JPH02133195A - Constraining device for welding - Google Patents

Abstract

PURPOSE:To easily constrain an object to be welded irrespective of its size by constraining a material to be welded by a constraining member by utilizing a magnetic action, on a pair of electromagnets which are placed in parallel in the welding direction at a prescribed interval and whose opposed parts become the same magnetic poles. CONSTITUTION:For instance, a pair of electromagnets 1 in which an N pole 8 is on both sides and an S pole 9 is in the center are placed at a prescribed interval on a jig 4 in parallel to the welding direction being the opposed parts as the same magnetic poles. On each electromagnet 1, an object to be welded 2 consisting of a non- magnetic material (Al material, etc.) is placed so as to form a weld zone 10, and by placing a constraining plate 3 on the object to be welded 2, the object to be welded 2 is constrained by attraction of the electromagnet 1. Also, to a part opposed to the weld zone 10 of each constraining plate 3, an auxiliary constraining tool 11 of a non- magnetic material is attached, and to the rear side of the weld zone 10, a backing plate 7 of a non-magnetic material is attached. By this constitution, a supporting device 5 is moved in the welding direction, and the weld zone 10 is welded by a welding torch 6. In such a way, even if the object to be welded 2 is a long-sized object, positioning can be executed easily, and the work can be executed efficiently.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a welding restraint device, and particularly to a welding restraint device suitable for welding workpieces made of non-magnetic materials.

[Conventional technology]

When joining metal materials by welding, welding deformation occurs, but in order to prevent this deformation, it is common practice to restrain the workpiece in advance and perform the welding operation. For example, a method has been implemented in which a plate material to be welded is fixed on a surface plate and an appropriate weight is added.

[Problem to be solved by the invention]

In the above-mentioned conventional technology, as the workpiece to be welded becomes larger, the restraining means becomes larger, and the restraining work is complicated and may require a great deal of labor and time. That is, when butt welding long thin plates, a heavy object or jig that restrains each thin plate must be placed over the entire surface of the thin plate. For this reason, when placing a heavy object, the milk object becomes very large, and a great deal of labor and man-hours are required to transport and position it. Further, when a jig is used, it is expected that the jig will be large and the operation of the restraint tool will be complicated. On the other hand, it is conceivable to simplify the restraints by dividing the welding part, but from the viewpoints of uniformity of welding conditions, automation of welding, relocation of restraints, etc., it is difficult to improve quality and work. It was difficult to find an advantage in terms of man-hours.

An object of the present invention is to provide a welding restraint device that allows work to be carried out efficiently regardless of the size of the workpiece.

[#! Means to solve JA problem]

The above purpose consists of electromagnets that are arranged parallel to the welding direction at a predetermined interval and whose opposing parts have the same magnetic pole, and a restraint that attracts the welded material in a divided state to the six electromagnets and has an opening in the welding part. This is achieved by constructing the structure from materials.

[For production]

``Since the workpiece can be restrained by adsorbing the restraining material with the workpiece interposed by an electromagnet, there is no need for the restraint material to be large and heavy. Moreover, the restraining material itself has no relation to other mechanical members.Therefore, even if the object to be welded becomes large, the work can be easily performed.

〔Example〕

Hereinafter, one embodiment of the restraint device according to Book 5 will be described with reference to FIGS. 1 and 2. In the figure, l represents an electromagnet arranged parallel to the welding direction at a predetermined interval, which will be described later. Reference numerals 2 denote objects to be welded which are respectively placed on the electromagnet 1 and welded together. The object to be welded is a non-magnetic material such as aluminum material, for example. Reference numeral 3 designates a restraining plate which is disposed on each of the objects 2 to be welded and is a restraining member that restrains the objects 2 by being attracted by the aiT ffi * magnet 1. Reference numeral 6 denotes a welding torch for performing IB welding of the arranged workpiece 2, and is supported by a support device 51 so as to be movable in the welding direction.

By the way, as the welding performed by the welding torch 6, for example, MIG welding or TIG welding is performed.

Reference numeral 7 denotes a backing plate disposed between the electromagnets 10 on the back side of the welded part 10 of the workpiece 2 to be welded, and is provided to prevent melting of the welded part 10 or to maintain the distance between the electromagnets 1 on both sides.

Further, the backing plate 7 is made of a non-magnetic material.

By the way, the electromagnet 1 is supported by the jig 4 in a state parallel to the welding direction as described above. The electromagnet 1 has a configuration in which, for example, a north pole 8 is placed on both sides and a south pole 9 is placed in the center so that the opposing portions have the same magnetic pole.

By arranging each electromagnet l in this way, magnetic blowing phenomenon of the arc can be prevented when arc welding the welding part 10 located at the center thereof. However, simply arranging the opposing parts of each electromagnet 1 so as to form an m-magnetic pole cannot prevent the magnetic blowing phenomenon, and the spacing between the electromagnets 1 can be adjusted according to the strength of the magnetic force of the electromagnet 1 to arc the lines of magnetic force. They must be placed at intervals that will not affect the environment.

Next, since the restraint plate 3 is also attracted and magnetized by the electrode stone 1, the magnetic field generated in the restraint plate 3 may cause a magnetic blowing phenomenon of the arc. Therefore, an auxiliary restraint tool 11 made of a non-magnetic material is integrally attached to the restraint plate 3 by bolts or the like at a portion of each restraint plate 3 facing the welded portion 10. That is, when restraining the workpiece 2, it is optimal to restrain it at the position closest to the welding part 10, but since the magnetic field of the restraining plate 3 has an effect as described above, it is not necessary to provide the auxiliary restraint device 11. to prevent the influence of magnetic field lines,
In addition, the structure is such that a position close to the welded portion 10 is restrained.

In such a configuration, the welding situation of the objects to be welded 2 will be explained. First, the spacing between the electromagnets 1 is determined and arranged in advance depending on the magnitude of the magnetic force required to restrain the workpiece 2 by the restraining plate 3, and the backing plate 7 is disposed between them. In this state, the workpiece 2 to be welded is placed on each electromagnet l, and then the workpiece 2 is placed on top of each electromagnet l. At this time, the object to be welded 2
The spacing between them and the spacing between the restraining plates 3 are determined respectively. Then, the electromagnet 1 is energized to attract the restraining plate 3 and restrain the workpiece 2 to be welded. In this state, the welding torch 6 welds the objects 2 to be welded.

According to such a configuration, the electromagnet l is fixed to the jig 4, the workpiece 2 to be welded is placed on the jig 4, the restraining plate 3 is further placed on top of the electromagnet 1, and the respective positions are determined so that the electromagnet 1 is not attached to the electromagnet 1. Welding work can be performed by turning on electricity. That is, even if the workpiece 2 to be welded is long, sufficient restraint force can be obtained even if the restraining plate 3 is relatively lightweight, so that workability can be improved.

In addition, since the restraining plate 3 itself is not configured to be mechanically connected to other members, welding work can be performed simply by placing it on the workpiece 2 and positioning it, and there is no incidental work associated with restraint, making the work simple. , and can be done easily. This means that
Further, this is particularly effective when the workpiece 2 to be welded is a long and wide flat plate, etc., and it is possible to prevent the restraint device from increasing in size. moreover,
Since the restraint plate 3 is absorbed by the electromagnet 1 and generates a restraint force, the distribution of the restraint force can be expanded from a point to a line or a plane, compared to mechanical restraint means. Thereby, reliable restraint can be performed without causing unnecessary damage to the workpiece 2 to be welded.

By the way, according to the above embodiment, the restraining plates are placed individually on both sides of the welded part, but they may also be connected to each other to facilitate positioning. Even if it is configured by providing a section, the same effect as the bait description can be achieved.

〔Effect of the invention〕

As explained above, according to the present invention, work can be carried out efficiently regardless of the size of the object to be welded.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a welding equipment equipped with an embodiment of the restraint device according to the present invention, and FIG. 2 is a sectional view taken along line 8-A in FIG.

Claims (1)

[Scope of Claims] 1. Electromagnets arranged parallel to the welding direction at a predetermined interval and having opposing portions having the same magnetic pole; and an opening in the welding part that is attracted to each electromagnet with a material to be welded interposed therebetween. A welding restraint device comprising a restraint member having: 2. The welding restraint device according to claim 1, wherein the restraint material is comprised of restraint plates separately installed on both sides of the welding part. 3. The welding restraint device according to claim 1, wherein the restraining member is made of a non-magnetic material near the welding part. 4. Electromagnets that are arranged parallel to the welding direction at a predetermined interval and whose opposing parts have the same magnetic pole; a plate member that is made of non-magnetic material and is arranged between the electromagnets; and a material to be welded on each of the electromagnets. 1. A welding restraint device comprising: a restraining member having an opening in a welded portion, the restraint member being adsorbed with the welding portion interposed therebetween.