| 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 |