Gear technology and automation systems
Weitere Produktsegmente
Taiwan, China (en)
LCS 600 - 1200

Large dimensions. Fantastic technology.

Highlights

    Generating grinding up to module 14mm
    Generating grinding workpieces up to 1,200mm in workpiece diameter
    Workpiece automation up to a workpiece diameter of 800mm and a workpiece weight of 1,000kg

    Machine design

    The new LCS Series 3 provides a machine system for the hard-fine machining of gears, which is characterized by its outstanding efficiency and versatility: generating or profile grinding with dressable or electro-plated CBN tools.

    Gear grinding with dressable worms or discs has been a successful and well established technology for many years. Today, with the use of sintered corundum tools, it has reached a remarkable performance level.

    With the LCS series, Liebherr enables the user to use both technologies without limitation, unlocking completely new possibilities in particular generating grinding the sorts of larger gears used in the wind power industry, for example.

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    The grinding heads, with their proven design principle, provide motor spindle speeds up to 12,000rpm. Their high degree of thermal stability is essential for achieving unparalleled quality.

    Active tool holding on both ends guarantees excellent tool rigidity. This allows for feed rates up to 10m/min and a cutting speed of 100m/s.

    With the two-station ringloader, workpieces up to 800mm in diameter can be automatically loaded and unloaded. Storage systems are available for unmanned operation of the machine.

    Axes

    A1 - swivel movement of tool | B1 rotary movement of tool | B3 - dressing tool axis | C1 - table axis | C3 - rotary movement of ringloader | C5 - dresser swivel axis | V1 - tangential movement of tool | X1 - radial movement of machine column | Z1 - axial movement of tool | Z4 - vertical motion of tailstock | Z5 - vertical motion of ringloader

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    Double dresser

    Double dresser for dressing grinding worms or form grinding discs with two independent, frequency-controlled dressing spindles.

    Functional principle:

    • Single flank dressing
    • Dressing of the tooth tip via rotating radius roller
    • Pressure angle correction via C5 axis

    Advantages:

    • Easy to use universally
    • With radius control, the sharp-edged transition from the tooth flank into the area of the tooth root can be avoided
    • Longer radius roller life compared to dressing plate
    • Avoidance of grain chipping in the area of the grinding worm head means greater process stability

    Application examples

    Video

    Generating grinding large modules on the LCS 700 generating and profile grinding machine

    Dressing, grinding and loading on the LCS 600 generating and profile grinding machine

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    GH 3.0

    Drive power (kW): 35
    Speed (rpm): 12,000
    Max. cutting speed (m/s): 80
    Max. grindable module generating grinding (mm): 12
    Max. grindable module profile grinding (mm): 20
    Max. shift distance (mm): 320
    Dimensions of grinding worm (DxLxW) (mm): 320x230x110
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    GH 320 CB

    Drive power (kW): 28.5
    Speed (rpm): 10,000
    Max. cutting speed 80m/s
    Max. generating grinding module 14mm
    Max. profile grinding module 20mm
    Max. shift distance (tangential distance) 350mm
    Dimensions of grinding worm (DxLxW) (mm): 320x250x110
    Feature: For this grinding head, various different internal grinding arms are available
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    On-board inspection: Gear checking in the machine

    All grinding heads can be equipped with an optional swivel-in probe for gear checking.

    Gear measurement

    • Profile and lead
    • Concentricity, single and cumulative pitch
    • Twist check
    • Measuring system for grinding stock removal
    • Rolling measurement
    • Determining dimension measurement

    Video

    On-board inspection on the LCS 600 generating gear grinding machine

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    Mobile meshing sensor

    Technology

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    Prepared for the future

    Gearing types

    • Asymmetric profile
    • Beveloid gears
    • Double helical gears
    • Cycloidal gears

    Gear modification

    • Profile and lead modification
    • Free flank form

    liebherr-gear-grinding-lgg-180-280-asymmetrical-gears

    Generating grinding asymmetric gears

    Asymmetric gears compensate for unequally distributed loads.

    The advantages of asymmetric gears are obvious:

    • Reduced tooth root clamping forces and Hertzian flank stresses
    • Improved specific sliding
    • Increased surface durability and tooth root strength
    • Increased power density (load capacity in relation to gear size)
    • Longer service life
    • Increased efficiency
    • Reduced noise and vibration excitation
    • Increased operational reliability
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    liebherr-gear-grinding-lgg-180-280-topological-grinding

    Topological modifications

    • TF twist-free grinding
    • DFT deviation-free topological grinding
    • GER generated triangle-shaped end relief

    Modifications for noise reduction

    • SSG noise-reduction shift strategy
    • NEO noise excitation-optimized modifications

    Video

    Generating grinding and dressing on the LCS 800 generating gear grinding machine

    Automation

    Available for LCS 600, LCS 700 and LCS 800

    Technical data

    VariantsLCS 600LCS 700LCS 800LCS 1000LCS 1200

    Discover more products from Liebherr-Verzahntechnik GmbH:

    LCS 600 - 1200