JPH0446680A - seam welding equipment - Google Patents

Abstract

PURPOSE:To obviate idle feed of a carriage frame and to shorten the welding time by providing rolling rolls respectively in front and in rear in the moving direction of the carriage frame of welding electrodes. CONSTITUTION:In the case of narrow lamp seam welding, the welding electrodes 4 and rolling rolls 5 at the rear position thereof are used to perform welding. Accordingly, welding is finished by making the carriage frame 1 to travel on the right on a base frame 2. At this time, the interval between rolling rolls 6 is extended. In the case of narrow lap seam welding with pre-lap operation, ends of materials 3 to be welded are then superposed on each other by minute dimensions. The carriage frame 1 is then moved to the right and rolled under the ordinary temperature by the rolling rolls 5 in rear of the welding electrodes 4 and the thickness of the superposed part is reduced. At this time, the welding electrodes 4 and the rolling rolls 6 are not operated. Afterward, the superposed quantity is reduced and then, the carriage frame 1 is moved on right and left and welding is performed by the welding electrodes 4 and continuously, a weld zone is smoothed by the rolling rolls 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a seam welding device used in a steel process line or the like.

[Conventional technology]

FIG. 2 is a block diagram showing the basic structure of a conventional seam welding device of this type disclosed in, for example, Japanese Patent Application Laid-Open No. 2-20669. ) is configured to be movable along the welding part of the welded material B). (2) is a pair of disc-shaped welding electrodes that are rotatably attached to the carriage frame (1), and by moving the carriage frame (1), the welding part of the workpiece (31) can be clamped from above and below. The roller rotates and receives power from a power supply (not shown) to apply electricity to the welding part to perform the welding (51 is a pair of disc-shaped rolling rolls rotatably attached to the carriage frame (1), By moving the carriage frame (1), the welded part of the material to be welded (31) is pressed and clamped from above and below with a predetermined pressure and rotated.

Next, the operation of so-called narrow lap seam welding, in which the ends of metal plates, which are materials to be welded, are welded by overlapping each other in minute dimensions, using the above-mentioned apparatus, will be described.

First, the ends of the clamped material to be welded (3) are cut with a shear (not shown), and the ends are overlapped to a minute dimension. From this state, the carriage frame (1) is moved from the illustrated position to the right on the base frame (2).

Along with this, the welding electrode (a) grips the welding part of the material to be welded B) from above and below, rotates and travels, and sequentially performs welding by applying current. The welded part is rolled and finished by the rolling roll (5) located behind the welding electrode (a). Therefore, the welding is completed by just one movement of the carriage frame (1) to the right at °C. is completed.

[Problem to be solved by the invention]

Incidentally, recently, narrow lap seam welding with pre-lap operation has been developed, which allows the welded part to be finished to a thickness that is almost the same as the thickness of the material. As shown in Figure 3, the process is as follows: First, the end of the clamped material to be welded B) is cut (a in the figure), then the minute dimensions are overlapped (b in the figure), and then the material is kept at room temperature. Once rolled, the thickness of the overlapped portion is reduced (C in the same figure). After that, after reducing the overlapping amount slightly, welding is performed using a welding electrode (d in the same figure), and finishing is performed by rolling (e in the same figure).
That is, the process shown in FIG. 3C is newly added.

When attempting to perform the new seam welding shown above using the conventional apparatus shown in Fig. 2, first the carriage frame (1) is moved to the right and the welded area is rolled by the rolling rolls (9). ) is completely traveled to its original position and the overlapping amount is slightly reduced, and then the carriage frame (1) is moved to the right again and welding by welding t & (a) and rolling roll (9) as before. and rolling process.

In this way, when performing narrow lap seam welding with pre-lap operation using conventional equipment, the carriage frame (1)
It is necessary to run the welding machine three times, and one of the runs is a complete waste of time due to the empty feed, resulting in a significant increase in welding processing time and a problem in that efficiency is reduced.

This invention was made to solve the above-mentioned problems, and it is possible to eliminate the need for empty carriage frame feeding, not only when performing normal narrow lap seam welding, but also when performing narrow lap seam welding with pre-plap operation. The object is to obtain a seam welding device that can shorten the time.

[Means to solve the problem]

The seam welding device according to the present invention has a rolling roll that
These are provided at the front and rear of the welding electrode in the moving direction of the carriage frame.

[Effect]

In the case of narrow lap seam welding, the carriage frame is moved and the welding area is first welded using a welding electrode.
Subsequently, rolling is performed using rolling rolls located at the rear thereof.

In the case of narrow lap seam welding with pre-lap operation, the carriage frame is moved and the thickness of the weld zone is first reduced by rolling with rolling rolls placed behind the welding electrode, where the materials to be welded are overlapped. Reduce the amount slightly. Subsequently, the carriage frame is moved in the opposite direction to weld the welded portion using a welding electrode, and then rolling is performed using the other rolling roll.

〔Example〕

FIG. 1 is a configuration diagram showing a seam welding apparatus according to an embodiment of the present invention. The only difference from the conventional method is that a rolling roll (6) is additionally provided at a position in front (to the right) of the welding electrode 4.

Next, the operation will be explained. In the case of narrow lap seam welding, the welding electrode (A) and the rolling roll (
51, welding is performed in exactly the same manner as in the conventional method. Therefore, the carriage frame (1) travels once to the right on the base frame (2) to complete welding. Here, the rolling rolls (6) are not operated and the interval between the rolls is widened.

Next, the operation in narrow lap seam welding with pre-lap operation will be described. The ends of the materials to be welded (31) are overlapped in minute dimensions.Then, move the carriage frame (1) to the right from the position shown in Figure 1, and move the rolling roll ((5) behind the welding electrode (a) The thickness of the overlapped portion is reduced by rolling at room temperature.

Therefore, the welding electrode (a) and rolling roll (6) are not operated in this step.

Thereafter, the amount of overlapping is slightly reduced, and then the carriage frame (1) is moved to the left. In this process, first, welding is carried out using a welding electrode (), and the welded area is rolled under high temperature by a rolling roll (6) located in the front (right) position to reduce the thickness of the welded part and smooth it. Therefore, the rolling rolls are not operated in this step.

As described above, narrow lap seam welding with pre-lap operation is completed by just one reciprocation of the carriage frame (1) on the base frame (2), eliminating wasted time due to idle feeding and significantly reducing processing time. Shortening is possible.

In addition, although the above embodiment describes a seam welding device used in a steel process line, this invention can be widely applied not only to a steel process line but also to narrow lap seam welding devices in the general metal processing field. be effective.

〔Effect of the invention〕

As described above, this invention provides rolling rolls at the front and rear positions of the welding electrode in the moving direction of the carriage frame, so that it is possible to perform both types of welding: narrow lap seam welding and narrow lap seam welding with bre-lap operation. In the apparatus that performs welding, there is no idle feeding process of the carriage frame, and the welding processing time is shortened.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a seam welding apparatus according to an embodiment of the present invention, FIG. 2 is a block diagram showing a conventional seam welding apparatus, and FIG. 3 is a diagram explaining a welding operation in the order of its steps. In the figure, (1) is a carriage frame, 0) is a material to be welded, (2) is a welding electrode, (c) and (6) is a rolling roll. Note that the same reference numerals in each figure indicate the same or corresponding parts. 1st Figure 1: Carriage frame 3: Material to be welded 4: Welding electrode 5.6: Rolling roll Figure 2 Figure 3 [=2222

Claims (1)

[Scope of Claims] A carriage frame provided so as to be movable along a welded part in which the ends of materials to be welded are overlapped by a predetermined dimension, and a carriage frame rotatably attached to the carriage frame, and as the carriage frame moves, the above-mentioned A pair of disc-shaped welding electrodes weld the welding part by holding the welding part from both sides and rotating while applying electricity, and a pair of disc-shaped welding electrodes that are rotatably attached to the carriage frame and perform the welding as the carriage frame moves. A pair of disc-shaped rolling rolls that rotate and press the parts from both sides, and perform both narrow lap seam welding and narrow lap seam welding with pre-plap operation, in which the rolling rolls are A seam welding device characterized in that the welding electrode is provided at the front and rear sides of the welding electrode in the moving direction.