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The Gear-Hobbing Machines LC 200 – 500
Liebherr-Verzahntechnik GmbHWerk EttlingenGear cutting toolsHertzstraße 9-1576275 Ettlingen, Germany +49 (0)7243 708-0Fax +49 (0)7243 [email protected]
Liebherr-Utensili S.r.l.Gear cutting toolsVia Nazioni Unite 1810093 Collegno TO, Italy +39 (0)114 248711Fax +39 (0)114 [email protected]
Liebherr-Gear Technology Inc.Machine toolsLiebherr Automation Systems Co.Automation systems1465 Woodland DriveSaline, MI 48176-1259, USA +1 7344 297225Fax +1 7344 [email protected]
Liebherr-Machine Tools India Pvt. LtdMachine tools353/354, 4th Main, 9th Cross, 4th PhasePeenya Industrial AreaBangalore - 560 058, India +91 (0)80 41 273033Fax +91 (0)80 41 [email protected]
With around sixty years of experience in the field, Liebherr is one of the world‘s leading manufacturers of CNC gear cutting machines, gear cutting tools and automation systems. These innovative products are the result of advanced ideas, highly qualified employees and the latest manufacturing systems at each of their locations. They are characterised by economy, ease of use, quality and reliability in combination with a high degree of flexibility.Liebherr employs approximately 1,200 people in the field of machine tools and automation technology and has production facilities in Kempten and Ettlingen (Germany), Collegno (Italy), Saline (Michigan, USA) and Bangalore (India). They are supported by expert and reliable marketing and service specialists at a large number of locations worldwide.
Machine Tools and Automation Systems by Liebherr
High-Quality Gear Cutting ToolsLiebherr manufactures high-quality precision tools for the soft and hard machining of gears and all Liebherr gear cutting machines are fitted with these tools. The range also includes Lorenz stock tools and products customised for specific applications.
Automation Systems for a Wide Range of ApplicationsLiebherr has a wide range of products for linear portals, pallet-handling systems, conveyor systems and robot integration for projects in all areas of production and can provide above-average availability of systems.
www.liebherr.com
System Solutions for Gear Cutting MachinesThe Liebherr range in the field of gear cutting machines includes gear hobbing machines, gear shaping machines and hobbing and profile grinding machines, all noted for their high degree of stability and availability. Liebherr can supply all technologies required for the manufacture of high-quality gears and is continuously developing these technologies. Particular importance is attached to the energy efficiency of the machines.Gear cutting machines from Liebherr are supplied to renowned manufacturers of gears and gearboxes as well as large-scale slewing rings worldwide. They are in demand primarily from the automotive and construction machin-ery industries and also increasingly from the windpower industry for the manufacture of gears for wind turbines.
Liebherr-Verzahntechnik GmbHMachine tools, automation systemsKaufbeurer Straße 141, 87437 Kempten, Germany +49 (0)831 786-0, Fax +49 (0)831 786-1279www.liebherr.com, e-mail: [email protected]
Subject to change without prior notice.
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The Machine ConceptIn gear manufacturing, the technology of high-speed dry hobbing has substantially reduced cutting times and ma-chining costs while increasing workpiece quality and en-vironmental protection. Originally introduced by Liebherr, this process has met with tremendous success.The new demands of this modern technology include higher hob and table speeds, reliable removal of the hot chips, and machine-wide management of the consider-able process heat. The proven machine concept also of-fers a number of significant new developments: the com-pletely symmetrical design of the machine’s structur-al components and the closed oil-circulation loop in the machine bed assure an extremely uniform temperature distribution and therefore thermal stability – important for consistently high workpiece quality.
To take advantage of the substantially lower machining times of high-speed hobbing, fast load and unload cy-cles are required. With the newly developed automation system, the part change time is less than four seconds. Modular workpiece storage units expand the machine pe-riphery.In the development of the overall machine concept, the “lean” philosophy was a central issue. The new gener-ation Liebherr machines are compact, fast, reliable and competively priced. The future belongs to the new tech-nology of high-speed dry hobbing. We are making a de-cisive contribution to this economically and ecologically important development.
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The Machine BedThe rigidity of the machine structure was optimized using FEA simulation.Steep side walls and two integrated chip augers offer ef-ficient and reliable chip removal. This is especially impor-tant for dry cutting.
The Hob HeadA maintenance free direct drive AC motor is used for the hob spindle. Drive power up to 27 kW and speeds up to 3000 rpm offer large reserve capacity for future tool de-velopments. For very high torque requirements the hob head is equipped with a reduction gear drive. The tool interface is offered either with a hollow shaft ta-per (HSK), a collet or a steep taper (ISO).
The Machine Table with direct or gear driveA backlash free table drive is essential for high precision gear cutting. For conventional cutting technology, a prov-en backlash free gear driven table is available. For high performance cutting, a high dynamic direct drive is avail-able to meet all requirements for spindle speed and ac-curacy.
Integrated roll deburring and chamferingRoll deburring and chamfering of the gear teeth, with re-moval of secondary burr, is suitable for bore and shaft parts. The deburring and chamfering operation is parallel to the main cutting time.
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The Controls – Intelligence from ExperienceIn standard, the machines are delivered with Siemens-control in connection with Siemens-drives.
The essential features of these advanced controls are:• PC based control technology • digital drive technology• integrated PLC• advanced field bus systems (profi bus)• TFT flat screen• optional network integration• dialog input tailored to gear machining• Teleservice• Diagnostic tools
With these customer-oriented options, we satisfy the de-mands of the international markets.
Versatile Workpiece Handling The tailstock column enables manual and automatic load-ing / unloading of bore- and shaft-type parts for dry and wet machining. The workpieces may optionally be clamped table-side with high clamping force or – for shorter cycle times – with an NC tailstock arm. Liebherr offers automatic load-ing/unloading and storage systems for a wide range of workpieces. Furthermore, the machine can be integrated into cell or line concepts.The machine offers quick change-over possibilities for flexible use via a quick change system for workpiece grip-per and fixtures.
Automation - for any RequirementThe Liebherr automation systems are based on long ex-perience, i.e. they are proven and effective solutions. For stand-alone machines, machining cells or production lines Liebherr is the competent partner.
High Uptime - Friendly MaintenanceThe high performance of the machine requires low down-times and an easy maintainability. This is a prime asset of Liebherr. Therefore all control elements are integrated in the machine housing with ideal accessibility.
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Technical DataLC 200 LC 300 LC 380 LC 500
Max. workpiece diameter mm 200 300 380 500mm 7 (12) 7 (12) 7 (12) 7 (12)
Max. axial travel mm 600 600 600 600Table diameter mm 180 250 320 320Table speed rpm 100/200/400 100/200/400 100/200/400 100/200/400Center Distance between hob and table min. mm 15 15 15 15
max. mm 400 400 400 400Hob-head swivel Shift 200 mmHob-head swivel Shift 300 mm
degrees+/- 45+/- 35
+/- 45+/- 35
+/- 45+/- 35
+/- 45+/- 35
Max. shift/tangential travel mm 200/300 200/300 200/300 200/300Max. hob diameter mm 160 (220°) 160 (220°) 160 (220°) 160 (220°)Max. hob length mm 230/330 230/330 230/330 230/330Axial rapid travel mm/min. 10,000 10,000 10,000 10,000Radial rapid travel mm/min. 7,500 7,500 7,500 7,500Tangential rapid travel mm/min. 3,000 3,000 3,000 3,000Hob-spindle speed ranges rpm 500 500 500 500
rpm 750 750 750 750rpm 1200/1500/3000 1200/1500/3000 1200/1500/3000 1200/1500/3000
Cutter-spindle drive capacity kW 14/27 14/27 14/27 14/27Total weight of machine with tailstock column ca. kg 16,000 16,000 16,000 16,000Total connected load ca. kVA 35-50 35-50 35-50 35-50
* FK 2.3
Liebherr-Verzahntechnik GmbHWerk EttlingenGear cutting toolsHertzstraße 9-1576275 Ettlingen, Germany +49 (0)7243 708-0Fax +49 (0)7243 [email protected]
Liebherr-Utensili S.r.l.Gear cutting toolsVia Nazioni Unite 1810093 Collegno TO, Italy +39 (0)114 248711Fax +39 (0)114 [email protected]
Liebherr-Gear Technology Inc.Machine toolsLiebherr Automation Systems Co.Automation systems1465 Woodland DriveSaline, MI 48176-1259, USA +1 7344 297225Fax +1 7344 [email protected]
Liebherr-Machine Tools India Pvt. LtdMachine tools353/354, 4th Main, 9th Cross, 4th PhasePeenya Industrial AreaBangalore - 560 058, India +91 (0)80 41 273033Fax +91 (0)80 41 [email protected]
With around sixty years of experience in the field, Liebherr is one of the world‘s leading manufacturers of CNC gear cutting machines, gear cutting tools and automation systems. These innovative products are the result of advanced ideas, highly qualified employees and the latest manufacturing systems at each of their locations. They are characterised by economy, ease of use, quality and reliability in combination with a high degree of flexibility.Liebherr employs approximately 1,200 people in the field of machine tools and automation technology and has production facilities in Kempten and Ettlingen (Germany), Collegno (Italy), Saline (Michigan, USA) and Bangalore (India). They are supported by expert and reliable marketing and service specialists at a large number of locations worldwide.
Machine Tools and Automation Systems by Liebherr
High-Quality Gear Cutting ToolsLiebherr manufactures high-quality precision tools for the soft and hard machining of gears and all Liebherr gear cutting machines are fitted with these tools. The range also includes Lorenz stock tools and products customised for specific applications.
Automation Systems for a Wide Range of ApplicationsLiebherr has a wide range of products for linear portals, pallet-handling systems, conveyor systems and robot integration for projects in all areas of production and can provide above-average availability of systems.
www.liebherr.com
System Solutions for Gear Cutting MachinesThe Liebherr range in the field of gear cutting machines includes gear hobbing machines, gear shaping machines and hobbing and profile grinding machines, all noted for their high degree of stability and availability. Liebherr can supply all technologies required for the manufacture of high-quality gears and is continuously developing these technologies. Particular importance is attached to the energy efficiency of the machines.Gear cutting machines from Liebherr are supplied to renowned manufacturers of gears and gearboxes as well as large-scale slewing rings worldwide. They are in demand primarily from the automotive and construction machin-ery industries and also increasingly from the windpower industry for the manufacture of gears for wind turbines.
Liebherr-Verzahntechnik GmbHMachine tools, automation systemsKaufbeurer Straße 141, 87437 Kempten, Germany +49 (0)831 786-0, Fax +49 (0)831 786-1279www.liebherr.com, e-mail: [email protected]
Subject to change without prior notice.Printed in Germany by Eberl BK 0.2-07.14_enGB
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