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LiebherrGear technology and automation systems
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LC 180 - 280

The impulse generator.

Highlights

The new LC 180/280 machine platform allows for a modular design. By doing this, many different technological applications or customer-specific requirements can be implemented.

metricimperial
  • Module - 3.00 - 5.00 mm

  • Workpiece diameter - 180 - 280 mm

High flexibility
Wet and dry machining
Energy and resource efficiency

Machine concept

The new LC 180 / 280 machine platform allows for a modular design. This means many different technological applications or customer-specific requirements can be implemented. Liebherr gear hobbing machines are optimally customized to the requirements of universal usability. The high-performance gear hobbing machines are productive and manufacture in the highest quality with maximum availability.

  • Optimized base frame rigidity thanks to FEM simulation
  • Thermosymmetric machine design and integrated temperature compensation ensure consistent high quality
  • Fundamentally optimized chip removal system
  • High flexibility for various processes:
    • Gears, shafts, worm gears
    • Cluster gears
    • Skive hobbing/finish cutting
    • Position dependency
    • Milling of special profiles
  • Wet and dry machining
  • Hook-ready machine with a low space requirement, suitable for easy transfer

Axes

X1: Radial movement column slide | B1: Rotary movement tool | Z4: Vertical travel counter column | V1: Tangential movement tool | C2: Rotary movement workpiece| C3: Rotary movement ringloader| Z1: Axial travel cutter head | A1: Swivel movement tool

Gear hobbing machine LC 280 α

Your entry point into gear cutting

The LC 280 α is the perfect way for getting started with gear cutting. It offers maximum flexibility thanks to a diverse range of workpieces, well-known Liebherr quality, and low machine investment.

Thanks to the reduced scope of options, these machines can be produced and delivered at short notice. The more standardized machine can be manufactured and delivered quicker, which allows you to start with your production sooner. The entry-level model comes with the touch-based LHGearTec user interface and a ringloader concept for loading and unloading workpieces up to 25 kg. For the Alpha machines, Liebherr uses the same high-quality components as for the universal and customized machines.

Gear hobbing machines 180 / 280 (DC)

Hobbing heads

Different gear ratios are available for the hob head to cover most high torque and high RPM applications. Hollow shank tapers, steep tapers and straight shank tools are available as the interface for holding the tool. For very high spindle speed requirements, a hob head with direct drive is also available.

Table drive

For gear manufacturing machining, a workpiece drive with absolutely zero backlash is required. The table drive with spur gears is available when using conventional technology. For high performance cutting (HPC) an ultra-dynamic direct drive is available which satisfies all requirements with respect to speed and precision.

Chamfering during the machining process with ChamferCut or FlexChamfer (LC 180 / 280 DC)

With the LC 180/280 DC, the ChamferCut device is integrated on the operator side. This device has been enhanced in terms of user-friendliness. As such, the machine operator has unobstructed accessibility to both machining positions. Chip removal has also been significantly improved. Using the proven Liebherr ringloader concept, the workpiece can be transferred quickly and efficiently between the gear hobbing and chamfering machining positions. Chamfering by ChamferCut or FlexChamfer therefore takes place parallel to gear hobbing. The special feature of the chamfering unit is that it is controlled using 6 CNC axes as standard. Settings or corrections and adjustments for varying lead corrections can be executed quickly and easily using the user-friendly software.

Technical data

Module
3.00 - 5.00 mm
Workpiece diameter
180 - 280 mm
VariantsLC 180 αLC 280 αLC 180LC 280 LC 280 DCLC 280 DC
Module (mm)5.005.005.00 / 3.005.00 / 3.005.00 / 3.005.00 / 3.00
Workpiece diameter (mm)180280180280180280
Axial travel (mm)400400400400400400
Shift distance (mm)200200200200200200
Hob diameter (mm)150150150150150150
Hob speed (min-1)2,2502,2502,250 / 6,0002,250 / 6,0002,250 / 6,0002,250 / 6,000
Table speed (min-1)250250250 / 800250 / 800250 / 800250 / 800
max. module ChamferCut chamfering (mm)55
max. tool speed ChamferCut machining head (mm)2,0002,000
max. tool diameter ChamferCut (mm)130130
max. tool clamping length (bore-type cutter) (mm)236236236236236236
max. tool clamping length (shank cutter) (mm)360360360360360360

Automation & Features

Chain conveyor storage (KSR)

With the small, compact chain conveyor storage (KSR), workpieces up to 180 mm in diameter and 300 mm long can be stored and transported. The maximum total load is 75 kg. This compact workpiece storage unit can also serve as an additional buffer option, for example with a robotic workpiece feed.

Easy to maintain

Optimum machine accessibility during maintenance work is a prerequisite for ensuring productivity. For this purpose, all necessary maintenance access points are equipped with doors. Moreover, to enable quick and easy additional monitoring of specific statuses, window panes are inserted into the maintenance doors. This means the machine operator or maintenance personnel can read the signals from the outside quickly. An enclosure for the hydraulics has also been integrated into the new machine design. This ensures reductions of hydraulic power unit noise.

LC 180 - 280