US1288037A - Machine for shaping metal. - Google Patents

Description

F. l. KOTZICH.

MACHINE FOR SHAPING METAL. APPLICATION FILED FEB. 24. 1916.

1,288,037. Patented Dec.17,1918.

4 SHEETS-SHEET 1.

F. L KOTZICH.

Patented Dec. 17,1918.

4 SHEETS-SHEET 2.

MACHINE FOR SHAPING METAL.

APPLICATION FILED FEB. 24, l9l6- 0 .0 Q O MN 4 F. J. KOTZICHi MACHINE FOR SHAPING METAL.

APPLICATION FILED FEB. 24, 1916.

- 4 SHEETS-SHEET 3- Patented Dec; 17, 1918.

F. l. KOTZICH. MACHINE FOR SHAPING METAL. APPuc/nmu FILED FEB-24.15MB.

Patented Dec. 17,1918.

4 SHEETS-SHEET L LII! lll il -l MQQQ Na 1. FQ

we es,

j En snares rams.

"amass. KoTzI'c-n; or 'cnicaeo, thinners, ASSIGNOB, o a. STEIN CHICAGO, ILLINOIS, "A CORPORATION.

& cantata, as

MACHINE on SHAPING METAL.

To all whom it mac concern Be it known that I, FRANK J, KOTY'Io'H, a subject of the Emperor of Austria HungarTy,

' residing in Chicago, county of Cook. and

State of Illinois, have invented certain. new and useful Improvements in Machinesfor .Shaping Metal, of which I do declare the following to be a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this My present invention, while preliminarily designedto provide 'a machine for forming clasps of metal preferabl covered with a fabric (a sample of this type of clasp'being shown in. Letters Patent No. l,l99,l-9l,-'dated' September 26, 1916) is susceptible of a much wider application for the manufacture "of various other articles. The invention con.- sists in the novel features of construction hereinafter described, illustrated in the accompanying drawings and particularly pointed out in the claims at the end of this specification.

Figu're'l is a front view of amachine emwith fabric from which blanks, to be subsequently bent, may becut. F ig. 3 is a per spective view showing a blank that has been out and bent by my machine. Fig. 4 is a view on an enlarged scale in vertical section on line4= l of Fig. 1. Fig.5 is a view in vertical section similar to the left-hand portion of Fig. 4 but showing-parts in elevation. Fig. 6 is a detail perspective view of a plunger 'for ejecting" the finished blanks;

from the machine. Figs. 7, 8 9. and 10 are detail views in front elevation showing more particularly the dies and die actuating mechi'rnisms indifferent positions the cover "plate being'removedfl Fig. 11 is a' view partly in sectionand partly in plan, on line 11-11 of Fig. 1..Fig 12 is a detail view'in vertical section} on line 12-12 of Fig. 1. Fig. 13is a detail view in vertical section on line 13 13 of Fig. 1. Figgl iis view in vertical section on line 14-14: of Fig. 1 V Adesignates the main standard of the machine that is formed'preferably of cast metal and is provided at its upper end with. an ex- Fig. 2 is a per-.

Smimm Letters Patent- 7 Patented Dec. 1 7.1919. Application filed February 24, 1916. 3 Serial No. 80,130 m tension a. Through the .top of the standard A'and throughits extension at passes a shaft B, preferably encircled by assuit'able bearing sleeve 6. Upon one end of the shaftB is loosely mounted "a drive pulley B. and between the'adja ent end of the standard A and the pulley B is placed a suitable clutch whereby the pulley B maybe thrown into and out 'oftgear with the shaft B. As shown,- the clutch consist-s'of a sleeve actuated pawl '0.

this pawl'c being normally forced toward I engagement with teeth cformedupon the adjacent-end of the hub of clutch forms no part of my present inven- 31011, I do not deem t necessary to describe it at greater length, it belng sufiiclent to-"sa v that when the rod -0 is drawn downward (as by a treadle.) the arm '0 will be moved downward in the annular roove c of the sleeve 1( below thenotchc of the pawl 0 and thus will allow'the'pawl 0 to 10 k the pulley B to the shaft B. To the endof the extension a is fastened. as by screws d, a supporting plate or bracket D having at. its lower end an outwardly projectingfiange d" and having its lowerportion extended laterall as shown in Fig. 1, to support the feedmechanism" and adia ent parts. s Between the outwardly projecting portions d and d o'f'a block or plate D (see Fig. 11 secured to the front of the plate or bracket D is m unted the die mechanism by which 'theblanks' will be bent. The precise "character. ofthis die niehanism may be varied in keeping with the/kind of work to be done, but I have shown the d e mechanism the form shown'in" Fig.3 of the drawings. Each of these blanks comprises a -U-shaped body port on E wi h inwardlv folded. endse. The'blank may be formed of a strip of C that is fixed to the shaft B, this sleeve carrying a springas comprising dies. adapted to bend blztfkSlO' metal E having a coveringe of fabric, as

- illustrated in Fig. 2, the edges of the fabric hesivejmaterial. g

-Upn'the flange or shelf al of the plate D is mounted a *female die F that may be held in place bya pin 1 (see Fig. 4:) and this die isfformed with a-central recess f torec'eivethe blank aS..:1s finalbending is eriected. Each of the side walls of the temale die F is formedatits-top .witha seat 1 I "as the roll 25 enters the offset or concenf and with a shoulder f the purpose of which, as .--clearly shown by? Fig. 8,'-is r0300 operate with portions of themalejdie-in effecting the initial foldingof the edges c of the blank i I Abovethe' teinaledie F isinount'ed a male die that is'shown asconsistingof a plurality of parts, v1z., aFcentral male d e G for ,1m-

.parting a U-shapedbend to the body o'fthe' blank E, side dies 9 for effecting theinitial folding of the edges ofithe blank 'a'nd side" dies for cooperating with the female die incompleting thefolding of the redgesof the blank, as clearly shown in FigflOof the drawing.;A suitable cover plate a (see 'Figs. 1 and 11) will retain the'dies within the chamber of the bracket D. The central "male die G is formed with an expanded head 9 and about the upper portion of the shank of this die is set a coil spring H, the lower 2 I endof which bears upon'the pin It that passes through the stem. of the die Gr, while the upper end of-the spring presses against a shouldered portion20 (see Figs. L and 9) thatproj ects forwardly from the upper part c of the shank of the side dies 9', being understood that these: dies 9' are shown as formed at the lower end of a U-shaped body (see Fig. 11) the upper portion ofwhich is cut away to admit the coil spring H (see Figs. 7 to 10). To. the upper portion20 of the body'of the side dies 9' is secured a pin 21 to which is pivotally connected the lower hub of a link 22, the upper end of this link .beingvpivotally mounted, as shown in Fig. 4, upon the outer end of a wrist pin 23' that projects from a'cam wheel K keyed to the outer end of the main shaftB} When the cam wheel K is revolved, theiconnection between thecam wheel and the upper portion 20 of the side male dies g will cause the side male dies 9' to descend and at the same time will cause the central male'die G to descend because of the pressure exerted upon the stem of the die G from the coil spring H. .VVhen, however, the die G'has' about reached the limit of its downward inovement, as shown in Fig. 9, the contlnuedrotation of the cam wheel K will .cause the side dies g to move farther: downward, the coil spring H being compressed, as" shown in Fig. 10.. The purpose of this 'relative movevthe central cavityofthe female die. order to eject the blank from the female die,

in Figs. 4; and 6 of the drawings. mechanism comprlses a plunger or ejector ment ofithe central die G and the side male dies 9 is to complete the folding of the upper edges of the blank, as willfhereafter more fully appear. 7 r e From the upper end of the shank or body portion of theside male dies g projects apm carrying a roll 25 that enters a cam groove 26" in the cam wheel K. The greater part ofthis cam groove 26 1s concentric and while the roll 25 is within this concentric part of the groove 26 no movement will be imparted to the dies 9. As soon, however,

trio portion 27 of the cam way, the dies 9 will be forced downward from the position shown in Fig. 7 to the position shown in strip E, thedescent of the side male dies g -will-causethe upward turning of the edges oftheblank'E, as shown iii-Fig. 8 of the drawings, after which the continued rotation of the cam wheel K will cause the withdrawal ofthe dies 9, as shown in Fig. 9 of the drawings. 'By-reference more'particulady to Figs. 7 to 10 of the drawings, the relative operation of the dies in forming the folded blanks will beseen tobe as follows: The rotation of the cain'wheel Krfirst causes 7 the side male dies 9 to descend and to cooperate- With the seats f and shoulder f of the female die F in bending upward the edges of the blank, a's shown in Fig. 8 of thedrawingsn As this bendingof the edges of the blank is eiiected and asthe side male dies 9 are retreating, the central maledie G dieG will force the blank E into the central cavity of the female die and will impart aU shaped bendto the body of the blank. j Afterthe central male die .G has reached the limit of its movement, the further' downward movement of the side male vdie gwill cause these dies topass from the -POSltlOD shown in .F 1g. 9 to the position shown in F1g.:1O-of the drawlngs, and in doing so they will complete the folding of the edges c of the blank E pas shown in Fig. 10.

When blank E has been folded, as shown in Fig. 10,-the continued rotation of the cam wheel K will cause the link 22 to lift the central maledie-G and side male j-dies g to the position shown in Fig. 7 of the: drawings, leaving the folded blank E in In I, provide the. mechanism next to be described and illustrated more, particularly This and theside dies '9' will be moved'dowin ward by the link 22-, as shownin Figs. 8 and 9 of the drawings, and the central male Lli2885037 l hl g lla-lfillg tt head m zconform ng..;ingeneral outline to the ,shape off the female ;,die:1and this, head seats-normally within; a: recess 130 see; Fig. t) formed in the blockldDi that is bracket D. {The s'tem'fof the plunger M passes through theebl'Ook D and platev=D and i has 1 its L outer end: pivotally;, connected i .to Qa lever .pivotally mounted vupon a bracket 36, the lowerend of this; lever: being forced normally away from the plate D .by a

spring .37 (see Fig. A). a Totthe:uppermend of the .Ileve1135 gisl pivotallyncoimectedaa, rod 7 38 that passes through; the plateD, andithe end of:tl1e;r0di38 projectsaabeneathsthe;pe-' ripheryzof. the cam. wheelrK. :By; reference l i to Figs.;5,,z7, and, 10 of: the drawings, it.will

' .be'seen-that u Onvthe peri-phery'of thewc-am wheel K is formed sanx inclined or camshaped rib 39 4 and the purpose of this rib 39. is to; contact-Jwith; the end of'zthe rodl38 and causeEthis rod to move backward so-as-to ulllOVG. the lever and theplunger M :i-from the position shownlby;full lines in Fig et'to r the. position v shown I by .fdottedi lines iTliis operation of. the ejector mechanismrbytthe.

A campplate or. ribl39 willioccur shortly-after :v the male dies thus :operated, '1' the folded blanks =.will he thrown outward through the-opening y tin ithefifront plate {(see' Fig.' 1 When the pin: 38 escapes flOlIl contact with the cam 11% P 5 P I retract the plunger t the pasit Shown fuu "lines in Fig .-4 V p l At'the f feed =side the male dies ar- 7 ranged. ai'knife O',"the lower sharpenedend of which --coop'erates with a blade O' In we formthe 'folded blanksl E. As shown,

severing the strip "E into pro er lengths the knife is secured 'to' the a side of the the blade 0' will be seen that the severing of the strip will occur immediately before the dies come into action.

In order to direct the strip" E accurately to position over *the female die E",

I employ f the I yielding guide next to? be dosribe'd. As shown,this-guidecomprises a channel-shaped plate P having upper and lower members between which will be "fed the strip E of material from whichi the -bl rinks-are to be formed. The guide PIis-pivotec by means of a: pin 40,; to an arm 41 that is fixed upon the guide rodslQaIid $43,

the f ends of rods being mounted re spec-tively insockets formed in the side 32, to themplate or tends into the path ofithe end and 14) have::been retra'etedfromgthe v female die. When the ejector mechanism is block having raised slots 63lthrough which will pass the strip "15. "From the block160 projects apivot pin R, the strip E barsd and in the bracketet5that isifastened to. and projects forward from the extension d ofthe plate D (see Figs. 1 and 11). By reference more particularly to Figs? to 10 of the drawings, it will be seen that the lower member of the. guide P exof the knife 0, although notquiteso far as the knife 0.

-' Hence, when the knife 0; descends to sever the strip E it will force downward the strip-andthe free end of theguide,the guide turningwabout its pivot 40. 'In order to restoreithe guide and the;.strip-' to position to enable the strip to be accurately fed between the dies, I preferably employ a coil spring-5O mountedvupon' the rod 43, this spring having its lower end '51- extending beneath-the" free end of the guide P, while the opposite end ofv the spring is turned upward and into engagement with the "rod fed' between" the knives and I the d188- In order to fee'di the strip E, I prefer to employ the-mechanism next to be described.

Uponthe rods 42 an'd 43" is mounted arslid- --ing'sblockor ';=carrier' 60 (see Figs. 1, l1 and 13 'of thedrawings). To thelower end :of this sliding block orearrier'60 is secured, as

42(see Figs. 1; Hence, it will be seenthat after the-knives O and '0' havesevered" thestlip and the' knife O recedes, thespring 50-will cause the guide =1? -"-to move upward and bring the "free --endxof the "Strip '-E into proper position to be by-a screw.6l, 'a guide -62 consisting of a portions provided with 65 on which is'mounted a feed pawl R, the

lower "end' of; this pawl extending between the raised portions of the. guide block 62 and insu'ch. position that when the block 60 is moved forward, carrying with it the pawl will be advanced .a' distance corresponding to the travel of the block" 60. I coil spring 67 mounted upon the pivot pin 65.has a bent lower end engaging the "lower'end of the pawlR andthe bent upper end'secured to the block ,60,

this spring'serving-to force the pawl R'downward nto engagement withthe strip E. Inorderto' slidetheblock 60 backand forth for the purpose of causing the pawl R to feed the strip "E, I-projectapi-n'fiS from the backof the blockl60-into-a slot 69 formed at the'lower end'of a rockinglever '70that is 'pivotally mounted :upon a stud 71 projecting from the front ofthe plate D. The upperarni 72of the lever "70*(see Fig. 12) is provided with a pin carrying a friction roll 73xadapted'to be engaged by a cam 74 formed'uponthe 'periphery'of the cam wheel K. Hence, it will -be seen that when in the revolution "of Y the cam wheel the cam74 strikesthe "fr cnon-r611 73 of-the upperend of *the lever70,

- the rocking ofthe'lever 7t) will cause the ,block 60 to slide along the rods 42 and 43 carrying with it the 'pawl'R and, thus admechanism shown more particularlyinFig. 12 of the drawlngs. Thismechanlsm come l vancing the strip E? along the guideway P and between. the male and female dies. "In orderf'to retract theiblock 60 and the pawl 11,1 prefer toemploy the adjustable spring prises a coil spring 75 that, encircles the stud 7 1.: The innerend of this spring 75 is secured within a socket formed ini the hub Ofzjthe rocking lever 70, while the outer end of-{the coil spring is secured within a socketformed ina sleeve 7, 6 slipped over the [end of the stud71 and inclosin'g'the coil ,spring Throughtheend of, the sleeve 76 passes a screw '77 that enters a threaded seat in the end of the stud 71. The outer surfaceof the sleeve 7 6 is preferably milled orroughened so that by turning the sleeve- 76 the desired tension may be given {to the inent of the sleeve f coil spring 7 5 for properly retracting the rocking lever 70; and when the spring 75 is placed under proper tension by turning .the screw 7, the end of the sleeve 7 6 will be firmly jammed against the end of the stud" 71, thereby preventing any backward movetension. of the spring. Y

being arranged above a guide 1 62 corresponding to the guide 62 beneatli the feed .55 Q parted to-the strip E, but if it iszdesired adjusting pawlR. Upon the pin 89 on which the f check pawl S is pivotedisarranged acoil spring 81-similar to the-coil'spring'fifl here- I inbe'fore described, and serving torfor'cethe free end of the check pawl S- downward onto the strip E as. it passes over the guide-62". I i f :In order to determine the extent; of feed imparted to thestripE by the feed pawl R,I provide'an adjustingscrew'85 (see Figs. l and 11) that-passes through a threaded 'holef in the block 45. InFig. 1, the feed pawl R and the block are shownrat the limit of I "theirbackwardmovement and the block 60 g asf contacted with the end of the adjusting screw 85 and "also with a stop sleeve' 86 to feed the strip E for shorter blanks, the

When themetal strip E is c'arried upon a reel T lfprefer to mount this reel upon a supportingiarm Q'Othatis pivotedto a stud 9 1 ,projectingoutward from the extension 7-6 that would relax the screw 85 will be :turned forward so as to limit the backward movement ofthe feed pawlR. r

of'theplate'or bracket D. The free end of theqarm; '90; carries a pin 92 that passes through'thehead of the'reel T, a'sleeve '93 provided-with a set screw 94 serving to hold the 'reelxT revolubly' upon the pin'92. The strip E ',]being "coiled upon the reel T, is curved -'andthe degree of curvatureof the stripis greater in that part'of the strip that iscoiled around the centralportion of the reel. It is desirable 'to take the bend or curve out of that/part of the strip that is nearest the centrallpartfofthe reel, and to this end I provide the straightening mechanism next to be described. "Upon a bracket95 (see Fig. 11);secured to the plate D are mounted a pair of straighteningrol'ls 96 beneath which the strip E will pass and below the-rolls 96 'isathird straighteningroll 97 that-is mounted-upon a stud projecting inwardly from the supportingarm '90. To the supporting arm 90 is.:.pivotally connected the bifurcated lower end of an adjusting rod 98 that passes through- ,a sleeve 99 projecting from the bracket 95o-(see Figs. 1 and 11), and upon "this adjusting 'rod s mounted a coil: spring 100 thetension of whichcan be adjusted by -mean'ssoffa thumb nut 101. that is mounted 1 upon tlieupper end of the rod" 98. When jtheZreelQT is full,'there is comparatively littlecurvature in thestrip E- and this can be readilyremove'd by passing the strip belowtheltw o straightening rolls 96' but as thestrip E is drawn'oif the reel, it lsfound thatthe portic m of the strip adjacentthe centraljpartlof the reel is moresharpl bent and ito straighten this part ofthe strip the lower straightening roll 97-shouldbebrought into action, Thepurpose ofthe adjusting screw 98jis to 'enablethe lower straightening jca lly ,Thus, itwi l be seen that iftheten- 7 sion of the sprin IOObe-prO erlyadjusted for the fullreel T, the rolls 96 and 97 will be "separated, as shown in Fig.1, as the initial portionof the strip is drawn from the reel ;,but' as thestrip .is drawnoff and the ,weight of'the reeldecreases, the supporting arm; 90; willtris'euntil the straightening roll *97 isgbrou'ght tobear uponthe under side of strip.-

;Vhil e I have described what I, regard as .o the preferred embodiment of 'my invention, I it willbe understood that the details of conastruction aboveset out may be varied with .outdeparti'ng from the-scope of the invention and thatfeatures of the invention may be employediwithout itsoadoption as anen- .tirety';

; I claim a'new and desire to secureby Let- -ters' Patent-is:5rL, i p

1;}Inamachine of the character described, the combinationwith means for feeding a roll97 tobe brou ht into action automati-.

thestrip E and willaid in straightening the v :Havingtliiis described invention, what blanks, of means for first partially bending thefend portions of said blanks, means for next imparting a U-shaped bend to that part of .each blank betweenthe partially bent ends to bring the edges of said ends adjacent each other, and means for finally folding inwardly the partially bent ends of the blank onto the inner face of the body of the blank.

2. In a machine of the character described,

thecombination with means for feeding a covered metal strip and cutting it into blanks, of a central male die and side male dies arranged alongside said central male die, a female die recessed to receive said central and side male dies, and means for forcing said central and side male dies successively into said female die,'said dies being so shaped as to impart a U-shaped bend to the body of each blank and to fold inwardly the ends of the blank onto the inner face of said body.

3. In a machine of the character described, the combination with means for feeding a covered metal strip and cutting it into blanks, of a female die having a deep central recess and having a recess above and at each side of said central recess, a central male die and side male dies arranged to en ter said central recess, other side male dies adapted to enter the recesses at the side of said central recess, and means for successively operating said male dies to first impart an initial bend to the ends of each blank and afterward impart a Ushaped bend to the body of the blank and fold inwardly the initially bent ends onto the inner face of the body of the blank.

4. In a machine of the character described, the combination with means for feeding a strip,-of means for severing said strip into blanks, a female die, a central male die, a

pair of independently operable side male dies at each side of said central male die, and means for successively operating the outermost of said side male dies, the central male die and the innermost of said side male dies to first partially fold the ends of each blank. then impart a U-shaped bend to the body of the blank and finally complete the folding of the partially folded ends of the blank upon the inner face of the body thereof.

5. In a machine of the character described, the combination with means for feeding a strip, of means for severing said strip into blanks, a stationary female die having a central deep recess therein to impart a U- shaped bend to the body of each blank and havlng at the sides of said central recess Walls provided each with a seat at its top for the partial upward folding of the ends of said blank, a central male die adapted to force the body of the blank into the deep recess of the-female die, relatively movable side male dies for forcing the ends: of said blank into said seats at the top of the walls of the female die to bend upwardly the ends of said blank, and'means for reciprocating saidside male dies that bend the. ends'rof the blank in advanceof-the reciprocation of the central male die. V r

, 6. A machine for forming a channelshaped body having its ends folded inwardly toward each other, comprising a single-female die having a deep central recess for imparting a bend to said body and having at each side of said central recess a recess and a male die adapted to impart an initial upward bend to the corresponding end of said body, and male die mechanism having a central portion adapted to force said body down into said central recess and having side portions movable relatively to said central portion and adapted to complete the folding of the ends of said body inwardly onto said body. a

7. A machine of the character described, comprising a female die havinga deep central recess therein to impart a U-shaped bend to the body of a blank and having at the sides of said central recess stationary walls provided each with a should'r at itstop and with an upstanding lip outside said shoulder, a male die provided with a central portion adapted to force the body of each blank into the deep recess of the female die and provided with side portions movable relatively to said central portion and adapted to turn upward the ends of the blank and to force the ends of said blank downward and inward against the inner face of said blank.

8. A machine of the character described, comprising a female die having a deep central recess therein to impart a U-shaped bend to the body of a blank and having at the sides of said central recess stationary walls provided each with a shoulder at its top and with an upstanding lip at the outer portion of said shoulder, male dies formed of separably movable parts and having outer side portions forturning upward the end portions of said blankand provided with other portions between said side portions adapted to force the body of the blank down and into the deep recess of the female die and to complete the inward folding of the ends of the blank against the body thereof, and means for reciprocating said outer male dies in ad-, Vance of the reciprocation of the male die portions between them.

9. In a machineof the character described,

the combination with mechanism for feeding mechanism, a spring for sustaining said sup porting means, and a screw for ad ustingthe tensio of. said spring whereby the pressure of'the straightening mechanism will be increased as the Weight'of the coiled spring decreases. v I

the coiled strip decreases'the pressureof the straightening means will be increased.

10. In a machine ofthe character described,

' the combination with mechanism for feeding 5 a metal strip, of means for straightening the I strip located in advance of said feeding mechanism, a support for the coiled strip located in advance of said. straightening I i FRANK KOTZICH.

copies of this patentmay be obtained for fire cents each, by addressing the Commissioner of Patents,

Washington, D. C. I

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