Carbon dioxide gas shielded welding machine

Abstract

The utility model discloses a carbon dioxide gas shielded welding machine, which belongs to the technical field of welding machines, and comprises a welding machine shell, a clamping mechanism is arranged on a fixed seat, the clamping mechanism comprises an annular telescopic rod, a connecting block is fixedly connected onto the annular telescopic rod, and the annular telescopic rod is used for enabling the connecting block to be close to or far away from the center. The welding device has the beneficial effects that the clamping mechanism, the butt joint mechanism and the guide mechanism are arranged, through arrangement of an annular telescopic rod, an outer-layer clamping block and an inner-layer clamping block can clamp annular workpieces with different outer diameters, and through cooperation of the welding mechanism and the guide mechanism, the welding efficiency is improved; the welding wire and the welding gun can be stably located at the welding seam position of the inner wall of the annular workpiece, the annular workpiece is clamped and rotated through the clamping mechanism and the butt joint mechanism so that automatic annular welding work can be achieved, multiple welding seams can be welded at a time, the automation degree is high, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of welding machines, in particular to a carbon dioxide gas shielded welding machine. Background Art

[0002] The full name of CO2 shielded welding machine is CO2 gas shielded arc welding. The shielding gas is CO2 (sometimes a mixed gas of CO2+Ar). Since the shielding gas used is cheap, the weld is well formed when short-circuit transition is used, and the use of welding wire containing deoxidizer can obtain a quality weld joint without internal defects. Therefore, this welding method has become one of the most important welding methods for ferrous metal materials.

[0003] After searching the prior art, it was found that in the existing double-shielded welding machines, the welding of the inner wall of the annular workpiece mostly adopts manual welding, and in some carbon dioxide shielded semi-automatic welding machines, it is difficult to clamp the annular workpieces with different outer diameters and inner diameters and to fix the relative weld position of the welding gun and the welding wire, which causes the weld at the welding point to be easily bent and offset, and the welding trajectory cannot be determined, thereby reducing the welding quality. Utility Model Content

[0004] The purpose of the utility model is to provide a carbon dioxide gas shielded welding machine in order to solve the above problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A carbon dioxide gas shielded welding machine, comprising a welding machine housing, a gas cylinder being connected to the rear side of the welding machine housing, a welding machine body and a wire feeding assembly being respectively installed at two sides of the inside of the welding machine housing, a connecting mechanism being arranged in the welding machine housing, the connecting mechanism comprising a base, a fixed seat and a movable seat being arranged at two sides of the top of the base, a clamping mechanism being installed on the fixed seat, the clamping mechanism comprising an annular telescopic rod, a connecting block being fixedly connected to the annular telescopic rod, the annular telescopic rod being used to make the connecting block approach or move away from the center, an outer clamping block being fixedly connected to one side of the connecting block, an inner clamping block for clamping annular workpieces of different outer diameters being slidably connected to the inner side of the outer clamping block, and a welding mechanism being arranged on the clamping mechanism;

[0007] The movable seat is provided with a docking mechanism, and the docking mechanism is installed with a guiding mechanism for guiding the welding wire to the welding position.

[0008] Preferably, the clamping mechanism includes a fixed sleeve, the fixed sleeve is fixedly connected to one side of the top of the base, one side of the fixed sleeve is rotatably connected to a rotating ring, one side of the rotating ring is fixedly connected to a plurality of annularly arranged connecting plates, the connecting plate is slidably connected to a sliding rod, the connecting block is fixedly connected to the opposite end of the plurality of sliding rods, one sliding rod is sleeved in the corresponding connecting plate and one end is fixedly connected to a No. 1 screw rod, and the No. 1 screw rod is threadedly connected to the connecting plate.

[0009] Preferably, the welding mechanism includes a connecting sleeve, which is rotatably connected to the central position inside the fixed sleeve, a welding gun is fixedly connected inside the connecting sleeve, an adjusting block that moves up and down is fixedly connected to the welding gun, a fixing plate is fixedly connected to one side of the fixed sleeve, a No. 2 screw rod is threadedly connected to the fixing plate, an adjusting seat is rotatably connected to the bottom of the No. 2 screw rod, and a groove is opened on the adjusting block for clamping the bottom of the adjusting seat.

[0010] Preferably, the docking mechanism includes a fixed shaft, the fixed shaft is fixedly connected to the top of the movable seat, the bottom of the movable seat is threadedly connected to a screw, the screw is rotatably connected to the base, one side of the fixed shaft is fixedly connected to an electric push rod, the output end of the electric push rod is fixedly connected to a movable sleeve, the movable sleeve is rotatably connected to a docking frame, and the docking frame is slidably connected to a plurality of annular docking rods.

[0011] Preferably, a magnet is fixedly connected to one end of the docking rod opposite to the inner clamping block, a groove matching with the docking rod is opened on the side of the inner clamping block opposite to the docking rod, and an iron block attracted to the magnet is fixedly arranged in the groove.

[0012] Preferably, the guiding mechanism comprises a guiding frame, the guiding frame is fixedly connected to the inside of the fixed shaft, two fixed guiding rollers arranged vertically are rotatably connected in the guiding frame, a lifting seat is slidably connected to a side of the guiding frame away from the fixed guiding roller, and two movable guiding rollers arranged vertically are rotatably connected in the lifting seat.

[0013] Preferably, an adjustment sleeve is fixedly connected to one side of the movable guide roller, a No. 3 screw is threadedly connected to the adjustment sleeve, and the No. 3 screw is rotatably connected to the side position of the guide frame.

[0014] The beneficial effects are: a clamping mechanism, a docking mechanism and a guiding mechanism are provided, and through the provision of an annular telescopic rod, the outer clamping block and the inner clamping block can clamp annular workpieces of different outer diameters, and through the cooperation of the welding mechanism and the guiding mechanism, the welding wire and the welding gun can be stably located at the weld position of the inner wall of the annular workpiece, the annular workpiece is clamped and rotated by the clamping mechanism and the docking mechanism to realize automatic ring welding, and multiple welds can be welded at one time, with a high degree of automation and strong practicality.

[0015] The additional technical features and advantages of the present invention will be more clearly explained in the following description, or can be understood through the specific practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0017] Figure 1 It is a schematic diagram of a carbon dioxide gas shielded welding machine described in the utility model;

[0018] Figure 2 It is a front sectional view of a carbon dioxide gas shielded welding machine described in the utility model;

[0019] Figure 3 It is a cross-sectional view of the position of the inner layer clamping block of a carbon dioxide gas shielded welding machine described in the utility model;

[0020] Figure 4 It is a schematic diagram of the internal connection of a welding machine housing of a carbon dioxide gas shielded welding machine described in the utility model;

[0021] Figure 5 This is a schematic diagram of the connection between the connecting mechanism and the clamping mechanism of a carbon dioxide gas shielded welding machine described in the utility model;

[0022] Figure 6 It is a schematic diagram of the connection between the clamping mechanism and the welding mechanism of a carbon dioxide gas shielded welding machine described in the utility model;

[0023] Figure 7 It is a schematic diagram of the welding mechanism of a carbon dioxide gas shielded welding machine described in the utility model;

[0024] Figure 8 It is a schematic diagram of the connection mechanism and the docking mechanism of a carbon dioxide gas shielded welding machine described in the utility model;

[0025] Fig. 9It is a schematic diagram of the relative positions of the docking mechanism and the guiding mechanism of a carbon dioxide gas shielded welding machine described in the utility model;

[0026] Fig.10 It is a schematic diagram of the cooperation between the docking mechanism and the guiding mechanism of a carbon dioxide gas shielded welding machine described in the utility model;

[0027] Fig.11 The utility model is a schematic diagram of the connection between a docking frame and a docking rod of a carbon dioxide gas shielded welding machine.

[0028] The reference numerals are as follows: 101, welding machine housing; 102, closed door; 103, gas cylinder; 104, welding machine body; 105, wire feeding assembly; 201, base; 202, fixed seat; 203, movable seat; 204, screw; 301, fixed sleeve; 302, rotating ring; 303, motor; 304, belt; 305, connecting plate; 306, sliding rod; 307, annular telescopic rod; 308, No. 1 screw rod; 309, connecting block; 310, outer clamping block; 311, outer clamping block; 312, outer clamping block; 313, outer clamping block; 314, outer clamping block; 315, outer clamping block; 316, outer clamping block; 317, outer clamping block; 318, outer clamping block; 319, outer clamping block; 320, outer clamping block; 321, outer clamping block; 322, outer clamping block; 323, outer clamping block; 324, outer clamping block; 325, outer clamping block; 326, outer clamping block; 327, outer clamping block; 328, outer clamping block; 329, outer clamping block; 330, outer clamping block; 331, outer clamping block; 332, outer clamping block; 333, outer clamping block; 334, outer clamping block; 335, outer clamping block; 336, outer clamping block; 337, outer clamping block; 338, outer clamping block; 339, outer clamping block; 340, outer clamping block; 341, outer clamping block; 342, outer clamping block; 343, outer clamping block; 344, outer clamping block; 11. Inner clamping block; 401. Connecting sleeve; 402. Welding gun; 403. Fixed plate; 404. Screw rod No. 2; 405. Adjusting seat; 406. Adjusting block; 407. Electric wire; 501. Fixed shaft; 502. Electric push rod; 503. Moving sleeve; 504. Docking frame; 505. Docking rod; 506. Magnet; 601. Guide frame; 602. Fixed guide roller; 603. Lifting seat; 604. Moving guide roller; 605. Adjusting sleeve; 606. Screw rod No. 3. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0031] The utility model is further described below in conjunction with the accompanying drawings:

[0032] like Figure 1 — Fig.11As shown, a carbon dioxide gas shielded welding machine comprises a welding machine housing 101, a closed door 102 is hingedly connected to the front side of the welding machine housing 101, a gas cylinder 103 is connected to the rear side of the welding machine housing 101, a welding machine body 104 and a wire feeding assembly 105 are respectively installed at both sides of the inside of the welding machine housing 101, a connecting mechanism is arranged in the welding machine housing 101, the connecting mechanism comprises a base 201, a fixed seat 202 and a movable seat 203 are arranged at both sides of the top of the base 201, a clamping mechanism is installed on the fixed seat 202, the clamping mechanism comprises an annular telescopic rod 307, a connecting block 309 is connected to the annular telescopic rod 307 by bolts, the annular telescopic rod 307 is used to make the connecting block 309 approach or move away from the center, an outer clamping block 310 is welded on one side of the connecting block 309, The inner side of the outer clamping block 310 is slidably connected to an inner clamping block 311 for clamping annular workpieces of different outer diameters. Protrusions are provided on the opposite surfaces of the outer clamping block 310 and the inner clamping block 311. The protrusions of the outer clamping block 310 and the inner clamping block 311 are slidably connected to each other, so that the inner clamping block 311 can still move left and right with the workpiece after clamping the workpiece. After the inner clamping block 311 clamps the annular workpiece, the inner clamping block 311 can move left and right relative to the outer clamping block 310 through the action of the docking mechanism to achieve welding at different positions and weld multiple welds at one time. A welding mechanism is provided on the clamping mechanism, and a docking mechanism is provided on the movable seat 203. A guiding mechanism for guiding the welding wire to the welding position is installed on the docking mechanism.

[0033] In this embodiment, the clamping mechanism includes a fixing sleeve 301, which is connected to one side of the top of the base 201 by bolts, and a rotating ring 302 is rotatably connected to one side of the fixing sleeve 301. A motor 303 is connected to the welding machine housing 101 by bolts, and a belt 304 is sleeved on the output shaft of the motor 303. The other end of the belt 304 is sleeved on the rotating ring 302. One side of the rotating ring 302 is connected to a plurality of annularly arranged connecting plates 305 by bolts, and a sliding rod 306 is slidably connected to the connecting plate 305. The connecting block 309 is connected to a plurality of At one end opposite to a slide bar 306, a slide bar 306 is sleeved in the corresponding connecting plate 305 and one end is welded with a No. 1 screw rod 308, which is threadedly connected to the connecting plate 305. By rotating the No. 1 screw rod 308, the No. 1 screw rod 308 pushes and pulls the annular telescopic rod 307 through the slide bar 306 connected thereto, so that the distance between each connecting block 309 and the center of the annular telescopic rod 307 is synchronously expanded or reduced, so that the outer clamping block 310 and the inner clamping block 311 can adapt to annular workpieces with different outer diameters and perform stable clamping and positioning.

[0034] In this embodiment, the welding mechanism includes a connecting sleeve 401, which is rotatably connected to the center position of the fixed sleeve 301. A welding gun 402 is connected to the connecting sleeve 401 by bolts, and an adjustment block 406 that moves up and down is connected to the welding gun 402 by bolts. A fixing plate 403 is connected to one side of the fixing sleeve 301 by bolts, and a second screw rod 404 is threadedly connected to the fixing plate 403. The bottom of the second screw rod 404 is rotatably connected to an adjustment seat 405, and a hole for clamping the adjustment seat 405 is opened on the adjustment block 406. The bottom groove, the tail of the welding gun 402 is plugged with a flexible wire 407, the wire 407 is connected to the welding machine body 104, after the annular workpiece is clamped, by rotating the second screw rod 404, the second screw rod 404 drives the adjustment block 406 to move up and down through the adjustment seat 405, so that the welding gun 402 as a whole rotates around the connecting sleeve 401 as the axis, and the welding head moves downward, so that the welding head of the welding gun 402 is close to the weld position inside the annular workpiece, and the position of the welding head can be fixed and kept stable during welding, so as to realize automatic welding.

[0035] In this embodiment, the docking mechanism includes a fixed shaft 501, which is connected to the top of the movable seat 203 by bolts, and the bottom of the movable seat 203 is threadedly connected with a screw 204, and the screw 204 is rotatably connected to the base 201. One side of the fixed shaft 501 is connected with an electric push rod 502 by bolts, and the output end of the electric push rod 502 is connected with a movable sleeve 503 by bolts. The movable sleeve 503 is slidably connected to the fixed shaft 501, and a docking frame 504 is rotatably connected to the movable sleeve 503. A plurality of annular docking rods 505 are slidably connected to the docking frame 504. The movable seat 203 can be moved left and right as a whole through the screw 204, which is convenient for placing the annular workpiece into the inner position of the inner layer clamping block 311, and through the setting of the electric push rod 502, the electric push rod 502 drives the movable sleeve 503 on the fixed shaft 501 so that the workpiece can move left and right during the welding process, so as to realize welding of multiple welds at one time, thereby further improving the welding efficiency.

[0036] In this embodiment, a magnet 506 is fixedly connected to the end of the docking rod 505 opposite to the inner clamping block 311, and a groove matching the docking rod 505 is opened on the side of the inner clamping block 311 opposite to the docking rod 505, and an iron block attracted to the magnet 506 is fixedly arranged in the groove. Through the sliding connection between the outer clamping block 310 and the inner clamping block 311, when the magnet 506 is docked in the groove of the inner clamping block 311, when the docking frame 504 moves left and right, the docking rod 505 can drive the inner clamping block 311 to move left and right through the magnet 506, and when the inner clamping block 311 moves to the maximum position offset from the outer clamping block 310, the docking frame 504 continues to move, which can enable the docking rod 505 to be separated from the inner clamping block 311, thereby conveniently removing the annular workpiece.

[0037] In this embodiment, the guiding mechanism includes a guide frame 601, which is connected to the inside of the fixed shaft 501 by bolts. Two fixed guide rollers 602 arranged vertically are rotatably connected in the guide frame 601. A lifting seat 603 is slidably connected to the side of the guide frame 601 away from the fixed guide roller 602. Two movable guide rollers 604 arranged vertically are rotatably connected in the lifting seat 603. The lifting seat 603 is capable of moving up and down and is used to guide the welding wire to the inner wall of the annular workpiece with different inner diameters. An adjusting sleeve 605 is welded on one side of the movable guide roller 604. A No. 3 screw rod 606 is threadedly connected to the adjusting sleeve 605. The No. 3 screw rod 606 is rotatably connected to the side position of the guide frame 601 and drives the movable guide roller 604 to move up and down through the lifting seat 603. After the wire feeding assembly 105 introduces the welding wire from the fixed guide roller 602, it passes through the movable guide roller 604 to form an oblique line, thereby guiding the welding wire to the welding position of the inner wall of the annular workpiece to realize automatic wire feeding during welding.

[0038] Working principle: When the device is in use, the closed door 102 is opened, and the annular workpiece to be welded is placed in the welding machine housing 101. In the initial state, the movable seat 203 is located at one end of the base 201, and the staff can place the annular workpiece from the gap between the base 201 and the movable seat 203 into the inner side of the inner clamping block 311. For different annular workpieces, the staff rotates the No. 1 screw rod 308, and the No. 1 screw rod 308 pushes and pulls the annular telescopic rod 307 through the sliding rod 306 connected thereto, so that the distance between each connecting block 309 and the center of the annular telescopic rod 307 is synchronously expanded or reduced, so that the outer clamping block 310 and the inner clamping block 311 can adapt to annular workpieces with different outer diameters, and can be stably clamped and positioned. After the workpiece is clamped and positioned, the welding head of the welding gun 402 needs to be positioned close to the weld. By rotating the No. 2 screw rod 404, the No. 2 screw rod 404 drives the adjusting block 406 to move up and down through the adjusting seat 405, so that the welding gun 402 as a whole rotates around the connecting sleeve 401 as the axis, and the welding head moves downward, so that the welding head of the welding gun 402 can be close to the weld position of the inner wall of the annular workpiece, and the position of the welding head can be fixed and kept stable during welding, so as to realize automatic welding. Then, the screw rod 204 is rotated, and the screw rod 204 drives the moving seat 203 to approach the position of the inner layer clamping block 311. At the same time, the staff adjusts the angle of the docking frame 504 so that the docking rod 505 can be inserted into the groove of the inner layer clamping block 311, and then the No. 3 screw rod 606 is rotated. , the third screw rod 606 drives the lifting seat 603 to move up and down, and the lifting seat 603 drives the movable guide roller 604 to move up and down, and the welding wire passes through the fixed guide roller 602 and the movable guide roller 604, so that the wire feeding assembly 105 introduces the welding wire from the fixed guide roller 602 to form an oblique line, thereby guiding the welding wire to the welding position of the inner wall of the annular workpiece, so that the welding wire and the welding head of the welding gun 402 are close to each other. After the preparation is completed, the closed door 102 is closed, the gas cylinder 103, the welding machine body 104, the wire feeding assembly 105 and the motor 303 are turned on, and the welding work is started. During welding, the motor 303 drives the rotating ring 302 to rotate through the belt 304, and the rotating ring 302 is connected to the connecting plate 305, the sliding rod 306, and the annular telescopic rod 3 07 and the connection block 309, thereby driving the outer clamping block 310 and the inner clamping block 311 to rotate, so that the welding gun 402 performs ring welding on the inner wall of the annular workpiece. When one weld is completed, the electric push rod 502 pushes and pulls the movable sleeve 503, and the movable sleeve 503 drives the docking frame 504 and the docking rod 505 to move left and right. The magnet 506 on the docking rod 505 drives the inner clamping block 311 to move through the magnetic attraction with the inner clamping block 311, so as to weld multiple welds. When the welding is completed, the closed door 102 is opened, the screw 204 is rotated to move the movable seat 203 to one side, and the No. 1 screw rod 308 is rotated to release the inner clamping block 311 from clamping the workpiece, so that the annular workpiece can be taken out and the welding is completed.

[0039] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A carbon dioxide gas shielded welding machine, comprising a welding machine housing (101), a gas cylinder (103) being connected to the rear side of the welding machine housing (101), a welding machine body (104) and a wire feeding assembly (105) being respectively installed at two sides of the welding machine housing (101), characterized in that: A connecting mechanism is arranged in the welding machine housing (101), the connecting mechanism comprising a base (201), a fixed seat (202) and a movable seat (203) are arranged at both sides of the top of the base (201), a clamping mechanism is installed on the fixed seat (202), the clamping mechanism comprises an annular telescopic rod (307), a connecting block (309) is fixedly connected to the annular telescopic rod (307), the annular telescopic rod (307) is used to make the connecting block (309) approach or move away from the center, an outer clamping block (310) is fixedly connected to one side of the connecting block (309), an inner clamping block (311) for clamping annular workpieces with different outer diameters is slidably connected to the inner side of the outer clamping block (310), and a welding mechanism is arranged on the clamping mechanism; The movable seat (203) is provided with a docking mechanism, and a guiding mechanism for guiding the welding wire to a welding position is installed on the docking mechanism.

2. A carbon dioxide gas shielded welding machine according to claim 1, characterized in that: The clamping mechanism comprises a fixing sleeve (301), wherein the fixing sleeve (301) is fixedly connected to one side of the top of the base (201), one side of the fixing sleeve (301) is rotatably connected to a rotating ring (302), one side of the rotating ring (302) is fixedly connected to a plurality of annularly arranged connecting plates (305), a sliding rod (306) is slidably connected to the connecting plate (305), the connecting block (309) is fixedly connected to the opposite end of the plurality of sliding rods (306), one of the sliding rods (306) is sleeved in the corresponding connecting plate (305) and one end of the sliding rod is fixedly connected to a first screw rod (308), and the first screw rod (308) is threadedly connected to the connecting plate (305).

3. A carbon dioxide gas shielded welding machine according to claim 2, characterized in that: The welding mechanism comprises a connecting sleeve (401), wherein the connecting sleeve (401) is rotatably connected to the center position inside the fixing sleeve (301), a welding gun (402) is fixedly connected inside the connecting sleeve (401), an adjusting block (406) that moves up and down is fixedly connected to the welding gun (402), a fixing plate (403) is fixedly connected to one side of the fixing sleeve (301), a second screw rod (404) is threadedly connected to the fixing plate (403), an adjusting seat (405) is rotatably connected to the bottom of the second screw rod (404), and a groove for clamping the bottom of the adjusting seat (405) is opened on the adjusting block (406).

4. A carbon dioxide gas shielded welding machine according to claim 1, characterized in that: The docking mechanism comprises a fixed shaft (501), the fixed shaft (501) is fixedly connected to the top of the movable seat (203), the bottom of the movable seat (203) is threadedly connected to a screw rod (204), the screw rod (204) is rotatably connected to the base (201), one side of the fixed shaft (501) is fixedly connected to an electric push rod (502), the output end of the electric push rod (502) is fixedly connected to a movable sleeve (503), the movable sleeve (503) is rotatably connected to a docking frame (504), and the docking frame (504) is slidably connected to a plurality of annularly arranged docking rods (505).

5. A carbon dioxide gas shielded welding machine according to claim 4, characterized in that: A magnet (506) is fixedly connected to one end of the docking rod (505) opposite to the inner layer clamping block (311), and a groove matching with the docking rod (505) is opened on the side of the inner layer clamping block (311) opposite to the docking rod (505), and an iron block attracted to the magnet (506) is fixedly arranged in the groove.

6. A carbon dioxide gas shielded welding machine according to claim 4, characterized in that: The guide mechanism comprises a guide frame (601), wherein the guide frame (601) is fixedly connected to the inside of the fixed shaft (501), and two fixed guide rollers (602) arranged vertically are rotatably connected inside the guide frame (601), and a lifting seat (603) is slidably connected to a side of the guide frame (601) away from the fixed guide rollers (602), and two movable guide rollers (604) arranged vertically are rotatably connected inside the lifting seat (603).

7. A carbon dioxide gas shielded welding machine according to claim 6, characterized in that: An adjustment sleeve (605) is fixedly connected to one side of the movable guide roller (604), a third screw rod (606) is threadedly connected to the adjustment sleeve (605), and the third screw rod (606) is rotatably connected to the side position of the guide frame (601).

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