US1603265A - Method and apparatus for cutting sheets - Google Patents

Description

Oct. 19 1926. j 1,603,265 o. s. BEYER v METHOD AND APPARATUS FOR CUTTING SHEETS INVENTOR 0616 a.

By Attornys,

1,603,265 O-[Sw BEYER METHOD AND APPARATUS FOR CUTTING SHEETS Oct. 19 ,1926.

Filed Ma'rph 21, 1925 2 Sheets-Sheet 2 INVENTOR Patented Oct. 19, 1926.

orro s. Emma, or-nnooxmm, NEW YORK, ASSIGNOR,

BY MESNE ASSIGNMENTS, '10 E. W. BLISS COMPANY, OF BROOKLYN, YORK, A OCR]?ORATION OF DELAWARE.

METHOD AND APPARATUS non. CUTTING SHEJTSf Application filed March 21, 1925. Serial No.,-17,'421.

This invention relates to zig-zag cutters and to a method of cutting sheets, and aims 'to provide improvements therein.

The invention provides a'method of cutting scalloped strips from sheets of metal in such manner to obtain from the sheet the maximum of useful blanks, and the minimum of scrap. Theinvention t'u'rther provides a method which is rapid and which may be carried out by machines of relative line III-III, Fig. 2.

ly simple construction, and ble and reliable in action.

The invention further provides an apparatus having the above indicated characterwhich are duraistics and advantages.

An embodiment of the apparatus is illustrated in the accompanying drawings in which Figure 1 is a side elevation of a machine in the form of a reciprocating press for cutting. j I

Fig. 2 is an enlarged vertical sectional view, on the line 11-11,

. Fig. 3 is a horizontal sectionalview on the Fig. 4 is avertical "sectional view on the line TV-IV, Fig. 3. Fig. 5 is a view of a sheet cut into strips such as is done by the present mcthodand apparatus. I

Referring, to said drawings, the cutter comprises a pair of coacting cutting dies 12, 13, and preferablya plurality of such cutting dies comprising a pluralityof cutting edges. 152i, (Fig. 4) and constituting a socalled gang cutter.

The dies 12, 13 are mounted on stamping means whereby they arereciprocatcd toward and from one-another for cutting. and'for this purpose the one may be mounted on the bed .30 and the other on the reciprocating plunger 31 of a cran' l': prcss (Fig. 1).' The press has/a usual feed: ing means for intermittently feeding the blank endwise. the" feeding movements altcrnating with the cuttingstrokes.

The cutting edges of'the dies 12, 13, etc. are longer than the feed movement, so that 50, the successive cutsoverlapand form .a-conciprocation. and to cut less than the full tinuous cut. Thedies, are-preferably ar ranged to makea progressive cut at each re length of the cutting edges 15, 16-, etc; there- "of and thereby'in a simple manner-to avoid indentation by the corners of the dies of the,

(or eccentric) power vis', where the. wider cutters, will therefore be progressive along the edges 15.16, etc. of the dies, so that there will be simultaneous progressive, cutting of an interposed sheet.) The stroke of the plunger 31 and consequently the approach of the dies 12, 13 is, preferably so limited that the edges'15, 16, etc. do not cross at the limit of the dies, and cut less than throughout their entire length the approaching movement of consequently the sheet will be the full length of the edges-15, 16, etc. of

the dies. QonsequentIy' the sheet will not be dented by the corners 37 of the dies. (Fig. 3). The inclination of the face 35 is pref- ,erably slight, as thereby-the cut strip is not pressed downward by the movable die to any considerable extent outof the plane of the sheet or to'such an extent as'to receive a the limit of approach of the dies 12, 13 reached. The cutting of a sheet of metal or other material) interposed between the permanent bend or set. Also, by such slight inclination, less movement of the diesapart is required the edgesido not cross and. thereby a less stroke of the plunger 31 is required. The plunger 31 may thereby be given a very short stroke, and hence may bereciprocated at high sp'eedand the machine thereby enable'd to work rapidly.

The present apparatus and method have been particularly devised for thecrting of sheets into strips with scalloped of zigzag edges, which strips are in turn cut into round blanks or'into blanks of a similar nature where theblanks may be nested"on the sheet from'which they are to be cut, that portions of one strip in-' cluding two or more blanks may coincide with the narrower portions of the other strip. Such a cutting of a sheet and therelative position of the blanks is illustrated in 'Fig. 5.

For-cutting such strips, the cutters or cut- I to bring them to a position where g I led ioe

ting dies 12, 13,are provided with zig-zag {edges as shownrmost clearlyin Fig. 3. ,The

cutting edges 15- 24 are of less length than the sheet, and the sheet is cut from end to. end by a succession of cuts by 'thecutter's, and as heretofore explained the edges 15,16,

etc: are preferably somewhat longer thantl1eout to be made, and-the upper and lowercoactingbuttingfedges do not cross at one endm thereof and thereby do not cut entirely the length thereof. 7 n The cutting edges l5-24 have each the lengthyof a symmetrical part of the,zigzag line, and. hence make symmetrical "cuts at each successive cut. The contours of the successive cutters are similar but opposite,

each as compared with the next, as will be seen from looking at the edges 15 and 17 17 and I9, etc.,,Fig. 3. I q a After each cut the sheet is fed forward the necessary distance to enable the cutters to repeat the previouscut, and suitable means {10 for this purpose are preferably provided. For example, the sheet may be fed between "a pair of rollers 42, '43, WlfiCl'lland one-half blank is lost at theend of each alternate row, as will be seen in Fig. 5, and

consequentlyt egreaterthe number ofrows the'greater th number of half-blanks.

. Stripperplates 60, 61 maybe provided for pressing the stripsoutfrombe tween the dies as th dies move apart. 2

The method and the mode of procedure in carrying'out said method will be apparent fromthe foregoing description.

The apparatus may receive other embodi-' ments t an that herein specifically illustrated nd-des ribed.

.WhatIclaimis: k v 1s The method of cutting a metal sheet .lntoscalloped strips extending longitudinallyof the sheet, which comprises feeding the sheet lengthwise iiltermittently, and by tervenmg simultaneous shearing, cuts forming the opposite sides of'the reversedscallops ofpne laterral series, the successivecuts COIIICidIHg to cut the continuous strips.

2. The method of cutting metalsheets in'to scalloped, strips, comprising dividing by in; termittently and progressively shearing said 'sheet for a part of its length along a zigzag line, and feeding said sheet lengthwise of the strips being cut during'intermissions. to the cutting operations toprovide as a re;

. I geotace sult of a succession of the cuts. a complete cutand thereby a cut scalloped strip.

' 3. The method of cutting metal sheets into scalloped strips, comprising dividing by intermittently shearing said sheet for a part of its length along a zig-zag line, and feeding saidsheet'lengthwise of the strips being cut during intermissions to the cutting operations to provide as a result of a succession 3 bf the cuts a complete cutand, thereby, acut scalloped strip, and limiting the d1splacement of said strip by the cutting dies to an amount, less than will cause distortion. .4. The method of cutting metal sheets i into scalloped strips, comprising dividing by intermittently shearing said sheet for a part of its length along a plurality of zig-zag lines bya succession of simultaneous cuts,

,Fand feeding said sheet lengthwise of the strips being cut during inter-missions to the cutting operations to provide as aresult of a succession of the cuts aplurality of complete cuts and thereby a plurality of cut scalloped strips.

- 5. The inetho intogscalloped .strips,compris1ng dividing by d e f cutting metal sheets 'rogressfiely and intermittently shearingsiifd sheet for a part of its length along a "plurality of zig-zag lines by a succession of s multaneous cuts,) and feeding said sheet 'lengthwise of the stripsbeingcut during intermissions to the c tting operations to provide as 'a result 0 a succession of the cuts plurality of cut scalloped st'rips.

a plurality of complete cuts andthereby a scalloped strips, comprising dividing by. in.

termittently shearing saidsheet for a part of its length along a plurality of longitudinally extended zig-zag lines, foi; a succession of simultaneous cuts, and feeding said sheet during intermissions to g the cutting operations toprovide as a result of a succession of thecuts a plurality of complete cuts and thereby a plurality of cut scalloped strips,

said sheet being fed lengthwise. o

7 The method of cla m 1, further'charac terized that each of the successive cuts is longer t an the feed, so that the cuts overlap to form continuous cuts.

8. The method of claim 1', further characterized in that each of thesuccessive cuts islonger than the feed and the cuts are made of varying depths to form partial cuts at one end which are completed by the overlappmg of the next successive cuts.

" 9. A mahine for cutting a-metal sheet into scalloped strips extending-longitudinally of the, sheet, comprising opposed' shearing cut one sideof one scallop, and arranged to d es having cutting edges adapted each to simultaneously cut the reversed sides of'the v scallops of one lateral series, and alternatelyacting stamp ng and feeding means, the latter adapted for feeding the sheet endwise after each cutting stroke.

10. A cutter for dividing metal sheets,

comprising a reciprocating 'zig-Zag cutter adapted to make a plurality of cuts part way of the length of a sheet, and means for in termit-tently feeding said sheet leugthwiseto said cutter, whereby to provide as a result of a succession of said cuts a plurality of complete cuts and thereby a cut scalloped strip, said cutter comprising parts adapted to cross progressively lengthwise thereof and to thereby progressively cut;

115A cutter for dividing metal sheets, comprising a reciprocating zig-zag cutter adapted to make a cut part way of the lengthof asheet, and means for intermittently feeding said sheetlengthwise to said cutter, whereby to pnovide' as a result of a succession of said cuts a complete cut and thereby a cut scalloped strip, said cutter comprising a pair of cutting edges having an inclined relation to each other, whereby said edges cross progressively lengthwise thereof and have a progressive shearing action.

12. A cutter for dividing metal sheets, comprising a reciprocating z g-zag cutter adapted to make a out part way of the length of a sheet, and means for intermittently feeding said sheet lengthwise to said cutter,

whereby to provide as a result of-a succession of said cuts a complete cut and thereby a cut scalloped strip, said cutter comprising a pair of cutting edges having an inclined re-1 lation to each other, whereby said edges cross progressively lengthwise thereof and have a progressive shearing action, saidinclination. of said cutting edge being slight so thatthe metal will not be set or strained when carried beyond the meeting .points of the edges in the act of cutting. V

13. A cutter for dividing metal sheets, comprising a plurality of reciprocating zigzag cutters ada ted to make simultaneous cuts part way 0 the length of a sheet, and.v means for intermittently feeding said sheet lengthwise to said cutters, whereby to provide as a result of a succession of said cuts a plurality of complete cuts, and thereby a plurality of cut scalloped strips, said outters comprising a pair of cuttingdies and a reciprocating plunger carrying one of .said pairof dies. Y i

14. A cutter for dividing metal sheets,

comprising a plurality of reciprocating zigzag cutters adapted. to make simultaneous cuts part way of the length of a-sheet, and means for intermittently-feeding saidsheet lengthwise to -said cutters,whereby to prowide as a result of a succession ofsaid cuts a plurality of completecuts, and thereby a plurality of cat. scalloped strips, said cutwhereby .said edges cross progressively lengthwise thereof and have a progressive shearing action.

15. A cutter for dividing met-alsheets, comprising a reciprocating zig-zag cutter adapted to make a out part wayof the length ofa sheet, and means for intermittently'feeding' said sheet lengthwise to said cutter,

whereby to provide as a result ofa succession of said cuts a complete cutand thereby a cut scalloped strip, said cutter comprisingv inclined cutting edges adapted to cross progressively lengthwise thereof and to thereby progressively shear the sheet, and means for limiting the reciprocating movement of said cutting parts to an extent that when moved together a shearing cut less than the complete length'ofthe cutters is made.

1 16. A cutter for dividing metal sheets, comprising a plurality of reciprocating zigzag cutters adapted to make simultaneous cuts part way of'the length of av sheet, and

means for intermittently feeding said sheet lengthwise to said cutters, whereby to provide as a'result 'of a succession of said cuts,

a plurality of complete cuts, and thereby a plurality of cut scalloped strips, said cutters comprising a pair-of-cuttingdies and a're I ciprocating plunger carrying one of said pair of dies, the edges of said pair of dies having an inclined relation one to another, whereby said edges cross progressively lengthwise thereof and have a progressive shearing action, and means for limiting. the reciprocating movement of said plunger to an extent that when the cutters are moved together a out less thanthe complete length of shearing the cutters 1s made.

17. A. machine according to claim 9, fur-- ther characterized in that the'shearing dies have cutting edges long r than the feed.

strokes. 18. A machine according to claim 9, further characterized in that the shearing edges of'-the dies are relatively inclined to cut,

progressively from end-to end.

19. Av machine according to claim 9, fur-v ther characterized in that the'shearing edges of the dies are relatively inclined to out progressively from end to 'end and to cut only partly through at the advancing ends, the

stroke.

my name.

Inwi tness whereof, I ha ve hereunto signed o'r'ro s. Barns,

out being completed at the next succeeding 12c

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