US1193886A - Grinding - Google Patents

Description

M. J. FLAVIN.

GRINDING, POLISHING, AND BUFFING MACHINE.

APPLICATXONVFILED SEPT. 18, 1915.

1,1 93,886. Patented Aug. 8, 1916.

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M. J. FLAVIN.

GRINDING, POLlSHING, AND BUFFING MACHINE; APPLICATION FIL'ED SEPT. 18. 1915.

1,193,886. PatentedA 8,1916.

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M. J. FLAVIN.-

GRINDING, POLISHING, AND BUFFING MACHINE.

APPLICATION FILED SEPT-18,1915- Iaten ted Aug. 8, 1916.

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WITNESSES.-

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TUNTTED STATES PATENT @FTTEE.

MICHAEL J. FLAVIN, OF GREENFIELD, MASSACHUSETTS, ASSIGNOR TO WILLIAM BARRY, OF ORANGE, MASSACHUSETTS.

GRINDING, POLISHING, AND BUFFING MACHINE.

Application filed September 18, 1915.

To all whom it may concern:

Be it known that I, Mist-man J. FLAVIN, a citizen of the United States of America, and resident of Greenfield, in the county of Franklin and State of Massachusetts, have invented certain new and useful Improvements in Grinding, Polishing, and Bufling Machines, of which the following is a full, clear, and exact description.

This invention relates to a machine primarily designed for the polishing of cross sectionally circular articles and more especially those having bulging or convex, concave, or ogee contours.

The object of the invention is to provide amachine in which the article to be polished is mounted on the upper end of a spindle having means for the rapid rotation thereof and in which a head carrying a polishlng wheel or wheels is capable of movements both in a downward direction to bring the polishing element into the region of the mounted piece to be polished and transversely movable for presenting the polishlng element against all portions of the curved side of the piece.

The invention is described in conjunction with the accompanying drawings and is set forth in the claims.

In the drawings:Figure 1 is a plan view; Fig. 2 is a side elevation of the improved polishing machine. Figs. 3 and 4 are respectively a partial rear elevation and partial side elevation of the machine showing a modification in the manner of mounting the frame by which the polishing wheel spindle is carried. Figs. 5 and 6 are elevations at right angles to each other showing arrangements whereby the usual upright work carrying spindle may be revolubly ad- .justed whereby the work may be held in the most advantageous position for receiving the action of the polishing wheel thereon. F igs. T and 8 are sectional views as taken on line ,77, Fig. 2, showing the clutch device for connecting the work carrying spindle with the pulley for the driving thereof,one thereof showing the parts in clutch and the other showing the parts out of clutch. Fig. 9 is a horizontal cross sectional view as taken on line 99, Fig. 6, for showing a detail of construction hereinafter referred to.

In the drawings, A represents the frame of the machine at the rear end of which is mounted a horizontal transverse driving Specification of Letters Patent.

Patented Aug. 8, 1916.

Serial No. 51,373.

shaft B having a driving pulley C whereby through belt D the shaft is driven.

At the forward end of the frame is a substantially upright work carrying spindle E which is rotatable in and through the frame A and is capable of an endwise sliding movement within a slight range vertically through bracket-like members of the frame.

The upper and lower ends of the spindle are respectively above and below the frame members as shown in Figs. 2 and 7 and 8. The work is carried directly or through any equipment therefor at the upper projecting end of the spindle. The spindle has loosely thereabout the pulley F which rests on the lower bracket member a of the frame. The spindle between the lower bracket member a and the upper bracket member a of the frame has affixed thereon a downwardly convergent clutch member 5, and the loose pulley F is formed with an upwardly open, downwardly convergent, clutch socket (Z, these adjacent parts so coacting that when the spindle is permitted to descend gravitatively under its own weight and the addi tional weight of the conical clutch member Z), it will become engaged with the pulley and be rapidly rotated by the latter through the driving connection therewith of the crossed belt 7 driven from the pulley g on the driving shaft B of the machine.

G represents a treadle motion consisting of the pedal member h, the intermediately pivoted lever h and the connecting link 71, The forward end of the intermediately pivoted lever comprised in the treadle motion lies closely under the lower end of the spindle, and normally disengaged from, or ineffective relatively to, the spindle whereby the latter may normally gravitatively and automatically be in clutch with its driving pulley F. The treadle is operated to disconnect the spindle from the driving means therefor when the work is to be mounted on or removed from the spindle.

Referring to Figs. 1 and 2, H represents a frame mounted for a vertical swinging movement on and relatively to the driving shaft, such frame extending forwardly from the shaft to the front end of machine, and such frame is also capable of a movement horizontally and transversely relatively to its spindle in addition to its capability of transverse horizontal movement. The frame as shown comprises, or is employed in conjunction with, a yoke J which is mounted tiltably or for a partial revoluble movement on the main shaft B. The rear portions of the members of the frame H are connected by trunnion joints 7;, centrally to the upper and lower portions of the yoke J whereby the frame has the aforementioned capability of transversely and horizontally swinging on the substantially vertical pivot axes i. The frame'H is formed at its forward end with a head K in which is mounted a substantially transverse shaft L, intermediately carrying a pulley L and having at its extremity, which is adjacent and above the work carrying spindle E, one or more polishing wheels 70 Wheels of different sizes and character are to be interchangeably employed on the polishing wheel shaft L. In Figs. 1 and 2, two wheels are shown, the one 72 being of a larger diameter than the one 7c ,one of these wheels being of a coarse abrading character while. the other is to be finer and for the finishing of the work.

m represents a portion of a cord or chain understood as running over an elevated sheave and having counterpoise weight (not shown) and as common in swinging tool carrying heads or frames.

The polishing wheel shaft pulley L is driven from the main shaft pulley M by the belt N.

0 represents a handle rigidly connected to the polishing wheel shaft carrying head,

and to be made use of manually for bringing the polishing wheel down to proximity to the piece to be polished and by transverse movement against the side of the piece.

By employing a cross belt for driving the spindle E, the work and polishing wheel have relatively opposite rotations, which manifestly result in an acceleration of the polishing action.

In the utilization of the machine, the operative first presses the pedal member of the treadle motion, causing a cessation of the rotation of the work carrying spindle, and then mounts the work on the upper end of such spindle, whereupon he releases the treadle permitting the spindle to become clutched and rapidly rotated; he then, through the handle 0 downwardly swings the frame to bring the polishing wheel onto the surface of the usually non-cylindrical piece to be polished and moves the. frame transversely as required to maintain the polishing wheel in its working contact on the bulging or hollowing surface of the piece, maintaining the wheel in its working position until the part has been finished.

In Figs. 5 and 6 the portion of the frame A in and through which the work carrying spindle E is substantially vertically mounted, is formed as a head P mounted on a bracket-like portion A of the frame proper for a tilting or partially revoluble adjust ment on a horizontal pivot axis which is longitudinally of the machine and whereby the spindle and its work may be tilted to proper inclination in a plane crosswise of the machine, so that round pieces of work of certain peculiar shapes may be so held while being rotated as to better permit the operative access thereagainst of the polishing wheel or wheels.

In Fig. 6 the revoluble adjustable head P is indicated as having a stud P which passes through and beyond a hole therefor in the bracket portion A of the frame and receives the nut 25 for the confinement of the head in its proper adjustment.

. WVhen the machines are equipped with the revolubly adjustable head P so that at times the work carrying spindle E is swung considerably from the vertical line, an intervening thrust rod u is provided for an up and down, but non-rotative movement through a suitable part of the frame, such thrust rod having an arc-shaped extension a which has a curvature corresponding to the path of movement of the end of the revolubly adjustable spindle; and therefore, irrespective of the degree of inclination of the spindle (within reasonable limits) the treadle motion will always be effective for its proper coaction with the spindle.

In Figs. 3 and a the frame H which carries the polishing wheel head at its forward end instead of being pivotally jointed to the yoke J, whereby it may swing horizontally relatively to the tiltable yoke, is indicated as rigidly connected to the yoke, but the yoke is slidable along the trans-. verse main-shaft B so that through the sliding as well as the tilting motions of the yoke, substantially the same movements may be imparted to the polishing wheel head as have been already described.

The wheels to be employed in this machine while most times are polishing wheels may at election of the user, be grinding wheels or buffing wheels.

I claim:

1. In a polishing machine, in combination, an upright spindle for carrying the work at its upper end, and means for rotating the spindle, a head, carrying a horizontal polishing wheel, above the work spindle, pivotally mounted and free for a swinging movement in a vertical plane down into proximity to and upwardly away from the spindle, and also freely movable transversely relatively to the axis of the spindle, and means for rotating the grinding wheel.

2. In a polishing machine, in combination, an upright work-carrying spindle having a clutch member thereon, a pulley through which the spindle is substantially vertically movable, formed with a clutch member, a treadle coacting with the spindle for vertically moving the latter for effecting the clutching and unclutching of the spindle and pulley, a head carrying an axially horizontal polishing w'heel above the work spindle pivotally mounted for a vertical swinging movement down toward and upwardly away from the spindle, and also movable transversely relatively to the spindle, means for rotating said pulley, and means for rotating the grinding wheel.

3. In a polishing machine, in combination, a substantially upright spindle for carrying the work at the upper end thereof, a head,in which such work carrying spindle is rotatively carried,m0unted for revoluble adjustment on a horizontal axis, and means for rotating the spindle, ahead, carrying a horizontal polishing Wheel, above the work spindle, pivotally mounted and free for a swinging movement in a vertical plane down into proximity to and upwardly away from the spindle, and also freely movable transversely relatively to the spindle, and means for rotating the grinding wheel.

4. In a polishing machine, in combination, an upright work-carrying spindle having a downwardly convergent clutch member thereon, a pulley through which the spindle is substantially vertically movable, formed with an upwardly open, downwardly con vergent clutch socket and below which pulley the spindle extends, a treadle coacting with the lower end of the spindle, and operable to vertically move the latter to lift the conical clutch member from, and to permit it to fall to engagement in the conical socket in said pulley, a head carrying a horizontal polishing wheel above the work spindle pivotally mounted for a vertical swinging movement down toward and upwardly away from the spindle, and also movable transversely relatively to the spindle, means for rotating said pulley, and means for rotating the grinding wheel.

5. In a polishing machine, in combination, a supporting frame, a horizontal driving shaft mounted in the rear portion of said frame, an upright spindle, for carrying the work at the upper end thereof, mounted in a forward portion of said frame and provided with a pulley, a pulley on said driving shaft and a belt connecting such pulley and the spindle pulley, a frame mounted for a vertical swinging movement on said driving shaft, extended forwardly therefrom, such frame being also capable of a movement horizontally and transversely of the said spindle, and provided at its forward extremity with a head above the spindle, a horizontal shaft in said head provided with a polishing wheel, pulleys on the driving shaft and the polishing wheel shaft, and a belt around said pulleys.

6. In a polishing machine, in combination, a supporting frame, a horizontal driving shaft mounted in the rear portion of said frame, an upright spindle for carrying the work at the upper end thereof mounted in a forward portion of said frame and provided with a pulley, a pulley on said driving shaft and a belt connecting such pulley and the spindle pulley, a yoke embracing and revolubly movable relatively to the driving shaft, a frame pivotally connected on a vertical axis to said yoke for a horizontal swinging movement transversely relatively to the work carrying spindle, extended forwardly from the yoke and provided at its forward extremity with a head above the work carrying spindle, a horizontal shaft in said head provided with a polishing wheel, pulleys on the driving shaft and the polishing wheel shaft and a belt around said pulleys.

7. In a polishing machine, in combination, a supporting frame, a horizontal driving shaft mounted in the rear portion of said frame, a work spindle carrying head mounted for a revoluble adjustment on a horizontal axis at the forward part of the frame, a substantially upright work carrying spindle rotatively mounted in said head and provided with a clutch member, a pulley loose on said spindle and through and below which the spindle extends, formed with a clutch member with which the clutch member of the spindle coacts, a treadle coacting with the spindle for vertically moving the latter for effecting the clutching and unclutching of the spindle and pulley, a pulley on the driving shaft and a belt connecting such pulley and the spindle pulley, a frame mounted for vertical swinging movement on such shaft extending forwardly therefrom and provided at its forward extremity with a head above the work carrying spindle and such head-provided frame being also capable of a movement horizontally and transversely of the spindle, a horizontal shaft in said head provided with a polishing wheel, pulleys on the driving shaft and the polishing wheel shaft, and a belt around said pulleys.

8. In a polishing machine, in combination, a supporting frame, a horizontal driving shaft mounted in the rear portion of said frame, a work spindle carrying head mounted for a revoluble adjustment on a horizontal axis at the forward part of the frame, a

substantially upright work carrying spindle rotatively mounted in said head and provided with a clutch member, a pulley loose on said spindle and through and below which the spindle extends, formed with a clutch member with which the clutch member of the spindle coacts, a treadle motion, a vertical thrust rod vertically, but nonrotatively, guided in the frame, with the lower end of which a member of the treadle motion coacts and the upper end of which is located adjacent the lower end of the spindle and is provided with a transversely extended are formed extension having a curvature corresponding to the path of movement of the end of the revolubly adjustable spindle, and adapted to coact with the spindle for vertically moving the latter for effecting the clutching and unclutching of the spindle and pulley, a pulley on the driving shaft and. a belt connecting such pulley and the spindle pulley, a frame mounted for vertical swinging movement on such shaft extending forwardly therefrom and provided at its forward extremity with a head above the work carrying spindle and such head-provided 9; In a polishing machine, in combination, a work carrying spindle having a clutch member thereon, another clutch member coacting with the first clutch member and means for rotating it, and means for throwing the one clutch member into and out of engagement with the other, and a head, carrying an axially horizontal polishing wheel, above the work carrying spindle, pivotally mounted and free for a swinging movement in a vertical plane down into proximity to and upwardly away from the work carrying spindle, and also freely movable horizontally relatively to the work carrying spindle.

Signed by me at Springfield, Mass, in presence of the subscribing witness.

MICHAEL 'J. FLAVIN.

Witness G. R. DRISCOLL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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