Wire feeding mechanism for welding gun

Abstract

The utility model discloses a wire feeding mechanism for a welding gun. The wire feeding mechanism comprises a main body, a welding wire driving assembly, a welding wire pressing force adjusting assembly and a welding wire pressing structure assembly are arranged on the main body; and the conductor is connected into the whole welding loop to realize the transmission of welding current. And welding wires are output for welding operation. And welding protective gas is conveyed for welding operation. And the pressing force of the wire feeding wheel on the welding wire can be adjusted. The welding wire guide pipe is positioned on the body, welding wires are conveyed more stably, and the welding wire guide pipe is easy to replace. The technology integrates a mechanical air valve. The structure is compact, the size is small, and the labor intensity can be effectively reduced when the device is used on a welding gun.

Description

TECHNICAL FIELD

[0001] The utility model relates to the fusion welding of welding technology field, specifically relates to the wire feeding mechanism for welding gun, is generally applied to handheld type welding gun, such as wire drawing gun, push-pull wire gun. BACKGROUND

[0002] The wire feeding mechanism is generally used on the welding machine or handheld type welding gun, such as wire drawing gun, push-pull wire gun. The utility model is used on the welding gun, especially handheld type welding gun.

[0003] As handheld type tool, the convenience of use should be considered when developing this type of product, such as small size, light weight, simple operation, wide application scene etc.

[0004] The current different manufacturers of this type of technology has certain limitations.

[0005] 1. Large size is not conducive to the welding of some positions;

[0006] 2. Heavy weight, high labor intensity;

[0007] 3. Complex operation (mainly reflected in the compression of welding wire and the adjustment of compression force);

[0008] 4. Some scenes are not convenient to use, and are not suitable for application on the welding machine without electromagnetic valve. INVENTION CONTENTS

[0009] In view of the problems existing in the prior art, the utility model provides a wire feeding mechanism for welding gun, which can adjust the compression force of the wire feeding wheel on the welding wire. The welding wire guide tube is positioned on the main body, the welding wire transmission is more stable, and the welding wire guide tube is easy to replace. The mechanical type air valve is integrated. The structure is compact, the volume is small, and the labor intensity can be effectively reduced when used on the welding gun.

[0010] The technical scheme of the utility model is: a wire feeding mechanism for welding gun, comprising a main body;The main body is provided with a welding wire driving assembly, a welding wire compression force adjusting assembly and a welding wire compression structure assembly;

[0011] The welding wire driving assembly comprises a driving wheel and a driving motor;The driving wheel is arranged above the main body, the outer circumferential surface of the driving wheel is provided with a driving wheel clamping groove capable of clamping the welding wire, the bottom of the driving wheel is connected with the driving motor, and the driving motor drives the welding wire in the driving wheel clamping groove to move;

[0012] The main body is provided with a welding wire compression force adjusting assembly mounting hole, and the welding wire compression force adjusting assembly is mounted in the welding wire compression force adjusting assembly mounting hole;

[0013] The welding wire pressure adjusting assembly includes a welding wire pressure adjusting knob, a screw rod and a welding wire pressure adjusting spring; the welding wire pressure adjusting spring is installed in the welding wire pressure adjusting assembly mounting hole, the first end of the welding wire pressure adjusting spring is connected with the first end of the screw rod, the screw rod body is connected with the welding wire pressure adjusting assembly mounting hole through threads, and the second end of the screw rod is connected with the welding wire pressure adjusting knob; the screw rod can be moved back and forth in the welding wire pressure adjusting assembly mounting hole by rotating the welding wire pressure adjusting knob, and the welding wire pressure adjusting spring is moved back and forth in the welding wire pressure adjusting assembly mounting hole.

[0014] The welding wire pressure adjusting assembly includes a welding wire pressure adjusting knob, a screw rod and a welding wire pressure adjusting spring; the welding wire pressure adjusting spring is installed in the welding wire pressure adjusting assembly mounting hole, the first end of the welding wire pressure adjusting spring is connected with the first end of the screw rod, the screw rod body is connected with the welding wire pressure adjusting assembly mounting hole through threads, and the second end of the screw rod is connected with the welding wire pressure adjusting knob; the screw rod can be moved back and forth in the welding wire pressure adjusting assembly mounting hole by rotating the welding wire pressure adjusting knob, and the welding wire pressure adjusting spring is moved back and forth in the welding wire pressure adjusting assembly mounting hole.

[0015] Further, the main body is provided with a gas channel extending through the whole main body along the length direction of the main body;

[0016] The main body is further provided with a gas valve structure assembly mounting hole, the gas valve structure assembly mounting hole is communicated with the gas channel, the gas valve structure assembly mounting hole is installed with a gas valve structure assembly, and the gas valve structure assembly can open or close the gas channel.

[0017] Further, the gas valve structure assembly includes a gas valve cover, a gas valve spring and a gas valve stem;

[0018] The gas valve structure assembly mounting hole includes an upper large cylindrical hole, a middle transition step surface and a lower small cylindrical hole;

[0019] The cover cylindrical surface of the gas valve cover top can be installed and positioned with interference fit on the top of the large cylindrical hole; a first annular groove for installing a sealing ring is formed on the outer circumferential surface of the gas valve cover, and after the sealing ring is installed in the first annular groove, the first annular groove can be sealed with interference fit on the large cylindrical hole;

[0020] A second annular groove for installing a sealing ring is formed on the top of the rod body of the gas valve stem, and after the sealing ring is installed in the second annular groove, the second annular groove can be sealed with interference fit on the large cylindrical hole; a third annular groove for installing a sealing ring and a fourth annular groove for installing a sealing ring are formed on the lower end of the rod body of the gas valve stem, and after the sealing rings are installed in the third annular groove and the fourth annular groove, the third annular groove and the fourth annular groove can be sealed with interference fit on the small cylindrical hole; the bottom of the rod body of the gas valve stem protrudes from the gas valve structure assembly mounting hole;

[0021] A valve rod blind hole is formed on the top end of the gas valve stem, a cover blind hole is formed on the bottom end of the gas valve cover, and the gas valve spring is installed at both ends of the valve rod blind hole and the cover blind hole respectively; when the gas valve stem is not under stress, the gas valve spring supports the downward movement of the gas valve stem to seal the gas passage; when the bottom of the rod body of the gas valve stem is under stress and moves upward, the gas valve stem opens the gas passage.

[0022] Further, a wire feeding pipe positioning structure assembly mounting hole is formed on the main body, and a wire feeding pipe positioning structure assembly is installed in the wire feeding pipe positioning structure assembly mounting hole;

[0023] The wire feeding pipe positioning structure assembly comprises a guide rod, a guide rod fixing screw, a positioning cap and a positioning cap fixing screw;

[0024] The guide rod is installed in the wire feeding pipe positioning structure assembly mounting hole and fixed by the guide rod fixing screw; one end of the welding wire guide pipe is fixedly connected with the positioning cap by screw threads, and then the other end of the welding wire guide pipe is inserted from one end of the guide rod until the positioning cap reaches the corresponding matching position on the guide rod, and then the positioning cap is fixed on the guide rod by the positioning cap fixing screw.

[0025] Further, the first end of the screw rod is a screw rod boss capable of being connected with the first end of the welding wire pressing force adjusting spring, a screw rod outer thread capable of being connected with the welding wire pressing force adjusting assembly mounting hole is formed in the middle of the screw rod body, and a screw rod limiting plane capable of being connected with the welding wire pressing force adjusting knob is formed on the second end of the screw rod.

[0026] The utility model discloses a beneficial effect is: provide for the wire feeding mechanism on the welding torch, as the conductor access whole welding circuit, realize the transmission of welding current. The welding wire is exported for the welding operation. The welding protective gas is transported for the welding operation. The pressure of wire feeding wheel to welding wire can be adjusted. The welding wire guide pipe is positioned on the main part, and welding wire transmission is more stable, and the welding wire guide pipe is easy to replace. The technology integrates the mechanical air valve. Compact structure, small, use on the welding torch can effectively reduce the labor intensity. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is whole structure schematic diagram for wire feeding mechanism on the welding torch;

[0028] Figure 2 It is welding wire pressure assembly assembly drawing;

[0029] Figure 3 It is welding wire pressure adjustment assembly section view;

[0030] Figure 4 It is welding wire pressure adjustment assembly explosion view;

[0031] Figure 5 It is pressure arm structure diagram;

[0032] Figure 6 It is pressure arm structure diagram;

[0033] Figure 7 It is elastic sheet structure diagram;

[0034] Figure 8 It is screw structure diagram;

[0035] Figure 9 It is open pressure arm schematic diagram;

[0036] Figure 10 It is closed pressure arm schematic diagram;

[0037] Figure 11 It is welding wire in drive wheel slot schematic diagram;

[0038] Figure 12 It is pressure arm and elastic sheet schematic diagram;

[0039] Figure 13 It is air valve structure assembly explosion view;

[0040] Figure 14 It is air valve structure assembly section view;

[0041] Figure 15 It is air valve structure assembly mounting hole structure diagram;

[0042] Figure 16 It is air valve spring is in compression state, and valve rod is under the spring elasticity and makes gas passage closed schematic diagram;

[0043] Figure 17 For pressing the valve stem, the air valve spring continues to be compressed, and the gas passage is opened;

[0044] Figure 18 For the air valve cover structure diagram;

[0045] Figure 19 For the valve stem structure diagram;

[0046] Figure 20 For the gas passage schematic diagram;

[0047] Figure 21 For the wire tube positioning structure assembly section view.

[0048] In the figure: 1 is a welding wire, 2 is a wire tube, 3 is a welding wire guide pipe, 4 is a clamp, 5 is a pressing wheel, 6 is a driving wheel, 7 is a driving motor;

[0049] 301 is an air valve cover, 302 is an air valve spring, and 303 is an air valve stem;

[0050] 205 is a gas passage;

[0051] 401 is a pressing arm rotating fixing screw, 402 is a pressing arm, 403 is a spring fixing screw, and 404 is a spring;

[0052] 501 is a welding wire pressing force adjusting spring, 502 is a screw rod, and 503 is a welding wire pressing force adjusting knob;

[0053] 601 is a guide rod, 602 is a guide rod fixing screw, 603 is a positioning cap fixing screw, and 604 is a positioning cap;

[0054] 701 is a large cylindrical hole, 702 is a transition step surface, 703 is a small cylindrical hole, and 704 is a sealing ring;

[0055] 801 is a first annular groove, 802 is a cover blind hole, 803 is a cover cylindrical surface, 804 is a valve stem blind hole, 805 is a second annular groove, 806 is a third annular groove, and 807 is a fourth annular groove;

[0056] 903 is a thrust arm, and 904 is a spring limiting stop;

[0057] 1001 is a screw rod boss, 1002 is a screw rod, and 1003 is a screw rod limiting plane.

[0058] A-pressing spring. DETAILED DESCRIPTION

[0059] The utility model will be further described below in combination with the drawings.

[0060] As Figure 1As shown, the wire feeding mechanism used on the welding gun includes a main body. The main body is provided with a welding wire driving assembly, a welding wire pressure adjusting assembly, a welding wire pressure structure assembly, a gas valve structure assembly and a wire feeding tube positioning structure assembly.

[0061] The welding wire driving assembly includes a driving wheel 6 and a driving motor 7. The driving wheel 6 is arranged above the main body, and the outer circumferential surface of the driving wheel 6 is processed with a driving wheel clamping groove capable of clamping the welding wire. The bottom of the driving wheel 6 is connected to the driving motor 7, which drives the rotation and in turn drives the movement of the welding wire in the driving wheel clamping groove.

[0062] As shown, Figures 2-12 The main body is provided with a welding wire pressure adjusting assembly mounting hole, and the welding wire pressure adjusting assembly is mounted in the welding wire pressure adjusting assembly mounting hole.

[0063] The welding wire pressure adjusting assembly includes a welding wire pressure adjusting knob 503, a screw rod 502 and a welding wire pressure adjusting spring 501. The welding wire pressure adjusting spring 501 is mounted in the welding wire pressure adjusting assembly mounting hole, and the first end of the welding wire pressure adjusting spring 501 is connected to the first end of the screw rod 502. The body of the screw rod 502 is connected to the welding wire pressure adjusting assembly mounting hole through threads, and the second end of the screw rod 502 is connected to the welding wire pressure adjusting knob 503. By rotating the welding wire pressure adjusting knob 503, the screw rod 502 can be moved back and forth in the welding wire pressure adjusting assembly mounting hole, and in turn the welding wire pressure adjusting spring 501 can be moved back and forth in the welding wire pressure adjusting assembly mounting hole. Preferably, the first end of the screw rod 502 is a screw rod boss 1001 capable of being connected to the first end of the welding wire pressure adjusting spring 501. The middle part of the body of the screw rod 502 is processed with a screw rod external thread 1002 capable of being connected to the welding wire pressure adjusting assembly mounting hole. The second end of the screw rod 502 is processed with a screw rod limiting plane 1003 capable of being connected to the welding wire pressure adjusting knob 503.

[0064] The welding wire pressing structure assembly comprises a pressing arm 402, a pressing wheel 5, an elastic sheet 404, a pressing arm rotation fixing screw 401 and an elastic sheet fixing screw 403. The first end of the elastic sheet 404 is fixed to the main body by the elastic sheet fixing screw 403. The middle part of the pressing arm 402 is fixed to the main body by the pressing arm rotation fixing screw 401, and the pressing arm 402 can rotate around the pressing arm rotation fixing screw 401. The first end of the pressing arm 402 is connected to the second end of the welding wire pressing force adjusting spring 501, and the second end of the pressing arm 402 is provided with the pressing wheel 5. The second end of the pressing arm 402 is also provided with a thrust arm 903, and the bottom of the thrust arm 903 is provided with an elastic sheet limiting stop 904 which can be matched and connected with the second end of the elastic sheet 404. When the welding wire is in a non-pressing state, the welding wire is clamped in the driving wheel clamping groove of the driving wheel 6 and moves with the driving wheel, and the two ends of the pressing arm 402 are supported and fixed by the welding wire pressing force adjusting spring 501 and the elastic sheet 404. When the welding wire needs to be pressed, press the elastic sheet 404 to make the second end of the elastic sheet 404 disengage from the elastic sheet limiting stop 904, and the second end of the pressing arm 402 rotates towards the driving wheel 6 under the elastic force of the welding wire pressing force adjusting spring 501 until the pressing wheel 5 contacts the welding wire clamped in the driving wheel 6 and presses the welding wire.

[0065] As shown in Figures 13-20 The main body is provided with a gas passage 205 extending through the whole main body along the length direction of the main body.

[0066] The main body is also provided with a gas valve structure assembly mounting hole which is in communication with the gas passage 205, and a gas valve structure assembly is mounted in the gas valve structure assembly mounting hole. The gas valve structure assembly can open or close the gas passage 205.

[0067] The gas valve structure assembly comprises a gas valve cover 301, a gas valve spring 302 and a gas valve stem 303.

[0068] The gas valve structure assembly mounting hole comprises an upper large cylindrical hole 701, a middle transition step surface 702 and a lower small cylindrical hole 703.

[0069] The cover cylindrical surface 803 at the top of the gas valve cover 301 can be installed and positioned in interference fit with the top of the large cylindrical hole 701. A first annular groove 801 for installing a sealing ring is formed on the outer circumferential surface of the gas valve cover 301, and after a sealing ring is installed in the first annular groove 801, the first annular groove 801 can be sealed in interference fit with the large cylindrical hole 701.

[0070] The rod body top of the gas valve stem 303 is provided with a second annular groove 805 for installing a sealing ring, which can be sealed with interference fit with the large cylindrical hole 701 after installing the sealing ring. The lower end of the rod body of the gas valve stem 303 is provided with a third annular groove 806 and a fourth annular groove 807 for installing sealing rings, which can be sealed with interference fit with the small cylindrical hole 703 after installing the sealing rings. The bottom of the rod body of the gas valve stem 303 protrudes from the gas valve structure assembly mounting hole.

[0071] The top end of the gas valve stem 303 is provided with a stem blind hole 804, and the bottom end of the gas valve cover 301 is provided with a cover blind hole 802. The gas valve spring 302 is installed at both ends of the stem blind hole 804 and the cover blind hole 802, respectively. When the gas valve stem 303 is not under stress, the gas valve spring 302 supports the downward movement of the gas valve stem 303 to seal the gas passage 205. When the bottom of the rod body of the gas valve stem 303 is under stress and moves upward, the gas valve stem 303 opens the gas passage 205.

[0072] As shown in Figure 21 The main body is provided with a wire feeding pipe positioning structure assembly mounting hole, and a wire feeding pipe positioning structure assembly is installed in the wire feeding pipe positioning structure assembly mounting hole.

[0073] The wire feeding pipe positioning structure assembly includes a guide rod 601, a guide rod fixing screw 602, a positioning cap 604, and a positioning cap fixing screw 603.

[0074] The guide rod 601 is installed in the wire feeding pipe positioning structure assembly mounting hole and fixed by the guide rod fixing screw 602. One end of the welding wire guide pipe 3 is threadedly connected with the positioning cap 604, and then the other end of the welding wire guide pipe 3 is inserted from one end of the guide rod 601 until the positioning cap 604 reaches the corresponding matching position on the guide rod 601, and then the positioning cap 604 is fixed on the guide rod 601 by the positioning cap fixing screw 603.

[0075] In use, check whether the compression arm is in a compressed state or a closed state. If it is in a closed state, open the compression arm. At this time, the elastic sheet will pop up and be clamped into the elastic sheet limiting stop on the bottom surface of the compression arm. Then the welding wire is introduced through the wire feeding pipe and passes through the drive wheel to the gun neck end. The drive wheel is installed on the motor, and the motor works. The welding wire is continuously output.

[0076] When the welding wire needs to be pressed, the check confirms that the welding wire is in the groove on the driving wheel, the elastic sheet is pressed, at this time the elastic sheet is out of the stop position on the pressing arm, the pressing arm will rotate a certain angle around its positioning shaft under the action of the spring force, when the pressing wheel on the pressing arm contacts the welding wire in the groove on the driving wheel, the welding wire is pressed.

[0077] When the welding wire pressing force needs to be adjusted, the welding wire pressing force adjusting knob is rotated, the compression amount of the welding wire pressing force adjusting spring will increase or decrease, the elastic force of the welding wire pressing force adjusting spring on the pressing arm increases or decreases, so as to adjust the pressing force of the pressing wheel on the welding wire, so as to meet the needs of different application scenarios.

[0078] The control method of the welding protective gas on-off, the gas is delivered to the main body through the cable assembly. The main body and other parts constitute a gas valve. The sealing ring is installed on the cover and the valve rod, at this time the gas valve spring is in the compressed state, the gas valve spring applies pressure to the valve rod, the valve rod and the main body form a sealed cavity, and the gas is sealed in the main body. Press the gas valve rod, the valve rod moves, the gas valve spring continues to be compressed, at this time the valve rod and the main body no longer form a sealed cavity, and the gas flows out.

[0079] The above is only the preferred embodiment of the present application, it should be pointed out that, for those skilled in the technical field, without departing from the principle of the present application, can make a number of improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A wire feed mechanism for a welding torch, characterized by: The utility model relates to a welding wire feeding device, which comprises a main body; a welding wire driving assembly, a welding wire pressure adjusting assembly and a welding wire pressure structure assembly are arranged on the main body; The welding wire driving assembly comprises a driving wheel (6) and a driving motor (7); the driving wheel (6) is arranged above the main body, the outer circumferential surface of the driving wheel (6) is processed with a driving wheel clamping groove capable of clamping a welding wire, the bottom of the driving wheel (6) is connected with the driving motor (7), the driving motor (7) drives the rotation of the driving wheel (6) and in turn drives the welding wire in the driving wheel clamping groove to move; A welding wire pressure adjusting assembly mounting hole is formed in the main body, and the welding wire pressure adjusting assembly is mounted in the welding wire pressure adjusting assembly mounting hole; The welding wire pressure adjusting assembly comprises a welding wire pressure adjusting knob (503), a screw rod (502) and a welding wire pressure adjusting spring (501); the welding wire pressure adjusting spring (501) is mounted in the welding wire pressure adjusting assembly mounting hole, the first end of the welding wire pressure adjusting spring (501) is connected with the first end of the screw rod (502), the screw rod (502) is connected with the welding wire pressure adjusting assembly mounting hole through screw threads, and the second end of the screw rod (502) is connected with the welding wire pressure adjusting knob (503); the screw rod (502) can be driven to move back and forth in the welding wire pressure adjusting assembly mounting hole by rotating the welding wire pressure adjusting knob (503), and in turn the welding wire pressure adjusting spring (501) can be driven to move back and forth in the welding wire pressure adjusting assembly mounting hole. The welding wire pressing structure assembly comprises a pressing arm (402), a pressing wheel (5), an elastic sheet (404), a pressing arm rotation fixing screw (401) and an elastic sheet fixing screw (403); the first end of the elastic sheet (404) is fixed to the main body through the elastic sheet fixing screw (403); the middle part of the pressing arm (402) is fixed to the main body through the pressing arm rotation fixing screw (401), and the pressing arm (402) can rotate around the pressing arm rotation fixing screw (401); the first end of the pressing arm (402) is connected with the second end of the welding wire pressing force adjusting spring (501), and the second end of the pressing arm (402) is provided with the pressing wheel (5); the second end of the pressing arm (402) is further provided with a thrust arm (903), and the bottom of the thrust arm (903) is provided with an elastic sheet limiting stop (904) capable of being matched with the second end of the elastic sheet (404) for limiting and connecting; when the welding wire is in a non-pressing state, the welding wire is clamped in the driving wheel clamping groove of the driving wheel (6) and moves with the driving wheel, and the two ends of the pressing arm (402) are supported and fixed by the welding wire pressing force adjusting spring (501) and the elastic sheet (404); when the welding wire needs to be pressed, the elastic sheet (404) is pressed to make the second end of the elastic sheet (404) disengage from the elastic sheet limiting stop (904), and the second end of the pressing arm (402) is rotated towards the driving wheel (6) under the elastic force of the welding wire pressing force adjusting spring (501), until the pressing wheel (5) contacts the welding wire clamped in the driving wheel (6) and presses the welding wire.

2. A wire feed mechanism for a welding torch according to claim 1, wherein: A gas passage (205) penetrating through the whole main body is formed on the main body along the length direction of the main body; A gas valve structure assembly mounting hole is further formed on the main body, the gas valve structure assembly mounting hole is in communication with the gas passage (205), and a gas valve structure assembly is mounted in the gas valve structure assembly mounting hole, the gas valve structure assembly can open or close the gas passage (205).

3. A wire feed mechanism for a welding torch according to claim 2, wherein: The gas valve structure assembly comprises a gas valve cover (301), a gas valve spring (302) and a gas valve stem (303); The gas valve structure assembly mounting hole comprises an upper large cylindrical hole (701), a middle transition step surface (702) and a lower small cylindrical hole (703); The cover cylindrical surface (803) at the top of the gas valve cover (301) can be mounted and positioned in interference fit with the top of the large cylindrical hole (701); a first annular groove (801) for mounting a sealing ring is formed on the outer circumferential surface of the gas valve cover (301), and after a sealing ring is mounted in the first annular groove (801), the first annular groove (801) can be sealed in interference fit with the large cylindrical hole (701); The rod body top of the gas valve stem (303) is provided with a second annular groove (805) for installing a sealing ring, and the second annular groove (805) can be sealed in interference fit with the large cylindrical hole (701) after the sealing ring is installed therein; the lower end of the rod body of the gas valve stem (303) is provided with a third annular groove (806) for installing a sealing ring and a fourth annular groove (807) for installing a sealing ring, and the third annular groove (806) and the fourth annular groove (807) can be sealed in interference fit with the small cylindrical hole (703) after the sealing rings are installed therein; the bottom of the rod body of the gas valve stem (303) protrudes from the gas valve structure assembly mounting hole; The top end of the gas valve stem (303) is provided with a stem blind hole (804), the bottom end of the gas valve cover (301) is provided with a cover blind hole (802), and the two ends of the gas valve spring (302) are respectively installed in the stem blind hole (804) and the cover blind hole (802); when the gas valve stem (303) is not forced, the gas valve spring (302) supports the gas valve stem (303) to move downward to seal the gas passage (205); when the bottom of the rod body of the gas valve stem (303) is forced to move upward, the gas valve stem (303) opens the gas passage (205).

4. The wire feed mechanism for a welding torch of claim 1, wherein: A wire feeding pipe positioning structure assembly mounting hole is formed in the main body, and a wire feeding pipe positioning structure assembly is installed in the wire feeding pipe positioning structure assembly mounting hole; The wire feeding pipe positioning structure assembly comprises a guide rod (601), a guide rod fixing screw (602), a positioning cap (604), and a positioning cap fixing screw (603); The guide rod (601) is installed in the wire feeding pipe positioning structure assembly mounting hole and is fixed by the guide rod fixing screw (602); one end of the welding wire guide pipe (3) is fixedly connected with the positioning cap (604) by screw threads, and then the other end of the welding wire guide pipe (3) is inserted from one end of the guide rod (601) until the positioning cap (604) reaches the corresponding matching position on the guide rod (601), and then the positioning cap (604) is fixed on the guide rod (601) by the positioning cap fixing screw (603).

5. The wire feed mechanism for a welding torch of claim 1, wherein: The first end of the screw rod (502) is a screw rod boss (1001) capable of being connected with the first end of the welding wire pressing force adjusting spring (501), the middle part of the screw rod (502) body is provided with a screw rod external thread (1002) capable of being connected with the welding wire pressing force adjusting assembly mounting hole, and the second end of the screw rod (502) is provided with a screw rod limiting plane (1003) capable of being connected with the welding wire pressing force adjusting knob (503) to limit.

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