JPH0659554B2 - Consumable electrode welding torch - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a consumable electrode welding torch applied to a weaving method in consumable electrode welding.

[Conventional technology]

Conventionally, various weaving methods have been devised for moving the tip of the welding rod during welding with a welding torch in order to efficiently form a beautiful weld with no defects depending on the rod type, rod diameter, posture, etc. The representative examples thereof are as shown in FIGS. 8, 9 and 10.

In FIG. 8, 81 is a welding wire, 82 is a welding torch body, 83 is a center of rotation of the welding torch body 82, 84 is a swinging direction 84 around the center of rotation 83 of the welding torch body 82.
When the welding wire 81 is swung as shown in FIG.

Further, in FIG. 9, 91 is a welding wire, 92 is a welding torch main body, 93 is a feeding roller, 95 is an oscillating plate, and 94 is an oscillating direction of the oscillating plate 95. The operating method is the swing plate 95.
When the welding wire 91 is swung as shown in the swinging direction 94, the welding wire 91 has a periodic bending behavior, and the bending behavior of the welding wire 91 is restrained while passing through the welding torch 92. Is bent again and the tip of the wire swings left and right.

In FIG. 10, 101 is a welding wire, 102 is a welding torch body, 103 is a welding tip hole, and 105 is a welding wire 101 on the surface.
A weaving bar 104 in which a groove for guiding the is carved in parallel with the axis is a rotating direction of the weaving bar 105. The operation method is to swing the weaving bar 105 as shown in the swinging direction 104. Due to the eccentricity difference between the welding chip hole 103 and the groove of the weaving bar 105, the tip of the welding wire 101 draws a semi-circular locus to the left and right. Shake.

[Problems to be solved by the invention]

 The conventional device has the following drawbacks.

The welding torch body 82 shown in FIG. 8 has a narrow width and cannot weave between the grooves. For this reason, the tip of the welding wire 81 could not be sufficiently oriented toward the groove wall surface, and the groove wall surface was insufficiently melted, so that penetration failure was likely to occur. Further, in the welding torch body 92 shown in FIG. 9, the welding wire 91 is changed by changing the swing angle of the swing plate 94.
Although it is possible to change the radius of curvature of the welding wire, it is possible to change the radius of curvature after passing the bending torch body 92 again after the bending to attach the welding wire. There is an inconvenience such that there is a time delay until the vibration of 91 passes through the welding torch body 92. For this reason, when the groove width changes suddenly, it is difficult to adjust the weaving width with good responsiveness, and the proper arc position with respect to the groove wall surface cannot be maintained, resulting in poor penetration. Furthermore, in the welding torch body 102 shown in FIG. 10, even if the groove width changes suddenly, it can be corrected immediately by adjusting the rotation amount of the weaving bar 105, but the welding tip hole 103 and the weaving bar 105 can be corrected.
Since the gap with the tip of the welding wire cannot be extremely close due to the rigidity of the welding wire, the swing width of the tip of the welding wire 101 is limited. Therefore, a sufficient swing width cannot be obtained, which causes a penetration failure.

[Means for solving problems]

In order to solve the above problems, the present invention provides a hollow tubular welding torch body in which a welding wire lead-out hole is provided at a position distant from the axis on an end face for leading out a welding wire, and is inserted in the welding torch body. A fitting body provided, and a welding wire guiding means formed in a position apart from the shaft center of the fitting body in parallel with the shaft center;
A consumable electrode welding torch comprising: the welding torch body and the fitting body, and means for reversing the welding torch body and the fitting body with respect to each other about an axis thereof.

[Action]

Since the consumable electrode welding torch of the present invention has the above-mentioned mechanism, when weaving in a narrow groove having a narrow width and a deep groove, the welding torch main body and the fitting body are reversed to each other so that the tip of the welding wire is left and right. The swing width of the welding wire tip can be immediately changed by externally adjusting the amount of rotation between the welding torch body and the fitting body.

〔Example〕

Hereinafter, the present invention will be specifically described based on the embodiments shown in the drawings.

FIG. 1 is a vertical sectional view of a consumable electrode welding torch body according to an embodiment of the present invention. FIG. 2 is a vertical cross-sectional view showing a state of the welding torch body and the fitting body at the time of welding the left corner according to the present embodiment. FIG. 3 is a sectional view taken along the line III-III in FIG. FIG. 4 is a vertical cross-sectional view showing a state of the welding torch body and the fitting body at the time of welding the central corner portion according to the present embodiment. FIG. 5 is a sectional view taken along the line VV in FIG. Sixth
The figure is a longitudinal sectional view showing a state of the welding torch and the fitting body at the time of welding the right corner according to the present embodiment. FIG. 7 is a sectional view taken along the arrow VII-VII in FIG. The explanation will be given below.

In FIGS. 1 and 2, 1 is a welding wire, 2 is a welding torch body, 3 is a feeding roller, 4 is a welding tip which is a part of the welding torch body, and 5 is a welding tip 4 which is eccentric from the center and opened. Welding wire lead-out hole, 6 is the welding torch body 2
It is a fitting body fitted to. Reference numeral 7 is a hole which is a welding wire guiding means provided at a position apart from the center of the rotation axis of the fitting body 6 in parallel with the coaxial center. The welding wire guiding means 7 may be a groove. 8 is an arm fixed to a welding cart, 9
Is a welding wire reel, 10 is a cover which is integrated with the arm 8 and covers the rotating portion, 11 is a bearing for making the fitting body 6 rotatable, and 12 is a bearing for making the welding torch body 2 rotatable. Bearings, 13 is a motor mounted on the cover 10, 14 is a gear mounted on the rotating shaft of the motor 13, 1
5 is attached to the fitting body 6, gears meshing with the gear 14; 16 is attached to the welding torch body 2; gears meshing with the gear 14; 17 is a universal joint attached to the fitting body 6. , 18 is a conduit cable attached to the universal joint 17, and 19 is a supporting arm fixed to the arm 8 and supporting the feeding roller 3 and the welding wire reel 9. Further, in FIG. 3, reference numeral 31 shows the rotating direction of the welding torch main body 2, and 32 shows the rotating direction of the fitting body 6.

To explain the operation of this device, first, the welding wire 1
2 and 3, the welding torch main body 7 and the fitting body 6 are inverted from each other by the rotation of the motor 13 to be in the states of FIGS. 4 and 5, and when further rotated. As shown in FIGS. 6 and 7, the tip of the welding wire 1 is directed to the side opposite to the illustrated state of FIGS. 2 and 3. By this action, the motor 1 is changed from the state shown in FIG. 4 and FIG.
Weaving can be performed by continuously rotating the rotations of 3 forward and backward. In addition, the swing width of the tip of the welding wire 1 can be immediately changed by adjusting the rotation amount of the motor 13.

〔The invention's effect〕

As described above in detail, in the present invention, the amount of rotation of the welding torch body and the fitting body can be changed from the outside with good responsiveness, and in addition, the axis of the welding torch body has a shaft center on the end face for leading out the welding wire. Since the welding wire lead-out hole is provided at a position distant from the welding torch body, the swing width of the tip of the welding wire can be changed without a time delay even if the groove width changes rapidly. The proper arc position with respect to the wall surface can be easily maintained, and the occurrence of defective penetration can be prevented.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a consumable electrode welding torch according to an embodiment of the present invention, and FIG. 2 is a vertical sectional view showing a state of a welding torch main body and a fitting body at the time of welding at a left corner according to the present embodiment. FIG. 3 is a sectional view taken along the line III-III in FIG. 2, FIG. 4 is a longitudinal sectional view showing a state of the welding torch body and the fitting body at the time of central corner welding according to this embodiment, and FIG. FIG. 6 is a cross-sectional view taken along the line V-V in FIG. 6, FIG. 6 is a vertical cross-sectional view showing a state of the welding torch body and the fitting body at the time of welding the right corner according to the present embodiment, and FIG. Sectional view in the direction of the arrow, Fig. 8 is a sectional view of the conventional welding torch body with the welding wire linearly tilted in the welding direction, and Fig. 9 is the upper part of the conventional feeding roller with the welding wire bent. FIG. 10 is a cross-sectional view showing a state in which a welding wire is swung in a semi-circular arc with a conventional weaving bar. 1 ... Welding wire, 2 ... Welding torch body, 3 ... Wire feeding roller, 4 ... Welding tip, 5 ... Welding wire outlet hole, 6 ... Fitting body, 7 ... Welding wire guide hole, 8 ......
Support arm, 9 ... Welding wire reel, 10 ... Cover, 11
…… Bearing, 12 …… Bearing, 13 …… Motor, 14 …… Gear, 15 …… Gear, 16 …… Gear, 17 …… Universal joint,
18 ... Conduit cable, 19 ... Support arm, 21,
31 ... Welding torch body rotation direction, 22, 32 ... Mating body rotation direction.

Claims (1)

[Claims] 1. A hollow cylindrical welding torch body having a welding wire lead-out hole at a position away from the axis on an end face for leading out the welding wire, and a fitting body inserted in the welding torch body.
Welding wire guiding means bored in a position apart from the axis of the fitting body in parallel to the axis, the welding torch body and the fitting body, and the welding torch body and the fitting body around the axis. A consumable electrode welding torch comprising a means for reversing.