JPH0976097A - L-shaped ceramics end tab for welding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a wasteful welding operation by providing a groove for holding a conductor on the inner side of a folding part of an L-shaped ceramics end tab for welding to generate the arc between the end tab and the groove. SOLUTION: A welding wire 7 of e.g. 5mm in diameter and 36mm in length is placed in a groove 4 for holding a conductor so that each end of the wire is slightly projected from an L-shaped ceramics end tab, and the welding wire 7 is fixed by a fixing jig and welded so that the wire is brought into contact with the base metal, i.e., a square steel column 8 whose one side is 210mm in length and an H-shaped steel beam 9. Arc can be generated between the end tabs, i.e., making advantage of the ceramics end tab and the steel end tab.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding ceramic end tab, and more particularly to an L-shaped welding ceramic end tab.

[0002]

2. Description of the Related Art Conventionally, in fillet welding, when welding is performed using a welding steel end tab or the like, as shown in FIG. 12, steel tabs 10 and 11 are welded to the starting and ending ends of the welding base materials 8 and 9. Then, welding is started from the tips of the steel tabs 10 and 11 and fixed to the ends.
After welding to the rear end of 11, the steel tabs 10 and 11 were separated from the welding base materials 8 and 9 and removed to complete the main welding.

When welding is performed using the ceramic end tabs for welding, as shown in FIG. 13, the L-shaped ceramic end tabs 12 for welding are used at the starting end and the terminating end of the welding base materials 8 and 9 by using a fixing jig (not shown). After that, an arc is generated from the start end side a little into the welding base metal 8 and 9 to start welding, and welding is performed to the middle of the L-shaped ceramic end tab on the start end side, and then folded back and fixed to the end. The L-shaped ceramic end tabs were welded to the middle, and then the L-shaped ceramic end tabs 12 were removed to complete the main welding.

Further, in the butt welding, when welding is performed using a welding steel end tab or the like, as shown in FIG. 14, the welding steel tabs 10 and 11 are welded to the base metal 8,
The welding was fixed to the start end and the end of No. 9 and welded in the same manner as in the above fillet welding, and then the steel tabs 10, 11 and the like were separated from the welding base material and removed to complete the main welding.

When welding is performed using the ceramic end tabs for welding, as shown in FIG. 15, V-shaped ceramic end tabs 13 for welding are used at the start and end of the welding base materials 8 and 9 by using a fixing jig (not shown). After that, an arc is generated from the start end side a little into the welding base metal 8, 9 to start welding, and welding is performed to the inside of the V-shaped ceramic end tab 13 on the start end side, and then folded back to the end. Fixed V
Type ceramic end tab 13 is welded to the inside and then
The type ceramic end tab 13 was removed to complete the main welding.

[0006]

However, when welding is performed using the above-mentioned conventional steel end tabs for welding, the steel end tabs are temporarily welded to the welding base metal in fillet welding and butt welding. They need to be fixed and these must be cut out after welding. Further, since the steel end tabs are welded to the welding base metal, there is a possibility that the welding base metal may be adversely affected by heat.

On the other hand, when welding is performed using the ceramic end tab for welding, since an arc cannot be generated from the ceramic end tab, an arc is generated at a point slightly entering the welding base metal from the starting end side to start welding, It was necessary to weld the ceramic end tabs on one side to the middle, and then to fold them back for welding, which was a waste of the welding operation. Further, the arc generated from the welding base material may have an unfavorable thermal influence on the welding base material. It is an object of the present invention to provide an L-shaped ceramic end tab for welding which is capable of generating an arc.

[0008]

In order to achieve the above object, in the welding L-shaped ceramic end tab of the present invention, a groove for holding a conductor is provided inside the bent portion of the L-shaped ceramic end tab for welding. That is. Further, in the L-shaped ceramic end tab for welding of the present invention, a groove for holding a conductor is provided inside the bent portion of the L-shaped ceramic end tab for welding, and the conductor is inserted in the groove for holding a conductor. is there.

In the L-shaped ceramic end tab 1 for welding of the present invention, the vertical portion 2 and the horizontal portion 3 may have a right angle as shown in FIG. 1, or as shown in FIGS. It may be smaller or larger than a right angle depending on the shape of the groove surface and the like. Further, the L-shaped ceramic end tab 1 for welding according to the present invention may be the one in which the lengths of the vertical portion 2 and the horizontal portion 3 are the same as shown in FIG. 5, or one of which is longer as shown in FIG. Good.

Further, in the L-shaped ceramic end tab 1 of the present invention, the vertical portion 2 and the horizontal portion 3 may have the same width as shown in FIG. 1 or different widths as shown in FIGS. 6 and 7. Further, the shape of the vertical portion 2 and the horizontal portion 3 of the L-shaped ceramic end tab of the present invention is such that even if the side surface is rectangular as shown in FIG. 3, a part thereof is the inclined portion 5 as shown in FIGS. 6 and 7. It may be one. The reason why the inclined portion 5 is provided is that the welding base materials 8 and 9 have protrusions and the like, so that the inclined portions 5 cannot be fixed to the welding base materials 8 and 9 in some cases.

Further, in the L-shaped ceramic end tab 1 of the present invention, as shown in FIGS. 10 and 11, the weld metal spreads to the inside of the vertical portion 2 and the horizontal portion 3 on the side of the welding base material or to the inside and the outside. The groove 6 for the weld metal may be provided so that it can be provided, or the groove 6 may not be provided. In addition, L of the present invention
The cross-sectional shape of the conductor holding groove 4 of the type ceramic end tab may be circular or other shapes. Further, the depth of the groove may be deep as shown in FIG. 5, shallow as shown in FIG. 6, or intermediate between these.

Further, the material of the conductor 7 of the L-type ceramic end tab 1 of the present invention may be either a welding wire or a steel material, but the composition does not change even if the welding wire is melted and mixed with the welding metal. Therefore, it is preferable. Since the conductor 7 needs to contact at least one of the welding base materials, it is preferably longer than the groove 4 for holding the conductor.

[0013]

Since the groove for holding the conductor is provided inside the bent portion of the L-shaped ceramic end tab for welding as described above, a conductor such as a welding wire can be inserted into the groove. Further, in the case where a conductor such as a welding wire is inserted in the groove, an arc can be generated between the conductor and the conductor, and it is not necessary to perform unnecessary welding operation unlike the conventional ceramic end tab. Further, since it is not necessary to generate an arc from the welding base material, there is no fear of exerting an undesired thermal influence on the welding base material.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. 1A is a side view showing an embodiment of the L-shaped ceramic end tab of the present invention, FIG. 1B is a front view, and FIG. 2 is the use of the welding L-shaped ceramic end tab shown in FIG. It is a perspective view for explaining a method. As an L-shaped ceramic end tab of the present invention, as shown in FIGS.
As shown, the vertical part 2 has a height of 45 mm and the horizontal part 3 has a length of 3
0 mm, a thickness of 8 mm, a width of 35 mm, and a diameter of the conductor holding groove 4 of 5 mm were manufactured.

A welding wire 7 having a diameter of 5 mm and a length of 36 mm is inserted in the groove for holding the conductor so that both ends thereof slightly project from the L-shaped ceramic end tabs. As shown in FIG. Is fixed with a fixing jig (not shown) so as to come into contact with a square steel column 8 having a side of 210 mm and a width 210 mm, and an H-shaped steel column beam 9 having a thickness of a web and a flange of 18 mm. An arc was generated at the tip of the welding wire 7 put in the groove 4 to perform normal welding. After welding, the ceramic end tab 1 was removed, unnecessary weld metal was removed, and the welded portion was observed. As a result, there was no problematic defect.

Embodiment 2 FIG. 3 (a) is a side view showing another embodiment of the L-shaped ceramic end tab of the present invention, FIG. 3 (b) is a front view, and FIG. 4 is the welding L-shaped shown in FIG. It is a perspective view for explaining how to use a ceramic end tab. FIG. 3A shows an L-shaped ceramic end tab for welding according to another embodiment of the present invention.
As shown in (b) and (b), a vertical portion 2 having a height of 50 mm, a horizontal portion 3 having a length of 40 mm, a thickness of 15 mm, a width of 55 mm, and a groove 4 for holding a conductor having a diameter of 6 mm are manufactured. A welding wire 7 having a diameter of 6 mm and a length of 57 mm was inserted into the above so that both ends thereof slightly protrude from the L-shaped ceramic end tabs.

This L-shaped ceramic end tab 1 has a height of 4
20m, width 210mm, web and flange thickness 1
It is used for fillet welding of a web 8 and a flange 9 of an 8 mm H-shaped column as shown in FIG. 4, and an arc is usually generated at the tip portion of the welding wire 7 put in the groove 4 for holding a conductor. Was welded. After welding, the ceramic end tab 1 was removed, unnecessary portions were removed, and the welded portion was observed.
There were no flaws in question.

The invention of the present application is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the invention.

[0019]

According to the present invention, the L-shaped ceramic end tab for welding has the above-described structure, and thus has the following excellent effects. (1) By providing a groove for holding a conductor inside the bent portion of the L-shaped ceramic end tab for welding, a conductor such as a welding wire can be inserted into the groove.

(2) In the case where a conductor such as a welding wire is inserted into the groove, the advantage of the ceramic end tab, that is, the advantage of the steel end tab, that is, an arc can be generated between it and the conventional ceramic end tab. Since it is not necessary to perform useless welding operation as described above and it is not necessary to generate an arc from the welding base metal, there is no possibility of exerting an undesired thermal influence on the welding base metal.

(3) Since it is not necessary to tack-fix the welded base material to the welded base material like the steel end tabs, it is not necessary to cut them off after the welding, and there is a risk that the welded base material is unfavorably affected by heat by welding. Absent.

[Brief description of drawings]

FIG. 1 is a front view and a side view showing an embodiment of an L-shaped ceramic end tab for welding according to the present invention.

FIG. 2 is a perspective view for explaining a method of using the L-shaped ceramic end tab for welding shown in FIG.

FIG. 3 is a front view and a side view showing another embodiment of the L-shaped ceramic end tab for welding according to the present invention.

FIG. 4 is a perspective view for explaining a method of using the L-shaped ceramic end tab for welding shown in FIG.

FIG. 5 is a perspective view of another embodiment of the L-shaped ceramic end tab for welding according to the present invention.

FIG. 6 is a perspective view of another embodiment of the L-shaped ceramic end tab for welding according to the present invention.

FIG. 7 is a perspective view of another embodiment of the L-shaped ceramic end tab for welding according to the present invention.

FIG. 8 is a perspective view of another embodiment of the L-shaped ceramic end tab for welding according to the present invention.

FIG. 9 is a perspective view of another embodiment of the L-shaped ceramic end tab for welding according to the present invention.

FIG. 10 is a perspective view of another embodiment of the L-shaped ceramic end tab for welding according to the present invention.

FIG. 11 is a perspective view of another embodiment of the L-shaped ceramic end tab for welding of the present invention.

FIG. 12 is a perspective view for explaining fillet welding using a conventional welding steel tab.

FIG. 13 is a perspective view for explaining fillet welding using a conventional L-shaped ceramic end tab for welding.

FIG. 14 is a perspective view for explaining butt welding using a conventional welding steel tab.

FIG. 15 is a perspective view for explaining butt welding using a conventional V-shaped ceramic end tab for welding.

[Explanation of symbols]

 1 L-shaped ceramic end tab for welding 2 Longitudinal part 3 Horizontal part 4 Groove for holding electric conductor 5 Sloping part 6 Groove for welding metal 7 Conductor 8, 9 Welding base metal 10, 11 Steel tab 12 Conventional L-shaped ceramic for welding End tab 13 V type ceramic end tab for welding

Claims (2)

[Claims] 1. An L-shaped ceramic end tab for welding, characterized in that a groove (4) for holding a conductor is provided inside a bent portion of the L-shaped ceramic end tab for welding. 2. A groove (4) for holding a conductor is provided inside a bent portion of an L-shaped ceramic end tab for welding, and a conductor (7) is inserted in the groove for holding a conductor. L-shaped ceramic end tab for welding.