US1725584A - Press tool for punching and stamping sheet metal and the like - Google Patents

Description

Aug. 20, 1929. F. HUMPHRIS' PRESS TOOL FOR PUNCHING AND STAMPING SHEET METAL AND THE LIKE Filed NOV. 18, 1925 4 Sheets-Sheet 1 4 Sheets-Sheet 2,

F. HUMPHRIS Filed NOV. 18, 1926 lawn-2m. El c V c 5y ATTOP/VE Y hI-JH QJFanE PRESS TOOL FOR PUNCHING AND STAMPING SHEET METAL AND THE LIKE Aug. 20, 1929.

' Aug. 20, 1929. F. HUMPHRIS PRESS'TOOL FOR PUNCHING AND STAMPING SHEET METAL AND THE LIKE Filed Nov. 18, 1926 4 Sheets-Sheet a wvs/vrm 4 1929- F. HUMPHRIS 1,725,584

PRESS TOOL FOR PUNCHING AND STAMPING SHEET METAL AND THE LIKE Filed Nov. 18, 1926 4 Sheets-Sheet 4 Fi .2 I W- bf m '1'? b FMLSQ. ac

Patented Aug. 20, i929.

PATENT oFF cE.

FRANK HUMPHRIS, OF PARKSTONE, ENGLAND.

PRESS Toot. EoE'ruNcHme AND STAMPING SHEET METAL AND 'I'IEELIKE.

Application filed November 18, 1926, Serial No. 149,172, and in Great Britain November 26, 1925.

This invention consists of improvements in and relating to press-tools for punching and stamping sheet-metal and the like and comprises one or more blanking-dies and one or more punches and so-called die-punches and So-called punch-dies together with their die-carrying and punch-carrying-plates or holders, this invention includes their mode of arrangement and their parts, their opera tion and also the construction of the Said press-tools, but whatever mode of arrangement is employed in press-tools made according to this invention, there is preferably used for producing each article thereby, one blanking-die, in which or with which there is provided a punch, hereinafter called the die-punch, and to coaet with the said blanking-die and die-punch there is provided on a punch-carrying-plate or holder, one punch in which there is also provided a die, hereinafter called the punch-die.

According to this invention there is embodied in each article-producing press-toolcombination, irrespective of whether such is employed singly in a press or like machine, or whether two or more press-tool-combinations are employed and arrangedin sets, or in gangs, what may be described as a combined punch-and-die which serves to coact with a combined die-and-punch at one and the same time, in such a manner that the blanking or punching from a sheet of metal or material and also the stamping, raising, folding, curling or bending as well as the ejecting of one or several finished-articles, as the case may be, from the so-called presstools or tool, is accomplished at each reciprocative or operative-stroke of a press or other machine in which one or more of the said press-tool-combinations are mounted, in addition the said press-tool-combinations are arranged so that they will eject one or several finished-articles, as the case may be, without passing the said article or articles back through the hole or holes or perforation or perforations in the sheet or stock from which it has or they have been out, and therefore stock can be fed between what is hereinafter described as the above-stock and the belowstock members of the said press-tools when these have only a very small daylight or gap between them. According to this inven* tion all finished-articles are ejected mechanically into channel-ways or conduits provided in some of the parts or members of the below-stock press-tools for conveying the finished-articles out of the press or other machine in which the said press-tool-combination or combinations is or are mounted. To ensure the finished-articles being mechanically ejected there is provided according to this invention above-stock and invention it is necessary to define t e relative positions of the die-and-punch members employed which coact one with the other, also how the so-called stripper-plate or its equivalent and the die-carrying-plate or its equivalent and the punch-carrying-plate or holders or the like equivalents therefor are incorporated in, or are arranged to operate in conjunction with the punching,

blanking, raising, forming and bend1ng-.

members of the said press-tools and so as to make this more easily understood it should be observed that all or any members of the said press-tools, made according to this invention, which are located above that face of a sheet, plate or other stock, in a press or other machine, or on the ram-side thereof,

will for such location purposes, be hereinafter referred to as above stock-members,

and any or all of the members of the said press-tools, made according to this invention, which are located below that face of a sheet, plate or other stock oron the bolster-side thereof, will for such location purposes, be hereinafter referred to as below-stock-members, and the description above-Stock-members and below-stock-members will be used hereinafter.

When producing articles by the presstools made according to this invention, it

will be necessary in many cases to vary the form of, or placement of some of the compone'nt-parts thereof so as to enable the manufacture of different kinds and sha es of articles to take place; but for simplicity the invention will now be described and illustrated as it is applied in the production of 'acupped or drawn article, which are cutout from sheet-metal and finished in one operation, preferabl inrows and nearly across one way of the-s act, or" so "as to cut] and finisha row of nails or articles at "each ogierative stroke'of the -press" or other c other" kindsof 'articles produced- "ole are as follows::-

either onetat a time or'several atoneand.

cording V n; t e accompanying drawi g to, this invention. a-

in which there is -a"punch-die, coacts with a below-stock blankingdie and "cutsfout a blank;from sheet stock ;and how='this blank just after ithasibeen cutout is: held firml against. me 3 of the above stock punc by below-stock ejectors which are mounted in aresilient manner and so as to slide imthe below-stock die p'unch or drawingt. -.J Thegoperations to pirgduoe a fims ed artibeen out froxnthe stockis held firmly against the cuttingliorhlanking-face of the abovestock-punc until thesaid blank makes con- -,,tact with the below-stock die.- unch and between the forming faces of w ich and those provided in the above-stock punch-diethe said 'blankis bent, crinkled, raised and/or embossed so as to produce a finished article,

but it should be observed that whilst the blanking of the stock, the bending of the blank and the-finishing and alsothe ejecting of a finished article from the formin faces of the press-tools take lace,the stoc from as been cut, to pre vent distortion thereof, is pressed onto the belo -stock"blanking-die by an above-stock spri g-actuated stripper, which not 0mg strips the stock from the above-stock-punc but also serves as a pressure-plate, and the below-stock blanking-die or the pressureplate,' or both, are optionallyg'lovided with points, sharp ridges, or protu ating parts a which arearranged to be close to the cuttingedges of thesaid blanking-die or to be close to the hole the pressure-plate throu h.

which theabove-stock blanking-punch sli es as the case may be, and inth1s blankingl punch above-stockeje'ctors are provided to efiect finished articles out from the punch-die t erein; Figure 2 is a viewillustrating. one position that the'above-stock-punch with the ejectors therein and the blank, all of which are shown in Figure 1, take as they move towards the below-stock die-punch; this view also shows 6 how the below-st0ck eject0rs slide or are movedinto the below-stockdie-punch or lorifitudlnitlly fllilded, creased or curled na and same. time by: the niadef'ac-f? ve stock punch,

e blank after it has-'- drawing-post before the forming of the;

blank into an article takes place." .This view he clearly shows the blankin co'ntact with the in- Figures 1 and 2, are constrained to take after the blank has been forced around and into the below-stock die-punch, and thus formed, or bent, or crinkled and/or embossed into afinishedarticle.

i. Figure 4 is aview illustratin theposition ,thatthe. above-stock-punch an the ejectors -;]therein and the above-stock stri per-and: p -pressure-plate andthe below-stoc -ej'ectors Figure 1 ISENIQWTM'HEH sect1on 1llus tratin how one'form of a shown inFigures 1, 2 and 3, after an article has beeuproduced, return to, to enable the shown in: this view ready fora repetition operation to occur, this view also shows how the below-stock-ejectors eject a finished-ar ticle from out of and oil the below-stock die-punch or drawing- 0st into a chute through which the sai article falls, this view also shows the position' that the abovestock-ejectors take in the punch-die, after theyhave ejected the finished-article out of the said punch-die. In this view the crosssectional form of a folded-nail is shown and illustrates how a folded-nail is ejected -by the .below-stock-ejectors intoi the channelway or chute.

Figure 5 is a view partly in section illustrating how another form of above-stockpunch, in which there is a punch-die, coacts with a below-stock blanking-die and cuts out stock'to beefed forward into the position as I a blank from sheebstock, by first cutting one edge of the said blank and then cutting the ends thereof shearwise and finally severing.

the said blank from the stock by cutting the other edge thereof. This view also illustrates how thisblank is held firmly against the face of the above stock-punch by the below-stock ejectors, which are mounted in a resilient manner so as to slide in the belowstock die-punch or drawing-post. Operations of a like kind to thosedescribed with reference to Figure 1 of the drawings for producing a finished article are employed.

Figure 6 is a view illustrating the posi-.

tion of the above-stock-punch and the ejec- .tors therein as the above-stock punch and punch-die commences to bend the blank partly on and into the below-stock die-punch.

Figure 7 is a view illustrating the position that the above-stock-punch and the ejectors therein and the below-stock-ejectors shown in Figures 5 and 6, are constrained to take after the blank has been forced around and into the below-stock die-punch and thus formed, or bent, or crinkled and/or embossed into a finished article.

Figure 8 is a view illustrating the position that the above-stock-punch and the ejectors -to be fed forward in a like manner and for the other purposes as described with reference to Figure 4 of the drawings. In this view the cross-sectional-form of a foldednail is shown and illustrates how a foldednail is ejected by the .below-stock-ejectors into the channel-way or chute.

Figure 9 is a view partly in section illustrating how still .another form of abovestock-punch, in which there is, a punch-die, coacts with a below-stock blanking die just before it cuts out a blank from'sheet-stock and how this blank after it is out out will be held firmly against the face of the abovestock-punch by the below-stock ejectors in alike manner and for the other purposes as described with reference to Figure 1 of the drawings.

Figure 10 is-a view illustrating the posii tion that the above-stock-punch with the ejectors therein and the blank all of which are shown in Figure 9 take when the blank is in contact with the below-stock die-punch and the below-stock ejectors and before it is bent or formed into a finished article.

Figure 11 is a view illustratingthe position that the above-stock-punch and the ejectors therein and the below-stock-ejectors shown in Figures 9 and 10 are constrained to take after the blank has been forced around the below-stock die-punch and thus formed, or bent, or crinkled and/or embossed into a finished article.

Figure 12 is a view illustrating the position that the above-stock-punch and the ejectors therein, the above-stock stripper-andpressure-plate and the below-'stock-ejectors, shown in Figures 9, 10 and 11, after an article has been produced, return to, to enable the stock to be fed forward in a like manner and for the other purposes as described with reference to Figure 4 of the drawings. In this view the cross-sectional form of a foldednail is shown and illustrates how a foldednail is ejected by the below-stock ejectors into the channel-way or chute.

Figure 13 is a bross-sectional-view showing two of a set' of article-producing press-tooL combinations, which with others of the same kind are mounted side by side in a press or other machine and arranged in a two-row form of placement, or aatwo gangs, or sets, and in which the coacting dies-and-punches and the parts which are'only partly illustrated in Figures 1 to 4 are employed and these when they are arranged as shown in this view, are capable of producingtwo rowsof finished-articles from a sheet of metal or material at each operative-stroke of a press or other machine in which they are mounted. In this form of carrying the invention into effect different shapes or patterns of blanking-dies may be used and may be made sectional or otherwise and secured in any known manner to the below-stock punch-holderplate.

Figure 14.- is a side-elevational-view partly in section of some of the article-producing press-tool-combinations of the kind shown in Figure 13, and illustrates the form of place ment of the above-stock-punches and of the below-stock die-punches'and of the channel ways or chutes.

v Figure 15 is an enlarged view partly in section of one below-stock punch-holderplate and one blanking-die, of the kind shown in Figures 13 and 14, and illustrates clearly how the below-stock-ejectors are slidably and resiliently-mounted so that they will slide and also operate in the below-stock die-punch and eject a finished-article into the channel-way or chute.

Figure 16 is a plan-view partly in section of some of the parts shown in Figures 13 and 14, and illustrates how the below-stock blanking-dies are arranged in their form of placement and are secured to the below-stock punch-holder-plate and how the above-stockpunches are arranged and also guided in the above-stock stripper-and-pressure-plate. v

Figure 17 is a plan view of the below-stock blanking-dies, of the kind shown in crosssection in Figures 1 to 12. It will be obvious that the contour of the cutting-edges of these dies may be given different shapes to suit the form of blank they are designed. to out, which is simple as they are ecctional-dies.

Figure 18 is an enlarged view in perspective showing one ofthe hal'f die-blocks of a modified form of below-stock"blanking-die of the kind employed in the 'PI'QSSJZQOl-COIH- binat'ion shown in Figure 20 and illustrates how the below-stook-ejectors project through and slide in slots in the below-stock diepunch. This view shows how protuberatingpoints are provided near the cutting-edges of the below-stock blanking-die so as to in dent the stock, local to the edge thereof which is being out, these prevent the stock from stretching or distorting whilst the cutting of a blank takes place.

Figure 19 is a part-sectional-view illustrating how the below-stocle-ejectors, of the kind used in the three-piece below-stockpunch of the press-tool-combination shown low-stock spring-actuated die-carrying-plate which retrocedes when depressed by the strong spring-effort of the above-stock spring-actuated pressure-plate in such 'a manner that the above-stock-punch cuts out a blank from the stock and folds it into a finished article around the below-stockpunchfrom which it is ejected by the ejectors into the channel-way or chute.

Figure 21 is a cross-sectio'nal-view showing another modified form of one, or of one of a set, or gang of article-producing presstool-combinations in which a below-stock spring-operated stri per-plate is caused to retrocede b the a eve-stock blanking-die before blan 'ng takes place.- In operation the belowstock-p'unch, firstly cuts a blank into the above-stock blanking-die, and lastly bends or forms it between the faces of the above-stock die-punch and the faces of the below-stock punch-die in such a manner that a finished-article results, after which the moving-parts of this modified-form-of articlereducing press-tool-combination return to he positions'illustrated in-th1s View;

., but during this return movement, the below stock ejectors which are mounted and also secured in and also move with the belowstock stripper-plate, eject any finished-uttcle that has been produced by and between the die and punch members out of the' die- 7 cavity in the below-stock-punch, and the the channel-way or chute.

above-stoek-ejectors also eject it from out of the above-stock blankin -die-cavity and away from the above-stoc die-punch into Figure 22 is an enlargedview in perspective of a part of an above-stock punch, and clearly shows the punch-die therein, this above-stock-punch is shown in-cross-section in Figures 9 to 12 and in Figure 20, this view illustrates clearly the cutting-face of the said punch, the p'unch-die-cavityand also the perforations in which the abovestock-ejectors, used in this form of punchdie, slide plunger-wise. I

Figure 23. is an enlarged view in perspecart of a below-stock die-punch,

slots'therein in which the below. stock-ejectors slide and by which they aregiiided. v

v Figure 24 is an enlarged view -1n perspective ofa art of a three-piece below-stock punclian punch-die, of the kind shown in cross-section in Figures 19 and 21; this view illustrates'th'e form of placement of the component-part-s thereof ahd how one blade which servesto shear or cut one of the edges of the blank is provided with slots which are located below the cutting-edge of this blade, this view also illustrates how the centreplate of this three-piece below-stock-punch is provided with slots which are arran ed to communicate with, or open into the ieform of die-punch, slide plunger-wise.

Figure 26 is a view partly in section illustrating how a more complex form of above stock-punch in which there is provided forming and embossing dies, is constructed so as to have two cutting-faces one for blanking from the stock and one for piercing the blank, and a drawing member for drawing and cupping the part piercing out from the larger blank, the said above stock punch 00- acts with a below-stock blankin -die to cut out a blank and also with elow-stock s ring-actuated ejectors for carrying the b ank on to a below-stock die-punch or drawing-post in which there is provided two drawing dies and a piercing-punch and faces for forming and embossing the blank into a finished-article in a single-action, after which the said'article is ejected by the ejectors into a a channel-way or chute at the side of the below-stock die-punch. Operations of alike kind to those described with reference to Figure 1 for producing a finished article are employed. a

Figure 27 is a view partly in section illustrating the position that the punch, diemembers and ejectors shown in Figure 26 take'when an article is finally formed. This view shows a small cup roduced at the same time and how the said cup is ejected through a hole in the below-stock die-punch or drawing-post.

Figure 28* is a view partly in section illustrating the punch and die members and ejectors in the position to which they return before commencing to blank the stock. In this view the cross-sectional form of a finished article is shown as -'it is being ejected by the ejectors into the channel-way or chute.

Figure 29 is a part sectional plan view taken on the line A, B Figure 27 and shows clearly the position of the channel-way or chute at the side of the below-stock diepunch or drawing-post and the arrangement of theejectors.

Figure 30 is a side elevational-view of a forked below-stock ejector of the. kind emas shown in Figure 26.

Figure 32 is a perspective view showing a made up of pieces which are attached by.

bolts, screws or the like either directly or indirectly, to the ram m or the bolster s (Figures 13, 14, 20 and 21) of a press or other: machine. In the simplest form of carrying this invention into effect Figures 1 to 12 of the drawings illustrate parts of w some of the members of the press-tools used in this invention to give a clear understand ing as to how the operations of producing an article are accomplished, and show an above-stock-punch a] in the face of which is formed an above-stock-die a in the above-- 3 stock-punch 0) there is preferably a minimum of two above-stock-ejectors nwhich slide in holes or perforations a Figures 22 and 25. In Figure l of the drawings the above-stockpunch a is shown in its position after having just cut a blank to from a piece of stock '0 by coacting with the blanking-die 0, this view shows the below-stock-cjectors twhich are located so as to operate at, or in one side of the below-stock blanking-die a, which below stock-ejectors t are slidably-niounted in the below-stock-punch-plate d and actuated by a spring 23 in such a manner as to hold the said blank or against the blankingface of the above-stock-punch (.1 until it has been carried on to the below-stock die-punch g. The above-stock-punch w is connected through the medium of a holder or holderplate a1 and screws or the like (0 (Figures 13 and 11) to an above-stock plate 1" which is preferably mounted to the ram m of the press or other machine. As the above-stockpunch a is moved towards the base-plate is of the press-tools or towards the bolster s of a press or other machine it slides in and is guided by a hole I) in the above-stock stripper-andpressure-plate b which is actuated by springs b so that the said pressureplate 6 can deliver pressure on the stock v. The below-stock-ejectors t which hold the blank w, slide in the belowstock die-punch g and in a hole d (Figure 15) provided in the below-stock die-carr ing and punch holder-plate d in which there is provided a spring 25 for actuating the ejectors z? and an adjusting-screw d for giving the desired compression to the said spring t \Vhen a blank w has been forced around and into the die-cavities g of the below-stock diepunch g by the above-stock-punch an as shown [in Figure 3 of the drawings it is formed into an article aand this view illustrates how the blank to, which has been carried by and between the spring-actuated below-stock-ejectors 25 and the above-stockpunch a on to the'below-stock die-punch g,

is given a sinuous outline in cross-section and how the said blank w is changed into an article as, after which operation the above stock-punch a recedes from the'below-stock die-punch g, and the below-stock-ejectors t constrained by their actuating-springs t follow the above-stock-punch a: and eject the finished article .70, as is shown clearly in cross-section in Figure 4 of thedrawings, into the channel-way or chuteit without passing the said article at back through the stock 1), and the said stripper-plate 1) strips the stock '0 off the above-stock-punch a.

It will be obvious that various articles can be produced by altering the shape of the forming and cutting-faces of the members of the press-tools thesubject of this invention, this is illustrated by way of example in Figures 1 to 12 of the drawings. In Figure 5 of the drawings a modification is illustrated in which a blank 10 is cut firstly along one edge thereof and then along the ends thereof and finally the blank w is cut or severed from the stock 0 along the other edge thereof, this method of cutting the blank to is advantageous particularly when forming an article as shown in cross-section in Figures 7 and 8 ofthe drawings; but the means for bending and forming are similar to those shown in Figure 3 and 4 of the drawings, as is also the operation of the press-tools. Figure 9 of the drawings illustrates an above-stock-punch a in the face of which there is formed a single-die cavity a which coacts with a below-stock diepunch g; this view shows the above-stockpunch w before it has cut out a blank wi; but but it should be observed that the belowstock-ejectors t are so arranged that they do not make contact with the stock t: at an time, but only with the blank w to hold it against the blanking-face of the above-stockpunch a immediately the said blank w is begins to move away from the below-stock die-punch g.

In the most simple form of carrying this invention into effect and where a large output of similar articles at a rapid rate is desired, particularly when the said articles are made from thin sheets of metal or material, the press-tools the subject of this invention are then embodied and assembled in a mariner like or similar to the example shown inFigure 13 of the drawings, which illustrates how the component-parts of vthe press-tools which are only partly shown in Figures 1 to 12 of the drawings are pref- .5 erably assembled to give them rigidity, on

so -called top :and bottom punch and die- -bases, oron an above-stock-plate r and a below-stock base-plate k, which in either case are provided directly or indirectly through other members with guides or guidepins d? or the likeand the whole assembly is preferably arranged so as to have one or more sets or gangs of press-tools located in a form ofplacement either as one row, or 1:: as two or more rows side-by-side so that they will cut out and produce from sheets of metal or material several articles .a:.or the like in one or more row-s at each operative-stroke of a press or other machine in 2p":which,the said press-tools are mounted.

It has been found advantageous to as semble the press-tools, the subject of this invention, so as to have a form of placement which permits them to be arranged in a frame or on holders or plates sub-presswise so that the whole assembly thereof can [be removed from or placed into a press or other machine or between the ram and bolster thereof or the equivalents therefor without 3 having to dismantle the component-pieces comprised in the press-tools, the subject of this invention; but it is to be understood that such is not an essential but only an advantage as the above-stock-members may be secured to the ram of a press or other machine and the below-stock-members may be secured to the bolster of a, press or other machine, and the guiding to ensure that the members of the press-tools will coact correctly may be done either by guide-pinssuch as (Z (Figure 13) or pins or bolts such as e or f (Figures 20, 21) which are either held or slide in bosses or lugs such as d, b, e, or, f, as the case may be or they may be guided by the guides provided for the ram of the press or other machine in which they are mounted.

The 'below-stock-ejectors t are, in the examples illustrated in Figures 1 to 15 0f the 60 drawings, actuated by relatively weak springs t to ,those which actuate indirectly the below-stock-ejectors t illustrated in Figures 18 to 21 of the drawings, and these relatively weak springs t are located in guideholes 03 which also serve as guides for the below-stock-ejectors t to slide in; To vary the effort exercised by the springs t adjusting-screws or the like d are employed, these are screw-threaded as'are also the guideholes d.

In a modified form of carrying this invention into effect as partly shown in Fi ure' 18 of the drawings and also by way 0 example in Figure 20 of the drawings, it will be observed that the above-stock-members of the press-tools areof a like character'to those Iillustratedjin Figures "1 to 14 of the drawings; it will also be observed that the arrangement of som'e-oft'he parts hereinbefore carrying and punch-holder-plate d of the kind employed when carrying the simpleform of; this invention into effect is in this modified-form divided or in two separate parts -orywhat may be described as parts formed by cutting the simple form of punchholder-plate (Z .into two pieces, one piece thereof is given the referenceletter d (Figures 19,20,521) in the drawings and this piece holds. through the medium of screwthreaded members 9 the below-stock diepunch gand is secured by bolts or the like a? to thebase-plate 70, but the other piece thereof which is given the reference letter e in the drawings and on or in which the below-stock blanking-die c is mounted and secured asare also the below-stock-ejectors t, is in this modification slidably-mounted on guide-pins or bolts 6 or the like equivalents which are arranged to pass through holes in lugs e on the said other piece 6 and these, said guide-pins or bolts 0', the head-partsof which are arranged to serve as stops, are screw-threaded into the said one piece hereinafter referred to as the punch-holder-plate d between which and the other piece hereinafter referred to as the below-stock retroceding die-carryingplate 0 in which the below-stock blan ingdie 0 and also the below-stock ejectors t are 'mounted and secured, there are provided powerfuls rings '6 or their equivalents, in the form 0 rubber-blocks or the like, which serve to separate the pieces d and e and to actuate or give adequate force to the ejectors if so that they will eject any article however stiff or resisting it may be, from off the diepunch g.

The said below-stock-cjectors t illustrated.

in Figures 18 and 21 of the drawings are secured against any independent movement in any direction other than with thebelowstock retroceding die-carrying-plate e or the below-stock stripper-plate f and in a hole or holes '7 (Figure 19-) provided therein, they are secured by screw-threaded members t, rivets or the like and as a result thereof the said beloW-stock-ejectors t obtain the advantage of the effort exercised by. the powerful springs e or f or their equivalents,

which actuate the retroceding diercarryingplatet-e or the below-stock stripper-plate f,

dimensions, as understood by press operatives, have to beejected byejectors such as .t which "are actuated by or through the medium of a resilient-member or members. A further and very important modification of the press-tools -made according to this invention'is illustrated in Figure 21 of the drawings in which modification the blanking-die 0, its spring or mechanically operated ejectors n of whichthere may be several in each above-stoclrclie-punch of, are located above instead of below the stock in such a manner that the said blanking-die becomes an above-stock blanking-die 0 having therein'an'above-stock die-punch a this with the said blanking-die o is mounted in, or on, and'secured to an above stock-holder or plate p b screws or any knownvmeans or so that in t is assemblage and arrangement of the component-parts of thepress-tools the subject of this invention, no above-stock stripper-plate is employed or is necessary, for the reason that the punch which requires a strippersplate and which lcoacts with the said blanking-die 0 is in this modification located below the stockandissecured to the below-stock punch-holder-plate d by bolts or screwed members 9 the construction in this modification of the invention facilitates the removal of the-blanking-die o for grinding and also the removal and replacement ofthe die-punch a and of the ejectors 11.

and their springs 12. as these are contained or housed in the said holder 17 andas a result,

of this arrangement and form of placement of the punch lb and of the blanking-die 0 it is possible to employa below-stock strip-v per-plate f or its equivalentwith its attendant advantages, as bydoing this the operations on the stock can be observed easily; but as fit is necessary in all cases to strip the stock '1) after it has been blanked or remove it; from off the said punch h' a below-stock stripper-plate such as f is an essential and is employed in this modification of carryin this invention into eflect.

In this mo ification the punch-holder plate (Z and the stripper-plate f are sepa-' rate pieces resembling two pieces d and e employed inthe modification shown'in Fig- '1 ure20 ofthe drawings, but in this further modification a below-stock blankingdie and retroceding' die-carrying-plate are :not employed, but a below-stock strippenplate f is employed which substitutes the abovestock stripper-plate 6 used in the other assemblages or arrangements illustrated.

In the modification illustrated in Figure 2101' -the drawings the stripper-plate f isactuated by springs f or thelr equivalents which move the said stripper-plate f and the below-stock-ejectors t in a manner similar to that employed for moving the diecarrying-plate 6 shown in Figure 20 of the drawings and the .below-stock-ejectors t .punch-holder-pla'te d d or the like to a bolster press or other machine.

which are secured to or in the strippervplate f serve to eject articles out fromthebelowstock punch-die h; the stripper-plate f in this modification; is guided and controlled in a manner similar to that'employed for controlling the distance of travel 201 movement of the die-carryingsplate 0 shown in Figure 20 of the drawings, orthe-said stripper-plate f isguided bymeansof guide-pins or bolts 'f which are screw threaded into lugs f or the like jprovidedion the stripper: Y

plate and the said pins or bolts f have heads thereon which are-arranged to serve as stops or to regulate the distance of travel of the stripper-plate f, the said pins or bolts. f are arranged to slide in holes in the lugs or bosses d provided ong the In a more-complex form of carrying this invention into effect as partly shown in Figures 26 to 28 of the drawings, it will be observed that the above-stock-puncha has 'below'stock two cutting edges, one a for cutting the The finished article is ejected intothe channel-way or chute u as hereinbefore described wrthreference to Figures 1to 4 of the drawm s. 1

in those forms of carrying this invention into effect where the below-stock die-carryg which communicates with a hole 9 loo 1 shown in Figures 13 and 14 of the drawings.

ing and/or punch-holder-plate d or d, as

the case may be, is secured .to a base-plate k i by screwed-members d or the like, the baseplate It is in turn optionally secured by bolts.

Where in those forms of carrying :this

invention into effect an above-stock-stripper.

s or the like of a and pressure-plate 1) preferably with a hard ened pressure-face-part 1). (Figures. 13, 20) is employed and is actuated by springs b 1' or their equivalents, and is also optionally guided by either bolts'b" or guide-pins d?) or their equivalents, the punch or each punch a then slides in a-hole or slot 6 provided .in the said stripperlate I) and each punch a is secured by any nownmeans in or to a holder-plate a which isoptionally secured by screws on orthe like'to an abovestock-base or plate r which in turn is op-' I tionally secured to a ram .m of a press or other machine, and in each said punch a invention into effect it will be observed that the said above-stock die-holder-plate p has above-stock-ejectors 71. therein which are sliclably-mounted in holes provided in the above-stock die-punch a these above-stockejectors n are actuated by springs 11, in a like manner to the above-stock-e ectors n slidably-mounted in the above-stock-punch a.

Any above-stock-ejectors n. used in this invention may be of circular or other form in cross-section or they may be of plate like-form.

The below-stock-ejectors it used in this invention may be of any form in cross-section,

they are however preferably of plate-likeform or flattened at the parts thereof which make contact with the finished articles they have to eject; sloping or bevellededges are preferably provided thereon which facilitate the ejecting or removal of articles thereby from either form of below-stockpunch g or h, as thecase may be. Where necessary shields g as in Figure 15 are provided on the ejectors t or over the slots g and ]L3 to exclude any obstruction to the freemovement of the ejectors t.

Channel-ways or chutes are provided in any assemblages of press-tools made according to this invention, thhough which all articles that are produced by the said presstools pass or fall.

The blanking-dies such as c or 0, or each one, or several of them in a set or gang, may be made so as to be in an integral piece of metal or they may be made as one or more sectional-dies from several separate pieces of metal, as shown in Figures 16 to 18 of the drawings, or from any suitable number of pieces or in any suitable number of parts and secured on ledges (l or the like Figures 4, 8 and 12, or to a die-holder-plate such as (I or to e or to p, by screws 0 or the like means.

The blanking-dies such as 0 01 0 and/or the stripper-plates such as b or f are optionally provided. near the cutting-edges thereof or near to the ,hole therein in which a punch such as a or h'enters or slides, with several small conoidal-points or jags such as 0 Figure 18, or alternatively and as substitutes therefor with one or more sharp protu berating-ridges optionally provided with sawlike teeth, any of these devices or means are employed to indent the stock and to-prevent that part thereof which is not cut out as a blank, from stretching or bulging whilst blanks are being cut therefrom.

The punches used in this invention such as a, a or (1 may be madein one piece and provided with slots such as 9, Figure 23, or they may be made as two or more pieces such as It and It, Figure 24, or as sectionalpunches. In the case where the pieces h and h are employed they are held or secured together by rivets or the like, or by screwthreaded-memberssuch as h. Slots 11. are provided in the pieces it and slots -h are provided in the centre-piece h to'accommodate the ejectors t.

' The press-tools the subject ofthis inventionv are arranged to produce a finished article from each blanking-die therein at each reciprocative-stroke of the punch which coacts therewith for cutting out blanks from sheet or other metal or material, or articles are produced by the said press-tools at each blanking-stroke thereof and are delivered away from the said press-tools at each return-stroke-after blanking and f ming has occurred.

The press-tools the subject of this invention have been devised to overcome known difficulties in the production of articles or blanks in rows at one time or at each blanking-stroke of the said press-tools, particularly when such rows extend nearly across the width, or the length, as the case may be, of a sheet of metal or other material, which sheet of metal or other material when operated upon by the known forms of punches and dies in a two or more followon process without conoidal-points or jugs such as 0 or the sharp protuberating-ridges as are employed according to this invention, stretches, bulges or distorts at that part or those parts of the said sheet of metal or other material which is or are not cut out into blanks.

It is to be clearly understood that according to this invention, the blanking-dies, or the punches, or the punch-dies, or the diepunches, or either or all of them, as the case may be, will begiven such forms or shapes for their shearing and/or folding, curling, raising, bending or forming-faces, as will allow them to coact in any manner when producing articles of dilferent contours apd/or shapes; and in addition any of the component-parts of the press-tools according to this invention is, or are provided with a channel-way or channel-ways or a conduit or conduits or a chute or chutes therethrough or therein, in which one wall or side thereof consists of one face of a blanking, folding or forming-punch, or like member, so thatthe said channel-way or channel-ways or the like serv to restrict blanks, or folded or fimshed-articles, or the like, in their path of travel therethrough afterthey have been ejected from the forming-tools; and the provision of a channel-way, conduit, or of a chute which is located at the side of any punch-member or the like in press-tools, is

in the spirit of this and an ejector having an oblique edge and movable by theforming punch and arranged to cooperate with the said forming punch to support a blank cut from stock whilst it is moved through the blanking die to the forming die, said oblique edge providing means for ejecting a finished article laterally from the forming die.

2. A'press tool comprising a blanking die,

a stripper plate, a punch movable through said die and plate, a forming die coacting with said punch. a die plate supporting a forming die within a cavity therein and a passageway arranged laterally to the forming die for conducting away from the forming die an article formed between the said die and punch, and an ejector having an oblique edge for ejecting the finished article laterally into said passageway.

3. A press tool comprising a blanking die having a cutting edge for cutting a blank from sheet material presented thereto, protuberances on the face thereof near the cutting edge, a stripper plate, a combined blanking and forming punch movable through the stripper plate and blanking die, a forming die, and an ejector slidable on the said forming die and cooperating with the punch to carry a blank sheared out by the punch from the blanking die to the forming die, said ejector being provided with an oblique ejecting edge.

4. A press tool comprising a movable forming punch, a blanking die through which the movable forming punch passes to act as a blanking punch, a die plate having a cavity, a stationary forming die mounted in said cavity, said die plate having a passageway formed therein laterally to the said stationary forming die, and an ejector havin'g'an oblique ejecting edge and mounted to slide relatively to said forming die.

5. A press tool comprising a movable forming punch, a blanking die through which the movable forming punch passes to act as a blanking punch, a die plate having a cavity, a stationary forming die mounted in said cavity, said die plate also having a passageway formed therein laterally to the said stationary forming die, and spring supported ejectors slidably mounted in the said stationary forming die and each having an oblique ejecting edge.

6. A press tool comprising a movable cut from stock by the said movable forming punch whilst it moves through the blanking die, a stationary forming die having an open passageway formed therein laterally to the said stationary forming die, and means integral with said blank retaining means 'for ejecting a finished article laterally into said passageway.

7. A press tool comprising a movable forming punch, a blanking die through which the movable forming punch passes to act as a blanking punch, a stationary forming die, means whereby a blank cut from stock by the blanking punch is transferred to the said stationary forming die, and means integral with a member of the said blank transferring means for ejecting a finished article laterally from the forming die.

8. A. press tool comprising a movable forming punch, a blanking die through which the movable forming punch passes to act as a blanking punch, a resilient support for the said die, means for guiding the blanking die to move in alignment with the movable forming punch, a stationary forming die, and an ejector having an oblique edge for ejecting the finished article from the forming die.

9. A press tool comprising a movable forming punch, a blanking die through which the movable forming punch passes to act as a blanking punch, a resilient support for the said die, a ram carrying said formin punch, a stripper plate resiliently mounte on said ram, a stationary forming die, and a spring supported ejector slidably mounted in the said stationary forming die and provided with oblique ejecting edges.

10. A press tool com rising a movable forming punch, a blan ing die through which the movable forming punch passes to act as a blanking punch, a stationary forming die, and a spring su ported ejector slidably mounted in the sai stationary forming die, said ejector having an edge cooperating with the movable forming punch to clam between them a blank cut out from stoc by the said punch whilst the said blank is carried to the stationary forming die, and also having an oblique edge for ejecting a finished article laterally from the said stationary die,

11. A press tool comprising a movable forming punch, a blanking die through which the movable forming punch passes to hct as a blanking ing a passageway on the opposite side there- 10 of to that on which the stock rests and a die cavity, a stationary forming die within said cavity. and a spring supported ejector provided with oblique edges for ejecting a finished article from the stationary forming 15 die into the said passage.

FRANK HUMPHRIS.

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