US1626144A

US1626144A - Casting jig

Info

Publication number: US1626144A
Application number: US118792A
Authority: US
Inventors: John I Michaels; Lester R Watkins
Original assignee: Watkins Manufacturing Corp
Current assignee: Watkins Manufacturing Corp
Priority date: 1926-06-26
Filing date: 1926-06-26
Publication date: 1927-04-26
Anticipated expiration: 1944-04-26

Description

Patented Apr. 26, 1927.

initalia uiten stares rarsnr risica..

JOI-XN l. MICHAELS AND LESTER R. WA'ILKNS, OF VCr-IITA, KANSAS, ASSIGNORS T0 TION OF KANSAS.

GF WICHITA, KANSAS, A COREORA- GASTNG JIGr.

Application filed .Tune 2G,

Our invention relates to improvements in jigs for casting metal beaings and has particular reference to a which maj.7 be used to advantage in casting bearings in various articles, but which is designed especially for casting Babbitt bearings in cylinder blocks of internal combustion engines, our purpose being to provid-'e which is simple in construction, relativelyY ,cheap and easjT to manufacture. which is compact andv capable ot' being quickly and ensi-ljT manijfnulated, which is adjustable to accommodate bearings ot different lengths, which includes selt contained means tor securing it in operative position upon an article to be supplied with a bearing, which ot such construction that Babbitt or other metal may be poured therein with facility, and which includes means whereby a minimum amount ot roughness is lett upon a poured hearing to be dressed oil.

Our inventive idea is capable oi' embodiment in differ-ent mechanical structures, certain of which are shown in the accompanying drawings, but it is to be understood that the structures shown are intended merel.;7 as disclosures ot the essential features and novel characteristics of our invention in certain preferred t'orms and that its scope is as defined in the appended claims.

In the drawings, wherein like characters ot reference denote corresponding parts in the different related viewsz- Fig. 1 is an elevation ot one preferred form of our improved jig showing` same mounted in operative position upon a cylinder block; .l

Fig. 2, an elevation at right angles to Fig. 1 with parts of the and the cylinder lolock shown in section;

3, a top plan view of the as seen in Fig. 2;

Fig. et, a transverse section on the line 4-4 ot' Fig. l;

Fig. 5, a view similar to Fig.y 1 showing another preferred form of oury improved Fig. 6,. an elevation at right angles to Fig. 5 with parts of the jig and'cyl'inder block shown in section;

Fig. T, a top plan view ot the jig shownl in Fig. 6;

Fig. 8, an elevation ot the hopper end of the mandrel ot our improved jig; and

Fig. 9, a top plan view ot the mandrel.

'opposite the orifice 20 and 1926. Serial No. 118,792.

Referring to the drawings in detail.I first to Figs. l to 4l, it will be observed that our improved includes essentiallv a mandrel 10 of circular cross section and ot suitable length having a collar l2 secured thereto in any suitable manner at its lower end :trom which projects a handle 12 and at its upperl end vbeing slightly enlarged in diameter throughout a portion oi `ts length. as indicated at 14.

A. band v16 is secured in anv preferred manner around the enlargementla of mandr l 10 and a circumferential portion ot the latter approximating 1200 is cut away asy indicated at 18 to provide, between the mandrel and said band, a segmental orifice 2O through which molten Babbitt or other metal is adapted to be introduced into a cavitv to f produce a` bearing ae will hereinafter appear.v The upper end ot the enlargement le of mandrel l() is inclined downwardly, asindicat-ed at 22, towardsthe orifice S20,- tierebv to provide in conjunction with band 16,

` hopper into which molten Babbitt or other metal is adapted to be poured wherepv yit mayv flow through oriiice 20 into the cavity to be filled to torni a bearing.

For a purpose which will presently appear thel upper face 22 ot enlargement le is inclined atsuch an angle that its lower edge intersects the side wall ot mandrel l0 slightly above the plane or the lower edge of vband 16. u

Extending/from the side of -mandrel 10 below band i6- is an ei'ilargen'ient 24 which may be formed as an integral part ot said mandrel. but which tor convenience in manufacture, pret1H erablj7 is formed citeer as a part ot band 16 or as an elementl apart trom said banc and mandrel as herein shown and secured to the latter in any preferred manner as, tor eX- ample, by means ot screws 26, This enlargement is of a length somewhat greater than the length' ot the longest bearing it is contemplated casting b v means of our and, as shown, it extends one-hall the wajT around mandrel l() and terminates in longitudinallj7 extending flat faces Q8, 28.

Slidably mounted on mandrel l0 below the enlargement 2a is a sleeve 30 provided with a handle 32 and having a semi-circularly shaped upward extension 3a thereon which extension is disposed oppositely with respect to enlargement 9.4L and terminates in longitudinall/` extending flat '

faces

36, 36 which slidably engage the tacos 287 28 of enlargement 247 said sleeve 30 being' argot constantly towards its uppermostI limit of sliding movement on mandrel 10 by an expansion coil spring 38 which surrounds said mandrel between said sleeve i' i the collar 12 and reacts trom the latter against the former.

In the yuse ot our improved jig just described sleeve 30 is moved by means ot handle 32 downwardL on mandrel 10 against the torce ot spring 88 until the lower tace ot band 16 and the upper tace oit the entension 34 are spaced apart a distance somewhat greater than the length of the part in which a bearing' is to be casted. The jigl then is applied to the part--a cylinder block for example-in which a bearing is to be castedby engaging the lower face oil band 16 with one end ot the part 42 that is to receive the bearing and releasing sleeve 30, so that spring 38 may force the upper tace ot extension 34 into engagement with an oppo site end of the part that is to receive the bearing7 the jig thus being clamped and retained in place upon the bearing receiving part by said spring. Usually bolt receiving openings 44 are formed in the bearing receiving part adjacent to the semi-circularly shaped bearing receiving recess 46 therein, and by using the outer tace ot enlargement 24 adjacent to the tlat faces 28, 2S thereot2 as guides the jig may be positioned by means of these holes to dispose the portion ot mandrel 10 between the band 16 and the upper end of extension 34 concentric and spaced with respect to recess 46, it being understood that for a given size ot bearing to he casted mandrel 1() will be ot a diameter somewhat less than the diameter ot the rew cess 46, so that when the fiat faces 2S, 26 are arranged in abutting relation with the outer face of the bearing receiving part to either side ot the recess 46 therein, a semicircularly shaped cavity will remain between said mandrel and the part, said cavity being closed at its lower endbv the upper end ot extension 34, at its sides by the

tacos

28, 28 of enlargement 24, and partially closed at its top by the lower edge ot enlargement 14 and band 16, oriiice 2O thus remaining the sole means whereby molten metal may be introduced into or whereby it may escape trom cavity 46.

With our operatively associated with a. bearing receiving part 42 just described and as clearly shown in Fig. 2, molten Babbitt or other metal is poured into the hopper provided by band 16 and the upper end ot the enlargement 14 of mandrel 10 and allowed to flow through oriiice 26 into the cavity 46 until the latter is completely tilled. After an elapse of suliicient time to permity the metal to harden the sleeve 30 is moved downward on mandrel 10 by means oit handle 32 until the upper end ol extension 34 is spaced somewhat from the lower end of the part 42, it being noted in this connection that when the upper end ot extension 34 has been moved below the lower end oit ei'ilargen'ient 24 the sleeve 30 may be rotated to engage the upper end oit said extension beneath said enlargement whereby the sleeve 30 may be locked against upward movement on mandrel 10. lWhen extension 34 has been disengaged trom enlargement 24 the entire jig' is given an upward movement by means of handle 12 with the result that any surplus metal remainingl in the hopper at the upper end of the mandrel is broken away trom the metal filling cavity 46 at the upper end ot orifice 20, leaving said cavity tilled with an accurately casted bearing having only a. minimum amount of roughness at its upper end to be dressed oit, it having been found in practice that by having the inclined upper face 22 of enlargement 14 intersect the side of mandrel 10 adjacent to orifice 2O slightly above the lower face ot band 16 the surplus metal in the hopper will be broken away trom the bearing` at said point ot intersection rather than within the limits ot the casted bearing.

Obviously our jig as described in the forcis intended only tor casting bearings without end flangesA` but as shown in Figures 5 to 9 elements may be added to said to adapt it for casting bearings either with or without end Ranges. ln other words, the shown in Figures 5 to 9 structurally and in mode ol operation is the same in all essential respects as the shown in Figures 1 to 4, but includes in addition to the parts shown in Figures 1 to 4 a pair ot bands 48, 5 the former embracing band 16 and the latter en'ibracing sleeve 30. Band 16 is provided with an inclined slot 52 which receives a pin 54 projecting from the inner tace o't' band 4S.y so that upon rotation ot said band 48 about band 16 in one direction said band 48 will be moved, as a result of the cam action between said pin and slot connection to the position shown in Figure 6 with its lower edge disposed below the lower edge of band 16. while upon rotation thereof in an opposite direction said band. will be moved to a position with its lower edge flush with the lower edge oit band 16, a handle 56 on said band 46 providing convenient means ot l* manipulating same.

Sleeve 30 is provided with a slot 58 inclined preterably in a direction opposite to slot 52, said slot 58 receiving a pin 60 projecting trom the inner tace ot band 50. so

that upon rotation of said band upon said sleeve in one direction said band will be moved to position as shown in Fig. 6 with its upper edge disposed above the upper edge et extension 34, while upon rotation thereof llG neaegrfri in :an 'opposite direction same will be'moved to a l.position 'with yits f upper# edge iiush with the upper -edgeo'f'said extension 34, said band l50 being Vprovided with a vhandle 62 whereby' itmay"conveniently be so manipulated.

llilhen the "bands L18, 50 ra'reii'noved to the positiousshown in 'Figure G, their lower' and upper ends, respectively, will engage the part Wto be-suppliedwith aliearing, leaving'zalateralspaceor cavity at each end of cavity 46' into which molten metal will flow to produce end "flanges on the castedbearing. Tvllhem on the other hand,'the bands 48, 5C are rmoved to bring their lower and upper faces, respectively,.fiush with Lthe lower and upper faces, :1,'espectively, of band 16 and extensiond lthestructure so 'far as results which may be .obtained 'therefrom Aare concerned .will ybe essentially the same as `the structure shown in'Figures l to 4.

llrom the foregoing description 4considered in connection with theaccompanying drawings it4 is believed' thatV the construction mode of operation and advantages of our improved will be fully understood. lWe

desire "to point out, however, that variouschanges .and desir-.able :additions may be made lin and 4to the structures shown within they-spirit yand scope of our invention as defined `in the appended claims.

.iale- Iclaim il. il bearing casting comprising a imindreliha-ving va/hopper at the upper end thereof terminating in Ian orifice *opening adjacent to the side of said mandrel, and

' means carriedbysaid mandrel yfor cooperation with a bearing receivingmachine partr to produce .a'bearing receiving cavity about a portion of said .mandrel 2. A bearing casting comprising a mandrel having laterally extending surface adjacent to its ripper end for Contact with a machine. part that is adapted to have a bearing casted therein, said mandrel havingl a hopper' at the upper end thereof formed by inclining the upper surface of said mandrel, said hopper terminating in an orifice. opening adjacent to the side of said mandrel, and means carried by said mandrel for cooperation with a bearing` receiving machine part to produce a bearing receiving cavity about a portion of said mandrel, the said inclined upper surface of said mandrel intersecting the side wall thereof above said laterally extending surface whereby surplus metal ren'iaining in said hopper' after a bearing has been casted will be broken off from the bearing upon upward movement of the with respect to the bearing rceciving ma.- chine part outside the defining limits of the bearing.

3. A bearing casting comprising a cylindrical mandrel having a hopper at the upper end thereof terminating in a discharge orifice opening'fadjacent'to'tlie side of said mandrel, a laterally extending surface on said mandrel. adja'centtofits upper end for contact with anendsuirfaceof Aa l'iearing receiving machine part, a member slidable on sa id mandrel having a laterally extending surface for Contact rwith :an opposite end surface of the bearing receiving machine part, means cooperating with the laterally .extending surfaces on said mandrel and said member to provide a bearing receiving cavity .when said ismoun'ted upon "a bearingrecciving machine part, .and n'icans constantly urging said member tov'ardsrthe laterally extending surface on said mandrel. v

4:. A bearing casting comprising a cylindrical n'iandrei having an enlargement at its upper end, a band surroumling said en-Q largement and extending above the upper end thereof to .provide a hopper, va ,portion of said enlargement being cut awayto provide a discharge orifice between saidband f id mandrel.. and means carried'by said l for cooperation with a bearing r ,Y machine part to provide avbearing izecei'i'ing cavity vin communication with said hopper through said orifice.

5. i bearing casting comprising a Vcylindrical mandrel, having a. hopper at vits ripper end terminating in a discharge orifice adjacent rto the side of saidmandrel, a horizontally extending lateral surface on'said mandrelnear-its upperend for Contact with an end surface of a bearing 'receiving machine part, a pair of longitudinally extending lateral surfaces on said mandrel=for contact with other surfaces of a bearing receiving machine part, a member slidable on said n'iandrel having a horizontally disposed lateral surface for contact with the other end surface of a bearing receiving` machine part, and spring means constantly urging said member towar-ds the 'ripper end of said mandrel. i

6. A bearing casting jig comprising a cylindrical mandrel, having a hopper at its upper end terminating in a discharge orifice adjacent to the `side of said mandrel, a horizontally extending lateral surface on said mandrel near its upper end for contact with an end surface of a bearing receiving machine part, a pair of longitudinally eXtend ing lateral surfaces on said mandrel for contact with other surfaces of a bearing receiving machine part, a member slidable on said mandrel having a horizontally disposed ,lateral surface for contact with the other end surface of a bearing receiving machine part, and spring means constantly urging said member towards the upper 'end of said mandrel, said member having longitudinally extending lateral surfaces in sliding engagement with the longitudinally extending lateral surfaces on said mandrel whereby said member normally ,is held against rotation on said mandrel.

7. A bearing casting comprising a cy lindrical mandrel having a hopper at its upper end terminating in a discharge orifice adjacent to the side oli said mandrel, a horizontally extending lateral surface on said mandrel near its upper end for Contact with an end surface of a bearing receiving machine part, an enlargement', on said mandrel having a longitudinally extending surface for Contact with another surface ot a bearing receiving machine part, a member longitudinally movable on said mandrel, and having a horizontally extending lateral surface for contact with the other end surface of a bearing receiving machine part, and means constantly urging said member towards the upper end ot' said mandrel, said member being rotatable whereby its lateral surface may be engaged beneath the lower end or said enlargement.

8. A bearing casting comjn'ising a cylindrical mandrel having an enlargement at its upper end.,l a band surrounding said enlargement and cooperating with the same to provide a hopper having a discharge orifice opening adjacent to the side of the mandrel, a sen'iicircnlarly shaped enlargement on said mandrel below said band, a sleeve slidable on said mandrel below said enlargement, a semieircularly shaped upward extension on said sleeve having surfaces slidably engaging suriaces of said enlargement, a collar on the lower end of said mandrel, and an expansion coil spring disposed between said collar and said sleeve urging the latter constantly towards the upper end oit the mandrel.

9. A bearing casting comprising a mandrel and means carried by said mandrel adjustable whereby bearings may be casted by said with or without end flanges.

l0. A. bearing casting comprising a mandrel having a hopper at the upper end thereo'lz terminating in a discharge orifice adjacent to the side ot said mandrel, a hori zontally extending lateral surface on said mandrel near its upper end. a sleeve longitudinally movable along said mandrel and having a horizontally extending lateral surtace below said first mentioned lateral surface, and a pair or bands one of which surrounds thc part having said first mentioned lateral surface and the other oi' which surrounds said sleeve, said bands being adjustable to dispose their adjacent end surfaces flush with and also inwardly with respect to said iirst mentioned lateral surface and the lateral surface of said sleeve.

ll, A bearing casting comprising a mandrel provided with a hopper at its upper end terminating in a discharge orifice adjacent to the side oit said mandrel, a. band surrounding an upper end portion of said mandrel,y a second band surrounding said first mentioned hand, one of said bands having an inclined slot therein and the other having a pin enger-ed in said slot whereby rotation of the second mentioned band moves samelongitudinally of said rst mentioned band, a sleeve slidable on said mandrel, a band rotatable on said sleeve, a pin and inclined slot connection between said sleeve and said last mentioned band, and means constantly urging said sleeve towards the upper end el' sait mandrel.

In testimony whereof we hereunto aliix our signatures.

JOHN l. MICHAELS. LESTER R. VVATKINS.