JPH0699279A - Horizontal welding method for large diameter stud - Google Patents

Abstract

PURPOSE:To perform horizontal welding of the large diameter stud to a steel wall by forming a groove part whose upper part is opened on a U-shaped par of a backing strip, performing flat arc welding and making the backing strip into a part of the steel stud. CONSTITUTION:An inclined groove is formed on an end of a stud 1. This inclined groove is made upward and the part except this groove part is subjected to horizontal stud welding. Afterward, the steel backing strip 6 composed of a cylindrical part and a U-inclined part is fitted into the inclined groove part of the stud 1. The groove part whose upper part is opened is formed by the steel wall 4, the inclined groove part of the stud 1 and the U-shaped part of the backing strip 6. Welding is then performed by flat shielded metal arc welding or gas shielded arc welding or no gas arc welding and horizontal welding of the large diameter stud is performed with the backing strip as a part of the steel stud. Consequently, strength of a stud main body can be reinforced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding method for laterally welding a steel stud having a relatively large diameter of 25 mm or more (hereinafter simply referred to as "stud") to a steel wall.

[0002]

2. Description of the Related Art Conventionally, in the case of laterally stud welding a stud to a steel wall, unlike the downward stud welding, the diameter of a stud that can be welded without defects is at most about 20 mm. In the case of stud welding, the welding needs to be performed by supplying a large current exceeding 2000 A, the amount of molten metal increases as the diameter of the stud increases, and the molten metal is laterally oriented, resulting in uneven thickness. However, there is a problem in that the stud cannot be welded to the steel wall reliably and stably by dropping or dropping.

For this reason, a welding method of rotating the stud during stud welding as disclosed in Japanese Patent Laid-Open No. 4-13482 and a method for stud welding as disclosed in Japanese Patent Laid-Open No. 48-56545 and Japanese Utility Model Laid-Open No. 55-71670. Consideration has been given to devising the shapes of jigs and ferrules. However, in the field of civil engineering, structures are becoming larger and stronger, and for this reason, studs in a horizontal position with respect to a steel wall need to have a larger diameter than that of the prior art.

[0004]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention The present invention has been studied variously in order to solve the above-mentioned problems of the prior art.
An object was to laterally weld a stud having a large diameter of 25 mm or more to a steel wall.

[0005]

According to the present invention, when a steel stud is laterally welded to a steel wall, the end surface of the stud to be welded is cut out to form an inclined groove, and the inclined groove is formed. Stud welding in a horizontal direction in advance except for the inclined groove portion, and then insert a steel backing plate made up of a cylindrical portion and a U-shaped portion into the inclined groove portion of the stud to form a steel wall. The stud inclined groove portion and the U-shaped portion of the backing metal form a groove portion having an open upper portion, and are welded downward by covered arc welding, gas shielded arc welding or no gas arc welding, and the backing metal is welded. It is a lateral welding method for large diameter studs, which is characterized in that it is a part of steel studs.

[0006]

The present invention will be described in more detail below with reference to the drawings. FIG. 1 shows a large-diameter stud having a diameter of 25 mm or more used in the present invention, 1 is a stud main body, 2 is an inclined groove provided on the end surface of the stud, and 3 is a stud welding surface having an area that can be stud welded by a conventional technique. This area is 31
If the inclined groove is formed so as not to exceed 5 mm ² , lateral stud welding can be reliably performed by the conventional technique.

FIG. 2 shows a situation in which the stud welding is performed laterally on the steel wall 4 by the conventional technique with the inclined groove portion of the stud facing upward, and 5 is the excess of the stud welding metal at that time. Figure 3 shows a steel backing plate 6 consisting of a cylindrical part and a U-shaped part.
A groove 7 is provided on the end surface of the U-shaped portion of this backing metal, and when this is fitted into the stud already welded to the steel wall as shown in FIG. Prevents interference with the wall.

FIG. 4 shows a state in which the backing plate is fitted into the stud, and a space part (groove part) where the upper part is opened by the steel wall surface, the inclined groove part of the stud and the U-shaped part of the backing plate. 8
It shows the situation in which is formed. Since the backing metal has a cylindrical portion, it can be set by inserting it into a stud welded sideways, so that molten metal does not flow down and tack welding is not necessary.

The inner diameter of the cylindrical portion may be made slightly thicker than the outer diameter of the stud so that it can be easily fitted into the stud. Further, the space portion is formed so that it can be welded in a downward posture. In the present invention, the space 8 formed by the inclined groove portion of the stud and the U-shaped portion of the backing metal is welded by the covered arc welding, the gas shield arc welding or the no gas arc welding, and the backing metal is attached. Finish the welding of the stud to the steel wall.

[0010]

As described above, according to the present invention, even if the diameter of the stud is increased, the stud tip is obliquely removed to the area where the stud welding can be performed by the conventional technique, and the stud welding is performed.
Since the space surrounded by the backing metal is arc-welded in a downward position that facilitates welding work, there is no problem of molten metal dripping, and the backing metal itself becomes part of the stud. The strength of can also be reinforced, and a large-diameter stud can be easily welded laterally to the steel wall.

[Brief description of drawings]

FIG. 1 is a perspective view of a stud used in the present invention.

FIG. 2 is an explanatory view showing a state in which a stud is laterally stud welded to a steel wall.

FIG. 3 is a steel backing metal used in the present invention.

FIG. 4 is a state diagram in which a backing metal is applied to a portion laterally stud welded to a steel wall.

[Explanation of symbols]

 1 Stud main body 2 Inclined groove provided on the stud 3 End surface of stud to be stud welded 4 Steel wall 5 Excessive metal for stud welding 6 Steel backing plate 7 Steel plate backing plate groove 8 Space for arc welding

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Suzuki 20-1 Shintomi, Futtsu City, Chiba Shin Nippon Steel Co., Ltd.

Claims (1)

[Claims] 1. When laterally welding a steel stud to a steel wall, the end face of the stud to be welded is cut out to form an inclined groove, and the inclined groove is directed upward.
After preliminarily laterally stud welding the portion excluding the inclined groove portion, the cylindrical portion and the U-shaped portion are formed in the inclined groove portion of the stud.
A steel backing consisting of a shaped part is fitted, and a groove with an open top is formed by the steel wall, the stud inclined groove and the U-shaped part of the backing, and the arc welding or gas shield is directed downward. Weld by arc welding or no gas arc welding,
A horizontal welding method for a large-diameter stud, wherein the backing metal is a part of a steel stud.