US859343A - Grinding-machine. - Google Patents

Description

No. 859,343. PATENTED JULY 9, 1907. C. I. SHIRLEY.

GRINDING MACHINE.

APPLIOATION FILED rm. 10, 1906.

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(a) I w 9* "Q L I W 7 N Q I N I III No. 859.343. PATENTED JULY 9, 1907.

G. I. SHIRLEY.

' GRINDIN G MACHINE.

APPLIOATION FILED FEB. 10, 1906.

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APPLIOATION FILED FEB.10, 1906.

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PATENTED JULY 9, 1907.

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UNITED STATES PATENT OFFICE.

CEPHAS LSHlRLEY, OF NEWARK, N JERSEY, ASSIGN OR TO ATT ROLLER BEARING COM- PANY, OF HARRISON, NEW

JERSEY, A OQRPORATIQN OF NEW JERSEYL GRINDING-MACHINE.

Specification of Letters Patent. 7 Application filed February 10,1906. Saris-13m 300,419;

Ilatented July 9, 1907.

To all whom it may concern:

Be it known that I, GEPHAs I. SHIRLEY, a citizen of-the United States, residing at 114 Stone street, Newark, county of Essex, and State of N ew'Jersey, have invented certain new and useful Improvements in Grinding-Machines, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

The grinding machine described herein is devised especially for grinding loosecylinders, but as its or ganization furnishes opposed grinding disks,'means for separating the same, and means for inserting articles to be ground between the disks when separated, it

is obvious that the machine may be used for otherpurposes.

The machine was designed especially for grinding,

to uniform cylindrical shape, spirally wound cylindrical springs, which are used as antifriction rollers in a certain class of roller bearings.

With the machine shown herein, the hollow rollers areapplied successively to radial mandrels upon an intermittently rotating carrier,'by which they are placed between the opposed faces of two grinding disks.

To make the disks operate uniformly upon the .rollers, it is found necessary to separate the disks during the placing of the rollers or cylinders between the same, and it is also ,desirable that the carrier for the rollers should be moved longitudinally to prevent the rollers from touching either of the disks during such placing operation.

When the roller or cylinder is in place, the movable disk is pressed by a spring toward the opposite disk, and a stop regulates the advance of such movable disk so that the operation of the grinders ceases when the rollers are reduced to a uniform size. The stop is adjustable, as well as the tension of the spring, tov

vary the operation of the grinding disks.

The invention includes the special mechanismfor retracting one disk from the other and for moving the carrier longitudinally while placing the rollers be tween the disks, and the details of the invention will be understood by reference to the annexed drawing,

longitudinal section of in which I Figure 1 is a side elevation of a machine embodying the invention; Fig. l is a vertical sectionof the thrust-bar s for the bell-crank, and its-guide upon the bed; Fig. 1" an alternative form of carrier; Fig. 2 isa plan of the machine; Fig. 3 is an end view showing the feedegearing; Fig. 4 is a cross section where hatched, on line 44 in tion where hatched, on line 5-5 in Fig. 2; Fig. 6 is a the movable disk and its at tachlnents; Fig. 7 is a longitudinal section of the carrier and its spindle.

I Fig. 6.

cylinder.

A caniezi'suited for hollow cylinders is formed with 105 Fig. 2; Fig. 5 is a cross sec-- a designates a bed having at one end a'fixed head provided with bearings b mounted thereon for the arbor c of one of the grinding disks d. v

,A plate is swiveled upon the bed by a pivot-block f and sustains a head 9 having the bearings g 'for the movable arbor h, which carries the opposed movable disk 15. The disk is attached to a hub 14 upon the arbor h, which is projected beyond the nearest bearing g sufiiciently to introduce an anti-friction collar 15, a spring 16 and an adjusting-nut 17, as shown in The anti-friction collar has a hub 18 which is extended a sleeve 19 in contact with the bearing and has a thread next the'bearing to which the nut 17 is fitted. The spring 16 is fitted over the sleeve into contact with the collar 15, and the thrust of the spring against the nut holds thesleeve against the bearing so that the spring presses the disks normally togethen The anti-friction collar has a socket containing steel disks 20 between which balls 21 are fitted, so that the grinding pressure upon the disk is transmitted by the balls to the spring 16.

The arbor h is extended beyond the rear bearing 9 and is provided with an adjusting-nut 'i, a swivel-block m and an adjusting-nut n in the rear of said block. The block has pins j fitted to the vertical arm of a bell-crank 7c, and the plate e is extended beneath the arbor to support a standard Zior such bell-crank. A set-screw o is supported upon the bed to adjust the plate e, with the arborh and the disk-d, at a slight angle to the disk d;

and bolts 1) are provided to lock the plate to the bed when adjusted.

A thrust-bar s is mounted in a guide r upon the bed under the horizontal arm of the bell-crank, and a cam t is rotated by a cam-shaft'q beneath the bed to raise the thrust-bar when the rollers are placed between the' disks, and thus retract the disk 01 through the agency of the bell-crank; which prevents any grinding of the roller until placed, as shown in Fig. 4.

clear the stationary guide 1', and the arm of the 'bellcrank moves slightly over the head of the thrust-bar whenever the plate e is adjusted. A thrust-collar consisting of a ring 22 and a series of balls 23 is interposed 100 between the swivel m and the nut n, to reduce the friction during the refraction of the arbor h and disk d, in opposition to the spring 16, during the placing of each hub 1) having radialmandrels 'w and mounted upon a spindle a: which is driven,-as shown inFig. 3, by a Geneva stop connection with feed-gearing mounted upon a stud or shaft 3;. The toothed wheelz for the Geneva stop is attached to the spindlex, and a notched disk 110 A hole 11. is formed through the adjustable plate e to carrying the driving-pin 1 is attached to the feed-shaft, and operates to turn the spindle in at intervals, to place the rollers successively between the disks, as shown in Fig. 4; and to lock the spindle while the disks are being' the cam t once for each movement of the carrier.

V employed with a speed of 900 revolutions for the disk I To clear the rollers from the disk d when the disk d is retracted therefrom, the carrier may be moved longitudinally in any suitable manner, as by the rollers 6 mounted upon one bearing of the spindle and fitted to notches 7 in one side of the carrier-hub 1)..

'The carrier is shown splined upon the spindle x (see Fig. 7) and the spindle extended beyond the carrier to receive an adjusting-nut 9 and aspring 8which operates to press the carrier normally toward the roller 6.

As the roll cannot yield, it operates to force the carrier longitudinally upon the spindle when the notches 7 are turned past or away from the surface of the roll, during the placing oi each cylinder between the disks;

the-succeeding notch then coinciding with the roll when such cylinder is properly placed, and permitting the spring to press the carrier back to its initial position. i

The nut i is adjusted to set the disks d, d, at a suitable distance apart ior grinding the cylinder or roller to the required size, and the mandrel w must be adjusted to stand centrally between the disks, so that the roller may be evenly ground; and in practice, the mandrel is made smaller than the bore of the roller to permit the latter entire freedom of movement. It .is found that this construction will grind the rollers cylindrical, it they are close to the cylindrical form before grinding.

The bearings 10 for the carrier spindle are mounted upon an extension of the bed a, and the bearing nearest the carrier is mounted adjustably by means of bolts fitted in-slots l1, and the bearing carrying the roller 6 may thus be adjusted toward or away-from the carrier, so that the mandrels 'w may setcentrally between the disks when adjusted. $uch adjustment of the disks and carrier enables the movable disk 0! to .clear the rollers or cylinders as they are placed in position,

and clears such rollers or cylinders from the other disk d during the placing movement.

, The arbors of the disks are shown-provided with pulleys 12 which are driven' by bolts irom a countershaft in the same direction, but at varying speeds, it being found in practice that a speed of 800 revolutions per minute for the disk d can be advantageously d. The variation in the speed of the disks causes the roller or cylinder to,turn upon the mandrel during the grinding operation and thus expose all parts of its surface uniformly to the grinding action. Such disks are commonly made of cast iron with emery cloth glued upon the grinding surface, which is indicated bythe dots 13 in Fig. 4, and means for turning the disk d at a slight angle is provided to compensate for any unequal Wear of the grinding surface which is due to its higher velocity near the periphery than near to the center of the disk. Such wcar is slight,

3 below the feedand is obviated by loosening the screws p (Fig. l) and turning thescrew 0' until the disk (1 is shifted sulficiently (as may be determined by trial) to grind the cylinders true anduniform. The bolts pare then firmly tightened until another adjustment is required.

The plate 6 is shown in Figs. 1 and 2 swiv'eled upon a block f which is attached to the bed by two screws The plate may be pivoted in any other manner. Fig. l shows provision for varying the length of the thrust-bar s, by which the extreme movement of the disk d may be varied, although the cam 15 has a positive throw. Such variation is effected by dividing the thrust'bar and forming the adjacent ends with right and left hand screw-threads, to which a nut 27 is applied. Grooves or keyways 28 are shown in the two parts of the thrust-bar to hold them from rotation, and the turning of the nut thus serves tov vary the length of the bar as desired.

Fig. 4 shows that the centrifugal force would tend to hold the hollow cylinders or rollers upon the mandrels, but a guard 28 is shown in this figure and in Fig. 2, having a curved edge concentric with the carrierspindle, and serving to positively-prevent the rolls from any material displacement between the grinding surfaces. The guard is shown supported upon the bed a by a foot 27.

Fig. 1 shows a modification of the carrier adapted to place and sustain solid cylinders or rollers between the grinding disks, the carrier consisting of a circular plate 24 with radial notches 25 having their edges concave to approximately fit the periphery of the solid roller 26. Such carrier operates precisely the same as the mandrel-carrier shown in Fig. 4, in placing the cylinders and holding them between the grinding disks. The carrier is arranged with the organization shown in the drawings, to holdthe work-piece horizontally, which permits the work-pieces to be applied to the top of the carrier by hand, or by a suitable feeding-device, and to be discharged automatically from the bottom of the carrier as the pieces are turned away from between the grinding disks. It is not essential, however, to the operation of the machine, that the carrier should hold the work-pieces horizontally during the grinding operation, nor discharge them automatically, as such an arrangement is not essential to the operation of the'parts in the manner described herein.

Having thus set forth the nature of the invention what is claimed herein is;

1. In a grinding machine, the combination, with two onposed grinding disks, of a carrier for placing the workpieces between vthedisks, means for separating the disks during the placing of the work-pieces, and menus for shifting the carrier to clear the work-pieces from the disks.

2. ,In a grinding machine, the combination, with two opposed grinding dlsks, of a carrier for placing the workpieces between the disks, means for separating the disks during the placing of the work-pieces, means for giving the carriern partial rotation to place the work-piece, and means for holding the carrier stationary during the grind; ingot each work-piece.

3. In a'mnchine for grinding loose cylinders, the cont binntion, with two opposed grinding disks, of a carrier having radial mandrels to place hollow cylinders between the disks, and a curved guard fixed between the disks to hold the cylinders upon the mnndrels during the grinding operation.

for shifting the carrier 4. In a machine-for grinding loose cylinders, the combination, with carrier movable longitudinally thereon and having mandrels to carry hollow cylinders, a spring to ,hold the mandrelsnormally midway between the disks, and means in opposition to the spring to clear the cylinders from the disks when placing them between the same.

5. In a machine for grinding loose cylindersfthe combination, with two opposed grinding disks, of a spindle with carrier 'movablelongitudinally thereouand having mandrels to carry hollow cylinders, a spring to hold the mandrels normally midway between the disks, a feed-shaft rotated continuously and a Geneva stop mechanism connecting the feed-shaft with the carrierspindle to turn and lock the sameat intervals.

6. In a machine for grinding loose cylinders, the combination, with two opposed grinding disks,'of a spindle with carrier movable longitudinally thereon'and having mandrels to carry hollow cylinders, a bearing upon the spindle adjacent to the carrier with roll projected toward'the same, with notches in the side of the carrier to engage the roll, a spring to press the carrier normally toward the roll, and means for turning the carrier intermittingly, whereby the carrier is shifted to clear the cylinders from p the disks when placing them between the same.

7. In a machine for grinding loose cylinders, the combination, with a bed, and suitable bearings, of two opposed grinding disks having arbors fitted to the said bearings, one of the arbors and disks being movable longitudinally, a spring to press such disk toward the other, and a stop to limit the movement-of the disk under the pressure of such spring, and thereby limit the grinding operation.

8. In a machine for grinding loose cylinders, the combination, with a bed and suitable bearings, of two opposed grinding disks having arbors fitted to the said bearings,

' one of the arbors and disks beingmovahie longitudinally,

a spring upon said arbor to press such disktoward the other, a stop to limit the movement of such arbor, a camshaft rotated continuously and a cam with connections for retracting the arbor to admit each cylinder between the disks before grinding.

9. A machine for grinding loose cylinders, the combination, with a bed and suitable bearings, of two opposed grinding disks having arbors fitted to the said bearings, one of the arbors and disks being movable longitudinally,

a spring upon said arbor to press such disk toward the other, a stop to limit the movement of such arbor, a collar with two opposed grinding, disks, of a spindle fixed bearings upon the bed,

bination,

bination, with a bed, and suitable bearings, of two opposed grinding disks having arbors fitted to the said bearings, and one of said arbors movable longitudinally, the threaded sleeve between such movable disk and its bearing with adjusting-nut 9 thereon, the anti-friction thrust-collar upon the back of the movable disk, and a spring fitted between such thrust-collar and the adjusting-nut, whereby the disk may be retracted to introduce the cylinders for grinding and the pressure of the disks toward one another by the spring 16 may vbe'a'djusted at pleasure;

11; In a machine for grinding loosecylinders, the combination, with a bed,of a disk with arbor mounted in and an opposed disk movable to and from the first disk and'having arbor with bearings attached to a pivoted plate, the plate being adjustable upon the bed to vary the inclination of the disks toward one another, as and for the purpose set forth.

l -12. In a machine for grinding loosecylinders, the comwith a bed, of a disk witharbor mounted in fixed bearings upon the bed, and an opposed disk movable to tached to a pivoted plate, and the plate and arbor projected beyond the rear bearing, a swivel upon the project ing end of the arbor, a standard fixed to the plate with bell-crank jointed to the swivel, whereby the hell-crank is moved with the plate when adjusted, a cam with camshaft beneathv the bed, and a thrust-bar extended upward through the bedand operating upon one arm of the bellcrank in its various adjustments, to retract the movable disk from the other.

13. In a machine for grinding loose cylinders, the combination, with two opposed grinding disks, of means for rotating them in the same direction at materially different speeds, and means for holding the cylinders loosely and rotatably between the disk during the grinding operation. 4

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses. I

CEPHAS I. SHIRL Y.

Witnesses:

ALBERT WARD, B. G. Kon'rrmn.

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