JPS5932211B2 - How to manufacture bimetal products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a bimetallic product by cutting the product from a composite plate.

Among bimetals, so-called juxtaposed bimetals are constructed by joining two metal pieces with different coefficients of thermal expansion in parallel, and are used, for example, as support pieces for supporting the shadow mask of color television picture tubes.

In general, various methods can be considered when trying to obtain products using parallel bimetals from raw materials, but there are cases where the product shape is not just a regular rectangular piece but an irregular shape, or where a large number of products are to be obtained. In some cases, it is necessary to carry out effective material collection, taking into consideration the possibility of utilizing the remaining material after the product has been obtained. In particular, recently, in order to improve the joining method, a method has been used to obtain bimetallic products from a composite plate made by joining two strip metal plates side by side. The problem is how to extract materials economically and effectively.
The present invention has been made based on the above-mentioned circumstances, and provides a method for manufacturing bimetal products that can be formed using economical and effective material removal that can reuse the remaining material after the product is obtained from a composite plate. This is what we provide.

That is, the manufacturing method of the present invention is to obtain a composite plate by juxtaposing and joining two band-shaped metal plates with different coefficients of thermal expansion, and from this composite plate, a parallel bimetal product spanning the two metal plates is produced along the joining line. After that, the product is cut out along the width direction of the two metal plates in contact with both ends of the cutout metal plate space, so that the cutout remaining pieces of each metal plate are separated individually and simultaneously. This is what I did.

Embodiments of the present invention illustrated in the drawings will be described below.

An embodiment of the manufacturing method according to the present invention will be described with reference to FIG. 1. A strip metal plate 1 made of a metal having a high coefficient of thermal expansion, such as stainless steel, and a strip metal plate 2 made of a metal, such as upper, having a low coefficient of thermal expansion. The composite plate 3 is formed by arranging them side by side and joining their opposing side edges along the longitudinal direction by, for example, electron beam welding.

This composite plate 3 is subjected to a press punching process. A juxtaposed bimetal product 4 having a predetermined product shape, spanning the two metal plates 1 and 2 across the joining line AA', for example, a shadow mask support piece having the shape shown is cut out and formed. This product 4 is made by juxtaposing and joining together a metal piece 1a, which is a strip of metal plate 1 cut out along the joining line A-A', and a metal piece 2a, which is similarly cut out of metal plate 2 into a strip. It is something. After the product 4 is cut out and formed, a product-shaped space exists between the two metal plates 1 and 2, and both sides of each of the metal plates 1 and 2 that sandwich the metal plates 1 and 2 are cutout residues Ib. , 2b. Next, two portions of the metal plates 1 and 2 that are in contact with both ends of this space (that is, both ends in the longitudinal force direction) are cut by dipping in the width force direction of the metal plates 1 and 2. The cutting lines in this case are B-B' and C-C'. Therefore, the remaining piece 1b that is in contact with the space and sandwiched between the cutting lines B-B' and C-C' is cut off from the metal plate 1 as a section, and the remaining piece 1b that is in contact with the space and is sandwiched between the cutting lines B-B' and C-C' is cut off from the metal plate 2. The remaining piece 2b sandwiched between -B' and C-C' is cut off as a section. After separating the product 4 in this way, the remaining pieces 1b and 2 are obtained from the metal plates 1 and 2, respectively.
b can be separated and recovered individually and simultaneously, and the recovered remaining pieces 1b and 2b are melted and reprocessed to be used again as a juxtaposed bimetal material. In the process described above, products 4 overflowing in the longitudinal direction of the composite plate 3 are cut out and formed one after another, and at the same time, the remaining pieces 1b and 2b are cut off and collected. In addition, when overflowing from the composite plate 3 in the longitudinal direction and forming the cutout, the cutout portion of the product 4 may be directly adjacent to the cutting line B-B', C-C', or as shown in the figure. They may be placed adjacent to each other with an appropriate interval. The basic concept of the manufacturing method of the present invention is to cut out and form a product 4 from a composite plate 3 made by joining two metal plates 1 and 2.
As shown in the figure, it is also possible to cut out and mold a plurality of products 4 from the composite plates 3 of the composite set using a material obtained by joining two or more sets of composite plates 3 side by side.

Fig. 2 shows a case in which two sets of composite plates 3, 3 are juxtaposed and joined so that the two metal plates 1, 2 are arranged alternately.
Product 4 spanning each metal plate 1 and 2 for each joining line A-N of 2
A plurality of these are lined up and punched, and then the two points touching both ends of the space after punching of each product 4 are cured in the width force direction of each metal plate 1, 2, and cut along cutting lines B-B7, C-C'. When cutting, the remaining pieces 1b and 2b after the product 4 has been punched and formed can be separated and recovered from each metal plate 1 and 2 individually and simultaneously. In this way, if a plurality of products 4 are cut out and formed from a plurality of sets of composite plates 3 at once, the work can be carried out efficiently and is suitable for mass production. In the manufacturing method of the present invention, two metal plates 1 and 2 are used to form the composite plate 3 that is the material from which the product 4 is cut out.
The metal plates 1 and 2 are placed side by side and their joints are joined by welding, but since each metal plate 1 and 2 has a different coefficient of thermal expansion, the heat associated with welding causes each metal plate 1 and 2 to meander independently, resulting in welding. If it becomes difficult or the metal plates 1 and 2 meander,
This may cause problems such as joining.

Therefore, when joining the metal plates 1 and 2, welding may be performed using a force method that can eliminate such obstacles. Figure 3 shows an example of this, with two ordinary metal plates in the center.
The metal plate 2' with twice the width is placed, and the metal plates 1, 1 with the normal width are lined up on both sides and joined together by welding, and then the center of the metal plate 2' located in the center is By cutting along the longitudinal direction, the metal plate 2' is divided into two metal plates 2, 2 having normal width dimensions. Therefore, two sets of composite plates 3, 3 are obtained in which the metal plates 1, 1 located on both sides and the cut metal plates 2, 2 are joined together. In this force method, the metal plates 1, 1 are lined up and joined on both sides of the metal plate 2, so each metal plate 1, 1, and 2 restrains each other and its meandering is suppressed. 2 can be welded together well. Note that the combination of the metal plates 1 and 2 is not limited to this, for example, as shown in FIG.
The same thing can be said even if 2 are arranged alternately. As explained above, the method for manufacturing bimetal products of the present invention is to cut out and form a bimetal product from a composite plate in which two band-shaped metal plates with different coefficients of thermal expansion are juxtaposed, and then cut out and form the remaining pieces of each metal plate. They can be separated and recovered individually and simultaneously, and each recovered residual piece can be reused to produce each metal plate.

Therefore, material removal can be carried out economically and efficiently so that the remaining pieces of the composite plate can be recovered and reused.
Economical bimetallic products can be manufactured.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing the material extraction of a composite plate in one embodiment of the manufacturing method of the present invention, FIG. 2 is an explanatory diagram showing the material extraction of a composite plate in another practical example, and FIGS. 3A and b are FIG. 3 is an explanatory diagram showing an example of a sheet in which a composite plate is formed. 1, 2...Metal plate, 1a, 2a...Metal piece, 1b, 2b...Remaining piece, 3...
Composite board, 4...Bimetal product, A-N...
...Joining line, B-B', C-C7... Cutting line.

Claims (1)

[Claims] 1. A bimetallic product spanning the two metal plates is cut out along the joining line from a composite plate obtained by juxtaposing and joining two strip metal plates with different coefficients of thermal expansion, and then the product is cut out. A bimetal characterized in that the two metal plates are cut along the width direction in contact with both ends of the formed metal plate space, and the cutout remaining pieces of each metal plate are separated individually and simultaneously. How the product is manufactured.