US1517579A - Casting machine - Google Patents

Description

w. H. PAsHLEY CASTING MACHINE Filnd March 9. 1922 v2 Sheets-Sheet. l

Patented Dec. 2, 1924.

WILLIAM H. PASHLEY, OF NEW YORK, N. Y. v

CASTXNG MACHINE.

Application led March 9, 1922. Serial No. 542,476.

To all whom it may con-cern:

Be it known. that I, WILLIAM H. PASHLEY, a citlzeniof the United States, residing at New York city, in the county and State of New York, have invented new and useful lmprovements in Casting Machines, of which the following is a specification.

rllhis invention relates to centrifugal casting machines and more particularly to a vsimple and practical device especially adapted for babbitting-bearings by a centrifugal process.

A further object is to provide a mechanism of the above general 'character into which a bearing may be secured and the bearing surface integrally cast therein in a rapid, reliable and eflicient manner.

A further object is to provide a mechanism of the last above mentioned character which may be easily and quickly operated and in which the bearings may be removed immediately after casting and other bearings substituted whereby the process is made substantially continuous.

A further object is to provide a mechanism for rapidlyL counter-balancing weight irregularities of the bearing shell so that the shell may be rapidly' revolved without producing destructive vibrations in the driving spindle of a centrifugal casting machine with consequent destruction of spindle bea-rings and failure of machine on that account.

Other objects will be in part obvious and in part hereinafter pointed out in conneci tion with the accompanying sheets of drawtitl) ings illustrating one of various possible embodiments of the inventiom lin these drawings,

Figure 1 is a vertical sectional elevation showing such parts of the mechanism as arev necessary to understand the same.

Figure 2 is a side elevation.

Figure 3 is a detail diagrammatic view showing the counter-balancing mechanism.

Referring now to the drawings in detail and more particularly to Figure 1, 5 indicates a threaded member adapted to be selcured to a driving spindle. This member 5 constitutes the base of what may be termed a universal chuck vof well-known machine shop construction, that is, a base plate 6 has attached thereto a second plate 7 on which may be mounted preferably four radially slidable arms or jaws, 8, these arms or jaws being actuated by means of a scroll plate 10 which is provided with a circular rack 11 adapted to be engaged by a pinion 12 v which may be rotated on inserting a square wrench in a hole or recess 18. 0n rotating the lpini-on 12 the arms 8 move relatively towards eachother simultaneously to grip securely the bearing or object which is to be lined in the manner shown on Figure 1.

Each of these arms or jaws is provided with a longitudinal gripping jaw 15 adapted to slide on ways cut on these arms' and a rack 16 secured'to jaw 8 which is lengaged by a mutilated'w'orm 17 whereby the jaw 15 may be moved i-nwardly and then on turning the nut 18 the threads of the worm 17 will engage the rack 16 and the jaw will be locked in place in the usual well known manner and hold the bearing shell and the end plates 2() and 21 snugly against plate 7. End plates 20 and 21 are provided at the ends of the bearing shell for limitingl the flow of metal when casting. The plate 21 is provided with a central opening 22 through which the molten metal is admitted for casting the shell lining of babbitt or other bearing metal. rlhe jaws therefore center the shell on plate 7 and secure the end plates and shell securely `against plate 7 ready to receive the molten bearing metal.

In Figure 3 there is shown diagrammatically a double eccentric 23 and 24 4which may be secured in adjusted position on the back plate G by means of locking devices 25. These two eccentrics may be moved relatively to one another can be adjustedain the limits of capacity of the eccentrics. The maximum counter-balancing effects of the eccentrics may be combined by revolving these eccentrics lthrough 180. By adjusting them to various positlons any piece of work secured in the chuck may be perfectly balanced.

The invention herein involved resides more particularly in utilizing machine-shop apparatus for the purpose of directing casting babbitt material onto the bearings themselves without the, utilization of special forms of apparatus; molds, ladies or feeding spouts more or less common iny centrifugal casting processes. Heretofore. it has been customary to pound the babbitt material into the dove-tail grooves of the bearing by hand which has been unsatisfactory for many reasons, primarily, the length of time required, the subsequent machining of parts, the irregularity of density of maso that the machine.; perfect balance withinlit terial, the destruction of the metal structure, the failure to make the bearings absolutely oil proof, and the cracking of bearings when subjected to heavy pounding such as eX- perienced in explosion or Diesel type engines.

In the present process these objections are overcome, as the babbitting material is4 cast centrifugally directly into the dove-tail grooves ofthe bearing in a uniform and homogeneous manner and flows into the air holes or cavities that may exist in the bearing surface and subsequently require a minimum amount of machine Work, the babbitt fitting the interior surface of the shell so closely that the babbitt and shell are practically one piece.

In short the invention is of simple and practical construction, well adapted to accomplish among others all of the advantages herein set fort Without further analysis, the foregoingA plications without omitting certain features that, from the standpoint of the prior art, fairly constitute essential characteristics of the generic or specific aspects of this invention, and, therefore, such adaptations should and are intended to be comprehended within the meaning and range of equivalency of the following claims.

WVhat I claim is 2- 1. In an attachment for centrifugal casting machines for casting bearings and the like, in combination, a revolvable plate or chuck, for securing to the driving spindle of the casting machine, provided with arms with radial longitudinal, quick operating adjustable gripping jaws for securing the mold or shell to the plate and at the same time securing end plates to the mold or shell one of which is provided with an opening through which molten metal may be admitted.

2. In an attachment for centrifugal casting machines forcasting bearings-and the like, in combination, means for counterbalancing the effect of weight irregularities of the mold or shell so as to minimize the destructive effects of vibrations on the bearings of the driving spindle of the casting machine and failure thereof for continuous operation. f v

3. In an attachment for centrifugal casting machines for casting bearings and the like, in combination, means for counter-balancing the effect weight irregularities of the mold or shell so as to minimize the destructive effects of vibrations; said means comprising two relatively adjustable eccentrios.

4. In a centrifugal casting machine for casting bearings and the like, in combination, a revolvable plate or chuck provided with radial simultaneously adjustable arms having longitudinally adjustable gripping jaws to secure the bearing to the plate and end plates associated with the bearing, one ofwhich is provided with an opening through which the babbitting material may be admitted, and means for counter-bal ancing the effect of the irregularities of the weight of the bearing.

5.`In a centrifugal casting machine for casting bearings and the like, in combina tion, a revolvable plate or chuck provided with simultaneously adjustable arms having longitudinally adjustable gripping jaws to secure the mould or bearing to the plate, end plates associated with the'bearing, one of which is provided with `an opening through which the babbitting vmaterial may be admitted, and means for counter-balancing the effect of the irregularities of the weight of the bearing; said means comprising two relatively adjustable eccentrics.

Signed at Brooklyn, N. Y., this 10th day of October, 1921.

WILLIAM H. PASHLEY.

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