US1465538A - Grinding machine for forming rolls - Google Patents

Description

Aug. 21, 1923. 1,465,538"

H. WICKSTROM ET AL I GRINDING MACHINE FOR FORMING ROLLS [7 Filed May 21 1921 sl/6' l5 ITNESSES INVENTOR S I v i cw Patented Aug. 21, 1923.

UNEFBE STATES attests earner castes,

HANS WICKSTROM AND PATRICK J. SHEA, 0F WORCESTFR, MASSACHUSETTS,

ASSIGNOBS TO NORTON COMPANY, OF WORCESTER, MASSACHUSETTS, A COBPO RATION OF MASSACHUSETTS.

GRINDING MACHINE FOR FORMING ROLLS.

Application filed "may 21,

To all, whom it may concern Be it known that we, HANS WIoKs'rRoM and PATRICK J. SHEA, 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 Grinding Machines for Forming Rolls, of which the following is a full, clear, and exact specification.

-Our invention relates to grinding machines for forming rolls, and more particularly to machines having the roll forming attachment shown and described in an application of-C. H. Norton, Serial No. 435,095, filed Jan. 5, 1921.

In the machine referred to, it is proposed to form rolls on the well known form of plain cylindrical grinding machine, such as is disclosed in the patent to Norton No.'762,838 dated-June 14:, 1904, in which. the work is mounted on a swivel table which is in turn mounted on a sliding table to be very accurately formed to produce the.

exact form of roll desired, and if made to form theoretically accurate rolls, in practice it is found that the bar will frequently have to be re-scraped or ground, due to the inherent characteristics of the machine in which it is to be used, in order to produce a roll of the exact shape desired. This scraping toget the exact form of bar re quired is of course a slow and tedious operation. Furthermore, it becomes necessary to supplya separate .bar for each form of roll it is desiredto grind on any particular machine, which involves considerable expense and. delay in changing the bar. Since a bar'can be used-only on the particular machine for which it is fitted, its use is further limited byxthis consideration.

Itisthereforean object of our invention 1921. Serial No.471,413.

to overcome these difliculties by making the forming bar itself adjustable in thickness at a plurality of points along its length so that its form can be readily and quickly changed to suit the machine on which it is to be used and to adapt it to grind rolls of different forms.

Referring to the accompanying drawings, in which like reference characters indicate like parts:

. LFigure 1 is a front elevation of a machine equipped with the forming attachment with which our improved forming bar is adapted to be used;

Fig. 2 is a plan view of the work table of the machine shown in Fig. 1;

tional view through the roller-carrying brackets, lower table and base, showing the forming bar in section in its position be-.

tween the rolllers, the section being taken approximately on the line 3-3 of Fig. 1;

Fig; 4 1s a fragmentary plan of parts shown in Fig. 3;

Fig. 3 is an enlarged fragmentary sec- Fig. 5 is a plan view of the forming bar, I

parts being broken away, and Fig. 6 is a similar view on an enlarged scale'to more glearly show the means for adjusting the In the specific embodiment of our invention selected for illustration, we have shown our device applied to a grinding machine of the type shown in the patent above referred to, and in which the work table 1 is mounted to slide longitudinally on the usual v ways on the base 2 and is provided with the usual means for traversing it either by hand or, automatically, as is fully described in said prior patent. In Fig. 3 we have shown only the hand traversing means, which con.- sists of a. rack 3 rigidly connected to the under side of the table 1 and'driven from the hand wheel} through the gearing 5, shaft 6 and pinion 7, the latter engaging the teeth of the rack. On the table 1 is mounted the transversely movable table 10 which may be of the usual swivel construction, the pivot being indicated at 9 (Figs. 1 and 2). On

and tailstock 12 which may be of any suitable construction for supporting and rotating the work.. Where the work comprises a heavy roll 13 having end bearings 14,

.the table 10 are mounted the headstock 11" we preferably support 1t in work supports 15 with or without the use of the tailstock and rotate it by having its squared end 16 engage a similarly shaped openlng 17 1n a driven member 18 on the headstock 11. We have shown the latter as being motor driven in a manner similar to that shown in the atent to C. H. Norton No. 1,152,434 dated beptember 7, 1915. We do not desire to be limited to the specific manner of supporting and rotating the work which is merely illustrative and forms no part of the present invention.

In order to eifect a relative transverse movement between the tables 1 and 10 while the work is traversing past the grinding wheel 19 to give the desired form to the work, we provide opposed follower members such as the rollers 20 and 21 between which is supported a forming bar 22 of de sired configuration and these rollers are held against the opposite sides ofthe bar by any suitable means such as the spring 23. In the present instance we have shown our device adapted for crowning rolls and the rollers are arranged adjacent one end of the tables while the table 10 is swivelled as at 9. The forming bar may be tapered from end to end. It is supported by a block 25 (Figs. 3 and 4) between the rollers and a bracket 26 (Fig. 1) extending upwardly from the base. The bar is pivoted to this bracket to allow swinging movement there of. We may connect the bar as by screws 28 to a short arm 29 which is in turn pivoted at 27 to the bracket 26.

In order to avoid the necessity of carrying a number of bars with each machine where it is desired to grind rolls with difierent heights of crown, for example, on the same machine, we make the forming bar 22 adjustable in width, and we may accomplish this by the construction shown in Figs. 3 to 6. We have there shown the forming bar as being split, as by means of a saw cut 31, substantially from end toend (see Figs. 5 and 6) and as being provided at a point intermediate its ends and preferably at, frequent intervals along its length with push and pull screws 32, 33 arranged in pairs. Dowel pins 34 are also provided at different points along the length of the bar to hold the split parts of the bar in suitable opposed relation. It will be understood that the screws 33 for pulling the split portions of the bar together have their heads 35 arranged in countersunk recesses so as to be at all times below the surface on which the rollers travel while the push screws 32 are also at all timesbelow the surface of the bar. These pairs of push and pull screws can be arranged at suitable intervals along the bar, and .we have found that spacing them about 4 inches apart will make pro- VlSlOIl for a very accurate adjustment of the bar. By this arrangement the bar can be pivots arranged in opposed relation at the right-hand end of the tables as shown in 1 Figs. 1 and 2. The inner roller 20 is'located in a downwardly opening recess 36 formed in a bracket 37 which is preferably removably secured to the end of the swivel table 10 as by screws 38. A headed stud 39 supports the roller and serves as a pivot pin therefor. We have shown this stud securely held as by set screws 40 in a hole in the bracket 37. The outer roller 21 is shown supported in a bracket 41 suitably connected to the table 1. We have shown it formed integrally with the table to provide a rigid construction and to render its manufacture easy. An upwardly opening recess 42 is provided in this bracket to receive the roller 21 and a hole is provided in the bracket below said recess and opening thereinto to receive the lower end of the stud 44 on which the roller is, pivoted. The upper end of said pin extends into a hole 45 formed in a top plate 46 closing the recess in the bracket and secured thereto by screws 47.

It may be desirable, under certain conditions, to effect a slight lateral adjustment of one of the rollers 20 or 21. We have provid'ed a construction in which the axis of the v roller 21 is made adjustable and we conveniently accomplish this adjustment by making the part 48 of the stud 44 on which the roller is pivoted eccentric to the end portion, by extending the upper end portion beyond the top plate 46, and forming it with a squared portion 49 for engagement with a suitable tool for rotating it. Rotation of the stud will obviously shift the axis of rotation of the' roller 21. We may provide this stud between the squared portion 49 of the top plate 46 with a' tapered collar 50 provided with graduati ns 51 cooperating with a suitable index 5 on the top plate for indicating the amount of lateral movement of the roller axis and consequently of the end of the swivel table. When once adjusted, the stud is locked in place by suitable clamping screws 53.

In the operation of our machine, supposing that it is desired to grind a roll with a given amount of crown and so that the surface of the roll is curved uniformly from end to end, a templet or forming bar 22 is adjusted by the screws 32, 33 to give it a substantially straight taper (from end to nd. The table 14% fil'fil mOVed to bring one end of the roll, let us say the left-hand end, Figs. 1 and 2, opposite the grinding wheel and the grinding wheel is fed into contact with the roll by the usual feeding mechanism indicated at 61, Fig. 1. If the roll is cylindrical and its axis is parallel with the path of reciprocation or the ways of the table 1 when the grinding wheel is opposite the longitudinal center of the roll, then with the parts in the position first supposed, the left-hand end of the roll is nearer to the grinding wheel axis than the righthand end. As the table is traversed to the left from this position, the swivel table is swung by the tapered bar until the work axis is parallel to the table ways when the wheel is opposite the center of the roll and from there on the roll axis will incline in the opposite direction to the table ways until the wheel again touches the roll at the right-hand end. The grinding is then continued until the wheel has ground the entire surface of the roll and the roll has reached the desired dimensions. If the roll axis should happen to be slightly out of alignment with the table ways, and this can be determined by calipering the opposite ends of the roll after they have both been ground to some extent, in which case they will be of different diameters, it will be necessary to effect some adjustment to bring about correct alignment. This is conveniently accomplished in our device by applying a wrench to the squared portion of the stud on which the roller 21 is eccentrically pivoted and moving the nivoteither toward or away from the axis of the roll as may be required to effect the necessary alignment.

If it is found that the roll does not have the desired shape due to the spring of the table or from other causes, the forming bar is adjusted to correct such inaccuracies in form of the roll and this can be very quickl done by my improved construction. t will be seen then that we have provided a very simple and convenient device for adapting the forming bar to the inherent characteristics of different machines, or for adapting it to the same machine under different conditions of o eration, such as would be met with grin ing rolls of different sizes and with different heights of crown.

While we have shown our improved formin device used in connection with the speci 0 machine disclosed and claimed in the application above referred to, it is obvious that changes may be made in the specific construction of our device and that equivalent elements may be substituted for parts herein disclosed without departing from the scope of our invention as expressed in the claims appended hereto.

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

1. A grinding machine having relatively reciprocating work and wheel supports, one of said supports being also movable transversely during reciprocation to form the work, a follower on said transversely movable support, a forming bar against which said follower is held during reciprocation, and means to position the bar and hold said bar and follower in engagement during reciprocation, said forming bar having means for adjusting its width at a point intermediate its ends.

2. A grinding machine having relatively reciprocating work and wheel supports, one of said supports being also movable transversely during reciprocation to form the work, a follower on said transversely movable support, a longitudinally divided forming bar against which said follower is held during the reciprocation, means for adjusting the width of the bar at a plurality of points along its length, and means to position the bar and hold the bar and follower in contact during reciprocation.

3. A grinding machine comprising a base, a reciprocating table thereon, a transversely movable work-carrying table mounted thereon, a, follower on each of said tables, and means including a forming bar held against longitudinal movement and extending between said followers to move the tables relative to each other as they reciprocate, said bar being adjustable in width at a plurality of points along its length.

4. In a machine for grinding cylindrical work, a forming bar split in a plane at right angles to its operative surface, and means for adjusting the width of the bar andfor holding it in adjusted position.

5. In a machine for grinding cylindrical work, a forming bar split in a plane at right angles to its operative surface, means for ad usting the width of the bar at a plurality of points along its length and for holding it in adjusted position comprising push and pull screws arranged in pairs, and means for holding the split portions of the bar in opposed relation.

Signed at Worcester, Massachusetts, this 20th day of May 1921.

HANS WICKSTROM. PATRICK J. SHEA.

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