JP2011056517A - Consumable electrode gas shielded arc welding torch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a welding torch capable of straightening bending tendency of a welding wire. <P>SOLUTION: In the welding torch 21, a tip body 3 is attached to the tip end of a torch body 2 and a tip holder 25 is attached to the tip end of the tip body 3, a first power feeding tip 22 is provided between the tip end of the tip body 3 and the tip holder 25, a first tapered shape 24 is formed on the tip end side of the first power feeding tip, a first vertical slit 23 is formed from the tip, wherein the thickness of the proximal end side of the first vertical slit 23 is made thinner. A pressurizing shaft 30 pressurizes the first power feeding tip 22 through the spring force of a spring 6, the first tapered shape 24 is pressurized to the proximal end part of the tip holder 25, the diameter of the wire insertion hole of the first power feeding tip 22 is reduced and the welding wire is pressurized at a pressurizing point on the tip end side to feed power to the welding wire. Also, a rear end side pressurizing means is provided for pressurizing the welding wire at a rear end side pressurizing point situated in the proximal end direction of the tip body 3 from the tip end side pressurizing point. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an improved consumable electrode gas shielded arc welding torch.

  Today, in order to improve the work efficiency of welding, it is widely performed to automate welding using a welding robot. In this case, a consumable electrode gas shielded arc welding torch (hereinafter referred to as a welding torch) is attached to the wrist of the manipulator of the articulated robot, and a welding wire wound around a wire reel is fed to the welding torch for power and shielding. Gas is supplied to the welding torch for welding.

  Since the welding wire fed to the welding torch is usually wound around a wire reel, the welding wire is bent. Since the bending curve of the welding wire is not constant, it is difficult to match the tip position of the welding wire sent from the power feed tip attached to the tip of the welding torch to the desired welding target position.

  In addition, power is supplied to the welding wire when the welding wire comes into internal contact with the power supply tip attached to the tip of the welding torch. If the bending of the welding wire is not constant, the contact point between the welding wire and the power supply tip Is not constant. As a result, the length from the contact point between the welding wire and the power feed tip to the tip of the welding wire varies. Due to this variation, the resistance heat generation of the protruding length portion of the welding wire varies, and the amount of melting of the welding wire varies. As a result, the arc length varies and a uniform weld bead cannot be formed.

  Therefore, in order to solve the above-described problems, the following forced pressurizing power supply torch has been proposed. FIG. 7 is a cross-sectional view of a conventional welding torch. In the figure, the feeding direction of the welding wire is X1, and the opposite direction is X2. A tip body 3 including a first tip body 3 a and a second tip body 3 b is attached to a tip portion of the torch body 2 of the welding torch 1 in the X1 direction, and a tip holder 4 is attached to the tip portion of the tip body 3. ing. A heat resistant member 5 is provided at the tip of the chip holder 4. These torch body 2, tip body 3, tip holder 4, and heat-resistant member 5 have wire insertion holes formed in the shaft core portion. In addition, the heat-resistant member 5 described above prevents power supply to the welding wire when the welding wire comes into contact with the wire insertion hole of the chip holder 4.

  A spring 6 is provided inside the torch body 2. The pressure shaft 7 is provided inside the tip body 3, and the base end portion of the pressure shaft 7 in the X2 direction is in contact with the distal end portion of the spring 6. The spring 6 and the pressure shaft 7 have a wire insertion hole formed in the shaft core portion. A distal end portion of a wire guide liner 14 that guides a welding wire fed from a wire feeding device (not shown) is inserted through the spring 6 and inserted into a proximal end portion of the pressure shaft 7.

  The power feed tip 8 has a wire insertion hole formed in the shaft core portion, and the base end portion in the X2 direction of the power feed tip 8 is inserted into the tip end portion of the second tip body 3b, and the tip end portion of the pressure shaft 7 The tip of the power feed tip 8 in the X1 direction is inserted into the tip holder 4. That is, the power feed tip 8 is pressed by the pressure shaft 7 and the tip holder 4. Further, the power feed tip 8 is formed with a vertical slit 9 extending from the tip portion along the wire insertion hole, and the thickness of the vicinity of the base end portion of the vertical slit 9 is reduced on the side surface of the power feed tip 8. The feeding chip 8 is easy to bend.

  Further, a taper shape 10 is formed on the side surface of the power supply chip 8 so as to contact an inclined surface formed at the base end portion of the chip holder 4. For this reason, since the vertical slit 9 is formed as described above, when the tip of the power feed tip 8 is inserted into the chip holder 4 and the power feed tip 8 is pressed by the pressure shaft 7 and the chip holder 4. The tip of the wire insertion hole 9 of the power supply tip 8 is reduced in diameter, and the inner surface of the wire insertion hole pressurizes the welding wire to supply power.

  An orifice 11 is provided below the first tip body 3 a, and a nozzle 12 surrounds the tip holder 4 and the orifice 11. Shielding gas is ejected through the ejection hole of the orifice 11, and this shielding gas shields the arc, the molten pool and the surrounding area from nitrogen and oxygen in the atmosphere. An insulating bush 13 is provided around the first chip body 3a. (For example, refer to Patent Document 1).

  The operation will be described below. A welding wire fed from a wire feeding device (not shown) is guided by the wire guide liner 14 and is inserted through the spring 6, the pressure shaft 7, the power feed tip 8 and the tip holder 4. The spring 6 presses the pressure shaft 7, and the power supply tip 8 is pressed by the pressure shaft 7 and the tip holder 4. At this time, since the vertical slit 9 is formed in the power supply tip 8, the inner surface of the wire insertion hole of the power supply tip 8 pressurizes the welding wire to supply power.

  Further, the electric power supplied to the torch body 2 flows through the chip body 3, flows into the chip holder 4, is supplied to the power feeding chip 8, and is supplied to the welding wire. Shielding gas is ejected through the ejection hole of the orifice 11, and this shielding gas shields the arc, the molten pool and the surrounding area from nitrogen and oxygen in the atmosphere.

International Publication No. WO2008 / 018594A1 Pamphlet

  In the conventional welding torch 1 described above, when the welding wire to be fed is not aluminum or a large diameter, the inner surface of the wire insertion hole of the power feed tip 8 pressurizes the welding wire to correct the bending wrinkle of the welding wire. Further, by making the feeding point constant, the amount of melting of the welding wire can be made constant and a uniform weld bead can be formed. However, when the welding wire is made of stainless steel or has a large diameter, the welding wire itself has high rigidity. Therefore, even if the power supply tip 8 is reduced in diameter and the welding wire is pressurized, the bending flaw of the welding wire is sufficiently corrected. Can not do it. Therefore, it becomes difficult to make the tip position of the welding wire sent out from the welding torch 1 coincide with a desired welding target position, resulting in a defective welding.

  In addition, when the operation of the welding robot is large and complicated depending on the shape of the workpiece, the welding wire may be bent greatly by bending the single wire power cable extremely. In this case also, the above-mentioned problem occurs. In order to eliminate these problems, the welding wire can be corrected by increasing the spring force of the spring 6 of the welding torch 1. However, when the spring force of the spring 6 is increased, the feeding resistance of the welding wire increases, and the welding wire cannot be stably fed, and the arc length varies to form an appropriate welding bead. I can't.

  An object of this invention is to provide the welding torch which can correct the bending wrinkle of a welding wire.

The first invention is
Torch body,
A tip body attached to the tip of the torch body;
A chip holder attached to the tip of the chip body;
Provided between the tip portion of the tip body and the tip holder, a first taper shape is formed on the side surface of the tip portion, and a first vertical slit extending from the tip portion along the wire insertion hole is formed. A first feeding chip in which the thickness of the base end side surface of the first vertical slit is reduced;
A spring provided inside the torch body;
A pressure shaft that presses the first power supply tip by the spring force of the spring;
The pressure shaft presses the first power feeding tip by the spring force of the spring, and the first taper shape of the first power feeding tip is pressed against the base end portion of the chip holder. In the consumable electrode gas shield arc welding torch that the wire insertion hole is reduced in diameter and pressurizes the welding wire at the tip side pressurizing point to supply power,
Pressurizing the welding wire at the front end side pressurizing point, and pressurizing the welding wire at the rear end side pressurizing point located closer to the proximal end portion of the tip body than the front end side pressurizing point A consumable electrode gas shield arc welding torch comprising means.

The second invention is
The rear end side pressurizing means is provided between the first power feeding tip and the pressure shaft, and a first rear end side tapered shape is formed at a base end portion on the pressure shaft side. A first rear end side feeder chip is formed which has a first rear end side vertical slit extending from the end portion along the wire insertion hole, and the thickness of the side surface of the base end portion of the first rear end side vertical slit is reduced. Prepared,
An inclined surface corresponding to the first rear end side taper shape is formed at the front end portion of the pressure shaft,
The pressure shaft presses the first rear end side power supply tip by the spring force of the spring, and the first rear end side taper shape of the first rear end side power supply tip is pressed by the inclined surface of the pressure shaft. And the wire insertion hole of the first rear end side power supply tip is reduced in diameter to pressurize the welding wire,
The consumable electrode gas shield arc welding torch according to the first aspect, wherein the first rear end side power feed tip presses the first power feed tip.

The third invention is
The consumable electrode gas shield arc welding torch according to the second invention, wherein the first power supply tip and the first rear end side power supply tip are formed as a single body.

The fourth invention is:
The rear end side pressurizing means is formed with a shaft taper shape at the front end portion of the pressure shaft, and a shaft vertical slit extending from the front end portion along the wire insertion hole is formed. Reduce the thickness of the side of the end,
An abutting member that abuts the distal end portion of the pressure shaft is provided at the proximal end portion of the first power feed tip, and an inclination corresponding to the tapered shape of the shaft is provided at the proximal end portion of the abutting member on the pressure shaft side. A surface is formed,
The pressure shaft presses the abutting member of the first power feeding tip by the spring force of the spring, and the shaft taper shape of the pressure shaft is pressed by the inclined surface of the abutting member to increase the pressure. While the wire insertion hole of the pressure shaft is reduced in diameter to pressurize the welding wire,
The consumable electrode gas shield arc welding torch according to the first aspect, wherein the first power supply tip is pressed by the pressure shaft through the contact member.

  In the welding torch according to the present invention, the welding wire to be fed is made of stainless steel or a large diameter, and when the rigidity of the welding wire itself is high or the operation of the welding robot is greatly complicated depending on the shape of the work piece, Even when the power cable is extremely bent and the welding wire has a large bend, the welding wire feeding resistance is not increased by increasing the spring force of the welding torch spring as in the prior art. The bend 癖 can be corrected sufficiently. Therefore, the tip position of the welding wire delivered from the welding torch can be matched with the desired welding target position, and there is no problem of poor welding.

It is sectional drawing of the welding torch of Embodiment 1 of this invention. It is an exploded sectional view of the welding torch of Embodiment 1 of the present invention. It is sectional drawing of the welding torch of Embodiment 2 of this invention. It is an exploded sectional view of the welding torch of Embodiment 2 of the present invention. It is sectional drawing of the welding torch of Embodiment 3 of this invention. It is an exploded sectional view of the welding torch of Embodiment 3 of the present invention. It is sectional drawing of the welding torch of a prior art.

[Embodiment 1]
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on examples with reference to the drawings. 1 is a cross-sectional view of a welding torch according to Embodiment 1 of the present invention, and FIG. 2 is an exploded cross-sectional view of the welding torch according to Embodiment 1 of the present invention. 1 and 2, the first power feed tip of the welding torch 21 (hereinafter referred to as the first tip-side power feed tip 22 in the first embodiment) extends from the tip portion in the X1 direction along the wire insertion hole. The side vertical slit 23 is formed, and the thickness of the first tip side vertical slit 23 in the vicinity of the base end portion in the X2 direction is reduced on the side surface of the first tip side power feed tip 22 to thereby provide the first tip side power feed. The tip 22 is easy to bend. In addition, a first distal-side taper shape 24 is formed on the side surface of the first distal-side power feed tip 22 so as to contact an inclined surface 26 formed at the proximal end portion of the chip holder 25 in the X2 direction.

  The first rear end side power supply chip 27 is provided at the base end portion in the X2 direction of the first front end side power supply chip 22, and the first rear end side is disposed at the base end portion of the first rear end side power supply chip 27 in the X2 direction. A tapered shape 28 is formed, and a first rear end side vertical slit 29 extending from the base end portion in the X2 direction of the first rear end side power supply tip 27 along the wire insertion hole is formed. Further, in order to make the first rear end side power supply tip 27 bend easily, the thickness of the first rear end side vertical slit 29 near the base end portion in the X1 direction is reduced on the side surface of the first rear end side power supply tip 27. is doing. An inclined surface 31 corresponding to the first rear end side taper shape 28 of the first rear end side power supply tip 27 is formed at the front end portion in the X1 direction of the first pressure shaft 30. For other functions, the same functions as those of the conventional welding torch 1 shown in FIG.

  The operation will be described below. In FIG. 1, a welding wire fed from a wire feeding device (not shown) is guided by the wire guide liner 14, and the spring 6, the first pressure shaft 30, the first rear end side power feeding tip 27, the first 1 Insert the tip-side power feed tip 22 and the tip holder 25. Then, the first pressure shaft 30 presses the first rear end side power feed tip 27 by the spring force of the spring 6. At this time, the first rear end side taper shape 28 of the first rear end side power supply tip 27 is pressed by the inclined surface 31 of the first pressure shaft 30, and at this time, the first rear end side power supply tip 27 has a first Since the rear end side vertical slit 29 is formed, the inner surface of the wire insertion hole of the first rear end side power supply tip 27 pressurizes the welding wire. This pressurization point is defined as a rear end side pressurization point.

  Further, the first front end side power supply tip 22 is pressed by the first pressure shaft 30 via the first rear end side power supply tip 27, and the first front end side taper shape 24 of the first front end side power supply tip 22 is the tip. The inclined surface 26 of the holder 25 is pressed. At this time, since the first tip-side longitudinal slit 23 is formed in the first tip-side power feed tip 22, the inner surface of the wire insertion hole of the first tip-side power feed tip 22 pressurizes the welding wire. This pressurizing point is defined as the tip side pressurizing point.

  In addition, the power supplied to the torch body 2 flows through the chip body 3 and flows into the chip holder 25, power is supplied to the first tip-side power feed tip 22, and power is supplied to the welding wire at the tip-side pressurizing point. . At this time, power is also supplied from the first front end side power supply tip 22 to the first rear end side power supply tip 27 to be supplied to the welding wire, but usually a current flows from the side closer to the workpiece. Therefore, since the power supply to the welding wire is supplied at the tip side pressurizing point where the welding wire is pressed by the first tip side power supply tip 22, the power supply point to the welding wire is stable. The welding wire is pressurized and corrected at the front end side pressurization point of the first front end side power supply tip 22 and the rear end side pressurization point of the first rear end side power supply tip 27, and is sent out from the chip holder 25. The Shielding gas is ejected through the ejection hole of the orifice 11, and this shielding gas shields the arc, the molten pool and the surrounding area from nitrogen and oxygen in the atmosphere.

  As described above, in the welding torch 21 according to the first embodiment of the present invention, the welding wire has the front end side pressurization point of the first front end side power supply tip 22 and the rear end side pressurization point of the first rear end side power supply tip 27. Then, the pressure is corrected by pressing, and then sent out from the chip holder 25. As a result, the welding wire to be fed is made of stainless steel or large diameter, and the welding wire itself has high rigidity, or the welding robot's operation is greatly complicated depending on the shape of the workpiece to be welded. Even when the welding wire is bent to a large degree, the welding wire is bent without increasing the feeding resistance of the welding wire by increasing the spring force of the welding torch spring as in the prior art. It can be corrected sufficiently. Therefore, the tip position of the welding wire delivered from the welding torch can be matched with the desired welding target position, and there is no problem of poor welding.

  Furthermore, since the bending of the welding wire itself can be corrected and straightened, it is possible to feed a welding wire with higher straightness than that of the prior art, enabling stable feeding and welding quality. Is significantly improved.

[Embodiment 2]
FIG. 3 is a sectional view of the welding torch according to the second embodiment of the present invention, and FIG. 4 is an exploded sectional view of the welding torch according to the second embodiment of the present invention. 3 and 4, the function of the second power feed tip 42 of the welding torch 41 is the same as that of the first front end side power feed tip 22 and the first rear end side power feed of the welding torch 21 according to the first embodiment of the present invention shown in FIG. 1. The function is the same as that of the chip 27 formed as a single unit. The second power feed tip 42 is formed with a second tip side vertical slit 43 extending from the tip end portion in the X1 direction along the wire insertion hole, and the second tip side vertical slit 43 on the side surface of the second power feed tip 42. The thickness in the vicinity of the base end portion in the X2 direction is made thin so that the tip end portion in the X1 direction of the second power feed chip 42 is easily bent. In addition, a second distal-side taper shape 44 is formed on the side surface of the second power feed tip 42 so as to come into contact with the inclined surface 26 formed at the proximal end portion of the tip holder 25 in the X2 direction.

  A second rear end side taper shape 45 is formed at the base end portion in the X2 direction of the second power feed tip 42, and extends from the base end portion in the X2 direction of the second power feed tip 42 along the wire insertion hole. A vertical slot 46 is formed. In addition, in order to make the rear end side of the second power feed tip 42 in the X2 direction easy to bend, the thickness of the second rear end side vertical slit 46 near the base end portion in the X1 direction on the side surface of the second power feed tip 42 is reduced. is doing. Note that the second front end side vertical slit 43 and the second rear end side vertical slit 46 are not continuous in order to make the second power feeding chip 42 an integral object. For the other functions, the same functions as those of the welding torch 21 of the first embodiment of the present invention shown in FIG.

  The operation will be described below. 3 and 4, the welding wire fed from a wire feeding device (not shown) is guided by the wire guide liner 14, and the spring 6, the first pressure shaft 30, the second power feed tip 42, and the tip are guided. The holder 25 is inserted. Then, the first pressure shaft 30 presses the second power feed tip 42 by the spring force of the spring 6. At this time, the second rear end taper shape 45 of the second power feed tip 42 is pressed by the inclined surface 31 of the first pressure shaft 30, and at this time, the second power feed tip 42 has a second rear end side vertical slit. Since 46 is formed, the inner surface of the wire insertion hole of the second power supply tip 42 pressurizes the welding wire. This pressurization point is defined as a rear end side pressurization point.

  Further, the second power supply tip 42 is pressed by the first pressure shaft 30, and the second tip side taper shape 44 of the second power supply tip 42 is pressed by the inclined surface 26 of the chip holder 25. At this time, since the second tip side vertical slit 43 is formed in the second power feed tip 42, the inner surface of the wire insertion hole of the second power feed tip 42 pressurizes the welding wire. This pressurizing point is defined as the tip side pressurizing point.

  In addition, the power supplied to the torch body 2 flows through the chip body 3 and flows into the chip holder 25, power is supplied to the second power supply tip 42, and power is supplied to the welding wire at the tip side pressurizing point. At this time, electric power is about to be supplied to the welding wire at the rear end side pressurizing point of the second power feed tip 42, but current usually flows from the side closer to the workpiece. Therefore, since the power supply to the welding wire is supplied at the pressure point on the distal end side of the second power supply tip 42, the power supply point to the welding wire is stable. Then, the welding wire is pressed and corrected at the front-end-side pressurization point and the rear-end-side pressurization point of the second power feeding tip 42, and is sent out from the tip holder 25. Shielding gas is ejected through the ejection hole of the orifice 11, and this shielding gas shields the arc, the molten pool and the surrounding area from nitrogen and oxygen in the atmosphere.

  As described above, the welding torch 41 according to the second embodiment of the present invention includes the tip after the welding wire is pressed and corrected at the front end side pressurizing point and the rear end side pressurizing point of the second power feeding tip 42, respectively. It is sent out from the holder 25. As a result, in the welding torch 41 according to the second embodiment of the present invention, in addition to the effects exhibited by the welding torch 21 according to the first embodiment of the present invention described above, the second power feed tip 42 is formed as a single body. Easy to handle.

[Embodiment 3]
FIG. 5 is a sectional view of the welding torch according to the third embodiment of the present invention, and FIG. 6 is an exploded sectional view of the welding torch according to the third embodiment of the present invention. 5 and 6, a shaft taper shape 53 is formed at the tip of the pressure shaft 52 of the welding torch 51 in the X1 direction, and a shaft vertical slit 54 extending from the tip along the wire insertion hole is formed. . Further, in order to make the distal end portion of the pressure shaft 52 easy to bend, the thickness in the vicinity of the base end portion in the X2 direction of the shaft-side vertical slit 54 on the side surface of the distal end portion of the pressure shaft 52 is reduced. The first power feed chip (hereinafter referred to as the third power feed chip 55 in the third embodiment) is formed with a third vertical slot 57 extending from the tip end portion in the X1 direction along the wire insertion hole. The thickness of the third vertical slit 57 in the vicinity of the base end portion in the X2 direction is made thin so that the third feeding chip 55 is easily bent. Further, a third taper shape 58 is formed on the side surface of the third power feed tip 55 so as to come into contact with the inclined surface 26 formed at the base end portion of the tip holder 25 in the X2 direction.

  An abutting member 56 that abuts the pressure shaft 52 is provided at the base end portion of the third power feed tip 55 in the X2 direction, and the shaft side taper of the pressure shaft 52 is provided at the base end portion of the abutting member in the X2 direction. An inclined surface 59 corresponding to the shape is formed. The contact member 56 is not formed with the third vertical slot 57. For the other functions, the same functions as those of the welding torch 21 of the first embodiment of the present invention shown in FIG.

  The operation will be described below. 5 and 6, the welding wire fed from a wire feeding device (not shown) is guided by the wire guide liner 14, and the spring 6, the pressure shaft 52, the third power feed tip 55, and the tip holder 25. Is inserted. Then, the pressing shaft 52 presses the contact member 56 provided at the proximal end portion of the third power feed tip 55 by the spring force of the spring 6. At this time, the shaft taper shape 53 of the pressure shaft 52 is pressed by the inclined surface 59 of the contact member 56 of the third power feed tip 55. At this time, since the shaft slit 54 is formed in the pressurizing shaft 52, the inner surface of the wire insertion hole at the tip of the pressurizing shaft 52 pressurizes the welding wire. This pressurization point is defined as a rear end side pressurization point.

  Further, the third power feed tip is pressed by the pressure shaft 52 via the contact member 56, and the third taper shape 58 of the third power feed tip 55 is pressed against the inclined surface 26 of the chip holder 25. At this time, since the third power feed tip 55 is formed with the third vertical slit 57, the inner surface of the wire insertion hole of the third power feed tip 55 pressurizes the welding wire. This pressurizing point is defined as the tip side pressurizing point.

  Further, the electric power supplied to the torch body 2 flows through the chip body 3 and flows into the chip holder 4, and the electric power is supplied to the third power supply chip 55 and supplied to the welding wire. At this time, power is also supplied from the third power feed tip 55 to the third pressure shaft via the contact member 56 and is supplied to the welding wire. Flowing. Therefore, since the power supply to the welding wire is supplied at the tip side pressurizing point where the welding wire is pressed by the third power supply tip 55, the power supply point to the welding wire is stable. The welding wire is pressurized and corrected at the tip-side pressurizing point of the third power feed tip and the rear-end-side pressurizing point of the tip of the third pressurizing shaft 52, and is sent out from the tip holder 25. . Shielding gas is ejected through the ejection hole of the orifice 11, and this shielding gas shields the arc, the molten pool and the surrounding area from nitrogen and oxygen in the atmosphere.

  As described above, in the welding torch 51 according to the third embodiment of the present invention, the welding wire is pressed at the front end side pressurizing point of the third power feed tip 55 and the rear end side pressurizing point of the third pressurizing shaft 52. Then, it is sent out from the chip holder 25. As a result, the welding torch 51 according to the third embodiment of the present invention has the same effects as the effects achieved by the welding torch 21 according to the first embodiment of the present invention described above.

DESCRIPTION OF SYMBOLS 1 Welding torch 2 Torch body 3 Tip body 3a 1st tip body 3b 2nd tip body 4 Tip holder 5 Heat-resistant member 6 Spring 7 Pressurizing shaft 8 Feeding tip 9 Wire insertion hole 10 Taper shape 11 Orifice 12 Nozzle 13 Insulating bush 14 Wire Guide liner 21 Welding torch 22 First tip side power feed tip 23 First tip side vertical slit 24 First tip side taper shape 25 Tip holder 26 Inclined surface 27 First rear end side feed tip 28 First rear end side taper shape 29 First rear end side vertical slit 30 Pressure shaft 31 Inclined surface 41 Welding torch 42 Second power feed tip 43 Second front end side vertical slit 44 Second front end side taper shape 45 Second rear end side taper shape 46 Second rear End-side vertical slit 51 Welding torch 52 Pressure shaft 53 Shaft taper shape 54 Shaft vertical slit 55 Third power feed tip 56 Contact member 57 Third vertical slot 57
58 Third taper shape 59 Inclined surface

Claims (4)

Torch body,
A tip body attached to the tip of the torch body;
A chip holder attached to the tip of the chip body;
Provided between the tip portion of the tip body and the tip holder, a first taper shape is formed on the side surface of the tip portion, and a first vertical slit extending from the tip portion along the wire insertion hole is formed. A first feeding chip in which the thickness of the base end side surface of the first vertical slit is reduced;
A spring provided inside the torch body;
A pressure shaft that presses the first power supply tip by the spring force of the spring;
The pressure shaft presses the first power feeding tip by the spring force of the spring, and the first taper shape of the first power feeding tip is pressed against the base end portion of the chip holder. In the consumable electrode gas shield arc welding torch that the wire insertion hole is reduced in diameter and pressurizes the welding wire at the tip side pressurizing point to supply power,
Pressurizing the welding wire at the front end side pressurizing point, and pressurizing the welding wire at the rear end side pressurizing point located closer to the proximal end portion of the tip body than the front end side pressurizing point A consumable electrode gas shielded arc welding torch comprising means. The rear end side pressurizing means is provided between the first power feeding tip and the pressure shaft, and a first rear end side tapered shape is formed at a base end portion on the pressure shaft side. A first rear end side feeder chip is formed which has a first rear end side vertical slit extending from the end portion along the wire insertion hole, and the thickness of the side surface of the base end portion of the first rear end side vertical slit is reduced. Prepared,
An inclined surface corresponding to the first rear end side taper shape is formed at the front end portion of the pressure shaft,
The pressure shaft presses the first rear end side power supply tip by the spring force of the spring, and the first rear end side taper shape of the first rear end side power supply tip is pressed by the inclined surface of the pressure shaft. And the wire insertion hole of the first rear end side power supply tip is reduced in diameter to pressurize the welding wire,
The consumable electrode gas shield arc welding torch according to claim 1, wherein the first rear end side power feeding tip presses the first power feeding tip. 3. The consumable electrode gas shield arc welding torch according to claim 2, wherein the first power supply tip and the first rear end side power supply tip are formed as a single unit. The rear end side pressurizing means is formed with a shaft taper shape at the front end portion of the pressure shaft, and a shaft vertical slit extending from the front end portion along the wire insertion hole is formed. Reduce the thickness of the side of the end,
An abutting member that abuts the distal end portion of the pressure shaft is provided at the proximal end portion of the first power feed tip, and an inclination corresponding to the tapered shape of the shaft is provided at the proximal end portion of the abutting member on the pressure shaft side. A surface is formed,
The pressure shaft presses the abutting member of the first power feeding tip by the spring force of the spring, and the shaft taper shape of the pressure shaft is pressed by the inclined surface of the abutting member to increase the pressure. While the wire insertion hole of the pressure shaft is reduced in diameter to pressurize the welding wire,
The consumable electrode gas shield arc welding torch according to claim 1, wherein the first power supply tip is pressed by the pressure shaft through the contact member.

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