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GEAR HOBBING MACHINERY (HOBBERS), CNC

Liebherr #LC-152, 7-Axis, 6" work, 5 DP, 10" hob slide trvl, 4.7" table clamp surface, #24848

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Liebherr #LC-152, 7-Axis, 6" work, 5 DP, 10" hob slide trvl, 4.7" table clamp surface, #24848
#LC-152 LIEBHERR 7-AXIS "CNC" GEAR HOBBER
New 1991, Serial No. 0104/12

FEATURES / EQUIPMENT:

Machine Bed w/Stationary Table Assembly, Table
Spindle w/Anti-Friction Roller Bearings
Pre-Loaded Re-Circulating Ball Screws For Axial,
Radial, & Tangential Feed/Motions
Machine Main Column w/Infinitely Variable Radial Feed
Power Swivel Hob-Head For Axial, Radial, & Tangential
Hobbing, Hob-Slide Automatically Clamped During
Work-Cycles, w/Incremental Hob-Shifting,
Pre-Selectable In Both Directions
Hob Head w/Mounted 13.1 HP, DC Main Motor For
Infinitely Variable Hob Speeds
"Quick-Change" Hob Change System, w/Automatic Clamping
& Unclamping Of Hob Arbor
& Outer Support Bearing, Controlled Via Push-Button
Tailstock Column w/Electrically Actuated Arm, (CNC
Control Of Tailstock Arm)
Hydraulic Clamping Device (Double Acting) w/Infinitely
Variable Clamping Pressure (Up To 8,800 Lbs.)
Mounted Below Machine Table For Actuating Work Piece
& Fixture Clamping
Two Position Ring Loader w/Two (2) Adjustable
Workpiece Pockets, Including Pallet Conveyor, W/
Approx. Thirty (30) Pallets, Including Elevating
Station To Interface w/Ring Loader
Work Table Positioning Device Providing Work-Table
Stop In Pre-Programmed Position Enabling Pre-
Identifying Gear Tooth Alignment Prior To Cutting
Teeth
LIEBHERR "MPST" Continuous Path "CNC" Controller w/CRT
For Seven (7) Axis Plus Ring Loader
- X Radial Movement      - B Hob Rotation
- Z Axial Movement      - V Tangential Movement
- C Table Rotation      - A Hob Head Swivel
- Z1 Tailstock Arm Positioning
The Electronic Synchronization Of The Generating
Process, (i.e. Hob & Table Rotation), Is Integrated
In The CNC-System
Helix Generation, (i.e. Linking Of The Axial Slide
Movement & Table Rotation, As Well As Tangential
Hobbing), (i.e. Linking Of Tangential Movement &
Table Rotation), Integrated In The CNC-System
Copy System For "Crowning" & End Relief Are Part Of
The CNC-System, (i.e. Linkage Of Radial & Axial
Motion) Linear & Circular Interpolation, Max. Radius
328 Ft. (100M)
Feeds Programmable In mm Or Inches/Table Revolution,
Feeds, Constant w/Changes In Hob Speed
Separate Overrides For Feeds & Speed (Infinite)Between
10% & 133%, Altering Of Feed & speeds During Hobbing
Allows Optimization Of Cutting Condition
CNC-System, Free Programmable For Individual Cycles,
Input Via Keyboard
Parametric Programming w/90-Variable & 10-Fixed
Parameters
Parametric Programs For 32 Different Fixed Cycles
Repeatedly Used For Hobbing: (One-Cut Cycle, Two-
Cut Cycle, w/Or w/o Radial Approach, Climb Or
Conventional Hobbing, w/Or w/o Shifting, Radial 0r
Tangential Hobbing, Fixed Cycles For Crowning Or
Taper Hobbing). Programs w/Degressive Approach
Software For Calculation Of Approach, Overrun, &
Crowning Data, (Crowning Radius & Radius Location)
Software For Single-Index Milling (Programmable In mm
Or Inches)
CMOS-Technique For Approx. 100 Part Programs
(Components), Depending On Complexity Of Programs
(32,000 Characters) w/Optional Expansion Of CMOS
Memory To 128K
Parallel Programming, (Ability To Program For
Different Work Pieces While Machine Is Running)
Data I/O Via RSR-232C Connector To Or From A
Peripheral Device (Tape Reader/Puncher, Magnetic
Cassette, Or Data Terminal). DNC Capable
Logic Capability w/Feasibility Checks, (i.e. Max./Min.
Machine Parameters Are Automatically Scanned When
New Programs Are Made). All Information Displayed
On CRT Screen (w/8-Lines & 32 Characters Per Line)
Input Via Keyboard
Keyboard Input For The Following Parameters:
(Smallest Increment)
- No. Of Teeth      3/3
- No. Of Hob Starts      1/1
- Helix Angle      .0001 DEGREE/.0001 DEGREE
- Axial Travel      .0001"/0.001mm
- Radial Travel      .0001"/0.001mm
- Tangential Travel      .0001"/0.001mm
- Hob Shift & Step Size      .0001"/0.001mm
- Axial, Radial & Tang Feed      .0001"/Rev./0.001mm/Rev.
- Hob RPM      1/1
- Hob Head Swivel      .015 DEG/.015 DEG
Electronic Hand-Wheel For Manual Control Of Any Linear
Axis Motion, Including Table Rotation
Miscellaneous (M-Functions), Coolant On/Off, Work
Piece Clamping/Unclamping, Overhead Work support
Up/Down
Diagnostic Capability w/Faults Displayed On The CRT,
While Monitored On PC-Controller, AC Sservo Motors,
Rotational Relationship, Emergency Stop
Controlled Emergency Shut Down (In Case Of Disturbance
Or Failure Of Main Drive Motor, Failure Of Single
Measuring Systems, Or Within The Hydraulic Area),
The Electronic Synchronization Of The Generating
Process Is Maintained Until Rotary Motions Have
Ceased                  
Full Complement Of Electrics (Motors/Control-Cabinet)
Including Two-Hand Safety Start Button For Cycle
Start & Machine Set-Up (Presently Arranged For 235
Or 470 Volt, 3-Phase, 60-Cycles), Control Voltage
Primary 110 AC, Secondary 24 DC, Single Phase)
SIEMENS-ALLIS & SIEMENS Power Controls
Coolant Filtration & Thermostatic Controlled Oil
Chiller For Hydraulic & Cutting Fluids
Air-Conditioner For Control Cabinet
Complete Coolant Equipment Pump & Piping
Full Machine Enclosure w/Splash Guards/Covers, Safety
Interlock On Splash Guard Door
CHEMAPERM Magnetic Chip Conveyor w/Chip Cart & Oil
Return Hose
Minimum Of One (1) Hob Arbor & Hydraulic Lock-Nut            
One Set Of Fixators (Machine Leveling Shoes)
Full Machine Documentation, Operator's manuals For
Machine & Controller, Wiring & Hydraulic Diagrams,
Parts Lists, & Foundation/Layout Drawings

PRINCIPAL SPECIFICATIONS:
Max Work Piece Diameter      6"/(150mm)
Max Pitch (Module) 86000 PSI Steel      5 DP/(MOD-5)
Max Hob Slide Travel      10"/(250mm)
Table Clamping Surface      4.7"/(120mm)
Max Cable Rotation      150 RPM
Min Dist Betw Hob CL & Tbl Ctr      .59"/(15mm)
Max Dist Betw Bob CL & Tbl Ctr      6.88"/(175mm)
Min Dist Betw Hob CL & Tbl Surf      2.00"/(50mm)
Max Dist Tlstck Cast To Wrkpc Tbl      24.80"/(630mm)
Min No Teeth Hobbed      3
Hob Head Swivel Range       / - 45 DEGS
Max Diameter Hob      5.20"/(132mm)
Max Hob Length      7.10"/(180mm)
Max Tangential Travel (Shifting)      7.10"/(180mm)
Hob Spindle Speed Ranges      120 - 1200 RPM
Rapid Traverse:
-Axial      157.5"/Min/(4000mm/Min)
-Radial      157.5"/Min/(4000mm/Min)
-Tangential      118.0"/Min/(3000mm/Min)
Feed Ranges:
Axial      .004-.147"/Rev/(.1-4 mm/Rev)
Tangential      .0004-.197"/Rev/(.01-5mm/Rev)
Total Connected Power      40 HP/(30 kVA)
Operating Voltage      470 V, 60Hz
Control Voltage      110 V
Floor Space: Length      162"/(4100mm)
Floor Space: Width      148"/(3770mm)
Machine OA Hgt w/Enclosure      102"
Machine OA Hgt w/Enclosure      260mm
Machine Approx Net Weight      16,060 LBS./(7,300kgs)

NOTES: Suitable For The High Speed Hobbing Of Spur
& Helical Gears, Pinions, Splines, Worm Gears, &
Other Workpieces Of Similar Profile Up To 6" (150mm)
Diameter

PRICE: F.O.B. CINCINNATI OH      $POR

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