LK 180 - 280 | Gear skiving machine

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LK 180 - 280

Equipped for everything

Highlights

metric

imperial

Module - 3.00 mm
3.00 mm
Workpiece diameter - 180 - 280 mm
180 - 280 mm

Advantages of Skiving³

Machine

- Rigid machine design
- Ringloader concept for fast workpiece change
- Tailstock for shaft machining and optimum workpiece clamping
- Optional chamfering during the machining process

Tool

- Design and manufacturing of conical and cylindrical skiving cutters
- Process optimized tool design
- Tools in PM-HSS & carbide versions

Process

- Process analysis and simulation for optimal cutting conditions
- Use of technology applications for optimal customer support
- Collision analysis with calculation software

Machine concept

Increased efficiency thanks to gear skiving

Gear teeth manufacturers are seeking alternative processes that are more productive and cost-effective than the gear shaping method and more flexible than broaching.

Successful gear skiving by means of:

Machine
Tool
Process

The foundation for successful gear skiving is the rigidity of the machine: The cast iron machine bed absorbs the occurring process forces. In the machining head, a high spindle rigidity is achieved by means of a special bearing concept, which means that longer tool holders can also be used. This is particularly important for machining internal gears.

In combination with a burst-proof housing, the machine is suitable for both dry and wet machining with oil or emulsion.

In addition to the machine, the appropriate tool is crucial for a stable process. Our in-house tool development and manufacturing enables us to design the optimal tool for every workpiece - based on our vast knowledge of the gear skiving process.

The planned process must be taken into account when designing tools. Our intensive technological development and extensive tests on customer projects have given us a complete understanding of gear skiving and, with Skiving³, we offer a complete solution consisting of machine, tool and process.

The tailstock makes the machine suitable not only for external and internal gears but also for shafts.

Additional functions

Chamfering during the machining process with LK 180 / 280 DC

With every machining process, sharp edges and burrs result from tool runout. We offer the new FlexChamfer technology to remove these during the machining process. The gears are chamfered with a standard end mill. The movements of the tool are NC-controlled and therefore ensure high reproducibility and chamfer quality.

Chamfering during the machining process with LK 180 / 280 DC

With every machining process, sharp edges and burrs result from tool runout. We offer the new FlexChamfer technology to remove these during the machining process. The toothed gears are chamfered with a standard shank cutter. The movements of the tool are NC-controlled and therefore ensure high reproducibility and chamfer quality.

Chamfering during the machining process with LK 180 / 280 DC

Axes

Centering a gear / position-dependent gear cutting

A centering process is necessary for position dependency or hard machining. For this, Liebherr offers a simple solution by means of a meshing sensor on the gear skiving head. Customized solutions can be developed as needed.

Wet machining

With internal gears, wet machining is advantageous because the cutting edge are cooled and lubricated, which reduces the thermal load on the tools. Another reason is that chips that form are perfectly removed, which prevents them from being drawn into the running process. Optimum chip removal significantly increases the gear and surface quality.

Maximized operator friendliness

The new optimized control panel LHStation & LHMobile

With the control panel, Liebherr intelligently divides the programming and operation of the machine between two system parts: The large, fixed monitor unit LHStation for data input and process monitoring and the standardized, mobile handheld terminal LHMobile with context-sensitive user guidance during setup. Both units have a multi-touch surface as well as tactile elements for optimum operating speed and operating safety.

Mobile handheld unit LHMobile

10-inch multi-touch as standard
Context-sensitive views such as PLC/NC keys and program statuses
Wired signal transmission for maximum safety

The programming system by Liebherr: 25% faster setup time

With the LHGearTec software, the system constantly guides users when entering workpiece and tool data, as well as during workpiece correction and process monitoring. The user guidance has been redefined in intensive cooperation with designers and users.

More information

Technical data

Module	3.00 mm
Workpiece weight	25 kg
Axial travel	400 mm
Shift distance	400 mm
Swivel angle of gear skiving head	30 °
Max. spindle power	16 kW
Hob speed	4,000 min-1
Tool diameter	150 mm

Variants

	LK 180	LK 280	LK 180 DC	LK 280 DC
Workpiece diameter (mm)	180	280	180	280

Tool and technology competence

Interaction of tool, process and machine: Skiving³

Field tests have clearly shown that the key to success is mathematical and technical control of the tools and the process, as well as coordination of the technology to the tool and machine. This has been proven in various applications during customer trials.

Optimal tool design

Ideal technological design for every gear
Accurate profile calculation taking account of the axial crossing angle and cutting face offset
Avoidance of collisions ensured especially for internal gears
Optimal cutting and clearance angles for the entire process
Design, manufacture, and use of both conical and cylindrical tools is possible

Liebherrs in-house tool production

Liebherr offers a comprehensive range of gear cutting tools, many years of experience in gear manufacturing, and the highest level of product quality down to the smallest detail. Our gear skiving tools are manufactured at our sites in Ettlingen, Germany and Collegno, Italy.