US2378212A - Machine construction - Google Patents

Description

June 12, 1945- `J. B. GIERN ET AL MACHINE CONSTRUCTION Filed Jan. ze, 1942 4253 5o 53 se gi/f WML@

Patented `J une 12, 1945 MACHINE CONSTRUCTION James B. kGiern and Anders P. Anholtt; Detroit,`

Mich., assignors vto lGiern and Anholtt Tool Company,

Michigan Detroit, Mich., a corporation No! Application January 26, 1942', Serial No. 428,216

(cl. sos-6) 1o claims.

This invention relates to machines with reciprocating carriages or slides and `in particular to guideway constructions for such carriages.

One object of this invention is vto provide a carriage' or slide guideway construction wherein the carriage is automatically urged against its guideway by resilient devices. 1

Another object is to pnovide a self-'adjusting machine way construction wherein the carriage or vslide reciprocates along guideways 'with iiat' surfaces, the carriage or slide being urged 'constantly into engagement with the guideways by spring urged plungers, these preferablyhavingl rollers for engaging the guideways..

In the drawing: n' Figure 1 is adiagrammaticalside elevation of a machine having reciprocating slides or carriages embodying the self-adjusting guideway construction. according to the present invention; Figure 2y is a topplan view of the left-hand endofFigure1;

' Figure 3 is a vertical cross-section alongthe line3-3 inFigure1;

Figure 4 is a horizontal section along the line 4-4 in Figure 1;

shown in Figure 4. '-f

y General arrangement Y y In general, the invention consists oi' a self-adjusting guideway construction for machines having reciprocating sildes yor carriages. The `bed of 'the machine is provided wtih hardened steelv ways or guide railswith accurately machined side and top sur-faces.. These are engaged yby corre-v spondingly lmachined surfaces upon theybottom and inner` side walls of the carriage or slide, which isprovided with downwardly. extending ilanges along its edges.v Mounted inone of these flanges are hollow plungers having rollers mounted on their outer ends.V These rollers are urged vinto engagement with the'side wall of one ofthe guide rails or ways-by coil springs mountedwith# in the hollow plungers vand seated against plugs held in brackets secured to theA slide or carriage.` In this manner the correspondingvsurfacesof the slide and guideways are urged constantly into chines which have actually been constructed acor carriages and the'rnachine bed; and at th same time to retain high precisioncand accuracy in the operation or the machine. The present p invention has been' foundfinr actual practice to satisfy these conflictingrequirements.A In macording tothe 'present invention, lthe carriages `or slides have operated successfully in auto- '2"5 Figure 5 is a front elevation of the structure sliding engagement with one another so that any wear is automatically taken up. ff

The invention is especially well adapted to the `construction of'machine tools having reciproy planers, and the like, it has been diilicultrto maintain a free sliding engagement betweenthe slides matically taking up wear and preventing inaccuracy of motion between the reciprocating parts.

Detailed construction i l Referring to the drawing'in detail, `Figure l shows a machine I0 having ahollow bed II withv a central well I2 and raised enclv portions I3.

Extending upwardly from the Vtop wall I4 of thek central portions I3 are integral ribs I5 having flat upper surfacesv I6 and anges I1 with abutment surfaces I8 (Fig. 3). The ribsIS are provided with vertical bores I9 for'receiving bolts y the under surface- Y the surfaces I6 and I8 inthe ribs I5. Upper surfaces 25 and the lateral outer surfaces 26 ofthe guide rails 23 'and 24, are accuratelymachined In the right-handrib or Aflange 32 the surfacel 23 does not directly engage the corresponding surface 26. This .engagement is made by rollers 31 mounted on pins 38 secured in transverse bores 39 in hollow plungers 40. The latter are reciprocably mounted in bores 4I. The plungers 49 are provided Lwith end recesses ,42,v for receiving the rollers 39.

The plungersid are also provided with sockets 43 adapted to receive coil springs 44 seated against the walls betweenthe recesses 4I andy sockets 43. The opposite endsof the coil springs 44 engage' the inner ends 45 of plugs 43 slideably mounted in the sockets 43. @The plugs46 are provided with 'heads 41 Ahaving transverse slots 48 adapted to receive the ends`49 of 'T- shaped brackets 5D. The central'portions of the The- The ways 23 and 24 T-shaped brackets 50 are provided with bores 5| aligned with threaded bores 52 engaged by set screws 53 for securing the brackets 50 to the ribs 32. The slides or carriages 30 are provided with the usual flat working surfaces 54 having T-slots 55 therein for receiving hold-down bolts (not shown) by which the Work to be machined is mounted upc-n the'carriages or slide. Qptionally, other tools or attachments may be mountedA on the slides S in the same manner.

Operation In the operation of the invention the slide or carriage 30 is placed in position upon'the: guida rails or ways 23 and 24 andthe retaining strips 36 bolted in lposition to prevent the removal thereof. The plungers 4D are then inserted in the bores 4l and turneduntil the slots it ofthe. plugs 46 are horizontal. The ends 49 of the T- shaped brackets 50 are then inserted in the slots 48'andthe brackets secured tothe rib 32v by the setscreW-s 53.

The slide 30 is reciprocated by any conventional. mechanism (not shoWn)-. As the slide 38 reciprocates its Weight maintains its surfaces. 21 in enl insliding contact during the entiraoperationu themachine as the slides'. reciprocate to. and;

fro. The precision attainable by themachnn is;

thus greatly enhanced by'this. constructiomand.

due to 'ther fact that comparativelylargeqsurilaccs: are in sliding contact, the Wearfon. the surfaces:

is comparatively slight'.

While a specific embodiment ofthe invention.

hasb'een described andillustrated, 'it will be un:-

dei-stood that various modifications may bemade within the scope of the appended claims.Without departing from thespirit of the. invention.

What We claim is:

l. Ina machine construction, a support having a plurality of elongated guides thereon, a. slide. mounted for sliding movement on said guides and having a portion laterally engageable withv one of said guides, spaced anti-friction meansfor urging said slide portion into lateral engagement with said guide, yielding spring means for engaging said' anti-'friction means to place* the same under tension, and an adjusting abutment member spanning pairs of said spaced' anti-friction means and engaging said yielding means to place 'said anti-friction 'means under equal tension.

2. In a machine construction, a supportfl'ia'ving a plurality of elongated guides thereon, 'a slide mounted for slidingmovement on said guides and having a portion laterally engageableI with one of said guides, spaced anti-frictionmeans connected to said slide for urging said' slide portion into lateral engagement with said guide, yielding spring means. for engaging said anti-friction means to place the same under tension, and an adjusting abutment -member: spanning pairs. of said: spaced. anti-friction means and. engaging.

-, said yielding means. to place said anti-friction;

, rotatably mounted in the ends thereofxin. engage-n another laterally engaging portion of said slide-` ing a plurality of 'elongated guides thereon, a slide mounted for sliding movement on said guides and having a portion laterally engageable with one of said guides, spaced anti-friction means connected to said slide engaging another guide laterally on the opposite side from the side of lateral engagement of said first mentioned guide byv-said slide portion, yielding spring means for engaging said anti-friction means to place the same under tension, and a bridge member engaging at its ends with the yielding spring means of certain-.pairs of said anti-friction means.

4. In a machine construction, a support having apluralityofA elongated guides. thereon, a slide 1 mountedfonslidingmovement on said guides and having' a portion laterally engageable with one of said guides, anti-friction plungers connected to Said-Slide. andcngaging the lateral side of another guide opposite to the side of the guide engagedby said slide portion for holding said slide in engagementwith one of said guides, yielding spring means for engaging said anti-friction means to'placethe -Ksame under tension, and an abutment bar adjustablyyfastened to vsaid slide having its ends engaging,v4 certain pairs of said yieldingjV spring means to. place` said anti-friction plungers under equalized pressure:y

f 5. Ina machine constructiom a: 'SuDPQrt having a pair of elongated' guideswith lateral guide surfaces spaced.y at' equalsseparations therea10ne.,.

a.. sudemcunted for sliding movement.- on said guides Vand having a; portion. laterally engaging..` one;of:.said' guide surfaces;- :spaced anti-friction:

means Connected to said-slide and yieldinely'ene gaging another of said guide suraces for yieldnsly; urging seid slide;` portioninto engagement with s;aid.1irst mentioned` euidesurfaces, said amie-friction meanscomprising plurieers mount.-

edin; spaced horesfformed inonenof said laterally` engaging-slide portions; having roller members mentl with .as corresponding: guide. surface-,sand

spring members confined in said. bores. foryield-f" ingly urging said rollers; into engagement. with said guide. f-

6. Inza machine'. construction, a

Slipport v having a pair of elongated guides Withf lateral guide#` for engaging the other lateral guide surface opposite to the first-mentioned lateral 'guide surfacel and coil springs confined in said bores engaging said plungers for urging the laterally engaging portion of said slide and said first guide into engagement.

'7. 'Ina machine construction, a support having a pairl o elongated guides with .lateral guide surfaces spaced at equal separations theres-long, a

slidemountedfor sliding movement on said guidesK and having a portion laterally engaging one of said guide-surfaces, a' series of bores formed in in opposed relation 4to' said 'first-mentioned guide surface, a spacedf yieldnglyeurged plunger L mounted in each bore having: a roller contact memberY thereon yieldingly' engaging. one of said lateral guide surfaces. forurging said slide into engagementwith the other lateral guide surface,"

coilv springsicrmiinedv in. said bores for placing said plungers under: tension,v andan adjusting-f member spanning certain pairs of said spaced bores having the ends thereof in engagement with said coil springs.

8. In a machine construction, a support having a pair of elongated guide members each having an upper guide surface and a lateral guide surface, a slide mounted fo`r sliding movement upon said upper guide surface and havinga portion engageable with one of said lateral guide surfaces, a series of bores formed in the slide in another lateral guide-engaging portion, thereof,

vplunger members located in said spaced bores having rollers on thepends thereof for engaging the other lateral guide surface for urging said first-mentioned slide portion into engagement with said iirst-mentioned lateral guide surface, coil springs confined in said bores for placing said plungers under tension, plunger members engaging the other ends of the coil springs and telescoped with the rst-mentioned plunger member, and an adjusting bar spanning certain parts of said second-mentioned plunger member to maintain the first-mentioned plungers under tension.

9. In a machine construction, a support having a pair of elongated guide members each having an upper guide surface and a lateral guide surface, a slide mounted for sliding movement upon said upper guide surface and having a portion engageable with one of said lateral guide surfaces,

a plurality of spaced yieldingl'y-urged spaced plungers mounted on said slide, rollers carried by each plunger, and yieldingly engaging the other engaging portion, plungers mounted in each of k said bores, rollers carried by each plunger in en'- gagement with the other lateral guide surface, coil springs mounted in recesses in said `plungers, plunger pins extending into-said recess engaging said coil springs for urging said slide portion'into engagement With said first-mentioned lateral guide surface and abutment bars spanning certain pairs of said plunger pins connected to said slide, said abutment bars being provided with projections for reception in depressions in the outer ends of said plunger pins.

JAMES B.' GIERN. ANDERS P. ANHOLTT.

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