USRE22743E

USRE22743E - Precision squeezek yoke

Info

Publication number: USRE22743E
Authority: US
Publication date: 1946-04-09

Description

April 9, 1946, H s, SINES Re, 22,743

PRECIS ION SQUEEZER YOKE Original Filed Dec. 8, 1943 7/////////,/ /AIV/l supporting bracket is adapted'toreceive Reissued Apr. 9, 1946 22,743 PRECISIN SQUEEZER YOKE Harvey S. Sines,

Montebello, Calif., assignor to Consolidated Vultee Aircraft Corporation, San Diego, Calif., a corporation of Delaware Original No. 2,375,445, dated May 8, 1945, Serial No. 513,414, December 8, reissue January 10, 1946,

9 Claims.

The invention relates to pressure operated tools. l i

Portable tools now in common use comprise a frame equipped with power means, such for` example as a cylinder and a piston, for the operation by pressure of a ram or tool which is slidably guided in the frame and a thrust-receiving bracket with a device, such as a socket die, for the punch or an anvil for a riveting tool. In the operation of these devices, the compression forces of the ram transmitted to the opposed thrustreceiving bracket, for the socket die when metal is to be pierced or the anvil when a rivet is to be upset, frequently cause bending in or deflection of the bracket. This deflection causes the relationship of the normally coaxial punching tool and the socket to be changed, or angular varia? tion between the normally parallel opposed compression faces on the tool and the die or anvil. This results in lack of precision in punching or irregular upsetting in riveting and frequently results in injury to the ram. In piercing holes where precision is necessary, it is important to maintain parallelism of the opposed compression faces and the co-axial relation of the punch and socket or die in order to insure regularity and the true or desired axes oi the holes punched in the work. f

One object of the invention is to provide an improved tool of this type in which the power op erated ram or tool and the coacting thrust-receiving devices. such as a socket or anvil, are rigidly connected by a yoke which is supported at the end of the thrust-receiving bracket and supports the ram at its other end so that any bending in or deflection of the bracket, produced by pressure` from the ram, will maintain the opposed compression faces in normally parallel, or the punch and the socket-die in normally coaxial, relation,

Another object of the invention is to provide a 1943. Application for Serial No. 640,162

precision yoke-structure which may be used as an attachmentto the frames of power units.

Another object of the invention is to provide a portable punching device inwhich the punch and socket-die are conjointly movable by a rigid yoke so that their compressionfacesand axial relation will be maintained notwithstanding any deflection of or bending in the thrust-receiving yokeduring the vpunching operation.

, Another object ofl the invention is to provide a pressure operable riveting toolinwhich the ram and the anvil are supportednby a rigid yoke which the workY and which is supported f roma bracket in lsuch a manner that any means for the operation of Other objects of the invention will appear from the detailed description.

The invention consists in the several novel features hereinafter set forth and more'particularly defined by claims at In the drawing:

Fig. 1 is a side elevation of a power unit equipped with a deviceembodying the invention.

Fig. 2 is a perspective, parts being broken away, of the supporting bracket which is attached to the frame of the power unit and is provided with an arm for receiving thrust through a socket-die and the yoke for supporting the ram from the thrust-receiving end of the supporting bracket.

Fig. 3 is a section taken on line 3-3 of Fig. 1.

Fig. 4 is a section taken on line 4-4 of Fig. 1.

Fig. 5 is a section taken on line 5 5 of Fig. 1.

Fig'. 6 is a side elevation of a modified form of the invention.

Fig. 7 is a section taken on line 1--1 of Fig. 6.

The invention is exemplified in a portable unit which comprises a casing or frame l0 for'powermeans, such as a piston (not shown) operable by compressed air-in a cylinder Il for operating a stem l2 which is slidably mounted in the frame l0 and adapted to shift a ram 29. The unit also comprises a handle i3 and a throttle-lever i4 for manually controlling the operation of the powerthe stem l2, all oi which may be of any suitable construction. In Figs. 1 to 5, the unit is exemplified as used for punching or piercing holes in a plate of metal and the ram 29 functions as a punching tool.

A generally C-shaped bracket i6 is adapted to extend around or receiveth'e work, such as the plates to be punched or pierced andl comprises an arm I6* on the side of the ,work at which the power-means is located, and an arm lh eX- tended tothe opposite side of the work, the arms being integrally connected b y the bend between them. The arm I6a is provided with a groove I1 for receiving a flange i8 which is rigid or integral with the frame vlll and bolts I9 extend through said flange and an extension on arm 16a of bracket I6 liEor rigidly attaching said arm to the frame l0 and supporting the bracket H5. The vend of arm lh functions as a thrust-receiving member on-the side opposite the power side. y

A pair of generally C-shaped rigid yokes 2l are the conclusion hereof .y

wenn functions ,as s penes,

disposed at the opposite sides of the bracket IE, respectively, Each yoke comprises a member or arm 22 which extends to theend of the thrustreceiving arm I6b of bracket I6 and a member or arm 23 which extends to the power or opposite side of the work.` The ends of yokemembers 22 are rigidly secured by bolts 24 and dwel pins 25 to the end of arm |61. The arm I6b thus functions to support the yokes at the side opposite the side of the work where the pressure is applied by the ram 29, from frame I at the opposite vside of the work. A guide block 21 ts between the ends of yoke-members 23 and is xedly VVsecured to vsaid members by rivets 28 or may be Welded thereto so that the guide block and the ends of yoke-members 22 will be rigidly secured andfthe guide block will be supported through the, yokes from the thrust-receiving end of arm IBb of bracket IE. The ram 29 is slidably mounted in the guide block 2 1 forVmovement to and from the. thrust-reeeivins erin, |56? by., pressure fr Qm theprieunaticall-ypperable s tem -I2 Whichis 4slidablygmounted in the frame I0. A coilspring between the guide block 21 and a head A3| on the lfm idapd t0. lfert tn eflfam after a Pres" sure stroke. The ram 2 9fguided in the b-lock 21 ist thefpQWer siele 9i thewerk'is supseted by the rekes 2 lfwhieh are supported freni the thrustthe thrst-reeeivins end effith'e aim .l 6b ef breeka d the adjacent edge et f Band comprises a flange af Which'is ac iap'tedA to abut against said Af acemll. An opening va2 ex- `tends vertically through the arm 16h for vthe punch-2Q which passes Lthruigl1- the socket in lthe diej which coacts with the punch to pierce a plate. ,The socket in lthe die q land the ramV '29 when used with a socket-die, are co-axial and faces of Aheptinclggand the die La andbetween the y he die andthe parallelism of the compression faces on the punch and -oh the die will Will., th'e'il besesere-tediihder "ee'rt tofimpart a driving'st'roketo the metal will be piercel d between the compression faces onthe ram and the socket-die nthe'end In practice it is desiredrte. eroi@ excessive Weiehsfnihe seieezer yo l n e in its entirety/'because of the`r1eessity the" rcompression position of which may vary in hardness, is sometimes sucient to cause the pressure against the end of the thrust-receiving arm |61l to bend the racket I6 between the arm I6b and the arm Hia which is rigidly secured to the frame I0. When this bending occurs, the 'arm |611 would be dee-c'td so its compression `face 120 will be misaligned or shifted out of parallelism with the normal plane of the compression face on the ram or so it will not be perpendicular to the prolongavtion of the normal position of the axis of the when the zram is supported in the arm Hin Vof vbracket 'IG 'or in the frame IU. When this bending occurs 'in my construction, the yokes 2 block 2-1 and the ram 29 will be conjointly shifted or deflected, 4the parallelism between the Acompression 'faces on the ram, and the socketdie will be maintained and the axis of the ram will remain perpendicular to the compression faces on the dieandthe face 20 on arm I6 b and coaxially aligned with the socket in the die a. The ram will not lie-subjected to injurious stresses thefstress o f compression of fthe Jmetal at the-point of piercing will be distributed as des ired betwe en compression faces notwithstanding the nding which has occurred in the the holes in the -work bracket 1 6, andprecis'ion in wiileeeehieveevIn Figs. 6 and'l-,the invention is illustrated for jin Y upsetting Vrivets. In this form of the invention, ythe stern Stof a rivet-set 35 ts in the opening afin thethrus't-receivingarm 16h. The set has e sn'aewhieh ebiifs aesinet 'the iep face 2p of th e a1rn lb: 'I'herivet-'setis adapted tov-hold Ia rivet 3 6 which will be upset by theram 2 3 and issubsti'tut'e'd 'for the socket-die a. In this Yrno'dicatjficir 1 the A compression -faes of the rivet-set aridbetwee--the rivetset and arm 16h, and v`t ;1 j1e compress on faceonlthe ram or riveting tocl -2.9 wi 1 l be conjointly s hiftedor deflectedto maintain their nc'r'rnal relationshipr when the compressionfores are sufficient, to produce a 'pd in1 1; e1prackt .lt-'between lits mns, as be- -fereseserieee-- Preferably dual syoke's are .pr'o J ided for supend of the thrust-receiving arm to insure 'against transverse move- `I ir1e1 1 t ofthe ram, but it will he under-stood that in some instances as'in'gle lyoke may vsuflic'eA Iflieyoke structure is Iadapted )to v'be atftaclieirl to vthe frame if 'aportable power unit and may be `app1ied topowe r `units as a substitute 'for brackets withoutlyokes.

The i r'i"/er 1tio n also Xeiripl'iiies ayoke'strUCture which is vadapted vfor diIereI-'t work, 'such as piercing andfrveting. 'I lelyo'ke structure -i's y'sirnpleninwcoristruction'and Aefflc'ie'nt "in -opc ation, Darticular ly where, as aircrafujiecisin is reguiredin 'the workjperfor'med bythe tools.

The invention i'snt to befundistood 'restricted ,fo the deal-ssa *fijamente thse r11-ay beiimciinec-wtn 1 @ne "scope 'f fthe 'appended -claims Without dpaftirfg "from "the spirit and ,siagneflits ci "dfnie nuda, wrist 1 claim as new and *desire `t`o "sc're 4y Lett'sPatentls:

'1. 'fue combination with a portable iframe, power operable "means 4viiio'unted `i'n""and po'r't'ably supported by `the Vfra-me, for operation a ber having an end portion to which the thrustreceiving member of thebracket is rigidly se cured and a member extending to the power side of the work, and a ram operable by said power means for operation kon the work and operably supported by the member of the yoke on the power side of the work, the yoke being adapted to support the ram for maintaining normal working relationship between the ram and the thrustreceiving member ofthe bracket when pressure from the ram causes deilection in the bracket.

2. The combination with a portable frame, a power operable stem mounted for rectilinear sliding movement in the frame and portably supported by the frame for operation at one side of the work, a portable substantially C-shaped bracket having one of its members connected to and supported by the frame and a thrust-receiving member on the opposite side of the work, of a portable rigid yoke comprising a member having an end portion to which the thrust-receiving member of the bracket is rigidly secured and a member extending to the power side of the work, and a portable ram operable by said power means for operation on the work and slidably supported in the member of the yoke on the power side of the work, the yoke being adapted to support the ram vfor maintaining normal working relationship between the ram and the thrust-receiving member of the bracket when pressure from the ram causes deflection in the bracket.

3. The combination with a portable frame, power operable means mounted in and portably supported by the frame for operation at one side of the work, a substantially C-shaped bracket formed oi a single solid narrow wall with flat sidefaces, having one of its'members connected to and portably supported by the irame and a thrust-receiving member on the opposite side of the work, of a portable yoke, having a, pair of sides in close relationship with the side-faces of the bracket, each comprising a member having an end portion to which is rigidly secured the thrust-receiving member of the bracket and a member extending to the power side of the work, and a portable ram operable .by said power means for operation on the work and operably supported by the member of th'e yoke on the power side of the work, the yoke being adapted to support the ram for maintaining normal working relationship between the ram and the thrustreceiving member of the bracket when pressure from the ram causes deflection in the bracket.

4. Th'e combination with a portable frame, a power operable stem mounted in and portably supported by the frame for operation at one side of the work, a portable substantially C-shaped bracket formed of a single narrow solid wall with substantially flat side-faces, having one of its members connected to and portably supported by the frame and a thrust-receiving member on the opposite side of the work, of a portable rigid yoke having a pair of sides in close relationship with the side-faces of the bracket, each side comprising a. member having an end portion rigidly secured to the thrust-receiving member f the bracket and a member extending to the power side of the work, a block ilxedly secured between the ends of the yoke sides on the power side of the Work, and a ram slidable in and extending through said block and engageable by said stem for operation of the work, the yoke being adapted to support the ram for maintaining normal working relationship between the ram and the thrust-receiving member of the bracket when pressure from the-.ram ,causes deiiection in the bracket; .Y

5. The combination with a portable frame, a power operable stem slidably mounted in and portably supported by the frame for operation at one side `of the work, a portable substantially C-shaped .bracket formed of a single narrow solid wall withsubstantially dat side-faces, having one of its-members connected to and lportably supported by the frame and a thrust-receiving member on the opposite side of the work, of a portable rigid yoke having a pair of sides in close relationship with the side-faces of the bracket, each side comprising a member having an end portion rigidly secured to' the thrust-receiving member of the bracket and a member extending to the power side of the work, a block xedly secured between the ends of the yoke-sides on the power side of the work, a ram slidable in and extending through said block and engageable by said stem for operation on the work, the yoke being adapted to support the stem for maintaining normal working relationship between the stem and the thrustreceiving member of the bracket when pressure from the ram causes deiiection in the bracket, and a spring between the ram and the block for retracting the ram.

6. The combination with a portable frame, a power operable stem slidably mounted in and portably supported by the frame for operation at one side of the work, a portable substantially C-shaped bracket formed of a single narrow solid wall with substantially flat side-faces, having one of its members connected to and portably supported by the frame and a thrust-receiving member on the opposite side of the work, of a portable rigid yoke having a pair of sides in close relationship with the side-faces of the bracket, each comprising a member having an end portion rigidly secured to the thrust-receiving member of the bracket and a member extending'to the power side of the work, a block fixedly secured between the ends of the yoke-sides at their ends cn the power side of the work, and a riveting tool slidable in and extending through said .block and operable by said stem for operation on the work, and an anvil carried by the end of the thrustreceiving member of the bracket, the yoke being adapted to support the ram for maintaining normal working relation between the ram and the thrust-receiving member of the bracket when pressure from the ram causes deiiection in the bracket.

'7. A unit for attachment to a portable frame carrying power means comprising a portable substantially C-shaped bracket having ione of its members provided with means for detachably connecting it to and supporting it from the frame and an integral thrust-receiving member on the opposite side of the work, a substantially C- shaped portable yoke comprising sides in close relation to the bracket, each side having a member with an end portion to which the thrust-receiving member of the bracket is rigidly secured and a member extending to the power side of the bracket, a tool slidably mounted between the ends of the yoke at the power side and a co-acting die carried by the end of the member of the bracket at the thrust side of the work, the yoke being adapted to support the tool for maintaining normal work relationship between `the tool and the die when pressure from the tool causes deflection in the bracket.

8. A unit for attachment to a portable frame carrying power means comprising a portable substantially C-'shaped'solid narrow 'bracket one of its members detachably connectabletonnd adapted Yto `be portably 'supported by thefiframe, and an integral thrustmeceivng member 'on `the opposite side of 'the fwork, asubstantialy 'cshaped portable "yoke comprising sides :in fclose relation to the. sides 'ofthe bracket. .each sid'ezh'av-- ing a member'with :ain end 'portionto'whoh'the thrust-.receiving member :of .the bracketrigidly secured and a'member `(attendingtothe .power side of the bracket, .a block xedto the of Isaid yoke members adjacent the power side @i `the bracket between the yoke Ia tool 'slida'bly mounted in the block for operation lby the 'power means, a spring between vthe-tool and the :block for retracting the tool .and a -co-,acting die carried by the .end of the .member of vthe bracket :at the thrust side of the work, the yoke being adapted to support the tool 'for maintaining normal work relationship betweenfthe .t'ol and the die when pressure lfrom the itool `causes deiiection in the bracket.

v9. A unit attachment to a portable frame :carrying power means `comprising va Vportable .sub-

stantally .C-sha'ped-bracket having a solid narrow wail undone .of `its members detaehably connectabie to and .adapted to be portably sup-ported bythe frame, and an integral thrust-receiving merriiberk on .the opposite .side of the work, a substafntially C-shaped portable `yoke comprising sides 1in, close relation to the sides of the bracket, each side .having a member `with 'an end portion to which the `thrust-receiving member of the bracket is rigidly .secured and a member extending to 'the power Iside of the bracket, a block fixed to the vends of said yoke members adjacent the power side of the bracket; and between the yokesides, a riveting tool slidably mounted in the block for operation by the power means, a spring between the tool and the block for retracting the tool, and an anvil carried by the end of the memberfof the bracket at the thrust side of the work,

Y the yoke being adapted to support the tool for maintaining normal Work relationship between the ltool and the anvil when pressure from the tool causes deection in the bracket.

HARVEY S. SINES.