JPH0754848A - Bearing and its manufacture - Google Patents

Abstract

PURPOSE:To create an antinomic function of a bearing having a seizure resisting property, embedding property or the like vs loading capacity, and stabilize the quality of material. CONSTITUTION:A composite material 3 is made of a plurality of sheet materials 1, 2 having different hardness and sliced to produce plate-like composite members 4. After the plate-like composite member 4 is joined to a back metal 5, a bearing is produced by bending the composite member. The complete member 4 formed in the stripe form by a plurality of materials 1, 2 having different hardness on the surface are joined to the inner surface side of the back metal 5 to provide a bearing. Since an antinomic function of the seizure resisting property, embedding property, or the like vs loading capacity is attained, the life of the bearing can be lengthened, the dispersion of structure in the material can be prevented, the quality of the material can be stabilized and the mass production is facilitated to reduce cost.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to bearings applied to diesel engines, turbines and the like.

[0002]

2. Description of the Related Art Conventional bearings are formed by providing a material having a relatively low melting point such as white metal on the inner surface of a back metal.

Centrifugal casting is a typical method of manufacturing the conventional bearing. As shown in FIG. 2, a cylindrical backing metal 12 is set in a centrifuge 11, preheated and rotated at a high speed, and a casting material 14 having a relatively low melting point is poured into its inner surface in a molten state, and then the backing metal 12 is It was manufactured by casting the casting material on the inner surface of the back metal 12 by water-cooling the outer peripheral surface of.

[0004]

The conventional bearing and its manufacturing method have the following problems.

(1) Since the casting material is single, the bearing performance is determined by the characteristics of the material. That is, when a relatively soft material such as white metal is used, it has excellent seizure resistance, burial, and familiarity.
It has the drawback that it cannot withstand strength under high load surface pressure and is prone to cracking and peeling. On the other hand, when a relatively hard material such as an aluminum alloy is used, the strength is improved, but seizure easily occurs.

(2) There are many cases where differences in casting conditions such as cooling rate occur, and the quality is not stable due to variations in the structure, and such material problems may cause damage. The present invention is intended to solve the above problems.

[0007]

[Means for Solving the Problems]

(1) The bearing of the present invention is characterized by comprising a back metal and a composite member formed on the inner surface side of the back metal and having a plurality of materials having different hardnesses and laminated in a striped pattern. There is.

(2) In the method of manufacturing a bearing according to the present invention, a plurality of materials having different hardnesses of thin plates are superposed and bonded to each other to manufacture a composite material, and the composite material is sliced to obtain a plurality of the different hardnesses. After manufacturing a plate-shaped composite member in which the material is arranged in a strip shape and its surface is formed, the plate-shaped composite member is overlapped with the back metal and bonded, and the bonded composite member and the back metal are bent. It is characterized by having a predetermined shape.

[0009]

In the above invention (1), since the sliding surface of the bearing is formed by arranging materials having different hardness in a strip shape, the soft material portion is responsible for seizure resistance and burial. Then
The hard material part can share the load capacity, satisfy the contradictory functions required for the bearing characteristics, and prolong the life of the bearing.

In the above invention (2), since thin plate-shaped materials are laminated and joined to form a composite material, it is possible to prevent structural variations of the materials caused by the difference in manufacturing conditions in the conventional manufacturing method. It is possible to obtain a bearing with stable quality. Further, since the plate-shaped composite member joined to the back metal is formed by slicing the above composite material, it can be manufactured in a large amount at a time, and the cost can be reduced.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. As shown in FIGS. 1 (e) and 1 (f), the bearing of the present embodiment has a semi-cylindrical back metal 5 and a soft metal in the central axis direction of the bearing provided on the inner surface side of the back metal 5 or in the direction perpendicular to the central axis. The composite member 4 is formed by alternately stacking the material 1 and the hard material 2.

A method of manufacturing the above bearing will be described below. First, as shown in FIG. 1A, a thin soft material 1
1 and the thin hard material 2 are alternately laminated to have a predetermined thickness, and then the soft material 1 and the hard material 1 are bonded by a joining method such as hot isostatic press (hereinafter referred to as HIP) treatment as shown in FIG. 1B. The two are joined together to form one rectangular parallelepiped composite material 3.

Next, the composite material 3 is sliced to fabricate a plurality of plate-shaped composite members 4 each having a surface formed by alternately arranging the soft material 1 and the hard material 2. The shaped composite member 4 is overlapped with the backing metal 5 and joined again by a joining method such as HIP treatment. Finally, the joined plate-shaped composite member 4 and back metal 5 are bent into a predetermined shape, and finished by machining to complete the manufacturing.

In this embodiment, the sliding surface of the bearing is formed by the composite member 4 in which the soft material 1 and the hard material 2 are alternately arranged, and the soft material 1 takes charge of seizure resistance and burial. Since the load capacity is shared by the hard material 2, the two contradictory functions required for the bearing characteristics can be satisfied, and the life of the bearing can be extended.

Further, since the thin plate-shaped materials 1 and 2 are laminated and joined, structural variations such as segregation and coarsening of crystal grains, which are caused by subtle differences in manufacturing conditions in the conventional manufacturing method, are eliminated. It was possible to secure stable quality.

Further, by adopting a method of thinly cutting the composite material 3 having a multi-layered structure by utilizing the joining technique, it becomes possible to supply a large amount of metal material at one time, and it is possible to reduce the cost.

In this embodiment, the composite member is formed by using two kinds of materials. However, by changing the area ratio of these two kinds of materials, a bearing having performance suitable for the purpose of use can be manufactured. In addition, the material is not limited to two kinds, and a composite of many kinds of materials can be used to manufacture a bearing according to many uses.

[0018]

In the bearing and the method of manufacturing the same according to the present invention, a composite material is manufactured from a plurality of thin plate materials having different hardness, and the composite material is sliced to manufacture a plate-shaped composite material. After joining the composite member of the above to the back metal, it is manufactured by bending, and the composite member whose surface is formed in stripes with multiple materials with different hardness is to be a bearing joined to the inner surface side of the back metal. By satisfying the trade-off functions such as seizure resistance, burial resistance, and load capacity, it is possible to prolong the service life and prevent structural variations in the material, which makes it possible to stabilize the quality. Since mass production is facilitated, costs can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory view of a bearing manufacturing method according to an embodiment of the present invention.

FIG. 2 is an explanatory view of a conventional bearing manufacturing method.

[Explanation of symbols]

 1 Soft material 2 Hard material 3 Composite material 4 Plate-shaped composite member 5 Back metal

Claims (2)

[Claims] 1. A bearing comprising: a back metal; and a composite member provided on the inner surface side of the back metal, the surfaces of which are laminated and formed in a striped shape from a plurality of materials having different hardnesses. 2. A composite material is manufactured by stacking and bonding a plurality of thin plates having different hardnesses, slicing the composite material, and arranging the plurality of materials having different hardnesses in a strip shape. After manufacturing a plate-shaped composite member in which the plate-shaped composite member is formed, the plate-shaped composite member is overlapped with the backing metal and bonded, and the bonded composite member and the backing metal are formed into a predetermined shape by bending. Bearing manufacturing method.