JPS58202988A - Production of parallel joined alloy plate - Google Patents

Abstract

PURPOSE:To produce a flat parallel joined alloy plate of dissimilar metals having no transverse curving and waving, by welding >=2 kinds of dissimilar metal rods under the exertion of the tensile forces corresponding to the differences among the respective coeffts. of thermal expansion and joining the same in parallel in the longitudinal direction thereof. CONSTITUTION:Dissimilar metallic rods 2a, 2b, 2c uncoiled from supply rolls 1a, 1b, 1c are passed through a tension bridle device 9 and are then positioned within the same plane in material holders 3; further, the side parts of the respective metallic rods are brought into contact with each other and are joined in parallel while the positions in the transverse direction are regulated with guide rolls 4. The parallel joined parts are welded with welding torches 5 of plasma welding or the like along the longitudinal direction of the metallic rods and after cooling with a cooler 6, the resulted parallel joined alloy plate is passed through bridle rolls 7 and is taken up with a take-up machine 8. The elastic strain corresponding to the coeffts. of thermal expansion is applied by tension on each of the rods 2a, 2b, 2c by the device 9, and is so set that the residual internal stress is minimized at the point of the time when the parallel joined alloy is cooled down to an ordinary temp.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a bonded metal plate, and more particularly to a method for manufacturing, for example, bimetal and other dissimilar metal bonding materials.

Traditionally, bimetals and other different types of bonding materials are
It was manufactured using the equipment shown in the figure. That is, the supply roll 11. The dissimilar metal strips 2a, 2b, and 2c wound around lb and lc are fixed in their vertical positions (positioned in the same plane) by passing through the material holding member 3, and tension is applied to the extent that the materials do not shift. It will be done.

The positions of the dissimilar metal strips arranged in this way in the width direction are then regulated by the idle rolls 4, and the 6-karat gold The bath contact positional relationship is ensured. Then, the dissimilar metal strip Fi and its welded portion are welded along the longitudinal direction by the corresponding # contact torch 5, and then cooled by the cooling device 6 to near room temperature.

The cooled bonding material passes through a priddle roll 7 that runs at a constant speed, and is wound into a coil by a winder 8. The joining of such dissimilar metal strips is
The bonding material is continuously driven by the priddle roll 7.

However, in the conventional method of joining dissimilar metals as described above, when different types of metal maple are joined by welding, a wavy shape or lateral bending of the material occurs after joining due to the difference in coefficient of thermal expansion of each. % to % When welding dissimilar metal strips with a large difference in thermal expansion coefficient, such as bimetallic materials, this phenomenon is so large that it is not possible to make a long product at one time.

Accordingly, an object of the present invention is to provide a method for manufacturing normally welded metal plates that prevents waving and lateral bending after welding due to differences in thermal expansion coefficients when dissimilar alloy plates are welded side by side.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the method for manufacturing a parallel bonded metal plate of the present invention will be explained in detail with reference to the accompanying drawings.

FIG. 2 shows an apparatus directly used for carrying out the method for manufacturing a parallel bonded metal plate according to an embodiment of the present invention. The same parts or corresponding parts as in the apparatus shown in FIG.

As shown in FIG.
A tension prydle device i19 for varying the tension of each metal strip is arranged between a, lb, lc and the material holding member 3.

As a result, tension is applied to each of the metal strips 2a, 2b, 2c between the metal thread running prydle roll 7 and the tension prydle device 9. Kono each gold striped stripe 2a,
The tension applied to 2b and 2c is each tension prydle roll and! :KEi][is.

In this way, the metal strips 2a, 2b, 2c, each of which is an alloy plate, to which a predetermined tension is applied are brought into parallel contact as explained with reference to FIG. The torch 5 welds the metal strip along its length. Welding at the time of Jin.

It can be by plasma welding, laser welding, or other welding.

In the manufacturing method of one embodiment of the present invention as described above,
Stainless steel (thermal expansion coefficient 130xlO/deg) and iron
Nickel alloy (coefficient of thermal expansion 15 x 10”/Qe
When welding 1. and g) in parallel, conventional methods cause bending and wavy shapes after welding due to the difference in their thermal expansion coefficients. ,,,A tension/ridle device that handles power failure distortion that corresponds to this difference in thermal expansion coefficient! Welding is performed while applying tension to each metal strip by t9, and the amount of elastic strain is selected so that the residual internal stress in the material is minimized when the normal weld is cooled to room temperature. Horizontal bending and waving of the welding edge can be eliminated.

As mentioned above, according to the method for manufacturing a normal bonded metal plate of the present invention, it is possible to manufacture a JII metal normal bonded metal in which the bonding material is flat after welding, and the shape correction process after welding is omitted. It is possible to provide an average weld with high precision of the 9-metal effect.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a conventional parallel bonded metal plate manufacturing apparatus, and FIG. 2 is a schematic perspective view of a parallel bonded metal plate manufacturing apparatus used in an embodiment of the present invention in the manufacturing direction of a parallel bonded metal plate. It is a perspective view showing 2 a e 2 b, 2 c...alloy strip, 5...
・Welding torch, 7...Pridle roll, 9...Tension/ridle device, In addition, the same reference numerals in each figure indicate the same or corresponding parts. Agent Shin Kuzuno −

Claims (1)

[Claims] In a method for manufacturing a parallel welded metal strip in which two or more dissimilar metal strips are welded side by side along their longitudinal directions, the metal strips are heated in a bath while applying a tensile force corresponding to the difference in thermal expansion between the dissimilar metal strips. A method for manufacturing a parallel bonded metal plate characterized by contacting the metal plate.