US1846330A - Scroll shear device - Google Patents

Description

Feb. 23, 1932. M. L. HEALD SCROLL SHEAR DEVICE 4 SheetsgSheet Filed April 26, 1928l l1 ii.

ATTORNEY Feb. 23, 1932'.

M. L. HEALD SCROLL SHEAR DEVI CE 4 Sheets-sheet 2 Filed April l26, 1928 z TOR SYM/. W l ATTORNEY Feb. 23, 1932. M, 1 HEALD 1,846,330

SCROLL SHEAR DEVIC E Filed April ze. 1928 4 sheets-sheet 3 AITORNEY Feb. 23, 1932. M- L, HEALD 1,346,330A

SCROLL SHEAR DEVICE Filed April 2e, 192e 4 sheets-sheen 4 s 'af i, mi i m4 in Z INVENTOM ATTORNEY Patented Feb. 23, 1932 UNEITLED .STATES PATENT FICE MATTHEW LEE HEALD, OF .PORTLAND MAINE, `ASSIGNOR T O AMERICAN CAN COMPANY, i

OF NEW YORK, N. Y., A CORPORATIONOF `NEW JERSEY sonora, SHEAR DEVICE Application illed April 26, 1928. Serial No. 272,897.

`cen'iifiguration of special form as for eXainple,.the staggered or undulating scroll `formaxtioiinot :Tin-frequently :provided `where the cut `strips are intended to be fed 'into a punch press vfor the :production ofvcanendsf-for the ordinary tin cans of commerce.

It will, `of course, be readily appreciated ftliatin the `production of canendsand other articles of nonrectangular formcare is taken `to `provide the strips `ofsucli sha-pe and di- `iiieiisions as to produce minimum Waste. This requires first acareful and economical layout oif the sheet itself, and secondthe accurate operation ofthe shear press `,in ac `cordaiice with the layout. .In ythe manufac- `turewofcan ends,tliestrip `is given-the undulating oi scroll edge V-Well known fin the art,

the enlarged partsof one istrip mating Awith the large parts of the-adjacent strips. Differently stated, in the layout thecanends to becut froma :predetermined strip arealter iiately laid yout with `respect to those -to `be `cut from the strips `next adjacent. Asheet olf `tin plate customarily provides strips to he fedto the forniingnrpunch press innuniher 4varying with the size `of `the can ends to be produced, six or seven of such strips zheingusual.

The sheet is automatically fedltothe shearing die in position 4to have 4theforvvard edge trimmed `toscroll forni. Atthe-nextfadlvance of 4fthe feeding mechanism, the sheet is arranged so that :thediesicut oif itwo strips `at one stroke, one said strip "lying `beyond the `dies and one Withintheir cuttingedges. This `underthe die influence.

Myinvention haszfor its lobj ectw broadlyithe limprovement iinfthe gaugingand registering devices for4 insuring that the successive pres `coinplish lthe Aforeg oing and other `desirable results in V,positive Afashion and throughk the cotations of the sheet parts to the dies will he accurate and this Withoutinterfering with the voperation of the shearing mechanism or requiring redesign thereof or of feeding mechanism heretofore employed.

Oneprincipal object ofthe invention uis to make certain that the sheet is first received at the shearing station and there yarranged for shearing in accurate position; another principal. object islthe re-registration of the sheet after each cut to insure against disarrangement as `a result ofthe shearing action `and the subsequentadvance of the sheet ,for

the next out; and stillanother principal obiject of the invention is to finsure `against improper `movement of the-sheet duringthe cutting operation and as a result of it.

Another important object of the invention isithe provision `of meclianisniwhich will acmovement of proper parts and devices and `this Without the provision of delicate or coin- `plicated :construction or lthe `provision of parts 'likely .to require frequent repair, re-

placement or adjustment.

Numerous other objects and advantages will beiapparent from the .following descrip- Ltion, which, taken in connection With the `ac xcompanying drawings, discloses a preferred l embodiment thereof.

embodying my present invention;

Fi-g. 21s atop :plan view `of the saine, the `35 lupper portionof the guide .frame for the active punch `being removed;

Fig. `3 is a partial section taken substan- `tially ontheline 3-3 of Figure 2;

Fig. 4 is a transverse partial -sectional "no view, taken substantially on the line .4--4 of FigureQ;

Fig. 5 is `a fragmentary sectional detail, taken substantially on the line .f5-f5 of Figure 2;

Figs. G, `7 and Stare sections taken `upon the line 33 of rFigure 2,-and showingthe arrangement of theparts atdiiferent stages of the, shearing offthe sheet;

Figi) lisa planvdetail showing one of the gauging devices in operative relation with respect to a sheet edge; and

Fig. 10 is an enlarged detail of a portion of the same and showing its action.

For the purpose of illustrating my present invention, I have shown on the drawings a scroll shear press of well-.known construction. It comprises the usual base 21, side supports 22, auxiliary support 23, bed plate 24, table extension or bed 25 and the shearing is aci complished -by the usual die organization comprising fixed dies 26, reciprocating die 27 and power means for reciprocating the die 27 to accomplish this shearing. Thispower means'comprises a main or power shaft 28, which'carries an eccentric 29. This eccentric in turn through eccentric strap 31, connecting pitman or ari-m32, and vertical slide 33 causes the die 27 to move to and within the die 26 at each shearing stroke of the press.

Referring to Figure 2, the sheets to be sheared are indicated at 36 and these sheets are delivered successively onto the left hand end of the bed where they are caused to advance by continuously moving feedchains 37, which chains are arranged over'sprockets at the ends of their travel, the sprockets at one end of said travel being secured upon a shaft 38, said shaft carrying a drive sprocket 39. A sprocket chain 41 is arranged over the sprocket 39 and also over a sprocket 42 upon an auXiliary shaft 43, this shaft having gear connection at 44 to main power shaft 28.

The feed chains 37 perform a preliminary operation, delivering the sheets to the main feed mechanism which will be now described and which advances the sheets between the dies intermittently, an advance being accomplished between the die reciprocations and in timed relation with the shearing organization.

`Themain feed mechanism comprises a plurality of slides 45 mounted to reciprocate in grooves 46 extending lengthwise of the bed and to adjacent the shearing organization. These slides 45 are provided with upwardlyspring-pressed dogs 47 6), these 'dogs being arranged to move in and out of recesses 48 in the slide'to engage behind the sheet to advance it the desired amount at each reciprocation of the slide. This feeding action in presses of this type is well-known and particular description of it is thought unnecessary. Tt maybe said however that the desired reciprocation is imparted to the slide by a link and lever assembly indicated generally at 49 (Fig. 1) and extending from a pivotal connection at 51 with a slide to a crank pin 52 mounted for eccentric rotation about the shaft 28.

It will be readily understood that it is important that each sheet as it arrives at the shearing station be accurately registered and gauged transversely of its path of travel. A

' xed gauge or guide 53 is arranged near the vextending across the bed. It comprises also connecting bars 62 secured at their ends to the bars 59 and 61.

It will be readily appreciated that the feed chains 37 by reason of their continuous movement deliver each sheet or may deliver each sheet in untimed relation with the reciprocating slide feed member, and throughout the feeding to the shearing organization it is de sirable that kthe feeding movement of the parts be prevented from advancing the sheet Ymore than the travel desired. This is accomplished in the present instance by upper pressure rolls 63 and lower power-driven rolls 64 (Fig. 6). The rolls 63 are mounted upon arms 60 fast to a rock shaft 65 having suitable bearing at v66 above the sheet travel. The shaft is provided at one end with an arm 67 having'a cam roller 68 at its free end. This cam roller engages a cam 69 upon a short shaft 71 which shaft is providedwith a sprocket 72 over which the sprocket chain 41 already mentioned is'trained. The lower rolls 64 are fixed upon ashaft 3 whichshaft carries a sprocket 74 driven' by a chain 75 from a sprocket 76 on shaft 28. Viewing Figure 1. it will be noted that rotation of the rolls 64 is continuous and in a counterclockwise direction. Portions of the rolls engaging the under surface of the sheet move. therefore, in a'direction to carry the sheet away from the shearing organization. The cam; 69 normally holds the rolls 63 out of action and is provided with recesses 77 into which the cam roll 68 may drop to bring the rolls 63 into contact with the sheet and press this sheet against the rolls 64 for'the restraining or return influence. When the rolls 63 are elevated the rotating-movement of the rolls 64 is without effect upon the sheet.

`When a sheet is first delivered by the chains 37 the rolls 63 and 64 cooperate to accurately register it against spring-pressed detents 78 mounted in housings 79 on the bars 62,` these detents extending down behind the rear edge after this edge has passed them.

The sheet thus positioned and prior to the first cutting operation is now given a final lateral gauging. A movable gauge plate 81 (Figs. 2, 4 and 5) is mounted in vertical position upon the end of a rod'or bar 82 having bearing ina bracket 83-through which shaft 71 extends. A spring 84 embracing the rod 82 and mounted between the bearing 83 and a l-C- 81 laterally `mounted'in position to engage the lateral registration. `best understood upon comparing Fig "i 59, 61 and G2.

`sliding movement. `thewcross members 98 at 99.

`collar on the rod normally holds the plate 81 in retracted position. The end of the rod ii-xed upon shaft 71 and moves the gauge plate of the apparatus to engage the presented sheet edge to move the sheet across its path ot travel to the desired final position.

'lhe lixed gauge 53 earlier described 'arranges the sheet somewhat out of the registration and nearer tothe side of the machine provided with 'the gauge 81 than is finally desired.

The sheet thus positioned and gauged is arranged for the initial cut. Its forward edge extends betweenthe diemembersand is trimmed in the first die rediproeation as shownin Fig'. 6 to the edge scroll form indicated at 91 in Figq. During this cut the rear edge of the sheet rests against the spring-pressed detents78. During'the idle movement of the press shear or die parts, the ieed slides 4,5 advance the sheetbetween the dies andiinto position to have two strips cut at the next reciprocation. This position is .shown in Fig/7, a strip part lying beyond the dies and a strip `part between `them. Just priorto this second reciproca-tion of the die, the sheet is again engaged both 'transversely and lengthwise ot its travel. by mechanism that will now .be descriliet Two locks 92 having an edge shape adapting them to mate with the scroll edge formed in the sheet are scroll edge7 and by the mating bringl the sheet to proper This action is 1 perhaps 9 and 10. The blocks 92 are secured to a cross-bar 93 and upper andlowor blades 9:1 and 95 are :u ranged to direct the edge of the sheet to the plane of the block and to prevent the sheet from moving out ot vertical registration during the-shearing action.

'.llhe sheet is ganged lengthwise of its travel by a gaugebar 96 mounted for recprocation in the overhead framework composed of bars Two rails 97 are mounted upon the under side of bars 59 and G1 and cross members 98 rest upon these rails tor The har 96 is secured-to A lug 101 eX- tends up 'from the gauge member 96 and receives a bolt i102 which is embraced by a spring 103 bearing against the lng and the collar 104L on the rod. Therod is connected `to a lever 105 pivoted at 106 upon its bar 107 i connecting bars 59 and 61.

This lever carries a cam roller 108l adapted to engage a cam 109 upon shaft 71. The gauge bar 96 is provided with a number oi down "ardly extending spiingpressed dogs 111, which dogs are l so positioned thateach reciprocating movement ot the feed slides advances the rear edge of the sheet into position for engagew ment. As soon as the ieed slides start back upon the idle stroke, the cam 109 moves the lever in a clockwise direction, `viewing Fig.

Y described.

he cut trom the sheet.

2, `and yieldingly `presses the sheet against the `blocl s92 to complete the registration. In the present instance, the blocks engage the `forward edge of the sheet at two points and a single gauge member 96 isiprovided, thus insu mg a three point registra-tion. A spring`112 connecting bar 96 with cross inemfber 98 holds thecam roller 108 `againstthe cam `and renders the action positive.

After the sheet has been thus positioned andgauged, the active die descends to sever thetwo strips as already described. Assoon `as the shearing is accomplished, the lower blade 9 5 is vretracted and the strip sheared maytall away for disposition as will be later A rock shaft 114e` is mounted in brackets 115 above the bed and beyond the shearing organization. Two arms 117 are fast npon'this rock shaft and depend to adjacent the lower blades 95 to which they have loose hook engagement at'118. The shaft 114 carries an arm 119 which is provided with a `cam roller "121 adapted to engage a cam 122 1upon a'stnb shaft 123 mounted in a bracket 115. A third arm 124 extends from the shait ior engagement by a spring 125 arranged to cause the cam rolls 121 to follow the cam rolls 122. The shaft 123 is continuv ously rotatedby ai chain drive which includes a `sprocket 126 on shaft V123, a sprocket chain 127 extendingover sprocket `126` and also about sprocket 128 upon a shaft 129which is continuouslyrotated by a sprocket chain 131 `from shaft 38. Shaft 129 is mounted beneath the bed 24 tor a purpose to be later set forth.

The apiiai'atns shown on the drawings 1s arranged to malte three stripproducing cuts and at thelast cut three strips are produced 1t `will be apparent that by adjusting the api'iaratus greater or less number of strips may In order to insure that the strips after cutting be freed of thedie organization and to insure also that the sheet be pressed against the lowerdies during the shearing operation. I have provided springpressed plungers'132 upon the moving die and arranged in bracket-s 133 t'or engagenient with the sheet before and after the shearing. Springs 134 are positioned between the brackets and collars 135 fast on the 'plunger 132.

the strips rre cut they fall into receiving magazines, those being cnt in advance ofthe die slidingdown into `a magazine formed by angle members 1111 and 1112. Those being out between the lined dies fall upon a guide shelf 143 and into `an intermediate magazine formed by angle members 144 and 145. The strips cut behind the die are received upon av guiding plate 1/16 and directed down into a 4magazine formedby angle members 147 and 148. The waste formed in trimming the forward edge of the sheet falls through between the fixed dies and isv received upon a guide plate 150 down which it slides and by which it is directed out of the apparatus. In order t-hat none of this waste may be received in the intermediate magazine, the plate 143 is pivotally supported upon a rock shaft 151, which rock shaft carries an arm 152 having a cam roller 153 for engagement with a ,cam 154 upon shaft 129 already mentioned, this cam lifting the guide plate 143 up and out of the way of the waste indicated at 155 in Fig. 6 when the forward edge of a strip is to be cut.

There is, thus, vprovided an apparatus that receives the sheet 36 ontlie upper surface of the table 25, the sheet being moved forward by feed chains 37 and positioned laterally of the table by the guide 53 cooperating with the roller 54. The sheet, thus, initially located and advanced over the table is brought into the second feed mechanism comprising the slides which further advance it in a step-by-step movement. The sheet prior to each advance movement of the slides 45 is accurately positioned in their feed dogs 47 by rollers 63 (intermittently operated by connection with the cam 69) cooperating with the power driven rollers 64. Cain 69 makes one complete revolution for the entire operation upon a single sheetand inasmuch as there are four cutting operations on a single sheet. this cam is provided with four recesses 77. In the first position of rest following the 'first forward feeding action of the slides 45, the sheet is gauged laterally by shifting of the gauge plate 81 operating by connection with the cam 86. Cam 86, like cam 69, makes one complete revolution for all of the operations on the sheet. This cam has only one projection (Fig. 4) and plate 81 is, therefore, only shifted for the first or initial trim 'operation on the front edge of the sheet. Sheet 36 is next advanced for the second cutting operation, its front edge being now provided with a scroll or undulating edge. The sheet is brought into accurate gauge position just prior to the cutting operation by shifting of the gauge bar 96 engaging the rear edge of the sheet and moving the front scrolled edge into accurate alignment longitudinally and laterally by centering the scrollI edge against the gauge blocks 92. Bar 96 is controlled by .f cam 86 which is provided with three projections .(Fig. 5) each projection shifting the bar forward for a gauging operation. These projections are spaced around the cam1at 90 iptervals, the blank or intervening space passing the actuating mechanism ofthe gauge bar 96 when the sheetv is initially brought into the position for trim at which time no front edge gauging takes place. There now follows three cutting operations, the gauging of the sheet by the bar 96 andthe blocks 92 taking place just prior to each of the three cutting operations.

It is thought that this invention and many of its attendant advantages willI be understood from the foregoing description, and it is apparent that various changes may be made in the form, construction and arrangement of the parts without departing from .the spirit and scope of the invention or sacrificing all of its material advantages, the form hereinbefore described being, merely a preferred embodiment thereof.

I claim:

1. In a shear press adapted to cut asheet of metal into transverse strips, the combination of a bed across which the sheets of metal are adapted to be successively fed, a shearing organization associated with said bed, a feeding mechanism for advancing said sheets across said bed and operating in timed relation with said shearing organizations, a movable gauging device arranged at a side of the path of travel of the sheets to the shearing organization, cam actuated means acting in timed relation with said feeding device and said shearing mechanism and connected with the feeding'mechanism whereby the latter presses said movable device against the side edge of the sheet for gauging said sheets laterally and as incident to the feeding of them to the shearing organization.

2. In a shear press adapted to cut a sheet of metal into transverse strips, the combination of a bed across which the sheets of metal are adapted to be successively fed, a shearing organization associated with said bed, a

feeding mechanism for advancing said sheets across said bed and operating in timed relation with said shearing organization, power actuated means acting in timed relation with said feeding device and said shearing mechanism whereby the power of the press acts to press and gauge said sheets laterally and as an incident to the feeding of them to the shearing organization.

3. In a shear press adapted to cut'a sheet of metal into transverse strips, the combination of a bed across whichthe sheets of metal are adapted to be successively fed, a. shearing organization associated with said bed,` a feeding mechanism for advancing said sheets across said bed and operating in timed relation with said shearing organization, reciproeating means connected with and acting in timed relation with said feeding device and said shearing mechanism whereby the power of the press acts to press and gauge said sheets laterally and as an incident tothe feeding of them to the shearing organization.

4. In a shear press adapted to cut a sheet of metal into transverse strips, the combination of a. bed across which the sheets of metal are adapted to be successively fed, a shearing organization associated with said bed, a feeding mechanism for advancing said sheets across said bed and operating in timed relation with said shearing organization, a movable gauging device arranged above the sheet travel and adjacent said shearing organization for moving said sheet into final and accurate shearing position, a fixed gauging device mounted in the path of travel ot' the sheet and cooperating with said movable device, and a cam connected With the press mechanism and operating in timed relation With said shearing organization for actuating said movable device against the sheet.

5. In a shear press adapted to cut a sheet of metal into transverse strips, the combination of a. bed across which the sheets of metal are adapted to be successively fed, a shearing organization associated with said bed, a feeding mechanism for advancing said sheets across said bed and operating in timed relation with said shearing organization, and a fixed gauge device arranged beyond said shearing organization for engaging the prei sented edge of a sheet and formed to register said sheet accurately both transversely and lengthwise of the sheet.

6. In a shear press adapted to cut a sheet of metal into transverse strips, the combina- 'tion of a bed across which the sheets of metal are adapted to be successively fed, a shearing organization associated With said bed, a feeding mechanism for advancing said sheets across said bed and operating in timed relation with said shearing organization, a movable device and a fixed gauge device arranged beyond said shearing organization for engaging the presented edge of a sheet and formed to register said sheet accurately both transversely and lengthwise of the sheet, said movable device moving in timed relation with said shearing organization to accomplish the sheet registration.

7. In a shear press for forming strips with scroll edges and from Which disks may be cut as for the forming of can ends and the lille, the combination of cooperating dies for shearing the sheet of metal transversely and adapted to provide the scroll edges, feeding mechanism Jfor advancing the sheet into position for operation of the dies and a device engaging a recess of a scroll edge left in the sheet by an operation of said die for registering the sheet With respect to the dies and transversely of the travel of the sheet.

8. In a shear press for forming strips with scroll edges and from which disks may be cut as for the forming of can ends and the like, the combination of cooperating dies for shearing the sheet of metal transversely and adapted to provide the scroll edges, feeding mechanism for advancing the sheet into `position for operation of the dies and a device shaped to conform to the scroll cut by said die and adapted to engage a sheet edge to register the same.

9. In a shear press for forming strips with scroll edges and from which disks* may be'cut as for the forminglof can ends andthe like, the combination :of cooperating dies for shearing thesheet of metalltransversely land ing movable toward and from-the presented i" sheet edge to register the sheet both transversely of and in thedirection` of its travel as it is `fmcnfed into `cutting position.

10; Ina shear press for` cutting` a sheet otmetal into transverse stripshaving edges of predeterminedcongnrationnthe combination of a shearing organizationpmeans feeding the sheet progressively into shearingposition and devices arranged on oppositesides ofsaid shearing organization Iforregistering said sheet laterally of its direction "of-travel in `accurate registration with said dies, the device at one side ofthe sheet being connected with the pressmechanism and thereby pressu, i

ing the sheet against the opposite device.

1l. `In `ashear pressfcr cutting a sheet of metal into transverse strips having edges of predetermined configuration, the com-bination `of a shearing organization, meansfeeding `the sheet progressively `into shearing` positionand devices `arranged on opposite sides of said shearing organization forregistering said sheet laterallyof its direction "of travel in accurate registrationwith said dies, some fof saidfdevices being power actuated and moved in. timed relation to said shearing organization.-

12. In a shear press adapted tocu'tafsheet of metal into transverse strips, the combination of a bed across which sheets of metal are adapted to be successively fed, a shearing organization associated With said bed, means feeding the sheet along said bed into said shearing organization, a guiding device arranged upon said bed and adjacent the end remote from said shearing organization for positioning said sheet transversely with respect to itspath of travel, a movable gauging device arranged between said first mentioned device and said shearing organization and connected With the press mechanism and pressed thereby against the side edge of the sheet, for initially gauging said sheet across its path of travel, and gauging devices arranged adjacent said shearing organization for finally gaugingsaid sheet to position it into predetermined relation with said shearing organization.

13. In a shear press for cutting a sheet of metal into transverse strips having scroll edges, the combination of a shearing `organisation, means for feeding the sheet `progressively into shearing position, devices arranged on opposite sides of said shearing organization and cooperating with each other ios tov register said sheetrelative to -saidshearing organization along one of its scroll edges',

the device at one side of the sheet being coni nected with the press mechanism and thereby pressing the sheet against the opposite device, devices for holding saidk sheet in .registered position during the cutting operation, and means for moving some of the last mentioned devices to discharge a strip from cutting position after the same has been severed from the sheet.

`14:. In a'shear press for cutting a sheet of metal into `transverse strips having scroll edges, the combination of a shearingorganization, means for feeding the sheet progressively into. shearing position, devices for'registering said sheet relative to the shearing organization,including a centering gauge engaging the front scrolled edge of the sheet, members associated with said `devices for holding the sheet in registered position for the cutting operation of the shearing organization, and means for actuating said holding members to permit vdischarge of a strip cut from-the sheet. J A

*15.v In a shear press for cutting a sheet of metal into transverse strips having scroll edges, the combination of a shearing organization, means for feeding the sheet progressively into shearingposition, devices for registering said sheet relative `to the shearing organization, members associated with said devices for holding Vthe sheet inregistered position for, the cutting operation of the shearing organization, means for actuating said'holding `members to release a strip cut from said sheet, and means for discharging said strip fromcuttingposition.V f

y MATTHEl/V -LEE HEALD.

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