Gear technology and automation systems
Other product segments
P.R. China (en)
LK 300 - 500

New dimensions

Highlights

    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.

    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

    X92 - Radial movement machining head | Z92 - Axial movement machining head | B92 - Rotary movement tool | Y92 - Tangential movement column | A92 - Tilting movement machining head | C92 - Rotary movement workpiece | Z6 - Vertical movement NC lifting station | A1 - Tilting movement tool | V1 - Tangential movement tool | C1 - Rotary movement tool | C2 - Rotary movement tool | Z1 - Axial movement gear skiving head | X1 - Rotary movement machine column | Z41 - Vertical travel tailstock | Z13 - Lowering device additional working area | C3 - Rotary movement ringloader | Z4 - Vertical movement tailstock arm | Z5 - Lowering workpiece gripper on ringloader

    Additional functions

    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

    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.

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    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

    VariantsLK 300LK 500LK 300 DCLK 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.

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    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

    Discover more products from Liebherr-Verzahntechnik GmbH:

    LK 300 - 500