JPH08294784A - Manufacture of metallic ring - Google Patents

Abstract

PURPOSE: To optimize the production of many kinds in small quantities of a great deal of metallic rings which is superior in precision and strength and made of special materials by bending a metallic material to form an annular body, abutting the end faces of this annular body and performing diffusion welding on these ends. CONSTITUTION: A square bar of metallic material 1 is bent annularly at a specific curvature to form a circular annular body 2, the both end faces 3, 4 of this annular body 2 are made close to face each other, and a circular ring is formed by performing diffusion welding on a slight gap between both end faces. In the diffusion welding between both end faces 3, 4 of the annular body 2, a thin film sheet 5 constituted of an amorphous alloy is fitted in the slight gap between both end faces first. Then, a pressure is evenly imparted in the left and right direction to this annular body 2 so as to stick the thin film sheet 5 with heating maintained until the sheet 5 is melted and diffused. With this heat treatment properly performed, the thin film sheet 5 is filtrated and diffused entirely and completely from the end faces 3, 4 to the joined part of the annular body 2 and welded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for economically producing a large number of various kinds of metal rings, especially a metal ring having a special cross section, in addition to mass-producing metal rings excellent in accuracy, strength and special material. Regarding

[0002]

2. Description of the Related Art Conventionally, the following method has been known for manufacturing a metal ring. One of them is a manufacturing method using steel pipes.
It is a method of manufacturing a metal ring by cutting this steel pipe,
Another is a method of manufacturing a metal ring by casting and forging, and another is a method of manufacturing a metal ring by flash butt joining. Conventionally, these three kinds of manufacturing methods have been known, but there has been no method for economically manufacturing high-mix low-volume production as well as mass production of metal rings having special dimensions and cross-sectional shapes.

[0003]

The method for producing a metal ring from a steel pipe has the advantage that the metal ring can be easily produced because the steel pipe is simply cut, but a steel pipe having the required inner and outer diameters can be obtained. There is a problem that it is difficult, and in the worst case, the number becomes large and the cost becomes high, and further, there is a problem that the sectional shape of the ring is limited to a square shape. The standardized steel pipe has a problem in that the size of the standardized steel pipe is determined step by step, so that a steel pipe of a size between the grades cannot be obtained. Therefore, there is a problem that nonstandard metal rings cannot be economically manufactured by this method. The manufacturing method by casting and forging has an advantage that it can be applied to a ring having a cross-sectional shape of a certain degree, but for that purpose, it was first necessary to prepare a mold suitable for the target shape and size. However, since this mold is costly, it is not possible to economically manufacture a wide variety of small quantities of metal rings, and a finishing allowance is added to all of the inner diameter, outer diameter, and thickness direction. There was a problem that

Therefore, in order to economically manufacture a wide variety of small quantities of a small number of metal rings made of a special material with all cross-sectional shapes excellent in accuracy and strength, the inventor of the present invention appropriately bends the metal material. We paid attention to the point that it is possible by combining with various welding means or coupling means. Conventionally, flash welding and friction welding have been known as welding means of this kind, and the manufacturing method by flash welding has already been put into practical use. Flash butt joining is a method of crimping end faces and end faces of a pair of metal materials that face each other, and heating and melting the crimped portions, which has the advantage that the finishing allowance can be reduced and the weight can be reduced. Since it has an arc shape, it is difficult to process an object having a small ring diameter, and it is difficult to join an object having a small ring diameter. Also, in this flash butt welding, in order to remove foreign matter on the joint surface,
There is a problem in that the joining material must be kept long, and burrs are formed at the welded portion, which requires man-hours for removing burrs, and in particular, man-hours for finishing with high accuracy result in high cost. Friction welding, for example, one of a pair of opposing metal material is fixed, the other metal material is rotated at high speed, and the fixed end face and the end face of high-speed rotation are crimped,
It was the method of welding by the frictional heat generated there. However, this friction welding has a problem that it cannot be used as a means for forming a ring because one or both of the metal materials are rotated at a high speed.

In recent years, for example, multi-purpose machines, devices and various high precision dedicated equipment have been actively developed. Therefore, non-standard metal rings excellent in strength and non-standard metal rings excellent in accuracy are Further, there is a problem that a metal ring made of a special material is required.

In order to solve the above problems and problems, the present invention is suitable for high-mix, high-mix, low-volume production of a large number of metal rings made of a special material with excellent accuracy and strength, and particularly for production of nonstandard metal rings. It is an object of the present invention to provide a method for manufacturing a metal ring, which is economically performed.

[0007]

In order to solve the above-mentioned problems and problems, the metal ring manufacturing method of the present invention forms a ring-shaped body by bending a metal material in an annular shape. A ring is formed by making the both sides face to face with each other and diffusing and joining the both end faces. A ring is formed by bending or bending a metal material in an arc shape to form an arc-shaped body, and making both end surfaces of each of the arc-shaped bodies face each other and bonding both end surfaces by diffusion bonding. To do.

[0008]

In the method for producing a metal ring of the present invention, the metal material is curved in an annular shape to form an annular body, and the end faces of the annular body are opposed to each other, and both end faces are diffusion-bonded. The end faces of the are uniformly joined to each other to form a ring having excellent strength and accuracy and having an irregular cross section.

[0009]

The method for producing the metal ring of the present invention will be described below with reference to the drawings. 1 to 3 show a process of forming the circular ring 7 shown in FIG. 3 by using the elongated metal material 1 shown in FIG. The metal member 1 is a square member whose both ends are square end faces 3 and 4, and is made of steel.
The metal material 1 is curved in a ring shape with a constant curvature, and
A circular annular body 2 shown in the drawing is formed.
Has their both end surfaces 3 and 4 arranged close to each other. A circular ring 7 is formed by diffusively coupling a slight gap between the both end surfaces 3 and 4.

When performing diffusion bonding between both end faces 3 and 4 of the annular body 2, first, a thin film sheet 5 made of an amorphous alloy is fitted into a slight gap between the both end faces 3 and 4. The thin film sheet 5 is formed by cutting an amorphous alloy formed into a sheet shape having a thickness of 20 to 40 μm along the end faces 3 and 4. Next, the thin film sheet 5 is pressure-bonded to the annular body 2 by uniformly applying pressure indicated by arrow lines A and A from the left-right direction in FIG. At this time, compressive stress is generated between the end face 3, the thin film sheet 5, and the end face 4. While maintaining this state, the pressure-bonded portion is heated and held until the sheet material melts and diffuses.

In this heat treatment, the heating temperature is 50 ° C. to 1 ° C. higher than the melting point of the amorphous alloy forming the thin film sheet 5.
It is preferable to set the temperature within a temperature range higher by 00 ° C.
If the heating temperature is set to a temperature about 50 ° C. higher than the melting point, the thin film sheet 5 melts at an appropriate speed, and the melted amorphous alloy forms the annular body 2 from the end face 3 and the end face 4. The metal material 1 that is formed permeates uniformly and diffuses. However, if the heating temperature is too high, the crystal phase of the metal material 1 will change. Further, it is necessary to shield with argon and nitrogen to prevent oxidation during heating.

If the above heat treatment is appropriately performed, the thin film sheet 5
The entire amount of the permeation completely permeates and diffuses from the end face 3 and the end face 4 into the joint portion of the annular body 2, and uniform diffusion bonding is performed. The surface of the joint is smooth, and the crystal phase of the metal material 1 is maintained as it is as the crystal phase in the joint. Furthermore, this annular body 2 is
Without undergoing thermal deformation in the process of this diffusion bonding,
The circular ring 7 shown in FIG. 3 is configured. This ring 7
Has a perfect circle on both the outer circumference and the inner circumference, and no trace of joining remains on the surface.

The metal material forming the ring is not limited to steel. It may be an iron material other than steel, a copper-based metal material, or a titanium-based metal material. For diffusion bonding, an appropriate amorphous alloy may be selected according to the type of these metal materials. The shape of the ring is not limited to the circular shape, and for example, an elliptical ring can be configured. Further, the metal material is not limited to the square material. For example, it may be a round bar or a plate. Since a long ring can be formed by using a plate-shaped metal material, the long ring may be cut to manufacture a metal ring having a required thickness.

4 and 5 show another embodiment. 4 and 5 show a process of forming a circular ring by using the pair of elongated metal members 1 and 1 shown in FIG. Each of the metal materials 1 and 1 is a square bar whose both ends are square end faces 3 and 4, and is made of steel. Each of the metal materials 1 and 1 is curved in an arc shape with a constant curvature,
The semicircular arcuate bodies 6, 6 shown in FIG. 5 are formed. The arcuate bodies 6, 6 are faced to each other, and both end surfaces 3, 3 and both end surfaces 4, 4 are brought close to and face each other. The thin film sheet 5 is interposed in a slight gap between the both end faces 3, 3 and the both end faces 4, 4 and the both end faces 3, 3 are formed by the above method.
Also, both ends 4 and 4 are diffusion-bonded to form a circular ring.

In this case, the metal material is not limited to a pair. For example, three pairs of metal materials may be used to form arcuate bodies each having an apex angle of 120 degrees, and both ends of the three arcuate bodies may be opposed to each other to form a ring. If a thick plate-shaped metal material is used in the above configuration, a nonstandard circular ring having a large difference between the outer diameter and the inner diameter can be manufactured. Further, in this case, it is not limited to the arcuate shape, and it is possible to manufacture any annular shape, for example, an elliptic shape or a polygonal shape.

[0016]

According to the method of manufacturing a metal ring of the present invention, a metal material is curved in an annular shape to form an annular body, and the end surfaces of the annular body are opposed to each other, and the both end surfaces are diffusion-bonded. Since the ring is configured, it has the effect of economically manufacturing metal rings of various sizes and shapes having non-standard outer and inner peripheries. When forming the ring, the end faces of the annular body are evenly joined, and the change of the crystal phase does not occur at this joined portion, so that there is an effect that a metal ring having excellent strength can be manufactured accurately. A metal material is curved in an arc shape to form an arc-shaped body, both end surfaces of each arc-shaped body are opposed to each other, and the both end surfaces are joined to each other by diffusion bonding to form a ring. Since this is done, there is an effect that a nonstandard metal ring can be manufactured.

[Brief description of drawings]

FIG. 1 is a perspective view showing a metal material used in the method for producing a metal ring of the present invention.

FIG. 2 is a perspective view showing an annular body formed by using the metal material shown in FIG.

FIG. 3 is a perspective view showing a ring formed by using the metal material shown in FIG.

FIG. 4 is a perspective view showing a pair of metal materials used in another embodiment.

5 is a perspective view showing a state where arcuate bodies formed by using the pair of metal materials shown in FIG. 4 face each other;

[Explanation of symbols]

 1 Metal Material 2 Annular Body 3 End Face 4 End Face 5 Thin Film Sheet 6 Arc Shaped Body 7 Ring

Claims (4)

[Claims] 1. A ring is formed by curving a metal material in an annular shape to form an annular body, making the end faces of the annular body face each other, and bonding both end faces by diffusion bonding. Method for manufacturing a metal ring. 2. A ring is formed by bending or bending a metal material in an arc shape to form an arc-shaped body, and making both end surfaces of each arc-shaped body face each other and diffusing and joining the both end surfaces. A method for manufacturing a metal ring, comprising: 3. The method for producing a metal ring according to claim 1, wherein the ring has a circular or elliptical shape. 4. The method for producing a metal ring according to claim 1, wherein the ring is a polygonal ring.