Mesin hobbing gear

Liebherr LK 200

LIEBHERR LK 200 – CNC Gear Skiving Machine
Main technical data
CNC control: Siemens HMI (Liebherr LHStation / LHMobile operator concept)
Max. module: approx. 3.0 mm
Max. workpiece diameter: approx. 200 mm
Max. workpiece weight: approx. 25 kg
Table diameter: approx. 285 mm
Axial travel:
Axial stroke up to approx. 500 mm
Machining stroke / shift distance: approx. 400 mm
Max. spindle power: 16 kW
Max. workpiece spindle speed: 3,000 min⁻¹
Max. feed rate (radial): 7,500 mm/min
Hob / tool speed: up to 4,000 min⁻¹
Max. tool diameter: approx. 150 mm
Wet machining
Especially for internal gears, wet machining offers major advantages:
During the skiving process the cutting edges are cooled and lubricated, which significantly reduces the thermal load on the tools.
The chips produced are reliably removed and are not drawn back into the cutting zone.
Optimal chip evacuation leads to improved gear accuracy and superior surface quality.
LHStation & LHMobile operator concept
Liebherr intelligently separates programming and machine operation into two units:
LHStation (fixed operator panel / monitor):
Large screen area for data input and process monitoring
Multi-touch surface with additional tactile elements
Increased operating speed and process reliability
LHMobile (mobile handheld unit):
10" multi-touch as standard
Context-sensitive views such as PLC/NC keys, program status and messages
Wired signal transmission for maximum safety during setup
Ideal for ergonomic, user-friendly operation directly at the machine
Skiving³ – overview of advantages
Machine
Very rigid machine design with cast-iron bed to absorb process forces
Ringloader concept for fast workpiece change
Tailstock for shaft machining and optimum workpiece clamping
Optional chamfering during the machining process
Burst-proof enclosure, suitable for both dry and wet machining (oil or emulsion)
Tool
Design and manufacture of conical and cylindrical skiving cutters
Process-optimized tool design for every workpiece
Tools available in PM-HSS and solid carbide versions
Process
Comprehensive process analysis and simulation to determine optimum cutting conditions
Use of technology applications for customized process optimization
Collision analysis with calculation software to secure the process
Machine concept – efficiency through gear skiving
Gear manufacturers are looking for alternatives that are:
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More productive and cost-effective than gear shaping
At the same time more flexible than broaching
The LK 200 is designed exactly for this:
The basis is the high rigidity of the machine bed and skiving head (special bearing concepts, also for longer tool holders – crucial for internal gears).
Combined with a burst-proof housing, the machine is suitable for both dry and wet cutting.
The integrated tailstock unit makes the system universally usable for:
External and internal gears
Shafts and short gears on one machine
By combining machine, tool and process (Skiving³), the LK 200 offers a fully integrated solution for highly productive gear skiving.