With a one-table design and a new grinding head design, the new Liebherr LGG 180 and LGG 280 machines are designed to reduce grinding times for twist-free profile and generating grinding. The machines are designed to deliver consistent high large-scale production quality in automotive applications, including conical gearing.
According to a Liebherr spokesperson, "With this series of space-saving machines, vehicle manufacturers can develop a complete production line in which all gearing components for a passenger vehicle transmission can be ground: planetary and sun gears, bore-type gears, as well as drive and pinion shafts with lengths up to 500 mm.
"The advantage to the one-table solution is higher quality throughout the entire production. There is one clamping fixture, one geometry. Every machined part is manufactured under the same conditions for the highest reproducibility. The one-table approach provides the statistical capability and reliability in continuously producing controlled µ-range finish quality for gear noise optimization."
The new grinding head allows for rotation speeds up to 10,000 RPM and has spindle power of 35 kW. With this performance data, the head enables high cutting speeds and high feedrates. The new grinding machine can exploit the potential of the 3M abrasive Cubitron II. Changing the grinding arbor with an HSK-C 100 toolholder is designed to be a fast and simple process. Also available is a second grinding head for featuring a small worm diameter for collision-critical parts.
The machine enables undulations to be applied specifically to gear wheel flanks for noise optimization purposes. According to the company, the ability to produce sub-µ range waviness cost-effectively gives designers a new range of optimization options.
The touchscreen user interface on the machine control permits easier, intuitive programming and machine operation and incorporates an integrated web cam. The control also can incorporate additional documentation, such as fixture layouts and tool mounting instructions.
The LGG machines may be coupled with Liebherr automation products to create a fully automated production line for high quality gears.
For more information contact:
Liebherr Gear Technology
1465 Woodland Drive
Saline, MI 48176-1259
734-429-7225
www.liebherr-us.com