US829277A - Punching-machine. - Google Patents

Description

No. 829,277. PATENTED'AUG. 21, 1906. W. B. MNQSAY.

PUNGHING MACHINE.

APPLXGATION rum 113.15. 1906.

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PUNGHING MACHINE.

APPLIOATIOK FILED JAN. 15. 1906.

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PATENTED AUG. 21, 1906. W. E. LINDSAY.

PUNGHING MACHINE. APPLICATION nun v.15. 1900.

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PUNOHING MACHINE.

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No. 829,277 PATENTBD AUG. 21, 1906.

W. E. LINDSAY. PUNCHING MACHINE.

APPLIOATIGN FILED JAN. 15, 1908.

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UNITED PATENT OFFICE.

lVILLlAM E. LINDSAY F BALTIMORE, MARYLAND, ASSIGNOR TO THE CROWN CORK & SEAL 00., OF BALTIMORE, MARYLAND.

PUNOHING-MAOHINE.

Specification of Letters Patent.

Patented Aug. 21, 1906.

To a whom. it may concern:

Be it known that I, WILLIAM E. Lmnsar, a citizen vof the United States, residing at Baltimore, Maryland, have invented certain new and useful Improvements inPunchin Machines, of which the following is a spec cation.

In the manufacture of articles from sheetmetal by cutting or punching therefrom disks or other forms to be struck up by dies to the desired sha s it is of material advantage to feed in the s sets of metal in such a. mannor that the forward ed e of the fresh sheet will abut against and foliow the trailing ed e of the sheet reviously fed in, this not on y saving time, l ut also reventing uneven wear on the cutting and is memhers, the latter advantage accruing because the dies in this way fin material to work upon thro hout their extent and the severe strain an uneven wear which would result from working on a blank whichcovered onlv part of the die being avoided. Such a method of feeding, however, necessarily reduces from the forward and rearward e ges of each sheet only partial or half blanks, and if these are immediately o )erated upon bv the dies a series of half articles are reduced which must be subsequently sorte from the complete articles. In order, therefore, to secure the advantages fiowin from the feeding of the sheets one after t e other with their adjacent edges substantially in contact and at the same time avoid the production of half articles or segmen ts of the complete articles I have devised an apparatus in which the half-blanks are cut from the meetin edges of the sheets before these portions 0 the sheets reach the dies or forming members, and when so cut the half blanks or disks are discharged from the machine into a separate receiver from that used for the completed articles,so that they do not corn mingle therewith and no subsequent sortmg lsneccssary.

The invention consists in the features, combination, and arrangem nt of arts hereinnfter described, and particular y pointed out in the claims.

in the accompanying drawings, Figure 1 Is a front view of a punchirig-machine emlu'ulymg my invention. Fig. 2 is a side view of said machine. Fig. 3 is a plan view of the lower portion of the machine in the plane of the die-plate. Fig. 4 is a detail sectional dies with spring resserpins.

view from front to rear throu 11 the feeding and cutting and punching mec anism, arts being shown in elevation. Fig. 5 is e etail view of the intermittent driving connections for the on tting mechanism for the half-blanks. Fig. 6 is a etail view of the clutch-gear. Fi 7 is a detail sectional view of the ratchet an its cam for timing the actions of the halfblsnk-cuttin mechanism, and Fig. 8 is a side view of t e ratchet-wheel. F1 9 is a detail view of the cam for control ing the clutch-pin of the driving connections leading to the cutting devices for the half-blanks. Fig. 10 is a detail view of a part of the supplemental cross-head and the half-bhla nk cutting i 11 is a detail side view 0 a spring. 1%. is a detail a view of the same. Fig. 13 is an end view 0 the clutch-block. I4 is a detail viewof the ring, and Fig. 15 1s a detail view of the clutch-pin.

The machine comprises a. series of plunegers 1, mounted in a complex cross-head 2,

which is vertically reciprocated within the housing 3 by connections of any suitable form operated from the main shaft 4, having the 5 -wheel 5 thereon and operated in any suite is manner.

The plungers carry a series of dies in staggored relation to each other, their relative positions being the same as that of the fixed ies, (indicated generall in Fig. 3 at 6,) slotehiy supported in the ower part 7 of the mam frame, as indicated in Fig. 4.

To the dies 6 and beneath the dies carried by the plunge-rs the sheets of material are fed with their ed es in contact, as above indisated. This ceding action is accomplished in the manner disclosed in Letters Patent of theUnited States granted to William Painter, No. 605,334, June 7, 1898, as will now be briefly referred to. The sheets of material from which the articles are to he made are placed by the attendant. on the table 8, each with its rear or following edge against the gage 9 and with its side mrtlons or margins overlyin the feed-hon s 10, which pass around t m pulleys or wheels 1 l utlhc from. of the machine and about the pulleys 12 at the rear, said rear pulleys being on a shaft 13, rotating in hearings in the frame and operated through suitable uuwlumlsm hereinafter referred to.

The margins of the shoot placed against the gage 9 overlie the bands and the sheetfeeding studs 14 carried thereby, and the feeding action of the sheets takes place when these studs carried by the bands are brought beneath the socket-punches 15, which thendescend and force the overlying metal down around the feeding-studs, so.that the sheet will now be carried along with the feed-studs and the bands to the cutting and die members, and, as above indicated, the onward movement of the fresh sheet begins as soon as the edge of the sheet just previously fed and now being acted on is moved rearward a sufficient distance to bring its trailing edge i 5 to the forward edge of the fresh sheet.

The socket-punches depend from brackets 16, attached to the cross-head 2, by which the said socket-punches receive their vertical movements. The socket-punches, it will be understood, While reciprocating in unison with the cross-head are not effective in their action until the feed-studs get in position be neath them, whereupon'they act to unite the metal sheet with its feed-studs for conveying 2 5 [the sheet through the machine. As before stated, .the action of the dies in the machine ilas o erated heretofore would produce half artic es by reason of the fact that the partial iblanks, or what I have termed for conven- 3oi ienoe half-blanks, cut out from the meeting edges of the metal sheets were acted on by iithe dies, and these half articles were then disicharged into the same receptacle or at the ibame point with the complete articles. In l'order to avoid the formation of these half ar- Eticles and to at once eliminate the half-blanks from further attention or consideration in the carryin on of the work, I have provided a series 0 cutters at a point in front of the position of the die members for cutting out the half-blanks from the adjacent edges of the sheets of metal and for causing their immediate discharge from the machine into a separate lot from the completed articles. These half-blank cutters comprise a series of fixed cutters 17 and a cooperating series of movable cutters 18, carried by a supplemental cross-head 19, working vertically in guides formed in brackets 20, attached to the housing 3. The cross-head is reoiprocated by the eccentric-rods 21, depending from straps 22, surrounding eccentrics 23 on a supplemental shaft 24, having its hearings in brackets 25, formed. with or attached to the housing. This shaft is driven intermittingly and only when'the joint or the meeting edges of the sheet being operated upon by the dies and that freshly fed are brought below the halfblank cutters 18.

In the machine as at present organized the actions of the half-crown cutters occur at in tervals e ual to eighteen strokes of the die cross-hes; 1; but of course this interval depends entirely upon the length of the sheet and the number of die actions necessary to utilize the stock to the maximum extent.

When the half-blank cutters operate, the forward edge of the fresh sheet and the adja cent trailing edge of the previously-fed sheet} are cut out and the half-disks fall through the openings 17 through the framework beneath. The fixed cutters are thus prevented from passing to the dies. They are collected in any suitable receptacle, and n o sorti ng of half-crowns .fro 1n complete.,.crowns is neces 7 5 sary, as has bcenthe case heretofore.

\Vhcn the sheets of metal just mentioned reach the dies in their passage through the machine, the dies will work idly through the spaces in the meeting ed es of the sheets left by cutting out the half-b anks therefrom.

Returning now to the mechanism for driving the supplemental shaft 24 intermittingly and referring particularly to Figs. 1 and 5, itwill be seen that there is a gear-wheel 26 on 8 5 the shaft 24 just outside the housing. This gearwheel is loose on the shaft 24 and is rotated constantly in the direction of the arrow by a gearwheel 27 on the main shaft 4.

Alongside the loose car 26 a clutch-block 28 9o 7 is keyed on the she t, which block carries a clutch-pin 29, having a notch 30 on one edge ada ted to receive and pass alon a segment 31, iiaving an inclined face 32 an carried by a stem or shank 33, movable vertically in a supplemental housing 34, secured to the main housing at 35 in any suitable manner. This segment is pressed downwardly to lie with its cam-face or incline 32 in the path of the clutch-pin by means of a spring 36, lo cated in a socket 37 in the stem of the segment, the upper end of the spring being held by a pin 38, depending from the arm 39 of the supplemental housing. When in its depressed position, the segment will by presenting its inclined face to the notch of the clutch-pin cause the said clutch-pin to be retracted from its engagement with the r0- tating gear-wheel 26, and thus the shaft 24 will be disconnected from the driving power and will come to rest with the supplemental cross-head and the half-blank cutters in raised position. The stop ing of the shaft 24 in proper position is due a so to the action of the brake-band 40, surrounding the clutchblock and having its ends attached to the supplemental housing, for instance, at the point 40*.

At the proper periods in the operation of the machine the clutchin is released from 12 the segment 31 by the 'fting of the latter, and the pin then under the action of the leafspring 41 bearing on its end will be, thrown into engagement with the constantly-rotating gear-wheel 26, or, more accurately speaking, with a shoulder or pin 26 thereon, and the clutch-block and shaft 24 will immediately be set in motion and will perform only one revolution, this, however, being sullieicnt to cause the halt-blank cutters to perform their function by cutting out the hall"- blanks at the meeting edges of the metal isheets. The motion of the shaft 24 is lll|l ited to one revolution, because the segment B1 is so controlled that after releasing the 'clutch-pin it falls again into the path of the v aid clutch-pin, so that as the shaft is completing its one revolution the clutcltpin by engaging with the incline or camdace of the segment will be retracted from the gear- Whcel, and the shaft will thus come to rest with the cutters raised.

For controlling the segment or cam 31 I emplov in addition to the spring 36 for forcing it down a timing-wheel for raising the segment from engagement with the clutch-pin, said timing-wheel consisting of a ratchetwhecl 42, supported to turn independently of the shaft 24. This ratcl1etwheel has a cam portion 43 thereon arranged to act at each complete revolution of the ratchet-wheel upon a roller or pin 44, pro'ecting from the stem of the segment, where y at each revolution of the ratchet-wheel the cam-segment is lifted to release the clutch-pin. The cam portion of the ratchct whcel is of a length equal substantially to the distance between twoteeth, so that the said'cam will after raising the segment almost immediately pass from beneath the roller or pin and allow the segment to fall into position to retract the clutch-pin when it is rought around by the revolution of the shaft 24.

The spring 41 is secured to the clutchblock at 45 and is perforated at 46 to fit about the shaft 24. The cl u tch-pin moves in a WEI-ii or roove in the clutch-block, wherein it is hel by a ring 46*, fitted to the exterior of the clutch-block and secured in place by a screw at 47 The timing ratchet-wheel is held under frictional restraint so as not to overthrow when moved by its pawl, for which purpose arms 48, supported from a bracket 48 on the su plemental housing and depending on each si e of the timing-ratchet, have leather brakepieces 49 to bear on the said ratchet, the pressure being regulated by a spring on a bolt 50 passing through the arms and having a nut 50, by which the pressure of the spring may be regulated, the opposite end of the bolt being connected to one of the depending arms.

The timingratchet is driven step by step bya pawl 51, pivoted to an arm 52, journaled at 53 and operated by a rod 54, extending and connected to a clip 55 on the link 56. This link forms a part of the operating connections for driving the rear pulleys 0r Wheels 12 before mentioned for moving the feed-bands. This link is coupled to a vibrating arm 56*, pivoted to the main housing of the machine and operated by a sliding block 57, swiveled on the pin of the crank 58 on the main shalt 4. The lower end ol the link is connected to an arm 59 of a rock-shalt (30,having another arm ()1 connected by a link 62 to a pawl-lever 53, carrying a pawl (34, engaging a ratchetwhecl (35 on the shaft 13. It will thus be seen that the eccentric-shaft 24 is driven intcrmittingl from the same connections which are employed {or operating the feed mcchanisn'i of the machine.

At 64 a headdate is shown located ad'acent the cutters l or the hi.i.ll blanl sx Un or this head-plate the forward end of the fresh metal sheet is placed by the attendant when feeding the machine. This head-plate aids in holding the sheet-metal plate in proper position to be cut by the half-blank cutters. The plate is perforated for the passe c of the movable cutters. It is supporte by its edges, and its middle portion is depressed to engage and hold the forward end of the newly-fed sheet-metal late at the moment the cutting is done. or this ur ose the supplemental cross-head is provide with a series of pins 66, adjacent the cutters carriedby the said crosshead, and these pins engage and force down the head-plate just previous to the contact of the movable cutters with the sheet-metal plate. The pins are pressed downwardly by springs 67, arranged in sock ets in the supplemental cross-head, and thus said pins are permitted to yield upwardl when the head-plate has been pressed down sufficiently.

he eliminating of the half-blanks takes place from the forward and trailing edges of each sheet, and in this my invention broadly consists without regard to the specific manner of feeding the sheets or the specific relation of the newlyfed sheet to that passing through the machine, and, further, the broa feature of 111}'i!1\611bl011 concerning, as it does, the elimination of the half-blanks from the complete ones does not call into account the exact relation of the die or forming operation to the half-blank-cutting operation, although in the present embodiment of my invention the die or forming operation takes place in the same machine with the half-blank cuttin and immediately in rear of the position of the half-blank cutters.

I clairn 1. In a machine of the class described, the combination of main punching devices, and meaans 1for punching out the parltiatlr blan ks W DQ EQSQIEIM r m t B compete blanks ithe c ornplnte ar ti c les formed tlTerel rom fthe iiiain punchingqevics olpefiltirigidlf in the openings formed by t 10 partial-blank-punching means, substantially as described.

2. In a machine of the class described, the combination of main punching devices, means for punching out the partial blanks in the openings and delivering the same separately from the complete blanks or the articles formed there from, and timing means for operating the ipartial-blank-pimching means after a certain tgiumber of operations of the mam punching devices have taken place, the main punching devices operating idly in the openings formed by the partial-blank-puncliing means, substantially as described.

3. In a machine of the class described, the combination of punching devices, means for punching out the partial blanks and delivering the same separately from the complete blanks or the articles formed therefrom and means for feeding the material with the trailing edge of the sheet previously fed in whereby the partial blanks will be cut out and delivered from the adjacent. edges of the sheets before reaching the main punches, substantially as described.

4. In combination in a machine of the class described, main punches, partial-blank punches, means for feeding the sheets with their edges adjacent, means for operating the main punches to utilize the stock throughout the body of the sheets and timing means for operating the partial-blank punches when the meeting edges of the sheets are brought below the same, substantially as described.

5. In combination in a. machine of the class described, main punching and die mech; out complete witnessed for nnng the artic le s therefrom and partial- Hlank punches for cutting out the partial blanks from the edges of the sheet.

In combination in a machine of the class described, the main punches, a reciproeating cross-head carrying the same, partial blank punches, a supplemental cross-head carrying the same, and timing means for operating the supplemental cross-head at inter- 4f ifvals in respect to the operation of the main. "cross-head, said main punches operating idly formed by the partial-blank punches, substantiall as described In combination in a machine of the class described the main punches, partialblank punches, the cross-shaft 24, a crosspartial-lilai'ik stantiall head operated from said shaft and means for driving the said shaft intermittingly, said main punches operating idly in the o 'ienings formed by the partial-blank punches, sub- :is described.

combination in a machine of the class described the main punches, partialblank punches, the cross-shaft 24, a crossl] ad operated from said shaft and means for driving the said shaft intermittingly, said means including the constaiitly-rotating member, the elutch-block on the shaft, a pin thereby to engage the constantly-rolatmg member, and means for controlling thesaid elutch-pin including a ti1ningratchetwheel and the camsegment, substantially as described.

5). ln combiinition in a machine of the class described, main punches, partial-blank punches, feeding means for the sheets of Inaterial, eonnectioi'is thereto from the main shaft of the machine, timing means for operat ing the partial-blank punches and connections for operating the same from the feed connections, said main punches operating idly in the opei'iings formed by the partialblank punches, substantially as described.

10. In combination in a machine of the class described, main punches, partial-blank punches, timing mechanismfor operating the punches includinga constantlyrotating member, a slow-motion member, a clutch and means for controlling the clutch from the slow-motion member, substantially as described.

11. In ((HllhillflljiOI], in an organization of the class described, the combination of means for feeding the sheets with their edges adjacent and means for cutting half-blanks from the said adjacent edges and delivering the same without shaping them, substantially as desm-ibed.

In testimony whereof I affix my signature in presence of two witnesses.

VILLIAM E. LINDSAY.

it nesscs: Cnas. I]. ,KOPPELMAN,

LEW. GREENFIELI).

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