US1324124A - Island - Google Patents

Description

C. KNOWLES AND H. U. TANNER.

GRINDING MACHINE.

APPLICATION men MAY 8. 191a.

Patented Dec. 9, 1919.

2 SHEETS-SHEET 1.

MAY 00 3 44401.,

C. KNOWLES A1 0- H. D. TANNER.

GRHVDING MACHINE APPLICATXGN FILED MAY 8. 191a.

Patented Dec. 9,1919.

2 SHEETSSHEET 2.

AMM/Q p at .Jforuthe r I v UNITED STATES PATENT OFFICE.

CARROLL KNOWLES. F CBANSTON. AND HUBER'I. D. TANNER, 0F PROVIDENCE, RHODE ISLAND, ASSIGNORS TO BROWN AND SHARPE MANUFACTURING COMPANY, OF PROVIDENCE, RHODE ISLAND; A GOBIPORATION OF RHODE ISLAND.

GRINDING-MAQHIN Providence, respectively, both in the county I of Providence and State of Rhode Island, have invented certain new and useful Imrovements in Grindino -Machines; and we do hereby declare the following to be a full. clear, and exact descri tion of the invention, such as will enable 0t ers skilled in the art -to which it appertains tomake and use the same.

The invention relates to grinding ma chines which are adapted for grinding cylindrical or tapered work, and more particularly to the means for supporting and driving the grinding wheel of machines of this t v iliegrinding wheels of universal machines of'the'. above type are usuall supupon a head which is carrie' upon 1% wheel slide, and may be adjusted either an larly or both. an larly and longitudijia lyz with relation ereto, the slide being I 'oimtedto move longitudinally upon a swivel .which is adjustablymoiinted on the machine frame. It is one object ofthe resgait!invention to provide a novel belt rive inding wheel of such a machine wmcn w u enable thewheel to be driven -from a pulley mounted in the machine frame,.and preferably at one sideand somemwhat below the wheel head, and which will automatically maintain asubstantially uniform tension on the belt during all move- '1 ments and adjustments of the wheel head. To this end the forward and return runs of the driving belt are passed over guide pulleys arranged to permit the adjustments and movements ofthe wheel head, and one or more of which are so connected with the wheel head that the requisite motion is transmitted to such pulley or pulleys from the head to maintain the normal belt tension whenever the head is moved in making any of the adjustments. for which the machine'is adapted, or in effecting the cross feed of the grinding; wheel slide. This insures the proper action of the belt without requiring special adjustn'ientor manipulation of the belt guiding pulleys, and without the use of spring or weight operatcd takeup pulleys; The belt gu ding pulleys are prefer 8pecification of Letters Patent.

"acco panying drawings Patented Dec. 9, 1919.

Application filed May 8. 1918. Serial No. 233.235.

in adjusted position on the slide. To this end means are provided for securing the wheel head directly upon the slide which will ermit the adjustment of the head both angui nates the platen on which the head has been adjustably mounted in prior machines having the same range of adjustment. The means for time securing the wheel head on the slide preferably consists of a rin surrounding a circular base on the hea and adjustably secured on the slide by clamping devices which clamp both the ring" and the wheel head to the \v el slide. The features of the invention will be readilyderstood from an inspection of the tail on line 5-5, Fig. 2.

The machine shown in the drawings is provided with a reciprocating work table :2.

a' swivel table 4 mounted thereon. and provided with-ways (i on which the head-stock and tail-stock are adjustably mounted. these parts being constructed-and operated in any usual manner.

The grinding wheel 8 is secured on the end of a grinding wheel shaft 10 which is mounted in suitable bearings carried by the grinding wheel head 12. The Theadds pro vided witha cylindrical haseli which rests upon the upper surface of the" grinding wheel slide 16 and is s ured. in osition an the slide icy three clamping devices which arly and longitudinally. This elimiand the following detailed description of the n'iechanism illusembrace the base and are longitudinally adjustable on the slide. As shown, each clamping device comprises a disk 18 arranged to overlie the projecting flange of the base, and a bolt 20, the head of which is arranged to engage. one or the other. of

. the head and rests upon the upper surface of the wheel slide.

The clan'iping bolts 20 pass. through holes in the ring, and the clamping disks 18 rest upon the heads of bearing screws 28 which project above the surface of the ring and are substantially 'in the plane of the flange on the wheel head which is engaged by the disks. This construction is simple and compact, and enables the wheel head to be readily and conveniently adjusted either angularly or longitudinally upon the wheel slideand to be quickly and securely clamped in adjusted position.

The wheel slide is mounted to move longitudinally on'ways formedon the wheel slide base 29, and is actuated by the pinion 31 secured to the upper end of a shaft 33 and engaging a rack on the slide. The shaft 33 is operated through cross feed mechanism which may beof any usual construction. The wheel slide base 29 is mounted for angular adjustment upon the machine frame, and is held in adjusted position by clamping bolts 35, the heads of which engage an angular T-slot 37 formed in the base. i

The grinding wh'eel shaft is driven through a belt .30 which passes over a pulley 32 on the shaft and over a driving pulley 34 which ismounted in the machine frame, and is preferably located at one side and below the grinding wheel head, as shown. The forward and return runs of the belt pass over guide pulleys which are so mounted and arranged with relation to the driving and wheel shaft pulleys that they permit the adjustments and feeding movements of the wheel head. and some or all of which are relatively moved during such adjustments or movements to automat cally maintain the belt tension. These guide pulleys are also preferably arranged to lead the belt to and from the wheel shaft pulley laterally over the wheel head. In the preferred construction shown, the driving pulley is an elon- .lgated pulley or drum along which the belt may move as occasion requires, and the forward run of the belt passes from the driving' pulley up over a guide pulley 36, the

axis of which is at an angle to the axis of erally over the wheel head to a vertical guide pulley 38 which is mounted on thewheel head, and which again changes the plane and direction of travel of the belt. the guide pulley 38 the belt passes over the horizontal driving wheel pulley, and thence to a vertical guide pulley 40 mounted on the head directly below the pulley 38, which acts like the pulley 38 to change the plane and direction of .the return run of the belt. From the pulley 40 the belt passes in a siibstantially horizontal direction laterally over the wheel head to av guide pulley 4:? arranged above the drivingpulley 34, withits axis at an angle to the axis of the driving pulley, so that the plane and direction of travel of the belt'is changed and the belt is directed down about the drivingpulley.

The guide pulleys 36 and 42:are mounted in the pulley brackets 44 and 46, which are pivotally supported in vertical bearilrgsr18 and 50'in a support 52 so that the pulleys may swing to accommodate themselves to variations inthe direction of travel ofathe belt passing .over them. The support. 52 in which the pulley brackets are. mounted is arranged to move longitudinally of the pulley 34: to compensate for variations; in the positions of the guide pulleys 38 and .40 and the wheel shaft pulley 32 incident to adjustments or movements of the wheel head. Asshown, the support'iscarried upon the upper end of a swinging lever 15 1 to which the support is pivotally. connected by a shaft 56 secured in lugs 58 atltheupperx end ofthe lever, and engaging bearing li-i'gs 60 on the support. v

To automatically maintain the belt ten-' 'sion during the movements or adjustments of-the wheel head, the support for the guide pulleys 36 and 4:2 is so connectedwitlrthe head that the requisite movement is imparted to the pulleys from the headwhenever the head is moved oradjusted. .Means is alsopreferably provided. for positivelyj maintaining the guide p lley 42 for the re-; turn run of the'belt. in proper alinement with the belt leadingv from the pulley lf) on the wheel head. As shown, the means: for accomplishing these results comprises a rack bar 62 connected with the pulley support 52 and pulley bracket 46, and engaged by a scg ment (i l secured to the wheel head and'haw ing its pitch surface substantially in line with the surfaces of the guide pulleys 38;

pulleys 39 .and40 are mounted. The rack From - which engages an annular groove in the rod.

The sleeve 76 forms one section of a telescoping shaft, the other section of which consists of arod 80 fitting within the sleeve and having its rear end secured to the pulley bracket 46. By means of the rod 80, sleeve 76 and rack bar 62, the guide pulley 4:2 is

maintained in alinement with the belt leading from the pulley 40, whatever the position of the wheel head.

The connections between the rack bar 62 and the pulley support 52 comprises a sleeve 82 which is connected to'the sleeve 7 6 by a'pivot bolt. 84, and is connected with;

the pulleysupport' 52 by a rod 86. The rear end of the rod is connected with the pulley support by a pivot bolt 88, and the forward' cnd of the rod fits within the sleeve 82 and is connected therewith by an adjusting screw 90.- A hand wheel 92 is secured on the forward end-of the adjusting screw so thatfflier-screw may e conveniently turned .t e gu d to adjust the distance between pulle' s36 and til-and the pulleys 38 and on ,-J t e' wheel head, and thus secure the proper'helt'tension; Thrdugh" he connections described the positively moved'by;,.movement' of thewhee head to maintain'the belttension, The connections betweenjthe rackbar 62 and the pulley s'upsrysez-srs so arranged and proportioned 40 that thei:novemen'ts mparted to the guide pulleys 36 and 42 when; the wheel head is moved or adjusted will cofiipensate for the movement of the guide " p eys 38 and 40, and will also compensate for the variation 45 in the wrap of'the' beltabout the pulleys 38 and 40 incident to such adjustment or movement. I

While it is preferred to employ the specific construction and arrangement of, parts 50. shown and described, particularly in embodying the invention in a universal inding machine similar to that illustra in the drawings, it will be understood that this construction and arrangement is not assemtial to the broader features of the invention,

and maybe varied and modified as found desirable or best. suited to the construction and arrangement of the parts in the machine in which it is to be embodied.

Having explained the nature and object of the invention, and "specifically described one form of mechanism in which it may be em: bodied, what is claimedistl. A grinding machine, having, in. combination, a grinding Wheel head, a Wheel .the head," a wheelsli aauigularly adjustable, a base on. whic justable, a driving pulley xnounted ra ity .ofg'uiding pulleys'irranfed to ,and

shaft having a pulley thereon. mounted in the head, a longitudinally movable wheel slide on which the head is angular-1y adjustable, a driving pulley mounted inthe -machine frame, a driving belt passing over, 76

the driving and wheel shaft pulleys, guide pulleys for the forward and return runs 6f" the belt arranged to permit the adjustment and movement ofthe grinding wheel head, and connections for mov-ingone or more of said guide pulleys from the head to automatically maintain the belt tension whenever the head is moved or adjusted. 2. ,A grinding machine,-having, in combination, a 4 grinding wheel head, a wheel shaft having a pulley thereon mounted in :the head, a longitudinally movable wheel slide on which the head is aiigularly adjustable, a driving pulley mounted to. rotate o'n a fixed axis in the machine frame, a driving beltplrssing over the; driving and wheel shaft pulleys, guide pulleys for tlie sion ,whene'yer the head is moved onged 1 justed. if r 3. A grinding'machine, havin' in' com bination, 'a grinding: wheel h'ea ai wh' shaft having a puIIeHEthereonincunted d e on which wheel slide i si -l ngitudinall movab frame on which the base augulu'lframe, a drivingbelt psB8i1ig'.over-'th in and grinding wheel'pulleys'andthe belt laterall over theQ-hea 105. for 'automatical y operating one or more-of. the pulleys to properly guide the butane 1* to maintain the belt tensionwhene ilf'ifll head is moved or adjusted. I l T 4. A grinding machine, hav-ih ,.in combination, a grinding wheel head, a wheelshaft having a p'iille'y thereon mounted in the head, a longitudinally movable wheel h slide on which the head is ungularly adjustable, a driving pulley n minted in the ma- {15 chine frame, a driving bdlt passing overthe driving and wheel shaft'pulleys, two guide I pulleys on the head back-of the wheel' shaft pulley each arranged to change the'plane? and the direction of travel of the-belt, two guide pulleys at one side of the head over which the belt passes from the pulleys on the head to the driving pulley, and conneetionsbetweenthe latter two guide pulleys and the head through which the pulleys are .moved to maintain the belt tension whenshaft having a pulley thererm mounted in 130 longitudinally ofv the driv ng pulley and connected to be moved by the head to maintain the belt tension whenever the head is moved or adjusted.

(3.. A. grinding 'machiiun having. in eom- 'bination. a grinding wheel head. a wheel shalt having a pulley thereon mounted in the head. a longitudinally movable wheel slide on which thehead is-angularly adjustable, :1 driving pulley mounted in the machine frame, a driving belt passing over the driving and wheel shaft pulleys, two gi'lide. pulleys atone side ot the head arranged with their axes at varying angles to the axis of thedriving.pulley to change the plane and direction of travel of thebelt' leadingfro1n the driving pulley over said pulleys, t.\vo

guide pulleys at the rear of the wheel shaft over which thebeltleads in a substantially hor zontal .direction from the. former guide pulleys and arranged witlrtheir axes substautially normal to the axisof" the wheel shaft pulley to changethe, plane and direction of travel of the belt, andineans-for automatically changing the. relative .positions of the pulleys tomaintain the belt tension' .wheneve1; the head; is; moved or n adjuste-d.

.'. Z. ;'1 L .-grindiiig machine, having, in combinat1on,a grinding wheel head, a wheel shaft having apulley; thereon mounted in'. the head, a longitudinally movable wheel slide on. which the head isangularly adjust-,-

able, a driving pulley mounted inthe machine frame. a driving belt passing over the .driving and wheel shaft pulleys. two guide pulley-"s on the head with their axes substantially normal to the axis of the wheel shaft, a segment having its pitch surface substantially coincident .with the surfaces of the pulleys. a rack bar engaged by the segment, and guide pulleys connected with the rack "bar over which the belt passes from the pulleys on the head to the driving pulley.

8. A grinding machine. having, in combination. a grinding wheel-headm wheel shaft havinga pulley thereon mounted in thehead, a longitmhnally .n'iovable wheel slide on which thehead is angularly adjustal'ile, a

driving pulley mounted in the machine frame, a driving belt passing over the driving and whecl shaft pulleys, tw -guide pullcys on the head the ,axes of which are substantially normal to the axis of the wheel shaft, t\'voguide pulleys over which the belt 'vices for clampin passes from the pulleys on the head to the driving pulley, a support movable longitudinally' of the driving pulley on which the.latmguide pulleys are pivotally supported", and a connection between the head and one of said pulleys for maintaining saidpulley in aliuenient with the belt passing over it,

J. A grinding machine, having, in comb-i nation, a grimlmgwheel; l1ea(l,a wheel shaft having a pulley thereon mounted in the head,

a longitlnlinally moyable wheel- 'slide olr which-the head is angularly -a( ljustable,..- a driving pulley mounted in .the machine; frame, a driving belt passingover the :driv ing and wheel shaft pulleys,:-twofiuidepulleys on the head the axes-of Whic [,fll'G-SlllJ-W stant-ially normal to the axistof'theaihcel-.80

shaft. two guide pulleys over which the hell; passes from the pulleys on the.headstoithe,

driving pulley, a support- Zior saidiplllleys movable longitudinally. of: the ..(lriving.;,pul-

ley, a rack bar connected;to,said supportgand a .seginent sec fred tothe' head-engaging said racltbar'. 4

10. A grinding machine,having;incombination, a. grinding wheel head, .a ie'c l shaft having apullcy the head, a longitudinallyi movable, wheel slide on .which the heattisgangularly;agll lsti able, :1 .driv'ingizpullev mountedlg-nv theyinachine frame, a lrivingbelt.passingove the driving and wheel. shaft. .pulleys, two pulleys on the healhgu id; :pulleysove the belt passes froin said.pulleysjo theid' ing pulley, andaneanslfoe-relati g .pensate" for :theanovement of the, leys on the head and-for the variatiopjlnthe wrap of the belt about saidpulleys.

' 11. Agrindingmachine.having, in, coinhi nat1on,a-wheel shde,:a grindlng-wvheel-hexul. having a cylindr cal .hase- -1'cst1ng -.,-.0n :1,the ,;-106

slide. a grinding. :wheel. shaft, in. theihe'ad, and clamping devices-m'erlyln the .l'iasemnd,

, adjustable longitudmallvgoli'jtlie slide.

' 12. A grinding machine..ha ving; incombi-l.

nati0n,a wheel .slide. a grindingiwheel;hea d.,110

having a cylindrical base restingon-t-he slide, a grinding wheel shaft; in the..hea d..a-1:ing plate surroundi lag. the; bases and, adjustable longit-lulinally of the slide, and clamping dejusted positions 13. A grinding machine.having, m LCOIIIbF nation. a wheel slide, agrimling wheel head having a cylindrical basc'resting onithe slide, T-slots extending;longitudinally of.l20

the slide, a ring plate surromu-lingfthe base, clamp disks .overlying 'the 'li: \sc.,;an d' ring, and clamping bolts passii 1g through the disks and ring and engaging theT.-sl0ts.

CARROLL KNOWLES. HUBERT D. TANNER.

to com; .ude,,.pul-

g the rn g-and base iu,.a,d 116

Images