The CNC Gear-Hobbing Machines LC 200 – · PDF fileThe CNC Gear-Hobbing Machines LC 200...

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The CNC Gear-Hobbing Machines LC 200 – 500

Transcript of The CNC Gear-Hobbing Machines LC 200 – · PDF fileThe CNC Gear-Hobbing Machines LC 200...

Page 1: The CNC Gear-Hobbing Machines LC 200 – · PDF fileThe CNC Gear-Hobbing Machines LC 200 – 500 Liebherr Machine Tools India Pvt. Ltd. 353/354, 4th Main, ... gear cutting. For conventional

The CNC Gear-Hobbing Machines LC 200 – 500

Liebherr Machine Tools India Pvt. Ltd.

353/354, 4th Main, 9th Cross, 4thPhasePeenyaIndustrialAreaBangalore-560058,India

� +91 (0)80 4127 3033 Fax +91 (0)80 4127 2625E-Mail: [email protected]

Page 2: The CNC Gear-Hobbing Machines LC 200 – · PDF fileThe CNC Gear-Hobbing Machines LC 200 – 500 Liebherr Machine Tools India Pvt. Ltd. 353/354, 4th Main, ... gear cutting. For conventional

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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 signifi cant 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.

Page 3: The CNC Gear-Hobbing Machines LC 200 – · PDF fileThe CNC Gear-Hobbing Machines LC 200 – 500 Liebherr Machine Tools India Pvt. Ltd. 353/354, 4th Main, ... gear cutting. For conventional

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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 4500 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.

Page 4: The CNC Gear-Hobbing Machines LC 200 – · PDF fileThe CNC Gear-Hobbing Machines LC 200 – 500 Liebherr Machine Tools India Pvt. Ltd. 353/354, 4th Main, ... gear cutting. For conventional

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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:• PCbasedcontroltechnology• digitaldrivetechnology• integratedPLC• advancedfieldbussystems(profibus)• TFTflatscreen• optionalnetworkintegration• dialoginputtailoredtogearmachining• Teleservice• Diagnostictools

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 flexibleuseviaaquickchangesystemforworkpiecegrip-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.

Page 5: The CNC Gear-Hobbing Machines LC 200 – · PDF fileThe CNC Gear-Hobbing Machines LC 200 – 500 Liebherr Machine Tools India Pvt. Ltd. 353/354, 4th Main, ... gear cutting. For conventional

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Technical DataLC 200 LC 300 LC 380 LC 500

Max. workpiece diameter mm 200 300 380 500mm 7 7 7 7

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 300 360 400 400Hob-head swivel degrees +/- 45 +/- 45 +/- 45 +/- 45Max. shift/tangential travel mm 200/300 200/300 200/300 200/300Max. hob diameter mm 160 160 160 160Max. 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. 5,000 5,000 5,000 5,000Hob-spindle speed ranges rpm 500 500 500 500

rpm 750 750 750 750rpm 1200/1500/4500 1200/1500/4500 1200/1500/4500 1200/1500/4500

Cutter-spindle drive capacity kW 14/27 14/27 14/27 14/27Total weight of machine with tailstock column ca. kg 15.000 15.000 15.000 15.000Total connected load ca. kVA 35-50 35-50 35-50 35-50

Page 6: The CNC Gear-Hobbing Machines LC 200 – · PDF fileThe CNC Gear-Hobbing Machines LC 200 – 500 Liebherr Machine Tools India Pvt. Ltd. 353/354, 4th Main, ... gear cutting. For conventional

PrintedinGermanybyRothBK04.11 Subject to modifi cations.

The locations

Liebherr-Verzahntechnik GmbHKaufbeurer Strasse 141, D-87437 Kempten� +49 (0)831 786-0, Fax +49 (0)831 786-1279www.liebherr.com, E-Mail: [email protected]

Liebherr-Verzahntechnik GmbHWerk Ettlingen

Hertzstrasse 9-15D-76275 Ettlingen

� +49 (0)7243 708-0 Fax +49 (0)7243 708-685E-Mail: [email protected]

Liebherr-Gear Technology Co.

1465 Woodland DriveSaline, MI 48176-1259USA

� +1 7 34 429 7225 Fax +1 7 34 429 2294E-Mail: [email protected]

Liebherr-Utensili S.r.l.

Via Nazioni Unite 18I-10093 Collegno TO

� +39 (0)11 4 24 87 11Fax +39 (0)11 4 55 99 64E-Mail: [email protected]

Liebherr Machine Tools India Pvt. Ltd.

353/354, 4th Main, 9th Cross, 4thPhasePeenyaIndustrialAreaBangalore-560058,India

� +91 (0)80 4127 3033 Fax +91 (0)80 4127 2625E-Mail: [email protected]