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

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.

The hob head provides greater flexibility and productivity. Workpieces up to a module of 5 millimeters can be machined. The spindle speed has been increased by 50% to 2,250 revolutions per minute compared to the previous model. At the same time, the shift distance has been extended by 11 % to 200 millimeters, and the maximum tool diameter has been increased by 67 % to 150 millimeters.

• Drive power: 13 kW
• Speed of cutter spindle: 2,250 rpm
• Max. module: 5 mm
• Shift distance: 200 mm
• Max. hob diameter: 150 mm

Alongside the default gear cutter head, a directly driven cutter head is also available as an option. The directly driven cutter head features high speeds of up to 6,000 rpm and high drive power of 23 kW. It offers sufficient reserves for future tool developments.

• Drive power: 23 kW
• Speed of cutter spindle: 6000 rpm
• Max. module: 3 mm
• Shift distance: 180 mm
• Max. hob diameter: 90 mm

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.

LC 180 / 280 DC with integrated ChamferCut device

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}

FlexChamfer

As an alternative, we offer the new FlexChamfer technology. The gears can be chamfered quickly and efficiently using a standard milling tool. The movements of the tool are also fully NC-controlled, ensuring high repeatability and chamfer quality. This process is ideal for workpieces with interfering contours or when there is a very large part variance and small batch sizes.

ChamferCut advantages

- Parallel gear hobbing and defined deburring / chamfering
- Dry and wet machining possible
- Precision chamfering geometry
- Highest chamfer quality and repeatability
- No bulging or material deformation
- Tooth root chamfering as standard
- Very long tool life ChamferCut tools can be easily reground 15 to 20 times at low cost
- Lowest tool costs per workpiece compared to traditional processes
- Short amortization period thanks to low tool costs per workpiece
- wide module range from 0.8 to 42 mm
- 2nd cutting during gear hobbing is unnecessary thereby increasing tool life quantity at the gear hob
- Short setup times

Advantages FlexChamfer

• Flexible and universally applicable
• Ideally suited for workpieces with interfering contours
• Precision chamfering geometries
• Highest repeatability
• Simple NC corrections possible
• Use of standard tools (quickly available from stock)