JPS6330525B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a half-split bearing, and more specifically, a method for manufacturing a half-split bearing for use in internal combustion engines, compressors, and other rotating parts, in which the inner bearing layer is The present invention relates to a method for manufacturing a half-split bearing that is uniformly formed and that can be opened to a certain extent without causing any trouble in assembling it to a rotating shaft, etc., without cutting the bearing layer of the bearing alloy at both ends.

A so-called half-split bearing 3 as shown in Fig. 1a is used as a bearing metal used in internal combustion engines, compressors, and other rotating parts, and this bearing 3 is made of expensive bearings such as white metal or copper-lead alloy. It is made by bending the bearing material of the bearing layer 2 made of an alloy and the back metal 1 (see FIG. 1b) into a semi-cylindrical shape. The bearing layer 2 of these bearing alloys is manufactured by continuously casting on the steel strip of the backing metal 1, or by scattering bearing alloy powder onto the backing metal 1 of the steel band and then sintering it in a reducing atmosphere furnace. Manufactured.

No matter which method is used to manufacture it, the backing metal 1
The bearing material comprising the bearing layer 2 and the bearing layer 2 is manufactured as a bimetallic material as shown in FIG. 1b, which is further machined into a half bearing 3 as shown in FIG. 1a. In other words, the conventionally used steel strip 1 used as the back metal 1 is a flat steel strip plate as shown in FIG. Bearing layers 2 made of lead alloy or the like are laminated to form a bimetallic material as shown in FIG. 1b, which is then machined to form a half bearing as shown in FIG. 1a. However, with this half-split bearing, it is necessary to cut the bearing layer at the circumferential end to make it slightly thinner to make it easier to assemble, and the white metal, copper-lead alloy, etc. to be cut are expensive. This is extremely uneconomical. Also, due to this cutting, the bearing layer at the circumferential end becomes thinner than other parts, and the back metal surface may be exposed.Furthermore, after processing the bearing material into a semi-cylindrical shape, the entire inner surface of the bearing layer is cut. When processing to smooth the bearing layer, the backing metal surface is extremely likely to be exposed at the thin end of the bearing layer, which is undesirable.

The purpose of the present invention is to solve the above-mentioned drawbacks, and specifically, a bearing layer of white metal, copper-lead alloy, etc. is coated to a uniform thickness on a backing metal whose central part is raised to a medium height compared to both ends. A method of manufacturing a half-split bearing by laminating and integrating the bearing material, then bending both ends of the bearing material to one side to form a semi-cylindrical shape with the bearing layer facing inside. propose.

In addition, when integrating and laminating in this way, either the casting method or the sintering method as in the conventional example may be used.

Therefore, the method of the present invention will be explained.

First, in the present invention, as shown in FIG. 2, the backing metal 6 is made of a steel material so that the central part is higher than both ends, and the bearing layer 2 is coated on the surface with a uniform thickness. Laminate (see Figure 4b). As the bearing metal forming the bearing layer 2, any metal or alloy that is currently used as a plain bearing, that is, any metal or alloy that can provide bearing performance such as mechanical strength and lubricity, can be used. As part of this, inorganic materials and organic materials can be added and blended. Further, the bearing material 5 consisting of the bearing layer 2 and the backing metal 6 with a medium height can be formed by either casting or sintering as described above, but when sintering is used, the backing metal 6 is configured with a medium height. In some cases, it is rolled as follows.

That is, an alloy or metal powder forming a bearing layer is sprinkled on the surface of the medium-high back metal 6, and rolled with upper and lower rolling rolls 4a and 4b having different shapes as shown in FIG. In this case, since the upper and lower rolls have different shapes, the powder density of the bearing layer is uniform between the center and both ends, and the bearing layer 2 has a uniform thickness. To explain in more detail, when rolling is performed using a rolling mill with upper and lower flat rolls as in the conventional example, the bearing layer 2 is As shown in FIG. 4a, the density of the powder differs between the center and both ends, being thinner at the center and thicker at both ends. That is, the density at the center is high, and the density at both ends is low, resulting in a difference in the physical strength of the bearing layer. On the other hand, when rolling with the rolling rolls shown in FIG. 3, even if the thickness of the back metal 6 is different between the center and both ends, the bearing layer 2 is formed with uniform density and constant thickness at the center and both ends. Obtained as shown in FIG. 4b.

Next, this bearing material 5 is formed into a semi-cylindrical shape by bending both ends 5a and 5b to one side so that the bearing layer 2 is on the inner surface, as shown by dotted lines in FIG. 4b. When molded in this way, the back metal 6 has a medium height and the bearing layer 2 on the surface has a constant thickness, so this can be done without cutting at both ends 5a and 5b in the circumferential direction as in the conventional example. The parts open, making it extremely easy to assemble to a journal or shaft. Further, the thickness of the inner bearing layer 2 is uniform over the entire surface, so that bearing performance is not affected.

Further, the bearing layer 2 is configured as a single layer as described above, but can also be configured as two or more layers as desired.Furthermore, an adhesive layer (see FIG. It is also possible to firmly adhere the bearing layer 7 onto the backing metal 6 by interposing a metal material (not shown). As this adhesion layer, any metal layer or alloy layer used in conventional examples can be used, and the adhesion layer can be formed by plating or other conventional methods.

[Brief explanation of the drawing]

FIGS. 1a and 1b are perspective views of a conventional bearing metal and a cross-sectional view of the bearing material used therein, FIG.
FIG. 3 is a layout diagram showing a combination of rolls of a rolling mill used in carrying out the present invention, FIG. FIG. b is an explanatory diagram of manufacturing a half bearing according to the present invention. Symbols 1... Back metal, 2... Bearing layer, 3... Half bearing, 4a, 4b... Roll rolls, 5... Bearing material, 6... Medium high back metal.

Claims (1)

[Claims] 1. Molding a backing metal with a central part thicker than both ends, and integrally laminating a bearing layer of a certain thickness of a bearing alloy on the central and high backing metal to create a bearing material, and applying this bearing material to the two ends. 1. A method for manufacturing a half-split bearing, comprising forming the half-split bearing into a semi-cylindrical shape by bending it to one side so that the bearing layer is on the inner surface.