JPH0712128A - Bearing metal - Google Patents

Abstract

PURPOSE:To provide necessary strength without using a back metal by covering bearing alloy material around plural core wires of high rigidity, and casting or sintering this so as to be formed into specified shape. CONSTITUTION:This bearing metal 1 is one piece of the cylindrical shape divided vertically into two pieces so as to be fitted into the tore of a bearing, and can be replaced when the contact race A formed of bearing alloy material 2 is worn away. Plural core wires 3 of high rigidity are longitudinally and laterally embedded in the bearing alloy material 2, along its longitudinal direction so as to ensure sufficient strength especially to the axle load applied to the circumferential direction. The strength as the bearing metal is thereby displayed, and inconvenience such as separation from a back metal is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to bearing metal for main shafts of aircraft, internal combustion engines, compressors and the like.

[0002]

2. Description of the Related Art The properties of alloy materials of bearing metals used for bearings of main shafts of aircrafts, internal combustion engines, compressors, etc., bearings of vehicles and automobiles are 1, good thermal conductivity, and 2 , The coefficient of thermal expansion is as small as possible, 3, the strength, especially the compressive strength is large, 4, the hardness, especially the high temperature hardness is sufficiently high, 5, the wear coefficient is small, the slip is good and the amount of wear is small. It is required to be small, 6, and have sufficient corrosion resistance to lubricating oil and the like. Conventional bearing metals that meet such requirements include silver alloys, aluminum alloys, copper alloys, magnesium alloys, cadmium alloys, zinc alloys, white metal alloys containing tin and lead, and hard metals containing alkali and alkaline earth metals. Although there are lead, oil-impregnated bearing alloys, etc., the most important and used in large quantities among these are copper alloys, white metals, and oil-impregnated bearing alloy materials, and magnesium alloys and zinc alloys are rarely used these days. Most of the copper alloys are bronze containing lead, and the white metal is Pb-Sb-S mainly composed of tin.
There are many n-based alloys.

[0003]

By the way, conventionally, such a bearing metal is integrally formed by casting or sintering these alloy materials on a backing plate made of a steel plate or the like in order to have strength as a structure. However, when the alloy material is heated to a high temperature, the alloy material may peel off from the back metal due to a difference in coefficient of thermal expansion from the back metal.

Therefore, the present invention has been devised in order to effectively solve the above problems, and an object thereof is to provide a novel bearing metal having a required strength without using a backing metal. is there.

[0005]

In order to achieve the above object, the present invention covers a plurality of highly rigid core wires with a bearing alloy material such as white metal or aluminum alloy, and casts or sinters the same. And formed into a predetermined shape.

It is not necessary to use a new bearing alloy material for the present invention, for example, white metal, aluminum alloy, bronze and copper alloy, silver alloy, magnesium alloy, cadmium alloy, zinc alloy, tin and lead. Conventionally known materials such as white metal-based alloys containing Al, hard lead containing alkali and alkaline earth metals, and oil-impregnated bearing alloys can be applied as they are.

The core wire may be one having high-temperature strength such as high rigidity and heat resistance. For example, in addition to a single material such as steel and copper, a different material is plated and coated on the surface. It may be made up of two or more layers, in which case a layered one can be produced by the final processing. Further, the arrangement form of the core wires is not particularly limited, and may be, for example, a shape in which the core wires are crossed in the vertical and horizontal directions, or a state in which a plurality of single core wires are arranged in the same direction.

[0008]

According to the present invention, since a plurality of highly rigid core wires are embedded in the bearing alloy material, the bearing metal has the necessary strength and the back metal is not required.

[0009]

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a bearing metal 1 according to the present invention.
1 shows an example of a radial bearing of a plain bearing.
As shown in the figure, the bearing metal 1 is a sliding bearing, and is one of a cylindrical shape divided into upper and lower two pieces to be fitted in the holes of the bearing, and when the contact surface A made of the bearing alloy material 2 is worn. It can be replaced with. Further, a plurality of highly rigid core wires 3 are vertically and horizontally embedded in the bearing alloy material 2 along the length direction thereof, and in particular, a sufficient strength is secured against an axial load applied in the circumferential direction. It is like this.

Next, an example of manufacturing this bearing metal will be described.

[0012]. Continuous casting method As shown in FIG. 2, a plurality of core wires 3 are arranged in a sheet form and delivered from a bobbin 4 around which the core wires 3 are wound, and the heat-melted bearing alloy material 2a is poured onto the core wires 3. so,
The core wire 3 is buried, and then these are cooled and solidified to form a sheet-shaped bearing metal material 5, and then the bearing metal material 5 is pressed into a predetermined shape by a press machine or the like to form the bearing metal 1. To do. As shown in FIG. 1, the bearing metal 1 formed in this way has a surface layer portion formed of the bearing alloy material 2 exhibiting bearing performance, and the core wire 3 embedded therein exhibits necessary strength. Will be done. Further, according to such a manufacturing method, since the bearing metal material is continuously manufactured, the manufacturing efficiency can be greatly improved.

.. Powder Sintering Method As shown in FIG. 3, the bearing alloy powder 2b formed by fine pulverization or atomizing method is placed on the core wire 3 arranged in a sheet shape and fed from the bobbin 4, and is sintered. After forming the sheet-shaped bearing metal material 5, the bearing metal 1 is formed by processing in the same manner as the continuous casting method shown in FIG. The bearing metal 1 thus formed can exhibit the same effects as those of the continuous casting method shown in FIG.

.. Plasma Sintering Method (Near Net Shape) As shown in FIG. 4, after the core wire 3 and the bearing alloy powder 2b are arranged in the mold 6 of the plasma sintering apparatus, a high voltage is applied to the core wire 3 and the bearing alloy powder 2b to form plasma. Are generated, and the heat sinters them together. In addition to the above-mentioned method, this manufacturing method can deal with complicated shapes and can sinter in a short time.

Then, as a result of a bearing test of the bearing metal formed by the plasma sintering method among the above-mentioned manufacturing methods, the bearing metal having the same or higher lubricity and wearability as those of the conventional bearing metal provided with a back metal is obtained. In addition to exhibiting bearing performance, it also exhibited sufficient strength as a bearing metal.

[0016]

In summary, according to the present invention, the strength required as a bearing metal can be exerted, and therefore, the inconvenience such as peeling from the back metal can be prevented in advance.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the present invention.

FIG. 2 is a schematic view showing a first manufacturing method of the present invention.

FIG. 3 is a schematic view showing a second manufacturing method of the present invention.

FIG. 4 is a schematic view showing a third manufacturing method of the present invention.

[Explanation of symbols]

 1 Bearing metal 2 Bearing alloy material 3 Core wire

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masato Motoyoshi Inventor, Isawa Central Research Institute, Fujisawa City, Kanagawa 8 (72) Inventor, Hidetaka Shibata, Isawa Central Research Institute, Fujisawa, Kanagawa Prefecture (72) In-house (72) Harue Sugizaki, 8 Soil Shelf, Fujisawa, Kanagawa Prefecture, Isuzu Central Research Institute (72) Inventor, Yuji Matsunami, 8 Shelf Shelf, Fujisawa, Kanagawa, Ltd. (72) Inventor Kenji Hita 8 Tsutana, Fujisawa, Kanagawa Pref.Isuzu Central Research Institute (72) Inventor Eiji Shiotani 8th Fujisawa, Kanagawa Pref. Isuzu Central Research Institute (72) Inventor Akira Tsujimura Fujisawa Kanagawa City Shelter 8 In Isuzu Central Research Institute

Claims (1)

[Claims] 1. A bearing alloy material such as white metal or aluminum alloy is coated around a plurality of highly rigid core wires, and
A bearing metal, which is formed by casting or sintering it into a predetermined shape.