LGP 2000 FN 2910 03
Liebherr high-performance grinding head
Liebherr-Verzahntechnik GmbH has announced the redesign of its machine platform for workpieces up to 2 m in diameter. The new series encompasses all relevant gear technologies and is aimed at manufacturers of large gears, particularly in the mechanical engineering, marine propulsion, construction machinery, and wind power industries. The lineup begins with milling and profile grinding machines designed for this size range-making it possible, for the first time, to perform precision hard machining on large workpieces, the company reported.
By expanding the platform, Liebherr now offers the entire machining spectrum in this size range and is responding to growing demand for soft and hard-fine machining from a single source. The LGP 2000 enables profile grinding of workpieces up to 2,000 mm in diameter. In the future, customers will receive a machine package that includes milling and grinding-a combination that is often used in the machining of large components.
The redesign was focused on modularity, flexibility, and reduced component diversity with the aim of optimizing delivery times and spare parts availability. All machines are built on a thermally symmetrical machine bed that is precisely temperature-regulated via circulating coolant.
"This makes gear cutting and grinding even more thermally stable than with the previous machines," explained Thomas Breith, Head of Product Management for Gear Technology.
The machines feature a high-precision, hydrostatically mounted table with wear-free direct drive. Depending on the machine type, flat or roller linear guides are used, which enable high damping during gear cutting and maximum precision during grinding and gear testing on the machine. Two main stand variants with 1,500 mm and 2,000 mm of stroke enable efficient machining of even particularly long shafts with multiple gear teeth. The platform's machines are designed to accommodate automation solutions like pallet changers and ring loaders.
A new feature is that the gear cutting machines offer an optional chamfering device with a conventional end mill (FlexChamfer) that can be used directly on the cutter head. This allows for cost-effective machining even with small batch sizes. When milling internal gear teeth, an integrated chip removal system eliminates the need for a separate, costly channel in the factory floor. The gear cutting machines are suitable for both dry and wet machining.
Various grinding head configurations are available on the LGP for profile grinding of large gears. A unique feature is the sequential use of two grinding wheels without a tool change. This allows different tool specifications to be used, which either shorten the grinding time or enable higher surface qualities to be achieved in production.
LGP allows high speed grinding and creep feed grinding. Single- or double-sided topological profile grinding and internal grinding using an optional, swiveling internal grinding arm are possible due to the modern LHGearTec. In addition to a conventional double dresser, the LGP can also be equipped with a double dresser for simultaneous dressing of both grinding wheel flanks. This allows dressing times to be almost halved and the productivity of the profile grinding machine to be significantly increased once again.
"The newly designed large machine platform offers consistent synergies across all machining processes, due in part to a uniform control interface," said a company spokesperson. "Shorter processing times for profile grinding reduce machine costs, and thus reduce unit costs for the customer. The modular design also improves the availability of spare parts, enabling high machine availability."
For more information contact:
Liebherr Gear Technology, Inc.
1465 Woodland Drive
Saline, MI 48176-1259
734-429-7225
info.lgt@liebherr.com
www.liebherr.com