US1252478A - Worm-grinding machine. - Google Patents

Description

NLE. NOYES. WORM GBINDING MACHINE.

APPLICATION FILED AUG.23, 1916.

Patented Jan. 8, 1918. A 5 SHEETS*SHEET I Cliffoznm) M. E. NOYES. wonmlcnmome MACHINE.

APPLICATION FILED AUG-23. |916.

Patented J an. 8, 1918.

5 SHEETS-SHEET 2.

'-Illl illllllm lIlllllllllllllllllll @vi/ind M. E'. NOYES.

WORM GRINDING MACHINE. APPLICATION FILED AuG.23. 1916.

LQEQA'YS. n PaIenIed Jan. 8,1918.

5 SHEETS-SHEET 3- M. E. `Ilm/fs. WORM GRINDING MACHINE.

APPLICATION FILED AUG.23, I9I6.

1,252,47. Patented Jan. 8,1918.

5 shiny-SHEET 4.

atroznu M. E. NOYES.

WORM GRINDING MACHINE.

APPLICATION FILED Aus.23. I9I6.

Q?? PaIenIed Jan. 8,1918 [Q25] 5 SHEETS-SHEET 5.

Catton/I ma U NrrED sTA'rEs MAYHEW E. NoYEs, or CLEVELAND, omd- Assrenon'ro THE HENDEICKSCN MA'CHNE i COMPANY, or CLEVELAND, oHro, A ConronA'rIoN or omo.

WORM-GEINDING MACHINE.

Application ala August as, 191e. seriaiivo. 116,526.

full, clear, and exact'description of'thesame,

such as will enable othersr skilled in the. art to which it pertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to grinding machines more. particularly of that character adapted to grind the threads of worms or other machine parts having similar threads or teeth, and its object is an automatic machine having a grinding wheel angularly adjustable to accord with the pitch of the thread -to be -ground and movable longitudinally of the Work during the grinding operation at a speedcorresponding to the. speed of revolution of the work wherebyv the grinding wheel is maintained in proper engagement with the thread during the grinding operation, and also having indexing mechanism operable at a time when the grinding wheel is out of engagement with the work, to bring a -succeeding thread of the worm to position to be ground.

The mechanism for rotating the work holder and thus rotate the worm to be ground, and mechanism for operating the grinding wheel carriage, the indexing mechanism, etc., are yidentical with like devices or parts shown in my vPatent No. 1,161,242, of November 23, 1915, and this invention more particularly relates to the grinding wheel head in combination withv such coperative elements in an organized machine of the character stated, and another object of the invention is a grinding machine having the usual liveand dead centers for holding the 'work and means for rotating the same at predetermined speed and a grindingwheel rotatable at a comparatively high rate of speed 4for grinding the thread and adapted to be turned about an axis lying in a hori- Zontal plane cutting the longitudinal axis of the Work at an angle to accord with the pitch of the thread to be ground.

In said Patent No. 161,242, the grinding wheel on being turned atI an angle correspondingto the pitch of the thread to be Specification of Letters Patent. Ptentd 3331.8, 1918,

ground is turned to such position thatthe point of Contact of the wheel with the Work is above orbelow the horizontal-'plane cutting the axis of the Work and,-therefore,a.in-

the device shown in the lsaid patent meansy are provided for' vertically adjusting thee-'- grinding wheel head in order to bring the point of Contact with. the kvork in the horizontal plane. With the device which formsv the subject n'iat'tervofv this invention, the.

grinding wheel on being adjusted about an of the work, the said axis lying in the plane .axis in a horizontal plane cutting the axis of the grinding wheel and cutting theaxis f of rotation thereof at a right angle so lthat at f whatever angle possible. within the 360 .de- Y grees of a circle that thegrinding wheel ,I

may be set, the point ofcontactof thev grinding wheel with the work never varies.'

These and other objects and the. several novel features of the invention in its preferred form are hereinafter more `fully degrinding wheel and operating means there'-A for.

Fig. 4 is a plan view showing thevcarriage scribed and claimed and shown. inthe ac-` i' l on which is mounted the grinding wheell head.

Fig. 5 is a vertical section on an enlarged scale showing the grinding wheel and operating mechanism.

Fig. 6 is a front elevation of thegrinding wheel and supporting means therefor.

Fig. 7 is a detail showing the 'carriagecarrying the grinding wheel.

Fig. 8 is a detail showing a worm and portion of a peculiarly 'shaped grinding f f f wheel in the relativev positions lassumed',`

thereby.` y

Similar characters refer to similar parts throughout the `drawing and specification. j The entire operating mechanism of this invention except the grinding wheel head ris j identical with that described in my former Patent 1,161,242, including the base ,10, main drive shaft 4and clutch mechanism thereon (not here shown), the indexing shaft 13 and gear train connectedtherewith operating the work holder 14 and the gearV train operating the lead screw shaft 51, the

two gear trains having master gears where-- bythe rotation ofthe worlr holderandfof the lead screw for moving the grinding wheel carriageA longitudinally of the work may correspond and the grinding wheel 97 maintained 1n propercontact with the 'thread of the Worm during the grinding nally of the work and the carriage is the 'movement. Likewise, theV mechanism including theshattlSO, the` gear 182 and stops Rilland-"136 etc., for limiting thetravel of the grinding wheel carriage 82 longitudisame-asin the former patent.`

head 200 It is to be understood that these ing wheel'head200 and the support 201for the grinding wheel 97.

parts are in vthe same cooperative relation as described in the said former patent, the

only practical difference being in the grind- Aswill be observed in-Figs. 3, 5, 6 and 7, the head 200 is cylindrical in form and ladapted to receive the/wheel support 201, also cylindrical in-` form and vfitting therel within. vThis base is provided with a remov- Aand rotatable therein. The support is held against rotationv by means of the set screw..

'able lback plate; 202 and is provided at the forward endwith a iiange 203-by means of -which the support is maintained in the head.

204 andthe Harige ot the back plate 202 may be graduated, asv indicated in. Fig. 1 by means jof which the angle 'at wihich theV grinding wheel is ,set may be determined, as

is hereinafter described. The support 201 is provided with a forwardly extending porvtion'205 carrying the. grinding wheel shaft 206, as will be observed in Figs. 3 and 5 and this shaft 206 is rotatable by means of the spuit1 gea-r 207 thereon meshing with a similar spur gear 208 on a parallel shaft 209. 0n the shaft 209 is a bevel gear 210 meshing with a bevel gear 211 on the drive shaft 212, mounted in the support 201, the longitudinal axis ont the shaft 212 coinciding with the axis of the head 200 and support 201. Et' is to be observed that this longitudinal axis lies in a horizontal plane cutting the axis of rotation of the work on the center 213, as is shown in Figs. 2 andrs, and elem-.that this axis cuts through the plane of the wheel and ents the axis of rotation of the grindingn wheel at a right angle thereto. lThus the wheel engages the work in a horizontal plane, cutting the longitudinal .axis thereof 'whether the wheeibe turned to position indicated in Fig. 3 or at anfangle transversely ot the wordt as indicated in Fig.,

l or 2, as may be required ingrinding wormsV of various pitches or similar machine parte, as spiral gears and the like.

As will be understood from perusal of the former patent above-mentioned, the grindn ing wheel moves longitudinally of the work during engagement of the thread or tooth therewith, and on` completing the grinding movement the carriage is moved by' means of the cam 115 to withdraw the Wheel from engagement with the worlnfwhereupon the carriage andthe grinding wheel are moved baci; longitudinally of the work while out of Preferably the grinding wheel is shaped i on the edge to engage adjacent flanks of two threads oi: the worm, the position shown in iiill lines in Fig.y 8 being indicative of the position assumed when out of'engagement therewith during the resetting of the .wheel` and the dotted lines indicating the positionv when in contact with the worm. lt is to be understood, however, that grinding wheels of various shapes may be utilized either for grinding a single iankof a thread or adja# cent flanks, as may be desired. f

in order that the automatic movement of the' grinding wheel head may bring the grinding` wheel intoproper grinding engagement 'with the work, a screw shaft 220 is mounted on the base 89 and engages the threaded boss 221 carried by the plate 86. This shaft is provided with a. bevel gear 222 meshing with asimilar gear 223 on a vertical shaft 224, which shaft is provided with a hand wheel 225 vat the upper end .by means of which it may be rotated. By this arrangement rotation of the shaft 220 slides the base 89 relative to the plate 8 6 to adjust the grinding wheel inthe proper relation to the work. Thus `wear of the grinding wheel'may be compensated foy/:

The sev-eral shafts'of 'the grinding wheel head are provided with the tight and 4loose pulleys 215 and 216.. The gear ratios are such that the grinding wheel may be rotated ata relatively high rate of speed.

. Having thus briefly described my inven-4 tion, its utility, and mode of operatiomwhat l claim and desire to secure by vLetters Patent ot'the United States is- 1. n a' machine for grinding worms, ro-y tatable' work holding means, 'a

'.Ywith the thread, .means for vresetting the -wheelv and the axis of rotation of the work lat a right angle the axis of which cuts the axis of rotation of the grinding Wheel and of the-work at a right angle.

2; In a machine `Jfor grinding threads of -Worms and the like, rotatable work holding means, a grinding wheel movable longitudinally ofthe work during the grinding interval ata speed to maintain the wheel in proper engagement with the thread, means for resetting thegrinding wheel for successive operations, and a rotatably mounted holder for the Wheel, the -axis of which is in a horizontal pla-ne -cutting the axis of rotation of the .work at4 a right angle and passing through the center .of rotation of the grinding wheel.

.3. In a machine* for grinding the threads of worms or'the like, rotatable work holdin means, a rotatable grinding wheel movab e'longitudinally of the work during the operation at a speed adapted to maintain the wheel in proper contact with the thread during theigrinding movement.I means for resetting the grinding wheel for successive operations, and means for indexing the work .during the `resetting interval, the grinding wheel being mounted and adapted to be turned about an axis cutting the axis of rotation of the lgrinding wheel and of the work at a right angle.

4. In a machine for grinding the threads of worms-or the like, means for holding the work, and a rotatable grinding wheel adapted to be turned to an angle corresponding Ywith the pitch or angle of the thread'and movable longitudinally of the work during the grinding operation, the axis about which the wheel may be turned in adjusting being in a horizontal plane cutting the axis of the lwork.

5. InA a machine lof the .character described, a rotatable grinding wheel adapted to, be brought into and out of contact with the work to be ground, and a support for the' wheel rotatable about an axis' cutting the axis of rot-ation ofthe wheel and of the work at a right angle. 6. In a machine of the character described, a rotatable grinding wheel, a suport for the Wheel rotatable about an axis cutting the axis of rotation of the wheel and of the work at a right angle, a mounting for said support; and releasable means for securingthe said supporty against rotation therein, the support and mounting being provided with graduations determining the angle it which the grinding wheel is set.

7. In a machine of the character. described, wm-k holding means adapted-to rotate the work, a rotatable grinding wheel, a support for the wheel rotatable about an axis cutting the axis of rotation of the wheel and of the work at a right angle, a mounting for the.

support, releasable means for securing the support against rotation therein, a drive shaft, the longitudinal axis of which coincides'with the axis ot' rotation of the support, the grinding wheel being in geared relation with the said shaft, a-carriage provided with ways for said mounting, manual means for adjust-ing the mounting .on the carriage toward or from the work to posi-l tion the wheel relative to the work, automatic means for moving thefcarriage toward and from the work to bringlthe wheel into and out of contact therewith, and means for .moving the carriage longitudinally of the Work, said means including a master gear whereby the movement of the carriage land rotation of the worK are so related that the grinding wheel is maintained in desired contact 4with the work during thegrinding op-l eration.

8. In a machine of the character described, rotatablev work holding means, a rotatable grinding wheel, a support for the wheel rotatable about an axis cutting the axis of rotation of the wheel and of the work at a right angle, a mounting for the support, ieleasable means for securing the support against rotation, means Jfor determining the angle at which the grinding wheel may be set, a drive shaft, the longitudinal -axis of which coincides with the axis of rotation of the support, and means operatively connecting the drive shaft and grinding wheel. l

9. In a -worm grinding machine, work holding means` means for rotating the same at a predetermined speed, a rotatable grinding wheel, means whereby the grinding wheel may be turned about an axis cutting the axis ofrotation of the wheel and of the work at aA right angle, a carriage for the -said grinding wheel, automatic means for moving the wheel into engagement with the work, a lead screw in geared relation with the work holding means adapted to move the carriage longitudinally of the work ata speed to maintain thegrinding wheel in proper Contact with the thread to be ground, automatic means for withdrawing the wheel from the engagement with the work, means for resetting the grinding wheel toA original position, and means for driving the grinding wheel.

10. In a machine for grinding the threads of worms. means for holding the work, a grinding ywheel movable longitudinally of the work during .the grinding operation,

'means for rotating the work at a speed to -of Worms; means for hoidinp; h wom, :i re

,1 taiiable grinldiiw wheel, f1 Support therefor .the Support being adapted to be turned about unf' afxis' passing through thepkme, of thewv'heifmidcutting; the axis 0f otzitieii of the iifheel and ef the Work at; fight angie whereby-the'Wi'xee may be set .it :in 'angie to alc-Cordf'vvith the; angle rif-the' threaci to be ground; iziie'wheei being,f movable 0ngitudinaily'oihe work-dwing the, g'iinding @p erzifti'on2 mesme foi' rotating' the Werk et a speed'tU-mainain the' 'hrezid in proper com tact: *icli-"ihel grinding wheel, automatic means 'fdfsetng the grinding" Whee foi' succesie,'opeations and auon'mtie means for lindexing he v'vork during; the resetting inteivaiv. f f' l', -n'a machine for 'grndiiig The threads of Worms, means for holdingr the work, a ro takableighidirig yifheel adapted to be turned abot am q xi'sqassing through The plane of the "Wheel 1an@ cutting the 'axis of mia/donl of the whelizmd 'ofthe Work at :i righi, :1n-

gie, a'uoniatio means for iiio'ving the grind imp; Wheel longitudinally of, the Work dur# i jing' che grindingoperationv means foi :id-

justing ighefgrining wheel-to Upeizie, 0n

Werk of; Vaiions diameters7 ineens for iso- 'iatiiig the Woik at :1 Speed to mainan the thread in proper grinding Contact; ywithV he grinding Wheel during the grinding moveof Worn'is and iii-e' iie, work holding meim,

:iv rentable grinding 'Wheel adapted to be, tuine about en axis passing through lie 'piane (if iie Wiieei' Cutting'the axis of mtatie'n of die wheei of the'work at a iight agie whereby the Wheei may 'be adjusted ziccei'd wih the ange'pf the thread. 'td

be gewild, eutemaigic means 'fr 'moving' the gi-Hiding* Wheel ongitiiflinaliy of' the work hiring the 'grinding operation, means for i'o'taing ille, Woii'k a speed iizo maintain the, grinding Wheel in piopei- Contact Liiereivith hiougjhsut the .grinding movement, said means including va masieijgefirtiie number of teeth of which is, deeiiined by the pitch of he thread to be gefilmd', autematic means 'for resetting the grinding wheel fm? succeslsive'eperations, and autmaiiic vmeansim inlei, .in i machine foi'a gimdmg the threads of worms or the lke, Woik iioidmg means, means for ifoiziimg he -same,' a rotatable grinding wheel for operating; thefeon, saidl whee being adapted to be uined about a, fixed center 137mg ui horizontal 'piane cutting 'the longitudinal axis of the Worbt, and

reezxsubie means er holdingi'iewheel in,

the desiie posiion G'roperating on Ene woii. A A In testiiiieiiy Whereel ii Sign 'thisvspeeb ILS'

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