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Publication numberUS1588739 A
Publication typeGrant
Publication dateJun 15, 1926
Filing dateJan 9, 1922
Priority dateJan 9, 1922
Publication numberUS 1588739 A, US 1588739A, US-A-1588739, US1588739 A, US1588739A
InventorsJohnson Charles E
Original AssigneeJohnson Charles E
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Automatic piston-ring-grinding machine
US 1588739 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

June 15 192s. 1,588,739

c. E. JOHNSON AUTOMATIC PISTON RING GRINDP F MACHINE Filed Jan. 9. 1922 '7 Sheets-Sheet 1 GharlesiQMhmmg flfjorneg J1me N5 E. JOiiNSCbN AUTOMATIC PISTON RING. GRINDING MACHINE 1 Filed. Jan. 9 1922 v SheetsSheet 2 'Inuenior I GhartesEJohnsou Worm June 15 ,1926. I 1,588,739

.6. E. JOHNSON AUTOMATIC PISTON RING GRINDENG MACHINE Filed Jan. 9. 1922 7 Sheets-Sheet S 1W Y 14 s w w 5 g i" "i Q43 12 x 22 11 7 0 i: M 2,. 25 7 ////z// GlmrlesEJohnson (-lmarneg Julie 15 1 926.

AUTOMATIC PISTON RING GRINDING MACHINE Filed Jan, 9. 1922 '7 sheets sha'afl 4 irmm c GhdrlesBJohngon,


Filed Jan. 9. 1922 '7 Sheets-Sheet 5 Inuenfor GharlesBJohnson Fa) filmmy June 15 1926.

C. E. JOHNSON AUTOMATIC PISTON RING GRINDING MACHINE Filed Jan. 9. 1922 '7 Sheets-Sheet 6 Inuenfor (lhmglesfldohnson Worm June 15 1926. 1,588,739.

- c. E. JOHNSON AUTOMATIC PISTON RING GRINDING MACHINE Filed Jan. 9, 1922 v 7 s s 7 75 84- 719 v I 76 79 7? Q a I so 7 ,74 75 z I 57 7/ L V 1 32 6/ l 460* A 59 /1 fi l I v Q; ill. :li I A 5 t. M

mm; Char \caBJohnson 5 omeg UNITED STATES ATENT QFFICE.



Appiiratnm fileddenuery 9. 1922. $eriel I-l'o. 52mins.

This invention relates to a machine for finish grinding iston ring castings at the ends thereof, this being one of the opemtions necessary to convert ring castings into finished piston rings. Prior to the finishing grinding of the castings at their ends, it is usual to rough grind the same to approximate form, with arremoval of the scaleand portions of the metal under the some, heavy -and relatively coarse grinding Wheels being used such operation. This, however, can.

not bring the casting at its ends to finished form with the thickness of the ring brought to, proper limits of tolerance, and the final finishing grinding operation is necessary. The present invention is concerned with a, machine in which the ring castings after the first rough grinding operation may he placed, and the some finlsh ground, the machine being dcsigncd for antonmticwvorking, that is, the machine is kept supplied with a (l uantity of the rough ground rings,

iich they are taken 'and ground and thereafter dropped or eject ed from the machine, finish ground at one end, being later finish ground at the other cndinolike machine, orthe same machine adjusted slightly difi'erently. This invcn- 13101 has. for I its object and purpose, pri nia'eiiy}, the provision of a machine by means of which. the "nhovedeiincd ends may he attained eiiicicntly and in av practical and satisfactory innnncr, large quantity production being had, with an elimination of skilled labor for the finish grinding operation, winch has been. r c-scary heretofore. Sub

sidiary to this pr; other objects end k with the attainment simple manner and mechanism which is possible to get out effective in ever crosses lie-Vin to do with the provision of positive, practically im ofxorr'ier, durable and Way. All of these, together with. many novel constructions per" mitting and providing for the some, will appear fully and in detail as understanding of the invention is had from the following description, taken in connection with the occompanying drawings, in which,

Fig. 1 is a side elevation of a machine made in accordance with my invention.

Fig. 2-is a front elevation of the machine, with parts in vertical close the construction.

one at a time nitrite oi? y purpose, are several the ends noted 'in o- .grinding' Wheel section to better dis Fig. 3- is e tronsverse vertical section I through theinaohine substantially. directly below the grinding wheel therefor and showing the vertical adjusting means therefor.

Fig. 4 is a. plan View of the B1110 ho per M and the individual ring selector-there mm for carrying the rings to the grinding wheel.

. F jg. 5 is s horizontal section on the'plane. of line 5- -5, of Fig. 3.

1g. 6 is a view similar to Big. 5, the ring 5 hopper and ring selector' being rcmovedjto show the construction under the some.

Fig. 7 is a. horizontal section on theplane. of line 7--7, of F ig. 2.

Fig. 8 is a vertical longitudinal section 7 through the housing for the mechanism for operating the ring selector, said mechanism being shown in elevation.

Fig. 9 is a fragmentary vertical section substantially on the plane of line 9- 9, of 7 side elevationnl view. taken on the plane of line 1212, of

Fig. l

Like reference characters refer to like parts in the different figures of the drawings.

The invention .isadopted to he applied to and need in. conjunction with a. Well knoyvn grinding machine, to inc known as no the Hc'ald grinding machine, though the invention is not to be considered as restricted in use to the one type of machine. Insuclr mochines, the supporting orbody'casting 1 v has ahead 2 silidololv'monnted'thereon for en rcciprocatory movements and at the front: end of the heads grinding wheel 3, partially;- covered by e hood 4 is rotatably mounted. The machine is driven by a belt around pul leys 5. The mechanism for causing the recipromtion of the head 2 and the-rotationxif the grinding wheel is not ontlined, e.s .it'isi old and no part of the present invention.

At the front of the machine below the a relatively large vertically positioned sleeve fi is located andv connected with the body 1 and a second sleeve 7 mounted for tertice-l' adjustment. 'infl-the.

ca l; Era-n1 arms, the in rod 2? an :irvhripsd plate 31 is upper side in the same plan:

upper end sleeve 7 stationary hem'l in chuck 10 is located, a ii at the upper and at i) niountsd in hearings, one ml at It at its lower anal is sleeve 6. At its unpria hmsllc-(l piniiin'i in lkl nininn it? which i'ixeil his short shaft mounted end of siaevs 5, its outer when l? by means of which be turned thrnugh the noteih anal Whi 1h may Latin means i v' denotiiustn iiu' out" sum is S. i 1, ;is, 111m tail and a pninh: area-var, a as. LAP/(ll ailjustinum. =0, 7 at one side is formed with 19 into which the- .Bllill pas 'ig thrnugh the sin- YiltlS ts prevent rntatiY-Li meat at iii i inner sleeve. Tlw lower (:ml of the sleeve 7 is slased by 3 weather with the member Chimeric-(i. i0 iiizzshears. by shown. The hand has ,iteui iing annular Sll es Within 'heu turned mitwarrliy wail $31 is poi-awn lITii v last integrally with ll 2 1- 5 arm 26., (hi 313'; the

i s Fig;

i in the em i A. t

app.- and Z is: an :1 the sippvr i m" fhiz. chunk, .z'an l .r in vim 'inm s curvurl 5 s Tin. plate $33, is

than ih' a l fur a purnnse lutvr apps-1 1 'mtatahiy mounted in a hearing 4-0,

slams fin hon 3'. 22.116 intn Jihe housing at its upper and timing "GCi'lVfZi a dawnwardly extending formed an disk 33 which is vertical shaft 39 h1cli,to-

u intsfixed at ths lower end of a gather with a vertical slss *e 4.1 is yrally 'i ith the housing Thev sh? hrough the sleeve 4&1 antlabove 6 its upper and having a head 42 wins. formed with 2 depending skirt 4:3 t over the upper and at the sleeve 41. Abnve the hszzcl a circular plate 44 is placed and detachably secured thereto by set screws. A thin meta nircular plate 45 is cannvctsd t0 anart ill in s i'ng'; s

" the, plaa 4.5, circular 0* J size receiving piston plats 4-5 is iocatsd so as y m i the plates 3 and, 32 and pper sills of the magnetic chunk 10, as best qllOWl'l in Fig.

The disk is await-mated with a plurality of equaliy spacei'l radial slots 47. Parallel- .ing the shaft 39 is vertical shaft 48 nountad in a blaring 49 and in the shaft two triangular plates 5% and are secure one Over the other between which, at the cmners ar-s slvsvss mount-(x1 (in rods 53 which. Wm ct the triangular plates at their earners s Fig. 7). This construction is located that on roiatian of shaft i8, the sleeves brought to and enter the slots 47 in (lili 1 in practice there are six of the sluts 4 an? :1 him number of openings in the it air piste which asts as a "-0- lectnr plate :arry the ring castings lf'dlchlually in i in clinch i5. Shaft 48 at upper :ml is rguippr l u'itl': Worm wheel in. mesh with "which a warm fixnd on tha curl of a sh: i. 56 which enters the housing Iii) at ans 7 l" i from said housing: in the rear uu'l lmusing 57 (iii-2111i '"x i in the hwly the resipiuuztin haul umuntsi" 'llui shaft 1' come i l .o musing 57 at t is" which is (anti 'taiiis manner 0x ippnisiis side clutch ats i4: and. at equally spaced around the shaft between the disk and sleeve the tendency of which is to move the sleeve so that its clutch teeth 61 shall engage with the clutch member 59 to drive shaft 56 from shaft 58. y y

A guide block 67 is secured to thetinner side of the housing vertically above the disk and sleeve in which two rods 68 and 69 are slidably mounted for vertical movements, both being normally pressed downwardlyby' springs 70. Each at its upper end is formed with a head 71 having conical upper sides below which is a groove 2 around each rod. Rod 68 at its lower end is pointed so as to readily enter the notch 65, and the lower end oi rod 69 is reduced in diameter and adapted to enter the groove 63 in the sleeve 60, as shown in Figs. 8 and 11.

Above the guide block 67 a trip block 73 is secured, having two oppositely inclined lower sides 74-. A bar 7 5 is slidably mounted the rods 68 and 69. The latch bars are normally impelled inwardly so as to .enter the grooves when brought thereto by springs 79 attached to member 76 and bearing against the latch bars. Each bar on its inner side is formed with a saw-tooth projection 80',

adapted on the upward movement of the bar 75 with its attached member 76 and latch bars, to ride against the inclined under sides '74 of the trip block 73, thereby impelling the latch bars outwardly to disconnect the same from the heads 71. A coiled spring under tension is connected at its upper end to the member 7 6, and at its lower end tothe guide block 67, this spring 81. normally tending to draw the member 76 and bar 7 5 into lower position as shown in Fig. 8, and thereby insure connection of the latch bars 77 with the heads 71.

The upper end of bar 7 5 has pivotal connection to one arm 83 of a bell crank lever pivotally mounted at 84 to the side of the ody 1 of the machine, the other arm 85 of' the lever extending upwardly into the path of movement of a trip member 86 adjustably mounted in a horizontal guide 87 on the re ciprocuting head 2. On the rearward movement of the head, the arm 85 is struck by trip member 8d with the result that the bar 75 and attached mechanism is elevated, the latch bars 77, in engagement with the heads 71, as shown in Fig. 8, lifting both rods 68 and 69. The "elevation of the former frees the disk 64. and of the latter disconnects the l e e d t e eof from the s eeve so that bar 96 and the the clutch parts 61 and 59 are immediatel connected together and shaft 56 rotated The continuation of the upward movement brings projections 80 against the inclines 74, thereby disengaging the latch bars from the heads 71 and letting the rods and 69 tall, the lower end of the rod 68 riding over the outer curved surface of disk 64 and the low er .end of rod 69 entering the wider portion of the grooves 63 in sleeve 60. The connection of the clutch parts causes a turning of the sleeve 60 until the cam portion of the sleeve rides against the lower end of rod 69, whereupon the sleeve 69 is automati cally moved to disconnect its clutch part 61 from the other clutchmember 59. As soon as this is accomplished, the notch 65 in disk'64 comes to position to receive the lower pointed end or red 68 which enters the'notch and stops the mechanism froinoverrunning undeumomentum.

Accordingly, it is evident that with each reciprocation of the head 2, there is one com' or immediately after,

plete revolution of the shaft 5.6;1it in turn operating through the mechanism associated therewith to turn shaft 39 and the -seleoter plate 45 attached thereto a part of a revolu-' tion, in the machine illustrated, one sixth of a revolution.

The support for the plate 32 at the upper end of rod 29, has an outwardly extending arm 88' extending beyond the edge of thei plate 45 and a vertical post- 89 issecnred td said arm 88. A member 90jis mounted on the post which passes through a slot 91 in. said member, lar 92 on the post and being secured in any position to which adjusted by a nut 92 threading on to the upper end of the post.

A vertically positioned, trough-shaped ring guide 93 is secured to the end of the member 90 and lies over the selector plate 45 (see Fig. 4). Ears 90 project from the member 90, to which bars 94 are connected, .3, rod 95* passing through the ears and ends of the bars 94 and having nuts 95 on. the ends to securely bind the parts together. A vertical retaining bar 96 is connected to the ends of bars 94 and supported thereby. The

ring castings 97 which are to be ground are placed in superimposed relation between the guide 93.

The magnetic chuck is peridoicaliy ener the member resting on a 001- gized, oncev with each reciprocation of the head 2. A second housing 98 alongside the housing 57 houses switch mechanism for making and breaking an electric circuit for the energizing of the chuck, a switch lever 99 extending upwardly from; within the housing and being moved hack and forth when engaged by dogs 100 'adjustably mounted in the guide 87 on reciprocating head 2. The specific,- construction of the electric circuit and the switch mechanism for controlling 1 same not-shown, 9.5 this turned. its ring receiving openings feature is already old in the Heald machine.

With a construction of machine as described. the operation is as follows: The ring holder or hopper is kept filled wholly or partly with rings which have been rough ground on their ends. and said rings are positioned directly over the selec or plate 45 in a position such that, when the plate it: come under the rings and successively receive and talze the lowermost ring: in the etacl: oi rings from the remaining: rings. After the 5 3 lector plate is moved a step or one sixth. of a revolution, it stops with an opening 4-6 directly under the stack ot' rings. The movement of the selector plate is positive and its stopping at an exact predetermined point is positive. The rings received in the openings 46 are carried over under plate 3'22 to the magnetic chuck (see Fig. 4) and the plate, during: its intervals of stopping has an opening it; directly over the chuck, so that a ring therein if: positioned ventrally oi the chuck when the selector plate stops, The clutch is ener inal and the rin magneti attached. thereto "while the head 2 moves forward to carry the grinding; wheel over the ring, it being evident that the ring is rapidly rotated about its central vertical axis by reason of its attachmentto the chuck which is driven at high speed, and the grinding wheel is likewise rapidly rotated about its central horizontal axis. The upper end face of the. ring is accordingly ground truiy with the passage of the grinding wheel for ward and back thereover. On the substantial completion of the rearward movement. of the head 2, the arm 85 of the hell-crank. lever is operated to make the selector plate turning mechanism effective, whereupon the plate is turned one sixth of a revolution to hrine' the next succeeding ring: into position for grinding, the ring which has been ground pas-:5: 1 from the chuck, which inert durl!l i'-' a movements of the selector plate, usrr the second under plate 31 and eventually dropping: from the. s lector plate when it has passed hy the. end ot' said under plate 31. it :mv hereceivcd in any suitable receptacle. v

The grinding ot the, rings proceeds continuously, one after the other and all that is needed in the Way of labor is for the rings to he placed in the ring holder, this being; done by unskilled labor. The operation is rapid and large quantities of rings may be tiuish ground on one end in short time. It is t'il'WifltlS that the other end may he finish ground in the same manner in a. different machine of like construction, or in the same machine by merely adjusting the ring selector plate and the plates 31 and 32 a little higher, through operation of the setting wheel 17.

The machine is relatively simple, durable,

the ahaolute etoppr 53.1 has oer-n practica a stop. "This el minate: liltJYclH-fillb'i and it. ai operation oi the, machintn actice, the ma no it C merit: I llton rings are hi l"? tities and nun he so made I order to produce and sell them conauurciaily, and the present, machine, 3;; a ti step in eliminating wally s-l-ri finish grinding, and at the same ti greater production per mach w w" sequent loweriinr oi overau I aim h'urthernun'e, every riu our sun! and exactly the some, ations due to the hon introduced in han skilled lalmr. All t to make the imention one it"? zcc it.

I claim: 1. in combination, a '"t ried thereby and .m med vertical axis, a VGl'Liifitl rotatahly shaft, a thin circular plate upper end at the shaft? havii a. I equally spat?" openings ada r' rings cut t through, \l brought in on over th tation of the shaft, a siren a tatahly mounted shaft, a. v-i at taehed to the upper end t;l'=ei'c enga onient with said worl" which said worm secure riodieally rotating said hi n d shaft; a, single complete ria'v hlntion, and :neane fOLlZ driving; the tizist vertical shaft from the second vertical slfaft 2. In combination, a support, a horizontally reciprmahle head mounted at the. upper end of support, a rotatably mounted 125 grinding wheel mounted at the front of the head, an auxiliary support mounted on. the first support for vertical adjustment with respect thereto, means for vertically adjtist- 1 ing the auxiliary support with respect; to

the first Support, a ehuek rotatahly mounted to turn about a vertn'al :lXiS on said auxiliary supportand positioned directly below the grinding wheel, a vertieal shaft rotatahly mounted on the auxiliary sup port, a thln circular plate having ring reeelvmg openings therein secured at the upper eiuLet the shaft and paiising over said chuck to ln'ingwaid openings in sueeession directly ofinthe renter ol'v the ehnek, means to turn the shaft and attaehed plate periodically a part of a revolution. and means to stop the plate 'with an opening therein Over the (.llllt'li.

- 3. In combination, amain support, a

rinding'r wheel mounted. lherenn, an an lliary support adjnstahly inounted (ill the main supportflneans-to adjust the auxiliary support. to dtll'erent positions, a rotataliiy mounted magnetic chin-k earned by the auxiliary' support, adjarent the {grinding wheel ehnek inouuted to turn about a vertiealjaxis' lit-low the grinding wheel, a vertieally mounted shall, a en'eular plate with ring J't'tft'lViltQ openings theretln'ougih attached to the upper end of the shaft and movable over the e |tl(l\', a drive ehat't, mechanism interposed between the drive shaft and said vertieal shaft for .drivin the latter by the former, means normally holding the drive shaft and said lHtA'litllllHlll separated, spring means ton etl'eeting eonneetion of the salne when said holding means is released, nieans actuated by movement of said head for releasing the lmltllllg means, and means for autonm-tieally dim-onneeting the drive shaft llfl it tfi t ld meehanisni after the nua-hanisin has nioyed the plate a predetermined distant-e.

5. ln t'titltliihulltlll with a grinding ma ehine having arhurk to hold rings to in: ground. a vertieaily n'munted shaft, nieanis' l'or periodieallfy turning the .ahaI'tH-a partial revolntioin a-eircular plate lixed at the upper end of the shaft. having a' plurality of rin; reeeiving openings th'erethrongh moving over said ehuele a vertical post, a memher at the upper end thereof located hori Zontall under the plate, an arm extending l'rom said tnelnhnr,.a post attaehed to said arm and eatend vertira'lly above the metnher attaehed tn the pest and located amthe plate, and a vertical bar attached '60 plate. a vertieally positioned trt i'ugh-shapetl r In testimony whereof] atlix my signature; I


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2622375 *Dec 6, 1949Dec 23, 1952Cincinnati Milling Machine CoGrinding machine
US2850850 *Oct 22, 1954Sep 9, 1958Western Electric CoGrinders
US3434244 *Apr 3, 1967Mar 25, 1969Cincinnati Milling Machine CoGrinding machinery for finishing brake discs
US5224304 *Nov 7, 1991Jul 6, 1993Speedfam CorporationAutomated free abrasive machine for one side piece part machining
U.S. Classification451/247, 451/333
International ClassificationB24B7/00, B24B7/16
Cooperative ClassificationB24B7/165
European ClassificationB24B7/16C