Worcester Polytechnic InstituteDigitalCommons@WPI

Morgan Documents Morgan Construction Company records

July 2014

Rod Mill No. 256Maurice Knott

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Recommended CitationKnott, Maurice, "Rod Mill No. 256" (2014). Morgan Documents. Book 213.http://digitalcommons.wpi.edu/ms077morgan-docs/213

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Bethlehen1. Steel Cc:tnllal'-Yo Spa"l' .. ows Poi:1.t l L ~-;;.e Geo.l"s f.or the N0-Tv_rist Finiah.inJ ~Ail's

:~IS'-:USSION.

!_ 0 Ge:neral

The g"""ai.S for 'i:!M;:) E'TELCO cr,nd fh.e J .. &L,. No· .. T'-vit~t F~.nishi:ng I\.Ji~_!_:· s ·ve:re th-=· sa..~..:. ... e.. The fou;: _al·gest d:t·iven be-".r:..'. . gears on J .. e: L~ \Ve:.·e not 5.:n.ter;:r<:'lJ. "';"!~:~h. theil' tb,e gea. ~ .. teeth v1ere t.u1c. ~.l:.ged.,

"7o:: Bet lehe1n the::.•e a:te chaageo., ''fhe ne\-::t geal·o aro .'.lho~vn

in ::ed on Figu::e 1.. In sizh:!g these gea: B •':! .. "'"· STJ!;LCO na.:-:le Du.dley) ra:d.ng formiJ.lao ":.":rere used,, In (2) the ,.vea:• formula ).s corn.:;?arec~ v.6.th i\!o:r.·ga:n.~C! ·7e':"1.1• fo···rnt.!la,..

Rat·ng Fo?mulas ---..,....-~~-·~~ ..... -The g.;;ars 2.:;:·e s:.z~~d fo1· weal· {l..<itting}.., Zl.:i d a. pitch is then l:tclcctccl to mz.ke the te~th stro:n.g e:not1gh. be?,1."l"l st::.·e:tt.gthh J:""ol" this :t eason only the \Te:":IJ.• fo1$n::.ul2.s a~:e co:n"l~1f.'~1 .. ed ..

l\-ioJ?"ga;r1i s Wear· Fo:•.·1nu.la. ... ~ .. ~-----~~~· ,......,..,.,.. _ _...__,_~_.....,.

Fo:<:- the :::-.aedittX'!1 ha:::.."d, d:-:·i .. e heH. ~:::.::.e.: ·wh:i.c!1 v.re :rl..:.l..n to cut 0:1 a Ma.ag 1nachine~ Ivf.::l!'g~.:n uses Kl = 360 c.11d Cv· :::: 78/ T8 + V-_::/, J.: o:r Bethlehen:1; s s:ln.gJ.e

V/t == Kz Cv d F( ::.:_fL..-.-)' \ r::>.,..,. .... 1 . 5 • 3 ..

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.d.o. :t\_.:n~ 1.Tc" 256 B. ~-~hlehe:i.-:r: St;::; JJ. Con1.px:.~ny, ,3pa:'.'l'O¥lS Poiut Page 2

:.~n -~~~D f:~.-·!;..h::; :ro--T~~. io~ni~ng :~rne 13 October 1. 965

On the d:·:?.v-e h:d.:i.(;a:.s Do D·c1.dl-~y \:;;:,. ote the iollo\ving in h.5.s ST !;;.LCO ·:e -~·m.1:~::.ne1-::....::.2:~ion.s .. w·N· :.E de si,;ned he~.i ~al gca:t·s n"lade ·\v:lth good accu~:acy ca"l ca:i~:r.·y up to l 00 :t:-i2.c'·or quite :::easonabiy even v.1he::l the:-:·e az-e shock conrEtions :·_n t: .. .e systern that rr:~ay ir..t:;.·och.:;.ce lYl01TJ.en:··c:n:y c•;-e:doads of -~\VO ·co th?.ee ·;;in""le s this a:n.1oru.:.t., "

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:!'~ .U depth t ... et:.::. a:;_·e · eing 1s~d on SI'ELCO~ '\~he:n. vJe take il'!to cond.de:\at;.on tb.a-~,, nit h:.!s bee11 de~1iO:ne·t::·,;r~ed 011 :many kinds -of high­spee 1., high-accur2.c-~ gec.2:11; th2.t the :~ull dei:rth teeth ~,viE handle 20 to 25 :r:--e:-_·ce:i.1t more ~:::0\Ve .. f..1t"t.cces,sf\.;_lly- than the stub teeth 11

,;J the a.Hov;able :tl{: C,vn ~o:r high sp0ed gears is be:i.n.g de-:i."a:i:-ad beyo:t-d OU::"

sta:;.:.dc.~·ds by a :::'e~c:::or oi 2.-b~':.t 2.

TL.e PL \P s shov;r.:.t:. OL :Tig-c:.:<:e l a ··-:e h:".gho It v.ras n:~.e:Ttioned seve?..·al tin'les incus S1'ELCO disct~os5.ons thE~t at these . ..,peeds v-re ;."1i.U n.ot get co:rxectiv-0 ge .. *~ tooth .. ;::ei:-:. The speeds a1·e su:Hicient to c:;:eate c:i.J. i:7.lms betvveen the lo2.ded gear teeth" Bec~~v.se of this the xnisa!.:i gnment ( Cm facto1·) r.cn.'.st be e·;;·alu2.·.t;eda This p1·oba.b~.y Fa:rt:.y eJt:plainD the above dLfe:~:en.ce i:~: ~--atingo

Vle snouJ.d get expected spacing and profile e:::ro1· data f~-om. O'~n· ehopJ a:D.d :i:r.l;J.ke some dyna1 .1ic 1oa.d cC:l.lc:.tJationsc Ou;;.· Cv fac~ r: is for 1n0a0:t~ate d-y·:G.an :.c ... o:.::!.do Vlhat is ou.?" s~tt:.a·i;:ion?

'"J'hese o-e2.:. s ·we:..~c de::dgn.e :1 to ca:·~:r.y Z6SO I-J"""P at a Ino·~o:r. vpeed of 3 75 3.PMo ]'his is the rna:.:tn.1. :n:-.1 to:;:-qne jobt :roLing " I 4n rod at 8800 FP1vt,

105 T., D:d.vJ.ng 58 T" 3 No D., P" - S'rELCO '.f'ooth Propo:::-tio:tls 9° E'ace 14·) H·eli:t~: Angie (ove:dap~ • 2., 08) T:p Relief ( J ~}: L Gt,_tte~::-s)

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Be·'·l:len ...... :'l,. .:·~ev~ Cc:;.npc-.ny, .Spa~·:ro\-VD 7'ohr!; Page ;, ,,-! ·'---:.r-· Ge:1·, .. ..,. .--:1l .... ·'-11e r-;·,.)·-'1"""'~ ... -·. -=.;~"~.-LSh~"..,et -'iilio

.! l.~.-. ~--:. ~. __::.. <;..:...:..:::...:.:.:::_.:.:: .. :..::-_ -· .!.._.....z...~~~.:...!:.::.:.-:~:::;!_;: ~-·-:·· ., -· l8 October 19!:.5

The J ~ & L.. -- STF::::...co ·~b.~.·cc --high 1).n~:;; can he ~·wed fo:. B th~.eLer:n,

T".e :t.1.ppe::: a::.d ~-o~~,....-0::: J.h:.·~ ::;h2.f';; to:rq'lzes: \::lith the added c·~e-.ncis_, :i.:tJ.~"J:ease

011J.y 16°ia.- A.no-;:he:·: :-.-a.y o::: e~;;plcj_:r.tint; 7~:.-y- th~ thx•ee~high caJ.culates to be adequc:t, :i.G to r:.ote t:hc:-.t the 23o 5 11 po <:1 .. ·' 90 'I'o ... n1.:i.dd:~e thxec-high gea:. _c?.:r~::ieG on ;;; 1x !i--!../2:::: l ~:t of f2.ce s·:±ghd.y ~.ess load than the 9" o·Z Xt.~cc docs on tbc : 9o 9u p .. d .. :; 58 T a outpL-:t ge2.1: o:Z ·t: ..... :;l s:.:ug!.e fr~age

The desh·ed oe-.rel gca:: :ratios io: . the t.7o an sta~:~ds a::.c ":;91 :fo:r: s·;a:n.d l-o .. 1.4: and .. '-.!01 fox Sta1;d No .. 1. 5. Tne b.vo pcd.::s shown i;.1. Figure 1 ha·v-c been. sc:nt to Glee..so.n :fo:t :revi.::..vT tl.nd fc'): anrn:t.::12.::..·y sheets

D-.. .; -- -7;-,g o:,"l-;0 ... 1'"" a·"'t- Ron ~h...,·t·· P-~-n~Oil .... :~o:t.· the Ne•."l 8 1 s-::.::.;:1.ds., ~:._..::::_:::;_;_~~ ... :::_:._:::_.~~~,..--:::.::·~ •• . :: 0 ----'!;-~-----~,..., __ Research Sketch :No .. 0 f0

'"!'he dl"iving pinio:as hava 31 T .. (I a:.nd ~~:and :J:-3i16° fa ... e ·vJidths" · •.they are :f.de:ntic2.l. "'llith ti.1e STEJ:.~CO d: ... ·:hr:I:ag pi· .• ~.o:n.n ex.-.ep~: x. :1.· th0 face "i7.~'idth,.

:-f..:1e roE shai·:: l)i::ionn at•e co:n1.p!.et .!.y :,1.ev.:-o The Xa.cc \t.ddth is L.~:-3/8n ~-~~d ih'e ::.1l . .t::nbs~. of ~ee·ch j._s 3.:. TLe :.nc:·eascd Jacc vricith w&.s :1eedecl to -n~-l~e the gea1~ tee·::h equal to the s~.2ea::.· pj.n coup~--~:1g ·corqu.e.

The G.'.ITlC.Ulli: of the nelhr. n~.odi:Ecation fo:i' the 35 To :r.•oll shafi: pinicns ~B yB"t to be caiculc1.terL

su:tvl.l.viAR Y

The gc2,:;s :.to? B ~·~n:ehen1. 's :N·o-T•.vist l.7::?.:dshh'.!.g ~~:E!s a:i:'e dis ~t?.ssed :A.n this :."epo:t•t,,

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