide on the longitudinal moving device 720. The rotating moving device 740 is vertically connected to the vertical moving device 730 and can slide on the vertical moving device 730. The transverse moving device 710 includes a transverse moving motor, a transverse moving guide rail and a transverse moving block. The transverse moving motor drives the transverse moving block to slide on the transverse moving guide rail. The longitudinal moving device 720 includes a longitudinal moving motor, a longitudinal moving guide rail and a longitudinal moving block. Moving block, the longitudinal moving motor drives the longitudinal moving block to slide on the longitudinal moving guide rail; the vertical moving device 730 includes a vertical moving motor, a vertical moving guide rail and a vertical moving block, the vertical moving motor drives the vertical moving block to slide on the vertical moving guide rail; the longitudinal moving guide rail is fixed on the transverse moving block, the vertical moving guide rail is fixed on the longitudinal moving block, the rotating moving device 740 is fixed on the vertical moving block, the rotating moving device 740 includes a rotating motor 741 and a driven wheel 742, the rotating motor 741 drives the driven wheel 742 to rotate through the synchronous belt 743, the rotating shaft of the driven wheel 742 is connected to the welding gun 100, the welding gun 100 can realize horizontal, longitudinal and vertical movement and rotate around the axis of the driven wheel 742 driven by the moving device, two driven wheels 742 are set, and two welding guns 100 and tooling fixtures 300 are set accordingly, which can realize double-station synchronous welding operations and improve production efficiency.

[0031] The present invention also includes an adjustment device 600 for manually adjusting the position of the welding gun 100, and the adjustment device 600 includes: a longitudinal adjustment device 610, the longitudinal adjustment device 610 includes a longitudinal fixing plate 611, a longitudinal adjustment plate, a longitudinal adjustment nut 613, a longitudinal adjustment screw 614 and a longitudinal connecting column 615, the longitudinal fixing plate 611 is connected to the longitudinal adjustment plate through the longitudinal connecting column 615, the longitudinal connecting column 615 passes through the longitudinal adjustment plate, and the longitudinal adjustment plate can move along the longitudinal connecting column 615, one end of the longitudinal adjustment screw 614 is fixedly connected to the longitudinal adjustment nut 613, the longitudinal adjustment screw 614 passes through the longitudinal fixing plate 611 and is screwed to the longitudinal adjustment plate, and the longitudinal adjustment screw 614 passes through the longitudinal adjustment plate; a transverse adjustment device 620, the transverse adjustment device 620 includes a transverse fixing plate 621, a transverse adjustment plate 622, a transverse adjustment nut 623, a transverse adjustment screw 624 and a transverse connecting column 625, the transverse fixing plate 621 is connected to the transverse adjustment plate 622 through the transverse connecting column 625 , the transverse connecting column 625 passes through the transverse adjustment plate 622, the transverse adjustment plate 622 can move along the transverse connecting column 625, one end of the transverse adjustment screw 624 is fixedly connected to the transverse adjustment nut 623, the transverse adjustment screw 624 passes through the transverse fixing plate 621 and is screwed to the transverse adjustment plate 622, and the transverse adjustment screw 624 passes through the transverse adjustment plate 622; and a vertical adjustment device 630, the vertical adjustment device 630 includes a vertical fixing plate 631, a vertical adjustment plate 632, and a vertical adjustment nut 633 , vertical adjustment screw 634 and vertical connecting column 635, the vertical fixed plate 631 is connected to the vertical adjustment plate 632 through the vertical connecting column 635, the vertical connecting column 635 passes through the vertical adjustment plate 632, the vertical adjustment plate 632 can move along the vertical connecting column 635, one end of the vertical adjustment screw 634 is fixedly connected to the vertical adjustment nut 633, the vertical adjustment screw 634 passes through the vertical fixed plate 631 and is threadedly connected to the vertical adjustment plate 632, and the vertical adjustment screw 634 passes through the vertical adjustment plate 632.

[0032] Longitudinal adjustment principle: rotating the longitudinal adjustment nut 613 drives the longitudinal adjustment screw 614 to rotate. Since the longitudinal fixing plate 611 is fixed, the longitudinal adjustment nut 613 is hindered by the longitudinal fixing plate 611, and the longitudinal adjustment screw 614 simply rotates. The longitudinal adjustment block is displaced relative to the longitudinal adjustment screw 614 to achieve longitudinal adjustment of the longitudinal adjustment block. The adjustment principles of the transverse adjustment device 620 and the vertical adjustment device 630 are the same as those of the longitudinal adjustment device 610. The other end of the transverse connecting column 625 is fixedly connected to a transverse limit plate for limiting the transverse adjustment distance, and the other end of the vertical connecting column 635 is fixedly connected to a vertical limit plate for limiting the vertical adjustment distance. The transverse adjustment plate 622 is arranged behind the longitudinal adjustment plate and It is fixedly connected to the longitudinal connecting column 615, and the transverse adjustment plate 622 limits the distance of the longitudinal adjustment. A connecting plate is provided on the top of the longitudinal adjustment plate. The two ends of the connecting plate are respectively fixedly connected to the longitudinal fixing plate 611 and the transverse adjustment plate 622 to ensure that the longitudinal fixing plate 611 is fixed during the longitudinal adjustment. The vertical adjustment plate 632 is provided behind the transverse adjustment plate 622, the transverse fixing plate 621 is fixedly connected to the vertical adjustment plate 632, and the vertical fixing plate 631 is fixedly connected to the moving device 700, specifically, the vertical plate is fixedly connected to the rotating shaft of the synchronous wheel, the welding gun 100 is fixedly connected to the longitudinal adjustment plate, and the transverse adjustment device 620, the longitudinal adjustment device 610 and the vertical adjustment device 630 are connected as a whole to drive the welding gun 100 to move.

[0033] Operation process: 1. Install the upper workpiece mold 330 and the lower workpiece mold 320. The upper workpiece mold 330 is positioned by the positioning pin, and the lower workpiece mold 320 cooperates with the upper workpiece mold 330 by adjusting the adjusting bolt 311 and the swinging member 500; 2. Prepare a welding path program. According to the shape and size of the upper workpiece mold 330 and the lower workpiece mold 320, use the CNC programming language to prepare a walking program. Each workpiece only needs to be prepared once and can be directly called later; 3. Adjust the position of the welding gun 100, control the welding gun 100 to move to the starting welding point, and adjust the position of the welding gun 100 through the adjustment device 600 so that it accurately contacts the weld of the workpiece; 4. For welding operation, put the workpiece in and press the start button to automatically weld. After welding is completed, the welding gun 100 will return to the initial coordinate point and wait for the next welding operation.

[0034] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.

Claims

1. A spot-free automatic welding machine, comprising a welding gun (100), a moving device (700), and a workbench (200), characterized in that: The workbench (200) is provided with a fixture (300), the fixture (300) comprising a lower fixed seat (310), a lower workpiece die (320), an upper workpiece die (330), an upper fixed block (340) and a support block (350); the upper fixed block (340) is arranged above the lower fixed seat (310) by being fixedly connected to the support block (350); the lower workpiece die (320) is fixed in the lower fixed seat (310); the upper workpiece die (330) is fixedly connected to the upper fixed block (340); a lifting cylinder (400) for controlling the lifting of the fixed seat is connected to the bottom of the lower fixed seat (310); when the lower fixed seat (310) is lifted, the upper workpiece die (330) and the lower workpiece die (320) clamp the workpiece; and the moving device (700) drives the welding gun (100) to weld along the weld seam of the workpiece; The side of the lower fixing seat (310) is provided with an adjusting bolt (311), the adjusting bolts (311) are evenly distributed around the lower fixing seat (310), the adjusting bolts (311) clamp the lower workpiece mold (320), the top of the upper workpiece mold (330) is provided with a positioning hole, the upper fixing block (340) is provided with a positioning pin that matches the positioning hole, and the upper fixing block (340) is fixedly connected to the upper workpiece mold (330) by fixing bolts; The lifting cylinder (400) is fixedly installed in the swing member (500), and a rotating hole is provided in the middle of the swing member (500). A locking plate (510) fixedly connected to the workbench (200) is provided below the workbench (200), and the locking plate (510) is provided with a rotating pin (511) that cooperates with the rotating hole. The locking plate (510) is fixedly connected to the swing member (500) via a locking bolt (512). When the locking bolt (512) is loosened, the swing member (500) can rotate around the rotating pin (511).

2. The spot-free automatic welding machine according to claim 1, characterized in that: The support block (350) is arranged on one lateral side of the lower fixing seat (310); the upper fixing block (340) is a rectangular parallelepiped; the fixing block and the support block (350) are vertically connected.

3. The spot-free automatic welding machine according to claim 1, characterized in that: The support block (350) is arranged on one longitudinal side of the lower fixed seat (310), and the upper fixed block (340) comprises a first transverse section (341) and a longitudinal section (342) which are connected, and the first transverse section (341) is arranged above the lower fixed seat (310), and the fixed block and the support block (350) are vertically connected.

4. The spot-free automatic welding machine according to claim 2 or 3, characterized in that: The support block (350), the upper fixing block (340) and the lower fixing seat (310) are all provided with water cooling pipes inside.

5. The spot-free automatic welding machine according to claim 1, characterized in that: It also includes an adjustment device (600) for manually adjusting the position of the welding gun (100), the adjustment device (600) comprising: A longitudinal adjustment device (610), the longitudinal adjustment device (610) comprising a longitudinal fixing plate (611), a longitudinal adjustment plate (612), a longitudinal adjustment nut (613), a longitudinal adjustment screw (614) and a longitudinal connecting column (615), the longitudinal fixing plate (611) and the longitudinal adjustment plate (612) being connected via the longitudinal connecting column (615), the longitudinal adjustment plate (612) being movable along the longitudinal connecting column (615), one end of the longitudinal adjustment screw (614) being fixedly connected to the longitudinal adjustment nut (613), the longitudinal adjustment nut (613) passing through the longitudinal fixing plate (611) and being screwed to the longitudinal adjustment plate (612), and the longitudinal adjustment screw (614) passing through the longitudinal adjustment plate (612); A transverse adjustment device (620), the transverse adjustment device (620) comprising a transverse fixing plate (621), a transverse adjustment plate (622), a transverse adjustment nut (623), a transverse adjustment screw (624) and a transverse connecting column (625), the transverse fixing plate (621) and the transverse adjustment plate (622) being connected via the transverse connecting column (625), the transverse adjustment plate (622) being movable along the transverse connecting column (625), one end of the transverse adjustment screw (624) being fixedly connected to the transverse adjustment nut (623), the transverse adjustment screw (624) passing through the transverse fixing plate (621) and being screwed to the transverse adjustment plate (622), and the transverse adjustment screw (624) passing through the transverse adjustment plate (622); and A vertical adjustment device (630), the vertical adjustment device (630) comprising a vertical fixing plate (631), a vertical adjustment plate (632), a vertical adjustment nut (633), a vertical adjustment screw (634) and a vertical connection column (635), the vertical fixing plate (631) and the vertical adjustment plate (632) being connected via the vertical connection column (635), the vertical adjustment plate (632) being movable along the vertical connection column (635), one end of the vertical adjustment screw (634) being fixedly connected to the vertical adjustment nut (633), the vertical adjustment screw (634) passing through the vertical fixing plate (631) and being threadedly connected to the vertical adjustment plate (632), and the vertical adjustment screw (634) penetrating the vertical adjustment plate (632).

6. The spot-free automatic welding machine according to claim 5, characterized in that: The transverse adjustment plate (622) is fixedly connected to the longitudinal connection column (615), the transverse fixing plate (621) is fixedly connected to the vertical adjustment plate (632), the vertical fixing plate (631) is fixedly connected to the moving device (700), and the welding gun (100) is fixedly connected to the longitudinal adjustment plate (612).

7. The spot-free automatic welding machine according to claim 1, characterized in that: The moving device (700) comprises a transverse moving device (710), a longitudinal moving device (720), a vertical moving device (730) and a rotating moving device (740); the transverse moving device (710) is arranged on the workbench (200); the longitudinal moving device (720) is vertically connected to the transverse moving device (710) and can slide on the transverse moving device (710); the vertical moving device (730) is vertically connected to the transverse moving device (710) and the longitudinal moving device (720) respectively; the vertical moving device (730) is connected to the longitudinal moving device (720) and can slide on the longitudinal moving device (720); and the rotating moving device (740) is vertically connected to the vertical moving device (730) and can slide on the vertical moving device (730).

8. The spot-free automatic welding machine according to claim 7, characterized in that: The rotary moving device (740) comprises a rotary motor (741) and a driven wheel (742), two driven wheels (742) are provided, the rotary motor (741) drives the driven wheel (742) to rotate via a synchronous belt (743), and the rotating shaft of the driven wheel (742) is connected to the welding gun (100).

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