US1451467A - Work support for roll-grinding machines - Google Patents

Description

Apr. 10, 1923 1,451,467

c. H.- NORTON ET AL WORK SUPPORT FOR ROLL GRINDING MACHINES Filed Feb. 11, 1921 5,- "/7 g T V 3mm Charles H. NorTon AlberT Turner ?atented Apr. 10, 1923.

I} l E.

ASSIGNORS T NORTON COMPANY, OF WORCESTER, MASSACHUSETTS, A COIL PORATION OF MASSACHUSETTS.

WORK SUPPORT FOR ROLL-GRINDING MACHINES.

Application filed February 11, 1921. Serial No. 444,205.

To all to [tom it may concern:

Be it-knoWn that we, CHARLES H. NoRroN and ALBERT TURNER, citizens of the United States of America, residing at Worcester, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in a Work Sup-,

port for Roll-Grinding Machines, of. which the following is a full, clear, and exact specification.

Our invention relates to grinding machines, such as the roll grinding machine shown and described in patent to Norton No. 1,096,188 dated May 12, 191 and more 16 particularly to a work support for such machines.

In the grinding of large rolls, such as are used in steel rolling mills, paper milis and so forth, it is the practice, on account of their 20 great weight, to support and rotate them on their journals instead of on centers in a manner to permit of grinding the journals while so supported and also the working periphery of the rolls. In some instances the bearing or rest for the roll journals has been provided with means for raising or lowering one end of the roll to bring its axis into parallelism with the axis of the grinding wheel, so that a smooth cylindrical surface is produced when the rotating grinding wheel is moved axially along the roll in operative engagement therewith. A plurality of adjustable work engaging shoes have been provided on each rest which are individually adjustable toward and from the roll axis, whereby, by adjusting all of these shoes, it is possible to raise or lower the end of the roll to bring its axis in proper relation to the grinding wheel axis. The proper adjustment of these shoes requires much time and accurate measurement, the adjustment of one obviously requiring adjustment of all the rest of the shoes on the given journal rest to bring them into proper relation with the journal axis and prevent marring the journals while rotating in the rest.

It is an object of our'invention to overcome these difficulties by providing a simple means for readily and precisely adjusting the journal bearings to bring about a proper relation between the roll axis and the axis of the grinding wheel.

It is a further object of our invention to the-prior patent above referred to.

provide a journal rest which is easily and economically manufactured, can be readily replaced by a rest of different size to accommodate work of different diameter and which embodies inits construction simple and eflicient means for holding. the roll against endwise movement.

In the accompanying drawings, which form a part of this specification and in which like reference numerals indicate like parts:

Figure 1 is a rear view of a grinding machine embodying our invention, showing a roll in position on the journal rests and a grinding wheel in operative relation to the roll, parts of the base being broken away;

Fig. 2 is an end elevation of the parts shown in Fig. 1, parts being shown in section to more clearly show the means for moving the journal rest on the base;

Fig. 3 is an enlarged front elevation of the left-hand journalrest showing the roll in position and also showing certain parts in section; and

Fig. i is a detail view showing the means for adjusting the journal rest transversely.

In the practice of our invention, we employ a journal rest having a pair of fixed 7 bearing shoes, preferably boredto the'same axis, these bearing shoes being preferably mounted on a vertically movable shoe holder, such movement being preferably effected by mounting the shoe holder on the base of the machine so as to have pivotal movement in a vertical plane, and by providing simple means, such as a screw, for adjusting the holder on itspivot to raise or lower the work shoe as required to bring the axis of the roll into proper relation with the wheel axis for the desired grinding operation.

In the specific embodiment of our invention selected for illustration, we have shown a roll 1 rotatably supported with its journalsQ resting on 'thejournal rests 3 and 4, these rests being in. turn adjustably mounted on the bed or base 5 of the machine to provide for the support of rolls of different lengths. We have indicated the grinding wheel at 6, it being mounted for rotation on its axis and reciprocation along the roll to grind the entire surface of theroll in any suitable manner, such as that showr i in means for moving the journal rest along the bed may comprise a rack 7 on the bed meshing with a pinion 8. on the transverse shaft 9 mounted in the base portion 10 of the rest, this base portion being provided with a V- way 11 and a fiat way 12 mating with corresponding ways on the bed. The shaft 9 may be rotated by a crank arm 13 at the rear of the base portion 10 which is connected to drive the shaft through the gearing l-it. A suitable clamping means 15 is provided for locking the rest in adjusted position on the bed of the machine.

To provide for ease of manufacture and to avoid machining and scraping of parts to bring the axis of the roll journal in proper relation with the wheel axis and also to permit ready interchangeability of parts for different sizes of rolls and roll journals, we

mount the work supporting shoes so that they can be readily moved to some extent both vertically and horizontally to bring the roll axis into proper relation with the grinding wheel axis. In Fig. 1, we have shown only one oi the journal rests, the one designated by numeral 4; and shown in detail in Figs. 2, 3 and l, equipped with means for adjusting the work shoes transversely toward and from the grinding wheel axis. It may in some cases be desirable to equip both rests with such means. We accomplish this adjustment by mounting the work shoes on a transverse slide 16 guided on a dovetailed guiding member 17 provided with the usual gib 18. Theslide is shifted transversely by means of an adjusting screw, indicated at 19 (Fig. 1) and shown more in detail in Fig. 1, provided with a micrometer head and locked ir, position bya stop screw bolt 20. To allow the work shoes to follow the movements of the roll when one end is swung transversely by moving the slide 16, we mount the work shoe carrier 21 on the slide 16 in the case of the rest 4 and on the base portion 10 in the case of the rest- 3, so as to be capable of rotating about a vertical axis. which may comprise a vertical stud 22 carried on the slide and base portion respectively and having a swivelling fit in a hole on the work carrier.

Heretotore, it has been customary to mount the work shoes directly on the swivelling member, necessitating that they be made adjustable to properly it them to the roll journal, and to raise or lower one end of the journal through a small distance to bring the roll axis in the horizontal plane of the wheel axis, this relation of the parts being necessary for grinding precise cylindrical work. To effect this required individual adjustment of the shoes, in cases where three shoes, one lower shoe and two lateral shoes. are employed. vertical adjustment of the lower shoe will obviously change the relation between the other two shoes and the roll and require adjustment of them likewise,

which involves a long and tedious operation. In our present construction we employ work bearing members or shoes 23 and 24 which are rigidly connected to a, work shoe holder 25 as by bolts 33. The holder is in turn mounted to swing about a horizontal axis which may be and preferably is arranged at one side of the vertical plane passing through the roll axis, so that swinging oi the holder on its axis will raise or lower the roll. side of the roll away from the work, swinging the holder upwardly on its pivot will also move it slightly away from the wheel, but because of the position of the pivot relative to the roll axisthis movement is very small and of no practical consequence in ordinary grinding operations. Furthermore, correction can be made for this movement, if desired, by moving the transverse slide 16.

The work shoes are preferably supported by a three point support to avoid all tendency to rock and are connected to the holder 25 as by bolts. Each pair of shoes is bored to the desired size after being bolted in place so as to avoid machining operations when the" shoes are fitted to the holders. This greatly simplifies the process of manufacturing the rests. Likewise, the holders aresupported on the carriers by a three point support for a similar reason and to provide a construction which lends itself readily to pivoting the holders on the carriers and to lifting them oii'the carriers when desired. Adjacent the rear end of the carriers they are formed with V-shaped grooves 26 and 27 extending toward the middle of the carrier. or these grooves may be extended to form a continuous groove from one side to the other, if desired, These grooves are adapted to receive the substantially cylindrical hinge members 28 and 29 formed integrally and on opposite sides of the holder 25. The forward under side of the holder is formed with a projection 30 resting on the head of a heavy adjustable screw bolt 31 screwed into the carrier adjacent itsforward end. The hinge members 28 and 29 and the projection form a three point support for the shoe holders, and it will be apparent that Since the pivot is on that rotation of the screw bolt will raise or lower the axis of the roll, depending upon the direction of rotation.

For plain cylindrical grinding, it might suiiice to make only one of the shoe holders 25 pivoted on its carrier 21 and have the other holder rigid or even integral with its carrier, but by making both shoe holders pivoted as described, it is possible to tilt the roll so as to bring the center of its axis in the same horizontal plane with the wheel axis, while the axis of the roll at its ends is respectively higher and lower than said plane.

hen the wheel has now traversed along can be made to accommodate such rolls by substituting another set of bearing shoes bored to fit the diameter of roll journal being ground.

It will be noted by referenceto Fig. 3 that the shoes are formed with their under sides facing the shoulder on the roll with a reduced extension 32 which serves, by engagement with the shoulder on the roll, to prevent endwise movement of the roll during the grinding operation. The shoes are thus made to serve two purposes; namely, to.

support the roll journals and to prevent longitudinal movement thereof, thus making it unnecessary, in certain cases, to provide the usual centers for the latter purpose.

In the operation of our device, work shoes are selected to fit the roll journals of the roll which it is desired to grind and the shoes are rigidly fastened in place on the shoe holders by means of the bolts 33. One

or both ournal rests are then bodily moved along the base to fit the length of the roll, and to support the roll in proper position longitudinally of the bed or base 5. The roll is then placed in position on the rests with its shoulders adjacent the thrust receiving portions or extensions 32 of the shoes. The roll is now rotated by any suitable means, such, for example, as that shown in the prior patent, and the rotating grinding wheel fed inwardly toward the work and traversed past the work in the usual manner. If it is found that the roll axis is not in proper relation to the grinding wheel axis, such as is required where work must be true within a fraction of a thousandth of an inch, it can be very readily brought into the proper relation by means of the transversely adjustable slide 16 and the vertically swinging hearing or shoe holders 25,

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

1. A. journal rest for a roll grinding machine comprising a base, a work shoe holder mounted thereon, work supporting shoes on. said holder, and means for moving the holder and shoes vertically to bring theroll axis into proper relation with a grinding wheel.

2. A grinding machine having a bed provided with parallel ways and a grinding wheel carriage mounted for reciprocation on said ways, comprising a work shoe holder pivotally mounted on said bed, work supporting shoes on said holder, and means for swinging said shoe holder and shoes in a substantially vertical plane for bringing the work axis into proper relation with the grinding wheel axis.

3. In a grinding machine having a bed provided with parallel ways and a grinding wheel carriage mounted for reciprocation on said wave, in combination, a journalrest slidably mounted on said ways and comprising a base, a cross slide mounted on said base, a shoe holder mounted on said slide. bearing shoes rigidly connected thereto, and means I for vertically adjusting said shoe holder and shoes to bring the work axis into proper relation with the grinding wheel.

4:. A journal rest for roll grinding machines comprising a base, a work shoe holder for supporting the roll journal pivotally mounted on said base, said pivotal connection comprising an elongated depression on one of said members and a cooperat ing projection on the other of said me1nhers, and means for swinging said shoe holder on its pivotal connection to more the end of the roll vertically.

5. A journal rest for roll grinding ma chines comprising a base, a work shoe holder for supporting a roll freely mounted thereon for pivotal movement in a vertical plane, said pivotal connection comprising a pair of spaced depressions on one of said members, and a pair of cooperating projections on the other of said members, and adjustable screw threaded means for swinging said holder in a vertical plane about said pivotal. connection. j

6. A journal rest for roll grinding niachines comprising a base, a shoe holder pivotally mounted thereon for movement in a vertical plane, said pivotal connection comprising a substantially V-shaped bearing groove on one of said members and a rounded bearin 'portion on said other mem her and normally located in said bearing groove, and means'for swinging said shoe holder about its pivotal connection.

7. A journal rest for roll grinding machines comprising a base and a shoe holder freelv mounted on said base for pivotal movement in a vertical plane by a three point support, two of said supporting points forming hinge members, and the third com-- prising adjustable means to swing the holder on its hinged members.

8. A journal rest for roll grinding machines comprising a base, a shoe holder pivotally mounted thereon for movement in a vertical plane, said pivotal connection comprising two spaced depressions on one of said members and cooperating rounded pro jections on the other of said members forming two members of a three point support :'or said holder, and means forming the third member of said support and adjustable to swingsaicl shoe holder about its pivotal con nection.

9. A Work support for rolls having journals of reduced diameter forming shoulders with. the body of the roll, comprising a heel, journal rests supported there-onancl sets of bearing shoes on each journal rest, one shoe of each set being formed with a, thrust receiving part for engagement with the adjacent shoulder on the roll to prevent encl- Wise movement thereof.

10. A roll'grincling machine comprising :1 bed and Work supporting means thereon, said reams? work supporting means comprising hearing members for receiving the roll journals, means permittingswingingof said members in a horizontal plane, means per mitting movement of said members in a vertical plane, and means for moving one of said members transversely, whereby the hearing members may he moved to position the roll axis with relation to the grinding wheel axis and to align themselves with the roll journals.

Signed at Worcester, Massachusetts. this 9th clay of Feb, 1921.

CHARLES H. NORTON. ALBERT TURNER.

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