Gear Grinder Designed for Large-Scale Production Quality

The Liebherr LGG 280 gear-grinding machine is designed to reduce grinding times for twist-free profile grinding and generating grinding of workpieces ranging to 280 mm in diameter. The machine is the second in the LGG series and is designed to deliver consistent, large-scale production quality in automotive applications, including conical gearing. The machine enables users to produce smaller gears with greater load-carrying capability.

As part of a production line, the machine’s one-table solution is said to promote higher quality throughout production with one clamping fixture and one geometry. This approach promotes reliable micron-range finish quality for gear-noise optimization.

The grinding head supports rotation speeds ranging to 10,000 rpm and features 35 kW of spindle power, enabling high cutting speeds and feed rates. According to the company, the machine can utilize the potential of the 3M abrasive Cubitron II. Other features include an HSK-C100 toolholder for changing the grinding arbor and a second grinding head featuring a small worm diameter for collision-critical parts.

The machine enables the application of undulations specifically to gear wheel flanks for noise optimization. The ability to produce sub-micron-range waviness provides a range of optimization options. The touchscreen user interface is said to ease programming and machine operations and includes an integrated webcam. Machine control also incorporates documentation such as fixture layouts and tool mounting instructions. Liebherr says the LGG machines are easily paired with the company’s automation solutions to create a fully automated production line for quality gears with reduced cycle times.