US2325622A - Buffing machine - Google Patents

Description

- BUFFING ACHIfiE 'Filed' July 5, 1939 Aug. 3, 1943. E. E. MURRAY 5 Shets-Sheet 1 I N VENTOR [ml/[Jr E HUMP/7X Aug. 3, 1943. E. E. MURRAY BUFEING MACHINE Filed July 3, 1939 v 5 Sheets-Sheet 2 2% ml m.

E. E. MURRAY 2,325,622 BUFFING MACHINE Filed July 3, 1939 5 Sheets-Sheet 4 ATTORNEYJ Aug. 3, 1943. E. E. MURRAY BUFFING MACHINE Filed July 3, 1939 5 Sheets-Sheet 5 INVENTOR. BY [PA/[57 5 Mufi/MY.

PatentedAug. 3, i

t F J D E r t a Ernest hi m Anplieationj July iit1939,-Se 'ial'No.282,585 j {This i nventionrelates to a bumngmachine.

a 'bu fiijng 'machine which is cohipact and qonsem This invention relates moreparticularly to-a bufl' ing head adapted for use on ail-automatic) ma Chine wherein Qthelworkj is carried on a straight line f onveye'r o r a conveyerof the dial type. IThe term bufiing is herein used'jinthe'g'eneric ingof fioor space. Ihis object has beenachieved r by arranging th'buflinghead so that itcan'be' 1 mountedfdirectl'y on thefralniepf-the work conveyer where it is outfiof the way' :t i 91 d b 1 Polishing l n Si i a 1 finishing operations whereimthe finishing is acspeciflc characteristics or thelwheel. i

complished by a rotating" wheel regardless of th Ingan automatic fbufhngj niachine where the work is' carried on a conveyer whichpresents'the work to and removes iti'rointhe wheehit isj'essential to obtain thepropenfinish desired thatthejbufiingl wheel be applied to the work with a certainfpredeter'mined fssurewhichisusual1y arriye d. at empirically anclthatfo'r any giventype of work thisp fessure should not ivary. In some nstances the 1 pr sure should A b light; and" othersfheavyl It is an object ofgthis invention fto producea bufling' head whereinthe buffing 1 It is als'o anfobject of this invention to bro} ducej akbufling head and diist'collecting hood a1- rangeinent which is highly e'flieient and-collects substantially all the dustgenerated by the bufling operation regardless of Whether the-hufling wheel iso'f original diameteror worn down to'a substantially sm aller diameter,

A further feature of theinvent ion is that the dust collecti'ngihood is arranged so that none of r its weight is iearried by, the floating bu'mngj wheel wheel can be. applied to thewith either a yerylight onsensitive pressure pr a heavy "presf the rn alchine,will-not varysubstaintially; j t

V sure a'nd whichpres surahuring thefoperation or it e blimrig ma h ne usually of undulating or jHen-Planifcrm s the butrnecessarily has to ride into and out Ofundulationsioirilalleys in the'work. If the-bufling-wheelfis 'mounteiso thatsa oc-nsiderable or 'substantialweight or nass must be raised each time: 11 the im; t evelsfupfwardly out of the valley, or which weight or mass must be lowered as the buff travelsintothe' valley,

obviously the 'inertia' of this ,massfisgoi rigf to createconsiderable variation in the working-pres- 7 sure of'thebuif. It is a" further obj'eqt of :this

invention tofproducea bu'ff which,'aeven though rung' weight is that of the'arm; carrying' ithe xbutfing wheel and the min itselrqvamtionm working o an uneven or undulating-surface w n I liai' essuramay be had by adjusting'the comnreswhich can be easilyadjusted to any position desired? about the surface to be b'ufl'ed' without t rewmg thejcontact portion of the bllmng wheel out of c'ontact "with the work. j This object has an] arcuate ring, the center ofwhich falls'approxi mately'on th center line orthe'hxtilr carrying? the were andapproxiinatelycoincides with the pdint "of colitact of the work. 1 i

f Fixedto ach' side oithe conveyer or sup-porting arm therefor. Thus the dust colieetm ho 0d iri' no wise affects the pressure-with dFigq l is a' vertical section"through the work conveyer showing 'the ibuflin'g head I in elevation and mounted on the frame of the conve'yer,

Fig-J2 is a side elevation of the bufling head and a portion 01f the work conveyer.

'Figi 31s a sectionalong theline 3-4 'of Fig.- 1. .Fig; 4 is a; section along the line 4-4 of Fig. 1.

5 is a section along-the line 5 5 of Fig; 1. .t t Fig. 6 is a top pla' jview showing the s'wival mounting for themotoxx P Fig. '1 is a' front elevation showing in the broken V lines fthe" lateral adjustment of the motor and -bufiing wheel along thesaddle support for "the irhotorl andshowing' in thefull lines the motor, {butting wheel and driving connections reversed on the saddle and positioned along the right harid side offthemou'nting ring. l I Refe'r'r" more particularly to thedrawings therefi Fshown an automatic fbufiing machine "comprising a work q o'nveye i" andf'a' plurality of j bufiing heads. The work f'conveyer comprisesa it frame'jgenerally designatedf l proyidectat each end with aspr ocket 2 about which is driven an o endlessf'chain 53LfflThe chain 3 :has fixetitherleto in properly spaced" relation alplurality of ,Vwork fixturesf d ubonwhich ismounted the work 5. This rom er Work com eyer is s own by way. of liescriptionrather; than limitation.

[carries a shoe Ito 'which 7 is' secured the" lower 'end f 8 of the mounting ring 9. 4 The mounting ring Scan be adjusted along1 the rail 6 hi-looseni n; he ho s and s id i he s me a o izth mails. 1 Theshoes l cambe loosened on therail-li ib'y 'tloosening the bolts: Ill which connect'xthe outerand inner platesll'and 1; respectively o'f' the i 'shoes f Thus loo senem flthe shoes sand associated ring 'cariiadjl ted' along the; rails 16 j and does: not

lower is-irreversible}; I

- The saddle 541 is provided tore .aftzwith the rollers B2iwhich'p1'ovide a: rolling support for l the saddieilion theoutenface o1 thering V opposite sides of therack l'3." 1 i calhcenterdineBoi thewheeligahd directly vover the approximate point of contact'oi the wheel" t with the work. i In other words; the swivel bolt 164 is vertically directly above the geometric center M of ring 9. Thus thep1ate23 and wheel l5 swivel about the same axis. Obviouslytheftum- The-motorsupportiplatewn *istswivelly coii-i nected by bolt 64 to plate 65. Plate 231s provided 1 g with :arcuate' slots 66 concentric with bolt 64 throughiwhich pass the bolts 61'. Thus whenthe nuts on bolts and 61 are loosened platefl can be swivelled in relation to plate 65, thus adjusting'themotor angularly acrossthe ringbar 9 as will beexplainedl below. The nuts on bolt s "64 and 6], of course, after adj istmentare tightened down to hold themotorinplace; .Thevinotor'ill is bolted to the upper leaf "680i. a hinge. The

lower leaf can: the hinge iShxed-to theplate' 2-3.

The hinge leaves 68 aridl 69 are pivotally con! nected by pins'f'lo. The niotor, bufling wheel l 5 and intermediate driving connections can be adadju'stm'ents are shown ln thefdotted nei-Fig; 7:. This adj ustment A is accomplished by; means" p1? a threaded shaft fll journalled in the ends ofthe ternally threaded *lujgHZ fixed to "the underface oftheplate BSQFigqi. By applyinga' hand crank to either squared end 13 for the shaft H g a d turning the same the plate I 65 and supported mechanism which includes the motor support arrn- 21; all the pulleys iarm 'ISand'thebuHing wheel [5, are adjustedt'o theright or toflthe left:

As shown in Figrl, fulllines, the-buffing 1 l5 is'positioned that'ifrotates ihavertical plane and "contactsthe upperJace oi the work 5. In thisposition iti should be noted thatthe area in Fig. 7, or even further downwardlyalong'the ring},obviously'the;spindle l6, spindle and associated mechanism would abut the top of the conveyer frame and prevent this adjustment; To avoid this, plate 23 andeverything supported ing of :plate will turn themotor 28 and wheel I5 andnthe intermediate driving mechanism bee cause all'this driving and driven mechanism is mounted on plate 23;; The wheel l5 can also be positionedto cut acrossthe work from the 0D- posite directionrfrom that shown in the dotted lines, Fig. that is; by swivelling the plate 23 and associated driving mechanism and wheel l5 clockwise from the full line position shown'in Fig. 5. In fact, the wheel l5 can be said to rotate in a plane at right angles to the work Vconveyer 3,

If it is desired to swing the wheelfl5 from the full line position shown in Fig. l to the full line position shown in Fig 7 sojlthat it engages the \right hand face of the worki, the entire assem' ,bly including motor'28, wheel l5, and interme justed back and forthon saddle" 5t: t Two such 7 diate driving belts' and pu1leys,must be reversed in assemblyonplate 65; If it were'attejmpted totadjust themotorfbuffing wheel '15 and inter- I mediate driving mechanism from the full line saddle st hic i's held l in stIohil mdmsu hove; ment and has a screw connection with an inpositionshown inFig 1 to the full line position 1 thereby; 1 as above described, is swivelled 180 aboutpin '64on plate 65 Thisreversing of the of cohtactjor th bllfl jwith the work is app oxi mate-1y on'the' 0 is adjusted to the dotted linefpositionsjhownin Obviously mqvs he wi n Wh n l i i 7 ing mechanisnilf It should rbe noted thatffas the saddleil' rolls along ring a the area of contact of] the bufiing gwheel IS with thework remains sub};

N v e r gs: Iiitisdesiredioh the" blifling wheel, to ,bu fit the side face or work 5, the bufling wh'eel and driving mechanism;

\diate driving connections, movement of the saddle stantia lly at the geometricahcenten of the an: 1

11h other words, adjustment or.,t e;whe 1hl5 and associated em/mg mechanism ,from the posif tionfshown in the fullilines Fig. 1 to that shown" in thedottedflines, is actiomp'lishedmy -asimple shifting of the saddle 54 1 along the ring" support a. no in andwout adjustment whatsoever; of the n it is desired to y have eater 5 cuteness;

i or cross cut the worlgthenthe wheel isadjusted j b ith P s t bnshwn inlthe iun lines, Fi -,5; which is similar to the full lines shown in Fig; 1'; to thezdotted ,lineishowing ini'i g. 5. This ad "justment of the wheel to cross-cutposition is acentire mechanism is preferably accomplished in theiassemblyjof the motor 28, wheel I5 and intermediate {driving mechanism on plate 65. In

all cases where several of these heads are used on a machine theyare preferably divided for right and left hand mounting. Hence, once after the ma chine is assembled it i sjonly occasionally necessary to vary this mounting arrangement, With the motor 28 and wheel I5 reversed-from the position shownin Fig. 1; adjustment of the rjwheel and motor to the full line position shown infFig. 7 isl ireadily jaccomplished"by turning tioned for off-centerline work, that is, the wheel will contact the work'to the right or left hand side ofthe longitudinal center-line of the-work. To compensatefor the wearing down of the bufiing wheel the-arm19 with the bufiing wheel isadjusted downwardly by turning of hand crank 'I'his'is. illustrated in Fig. BHWhereintheI 44. dotted lineashowi'ng illustrates thehb'sitioh of adjusted downwardly as it wears down so thatj J itremains in contact withthe Work under sub stantiallythe samelpressure. On'eof the positioi'is "of adjustment of the wheel after-it: has

Worn down -is shown in the {all lines in Fig 3-.

complished by swivelling plate 23 on plate 65 about bolt 64 as above described.- The swivel bolt 64-lsdirectly over the wheel I 5 in the vertil bufling wheel adaptedtocontact the work to be buffed, a floatii'i'gs'uppdrt including a counter-" V r wheelon the fiitedsupporfl in a predetermined" relationwith the work' to be buffed whereby the bufling wheel applies a predetermined pressure" to'the work during the bufiing operation, and

adjusted: t6 either of the dotted line showings in Fig, 7 the wheel is posi-y a w compression. spring acting iup'on-i :th 'whe'el and againstflthei-counterhaianmng:gspring to; cause the :buffinguwheei: to: contactuthe work 7 during the Lbuffinggoperation"--Withriairgmzdntei? mined-pressure AELZl 'all t positions to --.;whic1- adjusted.

buflingliwheel isrotatabljz supportedpaa eon- 'thelsaid compression-springbeing said member and acting between thQ -Saidl mem-" the frame and cause the b 'iingwi el to' spring.

d; adjusting mechanism; for

simultaneously; a

alanr-ing and-compression wherehyr ithe ten and-;'-t;heroompression mashing: r-1-a1n,e,ewbuneg Wheel adapted o ont-act tnewo. into he; buffed,

buffi svrota tahly'supported, a winter balancing spring for counterhalaneingthe weight,

of the buffing wheel and; pivoted. arm, a: oomwheelito- Contact the work duringthe buifing compression spring adjustabiy -mount ed'-on=. the frame whereby the pivoted ar m canhe to take up the wear onthe-bufiingiwheei withoutchanging the compressionand-tension reiatiom V ship of the said tension'and compressionsprings.

' 3,. In a hufiing' machine/ a; frame: abufifing wheeiiadapted to contact the Work :to vbe an arm. pivoted .on. the frame :unon Wi buffed,

remains the enmem'n" the buffing iwheel, as"

1 on the, frame; upon .whiol the.

aidizdoaftin 5 suntantathetworhilthe -said compression spring; ten;

7 ingm-pmt theipivoted aainmantt against: the: counterbalancing spring to cause'the buifing-zwheelsto contact. lathe" workduring: ;the;buffing i: operation with aimedeterminedspressurermherebythertensi'orrecompression relationship; of the said: tension and compression 'springs-remains the sarnewhen V the saidzanember is'adjustedz tmtakezunthe-wear onimebumng-wneei 1 o,

55min; a bufiingirmaol nneiaincludmg;artwork:fix- V i V tureforisupporting the work-izduring; theebufiing operatiom: arr-.arcuate track; positioned-about the pression; spring'acting uponthe arm against the counterbalancing spring to causethei'huffing' 5 operation with a predetermined pressurepasup-j I port for both the counterbalancingspring and ture approximately t d; geometrical-v centergof the-emulate tracig-ragsaddietadjustablealong the tracka motor 1 mounted upon the saddleuwithout v thettraok, amarmjpiyotallysupportedgat one: end

the saddle;\ a: buffingwheel rotatably mounted on; the: other end of, the arm withinxthe arcua-te ntracigt driving connections-between the motor and thegbuffing -rwhe el the; saidvmotor pivoted arm,

Q3 457 Wl nd-d n :mnnectio h ns as: semb eda' w a d su ported e e y-u n idv '7 s m her h t enm mnbe et al n e.

. arcuat track K; and the buflinggwheet maintained v continuously in contact with the; work. A

balancing springforjeounterhaianoing theweight' of the buffing wheel-- and; pivoted arm; a :corapression spring acting upon thearmand: again-stthe counterba lanoing spring toicause thebuffing wheeito contaetlthework during? the;v buffing i operation withla predeterminedpressure, amemher adju-staoly. mounted onlthe frame connected tonne pivoted arm for supporting the arm: and buffing wheeliwhen out otcgontact with 1.6 were,

her; and the 7' arm tending wtOwfOlf-IQ wheel upon thework during, the en ine operation, the said tension spring 15;: aisoca-rried hy'the' "said member and acting hetweenthe saidrmem her and the pivoted; against, the:- counterbalancing vspring-to float; the buifingrwtheel-ron work: during the bufiin'g operation a predetermined pressure-whereby themernb'ercan: I be. adjusted: totake-upthe wear on,- thewhee] r ntact fie n: b fime x ebme es l dm a 1k fixture for supporting the g'worls,during the butting operation, an .arcuate ,track positioned aboutthe b' receiving! s d-'e z ea iu -w i the fixtur i a proximately [the geometrical .eenter Jer me arcu eamk, said arcuate extending through" at. least 7180 a; saddle adjustable along the track, a meter mountedlupon the saddle with 'oiift 'thetial'clilan'arni piiiotel lxvsupported ation end by "the saddle; aebufiin'giwh eel rotatabiy' mounted. on, the other end ofithe arm: within the garcua tei tiaiclgf driviificonnections between the without effectingthecompressiono' 12136213 -f v mounted 7 on f the 5 arm, a imembermadjustably' mounted on said frame, astop:on'saidwmemheri upon-which the pivoted armrests when the 'buffing wheel is' out of Contact withfthe; work whereby the pivoted arm-:and buffingy-wheel ,-is supported by saidmember, a second stop on said-'member a compressionzspring carried by the-eaid member; and positioned hetween the second stop- -and-thepivoted arm, a tension spring one end of which'is connected to the-second-stop on said-member and the other end of which is. connected to said pivoted arm to serve as a counter-balancing spring, the: said pivoted,arm- "beings swung; :free 01f they first mentioned stop when the sbufiingwheelgoonaxis; EPulley having aplurauty of grooves con-:

centric with said) axis; a' 's ta'tiona'ry'motor sup porthat ing" ai'mo'tor' moun ed thereon, means drivingsaidpulleydroin Somm -tor, i'nans idr'iving 'saidspindleiromsaid pulley,"sprin'ging.means s'i lppdli tihgsaiti alrhi against atia-nan gle withresnect to:the ver'tica inefosculation offsaidia-rmloutofiitslselected posie 5'8J The combination; "E an armiirnountd: for os ui-auom lab-out oxen: axis; at .toTo1' .ho1ding spindle'rn'ounted in said arm parallelitdsaidtaxis; a" ptuley -concentri cwith said' axisga stationary notorsu pport haying a motor: mounted thereon, meansdriving -saidpuliey fromsaidmotor; means driving said spind1e -fr0m? said pulley, springing means supporting said arni against? gravity atan anglerwi th respect to the vertical, and springing means-unendingfirstnameaspring ngmeans l opposingosoiliation ofs-aidarm outofjits-seicted 7 position.

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