US1111403A

US1111403A - Metal-bending die.

Info

Publication number: US1111403A
Application number: US83041114A
Authority: US
Inventors: George A Ohl Jr
Original assignee: George A Ohl & Co
Current assignee: George A Ohl & Co
Priority date: 1914-04-08
Filing date: 1914-04-08
Publication date: 1914-09-22
Anticipated expiration: 1931-09-22

Description

G. A. QHL; JR. METAL BENDING DIE.

APPLICATION FILED APB. 8, 1914.

Patented Sept. 22, 1914.

'IIIE NORRIS IE1ERS 1: 9.. PH OTO-LIIHO., WASHINGTON. u. (r.

l erally, to improvements in dies for'forming UNITED STATES PATENT OFFICE.

GEORGE A. OHL, :3, OF NEWARK, NEW-JERSEY, ASSIGNOR To GEORGE A... OHL & 00.,

. A CORPORATION or NEW JERSEY.

METAL-ENDING DIE.

- To all whom it may concern:, r

fiO

Be it known that I, GEORGE A. OHL, Jr., a citizen of the United States, residing at Newark, in the county ofEsseX and State of New Jersey, have invented certainnew and useful Improvements in Metal-Bending Dies; and I do hereby declare, the following to be afull, clear,--and exact description of the invention, suchas willenable others skilled in the art to whichit appertains to make and use the same, reference being had to the accompanying drawings, and to characters-of reference marked thereon, which form a part of this specification.

Thepresent invention hasreference, gensheet-metal; and,'-xthis invention relates,

more particularly, to a novel arrangement and construction of dies adapted to be used in'that class ofpower presses which are employed for bending and forming sheet-metal into desired conformations, such forexample, as bending and forming the sheet metal into various forms of corner-pieces,

angle plates and the like.

The invention has for its princlpal ob ect to provide a novel arrangement and construction of dies by means'of'which may be formed or shaped small nose or bull nose corner-pieces, such as are connected with the angles of plasteredwa'lls'to reinforce the wall plaster at such points, and thereby prevent chipping and breaking of the wall plaster at such corners or angles.

Other objects of the present invention not at this, time more particularly enumerated will be clearly understood from thefollowing detailed description ofthe present 1nvention. l

WVith the objects of the present'invention 'in view, the said invention consists, primarily, in the novel construction of dies hereinafter 'set forth; and, theinvention consists, furthermore, in the novel arrangements and combinations of'the various parts of" the dies, as well as in'the details of the construction thereof, all of which w1ll be hereinafter more fully described, and then finally embodied in the claims which are appended to and which form an essential part "of this specification.

' The invention is clearly illustrated 1n the accompanying drawings, in which Figure 1 is a transverse vertlcal section of Specification of Letters Patent.

and embodying theprinciples of the-present invention, the same being shown in their normal 1n1t 1al posltions; Fig.2 is a similar vlew showing the novel bending dies in their operated positions upon the completion of their bending operations; and Figs. 3, 4: and 5 are respectively cross-sections of small noseand Fig. 6 of bull nose corner- Patented Sept. 22, 11914.. Application filedApril 8, 1914. Serial No. 830,411. v

pieces of the character possible to be formed 7 by the ope-ration of said novelbending dies.

1 Similar characters of reference are employed in all of the above described views, to

indicate corresponding parts.

Referring now to said Figs. 1 and 2 of the drawings, the reference character 1 indicates theI-bolster or main-body of the upper die-member from the upper surface of which pro ect the pairs oflugs or ears 2 adapted to embrace the hammer of a power press for operating said dies, and which are detachably secured to saidhammer by means of the transverse dowel-pins 3. Said bolster or main-body 1 of the upper die member corresponds inlength to the length of cornerpieces desired to be formed, such length being usuallyin sizes from eight to twelve feet, although of coursethe invention is not to be limited in this respect. Formed in the under side of said bolster or main-body 1 are a pair of longitudinally extending channels or grooves 4, in which are received the longitudinally extending stocks or tailpieces 5 of cam-members6 which are secured to the under side of said'bolster or main-body 1 by means of bolts or screws 7 The said. cam-members 6 parallel each other,

and are maintained by, the engagement of their stocks or tail-pieces '5 with said channels or grooves4 from any lateral movement of displacement with relation to said bolster or main-body 1. Each cam-member 6 is provided with a properly inclined cam-surface 8, and adjacent to the inner marginal edge portion of each cam-member 6 is a flattened hammer+portion 9. Connected with said bolster or main-body 1 so as toextend longitudinally between said pair of cammembers 6 is a plunger die-member 10, the lower or free end of which is wedge-shaped to provide a male die-portion, 11, having upwardly diverging side. surfaces 12 which may be curved to any desired degree, or which maybe flat surfaces, or which may be a combination of curved and flat surface 55 the novel bending dies madeaccording to according to the desired form to be given to the flaring walls of the corner-piece to be bent or shaped. -Saiol plunger-die member 10 is so associated with said bolsteror main body 1 as to be capable of a yieldable vertical movement with relation thereto, and to accomplish this end there are provided openings or sockets 13 extending vertically through said bolster or main-body 1,:-andk formed within said openings or sockets 13 is an annular shoulder 14L which provides a restricted opening 15 of reduced diameten.

die-member is yieldablycmaintained in its projected position by springsl8r surround: ing saidbolts 16 between the upper, surface i ;of said plunger die-member 10 and. said shoulders 14, so thatthe same are arranged within the lower. ends of said openingsor sockets, 13.. on

The reference character 19 indicates the bed plate of the lowerdie-member, the same benig'provide'duupon its, under side with a longitudinally extendingcrib 20. adapted to be received in a corresponding groove in-the anvil of a POWGI'rPI'QSS to thus aflix said lower 1 :die-member to the'latter, and in proper registration with, the upper die-member as carried, by the hammer of said power-press. The uppersurface of said bed-plate 19 is provided with a longitudinally extending TBchannelQ-l corresponding in width to the 40 Width ofsaid cam-members 6 as attached to the bolster or main-body l of said upperdiemember, and which are adapted to enter said channel '21 whenysa'id upper die-member is carried into cooperative relation with said.

lower die-member. Formed at each side of said channel 21, and preferably in the plane of the bottom 'of said channel,. arejlongitndinally extending grooves forming fulcrum.

bearings 22. Privot'all'y supported in the said fulcrunrbearings 22, by means oftheir fulcrum-ribs 23'formed at theirlower ends, are

a pair" of oscillatable die-members 24, the same being provided with die-surfaces 25 fCOIlGSPOIldlIlg to the side surfaces 12 of-the male die-portion 11 formed upon said -plunger die-member 10. Said oscillatable diemembers 24 are each provided upon their up per surfaces with projections or ribs 26.

adapted tocreceive the'operat'ive engagement of the cam-surfacesS of said, cam-members 6 of the upper die-member. The said, upper surfaces of said oscillatabledie-members 24 are also provided with longitudinally ex-v tending receiving-surfaces 27 adapted to receive the contact and pressure of said hammer-portion 9 of said die-members 6 connected. with said. upper die-members Ins serted in the oppositely facing inner edges of said oscillatable die-members 24 are longitudinally' extending pinching dies 28, the 7 -same having downwardly projected die-portions 29, the' rear or under sides ofwhich are (undercut. as at.30. Said pinching-dies 28 are made, preferably, vof hardened tool steel. Extending centrally, and longitudinally through said channel 21', the same being seatedz in a groove 31 whereby it is retained against-- lateral displacement, is a female-die 32,havin g,a;conc aYe:die;por-- o tion 33in :its upper, surface. Said female; 30 die 32 is alsof preferably madeof hardened; tool-steel In order to returnandmaintain said oscillatable die-members 24: in their.no ry mal initial or raised positions there are .pro-

vided; compression springs 34: which are seated in receiving recesses orj sockets, 35 7 formed in the bed-platelt), the uppenends of said springsfil beingseated in depressions. cr -sockets 86 formed on theunderside of said oscillatable die-members. 2t. In order 6' to, retain said fulcrum-ribs 23 ;of-s a idv;oscillatable die rnembers 24: sea ed- 'in-their respectivefulcrurn bearings 22, said oscillate" able die-members 24 are provided at their a respective outerv ends with outwardly pro jectedstuds 37 which are Jjournaled in re-I taining vlinks 38 which ,are secured by belts 39 to the respective ends of said' bedl plate 19. v i The operationof the ,abpye described construction of formingor bending dies isfas follows The sheet-metal strip which is to I be bent into a small-nosed or bull nosed-cor her-piece is first bent longitudinally inane gularform having ,a rounded. apex (as illus 5 trated in dotted representation in Fig, 1 by,v means of preliminary or'first operation dies, and when so bentithe sameis laid between said oscillatable die-members. 24s with the jrounded ,apex registered above" said female 0 'die32; The upper die member is now allowed to descend, and the male ,die-portionill of the plunger die-member 10 centers th'emetal strip and tends to carry the same downward to seat its rounded apex inthe female-die 32-, As the upper die-memberdescends the camsurfaces 8 ofthe cam-members 6 there of engage the projections .oriribs 26 of the, oscillatable die-members 9A,: thereby causing the sameto swing downwardly on their 6 fulcrum, simultaneously, causing the die- J surfaces 25t to engage the metal strip. and force the same in contact witlrthe die-sure faces 12-jof the plunger die-member 10, and, causing the die-portions 29 ofthe pinching dies, 28 to move, into contact. w ithfthe apex of the metalstrip. j 1' As thedownward movement of theupper die continues the .hammereportions 9. of the i cam-rnembers 6 engage the re ceiving sur facesi 2 7 of the oscillatable die-members 24, 1 and thereby a downward pressure is exerted 1 upon the die-members 24 which causes the "pinching-dies 28 1 to pinchfthe metal strip together just above the apexof thesame as 1 1 seated in'the female-die 32, and during this 25'of thegdie members iwithout preventcure the operation ofithe jpinching dies 28 i i as just described. Itwill beapparent that j variousi degreesof -the -pinching operation "may be securedlby regulating the degree of,

' 1 the downwardstrokeqormovement of the a stroke of the upper upper die-member 15 B shortening the ie-mernber, various sizes of small-nosed?corner-pieces 40 may be formed, such as are illustrated more particularly inFigs'Sandiand 5 of the'drawings,

and by completing the-full stroke of, the

upper die-member bullrnosed" corner-pieces 41, may be formed, such as illustrated in Fig, 6 Of the drawings) I e I I am aware thatsome changes ma z made in the arrangements-and combinations of the various devices and parts,- as well, as in the details of the, construction 'of the same, without departing from the scope of the present invention as described inthe foregoing specification, and as defined in 1 -the claims which are appended hereto.

Hence, I do not limit my invention to the exact arrangements and combinations of the devices and parts asset forth in the said specification, nor do I limit myself'to the eXact details ofthe construction of the said parts, as illustrated in the accompanying drawings. 1 a I claim 1 a v 1. In metal bending vdies, .a pair of oppo- I sitely facing oscillatable dieportions, sup

porting means upon which said die-portions are fulcrumed, &- female die-member centrally disposed on said supporting means between said die portions and toward which the latter swing, pinchingdies fixed in the free ends of said'die-portions and alinedbelow the die-surfaces thereof, said pinch} ing-dies coiiperatingwith said female die- .V f"mcmber during the bendingoperations, 2a ,vertically movable upper die-member provided with means for operating said oscil-; latable die-portionswhen contacting there-,

with, and amale-die connected with said upper, die-member with which the die-surfaces of said 1 oscillatabledie-portions 00- operate during the bending operations.-

cally yieldable plunger-die mounted on said member consisting of a bedrpla'te, oppositely j facing oscillatable die-portions; fulcrumed 2.'In metal bending dies, at lower die- 1 member consisting of a bed-plate, op ositely facing oscillatable die-portions lcrumed on said bed-plate, each oscillatable dieeportion having a projection on its upper side, each oscillatable die-portion having die-surfaces at its outer end, pinching-dies secured in the lower marginal edges of the outer end of said oscillatable die-portions, spring-means connected with said bed-plate and-engaging said oscillatable die-portions, I 1 to maintain the latter in normal initial position, and a female-die having a concave -d1fe depression secured to said bed-plate so as to extend longitudinally between said 'oscillatable die-portions; 'a vertically movable upper die-member consisting of a bolster,

cam-members connected with said bolster having cam-surfaces. adapted to engage said 1 projections of said oscillatabledie-portions to operate the latter, a hammer-portion connected with eachoam-member adapted to engage said hammer-receivingsurfaces of 1 said oscillatable die-portions, and a vert1- e bolster, said lunger-die-havin a male-die portion provlded with die-sur, aces adapted to co'ciperate with the die-surfaces of said oscillatable die-portions.

3. In metal-bending dies, 1 1 lower dieon said bed-plate having die-surfaces at their outer ends, pinching-dies secured to the lower marginalfedges of the outer ends of said oscillatable die-portions, spring-v means mounted in said bed-plate and engaging said oscillatable die-portions to I maintain the latter in normal mitialQpositions, a stationary female-die secured to saidbed-plate and extending longitudinally between said oscillatable die-portions; a 1 a f vertically movable upper die-member con- 1 ""sisting 0f a bolster, cam means connected;

with said bolster for engaging and 0perat ing said oscillatable due-portions of said lower die-member, and a vertically yieldable plunger die mounted on said bolster, said plunger-die having a male die-portion provided with die-surfaces adapted to 00 In testimony, that I claim the invention set forth above I have hereunto set my hand this 30 day of March, 1914.

GEORGE A. oini, JR.

Witnesses:

AUGUST A. BERGHOF, f.FREDK. C. FRAENTZEL.

.1 Copies of this patent may v be' obtained are cents each, by addressing the Commissioner 01 Patents,

' 1 a 1 1 Washington, I). G. 1

.operatewith the die-surfaces of said oscilla'table die-portions.