JPH0366919A - Sliding bearing and manufacture thereof - Google Patents

Abstract

PURPOSE:To facilitate the manufacture of the sliding bearing with grooves by making the groove sections of the bearing of material other than the material of a bearing body and forming the grooves by melting another material and using it. CONSTITUTION:Grooves 3 for lubrication are provided on the internal peripheral sliding surface 2 of a cylindrical bearing body 1. For example, carbon or carbon in which tar pitch is impregnated is used for the bearing body 1 and glass fiber is for groove sections 3. Both materials a layered so as to be formed into a cylindrical form for bearing material with the end faces of both material exposed. When this material is dipped in the water solution of hydrofluoric acid to melt the glass fiber, the grooves 3 are formed. This obviates the machining resulting easy manufacture of the sliding bearing.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a sliding bearing, and more particularly to a sliding bearing having grooves provided on the surface of the bearing, and a method for manufacturing the same.

(Prior Art) As a conventional slide bearing of this type, there is one shown in FIG. 6, for example. That is, the cylindrical wheel support body 10
A groove 102 is provided on the inner peripheral sliding surface 101 of 0, and the groove 102
Lubricating oil or the like is poured into the sliding surfaces to lubricate the sliding surfaces. Such a groove 102 has been manufactured by machining the inner periphery of a cylindrical bearing material.

(Problem to be Solved by the Invention) However, in the case of the above-mentioned conventional technology, although it is relatively easy to process grooves on the inner circumference of short bearings,
Grooving was difficult in the case of long bearings. In addition, the groove machining on the inner periphery varies depending on the processing machine and the processing skill of the engineer, and there are restrictions on machining.Furthermore, if the shape of the groove 102 is complex, it is not possible to machine the inner periphery. It was difficult.

The present invention has been made to solve the problems of the prior art described above, and its purpose is to provide a sliding bearing in which surface grooves can be easily manufactured by melting the material, and a method for manufacturing the same. There is a particular thing.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, in a sliding bearing having a groove on the surface of the bearing body, the groove portion of the bearing body is made of a material different from that of the bearing body. The groove was formed by melting only the different type of material.

Further, the manufacturing method of the present invention includes forming a cylindrical bearing material using two types of materials, exposing the two types of materials on the inner periphery of the bearing material, and melting only one of the two materials. The groove was formed using the following method.

(Function) Therefore, in the sliding bearing of the present invention, surface grooves on the inner periphery and the outer periphery can be easily formed by chemical treatment without machining. Therefore, long bearing grooves can be easily manufactured, and grooves with complicated shapes can also be easily manufactured.

Further, according to the method of manufacturing a sliding bearing of the present invention, grooves can be formed very easily.

(Example) The present invention will be explained below based on the illustrated example. 1st
The figure shows a conceptual configuration of a sliding bearing according to an embodiment of the present invention. That is, the bearing main body 1 has a cylindrical shape, and a spiral groove 3 for lubrication is provided on the inner peripheral sliding surface 2 of the bearing main body 1 . This groove 3 is formed of a different material from the bearing body l, and by chemically dissolving only this different material 4, a groove 7113 recessed relative to the sliding surface 2 is formed. It has become.

Various combinations of materials are possible, but in this example, taking advantage of the fact that glass fiber dissolves in 46% hydrofluoric acid, the bearing body l is made of carbon that is insoluble in hydrofluoric acid or carbon coated with cool pitch. Using the impregnated material, three groove portions were molded with glass fiber.

In addition, the bearing body l is made of fluorine-based resin that cannot be immersed in acid.
Phenol resins and the like can also be used. Moreover, materials having different solubility in alkaline solutions can also be used without using an acid. In short, it is sufficient to select a material combination that does not dissolve the bearing body 1, but only dissolves the groove 3 portion.

2 to 4 show a specific method for manufacturing the bearing of the present invention.

First, as shown in FIG. 2, a laminate 7 is formed by stacking several layers of carbon-based material 5 made of carbon or carbon fiber impregnated with tar pitch and covered with glass fibers w16. This laminate 7 is rolled into a cylindrical shape using a curling machine or the like to form a bearing material 8.

Depending on how the glass fibers 6 are laid, a layer of glass fibers 116 is exposed on the outer or inner periphery of the bearing material 8.

For example, as shown in FIG. 3, the laminate 8 is wrapped so that the end surface 7a is exposed on the inner and outer peripheries of the ring bearing material 8.

The bearing material 8 formed in this manner is immersed in a 46% hydrofluoric acid aqueous solution to dissolve the glass fibers 6 as shown in FIG. 4, thereby forming spiral grooves 3 on the inner peripheral surface of the bearing material 8. can be formed.

The depth of this groove 3 can be precisely controlled by increasing or decreasing the treatment time with hydrofluoric acid.

Further, the width of the groove 3 can be varied depending on the thickness of the layer of glass fiber 6, and the shape of the groove 3 can be varied depending on how the carbon-based material 5 and the glass fiber 6 are laminated and how they are wound. For example, FIG. 5 shows a case where an annular groove is formed, and in this case, the laminate 7 may be simply wound into a cylindrical shape instead of being wound spirally.

In this way, since the grooves are formed by chemical treatment using hydrofluoric acid, the grooves can be easily formed even in a long bearing.

In this embodiment, a case has been described in which grooves are provided on the inner circumferential surface of the bearing, but grooves may also be provided on the outer circumferential surface.

However, if the materials are rolled one on top of the other as in the illustrated example, grooves can be formed on both the inner and outer peripheries.

(Effects of the Invention) The present invention has the above-described structure and operation, and the grooves provided on the surface of the bearing body are molded using a different material from that of the bearing body, and the grooves are formed by melting only this different material. Since it is designed to be molded, there is no need for machining as in conventional methods, and long bearings can be easily molded. Further, since the grooves can be formed by chemical treatment, a certain groove can be formed regardless of the processing machine or the skill of the engineer. Furthermore, various effects such as being able to easily form grooves that are difficult to form by machining can be obtained.

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional view of the sliding bearing of the present invention, FIGS. 2 and 3 show the steps of the manufacturing method of the sliding bearing of the present invention, and FIG. 2 is a schematic perspective view of a state in which different materials are laminated. Figure 3 is a schematic perspective view of the rolled material shown in Figure 2, Figure 4 is a partial sectional view of the groove in the chemical treatment process, and Figure 5 is a view of the bearing material used to form an annular groove. Partially broken perspective view, No. 6
The figure is a longitudinal sectional view of a conventional sliding bearing. Explanation of symbols 1...Bearing body 2...Inner peripheral sliding surface 3.
...Groove 4...Different material 5...Carbon material 6...Glass fiber 7...Laminated body 7a...End face 8...Bearing material No. 1! Figure 5 Figure 2 Figure 6 Figure 3 Figure 4

Claims (2)

[Claims] (1) A sliding bearing having a groove on the surface of the bearing body, characterized in that the groove portion of the bearing body is molded from a different material from the bearing body, and the groove is formed by melting only the different material. sliding bearing. (2) A sliding method in which a cylindrical bearing material is formed from two types of materials, the two types of materials are exposed on the surface of the bearing material, and a groove is formed by melting only one of the two materials. Bearing manufacturing method.