JPH09141364A - Production of thin-walled seamless ring and thin-walled seamless ring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a thin-walled seamless ring with a remalably easy method. SOLUTION: A work composed by laminating plural numbers of plates of metal protect materials being thicker than the thickness of a metal blank on upper and lower faces of the thin sheet of metal blank is deep-drawn and formed in a bowl like by a press machine A, after the metal protect materials 12', 13' are separated from the obtained forming product W', a bowl like metal blank 11' is taken out, a drum part of the bowl like metal blank 11' is sliced in a proper width dimension and the thin-walled seamless ring is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a thin-wall seamless ring and a thin-wall seamless ring.

[0002]

2. Description of the Related Art For example, a thin ring made of stainless steel or the like is often used as a cutter material used when forming a rectangular hole for mounting an outlet on a wall plate or the like. As a method for manufacturing the ring, there is a method in which a thin metal plate such as stainless steel is cut into strips and then the ends of the strips are welded to obtain a thin ring.

[0003]

Since the thin-walled ring obtained by the above-mentioned known manufacturing method has a seam at the welded part, when used as a cutter material, the seam becomes an obstacle or a crack is generated at the seam. There is a problem that it easily occurs.

As another method for obtaining a seamless thin-walled ring, there is a method of forming a plating layer on the surface of a ring-shaped core material and then melting the core material to produce a thin-walled ring composed of the plating layer. In this case, there is a problem that it takes a long time to form the plated layer and the obtained thin ring cannot be subjected to post-processing (eg, heat treatment).

The present invention has been made in view of the above points, and it is an object of the present invention to obtain a thin seamless ring by an extremely simple method.

[0006]

Means for Solving the Problems In the present invention, as means for solving the above problems, a plurality of plate-shaped metal protective materials having a thickness thicker than the metal material are provided on the upper and lower surfaces of the thin plate-shaped metal material. After laminating the work formed by a press machine into a bowl shape by deep drawing, and taking out the metal material shaped like a bowl by separating the metal protective material from the obtained molded product,
A thin seamless ring is obtained by slicing the body portion of the bowl-shaped metal material in an appropriate width dimension.

The thin seamless ring thus obtained is extremely suitable as a cutter material or a ring member because it has no seam.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Since this thin ring is to be manufactured using the press machine A shown in FIG. 1, the structure of the press machine A will be described first.

This press device A comprises upper and lower molds 1 and 2 which are provided so as to face each other. The upper mold 1 has a slide ram 3 which can be raised and lowered, and a lower surface of the slide ram 3. The lower die 2 is fixed to a base (not shown) while the fixed die 4 is fixed and the movable die 5 is arranged in a space surrounded by the fixed die 4. A bolster 6, a punch 7 fixed to the bolster 6 and facing the movable die 5, a blank holder 8 facing the fixed die 4 and movable up and down, and a blank holder 8
And a cushion pin 9 that is capable of moving downward. It should be noted that drive means for raising and lowering the upper mold 1 (specifically, the slide ram 3) is not shown.

Next, a detailed description will be given of a method for manufacturing a thin seamless ring, which is carried out by using the pressing device A.

First, on the upper and lower surfaces of a thin plate-shaped metal material 11, a plate-shaped metal protective material 12 having a thickness thicker than the metal material 11,
A work W formed by stacking 13 is placed on the blank holder 8 of the pressing device A (see FIG. 1). At this time, the upper die 1 is raised. As the metal material 11, it is desirable to use a thin plate made of stainless steel having a size of 0.3 mm or less, and as the metal protective materials 12 and 13,
A steel plate having a wall thickness of 1 mm or more is desirable. In addition,
The metal protective materials 12 and 13 may have the same thickness or different thicknesses, but the same thickness is preferable in that equivalent plastic deformation can be obtained. Further, the material of the metal material 11 may be stainless steel, copper, titanium or the like.
The material of 13 may be another metal.

Then, when the upper mold 1 is lowered, the work W is deep-drawn between the molds 1 and 2 to form a bowl-shaped molded product W '(see FIG. 2). At this time, metal material 1
Since 1 is deep-drawn while being sandwiched by the metal protective materials 12 and 13 and integrated, cracks and the like do not occur even if it is thin.

Thereafter, the bowl-shaped metal protective material 12 ', 13' is separated from the bowl-shaped molded product W'and the bowl-shaped metal material 11 '(see FIG. 3) is taken out. After that, the body portion of the bowl-shaped metal material 11 'is sliced in an appropriate width dimension as shown by a chain line to obtain a thin seamless ring B as shown in FIG.

That is, according to the present invention, the metal material 11
The thin seamless ring B can be obtained by a very simple method of performing deep drawing by the pressing device A and then slicing the laminated metal protective materials 12 and 13 in a laminated state.

The thin seamless ring B obtained as described above has excellent flexibility and is seamless.
For example, if a serration is formed on one end side, it is suitable as a cutter. Of course, this seamless ring B can also be used as a material other than the cutter material (for example, a ring member or the like). Further, in the case of the thin seamless ring B, there is an advantage that post-treatment (for example, heat treatment) can be freely performed.

In the above description, the metal material 11 is sandwiched between the two metal protective materials 12 and 13, but the number of metal protective materials may be three or more.

[0018]

According to the present invention, a thin metal material and a plurality of metal protective materials thicker than the metal material are laminated, deep-drawn by a pressing device, and then sliced. Since the thin-wall seamless ring is obtained, there is an excellent effect that the thin-wall seamless ring, which has been difficult in the past, can be obtained by an extremely simple method.

Since the thin seamless ring obtained as described above has excellent flexibility and is seamless, for example, if a serration is formed on one end side, it becomes suitable as a cutter, and as it is. It can also be used as a ring member.

Further, in the case of this thin seamless ring,
Post-treatment (for example, heat treatment) can be freely performed.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view showing a schematic configuration of a pressing device used in a method for manufacturing a thin seamless ring according to an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view showing a deep drawing state by a press device used in the method for manufacturing a thin seamless ring according to the embodiment of the present invention.

FIG. 3 is a vertical cross-sectional view of a bowl-shaped metal material that is an intermediate molded product obtained in the method for manufacturing a thin seamless ring according to the embodiment of the present invention.

FIG. 4 is a perspective view of a thin-walled seamless ring manufactured by the method for manufacturing a thin-walled seamless ring according to the embodiment of the present invention.

[Explanation of symbols]

11 is a metal material, 11 'is a bowl-shaped metal material, 12 and 13 are metal protective materials, A is a pressing device, B is a thin seamless ring, W is a work, and W'is a bowl-shaped molded product.

Claims (2)

[Claims] 1. A deep-drawing work using a press machine to form a bowl-shaped work on which a plurality of plate-like metal protective materials thicker than the metal material are laminated on the upper and lower surfaces of the thin-plate metal material. Then, after separating the metal protective material from the obtained molded product and taking out the metal material formed in a bowl shape, a thin seamless ring is obtained by slicing the body part of the bowl-shaped metal material in an appropriate width dimension. A method for producing a thin-walled seamless ring, which comprises: 2. A seamless ring manufactured by the manufacturing method according to claim 1.