US1040470A - Grinding-machine. - Google Patents

Description

w. VAN NOSTRAND.

GRINDING MACHINE.

, APPLICATION FILED JAR, 1912, I 1,040,470, Patented 0ct ..8, l91&

a sun's-kinship u r B G J 7L ,P, I I

awve nfoq w. VAN NOSTRAND. GRINDING MACHINE.

AYPLIOATION FILED 3111.22, 1012.

1,040,470. Patented Oct. 8, 1912.

2 BHEBTS-SHBBT 2.

' v V W V Qttomwga WILLIAM VAN NOSTRAND, 0F DALTON, NEW YORK.

GRINDING-MACHINE.

Specification of Letters Patent.

Patented Oct. 8, 1912.

Application filed January 22, 1912. Serial No. 672,593.

To all whom it may concern:

Be it known that I, WILLIAM VAN Nos- 'IRAND, a citizen of the United States, residing at Dalton, in the county of Livingston 5 and State of New York, have invented certain new and useful improvements in Grinding-Machines; and :I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use 'the same. I

This invention relates to grinding and polishing, and more especially to machines forgrinding plane metal surfaces 3 and the object of the same is to produce a machine of this character moreparticularly adapted for dress-ing metal segments by means of an emery wheel.

To this end the invention consists in the machine described below and which includes a disk to,,which the segments may be attaohed when they are to be ground, although it is possible to remove the disk from its shaft and substitute the entire mill wheel, leaving the segments,in place upon it.

The following specification describes my invention in detail, reference being had to the drawings wherein Figure 1 is a side elevation of this machine complete, and Fig. 2 is a plan view thereof. Fig 3 is a vertical section, on the line 3 3 of Fig. 2, and Fig. 4 is a cross section on the line 4-4 of Fig. 3.

In the drawings I have shown in Fig. 4 a complete mill wheel M carrying segments '8 on its face, as the wheels are sometimes manufactured; and l have illustrated in the other views a disk 1 against whose face said segments may be secured by bolts 2 after they have been removed from the face of the wheel M, the disk or the wheel being mounted removab'ly upon a shaft "3 in'any suitable vman'neras by means of a nut,, 8. I make this -1explanationabcoiuuse it is, sometimes possible to bringtlie-sentireFmillmvheeltothe grind ing machine and thus obviate the necessity of removing its segments, but where this is not possible the segments must be removed and brought to the machine and in that case they are bolted to the face of a disk 1 to be ground. The shaft is mounted in suitable bearings 4 supported by a frame 5 which is bolted to a bed 6, and any suitable means may be provided for rotating said shaft,

such as a pulley 7. The bed 6 is not rectangular as usual, but is offset at one end as at 6,-and this ofl'set portion carries a second frame 15 which is much like the first exceptmg that it has an adjustable and movable carriage, the carriage in turn having bearings 14 in which is j'ournaled a shaft 13 carrying at its front end an emery wheel 11 secured thereto in any suitable manner as by washers 12 clamped under the nut 18. This shaft 13 also may be driven by any suitable means, but I have shown it as provided with a pulley 17, and the two pulleys are indicated in Fig. 3 as rotating in the same direction.

The carriage carrying the emery wheel and its shaft is made in two parts or members respectively adjustable upon each other and upon the frame 15 in two direction, at right angles to each other so as to permit the setting of the emery wheel with respect to the work to be ground in a manner to be described below. One means for carrying out this idea is to construct said frame and its carriage as follows: The frame 15 carries parallel tracks 20 across its upper end, on which slide flat shoes 21 having hook-shaped flanges 22 engaging under said tracks, and the shoes are connected at each end by cross strips 23 rabbeted into the shoes as at 24 so that a lower carriage member is built up which is formed in the shape of a square frame'in whose opening stands the pulley 17 and downward through which may pass the belt leading therefrom. The upper member of this carriage consists of two shoes 31 also parallel with each other but disposed at right angles to the length of the shoes 21 so as to overlie the cross strips 23 which serve as their tracks, and the extremities of said shoes'31 arecliniiedld by cross strips 33 which serve as supports for the bearings 14 and which make up another rectangular structure constituting the uppenmember of the carriage but which is by. preference a little longer parallel with the shaft 13 than it is wide. The inner edges of the shoes 31 are beveled as at 32 and slidably engage the beveled ends of blocks 34 which urclsecured upon the shoes 21, their beveled ends thereby serving as guides for the beveled edges 32 of the shoes 31, and the upper face of the cross strips 23 serving as tracks for said shoes. By this construction the upper member of the carriage iSpermit- 1 'ted'to moveat right angles to the direction in whichthe lower member thereof-moves over the frame 15, andboth members being of op'enwork.structure offer'no obstruction to the presence of the pulley 17 and themeans 1 for driving it.

."Depen'ding from what. mi ght be called the f l v u outer end of the upper carriage member tween two'collars- 42 made fast on a screw member. 2 laterally adjusted to suit the size of the albracket having an'eye i1 swiveled be- 43. which is threaded through an opening 44: in one of the shoes 21, and has a hand i 4 wheel at its outer extremity; and by fadj'ustin'g the latter it will be clear that the upper carriage member can be moved in ward and'outward over the lower carriage As the entire carriage wlll be wheel M whose segments are being ground or the size of the disk lcarrying said segments, no meansfor adjusting it by hand are necessary. However, I prefer to employ-setscrews 47 passing downward throughthe blocks 34 and the shoes 21 beneath them,

and threadedthrough one or both, and bearing at their lower ends upon the tracks 20,

so" that after the entire carriage has been adjusted to the right ,or left as seen in Fig.

4, these screws maybe'set up to hold itin.

position. Finally, it is possible to employ set screws 47 passing through slots 48 in the bearings 1a. in .which'the emery-shaft is mounted. as best seen inFig. 2, so that thisshaft may be adjusted if necessary to .keep the face of the einery wheel in a plane truly parallel with the face of the work to be ground. .These three adjustment-s will be sufficient in this machine, if we except "the possible use of ad ustable means for securing the segments S to the disk 1 by the bolts 2.

In the operation of this machine, the segments S to be ground are bolted as at 2to the faceof the disk 1 or the entire wheel M with itsse'gments in place is appl ed to the shaft 3 by means of the .nut 8 or otherwise,

- the entire carriage being at this time moved to the right in Fig.,& or toward the bot-tom of Fig. 2 so that the'emery wheel 11 will occupy the position indicated in dotted lines .in the last-named View. After the segments i are all in placethe lower carriage-member.

- thewheel or disk carrying the segments S rotate'in the same direction as the arrows indicate in Fig.4 and th eir lapping ar .tions therefore rotate inopposite directions.

Thenpper carriage-member is then adj 'vanced over the lower by manipulating the.

hand wheel 45, and this brings the face of theemery wheel 11 into contact with. the ""ments, lightly at first and later with id accurately and evenly." Attention is t-irted to the fact that any given point on iace of the emery wheel passes over the face of the segments being ground at vari-' able speeds and in different directions. 1* or instance,. take the point. X in' Fig. 4. As this point passes onto the face of the segments at Y alongt-he dotted line, itis mover force so that said segments are ing in a path practicallwat right angles'to that in which the periphery of thedisk 1 or wheel M is moving, and this point X being near tle peri'phery of the emery wheelis moving faster than any other point nearer its axis. As it passes farther inwardtoward the axis of the disk 1 itcrosses a path on the latter which moves slower, and then "another path moi' ing.

slower, and another, and so on. Finally, at a point in llne between "the two'axes the point X is rising vert cally whereas the moving vertically downward; beyond which 1111101 end of the segment being'ground is as the pointhscends it moves again radially outward. over the disk 1 and finally leaves its periphery. The same course at different speeds is followed by other points on the face of the emery wheel, all of which, however, cross the face of the segments already crossed by the point X but at different speeds; and I have found from experimentthat the result is that'the face of the seg--' ment is ground much more rapidly than otherwise, the emery wheel may be said to be self-sharpening, and its face does not become glazed. But perhaps most important of all, there is no tendency for the wear on the face of the emery wheel to dish it, to

render it convex, or to scratch it or groove 'it as usual.- It is possible that the entire carriage may be adjusted on the tracks of project beyond the inner extremities of the segments S, but it should never be set so that it does not 'extendpt least as far as do said sections. In a mill employing many --of the wheels M itisquite possibleto use one of. these grinding wheels almost con tinuously adjusting the carriage on the frame 15 to the proper point and setting it there, and usinga disk 1 corresponding in sizewith the wheels M so that one by one the-latter may be stripped of their segment-s S and the samebrought to and attached the frame 15 so that the emery wheel will upon the disk and gro und. Or if itbe 05,. I

sible' it may be quicker to bring the entire wheelM to the grinding machine, which dispenses: with the necessity for the disk 1 and bolts v ."Theparts ofthi's'machine will of'cours e aloe proportioned as the necessities of the case H M-M t hm. with a fran'ie, a shaft journaled therein,

and means for detachably connecting to said i iM-lt! l cond frame out of alinement with the *"riag'e laterally and longitudinally late on this frame, a shaft journaled car iage, a grindingwheel carried id of shaft, means for rotating afts in the same direction, hnd means mars; y adjusting the carriage to set lac grinding wheel into contact face of the work or to move said 7 y out of register with each other. is grinding machine, the'combina- "iii a frame, a shaft journaled therein, .s for detachably connecting to i the work whose face is to' be of a second frame out of alinement wni: the lift-it, a carriage made in two parts the lowermost of which is laterally adjustahic on this frame and the uppermost of which is longitudinally adjustable on the t journaled in the uppermost grinding wheel carried by the end shaft, means for rotating both shafts ug the upper partof the carto set the face of the grinding wheel contact with the face of the work.

a grinding machine, the combinaa frame, a shaft journaled therein, on the shaft, and means for detachbe ground; of a second frame out nunt with the first, a carriage made parts the lowermost of which is latad ustable on this frame and the up- :--i of which is longitudinally adjustitu: first part, a shaft journaled in the rum part, a grinding wheel carried by end of said shaft and of a size to be e ut of register with said disk when "oil of the frame is'adjusted, means adjusting the uppenpart of the to set the face of the grinding wheel out of contact with the face of the a grinding machine, the combinah a frame, a shaft journaled therein, on the shaft, and means for detachminecting to said disk the work whose to be ground; of a second frame out ncut with the first, a carriage latnd longitudinally adjustable on this a shaft journalcd in the carriage, a wheel carried by the end of said of a size to be moved out of regisiti': said disk when the carriage is adt a -vi and means for locking the the work whose face is to be gro'und;.

saute di'rection and means for manu-' sting to said disk the work whose arm both shafts, and means for carrizng'e on its frame after its lateral adjustment'. 4 '5, In a machine for grinding mill-wheel segments, 4 the combination with a disk,

means for rotating it in an upright plane, and means for-attaching to its face the segments to be ground; of a grinding wheel, means for-rotating it in anupriglu' plane, means for adjusting the support for the wheel so that its plane shall be parallel with that of'said disk,'means for revolving the disk and the wheel in the samedirection, and means for causing the former. to lap the latter to a greatenor-less degree and to ear against the face oftheuwork being groun (5.. In a grindingmachine,the'combination with means for rotating the work in an upright plane; of a frame spaced 'from the face ofthe work and offset laterally from its axis and having transverse tracks parallel to said plane, a carriage made in two parts whereof each has the shape of-a rectangular frame, Shoes on the lower'pa'rt engaging said tracks, cross bars connecting the extremities of said shoes and constituting tracks for the upper 'part, shoes on the latter sliding on these tracks and having beveled inner edges, blocks secured upon the shoes of the lower part and having beveled ends engaging said edges, cross strips connecting the extremities of the upper shoes, journal boxes on these strips, a shaft mounted in said boxes, a driving wheel fast on the shaft within the center of said frame-shaped carriage, and a grinding wheel fast on the end of the shaft, all for the purpose set forth.

7. In a grinding machine, the combination with means for rotating the work in an upright plane; of a frame spaced from the face of the work and offset laterally from its axis and having transverse tracks parallel to said plane, a carriage made in two parts whereof each has the shape of :1 rectangular frame, shoes on the lower part engaging said tracks, hook-shaped flanges on said shoes engaging beneath said tracks, cross bars connecting the extremities of said shoes and constituting tracks for the upper. part, shoes on the latter sliding on these tracks and having beveled inner edges, blocks secured upon the shoes of the lower part and having beveled ends engaging said edges, set screws passing through said blocks and lowermost shoes and bearing upon the lowermost tracks, cross strips connecting, the upper shoes, journal boxes on these strips, a shaft mounted in said boxes. a driving wheel fast. on the shaft within the center of said frame-shaped carriage, a bracket carried by the upper part of the frame and having an eye, a screw whose shanktis swivele'd through said eye and whose threads engage a threaded opening in the lower part of the frame, a hand wheel on the outer extremity of said lap partly over of tlie'shaft, all for the purpose set forth.

8. In a grinding machine, the combination Wll'll a'frame, a shaft journaled therein, and. means for detachablyconnecting to sald shaft the work Whose face to be ground; of axsecond frame a carriage thereon, a shaftjonrnaled in the carriage parallel. to said first shaft, a grinding; wheel on the second shaft with its face in a planeparallel with that of the Work, means-for adjusting the carriage to cause the face of the wheel to the face of the work, means bring said faces into contact, and means for rotating the 7 shafts simultaneously in the same direction. 9. In a grinding machine, the combination for adjusting the carriage to with a work carrier,- and means for driving it to rotate the work in a glX'QIl plane; of a 'Wheel having a grinding; face rotating in a plane parallel with that of the Work, means for setting the wheel to lap its face partly over the face of the Work so that the lapping portions shall move in opposite directions, and means for advancing tho'nheel along the line of'its' axis "for the purpose set f'orth.

In testimony whereof I have hereunto setmy hand in presence of two subscribing witnosses. v \VILLIAM VAN NOSTRAXD.

Witnesses:

J. E. LYoN,

. FRED VAN Nos'raaxn.

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