JPH0523853A - Welding speed controller for welding circular-arcuate part of large diameter square-shaped steel-frame column - Google Patents

Abstract

PURPOSE:To eliminated inconvenience caused by the difference between the welding speed on a welded joint and the welding speed on a traveling rail, namely, inconvenience that welding of a circular-arcuate part of a square column cannot be performed satisfactorily. CONSTITUTION:This welding speed controller is formed by combining 1.imit switches L and S fitted on a welding carriage 4 with devices to operate the above-mentioned limit switches L and S fitted on specified spots D and F on the traveling rail 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a column of a large-diameter rectangular steel frame column (hereinafter referred to as a square column) and a corner portion (R section) in horizontal horizontal automatic welding by consumable gas shielded arc welding or self-shielded arc welding of the column. ), That is, a welding speed control device for welding a circular arc portion.

[0002]

2. Description of the Related Art Conventionally, horizontal and horizontal welding of a column of a square column in a steel frame is generally thick, and therefore, semi-automatic welding by consumable gas shielded arc welding or self-shielded arc welding has been performed. However, in order to perform semi-automatic welding in horizontal horizontal welding, a high degree of skill is required, and in recent years, there is a shortage of skilled workers. Therefore, automation of horizontal horizontal welding of square columns has been desired.

The inventors of the present invention made an invention relating to an automatic welding apparatus and filed a patent application with the Patent Office on May 30, 1991.

The present invention has been made for the purpose of reducing the weight of an automatic welding jig and further reducing the number of workers, labor and time required for mounting the automatic welding jig. A rail receiving jig having a rail for a traveling device and a screw inside, a rotary knob for slide in which the rail receiving jig is screwed with the screw, a slide shaft, a linear bush and a plate surrounding the same, a spacer and a support plate. And a mounting jig consisting of a magnet, a bracket screwed onto the support plate, and a plate mounted on the bracket with a height-direction fixing blanker so as to rotate upward, an aluminum plate including a fixing plate and a rail positioning plunger. It consists of an alloy rail positioning jig and its combination.

[0005]

However, in the above-mentioned automatic welding apparatus, when the arc portion of the square column is welded,
The welding speed on the welded joint and the welding speed on the traveling rail are different, which is a disadvantage that good welding cannot be performed. Therefore, an object of the present invention is to eliminate the inconvenience that the welding speed on the welded joint differs from the welding speed on the traveling rail, that is, the inconvenience that the arc portion of the square column cannot be welded well.

[0007]

In order to achieve the above object, in the present invention, a limit switch attached to a traveling carriage and a limit switch attached to fixed points D and F on a traveling rail are operated. It has a configuration of a combination with the above device.

[0008]

And [action] device for actuating a limit switch attached to the point D on the running rail (dog), by the limit switch mounted on the traveling carriage, the speed V ₁ of the speed of the corner column from point A to point B The speed V ₂ from point D to point E can be further increased, and the speed can be decreased to the original value V _{1 at} point E as a result. Therefore, it was possible to perform good welding continuously with the straight part.

[0009]

EXAMPLES Examples will be described with reference to the drawings. In FIG. 1, a rail mounting jig 2 is installed on a corner column 1, a traveling rail 3 is attached equidistantly to each surface of the corner column 1, and a traveling carriage 4 is attached to the traveling rail 3 automatically. The whole figure of a welding device is shown.

Here, the welding torch 5 (shown in FIG. 2) attached to the traveling carriage 4 moves in the welding direction at the same speed as the traveling carriage 4 to perform welding, but automatic welding is performed by the square column 1.
It is necessary to continuously weld the straight line portion and the circular arc portion.

However, in the case of a straight line portion, that is, from the point A to the point B, the speed of the traveling carriage 4 to which the welding torch 5 is attached and the moving speed of the welding torch 5 from the point A to the point B (hereinafter referred to as welding speed). .) Are the same, but in the case of an arc of a square column, the welding speed at the distance l ₁ from the point B to the point C and the welding speed at the distance l _{2 from} the point D to the point E on the traveling rail 3 are the same time. As a result, the welding speed from point B to point C is from point D to E
It will be slower than the traveling speed of the truck that moves to the point. Therefore, good welding cannot be continuously performed.
FIG. 3 is an enlarged view of the arc portion of FIG. 1 so that the difference between the distances l ₁ and l ₂ can be clearly understood. Further, FIG. 4 shows the traveling speed of the carriage and the welding on the corner column 1 at this time. The change in speed is shown.

Therefore, in order to carry out good welding continuously, it is necessary to make the welding speed on the rectangular column 1 the same for both the straight line portion and the arc portion, and for that purpose, it is necessary to control the traveling speed of the carriage. The control of the traveling speed of the carriage is shown in FIG. Here, the traveling vehicle 4 can preset the speed change time from V _2, V ₂ from the two speeds and V ₁ of the speed V ₂ of the running speed V ₁ and the circular arc portion of the point B from point A to V ₁ mechanism Will have.

That is, the traveling carriage 4 traveling from the point A to the point B at the speed of V ₁ is a device for operating the limit switches (L, S) attached to the point D on the traveling rail 3. That is, the speed is increased to V ₂ by the time T ₁ preset by the signal from the dog and the limit switch (L, S) attached to the traveling carriage 4. Further, the traveling carriage 4 traveling in the traveling direction receives a signal from the limit switch by the dog attached to the predetermined point F on the traveling rail 3, and the speed of V _{1 at} the point E at the point E by the time of T _2. It means lowering the traveling speed of the truck.

[0015]

EFFECTS OF THE INVENTION Since the present invention has the above-described structure, by providing the welding speed control device of the present invention in the arc portion of the traveling rail attached to the corner column, the arc from the straight portion of the horizontal transverse welded joint of the corner column is provided. It became possible to carry out good welding work continuously from the curved portion and the arc portion to the straight portion.

[0016]

[Brief description of drawings]

FIG. 1 is an overall view of an automatic welding apparatus of the present invention.

FIG. 2 is a standing side view showing a state in which an automatic welding jig and a welding machine are attached to a square column.

FIG. 3 is an enlarged view of an arc portion of the square column of FIG.

FIG. 4 is a diagram showing changes in a carriage traveling speed and a welding speed on a square column.

FIG. 5 is a diagram showing control of the traveling speed of the carriage.

[Explanation of symbols]

 1 ··· Square column 2 ··· Rail mounting jig 3 ··· Traveling rail 4 ··· Traveling vehicle 5 ··· Welding torch L. S ... Limit switch

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Koichi Konno 5-5-12 Kitashinagawa, Shinagawa-ku, Tokyo Aichi Sangyo Co., Ltd. (72) Toshio Kato 5-5-12 Kitashinagawa, Shinagawa-ku, Tokyo Aichi Sangyo Co., Ltd. (72) Inventor Keiji Ono 5-5 Kita Shinagawa, Shinagawa-ku, Tokyo Aichi Sangyo Co., Ltd. (72) Inventor Takeo Murakami 8-21-1, Ginza, Chuo-ku, Tokyo Stock Association Takenaka Corporation Tokyo Main Store (72) Inventor Masanori Mamoru 8-21-1, Ginza, Chuo-ku, Tokyo Stock Company Takenaka Corporation Tokyo Main Store (72) Inventor Takeshi Numata 1-1 Komagome, Toshima-ku, Tokyo No. 15 Yayoi Construction Industry Co., Ltd.

Claims (1)

Claims: 1. A limit switch (L, S) attached to a traveling carriage (4) and the limit attached to a fixed point (D, F) on a traveling rail (3). A welding speed control device for welding an arc portion of a large-diameter rectangular steel frame column, which is combined with a device for actuating switches (L, S).