US1577353A - Steady rest - Google Patents

Description

March 16 192632 s. EINSTEIN El' AL STEAM REST Fild Feb". 27, 1924 --r-nr Patented Mar. 16, 1926. l

UNITED STATE sv PATENT OFFICE.,

SOL EINSTEIN, OF CINCINNATI, AND HERNAN R. ISLEB, OF NORWOOD, OHIO,LI AB'- SIGNORS TO THE VCINCINNATI MILLING NATI, OHIO, A CORPORATION OE OHIO.

MACHINE COMPANY, F OAKLEY, CINCIN- STEADY REST.

Application led February 27, 1924. Serial No. 695,518.

To all wlwm t may concern; I

Be it known that we, SOL EINSTEIN and HERMAN R. IsLnR, each a citizen of the United States, and` residing, respectively, at Cincinnati and Norwood,\in the county of Hamilton and State of Ohio, have invented a new and llmproved Steady Rest, of which the following specification is a lull disclosure.

'lhis invention relates to grinding machines of the type adapted to operate on cylindrical work such as rollers, shafts, etc., and it deals more particularly with means for holdig the work rigid against deflection during the action of the grinding wheel while yet permitting :tree rotation thereof. 'lhese machines, as usually constructed, comprise a rotatin grinding wheel, means for supporting andT rotating the work, and means for eecting a`relative translation between the work and the grinding wheel, whereby all portions of the work may be brought to the action of the grinding wheel. Means are also provided for producing a relative movement between the work and the grinding wheel transverse to the axis of the work to cause the grinding wheel to gradually reduce the diameter of the work.

W hen grinding work of substantial length 3@ the pressure of the grinding wheelthereon causes more or less deflection and vibration o the' work` With the result that it is slightly bowed and the precision is diminished.

This invention has for an object to provide an improved form of steady-rest for preventing deiiection and vibration of the work when presented to the action ot the grinding wheel and to provide improved means `for maintaining the steady-rest in m Contact with the work as it is gradually decreased in diameter.

lni operation, the' grinding wheel exerts both an outward and downward strain on the work and to resist this strain certain steady-rests have heretofore been provided having work-engaging surfaces located be 'de of the axis of the work.

low and at one si rlhese devices have in some instances included a steady-rest shoe in both vertical and horizontalplanes to keep its work-engaging surfaces in contact with the work and were provided with independent means for shiftyin Isaid .shoe in each of saidplanes. To

eligect a proper adjustment of the shoe tow.

maintain its workenga ing surfaces in contact with the workY it as heretofore been necessary to simultaneously adjust both of the shifting means the same amount', and

when so adjusted the resultant motion of the shoe was obliquely upward toward the work.

Devices requiring this double adjustment have been unsatisfactory for the reason that the1r adjustment `requires the use of both of the operators hands, and furthermore that 1t is practically impossible to adjust both of the shifting means synchronously, as is necessary to effect a proper movementof the steadrest shoe.

'.lhis invention thereforehas for an object to provide a work-support for grinding maclnnes in which the steady-rest is so mountr ed that by a single adjusting means the shoe may be moved both outwardly and upwardly to. kee its work-enga ing surfaces in contact with t `e work, where y a substantially uniform working condition may be easily and conveniently maintained during-the entire grinding operation.

@ther objects and advantages will be in4 part indicated in the following descriptiony and in-part rendered apparent therefrom in connection with the annexed drawings.

4Vllo enable others skilled in the art so fully to apprehend the underlying features hereof that they may embody the same in the various ways contemplated by this invention, drawings depicting a preferred typical construction have been annexed as a part of this disclosure and, in such drawings, like characters of reference denote corresponding parts throughout all the views, of vwh1ch: 7

Fig. 1 is a side elevation of a portion of a grinding machine equipped with a preferred embodiment of the present invention. Fig. `2 is a section substantially on the line 2-2 of Fig. 1. Fig. 3 is a right end elevation of a portion of the improved steady-- rest showing it fitted with a work-holding shoe adapted to hold very small work, and

,Figi l is a section on theline 4- 4 of Fig. 2.

Referring more particularly to the drawings the invention is disclosed in its preerred form as embodied in a grindin machine comprising a table upon whic are mounted various parts of the grinding machine including a standard 2. The work ios to be ground may be rotatablv held as u on non-rotating centers c and e or in any ot er manner common to grinding machines. grinding wheel W, adapted to operate on the work, is mounted and rotated in any suitable manner. Conventional means may also be employed for rotating the work and for ei'ecting a relative movement between the work and the grinding wheel both lengthwise of the 'work and transverse thereto. As the mechanism for producing these movements form no part of the present invention illustration and description thereof is deemed unnecessar It has been foun #that `the pressure of the grinding wheel against the work, especially when it is of substantial length and of relatively small diameter, causes the work to yield with the result that imperfect work is produced. ATo remedy this defect this invention proposes a steady-rest adapted to bear against the work at the side o posite to that at which the grinding wheel 1s located. j

To this end there is adjustably secured upon the standard 2 a saddle 3 formed at one end with an inverted V-shaped guideway4 which embraces a guide 5 provided by the standard 2. The opposite end 6 of the saddle rests upon the inclined upper surface 2a of the standard 2. A thumb-screw 7 threaded into the saddle bears upon a clamp-plate 8 which serves to locl the saddle in its adjusted positions on the standard. The saddle 3 is formed with an upwardly extending arm 9 to which is pivoted, at 10, a carriage 11 of substantially inverted U-shape in cross-section, thus providin depending side-walls 12 at opposite sides o lthe saddle.

Upon the carriage 11 is removably secured, as by means of dowel pins 13, worksupporting blocks or shoes 14 providing converging work-engaging surfaces 15 which are adapted to be brought into contact with the work prior to the beginning of a` grinding operation, while the work is held between the centers c and c. As will readily be understood the diameter of the work is gradually decreased during ,the grinding operation and therefore the surface of the work would be gradually withdrawn from contact with the work supporting block were the latter permanently fixed.

An important feature of this invention, now to be described, consists in providing a single, simple and eiiicient means for gradually shifting the work-supporting block to compensate for the reduction in size of the work, whereby a substantially uniform working condition is maintained during the entire grinding operation and deflection of the work is positively prevented.

Upon the underside of the carriage 11 and between the walls 12 is formed a lug 16 providing a cam-surface 17 a ainst which is adapted to bear the rounde end 18 vof a saddle 3. A knurled head 21 affords con- A venient means for manually rotating the screw 19 to cause it to be threaded through the boss 20. 'Thus it will be seen that as the diameter of the work is reduced, which would normally separate the work from the surfaces 15, ythe screw 19 may be rotated which, by means of the end 18 of the screw contacting with the cam-surface 17, will cause the carriage 11 and therewith the block 14 to be moved in an arcuate path outwardl and upwardly to the right as viewed in` i 2. By this sin le-adjustment surfaces15 wi be caused to ollow-up and engage the gradually decreasing work and hold it yrigid against the outward and downward pressure of the grinding wheel.

In quantity roduction it is desirable to provide means or automatically calibrating the work or in other words to insure that each piece will be ground down to a predetermined size. To this end an adjustable stop is provided by means of which the rotatlon of the screw 19 (and thereby the upward and outward adjustment of the block 14) may be limited. This stop may conveniently consist of a split collar 27 adjustably secured, as by means of a clamp screw 28,

upon the outwardly projectin end of the screw 19. This collar 1s forme with an arm 29 adapted, upon rotation of the screw, to Contact with a stop-pin 30 fixed in the saddle 3. Thus it will be seen that by loosening the clam -screw the collar 27 and the arm 29 may e adjusted about the axis of the screw to any desired osition and again locked to the screw 19. predetermined rotation of the screw will then bring the arm into con# tact with the stop pin 30 which indicates to the operator that the work has been reduced to a predetermined size and should be removed from the machine.

To overcome slight inaccuracies in manufacture and to insure that the work-supporting surfaces 15 will initially contact with the work properly, the'carriage 11 is pivotally supported on eccentric pins 22 and 23 formed integral with the shank 24 of the pivot 10 held in the arm 9 of the saddle. A. knurled wheel 25, secured to the pin 22, affords means for rotating the pivot pin 10 and a knurled nut 26 threaded upon the pin 23 adords means for locking it in adjusted position. By loosening the nut 26 and rotating the pivot pin the carriage 11 and the work-supporting block may be shifted bodily until the surfaces 15 properly contact with the work and in this position they may be held by again tightening the lock nut 26.

Without further analysis, the foregoing will so fully reveal the ist of this invention that others can, by appying current knowledge, readily adapt it for variousl utilizations by retaining one or more of the featitl lUU

art, fairly constitute essential characteristics .of either the generic or specic aspects of this invention and, therefore, such adaptations should be, and are intended to be, coml prehended within the meaning and range of equivalency of the following claims.

/Having thus revealed this invention, we claim as new and `desire to secure the following combinations and elements, or equivalents thereof, by Letters Patent of the United States:

1. A grinding machine combining a able, a grinding wheel; a saddle supported sdrddle; a work-supportingv block carried by said 'member vand adapted to engage the work at the side opposite said grinding wheel; and a single means for adjusting said member about its pivot to move it upwardly and outwardly so as to maintain said work-supporting block in contact with the work durin a grinding operationo 2. A in ing machine combining a table; a grin ing wheel; a standard carried 3i lsaid table; a saddle. adjustably .moun

upon said standard; a member pivoted to said saddle at \a point substantially above the axis of the grindin wheel; a worksupporting block secure to said member and adapted to engage the work at one side of and below the axis thereof; and a single means having a micrometer adjustment for swinging said member about its pivot to move said work-sup orting block upwardly and towards the w eel for maintaining it in contactwith the work during a grinding operation.

3. A work-sup ort for grinding machines combining a sa dle; a support for said saddle; means for securing said saddle to its support; a carriage pivoted to said saddle at a point substantlally above the axis of the grindin wheel; a work-su porting block carrie by said carriage and) having v-converging work-engaging. surfaces; and

means for swinging sald carriage about itsY pivot to move\thefworkengag1ng surfaces of the work-supporting block upwardly andoutwardly for maintaining it in contact with the work during a grinding operation, fsaid last named means comprisin a lu carried by said carriage, a screw. lreade through a portion of said saddle and havirg an end enga ing said lug, and meansl for e ecting manua rotation of said screw.

4., A work-supportin for grindin machines combining a sad e; in incline sup'- port for said saddle; clam ing means for adjustably securing said sa dle to its supsaid table; a member pivoted to said' port; an upwardlyextending arm on said saddle; a carriage pivoted to/ said arm at vone side of and above the axis of the' work;

a `work-supporting block secured to said carriage and having inclinedA work-engaging surfaces; and a single manually actuated means carried by said saddle and acting upon said `carriage ,to move the carriage and thereb v the work-supportingpblock upwardly an outwardly aboutthe pivot of said carriage and toward the work to keep said surfaces in contact with the work during a grinding operation.

5., A work-support for grinding machines combining a table; an inclined standard carried by said table and terminating at the top in a guide; a saddle fitted to said guide and having its lower end-seated upon the inclined upper surface of said standard; an upwardly extending arm on said saddle; a member pivoted to said arm and provided with side walls depending at opposite sidesof said saddle; a work-supporting block re. movably secured to said member and provided with inclined work-engaging surfaces, and adjusting screw threaded in said saddle and having an end contacting with'` said member between its depending walls and means for effecting manual adjustment of said screw to move said member and the work-supporting. block to maintain the work-engaging walls thereof in contact with the, work during `a grinding operation. 6. A work-support for grinding machines combining a saddle; a support for said saddle; a member 1pivoted tovsaid saddle a work-supporting b ock carried by said member.; means for swinging said member about its pivot to move it upwardly and outwardly so as to keep the work-supporting block in contact with the work during a rinding operation; and means pivotal oint of said member bodi y on said saddle to effect an initial setting `of said block with respect to the work. l

7. A work sup ort for grinding machines combining a saddle having an arm; a support forsaid saddle; a ivot-pin 'journaled inV` said a'rm and provi ed with eccentric portions; a member pivoted upon said eccentric portions; a work supporting block carried by said member; means for manually rotatin said pinto cause its eccentricA portions tos ift said member bodily; andl means for locking. said pin in its adjustedposition. y l

In `witness whereof, we have hereunto subscribed our names.

' SOL EINSTEIN.

, HERMAN R. ISLER.

for 'shifti-n the f

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