US2386155A - Drop hammer frame construction - Google Patents

Description

Oct. '2, 1945. H. A. wEYER 2,385,155

' DROP HAWER FRAME CONSTRUGTIN l Filed Sept. 28, 1944 Patented Oct. 2,) 1945 UNiTeDfsTArES PATENT oFriC''.4 A

Thisl invention relates to improvements in power hammers and, more fparticularly.'` to -an improvement in the frame construction thereof.

In drop hammer construction, in order to avoid intemalfstrains, the frame was originally made quite flexible.` However, productionI demands for forgings requiring very little finishing have neces-4 sitated revision of theframe structurealongimore rigid lines. Even in the `lnore'rigid1 structures in presentday use there is still necessity.for fieX- ibility in the frame structure since otherwise the deterioration would be so rapid as torender the hammerV substantially useless. It is, accordingly the practice to connect the side framesof the hammer to the anvil and to the ram-reciprocating mechanism by a means which will Ainsure ref turn of the various elements toan accurate seating following.eachhammer blow but which will enable the frames'at the moment of impact to give slightly and thus absorb theforces of impact. It has been noted thatthe side frames tend to rock on the anvil about the cute;` lower corners thereof with resultant separation of the upper ends of the frames. -Constant 4repetition of this movement results in considerable wear and ultimate breakage of either the upper ends of theframes, the ram-reciprocating supporting means with which they are engaged or through misalinement of the headand anvil breakage of the rod. l

, An important object of the present invention is the provision of a structureeliminating such breakage and permitting greater flexibility in the frame structure while at the Sametime providing the necessary rigidity for accuracy. l

A further and morespecic object of the inventionis the provision of a side-frameto-head connection such that'separation of thejupper ends of the side frames may take place without placing any breaking strain upon either the side frames or the head construction.

A further and still more specificobject of the invention is the provision in a hammer of side frames so articulated that freedom of movement is provided eliminating to thegreatest possible extent internal strainsv without any substantial wear at the abutting faces of the s ide frames-and head structure. f g

These and other objects Iv attain by the-'construction shown in the accompanying .drawing wherein, for the purpose of illustration, I have shown a preferred embodiment of my invention andwherein:j f Y f Fig. 1 is a fragmentary frontelevation of va l hammer embodying my invention; 1

Fig. 2 is a fragmentary side elevation thereof;

' Fig. Slis a section on line 3-3of Fig.V 1; Vand Fig. 4, is a fragmentary 'elevation illustratingL a modification.

Referring now more :particularly to the draw# ing, the numeral I-I) generally designates ananvil on which is seatedspaced `side frames II upon theupper` ends of Whichthe head IZ,` including the usualoperating cylinder for reciprocating the ram I3, is supported. In accordance with my in vention the engagement between the side frames and anvil may be that ordinarily employed. As at Vpresent showni the -frames "aresuitablyjkeyed to theanvil and are held in position uponthe seating faces of the anvil by `means of spring bolts I4-and I5 which; while permitting the necessarywslight displacement of the side frames at the moment ofimpact, insure return of thelower ends of the side frames to a properly aligned position. The side frames I I instead ofrbeing made in the form of unitary castings as is the usual practice, are formed in upperand lower sections I6 and I'I connected by a-pivotor wrist pin I 8 extending through suitable bearings formed in the sections in a directionfrom Ifront to back of theanvil and in parallelism to the side,frame seating surfaces thereof.. The confrontingjsurfv faces of the sections I6 and I'I are, at the outer s idesof theqpivot, provided with meeting surfaces preferably including replaceablewearpltaes I9 which come intoengagement when theisections are in proper alignment with one another.

Y At the inner sides of the pivotsfthe sections are relieved as at 20 so that the sectionsmay. jack- `knife'outwardly at the pivots but are positively` limited 'asto their approach at this point. s The upper ends of the upper sectionsare arcuately curved as at 2I to enable Athis movement to take place without any strain upon the head I2 which is provided with correspondingly curved seats and' is secured tothe upperends of thesid'e frarnes'through spring bolts 22' loosely mounted in each of the head and' side frames so as to per# mit thelimited relative movement which is'necessary. While the tensioncapplied to the'sections through spring bolts |41,Y I5 and 22 `willserve to restore the sections to proper alignment following a displacement thereof, I prefer to employ spring bolts 23 extending through the sections outwardly of the pivots and constantly tending to maintain Y `the wear plates I9 in engagement with one` another.` l. Y 4 A i f while :have at present illustrated the curvature ofthe surface at the upper end of theupper section as being concentric to theaxiso'f the pivot said means, said side frames each-"comprising a lower section having guides Vfor said ram-andan, upper section affording a seat iorsaidfhead'aa pivot connecting said sectionsA directed 'frorrr front to back of the hammer in parallelism to the upper surface of the anvil, Vand connections between the sections and head and anvil yieldably resisting relative movement of said sections about the pivot`.

2;'A' power hammer comprising'- anV anvil, spacedlside frames 'seated thereon, ahead seated on the upper ends of the side frames andfincluding" power-operating' means-,fa ramv operated 'by said nieans, 'said side 'frames-A each` comprising' a lowerv seotion having guides zfor` said framsand anupper sectionaiording a seat` for saidf head, a pivot connecting said sections directed* from front to back ofthev hammer-inparallelisrn vto the upper 'surfaceof 'the anvi1,"connections between the sections and-head and anvil'yieldably resisting relative #movement of said sections `about the pivot, and connections between the sections of each side frame yieldably'resisting pivotal movement offthe sections in a"direjctionjcausingsep arati'on' ofF the upper ends v0i"' `said' lower-sections.

SFA" power hammerA comprising an K anvil; spaced side frames; seatedA thereon;a.` head seated onthefupperjends of the side frames and' including power-operating" means, aram operatedjby said means,. said side Vframes eachcomprisinga lower sectionhaving` guides for saidramgand'an upper section affording va seatforsaid head, a pivotconnecting saidsections directedifrom iront to back'of' the hammer inparallelisrntoA the upper surface ofi'the connections between the sectionsjand head and, anvil yije'ldably resisting relative movement. of" said sections about the pvot, and means positively limiting pivotal move.- mentfof the'vsections' causing approach oi the upper ends of thelo'wer sections,

4; Af power hammer. comprising an anvil', spaced side frames seatedthereom-a head seated 'on the. upperends ofj'the side frames. and including, power-operatingmeans,` a ram operated'lby said means, said -side frames :each comprising. a

lower sectionhaving guides. for saidY ram-and ingas its centerfthe axis of the associated pivot.

5. A- powerl hammer comprising an anvil, spaced si'de'frames seated thereon, aheadseated on the upper ends oi the side frames andinclud'- ing power-'operating'meana a ramv operated by said'` means, said "side `frames. each comprising -a lower-section having guides for `said ram andan upper section affording a seat for said head, a pivot connecting said sections directed from front to back of the hammer in parallelism to the upper surface of the anvil and means resisting relative movement of said sections in directions causing separation of the upper ends of the lower sections.

6.l A power hammer comprising an anvil, spaced side-.frames seated thereon, a head seated on the upper ends of the side frames and including power-operating means, a ram operated by said means, said side frames each comprising a lower section having guides for said ram and an upper. section-aording a seat for said head, a

pivot connecting. said sections directed from front to back of, therhammer in parallelism to the upper surface of the anvil, means resisting relative movement ofsaid sections in directions causing separation of the upper ends of the lower section, and means positively limiting pivotal movement of the-sections causing approach ofthe-upper ends? of the lower sections.

'7. Av powerhammer`- comprising an 'anvil, spaced lside' frames seated thereon, ahead seated on the upper endsof the `side framesY and-including power-operating means, aramv'operated by said means, said 'side frames each 'comprising a lower section havingguides-*for Ysaid ramA and an upper section affording-a seat for said head, a pivotV connecting' said sections directed from front to back of the hammer in-parallelism to the upper-surface ofthe anvil and ,means resist-` ing relative movementofsaid sections in directions causing separation of-the upper ends of the lower sections,v thef seating engagement .between the head'andeach'upper sectioncomprising arcuate surfaces forming-segments `of a cylinder having asits center the axisof the associated pivot.

8. A powerhammer comprising an anvil, spaced sidek frames seated, thereon, a. head seated on the upper ends of '.the side frames andinclu'ding power-operating means,A a ram. operated by said means; said side frames .each comprising a' lower section having'Y guides for saidl ram, and anf'uppersecton `aifordinga seat for saidhead. apivotconnectingj said sections directed from front to backY of 'the 4hammer inparall'elismto the upper lsurface Vof the anvii; connectonsbetween the sections and head 'and anvil yieldably resisting relative movement of said sections. about the pivot, connections between the sections. of each side frame yieldably resisting, pivotal move.- ment 'of thsections in a direction causing separationV of the upper ends of said lower sections, and means positively limiting pivotalV movement ofthe sections causing approach ofthe upper ends of the lower sections..

9. A power hammer comprising an anvil, spaced sideframes seated4 thereon,7 ahea'dseated on the upper ends ci' the. side, frames and including power-operatingpmeansl. a ram operated by said'means, said side frames each-.comprising a lower section havingV gudesior saidram andan upper section. alfording a seatior saidhead, a pivot connecting saidsectionsdirectedirom iront to backof the hammer inparallelismto, theupper surface of the anvil, connections between the sections, and head andanvil Vyieldably resisting relative movement of said sections aboutthev pivot., and connections between thesections of. each sidey frame yieldably resisting pivotalv` movement of the sections in a direction causing sepa-ration otheupper ends. otsaidlowersections, the seating engagementbetweenthehead,and.eachupper section comprising arcuate surfaces forming segments of a cylinder having as its center the axis of the associated pivot.

10. A power hammer comprising an anvil, spaced side frames seated thereon, a head seated on the upper ends of the side frames and including power-operating means, a ram operated by said means, saidy side frames each comprising a lower section having guides for said ram and an upper section aording a seat for said head, a pivot connecting said sections directed from front to back of the hammer in parallelism to the upper surface of the anvil, connections between the sections and head and anvil yieldably resisting relative movement of said sections about the pivot, and means positively limiting pivotal movement of the sections causing approach of the upper ends of the lower sections, the seating engagement between the head and each upper sec-l tion comprising arcuate surfaces forming segments of a cylinder having as its center the axis of the associated pivot.

`11. A power hammer comprising an anvil,

spaced side frames seated thereon, a head seated v on the upper ends of the side frames and including power-operating means, a ram operated by said means, said side frames each comprising a lower section having guides for said ram andan upper section aording a seat for said head, a pivot connecting said sections directed from front 4to back of the hammer in parallelism to the upper

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