US1804015A - Method of making bearings - Google Patents

Description

May 5,1931.

W. H. KLOCKE METHOD OF MAKING BEARINGS Filed Dec. 28, 1928 A TTORNEYG.

Patented M1115, 1931 UNITED, STATES PATENT- OFFICE WILLIAM H. KLOCKE, or woonnAvEN, NEw YORK, ASSIGNOIR. r CLEVELAND GRAPHITE BRONZE COMPANY, OF CLEVELAND, onro, A QORPORATION or OHIO r 1' METHOD OF MAKING BEARINGS Application filed December 28; 1928. Serial No. 328,965.

The present invention, relating, as indicated, to a bearing and method of making the same is particularly directed to a means for preventing leakage during the lining of a cylindrical shell with molten bearing metal 'where the shell is formed either from a single strip of fiat stock or from two or more strips of flat stock bent into segments of a cylinder.

To the accomplishment of the foregoing and related ends, said invention, then, consists of the means and steps hereinafter fully described and particularly pointed out in the claims;' the annexed drawings and the following description setting forth in detail certain means and one mode of carrying out the invention, such disclosed means and mode illustrating, however, but one of various ways in which the principle of the invention may be used.

In said annexed drawings Fig. 1 is a side elevation partially in section of an apparatus'adapted for the lining of shells of the character described; Fig. 2 is a transverse sectional View showing two half shells mounted together to form a single shell, against which bearing metal is to be cast internally; and Figs. 3 and 4 are similar partial views showing modifications of the joint shown in Fig. 2.

In the manufacture of lined bearings the shell proper of the bearing may be formed either of tubular stock, of a single strip of flat stock formed into a cylinder, or of two or more strips of fiat stock formed into segments of a cylinder and then assembled to provide a complete cylinder. In the use of tubular stock there is of course no possibility of leakage when bearing metal is subsequent ly cast even under heavy pressure againstthe interior of the shell. In the case of shells formed from a single piece of flat stock it is necessary to provide a fluid-tight joint in order to prevent leakage during the casting operation, and while by suitable forming methods it is possible to secure such a joint it is sometimes more convenient to provide against leakage by certain subsequent precautions. In the case of assembling shells consist ing of two or more segments of a cylinder it is of course always necessary to prov de some additlonal means for securing either pressure across-the oints or barrlers at these oints to prevent leakage. The present invention relates to this last-named means for providing tightjoints in such types of shells during the lining operation.

In Fig. 1 there is shown a shell 1 provided with one or more 'joints 2, the shell being mounted between conical chucks 3 and 4; which it is understood are capable of movement toward each other to clamp the shell concentrically and tightly therebetween. One of the two chucks is hollow and is provided with a pouring spout 5 extending into the interior of the shell 1-, through which molten bearing metal, such as babbitt, may

be introduced into the shell. During the in troduction and cooling of the bearing metal the chucksand shell are rapidly rotated and the bearing metalis thus carried around the interior of the shell and is applied evenly and concentrically thereto, s

In Fig. 2 I have shown two half-shells 10 and 11 assembled to form a complete shell, the joints between the ends of the two shells being closed by means of barriers in the form of soft wires 12 extending from end to end of the two shells. The two half shells when thus assembled are placed in the chucks 3 and 4 the latter are tightened to hold the shells together, and this tightening action presses the ends of the shells against the wires and produces asnug tight engagement between the wires and the end walls of the shells. When molten bearing metal is subsequently poured into this shell and is caused to flow into the openings between the ends it contacts of course with the wires 12 and as the latter are pressed into any irregularities with the ends of the two shells it is impossible for the molten metal to leak past the wires and to be thrown from the rotating shells.

An even more effective joint is shown in Fig. 3, in which the ends of the shells or shell are-provided with notches 13 in which a wire 14 is laid, the wire extending partly into each of the ends of the shell and making it necessary for any molten metal to pass completel around the wire, a as well as through t e engaging ends of the shell before it can escape.

Another type of joint is shown in Fig. 4, inwhich recesses 15 and 16 are formed inthe outer end of each shell, the recesses stopping short of the inner circumference and providing a'space upon assembly of the shellsinto which the wire '17 may be snugly fitted. In this type of joint molten metal must first pass between the contacting edges of the shells and then around the wire before it can escape. All of the types of joint illustrated have been found effective under theordinary commercial casting conditions and one or the other may be employed, depending upon, first, the cost, and second, the casting pressure whichit is necessary to resist.

s It will also be understood that the type of joint selected will depend to some extent upon whether the cylindrical shell consists of a a single strip of metal with asingle joint, or is formed of two half shells. 'In either case the ends of the shell .or of the half shells may be formed as indicated in Figs. 3 and 4 either before the strips are formed, but if either-of these joints be employed in a shell formed of two half shells the end faces may be prepared after the formation of the strips into their semi-cylindrical form.

Other forms may be employed embodying the features-of my. invention instead of the one h e explained, change being made inthe for or construction, provided the elements stated by any of the following claims or the equivalent of such stated elements be employed, whether produced by my preferred method or by others embodying steps equiva lent to those stated in the following claims. I therefore particularly point out and distinctly claim as my invention 1. In a method of making lined bearings, the steps which consist in forming two semi- -cylindrical shells, assembling the same into a, cylinder with intermediate elements engaged between the adjacent ends of said half 55- cylindricalshe ,assembling the same into 7 shells and snugly clamped therebetw'em'rotating the assembled cylinder while maintaining a pressureacrosslthe adjacent ends of the half cylinders and introducing molten bearing metal into the interior of. said shell.

2. In amethod of making lined bearings, the steps which consist in forming two semia cylindrical-she with interposed wiresextending longitudinally between-the adjacent ends of thehalf shells, clamping said two half shellsfltogether, and casting bearing metal under pressure face of said shells. w Signed by-me, this 22nd day of Dec., 1928.

against the inner sur-

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