US1644057A - Grinding machine - Google Patents

Description

' 1 1,644,057'4 Oct 4, 927 L R. HEIM GRINDING MACHINE Filed Oct. 8. .1921 I5 Sheets-Sheet 1 ll|||| w INVENTOR l ATTORN S 4 Oct '7 l.. R. HEIM GRINDING MACHINE Filed oct. e. 1921 v s sheets-sheet 2 F N wIIIIIT I I I I I I I I I I M INVENToR k l BY 62M ,f1/W17, MWL

d ATToRNEYs oct. 4. 1927. 1,644,057

L. R. HEIM GRINDING MACHINE Filed ocng, 1921 :s sheets-sheet s ew?. MQW

ATTORNEY Patented d. 4, 1927.

UNITED STATES PATENT-OFFICE.

LEWIS n. Harn, or DANBUBY, coNNEcrIcUr, i

cINcINNArI eaaINnnnsl INCORPORATED, or CINCINNATI, oIIIo,

or oHIo.

ASSIGNOB, BY MESNE ASSIGNMENTS, T0 A CORPORATION GRINDING MACHINE.

Application led October 18, 1921. Serial No. 506,222'.

This invention relates to grinding apparatus, and more particularly tol apparatus especially suited to grind cylindrlcal bodies. such as rolls andthe like. One of the objects thereof is to provide a practical apparatus of the above nature characterlzed by eiicient and accurate action. Another object is to provide apparatus of the above nature of simple and yet secure construction in which the parts are readily accessible. Another object is to provide ap ara-tus of the above nature characterized y 1mproved feed of 'the articles to be ground. Another object is to the 4above nature which shall bereadily adaptable to accommodate various sizes and shapes of material, and to meet varying conditions of practical use. Other objects lwill be in part obvious and in part pointed out 2o hereinafter.

The invention accordingly consists in the features of construction, combinations of elements and arrangement of parts which will be exemplified in the structure hereinafter 254 described and the scope of the application of which will be indicated in the following claims. l

In the accompanying drawings in which is shown one of various possible embodiments of this invention,

Figure 1 is a plan View of the same; Figure 2 is a front elevation; and Figure 3 is an end elevation. Similar reference characters refer to simi- `lar parts throughout the several views ofthe drawings.

Referring now to Figure 1 of the drawings, there is shown a frame 10 having mounted thereon a carriage 11 which is ad- 40 .justable transversely of the frame as by means of the bolts 12 and slots 13 by which the carriage is held inposition. Journaled` on this carriage in suitable bearings 14 is a shaft provided with a pulley 15. At the nner end of this shaft is mounted by means of a suitableholder 16 a rin grindingwheel 17 of emery or like material. .v

At the opposite end of the frame 10 is a carriage 18 adjustable longitudinally of the machine b the usual threaded connection controlled y the feed wheel 19. Upon thisy carriage and journaled in the bearings 2() is a shaft having the pulley 21 fixed thereto. .At the inner endof this shaft a holder 22 provide apparatus of for another ring wheel 23 of a. construction 'and composition similar to the wheel 17.

The pulleys 15 and 421 are respectively driven from the pulleys' 24 and 25 upon a drive shaft 26 in the base of 'the machine. It is to be understood that the pulley '17 is driven at such high speed as to give. the peripheral travel of the wheel 17 a rate of several thousand feet per minute. It is also to be understood that the pulley 21 is driven at a much lower speed, perhaps in the general neighborhood of fifty R.- P. M. 0r less, depending upon. the diameter or size of the wheel 23, and so that the latter will perform the functions hereinafter noted.

By referencel to Figure 1 of the drawings 1t will be seen that the shafts are so posiu tioned that the portions of the wheels between the axes of the shafts overlap one another in a radial direction. In other words, the wheels are offset transversely as well as longitudinally, and in this embodiment are operative by way of 'their side faces.

The direction of drive of these wheels is such that the grinding wheel 17 at its point of action travels downwardly and the slow or regulating wheel 23 travels in the opposite direction or upwardly where it contacts 'the work. The drive between the shaft 26 and the wheelv shafts may be obtained by v suitable belts 27 and 28 as indicated in the drawings; spring-pressed rolls 29 .and 30 being utilized to maintain the desired belt pressure and increase the surface of contact between the belts and pulleys.

Intermediate 'the wheels is a work support or carrier 31 on which the rolls rest while subjected to the action of the wheels in their travel up to and awayfrom such point of action. This carrier is clamped as by a pivot bolt 32 within upright slots 33 in a vertically extending supporting device 31. By this mounting it will be seen that an angular adjustment about the pivot bolts 32, as

well as a vertical adjustment, permitted by slot 33, of the carrier or work support may be secured. The vvertically extending support 34 forms a portion of a small superposed lengthwise extending carriage (see also Fig..2) which is mounted by. suitable ways on the'carriage 18 so as to be adjustable with Vrespect thereto .by means of the threaded shaft 36 controlled by the small hand wheel 37. Also as the carriagey 18 is moved by the hand vwheels 19, it moves the up er carriage in like manner.

s best shown in Figure 1 of the drawings, there are provided guides at the entering sidev of the carrier 31 at 38 and 39 (see also Fig. 2). These guides are clamped against the sidesof the carrier by the bolt 32 .and project above its surface to form a trough, the guide 39 resting within the central; recess formed by the grinding wheel 17 as is clearly shown in both Figures 1 and 2; These lguides onto which the work is fed by any suitable means such as an inclined trough, receive the same and guide it right up to the opposed surfaces of the wheels and also guide the rear end of each roll as it enters into the grip of the wheels. As the rolls pass out 4of the grip they are received between a short guide 40 and a long guide 41 clamped upon opposite sides of the carrier as by the screw 42. Theextreme outer end of the guide 41 may be inclined slightly away from the wheel 23 in order to throw the rollsVL away from the downwardly moving portion of the wheel and into any suitable form of discharge chute. This guide 41 at its end toward the front of the machine rests within' the central recess of the annular regulating wheel 23 as is clearly shown in Fig. 1. f

The upper surface of the carrier as sli-own in Figure 3 of the drawings is in this embodiment substantially horizontal, and 'located above the plane of the axes of the two wheels.

In the action of the apparatus, the rolls are fed as above described on' to the carrier at the front side of the machine, that is, between the guides 38 and/139; From this oint they travel in thefdirection indicated y the arrow in Figure'lof the drawings into the grip of the wheels. When they enter the grip, the regulating wheel on account of its slow speed controls their movement, its grip upon the work being much greater than that of the rapidly moving grinding wheel which continually cuts itself clear. The upwardly moving operative surface of the regulating wheel accordingly rotates the roll in the direction indicated thereon in Figure 2 of the drawings and it is held firmly against the carrier and ground by the rapid downwardly moving face of the grinding wheel. Furthermore the contacting sur ace of the regulating wheel has a component, lengthwise of the carrier in the direction toward the rear of the machine and accordingly `there is a carefully governed and properly predetermined rate of feed of the rolls along the carrier. It is to be noted moreover that the active face of the grinding wheel also has a component vin the Adirection of feed of the rolls at its point of contact therewith, and thus has a tendency to aid instead of oppose this feed- .so predetermined that the rolls will be rotated during the grinding action at the speed best calculated to produce unifornrand accurate results. Furthermore, the rate of feed is readily varied to suit the character4 of work to be ground, and other factors, for if the inclination or elevation of the work support is changed, there will be a corresponding variation in the feed rate. variation moreover may be gained without disturbing the rate at which the wheels are driven. .l

When it is desired to change the diameter of work acted upon, the regulating wheel may readily be varied in its .distance from the grinding wheel, and it is to be understood that it is positively held in such changed position with no tendency to follow up any diminution of the diameter of the article during the grinding action. 1When this adjustment is made, the carrierI may be readily moved to occupy a position midway between the active faces of the wheels, and if necessary the distance between the guide plates may be varied by shims or otherwise. By thetransverse adjustment of the grinding wheel, moreover, the amount of overlap of the two wheels may be readily adjusted, and if desired larger or smaller wheels be employed by varying the distance between their axes. The operation of truing up the twheels may be accomplished in the usual manner by runninga double diamond along the path of the work, and any wear or cutting away of the wheels may be compensated for by a suitable adjustment of the carriages 18 and It will thus be seen that all parts ofv the machine are readily accessible and lthat it is readily adaptable to meet all conditions of work and use.

As various possible embodiments might be made of the above invention and as various changes might be made in the embodiment above set forth, it is to be understood that lall matter hereinabove set forth or shown in thel accompanying drawingsis to be interpreted as illustrative and not in a limiting sense.

I claim as my invention 1. vIn a grinding machine, in combination, .a grinding wheel having an annular opera- *tive surface, a regulating wheel having an This lolo

said two wheels with their axes of rotation substantiallyparallel and in a substantially horizontal plane but spaced laterally out of alincment and in such relation that said annular operative surfaces thereof overlap in a radial direction, means including a driven shaft rotatably mounted in said frame and extending in the general direction of the axes of said wheels, said shaft having driving connections for driving said grinding wheel at a relatively high speed and for driving said regulating vwheel at a relatively low speed, whereby said grinding wheel may perform a grinding operation uponwork ini terposed between said wheels and said regulating wh-eel may control the rotation of said interposed work, said'shaft driving said two wheels in the same direction about their respective axes, whereby said overlapping portions of the operative surfaces of said two wheels travel in 'opposite directions, means for moving one of said wheels'substantially lengthwise of its axis of rotation to vary the distance between said overlappin portions of the annular surfaces of the w eels, and a work support extending between said overlapping portions of the annular surfaces of said two wheels and adapted to support work of round section in operative relation to said two wheels.

2. In a grinding machine, in combination, a frame rotatably supporting two substantially parallel shafts extending away from one another and the one displaced laterally from the other7 a grinding wheel having an annular operative surface mounted on the near end of one of said shafts, a regulating wheel having an annular operative surface mounted on the near end of the other ofsaid shafts,whereby the annular operative sur- .faces of said two wheels overlap in a radial direction, a work support for holding work of round section in operative relation to the overlapping portions of said two wheels, means for driving the said shafts in the same direction about their axes so that the overlapping portions thereof travel in opposite directions and at respective speeds such that the grinding wheel'may perform a grinding operation on the work and the regulating wheel control the rotation yof the work during its action kthereon by said grinding wheel, means for moving one of said wheels in a direction substantially lengthwise of its axis to vary the distance between the overlapping portions of s aid annular surfaces and means comprising a carriage movably carried by said frame and substantially alongside of one of said shafts and substantially opposite the.wheel on the other shaft for movably supporting said work support t0 vary its position relative Ito one of said wheels.-

3. In a grinding machine, in combination, a frame rotatably supporting two substantially parallel shafts extending away vfrom one another and the one displaced laterally from the other, one .of said sb afts beingy carried by a slide mounted upon said frame for movement in a general direction in which 'lating surface mounted on the near end of the other said shafts extend, a grinding wheel having an annular operative surface mounted on the near end of one of Saidshafts, a reguwheel having an annular operative of said shafts, whereby the annular operative surfaces of said two wheels overlap in a radial d'rection, a Work support for holding worlrof round section in operative relation to the overlapping portions of said two wheels, means for driving the said shafts in the same direction about their axes so that the overlapping portions thereof travel in opposite directions and at respective speeds such'that the grinding wheel may perform a grinding operation on the work and the regulating wheel control the rotation of the work during its action thereon by said grinding wheel, and a carriage movably mounted upon said slide and extending substantially alongside of the shaft carried by said slidev for supporting said work support.

4. In a grinding machine, in combination, a grinding wheel having an annular operative surface, a regulating wheel having an annular operative surface, means mounting said two wheels with their axes of rotation substantially parallel and in a substantially 'horizontal plane but spaced laterally out of alinement and in such relation that said annular operative, surfaces thereof overlap in a radial direction, means for driving said grinding wheel at a high speed of rotation about its axis, means for driving said regulating wheel at a much lower speed of rotation and in a direction about its axis the same as the direction in which. said grinding Wheel is driven about its axis, means'for adjusting the position of one of said wheels substantially lengthwise of its axis of rotation tovary the'distance between said.overlapping portions of said annular surfaces jo'f the wheels, means lfor adjfting the position of'oneof .said wheels'substantially transversely of "its axis of rotation to vary the amount ofsaid overlap, a substantially horizontal work support extending between said overlapping portions of said annular surfaces adapted .to support' work of general cylindrical shape' to be acted upon by bothv said grinding -wheel and said regulating wheel, said work support projecting at each end beyond said annular surfaces of the wheels, and guides secured to the sides of each of said projecting ends of said pro-- jecting ends of said work support adapted to hold the work thereon away from contact'with the central portions of the faces of said wheels interior of said annular operating faces thereof, said inner portions of loo lll)

the wheel faces beingrecessed to accommodate said guides.

5. In a grinding machine, in combination,

a grinding wheel having an annular operative surface, a regulatmg'wheel having an annular operative surface, means mounting said two Wheels with their axes of rotation substantially parallel and in a substantially horizontal plane but spaced laterally out of alinement and in such relation that said annular operative surfaces thereof overlap in a radial direction, means for driving said grinding wheel at a high speed of rotation about its axis, means for driving said regulating wheel at a much lower speed of rotation and in a direction about its axis the same as the direction in which said grinding Wheel is driven about its axis, means for' adjusting the position of one of said wheels substantially lengthwise of its axis of lrotation to vary the distance between said overlapping portions of said annular surfaces of the wheels, means for adjusting the position of one of said wheels substantially transversely of its axis of rotation to vary the amount of said overlap, a substantially horizontal Work support extending between said overlapping portions'of said annular surfaces adapted to support work of general cylindrical Shape to be acted upon by both said grinding wheel and said regulating wheel, means for adjusting the position of said work support in a direction substantially parallel to 'the axes of rotation of said Wheels to center said Work support inthe space between said overlapping portions of the wheels, and means for adjustably tilting said Work support for adjustably inclining the path of travel of the work thereon with respect to the operating surfaces of the Wheels. l

In testimony whereof, I have signed my name to this specification this 26th day of 1 LEWIS R, HEIM.

p September, 1921.

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