MODEL No. LC-1002 LIEBHERR 6-AXIS "CNC" |
GEAR HOBBING MACHINE, Serial No. 1104/5 (New 1989) |
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TO VIEW VIDEO: |
Click Here To Watch Video 1 |
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Suitable for hobbing spur and helical gears, |
splines, pinions, worm wheels, & other work-pieces |
of similar profiles up to 39.4" (1000mm) pitch diameter |
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EQUIPMENT / FEATURES: |
Machine bed with stationary table assembly, table |
spindle with anti friction roller bearings |
Single start indexing gear, worm wheel of bronze, |
dual lead worm |
Machine main column with infinitely variable radial |
feed, automatically locked in working position |
Machine with "extended height main column" for |
increased |
Axial travel of 39.4" (1000mm) |
Tailstock column with hydraulically actuated tailstock |
arm, with "clam-shell" pinion work-steady, |
automatically locked in working position |
Hob head for radial, axial, and tangential hobbing. |
Hob slide automatically clamped during axial and |
radial hobbing. Equipped with automatic incremental |
hob shifting, preselectable in both directions |
Separate drives for hob spindle & work table w/hob |
head mounted dc main motor |
Ball screws, pre loaded re-circulating for axial, |
radial, & tangential feed |
Automatic clamping /unclamping of hob arbor, |
controlled from operator's panel |
Liebherr cnc control system "mpst" in 6-axis |
execution with operator |
Conversational software for gear hobbing and crt for |
the following axes: |
radial movement --- axial movement |
tangential movement --- hob rotation |
table rotation --- hob head swivel |
( CNC-CONTROL FEATURE ) |
The electronic synchronization of the generation |
process,(i.e. Hob and table rotation), is |
integrated in the cnc system. |
Helix generation, i.e. Linking of axial hob slide |
movement and table rotation, as well as tangential |
hobbing, i.e.linking of tangential movement and |
table rotation are integrated in the cnc system. |
Copy system for crowning and end relief are part |
of the cnc system, i.e. Linkage of radial and |
axial motion. Linear and circular interpolation, |
max. Radius 328 ft. (100 m). |
Feeds programmable in mm or inches/table revolution, |
feeds constant with changes in hob speed. When |
single indexing milling, feed in mm or inch/min. |
Separate overrides for feed and speed (infinite |
between 10 and 133%). Altering of feed and speeds |
during hobbing allows optimization of the cutting |
condition. |
Cnc system, free programmable for individual cycles, |
input via keyboard or punch tape. |
Parametric programming with 90 variable and 10 |
fixed parameters |
Parametric programs for 32 fixed cycles repeatedly |
used for hobbing, e.g., one cut cycle, two cut |
cycle with or without radial approach, climb |
or conventional hobbing with or without shifting, |
radial or tangential hobbing, fixed cycles for |
crowning and taper hobbing, (programs include |
digressive approach) |
Software for calculation of approach, overrun |
and crowning data (crowning radius and radius |
location). |
Cmos technique for approx. 100 part programs |
(components), depending on complexity of program |
(32,000 characters). |
Data i/o via rs 232 connector from or to a peripheral |
device, such as tape reader or puncher, magnetic |
cassette device or data terminal. |
Logic capability with feasibility checks i. E. Max. |
And min. Machine parameters are automatically |
scanned when new programs are made. All information |
displayed on c.r.t. screen. (display is 8 lines x |
32 characters per line). Input of all information |
via keyboard. |
Keyboard input for the following parameters: |
no. Of teeth --- (smallest programmable increment) |
no. Of hob starts |
helix angle .0001 degr. 0.0001 degr. |
axial travel .00004" 0.001 mm |
radial travel .00004" 0.001 mm |
tangential travel .00004" 0.001 mm |
hob shift travel and .00004" 0.001 mm |
step size |
axial feed .004"/rev 0.1 mm/rev |
radial feed .0004"/rev 0.01 mm/rev |
tangential feed .0004"/rev 0.01 mm/rev |
hob rpm 1 1 |
hob head swivel angle .05 degr 0.05 degr. |
Electronic handwheel for manual control of the |
machine (any linear axis and table rotation), |
Miscellaneous functions (m functions) coolant on/off, |
Workpiece clamping/ unclamping, overhead work support |
up/down | |
Controlled emergency shut down. In case of |
disturbance, i.e. Failure of single measuring |
systems, or in case of disturbances within |
the hydraulic area, the electronic |
synchronization of the generating process |
is maintained until rotary motions have |
ceased. |
Diagnostic capability with faults displayed on the |
c.r.t. faults are monitored on: |
p. C. Controller |
a. C. Servo motors |
rotational relationship |
emergency stop, etc. |
( ADDITIONAL MACHINE EQUIPMENT ) |
Hydraulic equipment installed on the machine, |
including clamping system for machine column |
and tailstock arm |
Automatic pressurized circulating lubrication |
for all guide-ways |
Coolant unit with pump chemaperm chip conveyor |
with magnetic chip transfer and permanent |
magnetic separator arranged alongside the machine |
Sliding door splash guards and exhaust hood over |
work area for connection to a central oil mist |
collecting system. Hood retractable for |
loading/unloading, w/safely interlock on splash |
guard door |
One (1) hob arbor hardened and ground |
One (1) work area lamp |
Complete electrical control equipment for main voltage |
(currently arranged for 470 volt, 60 hz operation) |
Operator's panel with crt. Pc integrated into cnc. |
Power controls siemens allis |
Hydraulically adjustable backlash control of the |
work table drive, preferably for |
Skive hobbing, and for using l.h. hobs for r.h. |
gears, and vice versa |
Machine leveling shoes |
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PRINCIPAL SPECIFICATIONS: |
Maximum work-piece diameter | 39.4" (1000mm) |
Maximum hob diameter | 9.44" (240mm) |
Maximum length of hob | 11.8" (300mm) |
Hob Speeds, selective | 25 to 250 rpm |
Hob arbor taper type | ISO 50 |
Maximum diametral pitch (module) |
based on 86000 lbs. steel | 1.5 DP (16 module) |
Maximum hob shift (tangential travel) | 9.84" (250mm) |
Maximum hob-head swivel angle | +/- 50 degrees |
Hob drive | 41.3 HP (30.8 kW) |
Maximum axial travel | 39.4" (1000mm) |
Work-table diameter | 27.95" (710mm) |
Minimum No. of teeth cut | 6 |
Maximum distance centerline of hob-arbor |
to work-table centerline | 24.6" (625mm) |
Minimum distance centerline of hob-arbor |
to work-table centerline | 1.58" (40mm) |
Maximum distance, centerline of hob-arbor |
to work-table surface | 48.8" (1240mm) |
Minimum distance, centerline of hob-arbor |
to work-table surface | 9.44" (240mm) |
Work-table bore diameter | 8.858" (225mm) |
Work-table bore depth | 15.7" (400mm) |
Feed, Axial - per/table rev. | .004" - 0.787" |
Feed, Axial - per/table rev. | (.010 - 20mm) | |
Feed, Radial - per/table rev. | .004" - 0.157" |
Feed, Radial - per/table rev. | (.010 - 4mm) |
Feed, Tangential - per/table rev. | .0004" - 0.196" |
Feed, Tangential - per/table rev. | (.01 - 5mm) |
Rapid Speed, Axial - per/min. | 80" (2000mm) |
Rapid Speed, Radial - per/min | 120" (3000mm) |
Rapid Speed, Tangential - per/min. | 40" (1000mm) |
Approximate net weight | 35,200 Lbs(16,000 kG) |
Total connected power approx. | 74 kVA |
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PRICE: For the machine & accessory & accessory |
equipment prepared for safe truck transport under |
supervision of qualified service engineer, with |
delivery F.O.B. truck Cincinnati, OH | $50,000.00 |