US1290578A - Apparatus for forming lined bushings. - Google Patents

Description

w. KLOCKE.

APPARATUS FOR FORMING UNED BUSHINGS.

` l ATN FILED JULY 21| IBI-7| 1,290,578. Patented Jan. 7,1919.

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WILLIAM KLOCKE, OF NEW YORK, N. Y., ASSIGNOR TO PRESSED BEARING COMPANY, I

INC., OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

APPARATUS FOR FORMING LINED BUSHINGS.

Specification of Letters Patent.

Patented Jan. 7, 1919.

Original application led June 8, 1916, Serial No. 102,518. Divided and this application led July 21. 1917. Serial No. 182,065.

citizen of the United States of America, re-

siding in Woodhaven, in the borough of Queens, county of Queens, city and State of New York, have invented certain new and useful Improvements in Apparatus for Forming Lined Bushings, 4of which the fol- A lowing 1s a specification.

This invention relates to an apparatus for forming lined bushings or the like and aims to rovide improvements therein.

he present apparatus is intended to form the lined bushings described in my application Serial No. 102,518, filed June 8, 1916, and the present application is a division of that application.

The apparatus of the present invention takes a sheet of composite material, as, forv example, a sheet composed of foundation metal such as brass, and lining or bearing metal such -as Babbitt metal, and shapes the composite sheet into tubular form.

Preferably, the shaping is effected by a curling action, and the shaped tubular body is pressed to render the lining metal 4dense and relatively homogeneous. A densiication of the lining metal is also effected by the curling action, and the relative homogeneity of the densiiied curled strip is reater than in the case where the sheet is ormed into tubular form by a plurality of separate bending operations.

Other features of improvement will be hereinafter set forth.

An embodiment of the invention is illustrated in the accompanying drawings, together with the lined bushing which is produced by the apparatus.

In said drawings,-

Figure 1 is a longitudinal section of a lined bushing which is formed by the apparatus;

Fig. 2 is an end view of said bushing;

Fig. 3 is a vertical sectional view (on the line 3-3 in Fig. 4) of said embodiment of the apparatus;

Fig. 4 is a vertical section of the parts shown in Fig. 3, the section being at right angles to that in Fig. 3, andalong the line 4-4 in Fig. 3;

Figs. 5 and 6 are detail sectional views of the dies illustrated in successive positions of the parts during the process of pressing the bushing to cylindrical shape.

In the said drawings I have not illustrated the ress construction, as presses adapted for t is purpose are Well known. Thelower or bed die Gr is provided with guide rods H upon which slides the upper or head die or movable punch I perforated at J to permit the passage of the rods. The die is provided with an arbor K which is raised abovel a semi-circular recess L in the die suiiicieutly t0 provide a channel M between the arbor and die of semi-circular form and sufficient in depth to permit the passage of the blank or sheet A. The die I has a semi-circular face N adapted in connection Awith the die face L to complete the formation 0f the bushing to cylindrical shape around the arbor K. The movable die I is provided with a blank-receiving groove or notch in the face N forming a shoulder P, and said groove has a depth or radial dimension substantially equal to the thickness of the blank A, and is preferably wider than its depth. The blank A is placed with its lower end in the channel N and with its upper end in the notch O restin against the shoulder P. For the purpose of holding the blank in place I place the same slightly out of plumb. This same result might be accomplished by other means. The blank being held in the position shown in Fig. 3, the upper die is caused to descend and the blank will be forced through the channel M and curled around the arbor K substantially to the point indicated'in Fig. 5, which is about as far as 1t can be forced in such direction. Continued descent of the punch will cause the end of -the blank to ride out of the notch O (due to the increasing resistance of the blank as it curls around against the die face N) and the blank will then be forced to cylindrical shape by the die I pressing the blank against the lower die and the intervening arbor K. The curling of the blank or sheet around the arbor acts to densify the lining metal of the composite blank, they densificatlon being proressively greater toward the surfaceiof the mer at the interior of the bushing. This curling action also renders the. densification relatively uniform or homogeneous.

The action of the dies and arbor upon the bushing will have the effect of forclng the blank to cylindrical shape and of thorou hly compacting and further densifying the hner,

roducing a smooth and even sur ace on the interior thereof which can usually be employed without further treatment. The

abutting edges of the blank also retain their closely abutting position and do not separate or spring apart. f

Provision is made to ermit of, a slight movement between the ar or K and the die G in order to thoroughly densify the liner. This may be accomp ished in many ways. As shown, it is provided by a yielding support ofthe arbor. The ar or has a head which is removably mounted in a standard V suitably attached to the die so as to be removable. The head 7c is mounted in a bearing in this standard V and is provided with a slides in a channel T in the standard. A spring S is mounted in the said channel and is he d which it is compressed and caused to press upon the head R so as to enable the arbor K to yield under the pressure of the die I.

This yielding Amounting of the arbor en-' ables it to give as the blank is forced between it and the die G and avoids pinching the blank in the narrow intervening s ace, which might result in the buckling o the blank or the stripping from it of the lining metal. It also is important in the final squeezing of the bushin between the dies, since by the yielding o the arbor the die `pressures are equahzed and- .the bushing therein by a threaded plug U by- Lamme uniformly com acted. It also assists in the stripping olf o the finished bushing.

I have illustrated in the drawings and set forth in the foregoing description the most desirable, embodiment of my invention now known to me. It is obvious that numerous modifications may be made therein within the limits of the appended claims.

What I claim is 1. An apparatus for the purpose set forth, comprising a pair of dies movable together and having semi-cylindrical faces, and an arbor mounted concentrically within the face of one die with supportlng means for the arbor adapted normally to hold it in such concentric position and to yield to pressure exerted between the dies, whereby as the dies come together their pressure against the blaik between the dies and mandrel is equal- 1ze post W having an enlarged head R which v 2. An apparatus comprising a pair of dies and an intervening arbor, said dies having curved faces which when closed together embrace the arbor with a parallel intervening space, means for supporting the arbor in normal relation to one of said dies, and the other die having a shoulder formed by a notch in one side of its curved face adapted to bear on an edge of a Hat metal blank to push it between the first-named die and arbor, said shoulder bein outside the cylindrical faces of the dies w en united, so that it releases the end of the blank before the latter is brought to its fnal'form.

In witness whereof, I have hereunto signed my name.

WILLIAM KLOCKE.

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