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The Gear-Shaping Machines LFS and LSE 200 - 500
The Liebherr gear shaping machines are optimally tai-lored for universal use. The machine’s movable shaping head design allows manufacturing of a variety of parts with minimal setup times. With the variable height of the cutting head, it is also possible to cut multiple gears in one setup.The machine concept is based on a modular platform system, with component groups that are also used for the Liebherr hobbing and grinding machines. This permits cost effective manufacturing of individual components.The machine concept is equally suitable for dry and wet cutting. This is ensured with a newly designed machine bed.
SGA methodWith the patented SGA cutting method it is possible to use a shaping cutter without a tip relief angle as a cost ef-fective cutting tool. The clearance angle, required for the cutting action, is realized by a special cutter spindle relief cam. This can also help to prevent interference between cutter head and workpiece. This application shows the machining of a crankshaft sprocket gear using a cost ef-fective cutter, constant profile cutter.
Wafer toolsTool setups are a significant part of the overall production costs. This cost portion can be reduced with the use of wafer cutters with their constant diameter. In this applica-tion 3 gears are simultaneously cut, ensuring the highest possible production rates.
The NC Shaping HeadThe movable cutter head slide, in combination with the NC controlled helical guide, allows the universal and flexible manufacturing of internal and external spur and helical gears. The electronically controlled helical guide eliminates the time intensive change of cutter spindle guides. Additionally, the high positioning accuracy of the direct cutter spindle rotation permits the correction of the workpiece helix angle by just a few thousandth of a degree.
The Machine conceptCharacteristics•Movablecutterheadslide•6NCaxes•Fastreturnstroke(optional)•Strokelengthupto240mm(optional)•Automaticback-offcamswitching(optional) for up to 3 different back-off cams.
The machine bed as a platformPerformance and accuracy require a mechanically rigid and thermally stable machine.The machine bed with its thermo-symmetrical design meets the high demands for the different gear cutting technologies.
The table driveAchieving the highest gear quality requires a completely backlash free table drive. Additional to the gear driven ta-bles, highly dynamic direct drives are available that meet all requirements regarding speed and accuracy. This technology represents a future oriented drive concept.
X1 - Radial travel main columnY1 - Column offsetZ1 - Stroke position adjustmentZ2 - Stroke length adjustmentZ3 - Stroke travel toolZ4 - Vertical travel tailstock armB3 - Swivel of columnB4 - Tool relief motionC1 - Rotary motion toolC2 - Rotary motion work pieceC3 - Rotary motion ring loader
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PrintedinGermanybyRothBKLVT09.11_enGB Subject to modifications.
The locations
Technical Data
Easily accessible control elements, long maintenance in-tervals, short repair times: Well thought out equipment design, coupled with an optimal service concept, reduce machine down times for routine maintenance - increasing productivity and lowering life cycle costs.
Service friendly ex-worksA distinctive feature of Liebherr gear cutting machines is their service friendliness:•Quickroutinechecksandlongserviceintervalsresultin
high machine availability.•Foreasyaccess,allcomponentsaremountedon the
outside of the machine to allow fast routine mainte-nance and service.
•R+Mconcepts(reliabilityandmaintainability),usedformany years by Liebherr for aircraft component manu-facturing, is standard-practice throughout all product lines.
The Gear-Shaping Machines LFS and LSE 200 - 500
Major automotivemanufacturers have shown apprecia-tion for our efforts with international supplier awards.
The Control and Drive TechnologyThe PC based control, in combination with highly dynam-ic digital drives, guaranty excellent gear quality. The con-sistent use of standard field busses and highly integrated control modules allow a minimum of wiring.
SoftwareThe operator and programming menu screens, specifical-ly designed for gear shaping, allow direct input of drawing data into the control. Individual program packages with specially tailored menus describe internal gears, external gears, and non circular gears as well as segment gears or the turning of an indicator band.
LFS 200 LFS 300 LFS 380 LFS 500 LSE 200-500Normal module mm 5/3/12 5/3/12 5/3/12 5/3/12 12Max.cuttingdiameter mm 200 300 380 500 200-500Stroke length mm 70/100/180/215 70/100/180/215 70/100/180/215 70/100/180/215 240Centre distance cutter spindle/work table mm -50…+450* -50…+450* -50…+450* -50…+450* -50…+450*Axis angle cutter spindle / work table in
deg. ±0,28±0,5 ±0,28±0,5 ±0,28±0,5 ±0,28±0,5 ±0,4conjunctionwithcolumnswivelaxis-12+0.5°Stroke position range cutter head slide mm 250/400/600 250/400/600 250/400/600 250/400/600 300Stroke speeds infinitely variable as standard DS/min 1500/1200/800 1500/1200/800 1500/1200/800 1500/1200/800 1000Feedrotaryaxiscutter mm/min 3.750 3.750 3.750 3.750 3.750Total weight appr. kg 17.000 17.000 18.000 18.000 18.000
*withoutsteadycolumn
Service PerfectionFor highest availability
Liebherr-Verzahntechnik GmbHKaufbeurer Strasse 141, 87437 Kempten, Germany+49(0)831786-0,Fax+49(0)831786-1279www.liebherr.com,E-Mail:[email protected]
Liebherr-Verzahntechnik GmbHWerk EttlingenHertzstrasse9-1576275Ettlingen,Germany+49(0)7243708-0Fax+49(0)7243708-685E-Mail: [email protected]
Liebherr Machine Tools India Pvt. Ltd.353/354, 4thMain,9th Cross, 4th PhasePeenya Industrial Area Bangalore-560058,India+91(0)8041273033Fax+91(0)8041272625E-Mail: [email protected]
Liebherr Gear Technology, Inc.1465WoodlandDriveSaline,MI48176-1259,USA+17344297225Fax+17344292294E-Mail: [email protected]
Liebherr-Utensili S.r.l.ViaNazioniUnite1810093CollegnoTO,Italy+390114248711Fax+390114559964E-Mail: [email protected]
