SCIENTIFIC ABSTRACT KARPENKO, L.M. - KARPENKO, N.B.

• Document Type: CREST
• Collection: Scientific Abstracts
• Document Number (FOIA) /ESDN (CREST): CIA-RDP86-00513R000720820012-9
• Release Decision: RIF
• Original Classification: S
• Document Page Count: 100
• Document Creation Date: November 2, 2016
• Document Release Date: June 13, 2000
• Sequence Number: 12
• Publication Date: December 31, 1967
• Content Type: SCIENTIFIC ABSTRACT

ACC NR- AP6024290
The E;Wndard expurimental error is 6-13"/6. The 1-nethod is accurate, univerf;al
and fast, permitting 100 determinations in 15-18 hours. Orig. art. has:
3 figures and 2 tables. (Based on authors' abstract] (KPI
SUB CODE: 20/ SUBM DATE: 02Dec6,1/ ORIG REF: 00911
Card 2/2

KARPMO, L.M.;SKLYAROV, Ya.p.
Effect of reflex and direct sti=lation of cortical -oointB on the
secretion and composition of saliva. Fiziol, zhur. [Ulcr.] 5 no-5:
571-574 S-0 '59 (MIRA 13:3)
1, Llvovsk:Lv meditsinskiy institut, kafedra fiziologii.
(SALIVA.) -'(CIREBRAL CORTXX)

N,
366
AUTHORS: Shveykin, V. V. Dr.ofTech.Sc., Professor. Karpenko,L.N.
Eng. (Ural Poly'k-lechnical Inst., and Ghelyabf dsld3V-
Tube Works).
TITLE: An improvement of the technology of rolling tubes
from ingots. (Ultichaheniye tok"ologii prokabki trub
iz slitkov).
PERIODICAL: "Stal'" (Steel), 1957, No.4, PP-340-342 (U.S.S.R.)
ABSTRACT: Improvements in the production of tubes were
obtained by using polyhedral ingots instead of round
ones and by the application of a new profile of the
piercing mill rolls (double bevelled grooving, Fig.2b)
and of a new mandrel. Casting of polyhedral ingots
(27 and 19 faces, Fig.1) decreased the frequency of
appearance of longitudinal cracks (in 5 months the
number of ingots for 16" tubes viith cracks decreased
2.2 times). A comparison of the output of 14" and 16"
tubes, time taken for piercing and average load on the
motor during piercing with the new and previous
profiles of the piercing mill rolls is given. The wear
of rolls with the new profile decreased by a factor of
two. There are 3 diagrams.

S/148/61/000/002/005/011
A16l/A133
AUTHORS: Shv--ykin, V.V., Ivshin, P. N., Karperiko, L. N.
I
TITLE: Experimental determination of pressures and axial slip coefficient in
the piercing of large ingots
PERIODICAL: Izvestiya vysshikh uchebnykh zavedeniy. Chernaya metallurgiya, no. 2,
1961, 62 - 67
-TM:t The results are given of an experimental investigation of the axial
slip in the shell in the piercing mill process with mandrels of different gage,
carried out at the Chelyabinskiy truboprokatnyy zavod (Chelyabinsk Tube Rolling
Plant). The purpose was to find cut the metal pressure on the mill rolls andthe
mandrel in rolling with new standard roll gages ('/n 0 (UPi)) that has replaced
since 1959 the old "upi" of.1954. ingots with 547/531 and 615/500 mm diameters
(i.e, diameters of the bottom and top ingot ends) were pierced on 375 and 425 mm
diameter mandrels of "2'0" and CT-A (St.D) steel. Tae slip was studied simultane-
ously as to its considerable effect on the metal pressure and its dependence on
the pressure. It was determined by marks made on the mandrel rod and on the water
feed pipe above it, and measuring the mean time during which the shell passed every
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Experimental determination of pressures and ... A16l/A133
marked distance. The accuracy of such measurements is considered sufficient for
practical purposes. 'The results of slip measurements are illustrated in a graph.
The metal pressure on the rolls and on the mandrel were measured simultaneously.
The measuring instruments were dynamometers with wire pickups, and the indicating
devices were,especially calibrated galvanometers taken from shield-type thermo-
couples. The readings of three gaJvanometers showing the pressure on the roll
necks and the mandrel, an ammeter showing the motor armature,current5 a voltmeter
measuring the voltage on the armature winding ends, a tachometer, anda clock, as
well as two signal lamps were all recorded simultaneously with a motion picture
camera. This method is stated to be more accurate and dependable than oscillo-
graphing. The determined pressure curves are'given. The pressure is.different
in six different stages. It is shown that the old formulae (recommended in 1951)
for calculating axial slip coefficient yielded exaggerated results (2.88), As
the measurement results prove, it is only 2.0 and has a tendency to decrease in the
direction of piercing. The conclusion is made that the reduced axial slip practi-
cally does not raise the metal pressure on the rolls with new gaging, reduces the
specific power consumption and the piercing time, and improves the quality of rolled
tubes in respect of double skin. IThere are 5 figures and:2 Soviet-bloc references.
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B/148/61/000/002/005/011,
Expei,imental determination of pressures and ... A16l/A133
ASSOCIATION: Urallskiy politekhnicheskiy inbtitut (Ural PolytecMical Institute)
and Chelyabinskiy trubnyy ;avud (Chelyabinsk Tube Plant)
SUBMITTED: January 29, 1960
Cara-3/3

3/133/61/000/002/006/014
A054/AO33
AUTHORS: Plyatskovskiy, 0. A.; Candidate of Technical Sciences;
Pavlovskiy, B.G, Engineer; Karpenko, L. N. Engineer;
Starobinets, Ya. S., Engineer
TITLE: The Rolling of Thick-Walled Hollow Billets in Stretch-Reduc-
ing Mills
PERIODICAL: Stall, 1961, No. 2, pp. 147 - 151
TEXT: After replacing the piercing units of pilger mills by piercing
presses and stretch-reducing mills, the pilger-process became the most eco-
nomic method for mediur. and large diameter tube-production. To determine
the power and other parameters necessary to design the old type pilger mills
and to design new equipment, the UkrNITI and the Chelyabins4 truboprokatnyy
zavod (Chelyabinsk Tube-rolling Plant) made a study of the operation of the
piercing unit of the HTn3 (ChTPZ) type pilger equipment. The conventional
tube rolling tool of the piercing unit was replaced by working and guide
rolls of new design, (Figure 1). Diameter of the working rolls; 730 mm;
diameter of the guide rollst 440 mm; incline angle of the forming conet
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The Rolling of Thick-Walled Hollow Billets in Stretch-Reducing Mills
3030'; angle of feed: 40; dimensions of mandrels: L - 487 and 530 mm Ri:
330 and 380 mm; A = 267 and 310 mm, The hollow billets processed in the
stretch-reducing mills had the following dimensionst
576 x 350 x 1600 mm
572 x 300 x 1500 mm,
636 x 390 x 15-00 mm.
To investigate the laws of changing wall-thickness during the rolling-out
process some billets were bored in such a way, that their axis was displaced
in relation to the center of the machine. As a result of this billetswere
obtained with wall-thichnesses deviating by 25~L The torsion during rolling
was determined by longitudinal grooves (15 mm wide, 10 mm deep) made in the
billets. The metal flow was observed by fitting in holes drilled into the
billet walls 20X (20Kh) type steel screws and welding them at the contact
place3 on to the 2xternal surface, The metal pressure on the working roll
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The Rolling of Thick-Walled Hollow Billets in Stretch-Reducing Mills
and mandrel rod, the torque on the engine axis were registered by several
pickups. The oacillograph indicating the torque also registered the current
intensity of the engine, and a special device indicated the rotation speed of
the rolls. The actual. volocity of axial displacement of the billet was meas-
ured by the path covered by the front part of the billet during a given time,
while the focus of deformation was filled in with metal. The tangential ve-
locity was defined by the recorded rotation number of the front and rear part
of the billet. When calculating the coefficients of tangential slip, the
theoretical speed of tangential displacement of the billet, Vt, was determin-
ed with the formula;
JT'Px -ri, Vco-, 79_~_c _Os-2_Uj____
Vt = 06 + in-'
(DX = roll diameter in the sector investigated, in mm,-r,= roll rotation
speed, rpm; o~- feed angle, 0; W - angle (0) formed by the horizontal plane
passing through the axis of the roll in the given roll-section and by the
straight line passing at the same time through the center of the given sec-
tion anO the assumed point of application of the vector of peripheral speed
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The Rolling of Thick-Walled Hollow Billets in Stretch-Reducing Mills
of the roll. Part of the billets (dimensions 576x350 and 572x3OO mm) were
heated up to 1250 OC and rolled into tube blanks of 478x330 mm with thinner
walls, while the 636X390 mm billets were rolled on the same rolls into 558x
386 mm tube blanks. The study of the longitudinal sections of billets, brak-
ed in the deformation focus and curves of changes in the wall thickness along
the deformation focus show that maximum deformation takes plaoe between the
flange (30 mm. high) of the roll and the mandrel. The change in wall-thick-
ness during rolling was indicated by the change in the transversal rings
carved into the billets along their entire length and it was observed that
for billets, the wall-thickness of which varied between 17 and 2,q5a', tho wall-
thickness was reduced about 1.5-2.0 times. However, rolling billets, witt, a
wall-thickness not changing more than 8-10%, - showed no modification In this
respect. The main deformations of the circular screws fixed in the billet
walls Look place during processing in the stretching-reducing mill in axial
direction with a simultaneous torsion in tangential direction. The peripheral
layers flow more quickly in these directions than the internal ones. rhis
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The Rolling of Thick-Walled Hollow Billets in Stretch-Reducing Mills
also went to show the inequality of deformation of the hollow billet wall-
thickness. The angle of pitch of the torsional line varied between 12 and
360, indicating the irregularity of the process in time. For the coeffici-
ents of axial and tangential slip the following values were obtainedt
Dimensions of the initial 576x350 572x3OO 63,5x3go
and the rolled tube blank (-M) 478x330 478x330 55-3x386
Elongation coefficient 1.75 2.0 1-55
Average values of the
coefficient of
axial slip 0-45-0~55 0.47-0-56
and of tangential slip
at the input section of the roll 1.10 1.075 1-074
at the center of the flange 1.03 0.948 0-830
at the output 0-94 0.855 0-797
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The Rolling of Thick-Walled Hollow Billets in Stretch-Reducing Mills
The power coefficients of elongation and piercing showed that it was possib-
le to apply the piercing units of pilger mills to double-roll stretch-reduc-
ing (elongating)mills. Both processes were characterized by the increase in
the ratio of metal pressure on the roll at the input side of the roll to the
metal pressure at the output. There are 3 figures and 3 tables,,
ASSOCIATION: UkrNITI and ChelyabinBkiy truboprokatnyy zavod (Chelyabinsk
Tube-rolling Plant)
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The Rolling of Thick-Walled Hollow Billets in Stretch-Reducing Mills
1/2, no
J70
.0,70
Figure 1
_A~
Figure 2
Calibration of the working roll of Calibration of the mandrel of the
t.he stretch-reducing mill stretoh-reduoing mill
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The Rolling of Thick-Walled Hollow Billets in Stretoh-Reducing Mills
Figure 3
Arrangement of screws in the billet-wall before
rolling on the stretch-reducing mill
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The Rolling of Thick-Walled Hollow Billeta in Stretch-Reducing Mills
Figure 5
Change of the viall-thickness of the billet,
retarded in the stretch-reducing mill
I II I I r
r4
Cj
length of the deformation focus, mm
1-2 (11-2t)-workina sectors'of the enteriag cone
2-3 (2'-31)-idem, of the flange, without mandael
3-4 ~3:-4:~-idem, for flange and mandrel
4-5 4 -5 -idem, for the polishing sector of
roll and mandrel
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The Rolling of Thick-Walled Hollow Billets in Stretch-RoducinK Mills
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