Gear Skiving Machines LK 300/500
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Gear Skiving Machines LK 300 / 50

Skiving³: Machine, tool, and process all from a single source Increased efficiency thanks to gear skiving Customers are seeking alternative processes that are more productive and cost-effective than the gear shaping method and more flexible than broaching. Successful skiving requires the following: • Machine • Tool • Process The foundation is the rigidity by the machine: The cast iron machine bed absorbs resulting process forces. The use of flat guides in all important linear axes provides additional damping. A high spindle rigidity is attained in the machining head using a special bearing...

Axes X1 - Radial movement of machine column V1 - Tangential movement of tool Z1 - Axial movement of skiver head C1 - Rotary movement of tool C2 - Rotary movement of workpiece A1 - Swivel movement of tool Z4 - Vertical movement of tailstock C3 - Rotary movement of ringloader Z6 - Vertical movement of the NC lifting station Automatic part change The Liebherr ring loader design provides for a quick and automatic part change. Shafts and wheels with a maximum workpiece weight of up to 100 kg can be loaded and unloaded fully automatically using this tried-and-tested automation method. For...

Tool design and production Interaction of tool, technology and machine: Skiving³ Field tests have clearly shown that the mathematical mastery of the process and the coordination thereof to tool and machine is the key to success. This was proven during customer trials. Optimal tool design • Technologically ideal design for each gear • Profile calculation taking into account the crossed-axis angle and offset cutting face • Observation of collision avoidance – especially for internal gears • Optimal cutting and relief angles for the entire process

Liebherr's in-house tool production Tool design and production at locations in Ettlingen, Germany (left) and at the Liebherr-Utensili S.r.l. in Collegno, Italy (right). Materials for tool production 1. Tools made from powder-metallurgical steels (PM-HSS) have a lower invest, but are subject to increased wear. 2. Tools made from carbide metal have higher production and material cost due to more expensive raw materials and manufacturing, as well as higher grinding times and greater grinding material usage. Because they cost three times as much as PM-HSS tools, it is only worth while to use...

Additional functions Wet machining With internal gears, wet machining is advantageous because the meshed blades are cooled and lubricated so that no thermal damage occurs to the tool. Another reason is that chips that form are perfectly removed, which prevents them from being drawn into the running process. Optimal chip removal considerably increases process reliability. Plug-in coolant nozzle design With its innovative coolant nozzle design, Liebherr provides customers with the unique ability to have a specific coolant nozzle available for each workpiece. This way, complex adjustment work...

Machine • Rigid machine design • Direct drive for spindle and table for implementation of the highest dynamic rigidity • State-of-the-art user interface with LH Geartec • Wet machining (internal gearing) and dry machining possible (external gearing) • Proven ringloader concept for workpiece changing and various automation options • Integrated deburring • Optional chamfering during the machining process • Optional with fully automatic tool changer (up to 12 tools) Tool • Design and production of conical and cylindrical skiving wheels • Process optimized tool design • Tools in PM-HSS &...

Your solution provider Moscow Paris Saline Ettlingen Kempten Collegno Seoul Yongchuan Tokyo Shanghai Liebherr-Gear Technology, Inc. Liebherr Automation Systems Co. 1465 Woodland Drive Saline, MI 48176–1259 USA  +1 (734) 429-7225 +1 (734) 429-2294 info.lgt@liebherr.com Liebherr-Verzahntechnik GmbH Plant Ettlingen / Gear Tools Hertzstrasse 9–15 76275 Ettlingen Germany  +49 7243 708-0 +49 7243 708-685 tools.lvt@liebherr.com Liebherr Brasil Guindastes e Máquinas Operatrizes Ltda. Rua do Rocio, 288 Salas 81 / 82 Vila Olímpia 04552-000 São Paulo - SP Brazil  +55 11 3538 1509...