US945979A - Grinding-machine. - Google Patents

Description

O. H. NORTON, J. O. SPENOE & H. N. UUDWORTH.

GRINDING MACHINE.

APPLICATION FILED JANA, 1909. 9%5 9'79 Patented Jan.11,1910.

4 SHEETSSHEET 1.

O. H. NORTON, J. C. SPENGB (is H. N. CUDWORTH.

' GRINDING MACHINE.

APPLICATION FILED JANA, 1909.

45,979 Patented Jan. 11,1910.

4 SHEETSSHEET 2.

O. H. NORTON, J. U. SPENOE 51: H N. OUDWORTH.

GRINDING MACHINE.

APPLICATION FILED JANA, 1909.

4 SHEETS-SHEET s.

Patented Jan. 11, 1910.

f Win C. H. NORTON, J. G. SPENGE & H. N. UUDWORTH.

GRINDING MACHINE.

APPLICATION FILED JAN. 4, 1909.

Patented Jan. 11, 1910.

m y 1r n 2% W @Y. Q N ya 9 S MW w Ru 2% I? device which will locate the CEARLES NORTON, JOHN C. SPENCE, AND HIRAM 1i. CUDWURTH, 035 WOBCESTER,' LSSACHUSETTS, ASSIGNOBS TO NORTDN GRINDING CQB'IPANY, F YUORCESTER,

MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

GRINDING-MACHXNIE.

Application filed January 4,

ates, all

'Fhis invention While capable of general" use. is particularlyadapted for truing and especially grinding, in large quantities, work of such a character that after it is once centered and a part of the surfaces ground, it has to he rccentered for theoperation on she parts, an important case of which is grinding o1 crank shafts.

' invention of particular utility amen used'in connection with a grinding machine having a grinding Wheel of a chicliness-equol to tie length of the pins to ground on the Sfififl. so that there is no relative longitudinal motion between the work andgrinding wheel during the grinding operation.

'lhe principal objects of the invention are orovide a simple and practicable construction whereoy the work can he gaged up to che grinding Wheel so that any desired nunihe; shafts of "the same dimensions can no ground successively without ncccssitatin any special care to prepare all the centers like, and to provide Mable-locating table in proper position with to the grinding Wheel for grinding on fornily the several pins and hearings; also to provide improvements tnres of construction as will appear hereinafter.

Sonic features illustrated herein are cl-iined broadly in our companion applica- 7 Dec. 28. 1908, *Seial lvos. 69,5i7

ore is side view of grinding ma- 2- inc leaving a practicable form of the presil invention applied thereto. Fig. 2 is a pier. of a portion of the same partly in n enlarged scale showing a crank l therein and in position for grindis a side elevation of the gage showing tin carriage or table is a plan oi the some.

Specification of Letters Patent. Paigntgfi 531.31 i1, 191),

1902. Serial No. (70,593.

4- is an end W of the some. 5 sectional view on the line 5--5 of Fig. showing another feature. Fig, (3 's a front of a center block employed. Fig. 7 i sectional view inrough portion of the bed showing a table locating device. Fig. 8 a plan oi the same Figs. 9 10 and 11 are diagrammatic views showing the steps taken in grinding a crank shaft such as is shown in Fig, 2, Figs. 12 to 17 are similar views of another shaft. 1

The invention is illustraicd as applied to a grinding machine having a bed 10 and provided with a grinding Wheel 11 adapted to be adjusted to and from the Work by an adjusting device 12. The machine also is shown as having a reversing device 13 and reversing clogs 1 as the inventionis ordinarily aoplied to a machine having reversing devices but vhen employed in the Way hereinafterdescribed for grinding the crank shaft pins, lhcse reversing devices are not The crank shaft to be ground preferably is driven by means of eccentric center blocks 25 each having an opening 26 therein for receiving the end of ihe shaft. These hlocl's are provided with iardened eccentric centers 27 set at a distance from the cenier of the block equal to we oil-set of the ccnteroit' the pins of the ooh-shaft from. the axis of the hearings. it is provided with slots for receiving the bolt 22 and with :1 screw 29 for fastening e it ring 30 on ihefiend or" the shaft to c rely hold the eccentric center thereon.

The head mounted on a head 3:2 which is reciprocahle on a stud 33 mounted in a head-stock, this 1g provided with a key 3% and. the head vsnh a key-way in which the key ts loosely. A stop screw is also shown. in the head. 2-2 is niounted pin 36 capable of block.

stock cefiifir 31 is shown as.

. fixed position on the table, so

c. 1 notch 37 cut out to receive s i. pin is SClGW-iIlllESCl(Cl3t the ant provided with :1 binder that the can h moved up or clown to tighten the head on the stud. ilithin on opening in the the studis :1 spring 39 for normally for-cine the head and head-stock center outwardly.

It will he unclcrstooihof course, that the gee-r 20 is operated in an tlcsirecl or usual Way for the purpose turning the center block and. the WOIlL in order to register the Work with the grinding wheelso that the latter Wl l grind 3p to a ropcr shoulder on the crank shaft; is employed which is capable of receiving the pins or bearings of the crank shaft is aileplecl to abut against: one of the shoul leis thereon so bring the Workup to proper position, the head center 31 yielding LG pei'n'iit this to be done. For this purpose, the table 15 is SllOWl'lfiS provided Wliil supporting lorflcket 4:5 n'lountecl on Ways thereon and adapted to slide back and forth and to he clamped in adjusted position hy n bolt or the like. This bracket is enlargi-zd at the top and has a passage 4:7 therethrough in which is a slitlc s18 held in position by gihs constituting :1 gage member, and pi Withmeans at it" outer end for recei" pins 03 hearings. This me? is, in the lorm shown in the drawings, cons shaped tlep'ression t member. lit will be c mein oer can be movezi howl it the cyiinclri -"il. crank shaft at points between one. 31 or at the sides of said centers. The slate mounted. on, top having longituii-iiiel slots 51 project screws 52 or like so can be adjusted ba ti handle 53 thereon. fore, that the c to receive the hearings of the crank shol when it is cccentricelly centered the supgaorting bracket shafts positionecl by it. l located in the some pr the grinding wheel lit uniformly ground.

Upon grinding the cmanner set forth her-sin although it is (1(l1tll0l6 to adjust 1 back and forth a1 in or hearing has heen finished to hringthe Work into position for grinding the next one, the, points a: which the i ble will be fixed for finding the different pins and he 7 invoriable for a job of crank .i of-the same dimensions. In 0 def to t he advantage of this fact, the table prefeahly is provided with a. li shapctl t t on the skis, which ally in Figs. 9, l0 and 11.

is held. :1 table locating her "1 by means of need bolts -This bar is provided with devices W 110i can be engagt l by means held locating bar is series of notches loosened and the tshz the pin 55 can e t notches. The tahl :is before, it being understood of course, that the bolts 62 normally hold the locating bar moved. along until 1 er another one of the then in position on the table luring (.11 this time.

"(ins oi the several Ways in which a crank shaft such as shown in l ig. 2 can be ground by this machine is illustrated clisgrsmmatic- The rough forging isfirs; provided With the usual countersunk centers at its ends iii'icl'with an orclinary lathe dog and is then machine. The table is at forth until the minding l beck and .lieei gust clears sift. .has etltl in the last v onncl n the pin success" ely .s indicated cse are also i I 2 sheet oi dram;

similar Way, or instance by notches,

in the t 9 up the 1 he oearings. l

of: t s can be done in the same ii achine, or if ed, the shafts can be taken to another mac inc and either ground or turned up at these oints. These operations can be performed if: desired in the manner set forth in our co -pending spi s r (late herewith, Serial Di 0. 4l59,o48. When lxese parts are truecl up the eccentric blocks are opplicoi to the ends. be understood that all the shaits forming part ot a s1 g of the same dimensions, re prepared 5.2: 1113 Way and supplied with n tl binder 66 can be placed in the lication on a reversing device filed on eventhe Web a on t the left of the right-hand hearing ice-ted in Fig. 9.

The locating lJLH. (3 scljustecl along the table until tic lo: '21- comes into note lfcl therein t lo: hair is ti." tied up on th he machine is then ogoerstctl as is -'l )0(i to grind the i i). pin (55 is .rvrlihdrown amt the table n'lOTQtl along ml the pin the notch #52 WJlCll v i bring the crank shaft in proper position for the Wheel to grind the hearing c at the otherend bringing the'two shoulders tl ese bearings at it proper distance 21p i the crank Hll heacim the eccentric center blocks, and they are then taken one by one into the machine for the eriormance of the rest of the operations upon them.

.lteferring now to Fig. 10, a shaft is placed in the machine and centered on onepair of the eccentric centers for the purpose of grindin one of the pins f. As has been stated in the first part of this specification one of the objects of the invention is to do array with the necessity of machining the centers of-the several eccentric blocks with perfect accuracy and uniformity, If these centers are not machined exactly uniformly ii) will be obvious that. the centers are now lost, as the expression is, and consequently the shaft has to be gaged up F or this purpose the binder 38 is loosened and the gage l8 be brought up to the grinding Wheel 11 adjusted until its left hand edge is flush with the left side of the stone. '1 hen the shaft may be adjusted back and forth, head center moving with it, until the J when applied to the bearing o which has been ground will engage the left shoultile: thereof. This being accompli hed the binder 38 is tightened up. will be seen now that any difference between the original centers andthe centers on which the shaf is new mounted will be compensated for ex- I oythe adjustment of the has been made, and that the on now bedrawn back and the pin Withdrawn from notch .1 so as to allow the table to I i 1 move aion, until the om enters notch r82.

ywv o r l n 'llie parts Will then be in the position shown in it except that the will not he position. I Another Way in which this result can be accomplished is as follows: Zlfter the shaft is centered in the eccentric center blocks the pin can be placed in the notch #2 of the locating burn, The required distance from the left-hand shoulder of the bearing 5 to the grinding Wheel can be measured in any ordinary Way in accordance with the dimensions which the shaft is to have, the shaft being moved slightly o'iththe center 31 to bring it into proper-position. Then the 56 binderfltl is tightened and the parts are in the position shown in Fig. 10. The gage is then and Withdrawn so that it can be used for the subsequent shafts. It will be understood, of course, that. this the only operation performed with the parts in exactly the position shown in Fig. 10, but a shaft like that shown on the last sheet being ground, two of the pins will be located in thislway because for example in l4. and 15, two center pins are ground without changing the adjustment by mov ing t table to the points at which the pin nters' the notches l and 6 respectively.

I ow in order to grind the pins he bracket of course remains in. fixed p ge osition shaft which will and the gage is drawn back away from the shaft; The shaft is then turned'over so that the other eccentric block centers are employed and as has been explained above, this disarranges the adjustment because these centers are not carefully made to the same depth as the other centers, nor are they necessarily the same on the several eccentric center blocks. The gage is brought on the bearing 0 and the pin is brought into notch #3, the center 31 having been loosened and adjusted in accordance With the measurement between the gage 48 and the grinding Wheel. Then the pin g of this shaftis ground and those on subsequent shafts are located in the same Way.

I he Way in which the several pairs 01 pins on the lastsheet of drawings are ground will be understood readily from What has been said above, it being clear that the table 10- cati'ng bar will have a number of notches equal to the total number of pins andbear ing. It will be seen of course that when each shaft is ground and replacedby another the proper shoulder on the new shaft we are aware that many modifications mav' be made therein by any person skilled in the art Without departing from the scope of the invention expressed in the claims. There-- fore we do not Wish to be limited to all the details of construction shown, but

i /hat We do claim is 1. in a machine for grinding crank-shafts and the like, the combination of a grinding Wheel, head and foot centers, and a gage having means for receiving the bearings or pins of the crank shaft and registering a shoulder thereof by contact with the grinding Wheel.

In a machine of the class described, the combination of a grinding wheel, a support or bracket, and a gage mounted on said support and adjustable transversely thereon, said gage comprising a member having a depression in the top thereof for receiving a hearing or pm of the crank shaft, and a plate above said member movable arallel with it for engaging the top of the caring or pin. i

3. In a machine of the character described, the combination of a support or bracket, a transversely reciprocable gage member carried thereby having a V-shaped depression in its upper surface for receiving a cylindrical part of the Work to be operated upon, and a plate above said member movable in. the same direction as the gage for engaging the top or the Work.

'means for rotating said center block.

5. In a machine for grinding crank shafts,

the combination of head and foot centers, Wlilll a gage movable toward and from a line connecting said centers and adapted to receive the bearings and pins of a crank shaft when located on'said line or Miset therefrom, and a yielding head stock center.

'6. In a machine of the character described,

the combination of a head stock, arotary face plate thereon, a taper mounted on the headstock and having a key, a hub sltdably mounted on said taper and having a Way for sai 1 key, a head center mounted on said hub, and a spring for yieldingly forcing the hub I and'head center forward. I 7. in a machine of the character described, the combination of a headstock, a taper mounted on the head-stock and having a key, a hub slidably mounted on said taper and having a t ay for said hey, a head center mounted on said hub, a spring for yieldingly forcing-the hub and head center forward, and means on hub for lining the hub with respect to the taper.

' 8. in a machine of the character described, the combination of the head-stock, a taper mounted thereon, a hub slidably mounted on per a head center on the hub, and means on said hub for fixing the hub with respect to the taper to pr vent longitudinal motion oi? the head center. 9, in a machine of the character described, combination. hf, a 'head-stocl-;, a taper thereon, a hub siidabl mounted on the taper, a head center on the hub, a slotted pin passing through the hub and adapted to engage the taper, and means for moving said pin to engage the taper and hold the hub for clamping the pin in bred position.

i In a grinding machine, the

justable thereon, a pin mounted on the bed and movable oward and from the table, and

definite position on the bed.

conibinzo r 1, 1 7 [ion Oi a. oeo, a Work-supportint, table adengine 11. In a grinding machine, the combina- 55 tiorrof a bed, a table adjustable along the bed, a pin supported by the bed and movable toward and from the table, and an adjustable bar on the table having notches therein for receiving the end of the pin, whereby the table may be fixed in an adjusted position on the bed.

12. in a machine of the character described, the combination of a bed,ra table movable along the bed and having a T- shaped slot in the sidethereof, a plate adjustable along said slot and removable from the table and having notches therein at pref determined distances apart, and means supported by said bed for engaging in said notches to fix the table in a definite position on the bed.

13. in a machine of the character described, the combination of a b ed, a table movable along the bed and having a T- shaped slot in the side thereof, a plate adjustable along said slot and removable from the table and having devices thereon at predetermined distances apart, and means supported by said bed for engaging said devices to fix the table in a definite position on the bed. i

14. In a machine of the character described, the combination of a bed, a table movable along the bed, a plate adjsutable along said table and having devices thereon at predetermined distances apart, and means si pported by said bed tor engaging said devices to fix the table in a definite positionv on the bed.

15. In a machine of the character described, the combination of a grinding wheel, a bed, a table movable along said bed, means for locating said table in a plurality of operative positions with relation to said bed and a gage carried by the table for positioning the work with reference to the grinding Wheel.

in testimony whereof we have hereunto set our hands, in the presence of two subscribing witnesses.

CHARLES H. NORTON. JOHh C. SllCI -TCE. IHRAM QWORTH.

Vi 'itncsscs:

ALBERT E. FAY C. Foizansr W BS5011.

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