PrRYATrh-sKr7. A. L.
1 Pr-%ence nf .0 Car'ne in the tuff""lle the COMMOVI
sprnre (1-1cra t'%CPISRT-- T--T -TT7'-'.f TE
kil K V 11111.11
11%, fic" ~i IWO-
t W. nd
n j if C .1 44 1113(7/h
,,,nvn III J-) Imples of 'PrIlle
Tint- ntone
1, in 21111 ', 4,9 rZ, f . . ..... it I" Id" ,
U(1111,
hiitro~itr, in
I- lie
and 11101, , I-iling Ou", it Unrileninir ni'LlInIA trot"
tel-Iii-ly ftt-Oi prin-c L11114 I W.
Ilitro"te ,, "Till"I": 13'
d-al-r.tren, Cbw, 170 1707*, 147 " 10% of it
nflikt nt divrntent: and I-Innotivitc, anti Con-
stittir,its 'tile oplical activity of I In On. flr4( Littiritsimts
trillcil Jmii,r than thal of I Ili :hr scronti, Which is i rv" vc1Y
firrsh it-It"Ple MchArd I Akawle
ID / x ~ -) , - " /V -~ /I I~, -)
BUGIAY, B.N., imndidat takhnichaskikh nauk-, PIRTATINSKIT, A.L., kandidat
tekhnicheskilch nauk; KORSHUN, L.L.. inzTe-ffWF-.-'
Terpone-collodion lAcquers for finiahiag furniture. DerA leiso"im.
prom .3 no.1:3-5 Ja 154. (KLRA 7:2)
1. TSentral'nyy nauchno-iseledovatel'skiy institut eekhanicheakoy
obrabotki drevesiny (for Buglay). 2. TsKILKhl (for Piryatinakiy and
Lorshun). (lacquer and lacquering)
PlIffATISINKU. A.L.; BUGLAT. B.K.1 KORSHUN, L.L.
Bev polishing ard 9oftenine agents for the refining of nitro
lacquer coatings. Sbor.~rud. TSNIIJ:HI n0-1):115-118 '5q-
(MIU 13:10)
(Lacquer said lacquering)
BUGT.AT, B.M., dak-tor takhn.nauk: PIRYRTINSKIT, A.L., kand.khtm.nauk; SHMINA,
T.I.. insh.; KOR-SlilTN. L.L.,
Mow matmriekla liand for finishIng furniture. Der.prnm. 7 no.9:1-5
s 159. (M7RA 11:11)
(Wood finishing)
v4ml -
11ORSTIUR. L.L.,, TRIPONOVA, T.V.; PIRTATINSKIT, A.L.-, HUOLAT, P.M.; SfMIIIA, I.I.
Fungicidal nitro varnishes basad nn oxyterpene resins. Der.prom.
7 n0.11:1-2 N 158. (KIRA 11-11)
(Varnish and vftrrighing) (Fungicides)
KAIARAROV, Pavel Lazarevtch; TSITTLIN. Lev Aleksandrov tali; PIRTATINSUT.
A.Z.. radaktor; ZAHRODINA, A.A., teklinichaskiy redakto
[Enduatance calculations-, reference book] Raschet Induktiv-nostel:
spravochnaia kniga. M~skva, Go@. onarg. ird-vo 1955. 167 p. (KLRA 8:3)
( Induc t an ce )
1. PIRYATINSXIY, A. Z.
2. U33R (W' )
4. Ionization
7* Jaectric puncture of tochnical dielectrice.
Zhur. takh. fiz., 22 No. 10, 1952.
9. Montbly List of Russian Accessions, Library of Congress, ?Ahrttaz* -1953. Unclassified.
1 . 'lY, ',. .1.
2. (6) )
D` -I ~ c'.r 1. -!-..
-. '.~ loc'.r! c n " ure - C tl'c ' ' '~,, : , i~ .- rl --- . ~nt-r. :'1z. 1.
J. LLEI --f Rus.:Iun -.',c -rory -,!' -..n~-res , Fe~,rw,.ry -~,, ~,,- ~-. ..
PIRYATINSKIYp A. Z.
VM/191ectricity - Dielectrics, Bre&Mown Oct 52
"Problem of Electric Breakdown of Technical D1-
*lectrics," A. Z. Piryatinskly
"Zbur Tekh Fiz" Vol 22, No 10, PP 1556-1564
Discusses mechaLiSM of breakdown if ceramics at
high frequencies. Assumption of "thermotonization"
character of breakdown of porous dielectric makes
it possible to establish a connection between
physicomechanical properties and electric strength.
Indebted to N. P. Dogoroditskiy. Received 17 Jan
1942 Zsic7-
PA 236T17
236T17
PRIAMIRTY, B.G.
Tuo opecies of Upper Jumesic Trigoniidae from vestem Turkmania.
V'est.LGU no.2-4%146-149 162. (MIn 16&2)
(Tarkmenistan-lamellibranchiata,, Posail)
I ~ A' , 'i V , v , ;~ k- .
ocl. ~4 ! : ~l I- . .. - I, I I ~ .. . . - - T, , - , - *_,, lin,4 .,~
, , ~ - - F, , % lj~ .4- ;] I . I , , :, ., I . - .,
PROZ')ROVSKAYjk. Yt-.L.; PIRYATINU IY, B.C.
Some c~-ara,toristics of upper Zal',ovian s--di7pnl,s in t.1-e Tluar-t.yr
reFi-.)n. Tr-udy V-cEGEj 46:101-IC" '(.1. (?;.: i~~ : I - , '~ ~
(Tuar Kyr regi-)n-Geology, Stratigraphic)
AY,ANNIYAZOV, K.; PROZOROVSKAYA, Ye-L.; PIRYATINSKIY, B.G.
Upper Jurassic sediments in the Kyzylkyr toundary (Tuar-t.yr r-.-j!,n).
Trudy VSEGEI 46:106-10? Iti. (MIRA 14:11)
(Tuar-hyr reirlon-Geology, Stratigraphic)
T"le Production of Vinyl Phenols ly ho atalytic 5102 60/1 321'02,',
~racklng of Some Dioxydiarylalkanea BOIIYB002
the ratalysates almost always three fractions devtlopedi I phenol; 11
mixed with ethyl phenol and p-vinyl phenol; III p-vinyl phenol with sli'7t*
admixturgs of ethyl phenol Under the -onditicr of selective cracking ar! L'
high concentration of p-vinyl phenol, p-vinyl phenol crystallized from
111 in the form of palish green lamina The yield in fraction III and the
conversion of d1oxydiphenylethane into light prr'~U(-tg Increased with a hivhp-
volume velocity of the diox-vdiphenylethare goluti-n The authors des,-rit" -7nv
(.f the most successful experiments After severhl ~rocesser! of recry.'Itni'Ll
of benzene, p-vinyl phenol crystals with a melting point of 71 50-720 were
obtained Crude crystals dissolved easily in tanzene, alcohol, and ether. ;iril
not so well in water. After left stiinding In the vacuum exsiccator, for a gh-rt
~Imn the solubility wan reduced due to polymerization. The crystals llssl.,.~P~
I ri iye turned the sol ution 1,rown . An admi x ture o f p-vinyl rY~-n'Dl to cnr-
rontrated E2SO4 gave It a vividly red color Ar admixture -1 a ferric -.,.! :--. i-
Li-lution to the aqueous solution of p-vinyl Fhenol gave it Li ~'rowrjsh Fr*,-r.
.--'or -. I i ~,!:
In the dark, p-vinyl phenol rapidly polymerizes intc ar. 1
whi te r e 9 1 n In a' protect ive gas however, I t keeps u~ to 50 ',, . r-. Ti,r t,
cra-k.ng dioxydimethylethane (ethylldene-dl-O-Cronol i r. ac , t i- ,, I
t he f r I I ow I n;r s ubs tances we r e o 1, t rt I red i r res o 1 4 - e thy I -o - (- re s o
C k r .1
; '4-
The Production of Vinyl Phunols r-y tnt~ Catalytic
CrnckirF of gome Dioxydiarylalkanes BO 1 1 'BC,
rrpqol The latter is a wtite, crystal lirp sul stance wi t~. a meltirg r
It is solutle in r ril -,:-y :-1vents , ;,nd unler the
fc rms into a sticky resin from wEi ~h aftc-r treatment ai th terizere
f 4 viny. -,--cresol I reci ; i tates in the form of an ir~issolul'Ae whi te
:;icxyJirY.er.ylprorane ~'dipheny:ol~ropane) was obtained from. a -ommercia!
~ro.!,i-t sapplied by GIPI-4 Gosudarstvennyy nauchno-issledovatel'skiy i
pr-yektryy irstItut-4, *t-4te Des IFn and Planning Scientific Research Ine t i
*j distillation and recrystallization. Cracking was the Same as above, ~Ut -A;
f')nducted in acetone-benzeno Whi t e , r c a I@ - 11 ko crystals of p-isopropery"
with a meltir.F Toint of 8~ ',Q was ot*aired from the catalysate Fxposod
e y t rans fo rmeu int:~ L, r3i romr, u I t I y so I u~ I ein organic solvents Thort-i
fiKure and ", references, 2 of w~,Ich ire S:)viet.
AZS.--'1AT131;i Institut neftekh1micheskoy i gazevoy ~romyqhlennosti in.
G,Akina (Institute of Petroleum-ck.emical and 3as
I M Gutkin),
1 3 KX T E Novemter ty A V Tnpcl,iyev, Aca~emiciar
S 17 RM 1 TTED November 19')n
ari
2016
A'-'THCRS: RY a b, U v ar.11 P ry a r. s'ir I' y
T :T LE: -he cc,.4_eneLtI:o,,. _~f acety'lene ar.~
prestn2t if :-n excctLnge resin
PER:CD:CA-': I.h',rna- ~r.?_adnoy v. ~4, nc.
_5H_ - .59-
7EX7: -_'~e a.- was 'L d1scover 7.cre eflective met~,cds of s--nte.es---
:ng 4.4Idioxyi_i,:.-ny_'et~.ane (1--pheno!) -,ising ca*a'_y_s*s con'----, , n
a merc-_~ry sa!~. ~a'=- *e Y'-'-2 wus ch-~ser.. ~._'ul.enc'_ _s --f
-Ind s
great use i:. tre syn-.I.eg.s --f rnc- e-.~'ar comrr
from tte -ondens~.*_' Jr. f u_--ty:onp Fini phpr.6-- in a e_ s an
in rtsence uf varllr_: s acli,:
rr.erc _-ic cx- de. -:.e ',es* c-_*alys' wE;s Hz.P,,, - BF.- r
t i c) r. e w as r -:, i-J i. i ~i: c r ac wvtq vi'-
I*e a e 1 /1 i1r, ~I ~~(,r-;:-y cit
.-2 5, by viel6l'-.~ sa,' wr~.s adq,_rteJ on ti.t S~:.fmt,e
Card I `
prov.'deJ with s-rrir.6 n)d, a ref --,x
f-urn,~! for El 1, d t
g ass
e ene e
no we re r ce t:.t, f-ask urd, at a temp, r~.t i-P,
acetylene was r~dr. ~-. for 4 n-,rs a' r a' e j f e r t~ -an r
When tne reaction wL.9 ver 'he "-'ask co. 'ents were e
.o separa'e t~.e '.,.e 'Lt*er wasned w ,i. a
of pi.eno__ and -_;sed ag&;.n. T uroJicts were i4iz':
;"
,er press,,_-e,
f 4 u xy I i Pl. e,.y I e ~ L ~tn
e.~ ar, d 9 mr- liC. A ser Lif *es*s vias done s4~~,-
es
ation .n --a*alys! a:~_vity dime. Acetylene ai.~ ppl~enc_' we_~
condensed a'-so i n aj-;eo _~s sci,tion at 0--c, ---ter
ing cons'axt. 41 .4 isx~,J~ *.enyle-~.;~,.ne
Own a as e ~i rm -
s d V ft: a, y .--r ry
Z
.alyst in --s r,,: ac r. , a r- ~is f Ovis tl*:C 1.9 ra. Z,~ 1
of the s f--r a *.~r7~e ~i
f J,_P~.encl is c:ns`!-rat.,y 'cwer an
Card 2'3
~401~
24016
s
Of
Orp tylene
vinen K"--, ty Y
nu
r ar. e e
-41 xy J y
re 1e
-er, ace~Ei
re I-Ir. d
P ~ ;~~ f-A T i -- L 1 Y- , i . -T .
27152. PIRY;,TINSKIY, 1. L. SHWJtTS~'~,N, 1. SH. Pr,31zvodstvo i ~,Iuzhba stalerazlivoclinykh
nrobok nn 7ivotiakh urala i vostoka. Oj,neu-~~-y, 194Q 1.0. 8, S. 340"r,.
I
So: Letoris' Zh,irn-l'nykY, Statey, Vol. 36, 1949
TH YAT 1. Lo
figs In III# 17rdli gild
,,jjy!oftjWrs ov4satcoe, it if no-plIe in
.IjV As ?A LIA P (Y(Vw.
0 w, 14 14f1 0 N(Nfli (11, pr(yfilr1lon
IfP14 Omf Im fig otor, Vflilrl. qf"f oil
"J'w if, 'b". Ih;.l
op"k 11,111
Ind
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5
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vii,06 AS SIMMONS 60 OWb from
look as 60wommi of 0% in 00 or saft 40 tnrlm"
a VWAW 1111-11011110 Us - '
OpImpi as jolevatIpo is 664th all Cv" ( .a~ W woolos
to verlmood, al getwowin tw rook" - -1
"Ittkis occo to ~ Aft"k MAb=
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so 61- - ow docii tervows bove tm
is Molob Cade IWO 61WAd
of the am"
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CMW is W, ow baby rr Z."X.
keg* but - WOW two tb" - OUS1401 00
makimalk, "am The so 'w '"'w cracks of tb
to lio brich, imona 0 ow d of the bwb olocral"In
&Z" cracks by
,b. 6xi .0 lu =." to 910 bricks
The I. ... 60
cattwo a weeodwo thi6"k 6 b a Ilf"y SPIAl Ap~
a" is wow CON" to WAG.Mto. hot, not 11
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Cblrm.) Is. 20- 10(lm) .-TIm trrlwm Par
IIL= ,Whimphis W turponflan; r"o". Isirram, Olin
sad some typo. Mae qeaWativdy asslagom to the
J I , tmrmtmw and caistalned: a-pinese. 0-pinen..
44arpow. a -~ m. Unionesit. dipatem, cad terpino-
Wam. Tm neeks - I by exbradvir hartbomations
*bowed mAy wham verjaijam el the amts. of ci~emponcnl a.
prW4ipmUy m folloss: limamew-dipmrstem mixt. 13 17',
in rwtwt timpeatime. 10% in fursece Variety. 7% in tit"
variety. mW 3% in mmUste variety. Tlar a1r. control.
cmW m CoN.,011. was: B-7, SD. 8-5. sed 3.7%. rup.
0. M. Kmoompop
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Tbw compositme CO ~bu 0 tur sh 0 t m the co~
pin . I I It-l-h- ;-! K % 11-1,
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A. L.
4 U. K. V. I Ch"n,
6F"-Wl ptoilbw- Kho.. (I- AWied Cbrin.i aj
662-4(19W) -FrOCtfismal diets and masem smajyfjl 4
Ike fre"b"I'll-of a -- 0' r"wrmtativoly takes fima Cim.
twmam turprothow gavv the falowin rompn Ali,
411--plimp". 7.61
d-l-arv".
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bsta&Xft. pnnt 11
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a# dry disim. of OW was 1-und in it
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trade b7 o4bgr procvdurm frmm JL' with Itupentan-
NUI,9 Sta"Ins M.
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PLRTATIbiSKIT. L.B.
Modifications or-proaral i=unological reactivity under arctic
conditions at various season$. Zhur.mikrobiol.spid. i i=un. 28
mo.3-65-66 Nr 156. (KLRA 10:6)
(CLDUTI,
imunol. reactions in arctic coad. Juring various
seasons (Rua))
(I KKUNOIOGY.
@saw)
"fte Problem of OwWes In General larAlmological Reactivity In
Mar Dogma at Diftwent, Period* of the loar,," by k. S.
Piryatiaskly, Zhurnal Mikrobiologil, Epidemiology, I I=uno-
)911, No 3, Mar 57, pp r, (,,'-
The author reports on experiments on 321 healthy young persons re-
W ding the resistance of the human organism to disease In the polar re-
gions where, according to a number of physicians who have worked in
northern latitudes, certain diseases have specific characteristics. The
young people were divided into three groups, one of which was tested
dwing the polar night, the other during the polar day, and the third
during both the polar night and the polar day. The tests consisted of
Injecting intracutaneously one ml of a 1 100 dilution of "so-called
antihuman serum" furnished by the MIcroblological Department of the
Institute of Experimental Medicine, Academy of Medical Sciences USSR.
Normal rabbit serum was used as control.
Two tables are Included In the article shoving the followina- for
group 1, during the polar night imunologlcal reactivity as 'owerel
positive reactivity was twice that observed durA_L,,e, ac kjolAr ~,
percent against 72.0 percent); for group 2, during the polar day the
percentage of positive reactions was not as high as that observed by
loffe and cr. wnrkers. Vio had found 95 percent positive reactions; and
for SrOUV 3, aurLrZ .ae polar night increased reactivity was found in
55 of the 80 people studied no change vas apparent in 22, and reactivity
vas lovered In 3 cases. (U~
PIRYAzf:v, U.I.
Investigating contact friction forces In the center -)f deformation
in rolling. Izv. vya. ucheb. z8v.; chern. met. 7 no.1:100-106 '-)4.
(MIRA I't2)
1. Ukrainakiy nauchno-issledovatellskly inatItut metallov.
--, ~ " , 'V : , .. ., ." . I Z - L -, . ; - , .,.I F , -'. T .
, ~ - -r. -: , '- . :T , r. ~' ' ' F
~~ *, . , , - - . T-. - p- 7. - . a - '. ' -. ' 3 " - -
~ . nr , . 56 , * r-~; ; . , ~~l , %~ - . t ~,- " k, : " - . I
DOLZHENKOV, F.Ye.; KRIVONOSOV, Yu.T.; PIRYAZ.P-V, D.I., U~,CRFF,. F,R.;
BAT'. Yu.1.
ProductJon of bimetals by *.he vacuam r-,'.',.Ing metinod. Me, .
I gornorud. prom. no.3:34--35 PY-Je '64. (MIRA ~7: 10)
A p L6t ) 09 '.~ -)6 S( )I IWV C( )DE: t
L ri,. ujiuso% Pir,,-u zov, D. 1. BL C, Yu.
S( I-.: Iwf. zh. Memllurgiya, Ah,_ 12i)7~,
V: Sh. tr. 'k_*~r, n. -i. in-(
'~C 'i A( js: i) ill) cta I, III I ~ta I ro I I I I Ig , t I t~( 'I I III I 1, 11 a I I K, I I St oc:
Tho I-'[ I"I., OW N-it-MW.. P'~ALVT k
I )i ni c-_& i i s Jw )'( ' . A ! h igh r t t - 1111 ~( I-% : 1. r, , L, ~ I I 1 1, ;1 ~,. - I I , . i , fo r,." I . I I , r r
it 811,ce a fecl c.L."c in icn~iwrwiio tt. I ,,I, I rp I isc i:1 ii
w c ur re n c o f ot , I, s id I I 1- .1111 1 r I t I I I I I T- 's ,, f I n th 0 i 11 s .1 . I I rs
CO 11 t v:1 t Of S t OC Ad VI - I-SC I Y A f[VC t 6 U) t, c , d I t -.L, lo 11 T I , ;,[Id II. it I," dt.L~I
-W ILI, a lowo I C litclit ali tho lm!w-lap-r N,.( . I I .1111c [ 1, )1. In R L1,1111-clati.: v I I'd mc j
U'UL'Li,)r. of area ujntribuW to Uic decrease of Uw tram.ition tooc (if Ow iet-l Ti itiriw~_,.
It di-,
of t-wk-layer and sandwich 1gicks with U)t~ P-platei At, ific
C.,d 1/2 UDC. 6211. 771. 001
ACC NP. AR&0!),~)6
of layers in c 1-(-ases w I Lh it,(- ro i,;c i ri 1()rl (If I rf a.
zlic Ti decre-ises. its defomiation resistance Amngcs, iml tl-,is lvivt.'i
nonwiiformity fa(-ti)r of t1w plastic dcf,)i-n..-tt1()1I of Lbe pack. '11w 101-oadc1ling0 r
I.,ice oi the igick is insignificant, ivaclmig it.,, ijii-xinium at tlic intefface. '11w I clatiorl i': i:ck I
fic pressure and torque to reduction in ai-ea, tem1wratm-t-, thickness ratit.) aj,,d o1jivi, L ctol""
is InVesLig.LLUKI. 9 illustrations, I Lible. Bibliogralai) (if 6 tiLles. L. Kochenova.
Of abstr,-ictj
SUB CODE: 13, 11
Cord 2/2 ~j ____ ____
S/137/62Vooc/ocl/079/23-
A060/AIC,
AVrHORSr Piryazev, E. '., oolubov, M. M., Dabagyan, I. P., Timofeyev, D.
M-3leshko, A. M.. Kovy-nev, M. V.
TIME: The rol- separating force of the metal and the loading of the main
motors In the -ourse of rolling on the thick sheet mil. 2800
PERIODICAL: Referattvnyy zhurna:, Metallurglya, no. 1, 1962, 4 - 5, abstract ID21
("Sb. tr. Ukr. n.-I. In-t metallov", 1961, no. 7, 165 - 17)
TM ':he !.he power ~ondltllons for rolling at the ttilck-
sheet mill 280C -,f th- Plan' Imer! The mill Is designed for rolling
sheets with thickne-;s 6 - 'I'- mm, widtn 2,50C - 2,600 mm- It consists of a stand
oilth vertica: r:,.-s, a rcugning *w(.-t-'gn sl%nd wltn working rolls 1,150 mm dia,
a universal fin!shing folr-%gh stand 8M//1LL-'-)C. The stands are arranged in a
sequence. The rril appara'Ing force of the metal In the roughing and the fni'sh-
Ing stands was measired by means of f,-)rce me~er-6 with wire tensometers. The
force meters were w,4i~l---~d t, the pedesta1s ,,f the working stands on the side of
lr!ve. The pli1ses f-,-m '.he 1--insome*ers were rec,~rded by a magnet ~,s-
:-i'.Iograph 110B -4 (POF-14). A f 'he f,-r-es fr,-)7 ~he .as
Card 1/ 2
3/1371162VOO- 'cc', -)i 2'r
The ro: - s-?pa, a- ng f -_-e An6C,'z * _' :
irr! ed ;u' %-r If; -i ie* -irm I ned --y ~r.p f - r,e m6ters. rhe mean -s-
5ures were A'a"ned exper"Menta."Y. :3.nA , *-anP
ously witn the meas-re-nant -f '~ie f,_~rces. tne -pera'ior Df the main dr!%re mcctcrs
was os-1:1.lgraphel. T'~, e re-3rded t~.e ::urrent, voltage. and
number J revol,tlons +he nc'jrs. 7he inves+lgatlons have demonstra'ed tria-:
1) *he s-para* Ing f f *.,p meia. -.n the r:'.Is of tl~e four-hie, stwnd Is, '7.
a. the ases t--w - e admIssitle: tne -losesl~ agreement wt*n
.he exper'mer.'a: cla*a Is Zl-n Ity ':.e -:a*ies ~f 'n mean Fressares as ca:--*a-~
by tne 5,-, CV!n-T,+_AK.1,-, m-tn~xi; 3) *nt- main m~t_rs cf t1he mil'. 2&"~- are n2*
util!zed fu_
G. Grlg-,ryan
r
ans _a* 1
LAbstracler'F no'e. -".np c-
c ar-i Z, ~
PAVLOV, I.M.j PIRWEV, D.I.
Axial stresses In the cold rolling of pipe. Tr,,;dy Inst. met.
no.4:134-140 160. (MIRA 14:5)
(Rolling (Metalwork))
(pipe mills)
L 29809-66 FTI/ExPW IJP(C) JD/HW
ALL Nxi AIW20871 sotjwE com-t iTRfo383/66/ooolo-o-lTo~-632[oo341
AMIOR: Ilryazov, D. 1. (Candidato of technical soiences)l Khoroshiloy, H. H.; b7
KrivonosdV-,-M-.-9; I -- evLA. I*; Shullga. Yee Ast SytBOW JI-e-Ve
0:13: none
TI71A' : Variations in the thickness of clad sheet
-34
SOUAG-": 11ota.11urrLchooltaya i gornorudnaya pror7shlennoutt, no. 1, 1966, 32
TO1'1C TAGS: w~tal clMdinf,, shoct mtal, wtal rolling, motallurr~ic furnace,
Uiorral conduction, stool/OKIL13 stool, 10117M312T stool
A '15? 1ACT: The authors discuss the variations in thickness of two-layer stool
caused by a combination of variations and nonunifornities In the thickness
of the Individual slabs which ~tako up the pack. These variations may reach
+20% of the nominal value in individual cases. Variations in the thickness
Zas determined for m,~ss produced sheets with a cladding layer of Khl8NIOT,
Kh17N13M2T and OKh13 steel. The variations in thickness and deviations from
Z
~o"" ue w-e-re--s-tudied during rolling of bimetal shoot from packs weighing
less than 5 tons (smaU packs) and from packs weighing 10-12 tons (large
packs). Shoot rolled from large packs shows less variation in thickness than
that roUed from small packets. This is because the large slabs were hot when
they were fed into the continuous furnaces and were therefore heated more
uniformly. However, completely uniform heating war, impossible even in three-
zone continuous furnaces. The following furnace conditions are recommended
Card I UDC: -621.9-419*004
L 29809-66
.r-ACC NR,-- AP6020871
for reducing variations In the
Temperature of upper and lower
1300-13100C; temperature of the
heating time should be divided
for soaking.
thickness of plates rolled on the 2800 mill.
sections in the Joining zone should be Identicalt
soaking zone should be 1260-12700C. Total
into 40% for preheat. 30% for joining and 30%
Experiments showed that planing the slabs on both sides reduced variations in
thickness up to approximately 20%. The lubricating interlayer has a low
thermal conductivity and impedes heat exchange between the upper and lower
parts of the packet during heating which prevents temperature equalization.
This CaUSOS variations In the thickness of the finished sheet. It was found
that the absolute variation In thickness increases with the thickness of the
sheets. The relative variations in thickness are approximately the same for
sheets of an thicknesses with the exception of 16 mm sheets for which variations
are somewhat lower. In 80% of the Cases. deviations from the nominal thickness
vary within lirdts from -10 to +12%. The following recommendations are given
for reducing deviations from the nominal thickn*ss using existing equipmentt
reducing variations in the thickness of initial slabs too +2 mm by eliminating
bending or by laning on both sides; increasing thickneso of the upper slab in
the pack by Was compared with the lower slab; heating the packets in continuous
furnaces with ual temperatures for the upper and lower sections in the Joining
tons, a te;~rsco of 1260'C In the soaking sone and holding In this son* for
301 of the total heating tin*. Taking part in the work of the article were TaN32
specialists L. V. 14oarilrov, V. A. Uetimnko. A. V. Tkachov and Ko=mv%&rvXYY 19t-alu
specialists So R, Sarkiffran and A, No Nesr& Origo art, has: 4 fie
1.1 / SUIM DAM nonn
PAVLOV, I.M.; PIRYA7EV, D.I.
Investigating complete presemre on rolls during the cold rol'in
I
of pipe. Trudy Inst. met no.4:141-149 160. (MIRA 14:55
(Rolling (Metalwork)
( Pipe mills)
I.-T i, I]? it v I C) v till
Invest Ivat loll o I I h v I a I I I I essul e Okit 111~" k old
Ito I I ing ( ~ (, I d it ed uL i tig o I tibes
.-MUoIL %L: -hademiya nnuk -, 11. Itist itut metal lurgii.
Frudy , No - it , 1900. diet a I lurgiya . met al lov vdeni y e
fIZIko-khimicheskive metody i I Pdovan i ya III 1- 149
_at IOn %,*CIS t 0 q t Ud~'
TEXT lhe object of thc- present in,. L Q
the effect of %.irLous pararlietef .4 of the roll i rig proc t- N on t h e
pressure exerted on the roll-1 1 111 1 rig c a I d ir ed uc i n g o I tlibes milde
of aluminium ill (\N' 1) 1 i I s
L - 62 on d "3 1 1 t) v In't I I S I I v e I and oppev I 1 1:-
2 11 1
75 \Ii ci ,et t, u. -1 1 n i tic, exper iment d the invasul e-
..ents were c.,ir t i ed out %.;i t h t lit, a i cl u I f at bon pr essur v c' a i i y, e -,
accommodat ed i n the housing, of ( lie rolls the e I ec ( I i c a I pu I s es
generat ed by t lip gauges bei rig rec orded by a 14-loop oscillograph
I'ic 14 ( rob - 1 )he long-to
rm object of tire invest igat ion was
to gather diita that could be utilized for- impi ovoment ol the roll
Card I/ ) 2
/ k,.!L:/ ~Io
191i 161
liv es t i g a t i o n o t h t. t II v t L 11 ~4 k o (?o t1 Q
C o I d I?vcIu( trig ) t I ki 1) v
pas d es i gn devel uped at i% a f edt a 1) o Is. t k I 1 11 5 t I t ti I S I. a I
( NI , - . i c a I do I I ing Dvpor-t ment of I h - t c v 1 11 - I I I it v ) i u t
Ond e J'.k ~' S e 5 1 11 t 11 #-, r o I I - 'A' C-0 I il t 1) 4. ),1 v !- I, lit 1 11", (-S t I c o t 1 0 11 W v t
a t ed f t cim t tic I o i inu I i(, d k i e t 'x o vI
and
it
II t v t I I L 11 111111 Ot 1 11 L~ 1 10 1 ?1 Of t 11 v J),js
C a d
S/509/60/000/004/011/024
E193/E183
Investigation of the Total Roll Pressure During Cold Rolling
(Cold Reducing) of Tubes
tz - wall thickness (mm) of the stoc k tz/ttp- total
reduction in the wall thickness; t - length (mm) of the reducing
portion of the pass; x - the coordinate (distance from the wide
enO of the given point of the pass (mm); nj and n2 - constants
(ni = 0.64, n2 Formula (1) was used to design the
roll pas5es for mills KhPT-21 is and KhPT-75, formula (2) having
been used for the two other mills. Some of the results obtained
during rolling of allay AMG (mill KhPT-32) through a tapered pass
34 x 3 - 23 x 1.0 mm (elongation uo = 4.32, feed m = 8.0 mm),
are reproduced in Fig.1, %-;here the roll pressure 13F (kg, left-
haad scale, lower curve.) and the decrease ntx (mm, right-hand
scale, upper curve) in the wall thickness are plotted against the
distance x (mm), from the leading end of the pass. In Fig.2,
J)" (kg) is plotted against the distance fp (mm) from the leading
M6 of the pass, curves 1 and 2 relating respectively to the
forward and reverse movement of the rolls of the mill 101PT-75,
iised for rolling alloy D-16 through a 4-zone pass 54 x 4 -
Card 3/12
S/509/60/OC)O/UO4/011/024
E193/E183
Investigation of the Total Roll Pressure During Cold [tolling
(Cold Reducing) of Tubes
35 x 1.75 mm (m 7 10 mm). In Fig-3, Pj (Irg) during tile forward
movement of the rolls (mill Khi-"r-li" used for rolling copper
througli a pass 40 x 2 - 27 x 0.8 mm) is plotted against feed m
(mm), curves 1, 2 and 3 relating to rolling to attain elongation
'~L. of 3.0, 3.9 and 5.6 respectively; the variation of PIE
during the reverse movement under the same conditions is similarly
illustrated in Fig.4. Tile effect of elongation, V10, is
illustrated in Fig.5, where P-L during the forward movement of
the rolls is plotted against 1.Lo, graphs (a) and (b) relating
respectively to points at a distance of 99 and 140 mm, from the
leading end of the pass: the graphs were constructed for alloy D-1,
rolled on mill KhPT-32 through a pass 311 x 3 - 23 x I mm
(m ~ 7.9 mm). Fig.6 shows Pj, (at x = 177 and 53 mm) as a
furiction of the absolute deformation Lt (minl. the data 11avirig
Oeen obtained during rolling of alloy D-1 oil mill Klilyl'-32
(u, = 4.13). Fig.7 shows PT, (at x z 201.5 and 59-5) as a
function of the relative deformation C~t/t x 100 . th(I curves
Card 4/ 12
b/ OVOI 1/0
El )3/Elb3
Investigation of the Total Roll Pr essure During Cold Rul ling
(Cold Reducing) of Tubes
having been constructed for copper rolled through a pass 3~-' x 3
20 x I min (~'o = 4-')5)- In Fig. 8, Pr at x ~ 94.7 mm (curve 1)
and x = 235.7 ram (curve 2) is plotted against the wall thickness
tz (MM) of the stock, this graph relates to brass 1-62 rolled
through a pass 36 x 3 - 25 x I min ( f orward movement ). The
results reproduced in rig 9. where Pj~ is plotted agaijibt the
rolling s peed n ( r ec 1 proc al r VVS/1111 11 rel at e t o a I I o y A.M Ca
rol I ed on mi 1 1 MiVr - -)-' . t brough a pass ~-'J x 7, - 18 x 0 - 8 min
(m ~ 7 8 mm ) Final ly . the results of lUtIr icat Ing tests are
r eproduc ed i n F i g, I k, wh or e P5; is plotted against various types
of lubricants used in the rolling of brass L-b8 on mill KhPT-Y'V'
through a pass -56 X 3 - 211 x I min ( ~,, 4 65, m -- B.-) mm),
curves I and I I relat ing t o the fociiard and reverse movement
respect ively. The type of lubricant is shown as fol lours: open
circles oil/graphite mixture, full circles - solidol; full
triangle emulsol, ful I c irc I e (on t lie ext reme I eft mineral
oil. The following conclusions were reached.
Card 5/12
E193/EI65
Investigation of tile Total 11ol I Pr e9surp During Cold Polling
(Cold Reducing) of Tubes
(1) Irrespective of the size of the mil I and type of alloy rolled,
more faVOILrable distribution )t the roll pressure along the pass
is obtained if instead of a 4-zone pass a tapered pass calculated
from tile formulae (1) and (2) is used. Since tile maximum roll
pressure in a tapered pass Ls 1. 5 times lower than that in a
4-zone pass, the introduction of the former in industrial pract ice
should increase t he out put of' the mill and improve Lhe quality of'
the product . (_') A two-told increase in tht~ feed increases the
roll pressure by a factor of 1.3-1 5. (-~) 111 1011.1jig tubes to
tile final P-11 thicl~nesb _- I 'P mm, I ht- increase in tile roll
pressuru due to increased teed is ap-roxiinately tile same as that
due to increased elongation, when the final wail thickness is
be I ow I . 3 mm the eff'ect of elongation becomes more pronounced.
(4) Doubling the wall thickness of tile stock increases tile roll
pressure by a factor of 1.~' during tile forward movement, and by a
factor of 1.3 during tile reverse movement of the rails.
(5) Within tit(, range of the rolling speeds studied
Card 6/12'
S/509/60/000/004/011/024
E193/1-,183
Investigation of the Total Roll Pressure During Cold Rolling
(Cold Reducing) of Tubes
(10-80 reciprocal revs/min), the roll pressure remains practically
constant. (6) Best results (lowest roll pressure) are obtained
when an oil/graphite mixture is used for lubrication. However,
this lubricant is difficult to remove from the finished product,
and the application of emulsol or solidol is recommended instead.
There are 10 figures, 1 table and 4 Soviet references.
P,
Fig.8
t3, AW
Card 7/ 12
S/509/60/000/004/011/024
Investigation of the Total Roll .... E193/F.183
Pe-,*j
jum
PW
&W
4re
A=
a
X. -
Fig. I
pe, A:
IS= I
zom
MW
Wau
M
m
JV - OV Alm lie --m- " "I /X
'A.-
Fig. 2
Card 8/ 12
S/ 509/60/000/ 0011/ Oll/ 0211
Investigation of the Total Roll.. E193/483
pe'"
,,YAW
HXV
Zhou
ZZOM
20me
16MV
fzav
Card q/ 12
zom
24MV
z=
zmV
9zw
120W
-Ixxz,
4 6 5 fu
M.
Fig. 4
S 8 w
07,,W,W
Fig. 3
S/509/60/000/oo4/oll/024
Investigation of the Total Roll ... E193/Ei83
p *JI
Me
'OW
SAX
8au
7XV
Aff
Jw
Fig. 5 a 6
Card 10/12
5/509/60/000/004/011/0211
Investigation of the Total Roll.-EOVE183
Pcr
;V ['FTC. 6 3MICUUUM PE OT At V11C 31MRCHMOCTI. PI: (PT al-100 11PR
Fig. 6
Fig. 7
0 V 420 41.70 V,c Z.Fe am-
/Z 10 IN IN
41 '/W %
t
Card 11/12
S1 5 og/6o/ooo/ oo4/ oil/ 024
Investigation of the Total Roll .... E193/EI83
Fig.9
P,F.
Rem
7OX
4e Sa fe 761 6V
Fig.10
Card 12/12
~ :~ - . , . I .
-) . s * r : b, *- - . . .- .. , * ~:; *, !, . I
def nw t,.-!r. g : , . I S 1, r . - - - -,. .",I pq I- , 1. .
PAVLOV, I.M,; PIRYAZEV, D.I.
Unit pressure in the cold rollinp of tubes. Trudy Inat. met.
no.41123-134 160. (MIRA 14:r)
(Pli,e mills)
f- K-!
'r -7
a T
-n -A
;i q
re q
Tr A
-1,7 X
.7
K T
7 r I~T e.
PIRYAZEV, D.I.; kLEKS#IIDROV, P.A.
Unit pressurea in hot rolling and the analysis of formulas and
methods for their determination. Trudy Ukr. nauLb.-isBI. inst.
met. no.6:157-170 160. (KIRA 1413)
(RoUing (Met-&lworx)~---
111HYAZEV, U.I., kind. tekhn.nauk; Wl.UFOV, M.M., Inth.; IiAbitGYAN. I.F., inz~.;
TI?OFEYEV, D.I., inzh.; KELESH).0, A.M., inzh.; hOVYNEV, Y-V., inz~.;
Prinimali uc)-astiye: VOLCHER, F.R.; SCAULDY, b.A.; Y--
Metal pressure on rolls and loadinF of the main motors durinp tl,f-
operation of 29rO plate rolling mills. Trudy bkr. nau&.-issl.
inst. met. no.7:165-176 '(1. (MIRA 1-4:"1)
(Rollinr mil's-Electric drivinf)
PIRYA""EV, D.I.
Investigation of 611;'Ang, contact fr1ction and forc,~-.s in the
deformation center. Trudy Ukr. nauch.-isel.in.9t. rrpt. no.6,17'.-
179 160. (MI"tA 14:3)
(p.olling mills) (Defomations(Mechanirs) ,
S/509/60/000/oo4/olO/024
E193/E183
AUTHORS: Pavlov, I.M., and Piryazev, D.I.
TITLE: Axial Loads in Cold Rolling (Cold Reducing) of Tubes
PERIODICAL- Akademiya nauk SSSR. Tnstitut metallurgii.
Trudy, No. 4, 1960. Metallurgiya, metallovedeniye,
fiziko-khimicheskiye notody issledovaniya, PP-135-140.
T EXT: Many of the mechanical failures, encountered in the
cold-reducing process (seizure of the stock, bending of the rod
supporting the mandrel, excessive wear of various parts of the
feeding mechanism) are caused by axial loads which, in addition,
constitute a factor limiting the protective capacity of the mill.
It was for these reasons that the present investigation,
concerned with axial loads in rolling non-ferrous metals and
alloys, was undertaken. The measurements were carried out on
cold-reducing mills Xfl7-11'/211 (KhPT-11/2") and XnT-2-1/2"
MPT-21/2"), used for rolling copper and brass tubes. The
axial loads, acting directly on stock, were measured with the aid
of carbon pressure gauges, mounted in a special dev ce attached to
the end of the stock. In the case of mill 1-101 1 )2, only the
Card 1/ 9
S/509/60/000/004/olO/024
E193/E183
Axial Loads in Cold Rolling (Cold Reducing) of Tubes
compressive loads were measured; the device used during rolling
on mill KhPT-21/2" was designed to measure both compressive and
tensile loads. A general view of this device is reproduced in
Fig.1, which shows a cylinder (1) to which the stock (2) was
rigidly attached, and flanges (3) and (4); the compressive loads
were measured with the aid of three carbon gauges (5), similar
gauges of the membrane type having been used to measure the tensile
loads. The electric pulses generated by the gauges were recorded
with the aid of a magneto-electric oscillograph 11o6 -14 (POB-14).
In addition to the axial loads, the roll pressure was also
determined. In the case of mill KhPT-1-1/2", the measurements were
carried out during rolling of copper and brass tubes through six
different passes. Mill KhPT-21/2" was used to study the
variation of axial loads during rolling of brass tubes through a
tapered pass (61 x 6 - 36 x 3 mm) and through a 4-zone pass
(61 x 6 - 38 x 3 mm). Some of the typical results are reproduced
graphically. In Fig.2, the roll pressure, P M (kg, left-hand
scale) is plotted against the distance, x (mm) from the leading
Card 2/ 9
S/5oq/6o/ooo/oo4/olO/024
E193/E183
Axial Loads in Cold Rolling (Cold Reducing) of Tubes
end of the pass, curves I and 2 relating to the forward and
reverse movements of the rolls respectively. Similarly, curves
3 (forward movement) and 4 (reverse movement) show the variation of
the axial load, Q (Icg, right-hand scale). The results,
reproduced in Figl, relate to copper tubes rolled on mill Khjyr-lz'"
through a Pass 40 x 3 27 x 0.8 mm, the other rolling parameters
being po (elongation) 3.9 and m (feed) = 8.3 mm. The results
for brass 11-66 (L-66) rolled on mill KhPT-21/2" through a 4-zone
pass 61 x 6 - 36 x 3.0 mm (iio = 2.9, m = 4 mm) are reproduced in
the same manner in Fig-3, except that in this case P~ is given in
tons. In Fig.4, the axial load Q -L (kg) is plotted against the
distance x (mm) from the leading end of the pass, curves I and 2
relating respectively to the forward and reverse movement during
rolling of brass L-68 through a tapered pass 61 x 6 - 36 X 3 111m
(ilo = 3.5. m = 4.0 mm). The combined effect of' the variation of
feed, m, and elongation, pot on Q-F (kf) during rolling of
copper (reverse movetnent) on mill Khpll,-l /2", through a pass
40 x 2 - 27 x 0.8 nun, is plotted against M (mm), curves 1, 2 and
Card 3/9
S/509/60/000/004/010/024
E193/E183
Axial Loads in Cold Rolling (Cold Reducing) of Tubes
3 relating to Po = 3.0, 3.9 and 5.6 respectively, see Fig-5).
In Fig.6, QZ (kg) during rolling of brass L-68 on mill KhPT-11/211
through a pass 36 x 3 - 24 x I mm (~Lo = 3-9) is plotted against m
(mm), curves I and 2 relating respectively to points at a distance
of 154.7 mm from the leading end of the pass (forward movement) and
126.7 nun (reverse movement). In the final experiments, the effect
of various lubricants on Q5 was studied. The results, obtained
during rolling of brass L-60 on mill KhFIT-11/2" through a tapered
pass 36 x 3 - 24 x I nun (40 = 3.9, m = 8.3 mm), are reproduced in
Fig-7, showing the variation of Q-Z due to change of the
lubricant, curves I and 2 having been constructed for the forward
and reverse movement of the rolls, and the experimental points
relating to an oil/graphite mixture (open circles), solidol (full
circles), emulsol (full triangles), and mineral oil (full squares).
The main conclusions reached by the present authors can be
summarised as follows. (1) In analogy to the roll pressure, the
axial loads during cold reducing of tubes vary along the pass.
The axial loads during the reverse movement are considerably higher
Card 4/ 9
S/5oq/6o/ooo/oo4/oio/o24
El 93/E183
Axial Loads in Cold Rolling (Cold Reducing) of Tubes
than those during the forward movement rolls, constituting 8-loo,,o
of the roll pressure in the former, and only 2-5-6%' i~ the latter
case. If, therefore, seizure of the stocIr occurs, it probably
takes place during the reverse movement of the rolls.
(2) Two-fold increase in the food incronses the axial loads
1.3-1.8 times; a similar increase in the wall thickness of the
stock increases the axial loads by a factor of 2.3.
(3) Minimum axial loads are ensured by using an oil/graphite
mixture for lubrication; mineral oil. used for this purpose,
raises the magnitude of the axial loads to its maximum.
,niere are 7 figures, 2 tables and 2 references: I Soviet and
I German.
Card 5/9
S/309/60/000/004/olo/o24
Axial Loads in Cold Rolling.... 9193/E183
Fig. 1
219
AW
Am
MW
IN
L
Ing
rI- I
M 6v
Fig. 2
NX
67W
W9
W /it? Ix 140 zea 11,747
Card 6/9
S/5og/6o/000/004/010/024
Axial Loads in Cold Rolling... E193/E183
Re, 07 Ri'm
42,A.
.V, 4
46
IV A7 fZ47 teo, '(40 Xv 17M 4M 4ea
Fig. 3
14tv
fix
fix
IX
c it MI fop W m im AM
zow
Fig. 4
Card 7/9
5/509/60/000/004/010/024
Axial Loada in Cold Rolling... E193/EI83
43, AI
j7x
ZWO 1
fox
Afm
14M
47479
149619
sm
Fig. 5
42,*j
Zia
AV
Z2VO
2M -
/Z99
8w
40
817
Fig. 6
Card 8/9
S/509/60/000/ooli/010/024
E193/E183
Axial Loads in Cold Rolling (Cold ]?educing) of Tubes
4r, *j
IMM I-
&Z
224717
Mo
069
Agov
Fig. 7
Card 9/9
Am? cw4,.?,+,v
uU'1/ooq/o~-';t
AUTHOPS Pavlov , I and Ili ryaze%; D I
TITLE: Spec if ic Pr essur e in C o) dPol I ing (Cold Reduc ing ) of
Tubes
PERIODICAL. Akademiya nauk ShSil. In-it itut metallurgit
Trudy, No.'I, 196(1 MetallurgiYa metallovedeniye,
fizilio-IthimicheskiN-v metody issledovaniva, pp 121-134
T FIXT Problems such as the dpteiminat ion of the roll
pressure in tube rolling toll pass design, and as-;essment ol the
degree of wear of various 1) a t t s -) t t 1i v t o I I i i i g m i I I . b ec om v
eas: r,r to deal with if dat a o n t h v m a ~~ n i t u d P % tid d i s t r i b u t i o n o f
specific pressure are avai In h I eand it it is known how these
parameters are affected by other viriables of the process.
Since the only experimental data on thi,, subject are those due to
Yu.F. Shevahin (Ref.5) the invest igation described in the piesent.
paper was undertaken in order to study the effect of feed.
elongation, and the magnitude of absolute and relative deformation
on Lhe specific pressure and its distribution along both the
deformation region (contact zone) and the roll pass (reducing
Card 1/10
.:)/ -,(V()/6o,(oOO/UO'j/()Oq/O:.,tj
F I W'/E I,,,
Specific Pressut e in Cold Pol ling t( oid Reduc ing) of Tubes
groove ) . in addlit Ion , the average magni tude of spec it ic pressure
Was determined, and an at tempt was made analytical ly to solve the
problem of distribution of pres5tjr e in the delormat ion region.
The measurements of the spec it iL pr e%sure were c at r i ed out und er
industrial condi t ions un a c old- i edlic i n z in i I I ')(('. -, - -) ~-' ~ kliivF - -);-) ) .
Specially designed rolls (300 llItII In (IIIIMet er ) pVttlllt t Od Lill (-( t
det ormLnat ion of t lie pre.-stii c. at 4 ix pcint - of ilie pass wit h t, 11 e
aid of six carbon pressuz (, gauges of the merribrant, t I* Ilie
constructed bv TsNI 11AA-)h U I g . I Rhows t lie expanded pass w I t h
t lie loc at I Oil of t 11 P pt- es ski I e gatig (- I Ild I L .1 t ed by (lot 's arid t lie I r
distance from the wide end of the pas!n given in ilim. Lach of the
two semi -r. ircolar rolls tliree of these gautzes In tile
manner shown in Fig -'. Al I gatiges were lo(ated in the plane of
the crown of tile pass t lie prob I em of d 1 -, t. r i but i on of pr essi-11 e
across t lie groov e bei rig out s i Lie t lie sc ope o I t I, i % i riv es t i y
,at I oil.
The electrical pulses generated by the pressure gauges wer e
recorded on a photograph i c f i Im w i t h t lie a id of a magnet o- e I ec t ric
oscil I ograph n- 14 ( POB- 14 The groove arid the mandt el were
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5/90c)/60/000/004/009/024
EL93/EI8-)
Specific Pressure in Cold Rolling (Cold Reducing) of Tubes
designed to give a pass which tapered from 34 x 3.0 to 23 x 1.0 mm.
The pressure measurements were carried out during rolling of tubes
of a I uminium a l I oys r- ' - (ANG) ,I (D- I) and a -I b (D- I b) - The
stock (33.2 outside diameter 3.0-5.2 nun wall thickness) was rolled
to the following final sizes 23 x 0.75. 23 x 0.83, 23 x 1.0,
23 x 1.1, 23 x 1 5, and 23 x 1.75 mm. Both the roll grooves and
inside walls of the tubes were lubricated with mineral oil. The
magnitude of feed was determined from the number of reversals per
100 mm of the length of the stock rolled. Owing to the
difficulties encountered in measuring the pressure at normal
rolling speeds a speed of 10-12 reciprocal revs/min was used in
the experiments. In addition to the specific pressure, the total
roll pressure was measuied with the aid of a gauge accommodated in
the roll housing. Preliminary to experiments proper. a formula was
derived for the critical angle, P. in the plane of the groove
crown, and the values of this angle and of the contact angle go.
were calculated for various feeds, M- It was shown that at
small m (e.g. m -- 1.5 mm) < 00 for the entire length of the
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