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GEAR HOBBING MACHINERY (HOBBERS), CNC

Liebherr #LC1002, 6-Axis, 39.4" max diameter, 9.44" hob diameter, 11.8" hob length, '89, #27153

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General Specifications


Manufacturer: Liebherr
Model: LC1002
Stock #: 27153
Price: Request a Price

Dealer Information


Mohawk Machinery Inc
10601 Glendale Rd
Cincinnati, OH 45215-6330

Contact: Mr.Secord
Tel: 513-771-1952
Fax: 513-771-5120
Email: secord@mohawkmachinery.com
  
Gold Level Dealer Since 1956
Website: web.mohawkmachinery.com

View our Equipment Listings

Detailed Product Description


MODEL No. LC-1002 LIEBHERR 6-AXIS "CNC"
GEAR HOBBING MACHINE, Serial No. 1104/5 (New 1989)

Suitable for hobbing spur and helical gears,
splines, pinions, worm wheels, & other work-pieces
of similar profiles up to 39.4" (1000mm) pitch
diameter

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

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