JPH05228635A - Welding method for damping-steel sheets - Google Patents

Abstract

PURPOSE:To provide the welding method for the damping-steel sheets where efficiency of welding work is enhanced and diffusion of heat at the time of welding can be suppressed as much as possible. CONSTITUTION:The joining ends of the damping-steel sheets 1 are abutted on each other, jigs 4 with water cooled jackets are abutted, respectively on both surfaces of the parts close to the joining ends in the vicinity of a weld zone (joining ends) of the damping-steel sheets 1 and the parts close to the joining ends are held between the jigs 4 with water cooled jackets. While cooling water is then poured from cooling water feeding ports 5a of water cooled jacket parts 5 of the jigs 4 with water cooled jackets, the cooling water is discharged from cooling water discharge ports 5b and welding is performed while the parts close to the joining ends of the damping-steel sheets 1 are cooled.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for welding vibration-damping steel plates, and more particularly, when damping vibration-damping steel plates are welded together or when a vibration-damping steel plate and a normal steel plate are welded to each other, it is necessary to control vibrations at positions other than the welding location. The present invention relates to a method for welding a vibration damping steel plate that prevents the vibration damping material in the vibration damping steel plate from being thermally damaged.

[0002]

2. Description of the Related Art In recent years, in automobiles, home electric appliances, etc., vibration-damping steel plates having vibration-damping and sound-absorbing properties have been used as parts to be used from the viewpoint of noise prevention. When manufacturing an assembly part of an automobile or the like using this damping steel plate, the damping steel plates may be welded to each other or the damping steel plate and a normal steel plate may be welded after press-molding the damping steel plate. However, the vibration-damping steel plate is usually made by interposing a vibration-damping film made of a soft material that absorbs vibration between the steel plates. The characteristics may deteriorate.

Therefore, in the past, when welding damping steel sheets,
A method has been adopted in which the vicinity of the welded portion of the vibration damping steel plate is covered with a cloth moistened with water so that the vibration damping material film at a portion other than the welded portion is not damaged by heat as much as possible.

[0004]

However, when the method is applied to a mass production process, it is necessary to wet the cloth with water every time welding is performed to cover the vicinity of the welded portion, which is troublesome. .. Further, a sufficient cooling effect cannot be obtained, and heat during welding may be diffused.

Therefore, it is an object of the present invention to provide a method for welding a vibration-damping steel sheet which can improve the efficiency of welding work and can suppress the diffusion of heat during welding as much as possible.

[0006]

In order to achieve the above object, the present invention is characterized in that, at the time of welding a vibration damping steel plate, a jig with a cooling jacket is brought into contact with the vibration damping steel plate in the vicinity of the welded portion. The present invention provides a method for welding a vibration plate.

[0007]

According to the present invention, the jig with the cooling jacket is brought into contact with the vibration damping steel plate in the vicinity of the welded portion during welding. And
For example, water or the like as a coolant is flown through the cooling jacket to cool the vicinity of the welded portion and prevent thermal damage to the damping material film in the vicinity thereof.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory sectional view showing an embodiment of a method for welding a vibration damping steel plate of the present invention.

First, referring to FIG. 1, a damping steel plate 1 and a jig 4 with a water cooling jacket used in the method of this embodiment will be described. The damping steel plate 1 is a damping material between thin iron plates 2 and 2. The sandwiching jig 4 with a water-cooling jacket having a film 3 interposed therein is provided with a water-cooling jacket portion 5 made of, for example, copper or a copper alloy having good thermal conductivity. A cooling water inlet 5a and a cooling water outlet 5b are provided on the end face.

Next, the welding method of this embodiment will be described. As shown in FIG. 1, the joining ends of the damping steel plates 1 are abutted against each other, and near the welding part (joining end) of the damping steel plate 1. A jig 4 with a water cooling jacket is brought into contact with both surfaces of a portion near the joint end, and the portion near the joint end is sandwiched by the jig 4 with a water cooling jacket, and then the water cooling jacket portion of the jig 4 with the water cooling jacket. While injecting cooling water from the cooling water inlet 5a of No. 5, cooling water is discharged from the cooling water outlet 5b, welding is performed while cooling the portion of the damping steel plate 1 near the joint end. In addition, reference numeral 6 in FIG. 1 is a weld metal.

Since the jig 4 with the water cooling jacket only clamps the portion of the vibration-damping steel plate 1 near the joint end in this way, the efficiency of the welding operation can be improved as compared with the case of covering with a cloth moistened with water. I can. Also, jig 4 with water cooling jacket
Cold water is flowing in the water-cooling jacket part 5 of the above, and it efficiently and surely removes the heat of welding, does not diffuse it to the part of the damping steel plate 1 near the joint end, and the damping material film 3 at the welding location is thermally damaged. Therefore, the deterioration of the vibration damping characteristics of the vibration damping steel plate 1 due to welding can be minimized.

FIG. 2 shows another embodiment of the welding method of the present invention. This embodiment shows a case where the joint ends of the damping steel plates 1 are partially overlapped and welded, and FIG. 1 shows that a jig 4 with a cooling jacket that spans both damping steel plates 1 is used. Although different from the embodiment shown, the others are the same.

The welding method of the present invention is not limited to the case of using the jig 4 with the cooling jacket having the structure shown in FIGS. Further, when there are few welding points and the amount of heat generated by welding is small, a jig with a water cooling jacket may be brought into contact with only one surface portion of the vibration damping steel plate,
It is not always necessary to clamp the vicinity of the welding location with a jig with a water cooling jacket.

[0015]

As described above, according to the present invention, the efficiency of welding work can be improved, and the diffusion of heat at the time of welding can be suppressed as much as possible. It is possible to suppress the decrease in the value as low as possible.

[Brief description of drawings]

FIG. 1 is an explanatory sectional view showing an embodiment of a method for welding a vibration damping steel plate of the present invention.

FIG. 2 is an explanatory sectional view showing another embodiment of the method for welding the vibration damping steel plate of the present invention.

[Explanation of symbols]

 1 Damping Steel Plate 3 Damping Material Film 4 Jig with Water Cooling Jacket 5 Water Cooling Jacket 6 Weld Metal

Claims (1)

[Claims] 1. A method for welding a vibration-damping steel plate, which comprises contacting a jig with a cooling jacket in the vicinity of a welded portion of the vibration-damping steel plate when welding the vibration-damping steel plate.