JP2013150993A - Welding tip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem wherein frequency in tip replacement can be reduced to 1/2-1/3 times because of using tungsten or molybdenum, or an alloy of tungsten or molybdenum and copper for at least a leading edge tip portion of a welding tip, but a unit cost may be increased to 2-4 times compared with conventional chromium copper depending on material due to an increase in tip material cost, which results in the actual situation where there is hardly any cost advantage if cost is compared with effects.SOLUTION: A welding tip for supplying power to a welding wire includes a conductive leading edge side tip member having a first welding wire insertion hole; a conductive rear end side tip member having a second welding wire insertion hole; and a fixture for fixing the leading edge side tip member to the rear end side tip member so that the welding wire passes through the first wire insertion hole after passing through the second welding wire insertion hole. The leading edge side tip member can be rotated for use.

Description

  The present invention relates to a welding tip that supplies power to a welding wire that is a consumable electrode.

  In the consumable electrode type arc welding, a welding wire is sent to a welding torch by a wire feeding device, and a welding current output from a welding machine is supplied to a welding wire from a welding tip provided at the tip of the welding torch.

  In recent years, regarding the welding tips, production sites that use automatic welding systems such as robots have been required to reduce the frequency of replacement of welding tips as part of reducing running costs. Phenomena in which it is necessary to replace the welding tip include welding defects such as occurrence of welding position deviation (bead position deviation) and unstable welding. The cause of welding failure is that the tip of the welding tip is consumed due to repeated welding, and the tip hole of the welding tip is greatly deformed into a long hole, resulting in misalignment of the weld bead or welding. For example, an arc instability may occur when power is supplied to the welding wire at the tip hole of the welding tip at the start, and power is supplied to the back of the tip hole.

  As shown in FIG. 9, as a specification of a welding tip made of a conductor in which a conventional wire insertion hole is formed, at least the tip tip 102 is made of tungsten or molybdenum in the tip body 101 and the tip tip 102 constituting the welding tip. Or one formed of an alloy of tungsten or molybdenum and copper is known (for example, see Patent Document 1).

  This is because the tip hole of the welding tip is greatly deformed into a long hole by forming a different material having both wear resistance and feeding characteristics at the hole tip of the welding tip, which is the feeding point with the welding wire. This is intended to reduce the frequency of replacement of the welding tip.

Japanese Utility Model Publication No. 64-15673

  In the conventional welding tip, at least the tip tip 102 is made of tungsten or molybdenum, or an alloy of tungsten or molybdenum and copper. Therefore, the consumption of the welding tip can be suppressed and the replacement frequency of the welding tip can be reduced to about 1/2 to 1/3. However, the material cost of the welding tip is increased. And depending on the material, the cost unit price may be 2 to 4 times higher than that of conventional chromium copper. Therefore, the actual situation is that there is almost no cost merit when comparing costs and effects.

  Therefore, the present invention realizes a welding tip that can reduce the replacement frequency of the welding tip with an inexpensive material so far without using an expensive different material such as tungsten or molybdenum, or an alloy of tungsten or molybdenum and copper. For the purpose.

  In order to solve the above-mentioned problems, a welding tip according to the present invention is a welding tip for supplying power to a welding wire, and includes a conductive tip-side tip member having a first welding wire insertion hole, and a second welding. A conductive rear end tip member having a wire insertion hole and the rear end tip member so that the welding wire passes through the first wire insertion hole after passing through the second welding wire insertion hole. A fixture for fixing to the end-side tip member is provided.

  Further, in the welding tip of the present invention, in addition to the above, the rear end side tip member has a recess into which at least a part of the front end side tip member is inserted, and the welding wire of the recess of the rear end side tip member The cross-sectional shape in the direction orthogonal to the insertion direction and the cross-sectional shape in the direction orthogonal to the welding wire insertion direction of the portion inserted into the rear end side tip member of the tip side tip member are the same shape. It is.

  Further, in addition to the above, the welding tip of the present invention is inserted into the rear end side tip member of the front end side tip member and the cross-sectional shape perpendicular to the welding wire insertion direction of the recess of the rear end side tip member. The cross-sectional shape in the direction orthogonal to the welding wire insertion direction of the portion to be formed is a polygon.

  Further, in addition to the above, the welding tip according to the present invention is in a state where the fixing of the tip side tip member by the fixture to the rear end side tip member is released, and the tip side tip member of the tip side tip member according to the polygonal angle. The relative position with respect to the rear end side chip member can be changed, and after changing the relative position, the front end side chip member is fixed to the rear end side chip member by the fixture.

  Further, in addition to the above, the welding tip of the present invention is inserted into the rear end side tip member of the front end side tip member and the cross-sectional shape perpendicular to the welding wire insertion direction of the recess of the rear end side tip member. The cross-sectional shape of the portion to be orthogonal to the welding wire insertion direction is a circular shape.

  Further, in addition to the above, the welding tip of the present invention may be configured such that the tip side tip member is inserted into the first wire insertion hole in a state where the fixing of the tip side tip member to the rear end side tip member by the fixture is released. It is possible to change the relative position with respect to the rear end side tip member of the front end side tip member by rotating to the center, and after changing the relative position, the front end side tip member is changed to the rear end side tip member by the fixing tool. It is fixed.

  In addition to the above, the welding tip of the present invention is provided by providing indicia with which the relative position can be visually recognized on the front end side tip member and the rear end side tip member.

  The welding tip of the present invention is a welding tip that is used by being attached to a tip body of a welding torch using a fixture, and the tip body is at least a part of the welding tip. A cross-sectional shape perpendicular to the welding wire insertion direction of the recess of the tip body, and the welding wire insertion direction of the portion of the welding tip to be inserted into the tip body The cross-sectional shape in the orthogonal direction is a polygon having the same shape.

  In addition to the above, the welding tip of the present invention has a relative relationship between the welding tip and the tip body according to a polygonal angle in a state where the fixing of the welding tip to the tip body by the fixture is released. The position can be changed, and after changing the relative position, the welding tip is fixed to the tip body by the fixture.

  The welding tip of the present invention is a welding tip that is used by being attached to a tip body of a welding torch using a fixture, and the tip body is at least a part of the welding tip. A cross-sectional shape perpendicular to the welding wire insertion direction of the recess of the tip body, and the welding wire insertion direction of the portion of the welding tip to be inserted into the tip body The cross-sectional shape in the orthogonal direction is the same circular shape, and the welding tip is rotated around the wire insertion hole in a state where the fixing of the welding tip to the tip body by the fixture is released. Then, the relative position of the welding tip with respect to the tip body can be changed, and after changing the relative position, the welding tip is inserted into the tip body by the fixture. And it is used by fixing to.

  Further, in addition to the above, the welding tip of the present invention is provided with a marking that allows the relative position to be visually recognized on the welding tip and the tip body.

  As described above, according to the present invention, the distal end tip member of the welding tip, which is a feeding point with the welding wire, can be formed by rotating the distal end tip member with respect to the rear end tip member. Even if it is greatly deformed into a long hole, a portion that is not consumed can be used by rotating the tip side tip member, and the welding tip can be newly used from a state close to a new one.

  As a result, the frequency of exchanging the entire welding tip can be reduced by the number of times that the tip side tip member is rotated and used. Therefore, a large cost merit can be obtained as many times as the number of times the tip side tip member is rotated and used with respect to the cost of replacing the entire welding tip.

(A) Side view of the welding tip in the first embodiment of the present invention (b) Bottom view of the welding tip in the first embodiment of the present invention (c) Side of the welding tip in the first embodiment of the present invention Sectional view (d) Sectional view of the welding tip in the first embodiment of the present invention Schematic diagram showing the welding state when the tip end hole of the welding tip becomes a long hole The figure which shows the appearance of the welding tip when the tip end hole for welding becomes a long hole (A) Side view of the welding tip in the first embodiment of the present invention (b) Bottom view of the welding tip in the first embodiment of the present invention (c) Side of the welding tip in the first embodiment of the present invention Sectional view (d) Sectional view of the welding tip in the first embodiment of the present invention (A) Side view of the welding tip in the first embodiment of the present invention (b) Bottom view of the welding tip in the first embodiment of the present invention (c) Side of the welding tip in the first embodiment of the present invention Sectional view (d) Sectional view of the welding tip in the first embodiment of the present invention (A) Side view of the welding tip in the second embodiment of the present invention (b) Bottom view of the welding tip in the second embodiment of the present invention (c) Side of the welding tip in the second embodiment of the present invention Sectional view (d) Sectional view of the welding tip in the second embodiment of the present invention (A) Side view of the welding tip in the second embodiment of the present invention (b) Bottom view of the welding tip in the second embodiment of the present invention (c) Side of the welding tip in the second embodiment of the present invention Sectional view (d) Sectional view of the welding tip in the second embodiment of the present invention (A) Side view of the welding tip in the second embodiment of the present invention (b) Bottom view of the welding tip in the second embodiment of the present invention (c) Side of the welding tip in the second embodiment of the present invention Sectional view (d) Sectional view of the welding tip in the second embodiment of the present invention Figure showing a conventional welding tip

  Below, the welding tip in this Embodiment used for consumable electrode type arc welding is demonstrated using FIGS. 1-8.

(Embodiment 1)
The welding tip according to the first embodiment will be described with reference to FIGS.

  FIG. 1 is a diagram showing a schematic configuration of a welding tip according to the first embodiment. The welding tip in the first embodiment is mainly composed of a conductive tip end tip member 1 having a first welding wire insertion hole 8 and a conductive rear end tip having a second welding wire insertion hole 9. For fixing the tip end tip member 1 to the tip end side tip member 2 so that the member 2 and a welding wire (not shown) pass through the first welding wire insertion hole 8 after passing through the second welding wire insertion hole 9 Consists of screws 3.

  The front end side chip member 1 has a convex part, and the rear end side chip member 2 has a concave part that fits with the convex part of the front end side chip member 1. Both the convex part of the front end side tip member 1 and the concave part of the rear end side tip member 2 have the same hexagonal cross-sectional shape in the direction orthogonal to the insertion direction of the welding wire.

  The side surface of the rear end side chip member 2 is provided with a thread groove to be screwed with the fixing screw 3, and the convex part of the front end side chip member 1 and the concave part of the rear end side chip member 2 are fitted. Then, the fixing screw 3 is screwed into the screw groove, and the front end side chip member 1 is pressed against the rear end side chip member 2 by the fixing screw 3 to fix the front end side chip member 1 and the rear end side chip member 2. It is a structure to do. And since the shape of the fitting part which is the convex part of the front end side chip member 1 and the recessed part of the rear end side chip member 2 is a hexagon, the front end side chip member 1 is rotated with respect to the rear end side chip member 2. It is possible to change the relative position in the rotation direction of the tip side tip member 1 with respect to the rear end side tip member 2.

  In addition, the shape of the fitting part which is the convex part of the front end side chip member 1 and the recessed part of the rear end side chip member 2 shows the example of a hexagon in FIG. However, the present invention is not limited to this, and any polygon may be used, and there is no particular problem as long as it is a triangle or more and an octagon or less. If it is larger than the octagon, the rotation angle of the tip side tip member 1 is reduced to 45 ° or less, and the tip hole is not consumed by avoiding the tip portion of the welding tip that has become worn and elongated. Since it cannot be used, the effect of the welding tip according to the first embodiment in which the tip side tip member 1 is rotated and used is reduced.

  Here, first, the reason why the hole at the tip of the welding tip is consumed and becomes a long hole will be described.

  The welding wire is wound around a spool or reel made of resin or the like, or is a large drum type pack winding. Therefore, the welding wire has been in a state of being bent from the time of delivery. Further, in order to stabilize the power supply state to the welding wire, it is often the case that welding is performed by intentionally bending the welding wire and pressing the welding wire against the tip hole of the welding tip.

  From the above, welding is performed in a state where the welding wire is bent and wrinkled. Therefore, as shown in FIG. 2, when the welding tip is new, the welding wire hits the corner of the tip hole of the welding tip, the feeding point is stabilized, and a bead is formed at the targeted welding position. However, when welding is repeated and the consumption of the welding tip progresses, the corner of the tip hole of the welding tip is consumed, and the tip end hole is deformed in accordance with the shape of the bend of the welding wire. As a result, the feed point fluctuates, the arc becomes unstable, and a bead shift occurs such that a bead is not formed at the targeted welding position. FIG. 3 shows an actual welding tip in which the tip hole is consumed as a long hole.

  Next, a method for using the welding tip according to the first embodiment will be described.

  As a basic usage method, when the front end hole of the front end side tip member 1 is consumed, the front end side tip member 1 is once removed from the rear end side tip member 2 by releasing the fixing screw 3, and the rear end side tip member is removed. The front end side chip member 1 is rotated and fitted to a predetermined position with respect to 2, and the front end side chip member 1 is attached to the rear end side chip member 2 again by the fixing screw 3.

  In the welding tip according to the first embodiment, the tip side tip member 1 has a hexagonal convex shape, the rear end side tip member 2 has a hexagonal concave shape, and the tip side tip member 1 has a convex shape. And a concave portion of the rear end side chip member 2, and as shown in FIG. 1 (b), as shown in FIG. By relatively rotating the side chip member 2, six feeding points can be secured.

  When the tip hole of the tip side tip member 1 becomes a long hole in the direction of the a portion due to wear, for example, the tip side tip member 1 is rotated so that the b portion adjacent to the consumed a portion becomes a feeding point, , Use in order so that the feeding point becomes c part, d part, or rotate tip side tip member 1 so that d part on the diagonal line of a part becomes feeding point, further b part, It is also possible to use it with regularity by alternately rotating to the e part.

  Depending on how the tip hole of the welding tip is consumed, it may be better to rotate to part c instead of part b next to part a when using parts a, b, and c. is there. In some cases, the larger the wear area of the tip hole of the welding tip, the more it is necessary to rotate every two places at 120 ° intervals instead of every one at 60 ° intervals.

  The fixing screw 3 may be any screw such as a bug screw or a hexagon socket head screw. However, it is better to avoid the fixing screw 3 from protruding from the outer shape of the welding tip. The reason is that the outer surface of the welding tip is a portion through which the shielding gas passes, and if there is a portion protruding from the outer shape of the welding tip, the shielding gas will be disturbed and the weldability will be deteriorated. Further, there is a possibility that spatter adheres to the fixing screw 3, and if the spatter adheres to the fixing screw 3, it may be impossible to turn the fixing screw 3.

  1 is not a structure using the fixing screw 3 as shown in FIG. 1, but a structure in which the tip side tip member 1 is fixed so as to be sandwiched between the rear end side tip member 2 and the fixing member 4 as shown in FIG. It is also good. This structure improves the stability of fixation as compared with the structure shown in FIG. 1, and also improves the workability when the tip side tip member 1 is once removed and reattached. In the case of this structure, the rear end side chip member 2 is provided with a screw part, the fixing member 4 is provided with a screw part that is screwed with the screw part of the rear end side chip member 2, and the rear end side chip member 2 screw is provided. The front end side tip member 1 may be sandwiched between the rear end side tip member 2 and the fixing member 4 by screwing the portion and the screw portion of the fixing member 4.

  Moreover, the shape of the convex part of the front end side chip member 1 and the shape of the concave part of the rear end side chip member 2 are not a polygon as shown in FIG. 1 or FIG. 4, but a circular shape as shown in FIG. Also good. By adopting a circular shape, the tip-side tip member 1 can be rotated by simply releasing the fixing screw 3 without having to remove the tip-side tip member 1 from the rear-end side tip member 2 once. Can be improved.

  However, in the case of a circular shape, since it is not known how much the tip side tip member 1 has been rotated, for example, as shown in FIG. You may make it provide in the rear-end side chip member 2. FIG.

  The welding tip shown in FIG. 5 can improve the workability of rotating the tip side tip member 1 as compared with the welding tip shown in FIGS. 1 and 4 and can also improve the degree of freedom of rotation. it can.

  As described above, the welding tip according to the first embodiment can contribute to the reduction of the welding running cost by the number of times of rotation only by rotating the tip side tip member 1. In addition, the amount of used welding tips to be discarded can be greatly reduced, which is environmentally friendly.

(Embodiment 2)
The second embodiment will be described with reference to FIGS. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  The main difference from the first embodiment is that in the first embodiment, the welding tip is divided into a tip tip member 1 and a rear tip member 2, and the tip tip member 1 has a convex shape, and the rear tip side. In the second embodiment, the tip for welding 6 is not divided, but the tip for welding 6 is convex, and the tip body 7 of the welding torch is used. Is a concave shape, and the convex welding tip 6 and the concave tip body 7 are fitted together.

  FIG. 6 is a diagram showing a schematic configuration of the welding tip 6 and the tip body 7 in the second embodiment.

  The welding tip 6 has a convex portion, and the tip body 7 has a concave portion that fits with the convex portion of the welding tip 6. The convex part of the welding tip 6 and the concave part of the tip body 7 have the same hexagonal cross-sectional shape in the direction orthogonal to the insertion direction of the welding wire.

  The side surface of the tip body 7 is provided with a screw groove that is screwed with the fixing screw 3, and is fixed to the screw groove in a state where the convex portion of the welding tip 6 and the concave portion of the tip body 7 are fitted. The screw 3 is screwed and the welding tip 6 is pressed against the tip body 7 by the fixing screw 3 to fix the welding tip 6 and the tip body 7. And since the shape of the fitting part which is the convex part of the welding tip 6 and the recessed part of the chip body 7 is a hexagon, it is possible to rotate and fix the welding tip 6 with respect to the chip body 7. The relative position in the rotation direction of the welding tip 6 with respect to the tip body 7 can be changed.

  In addition, the shape of the fitting part which is the convex part of the welding chip | tip 6 and the recessed part of the chip | tip body 7 has shown the example of the hexagon in FIG. However, the present invention is not limited to this, and any polygon may be used, and there is no particular problem as long as it is a triangle or more and an octagon or less. If it is larger than the octagon, the rotation angle of the welding tip 6 will be reduced to 45 ° or less, and the point where the tip hole is not consumed is avoided, avoiding the tip portion of the welding tip that has become worn and elongated. Since it becomes impossible, the effect of this Embodiment 2 which rotates and uses the welding tip 6 will reduce.

  Next, a method for using the welding tip according to the second embodiment will be described.

  As a basic usage method, when the tip hole of the welding tip 6 is consumed, the fixing screw 3 is released, the welding tip 6 is once removed from the tip body 7, and the welding tip 6 is removed from the tip body 7. The welding tip 6 is attached to the tip body 7 again by the fixing screw 3.

  In the second embodiment, the welding tip 6 has a hexagonal convex shape, the tip body 7 has a hexagonal concave shape, and the convex shape of the welding tip 6 and the concave shape of the tip body 7 are obtained. As shown in FIG. 6B, the welding tip 6 and the tip body 7 are relatively rotated at intervals of 60 ° from a to f as shown in FIG. 6 locations can be secured.

  When the tip hole of the welding tip 6 becomes a long hole in the direction of the a portion due to wear, for example, the welding tip 6 is rotated so that the b portion adjacent to the consumed a portion becomes a feeding point, Use in order so that the point becomes part c and part d, or rotate welding tip 6 so that part d on the diagonal line of part a becomes the feeding point, and further to parts b and e It is also possible to use them with regularity by rotating them alternately.

  Depending on how the tip hole of the welding tip 6 is consumed, when using the a part, the b part, and the c part, it is better to rotate to the c part instead of the b part adjacent to the a part. There is also. As the consumption area of the tip hole of the welding tip 6 is larger, it may be necessary to rotate not at every 60 ° intervals but at every two 120 ° intervals.

  The fixing screw 3 may be any screw such as a bug screw or a hexagon socket head screw. However, it is better to avoid the fixing screw 3 from protruding from the outer shape of the chip body 7. The reason is that the outer surface of the tip body 7 is a portion through which the shield gas passes, and if there is a portion that protrudes from the outer shape of the tip body 7, the shield gas is disturbed and the weldability is deteriorated. Further, there is a possibility that spatter adheres to the fixing screw 3, and if the spatter adheres to the fixing screw 3, it may be impossible to turn the fixing screw 3.

  Further, instead of the structure using the fixing screw 3 as shown in FIG. 6, a structure may be adopted in which the welding tip 6 is fixed so as to be sandwiched between the tip body 7 and the fixing member 4 as shown in FIG. 7. This structure improves the stability of fixation as compared with the structure shown in FIG. 6 and also improves the workability when the welding tip 6 is once removed and reattached. In the case of this structure, the chip body 7 is provided with a screw portion, the fixing member 4 is provided with a screw portion to be screwed with the screw portion of the chip body 7, and the chip body 7 screw portion and the fixing member 4 screw portion are provided. And the welding tip 6 may be sandwiched between the tip body 7 and the fixing member 4.

  Further, the shape of the convex portion of the welding tip 6 and the shape of the concave portion of the tip body 7 may be a circular shape as shown in FIG. 8 instead of the polygon as shown in FIG. By adopting the circular shape, the welding tip 6 can be rotated only by releasing the fixing screw 3 without once removing the welding tip 6 from the tip body 7, thereby improving workability. .

  However, in the case of a circular shape, it is not known how much the welding tip 6 has been rotated. For example, as shown in FIG. 7 may be provided.

  The welding tip shown in FIG. 8 can improve the workability of rotating the welding tip 6 as compared with the welding tip shown in FIGS. 6 and 7, and can also improve the degree of freedom of rotation. .

  As described above, in the second embodiment, it is possible to contribute to the reduction of the welding running cost by the number of times of rotation by simply rotating the welding tip 6. In addition, since the number of used welding tips 6 to be discarded can be greatly reduced, it is environmentally friendly.

  The merit of the second embodiment over the first embodiment is that the number of joint locations inside the welding torch can be reduced because the welding tip 6 is not divided into two. The reason why it is preferable that the number of joints is small is that the temperature of the tip of the welding tip 6 that has received the radiant heat of the arc is excellent in thermal conductivity to dissipate heat to a portion far from the tip, and the cooling effect is great. In addition, when a water-cooled specification welding torch is used, the cooling effect is greater, and the wear of the welding tip 6 can be suppressed.

  Since the welding tip 6 is more easily consumed as the temperature of the welding tip 6 is higher, how to dissipate and cool the welding tip 6 can also reduce the consumption of the welding tip 6.

  The welding tip of the present invention has a structure in which the portion having the tip hole is rotated, so that even if the tip hole of the welding tip becomes a long hole, the welding tip can be rotated to a portion that is not consumed. It can be used for a long time, the frequency of replacement of welding tips can be reduced, the running costs related to welding can be reduced, and the amount of welding tips discarded can be reduced. In the system, it is industrially useful as a welding tip for supplying power to the welding wire.

DESCRIPTION OF SYMBOLS 1 Front end side tip member 2 Rear end side tip member 3 Fixing screw 4 Fixing member 5 Indicia 6 Welding tip 7 Tip body 8 First welding wire insertion hole 9 Second welding wire insertion hole 101 Tip body 102 Tip

Claims (11)

A welding tip for feeding a welding wire,
A conductive tip-side tip member having a first welding wire insertion hole;
A conductive rear end side tip member having a second welding wire insertion hole;
A welding tip provided with a fixture for fixing the distal end tip member to the rear end tip member so that the welding wire passes through the first wire insertion hole after passing through the second welding wire insertion hole. . The rear end side tip member has a recess into which at least a part of the front end side tip member is inserted, and a cross-sectional shape perpendicular to the welding wire insertion direction of the recess of the rear end side tip member, and the front end side 2. The welding tip according to claim 1, wherein a cross-sectional shape in a direction orthogonal to the welding wire insertion direction of a portion inserted into the rear end side tip member of the tip member is the same shape. The cross-sectional shape perpendicular to the welding wire insertion direction of the concave portion of the rear end side tip member and the direction orthogonal to the welding wire insertion direction of the portion inserted into the rear end side tip member of the front end side tip member The welding tip according to claim 2, wherein the cross-sectional shape is a polygon. In a state where the fixing to the rear end side tip member of the front end side tip member by the fixture is released, the relative position of the front end side tip member to the rear end side chip member can be changed according to the angle of the polygon, The welding tip according to claim 3, wherein after changing the relative position, the tip side tip member is fixed to the rear end side tip member by the fixture. The cross-sectional shape perpendicular to the welding wire insertion direction of the concave portion of the rear end side tip member and the direction orthogonal to the welding wire insertion direction of the portion inserted into the rear end side tip member of the front end side tip member The welding tip according to claim 2, wherein the cross-sectional shape is a circular shape. In a state where the fixing to the rear end side tip member of the front end side tip member is released, the front end side tip member is rotated around the first wire insertion hole, and the rear end side of the front end side tip member The welding tip according to claim 5, wherein the relative position with respect to the tip member can be changed, and the distal end side tip member is fixed to the rear end side tip member by the fixture after the relative position is changed. The welding tip according to claim 6, wherein the front end side tip member and the rear end side tip member are provided with indicia capable of visually recognizing a relative position. A welding tip used by being attached to a tip body of a welding torch using a fixture,
The tip body has a recess into which at least a part of the welding tip is inserted, a cross-sectional shape perpendicular to the welding wire insertion direction of the recess of the tip body, and the tip body of the welding tip A welding tip in which a cross-sectional shape in a direction perpendicular to the welding wire insertion direction of a portion inserted into the welding wire is a polygon having the same shape. In a state where the fixing of the welding tip by the fixture to the tip body is released, the relative position of the welding tip with respect to the tip body can be changed according to the angle of the polygon, and after changing the relative position, The welding tip according to claim 8, wherein the welding tip is used while being fixed to the tip body by a fixture. A welding tip used by being attached to a tip body of a welding torch using a fixture,
The tip body has a recess into which at least a part of the welding tip is inserted, a cross-sectional shape perpendicular to the welding wire insertion direction of the recess of the tip body, and the tip body of the welding tip The cross-sectional shape in the direction perpendicular to the welding wire insertion direction of the portion inserted into the circular shape is the same shape,
In a state where the fixing of the welding tip to the tip body by the fixing tool is released, the relative position of the welding tip with respect to the tip body can be changed by rotating the welding tip around the wire insertion hole. A welding tip that is used by fixing the welding tip to the tip body with the fixture after changing the relative position. The welding tip according to claim 10, wherein the welding tip and the tip body are provided with indicia capable of visually recognizing a relative position.

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