LK 300 - 500 | Gear skiving machine

LK 300 - 500

New dimensions

Highlights

Compare

Maximum flexibility

- Enlarged work area

- NC counter column for long shafts

- FlexChamfer: the most flexible chamfering solution on the market

Maximized productivity

- Fast axis movements thanks to optimized drive design

- Very short setup times thanks to Liebherrs clamping fixture quick change

Improved ergonomics

- Fold-out steps for easy access

- Optimum accessibility for maintenance work

- Ergonomic machine operation thanks to LHStation and LHMobile

Machine concept

Increased efficiency thanks to gear skiving

Gear 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.

liebherr-skiving-lk-300-500-process-text

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 assuming that the theory of skiving has been absorbed and understood.

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.

Axes

Additional functions

liebherr-skiving-lk-300-500-tool-changer2

Automatic workpiece change

The new NC ringloader is now available for a fast and automatic workpiece change. Shafts and wheels with a maximum workpiece weight of up to 100 kg can be loaded and unloaded fully automatically using this automation variant adapted to gear skiving.

For a matching external automation system, Liebherr offers additional customized solutions such as robot loading or workpiece feed using plastic chain or hinged chain conveyors.

Wet machining

With internal gear, wet machining is advantageous because the meshed blades 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.

Coolant nozzles quick change concept

With its innovative coolant nozzle design, Liebherr provides customers with the unique ability to have a specific coolant nozzle available for each workpiece. This way, complex adjustment work during the setup process can be significantly reduced and the process is far more stable. The coolant nozzle set is changed using a quick-change clamping fixture.

Deburring

As with every machining process, burrs result from tool runout. To remove these quickly and cost-effectively, Liebherr offers an adaptable turning tool on the gear skiving head. Using the turning tool and the corresponding software, these burrs can be removed without problems. The tip diameter can also be turned in the same machining step.

Centering a gear

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.

Maximized operator friendliness

liebherr-gear-hobbing-lc180-280-control-panel

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.

liebherr-gear-hobbing-lc180-280-control-panel1

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

liebherr-skiving-lk-300-500-control-panel

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

01/03

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 wheels
Process-optimized tool design
Tools in PM-HSS & carbide versions

Process

Process analysis and simulation for optimal cutting conditions
Application technology for optimal customer support
Collision analysis with calculation software

Technical data

Variants	LK 300	LK 500	LK 300 DC	LK 500 DC

Tool and technology competence

Interaction of tool, technology 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

01/02

liebherr-skiving-lk-180-280-tools-factory

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.

Discover our tools