JPH05337726A - Welding device - Google Patents

Abstract

PURPOSE:To make a groove formable in the upper part of a welded material by installing a shear which cuts a butt surface at a tilt angle with this surface. CONSTITUTION:In order to be welded to a butt surface in a state that an upper part is opened any way, this welder canes to have a tilt angle as a shearing method. Accordingly, when shearing is carried out from top to bottom by both upper and lower shears 2 and 7, it is recommended that the tilt angle of 0.5 deg. to 60 deg. is proper. So, at the time of butting, this welder is made possible to have a groove 8 in the upper part without fail, whereby penetration beads are apt to come into sight and, what is more, welding quality is made securable. Therefore any possible undercut will in no case occur in the lower part of a welded material 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding machine, and more particularly to a butt welding material in which each tip of a material to be welded is cut, butt welded and then welded.

[0002]

2. Description of the Related Art Generally, in a laser welding machine, butt welding of steel strips or the like is mainly performed. For example, as described in JP-A-57-171590, in a welding machine having upper and lower shears, first, shirring is performed from the upper side to the lower side, and then these welded materials (hereinafter referred to as plates). Butt welding is performed by using laser light and filler wire in combination with each other at a certain interval.

However, in these welding methods, there is a problem in the shirring itself. That is, as shown in FIG. 4 of the conventional example, it is understood that the method of vertically shearing from the upper side to the lower side always results in the cut surface 5 opened downward. That is,
Taking the cutting of a plate as an example, as shown in Fig. 5, about 1/3 of the upper part of the plate
Is the cut surface 5, the lower 2/3 is the fracture surface 6, and the upper shear
The board is constricted in the direction away from.

In order to prevent these problems, various measures have been taken to change the abutting gap between the plates and to narrow the clearance between the upper and lower shears so that the proportion of the cut surface 5 is as large as possible. However, these measures are not perfect, and as the plate pressure becomes thicker, it becomes difficult and the burden on the equipment increases.

[0005]

That is, the present invention is intended to solve the above-mentioned problems, and more specifically, a technique of shearing for inclining and cutting a shear angle in a butt welding machine is proposed. It is intended to be a suggestion.

[0006]

SUMMARY OF THE INVENTION The present invention is a butt welding machine for cutting and abutting each tip end of a material to be welded, and then welding the welded material, provided with a shear for cutting the abutting surface at an inclination angle with the abutting surface. Is characterized by.

The structure and the operation of the means of the present invention will be described in detail below.

[0008]

In the device of the present invention,
Since the welding is performed with the upper part opened, a certain inclination angle is used as the shearing method. In the case of shirring from the upper part to the lower part, an inclination angle of 0.5 ° to 60 ° is suitable, so that a groove (welding torch direction) can be always provided on the upper part at the time of butting. As a result, it becomes possible to secure the ease of the back bead and the welding quality.

The device of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a plan view showing one embodiment of the apparatus of the present invention, FIG. 2 is a longitudinal sectional view of a material to be welded cut by the apparatus of FIG. 1, and FIG. 3 is a view of the apparatus of FIG. It is a partially expanded longitudinal cross-sectional view of the welded part welded using, FIG. 4 is a top view of the apparatus of a prior art example, FIG. 5 is a vertical cross-sectional view of the to-be-welded material cut by the apparatus of FIG. 6 is a partially enlarged vertical sectional view of a welded portion welded using the apparatus of FIG. Reference numeral 1 is an upper clamp,
2 is an upper shear, 3 is a lower clamp, 4 is a material (plate) to be welded, 5 is a cut surface, 6 is a fractured surface, 7 is a lower shear, 8
Is a groove and 9 is an undercut.

FIG. 3 is a sectional view of a conventional welding machine, in which a material 4 to be welded is sandwiched between an upper clamp 1 and a lower clamp 3 and cut by an upper shear-2 and a lower shear-7. At this time,
As shown in FIG. 6, a cut surface 5 is seen in the upper part, and a fracture surface 6 is seen in the lower part. When welding, a lower open state occurs, and an undercut 9 is likely to appear as shown in FIG.

Contrary to this, in the welding machine of the present invention, as shown in FIG. 1, the upper shear 2 and the lower shear 7 are arranged inside the workpiece 4 with an inclination, respectively, and as shown in FIG. The shape of the welded material 4 having the groove 8 on the upper surface can be obtained. As a result, as shown in FIG. 3, a welding method in which the undercut 9 did not occur could be established.

Although this embodiment has been described for a guillotine shear, the same idea can be applied to a rotary shear, and the present invention is not limited to this.

[0014]

As described in detail above, according to the present invention, in a butt welding machine that cuts and abuts each tip of a material to be welded and then welds it, a shear for cutting the abutting surface at an inclination angle with the abutting surface. It is characterized by being provided.

Therefore, according to the present invention, it is possible to form a groove above the material to be welded, and thus, undercut is not generated below the material to be welded as in the conventional example, which is favorable. Welding is now available.

As a result, the reliability of the line welding machine is improved and the operation rate is improved.

[Brief description of drawings]

1 is a plan view showing one embodiment of the device of the present invention. FIG.

FIG. 2 is a vertical cross-sectional view of a material to be welded cut by the device of FIG.

FIG. 3 is a partially enlarged vertical sectional view of a welded portion welded using the apparatus of FIG.

FIG. 4 is a plan view of a conventional device.

5 is a vertical cross-sectional view of the material to be welded cut by the device of FIG.

FIG. 6 is a partially enlarged vertical sectional view of a welded portion welded using the apparatus of FIG.

[Explanation of symbols]

 1 Upper clamp 2 Upper shear 3 Lower clamp 4 Welding material (plate) 5 Cutting surface 6 Fracture surface 7 Lower shear 8 Groove 9 Undercut

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junichi Yamamoto 1 Kawasaki-cho, Chuo-ku, Chiba-shi, Chiba Kawasaki Steel Co., Ltd. Chiba Steel Works (72) Inventor Nio Yokozawa 1 Kawasaki-cho, Chuo-ku, Chiba-shi Kawasaki Steel Co., Ltd. Chiba Steel Works

Claims (2)

[Claims] 1. A butt welding machine that cuts and abuts each tip of a material to be welded and then welds the welded material, further comprising a shear that cuts the butt surface at an inclination angle with respect to the butt surface. .. 2. The welding machine according to claim 1, wherein the angle of inclination of the shear is 0.5 to 60 °.