JPRS ID: 10495 USSR REPORT CONSTRUCTION AND EQUIPMENT

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• Document Creation Date: November 1, 2016
• Sequence Number: 8
• Content Type: REPORTS

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JPRS L/ 10495 ~
6 May 1982
USSR Re ort
p
CONST?i.~::TION AND EQUIPMENT
(FOUO 3/82)
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JPRS L/10495
6 May 1982
USSR REPORT
CONTRUCTION AND EQUIPMENT
(~'QUO 3/82 ) ~
CONTEf~TS
MFTALWORKING EQUIPMENT
Report on Fxposition "Podshipn iki-81" [BALLBEARINGS-81]
_ (V. I. Antip~v, V. ,A. Potapov; STANKI I INSTRUMENT,
Oct 81) 1
~
- a - [III - USSR - 36a FOUO]
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MET.4:~WORKING EQUIPMENT
UDC [061.4:621.822J"1981"
REPORT ON EXPOSITION "PODSHIPNIKI-81" [BALLBEARINGS-81]
- Moscow STANKI I INSTRUMENT in Russian No 10, Oct 81 (signed to press 12 Oct 81) Fi.
33-37
[Article by V. I. Antipov and V. A. Potapo~: "'Ballbearings-81' Exhibit"]
[Test] The international "Ballbearings-81" exposition, in which more than 100 com-
panies from 15 countries took part, was held from 25 Ma.rch through 8 April 1981 at
the Sokol'niki Exhibition Complex in Moscow. The exhibit occupied over 7,000 m2.
~ Here, we offer descriptions of the designs and specifications of several exhibits by
foreign companies.
Spindle assembly ballbearings were shown by Gamet, Nadella and Timken France (France)
and FAG (F~G). A ma~ority were precision bearings, which high manufacturing preci-
sion and high-quality connecting surfaces, resultiag in a high upper limit and ex-
tended range of spindle rotation speeds for spindles mounted on these bearings.
Gamet offere3 single- and double-roller bearings with full rollers for lubricants.
The following types are produced: single-row (type C) with or without bearing col-
lar (25-506 mm fit openings, rotation speeds of 10,200 to 760 rpm); single-row (type
P) with a wide outer race and lubricant holes, as weil as holes along the outer race
f ace for installing springs (25 - 177.8 mm f3t openings, rotation speeds of 10,200 to
1,800 rpm); single-row (type Hydro P) with a w3.de outer race with lubricant holes and
holes around the face for installing springs using an addii~ional pretightened race
whose tension is regulated by outside pressure; fit opening diameter and rotation
speeds are as in the type P bearings; double-row (type G) with a flush outer race
and lubricant o~enings (25 - 5G6 mm fit openings, rotation ~peeds of 10,200 to 760
rpm); double-row with a wide outer race with collar, fit openings and rotation speeds
as for type G bearings; double-row (type HVE) for. use in high-speed spindle assembl-
ies (35 - 210 mm fit openings and rotation speeds of 9,500 to 2,100 rpm).
Gamet also demonstrated a lathe spindle with chuck. The spindl2 design uses special
ballbearings through which the chuck drive pressure fluid moves. This permits elimi-
nating the hydraulic cylinder usually located on the spindle's rear race, inasmuch as
it is designed as part of the chuck. It is the company's opinion that this permits
decreasing che spindle's moment of inertia and freeing the rear race for the addition
of other mechanisms or devices (if necessary).
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One merit of this spindle design is the use of a double-row roller bearing, with the
races located a considerable distance from each ~ther, signif~.cantly increasing the
unit's rigidity. The pressure fluid is fed through a baffle race claniped ~etween
the inner bearing races and precisely centered on the spindle at a point where the
spindle strain under external load is minimal. A small gap is anticipated between
the outer bearing race and the baffle race.
The precision parameters of the Gamet ballbearings used in the spindle units are de-
scribed by the following data: clearance along inner fit diameter (d) and outer dia-
meter +0.005 mm (for d180 mm); radial play for inner
and outer race rotation 0.0015 and 0.003 mm, respectively (d180 mm); znd play of both the inner and
outer races 0.003 mm(for d180 mm).
Nadella demonstrated a wide range of needle bearings for various machin.e tools, in-
cluding._o~es for drilling and boring machine gear boxes controlling wobble in vari-
ous types of machine tools and spindles in lathes, boring and grinding machines, and
other machine tools. '
Figure 1 shows a boring machine spindle mounted on precision needle bearings (with
retainer and control ~learanc~) of the Na204Delta (forward race) and Na2035Delta
(rear race) types . The outer bearing race strain is compensated for by plate-type
springs adjusted to a certain tension. The uni~ also uses two needle thrust bearings
of the AXJ7 4062 type, b etween which a baffle race is installed. This spindle design
ensures a rotation of up to 8,000 rpm. [Caption to Figure 1, not reproduced for this
report: Boring machine spindle mounted on Nadella (France) needle bearings.~
~'igure 2 shows the forward bearing assembly of a milling head using a Na2025 Delta
precision needle bearing with no outer race, but with retainer and control clearance;
an HRC 60 tempered spindle journal serves as the race. The bearing is preloaded by
~ a screw to a special-shaped spring resting on the expansion race 1ugs. Maximum spin-
dle rotation speed is 1,400 rpm. [Caption to Figure 2, not reproduced for this re-
port: Forward bearing assembly of a milling head with Nadella (France) bearings.]
The Timken France exhib it offered materials showing examples of the use of company
bearings in machine tool spindle assemblies. A majority of the spindle assemblies
(using this company's bearings) are of the double-seat type. For example, in the
spindles of the NID 5 NPC [numerical preset control] lathe (Gildemeister, FRG), the
1~eynumat 2(Heyligenstaedt, FRG), the Producenfi S1 (Bohle, FRG) and BZ30 (Steinel,
FRG) multiple-operation machines, the UF21 multipurpose milling machine (SHW, FP.G)
and the 200-8 eight-spindle chuck automatic machine (Wickman, Britain).
The company recommends that Hydra-Rib bearings with a sliding race permitting adjust-
ment of bearing clearance during operation be used in spindle assemblies with nigh
rotation speeds. Spindle units with such races have opfiimum dynamic specifications.
Figure 3 shows a~Producent S1 spindle mounted on Hydra-Rib bearings (100 mm fit open-
ing, rotation speed of 11,200 to 4,5~n rY;;, ".~:.~ferable power of 11 kW) . [Caption
to Figure 3, not reproduced for this report: Bohle (FRG) Producent S1 mu~.tiple-
operati.on machine tool spindle on Timken France (France) Hydra-Rib bearings.]
The FAG exhibit was one of the most representative. It demonstrated bearings, grin-
der spindle units, apparatus for monitoring parts quality (including bearing races)
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and so on. This company's bearings are used in various types of machine tools, as
for example, spindle assemblies and swivel tables of heavy-duty NPC boring and turn-
ing lathes (the Innocenti Company, Itals) with ~7000 mm faceplates. Moreover, FAG
bearings are used in machine tools made by Pittler, Traub, Htiller-Hille and Kieser-
ling (FRG) and Saimp Utita and Canavese (Italy).
Figure 4 shows a Heysomat 20 (the Heyligenstaedt Company) duplicating lathe spindle
using a series FAG NNU 4924 SK MSP roller bearing on the front race and two series
FAG 751124 MA.SP thrust ~earings (angle contace) and a series FAG NN 3019'K.S.P. rol-
ler bearing on the r_ear race. Maxitnum spindle rotation is 2,800 rpm and transferable
power is 45 kW. [Caption to Figure 4, not reproduced for this report: Heysomat 20
duplicating lathe spindle (Heyligenstaedt Company, FRG) with FAG bearings (FRG).]
Nine foreign companies dernonstrated equipment (21 units) for abrasion-ma~hining
rocker bearing parts. Inasmuch as the machines are intended basically for mass pro-
duction, they are not equipped with NPC installations.
The largest number of grinders was presented at the GDR display. Among them, we
should note the SW~AGL50 automatic cylinder-and-cone grinder (Figure 5), which is
intended for grinding inner bearing races to ~13-63 mm. This machine, which is
built into an MLRWR63 automatic line, does the final machining of a raceway set on
stationary supports. Maximum circumferential speed of the grinding wheel installed
on the FAG radj.al thrust bearings is 100 m/sec. The cuttir~g feed is done by a moving
grinding headstock equipped with flat and V-shaped race guides. A static frequency
transformer is used to regulate the grinding wheel rotation speed. Precision is:
tolerance 0.008 mm; out-of-round, faceting and ripFling 0.0015 man; roughness
of machined surface Ra=0.4 um. [Caption to Figure 5, not reprodtice3 for this re-
port: SW~AGL50 automatic cylinder-and-cone grin~er (GDR).J
The centerless automatic cylinder-and-cone grinder based on the SASL 125 (GDR) in the
traditional configuration (with a movable drive wheel headstock) is intended for mach-
ing barrle-t~pe shaping rollers and is equipped with a loading-unloading installation.
- Ztao rollers in-feed grind profile circles simultaneously. The circles are guided by
a contour follower using single-point diamend tools. The roller monitoring measure-
ments are made outside the machine tool working zone. The control installafiion makes
adjustmen~s based on measurement results.
= Enterprises of the GDR and Czechoslovak SSR and Japan's Seiko-S~iki Cpmpany demon-
strated internal grinders for machining bearing races. Gamf~or (Italy) demonstrated
several high-speed race-mounted spindles and one spindle on hydrostatic mounts.
Specialists took an interest in an experimental Czech BDL 50A NP~ equipped and inten-
ded for grinding l~oles 10-SO mm wide an.d up to 40 mm long in bearing races. The
transverse feed drive and table pitch are ~hanged by hydraulic cylinders controlled
by servo valves. Inductive pick-ups provide feedback on table pitch and grinding
heatstock position.
Switches on a broad connected to the control cabinet set cutting speed, feed and
machining allowance, oscillation frequency and amplitude, amount of compensation,
number of cycl~s between wheel ad3ustments or ad3ustment orders within a cycle, as
well as operation by cycle, with an active monitoring device or with on-track moni-
toring. Diameter precision is 6 um, taper precision 1.5 um, out-of-rouncL_~t
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more than 2 um and roughness Ra=0.32 um. Electric grinding spindles are set in
morion by static frequency transformers which ensure a spindle rotation speed (step- .
less regulation) of 20,000 to 87,000 rpm.
In the Sig-O-MB automatic internal grinder (Figure 6) offered by Seiko-Seiki (Japan),
- the item is set in a rigid chock and roller; the unit is for making bearing race fit
openings (external diameter 1.5 - 16 mm, internal diameter 1-9 mm). It is turned
by a drive roller, and a hydraulic cylinder clamps the piece to the end race. This
eliminates knurling on the parts. The transverse and axial adjustment tables and
sealed hydrostatic guides are independent units insta~.led on a welded base. The mach-
ing can be ordered with an adaptive control system (stabiiizing piece pre~ision by
- maintaining a constant removal speed when L-aking off the final allowance), as well
as a machined-piece monitoring system. The high-frequency grinding spindle drive
- (also manufactured by the company) is 0.35 k4:, wheel rotation spe~d is 100,000 to
150,000 rpm and wa~ranteed service life is 1,000 hours. [Caption to Figure 6, not
reproduced for this report: Seiko-Seiki (Japan) SIG-0 MB automatic internal grinder.]
The unitized machine tools offered by CZM (Strakonice, C2echoslovak SSR) for (in-feed)
grinding internal ballbearing races cames either automatic (model BEL214) or semi-
automatic and automatic (model BEL 217). The grinding headstock and piece headstock
are installed on the machine's stand. The piece headstock has magnetic clamping and
feed devices and two sliding supports for the piece being fed in. All working move-
ments in the cycle are done by the grinding headstock. TY~e wheel is adjusted auto-
matically at a prescribed adjustment ineerval determined by the r.umber of raceways
being machined: 1-63 (model BEL 214) or 1-31 (model BEL 217).
The cycle is controlled pneumatically and the control impulses are electrical. The
machine can be ordered with an active monitoring device. The diameter of the race
being ground (at speeds of up to SS m/sec) is 5-30 mm (model BEL 214) or 55-225 mm
(model BEL 217). Piece dimensional precision is �0.01 mm, surface roughness is Ra=
=0.024 um and rippling is less than 0.8 um.
Superfinishing and finishing machines were offered by Grieshaber, Supfina, Thielen-
haus and Peter Wolters (FRG) and ZVL (Pova'lska Bystrica, Czechoslovak SSR). The
SM450 automatic centerless superfinishing machine equipped wi~h bunder feed (Figure
7) offered by Supfina (with several. superfinishing heads) is intended �or machining
0.8- to 10-mm nee3le bearings in one pass. Each head has rail clamping fcrce adjust-
ment independent of the piece being machined. Needle speed across the rollers is
2 m/min. Machined surface roughness is Ra=0.02:0.03 um, out-of-rou:nd is less than
0.1 ~im and noncylindriciCy is less than 1 um. [Caption to Figure i, not reproduced
for this report: SM450 superfirishing machine, Supfina Company (FRG).]
The SFM 7702 automatic superfinisher made by Grieshaber is intended for superfini:sh-
ing the bearing races, shafts and bushings (~10-40 mm, length 20-170 mm) of water
pumps. It has four working positions, in which two races can be worked simultane-
ously on one shaft, Shaft productivity for ~15 mm is five pieces per minute, sur-
face roughness is Ra=0.06 um. ar.d race out-of-round is less than 0.5 um.
The automatic superfinishing machines produced by the Czech~slovak SSR are intended
for machining outer and imner radial single-row bearing races with outside diameters
of 6-16 mm (model DSLT 1/16) and 16-35 mm (model DSLT 2/35). The DSLT 1/16 is a
single-spindle machine and xhe DSLT 2/35 is a double-spindle. Races on sliding
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supports are secured using electromagnets and adjustments are made hydraulically.
On these machines, surface quality is improved 80-90 percent and rippling and out-
of-round decrease 65-75 and up to 50 percent, respectively.
Peter Wolters Cc*mpany demonstrated double-disk verticZl finishing machines. On the
AL1H, with active monitoring and set up to work the faces of bearing races up tio 200
mm in diameter and 80 mm high, the operating cycle can be set from a control panel.
The finishing disks, the upper one of which is hydraulically clamped, are 690 mm in
diameter.
~ The AL00-].Z (Peter Wolters Company), which is equipped with 445-mm wide finishing
disks, is intended for machining needle and cylindrical rollers up to 35 mm wide and
100 mm long. The blank is first precision-ground. The AL-00 (same company) is in-
tended for plane-parallel machining (between 310-mm finishing disks) the faces of
bearing races 1-80 mm in diameter. The faces are set in retatners and make a plane-
tary motion produced by a lantern reduction gear. The disk rotation speed is con-
tinuously variable. The machine is equipped with active monitoring.
The automatic MLRWR 63 line ~GDR) is intended for abrading the inner races of ball-
bearings with races 25-63 mm in diameter and 12-30 mm long. The line, consisting of
an automatic SW~?,GL50 cylinder-and-cone grinder (for external grinding of the race),
a S1W3B automatic internal grinder (for grinding the inner race opening) and a S7.W4
automatic superfinisher (for superfinishing the raceway), uses magazines with remov-
able bins, which increases its productivity.
Up to 6,000 races can be put into the removable bin, which is in the shape of a cube
with sides 1,000 mm long. Each bin consists of 24 flat casettes into which the races
- are placed. The transport installation includes hoists and a pan system in the form
of flexible belts. Transfer storage units with a capacity of 250-300 races each are
located between machines. The presence of parts in the transport system is monitored
by pneumatic sensors. The line's use coefficient is determined basically by the op-
~ eration of the internal grinder, whose efficiency is in turn dependent on the dura-
bility of the grinding wheel (approximately 100 races). The electrical equipment
element base of the line is very reliable. The electrical control circuits are con-
tactless sensors with a sigr~al voltage of 12 V.
Cutting and auxiliary tools were exhibited by Sandvik (Switzerland), which showed an
extensive line of cutting tools (various types of blades, cutting points, drills with
multifaceted rotating blades, milling cutters), as we11 as the Varilock auxiliary tool
set (Figure 8, not reproduced for this report. Caption: Varilock auxiliary tool set
(Sandvik Company, Switzerland): a) system 80; b) system 63; c) system 50).
The ~arilock set was conceived as a multipurpose system for fastening tools in the
spindles of multi,ple-operation machine tools and was structured on a base of mandrels
with ISO40 (system 50), ISO45 (sy~tem 63) and IS050 (system 80) couplings, reducers,
chucks, extensions and tool assemblies. The tools comprising the set are intended
for a broad range of operations, from rough milling to precision boring.
The system 80 and 63 reducers are interchangeable. The elements comprising the sys-
tem are con~ected by a central bolt (with a cutting-fluid opening), permitting use of
internal cutting-fluid supply toc,ls (the T-MAX, for example) and tools for machining
shal.low openings. When special tools are used, the set includes movable hone holders
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~ and semifinished blanks for manufacturing various tools (multiple-blade honing tools,
~ for example).
Measuring devices were demonstrated by Marposs (Italy), Rank Taylor Hobson (Britain},
~'AG (FRG) and Steyr (Austria), as well as by CEMA member-nations. The Marposs Com-
pany demonstrated a Minialsar active monitoring unit used in circular grinding of
smooth and noncontinuous shafts. The range of adjustment of the two-contact clamp
is 3-90 mm. The company also offered devices for step-monitoring shafts and openings.
The device consists of a Testar-type metering unit and manual internal gages, clamps
and races with inductive transformers. The company demonstrated a multipurpose mo-
dular measuring device for monitoring six parameters of variable-speed shafts.
One feature of the Rank Taylor Hobson Company's exhibits was the use of computer
equipment for processing measurement results, permitting automation of that process
and significantly increasing measurement precision. The computer ~quipment is used
in combination with a Talyrond 73-3R "kruglomer" ["roundness meter"] (enlargement
factor up to 200,000) and with a Talyserf 5T-120-3A for measuring surface roughness
and rippling. In addition to grc:ater measurement precision, this provides an oppor-
tunity for increasing the number of parameters being measured. The company also de-
monstrated a Talycontor macroprofilograph for monitoring the shape of circular parts,
and bearing races in particular. The dcvice has automatic vertical bit movement
drive with a stop (when necessary) in the ~iddle of the measurement range.
The FFA "roundness meter" made by Steyr is intended for monitoring bearing races
(outside diameter 26 - 160 mm, inside siameter 10 - 105 mm). The device can be built
into automatic complexes intended for machining bearing races.
COPYRIGHT: Izdatel'stvo "Mashinostroyeniye", "Stanki :i instrument", 1981
11052
CSO: 1821/028 END
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