JPRS ID: 8429 TRANSLATIONS ON EASTERN EUROPE AND ECONOMIC AND INDUSTRIAL AFFAIRS

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• Collection: JPRS
• Document Number (FOIA) /ESDN (CREST): CIA-RDP82-00850R000100040065-5
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~-UK UI-I-1l,lAL U5~ UNLY
~p~s L/a4z~
30 April 1979
~
TRANSLATIONS ON EASTERN EUROPE
- ECONOMIC AND INDUSTRIAL AFFAIRS ~ ~ ~
' (FOUO 7/79)
. .
~
U. S. JOi~lT PUBLICATIONS RESEARCH SERVICE
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= JPR5 L/84?9
30 April 1979
+ TRANSLATIONS ON EASTERN EUROPE ~
ECONOMIC AND INDUSTRIAL AFFAIRS
(FOUO 7/79)
CONTENTS PAGE
- CZECHOSLOVAKIA
Mechanized MoUile Coal Mine Support Systems Discussed
(J~n Oatrihon; TECHNICKY TYDENNIK, 6 Feb 79)........... 1 =
Mechanized Plant Transport, Industrial Robots Diacuesed
(Ivo Bernard; TECHNICKY TYDENNIK, 20 Feb 79)........... 5
- a- [ I I I - EE - 6 4 FOUO ]
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CZECHOSLOVAKIA
MECHANIZED MOBILE COAL MINE SUPPORT SYSTEMS DISCUSSED
Prague TECHNICKY TYDENNIK in Czech 6 Feb 79 p 6
[Article by Eng Jan Ostrihon: "Modern Mining Technology"]
_ [Text] Deep mining of black coal is imporCant primarily because it fully
covera the domestic con~umpCion of coking coal and its export. Its -
further development is limited because of mining difficulties encoun-
tered due to worsening geological conditiona espec~!.~lly at depths of
= about 1,000 metera, eaddle aeam strata in the OKR (Ostrava-Karvina Coal
Basin) and the neceasity to exploit to the fulleat coal depoaits in
narrow seams 0.4 to 1 meter thick which represent approximately a third -
of our coal depoaits. Therefore, the required mining volume can be ful-
filled only by introducing advanced deep coal mining techniques and -
technologies and by meeting the planned labor productivity increase.
Spurred by the international acientific-technical cooperation of CEMA
_ countries, innovation of inechanized mining began as early as the end of
the sixtiea by the introduction of the more efficient types of Soviet
KS 1 KG mining combines and of inechanical supports, primarily of the
shield syatem. In the beginning of the seventies CEMA member states
adopted a uniform scientific-technical policy in introducing advanced
mining techniques for deep coal minin~ which took into account special
characterietica of each country. The addition of this technical policy
was due primarily to the development of inechanized support systems -
permitting the concentration of mining in one stope.
The Main Chain Link
The Czech coal mining engineering industry, represented by the concern
- enterprise Ostro~ Opava, also contributed imporcantly to the develop-
ment of the mining systeme primarily with the successful. types of DVP 6 -
and DVP 7 mechanized mobila eupports of the second generation, the TH 500
and TH 600 acraper conveyora~ KSV 6 and KSV 101 mining combines for nar-
row seame and belt conve}rors of the TP 400 C and TP 630 A series.
Since 1967, when large-scale production of individual SHZ-type hydraulic
propa began at Ostro~ (annual volume about 50,00~ pieces) and mobile
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~upports beg~n to be introduced, a quali,taeively new stage of inechanized -
deep coal mining was reached. In the beginning of the SixL�h '~ive-Yenr ~
Plan the volume of. mining �rom faces worked with mobile supporta c~lre~dy
nmounted Co half Che overgll volume with daily quantities of mined coal
amounting to 482 Cons from one stope and to 10.6 tons of coal per shift. =
- The resC of the f~ce was then equipped with indiv{dual hydraulic propa, _
predominantly of domestic production. These stopes yielded more thnn a
third of the coal mined with an ouCput of 7.3 ton~ per shift and an
average daily output of 372 tons per etope. Mobile supporta reduced the
amount of labor required, improved the efficiency of mining and coal
transport equipment and in addition m~xrkedly imnroved the safeCy and hy-
gienic c.onditione in the mines.
~
Mobile supporCe became Che principnl link in the process of comprehensive
mechanization of mine ehafts; their introduction was rather complicated.
In the beginning of the sixtiea the first generation DVP 14 and DVP 2
test support seriea, deai~ned for medium thick seams, were produced in
our country, five DVP 3 mining aupport syatema for narrow aeams and DVP 5 _
- supporte deeigned for the exacting conditions of mining mighty coal seams.
_ Compared to importe of mobile eupports from the USSR, Che FRG and Austria,
- the Czechoslovak firat generation eupports were not widely used, due pri- -
marily to poor production preparation for this qualitative advance in
~ mechanizing work in coal mining shafts. However, the high costs of im- -
ports in foreign currency (the cost of a syetem per stope was at least
Kcs 50 million) induced usera and producers to change radically not only
the development but mainly the production of mobile supports.
Second and Third Generation Mobile Supports
In the beginning of the seventies the management of the Ostroj enterprise
creaCed conditions for the production of mobile supports of the second
generation; new advanced technological production procedures were intro-
duced such as dynamic rollex and ball burnishings, electrovibration weld-
ing ot stainless materials and bronzes, welding with preheating in a pro-
tective atmoaphere, etc. At the same time production was solidly based
on the use of etandardized hydraulic elements, specifically of switches,
safety valvea and spigota, and the basic sizea of hydraulic props and
cylindera were chosen eo as to permit using standard pipe semiproducts
and seals for the widest poseible production asaortmen~t. No les~ impor-
tant wae also the inCroduction of new intensive teating metbods of mobile
supporta directly under production conditions.
At the present time 35 stopes in our deep mines are equipped with DVP 6
and DVP 7:::~pports which, among all types of supports used in deep mines ~
in all C~tA countries, were highly rated. They proved advantageous in -
operation primarily because of their height, adequate working space for -
manipulation, long useful life, high reliability in operation and the
requirement of only half the nurnber of shifts for transportation and
installation compared to other support types.
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51nce 1976, developmental work ~,n the field of mobile supports focuaed =
muinly on saddle seam sCopes of variable Chickneas, irregular bedding and
heavy ceilings. To test mining technology, a mobile prop asaembly had
: Co be imported in the firat etage. Simultaneously, intiensive development
of domestic mobile prop types ie being puraued, eapecially of type DVP $ A
which can atill be clasaified as a second generation prop, together with
~ the development of the third generation DVP 9 mobile support for mining
seams up to 4.5 meters Chick.
OCher third generaCion supports are type DVP 10 for mining medium thick
_ flat ~eama and ty~e DVP 11 for narrow flat seams. These supporCs wi11
' already uae improved hydraulic cycle elamenCa which will simplify and
accelerate their control. But Cheir main advantage wi11 be their versa-
tility for use in ~topes with both a sCowing area and a aqueeze and for
working aear~g from 0.6 to 5 metere thick. The support types under develop- -
_ ment will be tested from 1979 till 1982 in compliance with the state plan
_ for technical development.
A StarCing Point of Cooperation
However, the compxehensive mechanization of mining L�hin seams still
- causes aerious problems. As in the case of saddle seams, one mining
assembly wae imported in 1977 to teat the new technology. BuC the pro- -
spective requiremeni: of supports will be covered by the DVP 11 type with
the 3 MKS mobile aupport which is being developed by Czechoslovak-Soviet -
cooperation as part of the KTSC plow syotem. This syatem was tested in
the Yubileynaya mine in a seam of average thickness of 0.78 meters where
in 1977 the average daily output was 1,019 tons. Further tests will be _
carried out at the Staric Mir~e in the OKR. Individu:~i SHT 70/30 hydraulic
bitelescopic props developed at Ostro~ will have to bc: used until the
start of large-scale production of the above assemblies. In a stope of
the Ostrava mine equi~ped with these props, the collective of Hero of -
Socialist Work Lumir Sakmar achieved a record output in mining a 51-cm-
thick, 125-meter-long aeam of coal. In 31 work days, 11,328 tons of
coal were mined with an average output of 6.5 tons per shift [as pub-
lished].
The problem of comprehensive mechanization of inedium thick flat seams
was prgctically solved by the introduction of domestic mobile supports,
stope conveyors, combines and stowing machines produced at Ostro3 or by
the innovation of this equipment which is in preparation in that enter-
prise. The partial ahortfall of efficient domestic combines will be
covered by importa from the Soviet Union (types KS1KG; K52; 1GS68) and
from the Polish People's Republic (types KWB3RDU and RDS).
Hitherto unreaolved remaina the conversion to 1000 V in the stope re-
quired by the higher electromotor otitput of the mining equipment. The ~
currently uaed 500 V limita the installed electromotor output to 100 to
120 kW. By using voltage of 1.000 V this limit increases to 250 to 300
kW. The problem is also being tackled at Ostro~ in cooperation with
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- Polish manufacturera and CzechosLovak producers of elecCrical equipment.
I3elt conveyor production is also expeceed to be modernized. OuCmoded
types of belt convPyors are expected to be replaced by new ones which
have a long useful life, are more reliaUle, and have a 2 x 30 or 2 x 55
' kW electromotor ouCput. A new aeriea 4~ith belt widths of 800, 1,000 and .
1,200 millimeters and 2 x 75 or 3 x 75 kW electromotor ouCput is under
developmenC.
The above trenda in the inCroducCion of advanced mining machinery, to-
gether with other organizaCional measures increasing worker iniCiative
exhibited by the movement of socialisr work brigades and l~rigades of
comprehensive rationalization, will help meet the more exacting demands
in supplying the national economy with coal in compliance with the tasks _
assigned by the 15Ch CPCZ Congress.
COPYRIGHT: 1979 - VYDAVATELSTVI A NAKLADATELSTVI ROH PItACE _
8664
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roR orrzcznL us~ ornY
CZECHOSLOVAK7A
J
MFCHANIZ~D PLANT TRANSPORT, INDUSTftIAL ROBOTS DISCUSSED
Prague T~CHNICKY TYDENNIK in Czech 20 Feb 79 p 6
- [Article by Fng Ivo Bernard, Reaearch InstiruCe of Machine-Building
Technology and Econanics, Prague: "Aur.omaCing Handling BeCween
- Operatinn~"] ,
[TextJ Not long ago, primary atCenCion in machine building was directed
toward ehe production processea themselves. It was only in large-
- series and masa production that traneportation between operations was
arranged. In one-off, emall-seriea and medium-seriea production,
which accounC for Che bulk of machine building, it was manual handling
- between operationa, wiCh only the most minor mechanization equipment,
which prevailed and for the moat part atill prevails, not only here but
abroad.
~
_ In many cases, the autanation of individual workplacea has now been
rather succesafully implemented. The current concern ia design and
implementation of higher fonna, particularly the organization of
= integratrd structures which will lead to the creation of whole integrated
- transporC and handling aystema. Thase efforCs have led Co the
development of many systema, most important among which are:
--combined supply and transport aystems; and
--industrial robots.
These two types of systems are quite diatinct in design, applicaCion and
oper~zCing principles. A common feature is their use of computers to
_ control work cycles, with considerable flexibility and rapid adaptability
of equipmenC for a rather broad range of elements in one or several types
of industrial groups.
Combined Supply and Transportation Systems
These have many vurianta in pracCice. Their basic features are:
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--the supply aystem makea available a predetermined supply of prepared
workpieces and producta for further procesaing (machining, asaembly
and eo on);
--the traneporC syatem providea connection between the producCion sys~em,
Che aupply aection and a higher-1eve1 transport syatem (intrafaciliCy
Cransport and the like);
--an intetconnecting syaCem makes posa9hle inrerchange of workpieces
berween the tran~port and aupply systems and between the supply
depArtment and individuAl workplacea;
--organization of individual workplaces within the scope of a transporC
system;
--traneportaCion and aCordge of workpieces in units of one or,
exceptionally, two interrelaCed aizea or independently by Che use of
epecial or universal hangers, by a auitable tranaporC line and eo on;
--transportation of equipment (in some cases) Co production sections
by Che supply and tranaport syatems.
- Tl~e mosr widely-used handling aysCems are described bdlow:
Inductively-controlled electric carts (primarily in intrafacility
transporti) are also useful in intProperation trana~ort, bot~ for
' delivery of wor~pieces between individual workplaces and in particular
in the asaembly process. The carts are driven by a cable laid in the
floor, and their movemenCa are controlled by frequency signals emitted
_ by the drive cable according to programmed control insCructions. The
length of the circuit is practically unlimited. The carts may be diverted
at switches and can move both forward and backward. They can be seopped
at a apecified point wiCh an accuracy of about +5 cm. An advantage -
_ of thia syatem is thttt there ie no interference with handling by other
tranaport facilitiea. Good use can be made of the work rhythm, and
work :isaigrunente can be divided up and regrouped as needed (so-called
"service on demand") regardlesa of whether it is group-type work or
- process line work.
Suspended Cracks, with conventional or electronic control, can generally
_ be assembled in various configurations using building-block components,
with the posaibility of branching them and when necessary of changing the
number of vehicles and varying Che carrying capacity within wide limits
for an extensive variety of producta.
- Another syatem is that of gravity (descending) tranBport lines using
either roller linea along which the workpieces move to individual work-
placea by their own weight, or as rails along which special dollies with
guide rollera move by pravity (UNIROLL system).
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ron or~xcrnL us~ orn,1~
AnoCher imporl~~nC supply and Crnnsport system For small-series
praduction, especially af box-ahaped or flat parCs, is a Ciered stock
bin with u atower. These ure designed as one-, Cwo- or Chree-Ciered
strucCures aerved by one or two stowers moving on wheels, or by a
strEiddling arower rotl9.ng on u Crack on Che middle range of the stock
bin.
T}?ese sytems and many others have tl~eir individual merits and shorticomings
which inFluence Cheir u~e (size of series, type, dimensions and
weigtit of worlcpiecea, nature of production process and go on). In any
case, however, they meeC the needs of interoperation supply of workpieces
and delivery Co individual workplaces and between inditridual operations.
Computer equipment is generally used to control them:
Tndus~rial RoUots
Industrial robotis are npplicable in industriAl automation and to a
cerrain extenC in interoperaCion handling in small-series discreCe
production. Even though pracCicnl experience has led to a certain
cooling oF the iniCi~1 enthuaiasm for their use, their development and -
further Applic~tion :.s conCinuing, and robots will unquestionnbly
.be ~n indiapenaible meana of automating handling both between and
during operations.
ror economic reasons, they show their advantages in workplaces with
conditiona unfavorable to health, where they perform physically demanding
, Casks, and where labor productiviCy can be radical.ly increased by their
use. In most cases they operate more slowly than humans, but Chey -
are nonetheless efficient.
A wide variety of industrial robots with a broad range of carrying
capacities (from several decagrams to several hundred kilograms) is
being developed, especially in Japan, the United States, England,
- Sweden and West Germany. The development and improvement of industrial
robots is also acceleraCing in socialiet countries. Their developmenC -
is particularly advanced in the Soviet Union, and good results have been
attained in Bulgaria and Poland. Most advanced in this country is the
development of the QJN 020 robot (by the Research Institute of Machine
_ Building Technology and Econanics and the Research Institute of Forming
htachinery). The first models in an experimental series are destined
for g~ar-box gear production lines. An experLmental series of the PR lOP
robot (developed by the Research Institute of the Metalworking
Industry, Presov) and a prototype of the PR 04P robot (developed by the
' Research Institute of Machine-Building Technology and Economics, Prague)
_ are in production.
The unprecedented development of electronics, computers, control systems
- and numerically-controlled machine tools is creating the conditions
for autcxnation of interoperation transport and handling. Different
varianta of systema with entirely new types of equipment do not compete
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with but rarher c anplemenC each orher. Tn many cases, comprehensive
_ nuComation of a producCion section can be realized by iCs sysCematic
interconnection. Pracise delimitation of act~.viCies and ot� coordinaCion
between units has noC yet been compleCely solved, and anawering th3.s _
quesCion ia a current task of research and production.
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