JPH0513691U - Welding end tab - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an end tab that does not need to be filled with a gap when welding a joint of the same width, and that can effectively prevent an arc drop or drop. [Structure] A refractory end tab used for welding a joint portion in which at least one base material is not formed with a grooved surface and the base materials are butted against each other with their end faces in the plate width direction aligned with a non-use surface (weir) 4 ₂ substantially corresponds to the welding using surface 4 ₁ and on both sides to, and non-use surface having no base metal and beveling surface (weir) 4 _2, open The shape is provided with falling-off preventing leg portions 4 ₄ that extend beyond the level of the front bottom portion. It is preferable that the dam portion on the side of the base metal having no groove processed surface is formed with an inclined surface 4 ₃ following the welding use surface except for the fall-prevention leg portion. The welding surface can be formed on one side or both sides. It can also be applied to end tabs that have no weir as a non-use surface. Further, both base materials can be applied to an I-shaped joint structure in which there is no groove processed surface, and in this case, legs are provided on both unused surfaces.

Description

[Detailed description of the device]

The present invention relates to a welding end tab, and more particularly to a refractory end tab capable of preventing slipping out when butt welding a base material with the end faces in the plate width direction aligned.

[0002]

[Problems to be solved by conventional techniques and devices]

 When the structure of a welded joint is roughly classified, in general, there is a slight difference between the case where the base metal has the same plate width and the case where the base metal has a different plate width.

That is, when the base materials have the same plate width, as shown in FIG. 1, one base material 1 (in the case shown, a base material having a groove processing surface 1 ₁ ) and the other base material 2 ( In the case shown in the figure, when the base metal that does not have a groove-processed surface is abutted, the base metal end faces are abutted in the state of being aligned on the same surface in the width direction, but when the base metal has a different width. As shown in FIG. 2, generally, the center of one of the base materials 1 (in the case of the drawing, the base material having the grooved surface 1 ₁ ) and the center of the other base material 2 are aligned and butt-matched. Therefore, the end faces of the base metal are abutted in a state that they are not aligned on the same face in the plate width direction. However, as shown in FIG. 3, even when the base materials have different plate widths, the end surfaces of one base material 1 and the other base material 2 are aligned on the same surface in the width direction as in FIG. Sometimes they are butt-matched.

As described above, the joint structure includes a joint structure (referred to as “same width joint”) in which the base material end faces are aligned as in the case of FIGS. 1 and 3, and the joint structure of FIG. There is a joint structure (referred to as "different width joint") that is abutted in such a state that it is not aligned.

By the way, in the case of welding the latter different-width joint, when the backing metal is attached to the groove bottom and the end tabs are brought into contact with the joint ends, the end tabs are placed on the backing metal at the joint end. Since the side surface of the end tab comes into close contact with the other base material, there is no gap at the end of the joint.

However, when welding the former same-width joint, as shown in FIG. 4, when the backing plate 3 is attached to the groove bottom and the end tab 4 is brought into contact with the joint end, the joint end is welded. although end-tab 4 rests on the backing metal 3, so the dam portion 4 ₂ of the end-tab 4 is only in contact with the other end face of the base material 2, a gap (figure groove bottom portion of the other base metal In the middle, part A) occurs. When welding such a joint structure, it is necessary to pay close attention because an arc is likely to escape or fall out in this gap.

In the case of semi-automatic welding, since the main welding is performed after filling the gap, it is possible to prevent the arc from falling out and the falling out. However, in the case of arc robot welding, since there is no construction to fill this gap, there was a problem that the arc would drop out or fall out during weaving immediately after the arc start.

The above-described joint structure has been described for the case where the groove has a V shape, but a joint structure in which both base materials are abutted without forming a groove processed surface, that is, a joint structure of I type There was a similar problem in the case.

The present invention has been made in view of such a situation, and its purpose is to fill gaps when welding same-width joints, whether arc robot welding or semi-automatic welding. It is an object of the present invention to provide an end tab that does not need to be removed and that can effectively prevent the arc from falling out or falling out.

As a result of earnest studies to solve the above problems, the present inventor has found that the problem can be solved by modifying the shape of the end tab, and has completed the present invention.

That is, the present invention is a refractory material used when welding a joint portion in which at least one base material is not formed with a groove processed surface and the base materials are butted against each other with their end faces in the plate width direction aligned. In the end tabs made by welding, the non-use surface on the base metal side, which has the welding use surface that almost corresponds to the groove cross section and the non-use surfaces on both sides of it, and has no groove processed surface, has the groove bottom level. The gist of the present invention is a welding end tab, which is characterized in that it has a fall-prevention leg portion that extends beyond.

Hereinafter, the present invention will be described in detail with reference to the drawings.

[0013]

【Example】

In general, the end tab will be described by taking as an example the case where it is used when welding a joint structure having a V-shaped groove as shown in FIG. 4. As shown in FIG. The use surface 4 ₁ and weir portions 4 ₂ are provided on both sides of the use surface 4 _1, and the inside of the weir portion 4 ₂ has a shape in which an inclined surface 4 ₃ is formed following the welding use surface 4 ₁ .

According to the research conducted by the present inventor, it was found that when the end tab having such a shape is attached, a gap is formed between the end tab and the base material due to a problem in the shape and size of the dam portion of the end tab. .. That is, since the weirs on both sides are designed to have the same level of height, even if a backing metal is attached, some gap will be created between the weir and the base metal that does not have a grooved surface. did. Therefore, in order to eliminate this gap, it was found that the length of the dam portion on the base metal side having no groove processed surface is extended downward.

In the present invention, the end tab is formed in a shape that can exert the same effect as in the case of welding with different widths.In short, a leg portion for preventing slipping out is provided on a non-use surface (eg, a weir portion) of the end tab. It is provided. FIG. 5 is a view showing an example of the end tab of the present invention and an example of its use. The end tab 4 is an end tab of a type having a weir portion, but the weir portion 4 on the base material side that does not have a groove processing surface. ₂ is of a shape with anti legs 4 ₄ falling out was extended to length downwardly beyond the groove bottom level. Since the leg 4 ₄ is provided on the end-tab, no gap is formed between the end-tab 4 and the beveling surface having no base material 2.

FIG. 6 shows an example of the end tab of the present invention, which is an end tab of a type having a weir portion, in which weir portions 4 ₂ are provided on both sides of the welding use surface 4 ₁ , and each weir portion is provided. An inclined surface 4 ₃ is formed inside 4 ₂ and continues from the welding use surface 4 ₁ . Furthermore, one of the dam portion 4 _2, have been extended downward, the legs 4 ₄ is formed. The length of the leg portion 4 ₄ is not particularly limited, but may be about 12 mm, for example.

The shape, size, material and the like of the refractory end tab may be the same as the conventional one as long as it has such a leg portion. For example, the end tab in FIG. 6 has welding surfaces on both sides, but as shown in FIG. 7, an end tab having a welding surface on only one surface is also possible. Further, the shape of the welding use surface is V-shaped in the case of FIG. 6, but it may be a curved shape, in short, as long as it has a shape substantially equal to the groove cross section. Also, the entire shape of the end tab may be a right angle (see FIG. 8), or a conical or elliptical shape.

It should be noted that an inclined surface may be provided on the upper corner portion 5 of the leg portion 4 ₄ (see FIG. 6) similarly to the weir portion 4 _2. It is preferable not to provide. In addition, a cut surface (corner drop) may be formed at each corner of the end tab, or may be left as a corner that is not formed.

The height of the end tabs (upper end) is usually the same as the height of the base material (upper end), but the upper end of the end tabs is made higher so that a portion corresponding to the extra portion is formed. End tabs of the type provided are also possible.

Further, in the above-mentioned embodiment, the end tab of the type in which the weir portion is provided as the non-use surface is described, but the type in which the weir portion is not provided in the non-use surface, that is, the non-use surface, is not used. The present invention can also be applied to an end tab of a type in which the surface is formed in the same plane as the welding surface. For example, as shown in FIG. 9, the non-use surface 4 ₂ is divided on the same plane on both sides of the welding use surface 4 ₁ , and the leg portion 4 ₄ may be formed on one non-use surface 4 _2. it can.

Furthermore, also, in the above-described embodiment, irrespective of the presence or absence of the weir section has described the case of providing the leg portions 4 ₄ on one of the non-use surface, beveling surface for both the base material Needless to say, when used for welding an unformed joint structure, that is, a I-shaped joint structure, legs can be provided on both non-use surfaces.

When the end tab of the present invention is used, it can be used in the same manner as the conventional end tab, and the bottom surface (bottom surface without legs) of the end tab is placed on the backing plate or the same as the backing plate. Just set it to height. It is desirable to overlap the weir part on the base material by about 2 mm.

[0024]

[Effect of the device]

 As described in detail above, according to the present invention, the end tabs are provided with the slip-out preventing legs, so that the slip-out can be effectively prevented during welding of the same width joint. It is particularly suitable for arc robot welding, but even in semi-automatic welding, the conventional work of filling gaps is not required. Since the end tab is made of refractory, it can be used repeatedly and is economical.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a joint portion (joint having the same width) when base materials having the same width are butted.

FIG. 2 is a diagram for explaining a joint portion (different-width joint) when base materials having different widths are butted.

FIG. 3 is a diagram illustrating a joint (same width joint) in a case where base materials having different widths are butted to each other and end faces of the base materials are aligned.

4A and 4B are diagrams showing an example of a conventional end tab and an example of use thereof, in which FIG. 4A is a plan view and FIG. 4B is a side view.

5A and 5B are views showing an example of an end tab of the present invention and an example of use thereof, in which FIG. 5A is a plan view and FIG. 5B is a side view.

FIG. 6 is a view showing an example of an end tab of the present invention, (a) is a perspective view, (b) is a side view, and (c) is a plan view.

FIG. 7 is a perspective view showing another example of the end tab of the present invention.

FIG. 8 is a perspective view showing another example of the end tab of the present invention.

FIG. 9 is a view showing an example of an end tab of the present invention, (a) is a perspective view, (b) is a side view, and (c) is a plan view.

[Explanation of symbols]

1 Base material (base material with groove processed surface) 1 ₁ Groove processed surface 2 Base material (base material without groove processed surface) 3 Backing metal 4 End tab 4 ₁ End tab welding surface 4 ₂ End tab Non-use surface (weir) 4 ₃ End tab inclined surface 4 ₄ End tab fall-out prevention leg

Claims (5)

[Scope of utility model registration request] 1. A refractory end tab used for welding a joint portion in which at least one base material is not formed with a groove processed surface and the base materials are butted against each other with their end faces in the plate width direction aligned. The non-use surface on the base metal side, which has a welding use surface that almost corresponds to the tip cross section and non-use surfaces on both sides and has no groove processing surface, extends beyond the groove bottom level and prevents slipping out. A welding end tab having a shape with legs for welding. 2. An inclined surface following the welding use surface is formed on the weir portion on the base metal side where the non-use surface forms a weir portion and does not have a groove processing surface, except for the slip-out prevention leg portion. Claim 1
The welding end tab described in. 3. The welding end tab according to claim 1, wherein the non-use surface is flush with the welding use surface. 4. The welding end tab according to claim 1, 2 or 3, wherein the welding use surface is formed on one side or both sides. 5. The welding end tab according to claim 1, which is used for arc robot welding.