US2435849A - Slide assembly for machine tools - Google Patents

Description

Feb. 1o, 194s.

M. J. scHLlTTERs SLIDE ASSEMBLY FOR MACHINE TooLs Filed June 24, 1944 2 Sheets-Sheet 1 34' Gttorneg M. J. scHLlTTERs SLIDE 4ASSEMBLY FOR MACHINE TOOLS Feb. l0, 1948.

' 1 Filed June 24, 1944' 2 Sheets-'Sheet 2' mmm N ,s om

n /////7///////7/////////////////// mm n w\ Bil Patented Feb. 10, 1948 UNITED STATES SLIDEASVSEMBLY FOR Michael l; Schlitten,

S-fGlaims:

r This invent-ionA relates to'y machines tool slide assemblies;v particularly-screw machine slide yas semblies.

Thel slides of-screw'machinesv are required to==` carry many different types1 offtoolsandto veryy accurately' guide such tools in theirrapproach; toand retraction fromthe work and in their cut-'- tingoperations. Frequently heavy stresses-'areV imposedon saidslidesin thecourse of their travel;

the direction of such-stresses varying considerably i'ndifferent tool` operations;l Consequently such slidesl andv their-guides are: subjectto cone siderable wear and it is necessary from time toy time to compensate for wear tu avoidfrocking orfswaying of the tools" or other deviation-fromm# curate rectilinear travel. It is vtoibe noted inftliisz connection that aslight lateral playm of a slide in its guideways is often considerably multiplied" atthe cutting edgeo theM tool;

Objects ofthe-inventionarerrtomaterially in'- crease'theextent-'of the slidebearing surfaces as compared to prior practice; to adapt such surfaces to adequately resist stresses acting at any angle to slide travel; toI provide -a 'considerably greater range of adjustment for. wear than` has heretofore been available, andstillafford a quite ne adjustment at all times; and to eliminate play inl either or both of twoftransverse directions by' a single adjustment. Y

Thesellandxvarious other objects-- are attained by the constructiony hereinafter described and illustratedzinrthe. accompanying: drawings, where'- in: v

liig. lgisaaftlopA plan view. of the-improvedslide and. its mounting. i

Fig. aside. elevational view'otfthe sam-eg,l

Fig. 3 islia. rear end-viewiof thevslidef-anditsq mountingv f Fig. Iris-1a. cross. section-al view of samej taken on the line-L-A of Fig. 1. Y

Fig. 5 is -a longitudinal sectional view taken on the line 5-5 of Fig. 3, and'showing a fully retracted position of a sliding:wear-compensating crtsseroimemrkrnueh..

Applcati'onJime 24; 1944, Serial` No.. 541,892

said tonfaces; andi planewfacesiiextending trom;

the fafcesgl tri-theV slide bottom an outwardE inclination', th'ef-I-aces t" and i 5Jl thus j ointly being" ing the slideiisapair-oropposed guide rails 6v and:

S21-fully engaging i theeslideefaeesf 3f, partially engaging the faces *andhawing faceslfspaced vfromA 8 formed at their thicker ends with upwardiy'projectingff lugs- Se apertured "toL accommodate studs n; Il) set adjustably' into the@ adjacent" rail" ends...

Said` gibsf may-be considered; as4 adjustable ele;-

ments ofthe raiis, since they are-heldiby the rails;

andt contribute to thefrailf functions'. Ther studs,i l0"rigfy'carly'fcllars"l lforn abutting the lugs miv Sandurther carry-nuts |-2 for'loekingzthe lugs1 againstcolla-rsi` whereby4 any" adllStment is accurately-mairitalned4 The topf l"portionsl"of therails comprise; seating; members4 ii and?y f3a extending the fullrail'y Mfingths-aird outwardiy'iprojectingjtoseat on theupstandingwalls rl and-V Hu voi a channeleshaped" supper-tf" lfiincorporatedi inwthe frame of a screw machinejorother machinetooi'.' The lower por` tion-of-the slide occupies the channelofsaidjsup-v 30: p`ort,; having however "at slightupwardclearance fromY thesupportf Rowsjoheadedi studs |'6 nor? mallyclampthe'railsjiandfacrigidly to thewalls I lfan'd Maf andithe'studireceiving., openings I] of' at least Vone ofitherails; as 6a.. hailingvaslig'ntI as; elongation transverse to. therainwliereby the lat'- `terfrmatybeadjustedslightlyto and from. the s1ide, To facilit'atecsucl'i" adjumentgit is preferred to.

mount a pluralityorstudsl' transversely in ,the

wali H: their'iends.bearingion the railia and;

wepermitting 'its-accurate positioningwhen the studs "i6 have been loosened.

The descnbeamnsnuctiori permits' mainte..

nance of an .accurate guidanceV ofthe slide which. guidance; as heretofore stated',` is vital to its use.

45 When the lateral or vertical play of the slide becomes objectionable, the operator loosens the` lock nut I2 and then forces the gibs 8 inwardly by turning the studs I0 untilsuch play is fullyv eliminated. The very gradual taper of the gibs,` 50 permits an essential nicety of adjustment, affordf ing free travel of the slide but no deviation from a straight line movement. The increased insertion of the gibs takes up any play of the bearing surfaces 3 and 5, the convergency of these faces I5 being such that their engagement by the rail and thefslid'efaces 5 and converginggradually--towardf` 10a` the `lastmerrtivzrned`4` faces from 'end to endof the' rails Fittedibe'tfween and con-forming to thegslidef" faces 5 and rail faces 1 is a pairioftapered gibs:

gib eliminates both vertical and lateral play of the slide, When, by a succession of adjustments, the gibs have been inserted as far as permitted by the collars Il, the studs I are screwed out a proper distance correspondingly retracting the gibs. 'Ihe operator now loosens the clamping studs l 6 and by means of the studs I8 adjusts the rail 6a inwardly until the gibs are fully engaged without applying undue pressure to the slide. The rail having been clamped in this vnew position, the gibs may be again used as before for asuccession of fine adjustments. The available number of repetitive full adjustment strokes of the gibs is thus limited only by the amount of lateralelongation of the apertures l1 and this elongation may be sufficient for the maximum useful life of the slide.

Reference has so far been made only to' wearA occurring between the surfaces 3 and 5 of the slide and the opposing surfaces of the rails and gibs, Wear will also occur between the slide faces 4 and opposing surfaces each jointly formed by a rail and gib. Such wear will not betaken up through inward adjustment of the gibs, but is fully taken up each time the rail lia`v is adjusted inwardly following a retraction of thegibs,

Improvement is made over prior constructions inthe large amount of aggregate wear for which compensation is provided, in the extensivesurfaces on which the wear is distributedand also ilthe ease and aQCUIBCY Whi-chsuch com'- y pensation is made.

.Whairclaimis 1'. In a slide 'assemblyrfor machine tools, the

combination with a,V slide having opposite side faces and formed with recesses extending toward each other from said .side faces, each recess having a top face substantially parallel to the top face of the slide anda bottom face convergent toward said top face, 'of a pair of guide rails for the slide tted in said recesses 'and engaging said top faces of the recesses tozsupport the slide, at least one of said rails having afaee spaced from and gradually converged toward the bottom face ofthe correspondingrecess, such rail comprising a"tapered gib insertedV between and engaging said converged face's'of such rail and the correspond-- ing recess, means connecting the gib to its rail for increasingly inserting the gib between lits rail and the slide to compensate for wear, a support on` which both rails are mounted, meansfor securing' the rails to such support, and 'means for adjusting one ofsaid' rails toward the other rail to an extent materially 'exceeding the wear adjust# ment effected by the gib; f

'2. In a slide assembly for machine tools, Athe combination with a slide having kopposite side faces and formed with recesses extending toward each other from said side faces, each recess having atop face substantially parallel to the top face of the slide and a bottom face convergent toward said top face, of a pair of guide rails for the slide fitted in said recesses and engaging said top faces ofthe recesses to support the slide, at least one of f openings to accommodate the corresponding clamping connections, affording an inward adjustment of such rail materially exceeding the wear adjustment effected by the gib.

' 3. In a slide assembly for machine tools as set forth in claim 2, a plurality of adjustment screws threaded'in said support and terminally bearing on the'rail having oversized openings, to effect an accurate inward adjustment of such rail.

4. InY a slide assembly for machine tools, the combination with a slide and a pair of guide rails between which the slide reeiprocates, a vtapered gib inserted between the slide and one of said rail-s', means connecting such gib to the adjoined rail for increasingly inserting the gib between such rail and the slide to compensate for wear, and means for adjusting one. of said rails toward the other rail to an extent materially exceeding the wear adjustment effected by the gib,

, 5. In a slide assembly for machine tools, the` combination with a slide and a pair of guide rails between which the slide reciprocates, a tapered gib inserted between the slide and one of said rails, means for increasingly inserting the gib between such rail and the slide and holding it se lectively inserted to compensate for Wear, and means for adjusting one of said rails toward the other rail to an extent materially exceeding the wear adjustment effected by the gib.

MICHAEL J SCHLIT'IERS.

REFERENCES CITED The following references are of record in the file of this patent:

y UNITED STATES PATENTS Number Name Date 206,648 Tucker July 30, 1878 555,372 Hall Feb. 25, 1896 999,662 Lane et al Aug. 1, 1911 1,485,016 Cardullo et al. Feb. 26, 1924 1,817,083 Kearney et al Aug. 4, 1931 1,949,854 Hatch May 22, 1934 2,062,991 Gartin Dec. 1, 1936 2,182,019 Eisele Dec, 5, 1939 2,195,841 j Schlitters Apr'. 2, A1940 2,289,874 Curtis July 14, 1942 2,321,741 Flowers June 15, 1943 2,340,450 Bouschor Feb. l, 1944 FOREIGN PATENTS Number Country Date Great Britain Mar. 25, 192e

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