JPS6057410B2 - Manufacturing method of bearing metal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of manufacturing a semicircular or cylindrical (wound bush) bearing metal.

[Prior Art] A conventional method for manufacturing a bearing metal is as follows. That is, V-shaped grooves are formed by embossing at corresponding positions on both sides (bearing alloy side and metal backing side) of a band-shaped composite plate made of a bearing alloy and a metal backing metal, and then the blank is cut once from the grooves. It is a method of making a material and then bending it into a desired shape, for example, a semicircular or cylindrical shape.

However, in this method, grooves are formed from the bearing alloy side only by embossing, regardless of the material of the various bearing alloys, especially the magnitude of elongation. [Problems to be solved by the invention] For example, materials with relatively high elongation, such as white metals and aluminum alloys, can be processed using only the conventional embossing method, but materials with low elongation, such as copper-lead alloys (Kelmet), Bearing alloys undergo local plastic deformation within the alloy, resulting in problems such as changes in the alloy structure, reduced strength at the adhesive boundary between the alloy and backing metal, peeling of the adhesive boundary, and cracks occurring within the alloy. Ta.

[Purpose of the invention]

The present invention aims to solve the above problems.

[Means for solving problems]

The gist of the present invention is as described in the claims, namely, V-shaped grooves are formed at corresponding positions on both sides of a band-shaped composite plate made of a bearing alloy and a metal backing, and then , in a method of manufacturing a bearing metal by cutting and forming the groove portion; (a) forming the groove on the metal back metal side by an embossing method; (b) forming the groove on the bearing alloy side by a cutting method or Forming by using a combination of an embossing method and a cutting method, (c) Creating a blank by temporarily cutting from the groove portion, (d)
This is a method for manufacturing a bearing metal characterized by bending and forming the blank.

[Example] The present invention will be explained in detail in the order of manufacturing steps. Incidentally, the band-shaped composite plate 1 has a mechanism in which a portion of the composite plate 1 is sequentially advanced and passed through each process of each device (not shown) at predetermined intervals.

First step: As shown in FIGS. 1A and 2A, V-shaped grooves 4 and 5 are formed in the bearing alloy layer 2 and steel back metal layer 3 of the band-shaped composite plate 1 by embossing.

At this time, it is desirable that the depth of the groove 4 is at least the full thickness of the bearing alloy layer 2 or less. As the material of the bearing alloy, a copper-lead alloy (Kelmet) or the like, which has relatively low elongation, was used.

2nd process A notch 6 is made as shown in FIG. 1A.

Third step Marks 7 such as trademarks and part numbers are stamped on the surface of the steel back metal layer 3.

Fourth step: The oil hole 8 is made using a press machine having a punch and a die.

Fifth step As shown in FIG. 2A, a groove 4 is made in the bearing alloy layer 2 by embossing, and a cutting groove 10 is further made with a cutting tool 9 as shown in FIGS. 2A and 3. .

As is clearly shown in the figure, it can be seen that the groove 10 is deeper than the groove 4 which is cut and embossed up to the back metal. Note that the groove processing from the bearing alloy side can be performed only by cutting, but in consideration of mass productivity, consumption of cutting tools, etc., it is particularly preferable to use both embossing and cutting.

The aim of this process is to add cutting as a method for applying it to various bearing alloy materials.

Sixth Step As shown in FIGS. 1B and 2B, the band-shaped composite plate 1 is once separated from the groove portion using conventionally known and publicly used means to form a split composite plate 1''.

7th process Figure 4 shows that the split composite plate 1'' is placed in the die 1 in the press machine.
As shown in FIG. 5, when the punch 12 of the press machine descends, the divided composite plate 1'' is fitted into the die 11 and becomes semicircular. As shown in FIG. 6, the block 13 performs final shaping (so-called semicircular bearing metal 14 is shaped).

In addition, in each of the above-mentioned steps, for example, if an oil groove or the like is required depending on the bearing application, a new step can be provided. In this embodiment, the oil groove work step is omitted. Further, in the embodiment of the present invention, a method for manufacturing a semicircular bearing metal 14 has been described, but it is of course possible to manufacture a cylindrical barrel-wound bushing bearing metal without being limited to this method, for example, by changing the molding machine. . [Effects of the Invention] As explained above, the method for manufacturing a bearing metal according to the present invention does not rely solely on the conventionally known embossing method (embossing on both the bearing alloy side and the metal backing metal side), but especially on the bearing alloy side. This is a new manufacturing method that uses a cutting method or an embossing method and a cutting method to create the grooves, so it achieves the intended purpose of manufacturing high-performance bearing metal without damaging the bearing metal. be able to.

``BRIEF DESCRIPTION OF THE DRAWINGS The drawings show one embodiment of the present invention, and FIG. 1A is a front view showing the state in which the band-shaped composite plate advances in each step until the forming is completed.

FIG. 1B is a plan view of a split composite plate obtained by separating the band-shaped composite plate from the groove portion. FIG. 1C is a plan view of a semicircular bearing metal obtained by bending and forming a split composite plate. FIG. 2A is a sectional view taken along line A-A in FIG. 1A. FIG. 2B is a sectional view taken along line CC in FIG. 1B. Figure 2C is D-D of Figure 1C
A cross-sectional view along the line. FIG. 3 is a cross-sectional view of the cutting portion taken along line B-B in FIG. 1A. FIG. 4 is a front view showing the state before the split composite plate is formed by a press machine. FIG. 5 is a front view showing the state during the middle of molding. FIG. 6 is a front view showing the completed state of forming the semicircular bearing metal. [Explanation of symbols] 1...Striped composite plate, 1''...Divided composite plate, 2...Bearing alloy layer, 3
...Steel back metal layer, 4...V-shaped groove by embossing made on the bearing alloy layer, 5...V-shaped groove by embossing made in the steel back metal layer, 6...Notch, 7. ·trademark. Engraved mark such as part number, 8. Oil hole, 9. Cutting tool, 1
0...V-shaped groove by cutting, 11...Dice, 12
...Punch, 13...Block, 14...Semicircular bearing metal.

Claims (1)

[Claims] 1. A method for producing a bearing metal by forming V-shaped grooves at corresponding positions on both sides of a band-shaped composite plate made of a bearing alloy and a metal backing metal, and then cutting and forming from the grooved portions; (a) metal (b) forming the grooves on the backing metal side by an embossing method; (b) forming the grooves on the bearing alloy side by using a cutting method or a combination of an embossing method and a cutting method; (c) a portion of the groove. A method for manufacturing a bearing metal, comprising: (d) bending and forming the blank; and (d) bending and forming the blank.