US3610008A - Peening tool - Google Patents

Abstract

APPARATUS FOR EFFECTING A PEENING OPERATION IN WHICH THE PEENING ELEMENTS ARE CONFINED IN STRUCTURE AS COMPARED TO CONVENTIONAL "FREE THROW" METHODS. SPECIFICALLY THE SUBJECT APPARATUS IS ADAPTED TO PEEN THE SURFACE OF A CIRCULAR BORE OR PASSAGEWAY IN WHICH RECIPROCAL MOVVEMENT IS IMPARTED TO THE PEENING ELEMENTS BY ROTATION OF AN ACTUATING MEMBER OF NOVEL CONSTRUCTION. COMPLETE COVERAGE (PEENING) OF THE AFOREMENTIONED BORE IS INSURED IN THAT ROTATIONAL AND LENGTHWISE MOVEMENT OF THE HOUSING OR CASING IS MANUALLY IMPARTED THERETO.

Description

()ct. 5, 1971 A, K. FoEDlscH 3,610,008

PBENING OoL Fi1ed June 27, 1969 2 SheetS-Sheet 1 IInited States Patent o 837 039 No Int. CL B21c 7/o; BZ1b U.S. CL 727 Clmms ABSTRACT of THE DISCLoSURE AppafatuS fof e1fecting a peenin opefatlon ln whlch the peening eleT1entS afe conned ln Stfuctufe a coff1 pafed to conventional ffee thfow fnethods. spec1Hcany the subiect appafatus iS adapted to peen tho Sufface of a cifc111af bofe of paSSagevay in vvhich fecpfoca1 o1ovefnent iS ifnpafted to the peenfng e1eITlentS oy fotat1on of an actuating Ine[nbef of nove1 conStfuctlon. Complete Covefage (peening) of the afofefflenfioned bofe IS lnSufed in that fotationa1 and 1engthwiSe Inovement of the hoUS ing of caSing iS Inanuany ifnpafted thefeto.

ThiS app1ication iS a continuationinpaft of ouf ap p1ication Sef. No. 698,478, f11ed 1an. 17. 1968. Shot peen ing pfoceSSeS have ceaSed to be a. tfia1 and effof opofa fion but have developed into a cloSe1y denned nlechanloal opefation, cafefUHy contfo11ed and capab1e of pfoduclng Unffofn1 fesultS conSistent with den1andS of today,S n1aSS pfoduction nlethodS.

PfocedufeS aS o11t1ined above neceSSafi1y place feStf1c tions and 1iInitationS on the opefation, howevef, additiona1 feStfictionS have fecent1y been Set fofthin fact de Inandedto f11fthef iInpfove the sefviceability of an afticle tfeated by Shot peening nlethods. 1 of eXafnple, to fuff11ef ifnpfove the quality of a pfoducf fequifeInentS have fecent1y been Set fofth fequifing the Shot to Stfike (iInpact) the Sufface of an aftic1e in a difection noffnal to the Sufface.

specincany, IniHtafy and othef specif1cationS quite ffe quent1y set fofth that the sufface of apeftufeS, paSsage wayS etc., be peened in a Inannef in which the Shot Stfike (in1pact) nofna1 to the sI1fface thefeof. To the beSt of applicant,S knovvledge, this pfocedufe haS not been poS sib1e utiHzing pfeSent1y known methodS, thiS iS pafticulaf- 1y tfIle in caSeS vVhofe the sufface of bofeS, paSSageVays etc., nluSt be peened in the f1eld.

FI(. 1 conStitutes a 1ongitudina1 Sectional view of a pfefeffed embodiment of the peening too1 diScloSed hefein, the vieW being taken on the line 11 of FIG. 3.

FIG. 2 is a view Sifn1iaf to FIG. 1 of anothef eInbodi n1ent of the peeningtoo1diScloSed hefein.

FIG. 3 iS a sectfonal view of the peening too1 of FIG. 1 vieWed aS indicated by the 1ine 33 of FIG. 1.

FIG. 4 iS a cfoSS-Sectiona1 view of an indiv1dua1 face of the too1 of FIG. 1 of 2.

FIG. 3 iS a 1ongitudina1 Sectiona1 view of anothef em bodiInent of the peening tool diSCloSed hefein.

F1(3. 6 iS a Sectiona1 view taken on the line o8 of F1G. 5.

Refeffing to the dfavvingS, a pfefeffed embodiment of the peening too1 11 aS diSc1oSed hefein iS Shown in FIG. 1. The tool 11 iS 11ti1ized to peen a passageVvay 12 of cifculaf cfosS-Section pfovided in the St1Jctufe 14.

The too1 11 includeS a face aSSen1bly 16 having innef and oufef diaInetefS X and Y, feSpectively, With a p1Ll fa1ity of peening e1eInentS 17 Inonnted thefein and a plungef Inen1bef 18 funcfioning to eXcife the eleInentS 17.

The ovefaH conngufaHon of the membef 18 is beSt Seen by fefeffing to FIG. 3. The maximum diametef of the membef 18 is sIlCh that it haS a ffee (funning) f1t with feSpect to tho inside diafnefef of the face aSSefnb1y 16. The onfef sufface of the membef 18 iS pfovided With coffugations de11ning a p1ufaty of high and 1ow pointS aS indicated by fhe numefalS 18 and 21, feSpectively. A bore 22. cifcu1af in cfosSSecti0n, eXtends thfoughout the 1ength of the nlefnbef 18, the aXiS of the bofe coinciding With the aXiS of the membef 18. The length of the membef 18 iseqlla1 to the 1ength of aSSefnbly 16 and itS 1ength S1ightly eXceedS the width of the stfuctufe 14 (paSSage vvay 12) aS beSt Seen in FI(1. 1.

The aSSeIIbly 1oinc1udeS a plufality of fndfvidua1 face asSemb1ies 24, detans and construction of which are shown in FIG. 4. EaCh of the face aSSemb1ieS 24 includes fight and left hand face membefS 26 and 27. fespectively, the only diffefence befween the nfen1befs 2o and 27 being that one caffieS a plufaHty of pins 28 (FIG. 3) while the othef haS a plufality of bofeS (not Shown) foffned thefein adapted to feceive the pfnS 28 of a coffeSponding face nlen1bef. thus, the connection of the fnen1befs 26 and 27 iS e1fected.

In the aSSenb1ed fe1ation of the men1befs 2G and 27 (F1G. 4), it Will be seen that theif intefna1 conStfuction is SUch thaf they coopefate fo deHne a plufa1ity of SUb stantia11y SphefiCal cavitieS identiHed by the nUmefa1 29, each adapted fo feceive one of the Sphefica1 InefnbefS 17. The cavities 29 afe S1i ht1y elongated in a fadia1 difeCtion vVith feSpect to the aSSen1b1y 24 and pfovide openingS on the innef and outef SuffaceS of the aSSeIT1b1ies 24. Thus, the fneInbefS 17 afe ffee to fecipfoCate of fnove back and fofth in planeS pafanel to the centfa1 plane of the aSSefnb1ieS 24. Fof pufpoSeS of i11Ilstfation, it is asSumed that Sphefical IIembefS afe oneeighth (.123) inch in dian1etef. In this i1111stfation, the cavitieS 29 afe fofn1ed I1ti1izing fouf fadii appfoXinlately one-Sfxteenth (.0623) of an inch. Sepafated in fhe p1ane of fhe assefnbly 24 (FIG. 4) and nofma1 thefefo, by .015 CoffeSpond ing felationS WiH ap 1y aS the diaTnetef of the nefflbefS 17 incfeaSe of decfeaSe in size. Thos, it vviH be appafent that the n1eInbefS 17 afe ffee to n1ove fifteen thousandths of an inch (.01S) in a difection pafane1 to the centfa1 p1ane of the aSSefnbly 24. a1So that the ITlefnbefS 17 afe to pfotfude S1ightly beyond the innef and oLltef Suffaces 32 and 33 of the aSSeInblieS 24 when fecipfocated.

1/Iaiof cofflponents of the foo1 11 having been deScfibed, a bettef UndefSfanding thefeof and itS opefation vviH be fofthcoming ffofn the foHovving deScfiption of the nannef in Which the too1 iS aSSeInbIed and the felationshi S fevailing betWeen the to01 11 and the Stfuctufe 14 afe de Scfibed.

In assen1bling the fool 11, the Shaft 23 iS feceived in the bofe 22 of the n1efflbef 18 and is positioned adjacent a 11ange 41 conStitUting an integfal paff of the Shaft 23. ThiS felation, of the Shaft 23 and fnefnbef 18, is fnain tained thfoughout the opefation of the too1 11, in othef wofdS, the membef 18 iS ffXed1y SecUfed fo the Shaft 23. A fneInbef 36 iS novv poSitioned on the Shaft 23 adiacent the Hange 41 bUt on the oppoSite Side ffon1 t11e fnen1bef 18. The Shaft 23 and 11ange 41 afe of a SiZe and Shape in- SUfing a ffee fotating f1t thefebetween and the Shaft 23.

A p1Ufality of aSSen1b1ieS 24, equa1 to of Slight1y eX ceeding the length of the nlefnbef 18, afe now posftioned on shouldef 40 of the Inefnbef 36 as shown in FIG. 1 in Sideby-side and Suffounding fe1ation vvith feSpect to the membef 18. The aSSemb1y 18, membef 18 and Shaff 23 afe now inSefted in the bofe 12 pfovided in the fneInbef 14.

A nlen1bef 37 iS noW SeCufed to the outef end of the shaft 23 by nleanS of a StIld-1ike bo1t 44. T11e bo1t 44 fUnctionS ten1pofafily to fetain the membef 37 on the Shaft 23 and thefeaftef as beafing fneanS fof the bo1f 44 and con- Sequently the olIfef end of Shaft 23. In this feSpect a ffee

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