机械制造工程学外文翻译、中英文翻译、外文文献翻译.doc
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1、机械制造工程学外文翻译、中英文翻译、外文文献翻译 英文原文Manufacturing EngineeringMultitasking MachiningDone-in-one setup makes parts betterHardened gear wheels RC 62-65 are rough and finish-turned and finish-ground drilled threaded and broached on an EMAG VSC 250 DS machine Multifunction machine tools have been around long en
2、ough in various configurations for manufacturers to appreciate their potential for cost-saving quality production of parts from miniature connectors to transmission housings for off-highway equipment Development of true multitasking machineshowever has removed them from the category of special machi
3、nesManufacturers have made them one of the fastest growing categories of CNC machine tools because they improve competitiveness They offer the flexibility to meet just-in-time delivery of a variety of parts in smaller lot sizes They consolidate the processes of many machines improve accuracy and sav
4、e time formerly required for multiple setups as work was moved from machine to machine and operation to operation Finally they employ resources of people and capital equipment more efficiently a definite plus that the most astute accountants can appreciateThe most familiar multitasking machines are
5、NC lathes with live tools in the turret mill-turns and Swiss turning centers NC lathes with a Y axis that allows turrets to move from side to side have full milling or drilling capability They can mill drill and machine off the spindle centerline A B axis allows rotation around the Y axis for drilli
6、ng at an angle or contour millingsand dollars to over a million dollars That hardly qualifies them as commodity machines yet increasingly these multitasking machines form the backbone of advanced machining operations for everyone from contract manufacturers to OEMsTrends in the design of multitaskin
7、g machines include packing more punch into a limited and crowded work area with extra slides more horsepower even matching sub spindle horsepower to that of the main spindle putting more driven tools in the cut at the same time and developing sophisticated software and controls for collision-avoidan
8、ce scheduling and production analysisFor machine tool manufacturers with extensive experience in building CNC lathes and turning centers developing multitasking machines is a natural next stepRomi Machine Tools Ltd Erlanger KY developed its multitasking E series turning centers to perform turning bo
9、ring milling and tapping in one setup in a machine with a compact footprint The E 320 turning center can be configured with one or two spindlesC axis live tools and Y axis for mid to high-volume production The left spindle features a belt-driven cartridge-style gearless headstock with a high-torque
10、25 or 35-hp 186 or 261-kW GE Fanuc AC spindle motor with a variable speed driveThe right spindle can match the left spindle with a similar 25-hp spindle motor The slant-bed style E 320 series has a swing of 2755 700 mm a imum cutting length of 2362 600 mm distance between spindle faces of 4126 1048
11、mm and a cutting diam of 126 320 mm The E series includes an E 280 model which features 15-hp 111-kW spindles as well as a double-turret double-spindle E 220 modelpressure coolant air blast tool touch probe and part sensor The Hardinge-designed and built jaw chuckcollet-ready spindle design permits
12、faster spindle speeds for faster cycle times and imum part rigidity as parts are gripped close to the spindle bearings resulting in increased concentricityWhen equipped with Hardinges patented HydroGlide hydrostatic linear guideway system the Quest CNC lathes have the rigidity and precision required
13、 for hard turning as well as the improved crash protection that hydrostatic design offersThe concept of done in one rules today especially as complex parts can be machined from bar stock or from solid often eliminating the leadtime and expense involved to design and produce castings and forgings Man
14、ufacturers have been quick to recognize and study their potential for maintaining critical tolerances between features by eliminating multiple setups and the time and accuracy lost moving from operation to operationAt its Technical Center Caterpillar Inc Peoria IL works in alliance with its machine
15、tool suppliers to evaluate the potential of equipment and processes that can range from prototype work to production for next-generation Caterpillar equipment according to Jim Reeb director of manufacturing research and development Caterpillar is currently working with Cincinnati Lambs H5 Geminex se
16、ries machine for machining and turning powertrain componentsThe H5 Geminex machine is a flexible solution for processing medium-sized and large parts requiring milling and turning in a single setup combining four and five-axis machining and high-speed turningWere doing some horizontal types of machi
17、ning and turning on ductile housings says Reeb Well develop the process at the Tech Center and once its worked out well release the machine to our Decatur IL facility for installation and productionEarly experience with the potential of multitasking machine cells led Sandvik Mining and Construction
18、Sandviken Sweden to move production of its DTH down-the-hole rock drilling bits from the low-cost manufacturing environment of Mexico to Sweden in 2001 The DTH rock drilling bits are made from alloy steel forging blanks in 200 different types of which 15 types are most frequently produced in batches
19、 varying from eight to 48Making the move possible was the performance of a multitasking cell featuring three Nakamura STS-40 super multitasking turning centers with robotic workpiece handling The cell is able to perform all turning milling drilling and button-hole drilling including a hardening cycl
20、e of the alloy steel DTH drill bits in five days with 12 operators The previous conventional method required seven machines and 50 people Standardizing on the Sandvik Coromant Capto interface and selecting twin-edge tooling with two inserts in each toolholder enable each machine to independently per
21、form complete machining of drill bitsThe need to be competitive in its manufacturing processes is no less important to a machine tool builder than it is to its customers In mid-November 2005 at the unveiling of its latest investment in advanced technology at its headquarters and manufacturing facili
22、ty in Florence KY Brian Papke president Mazak Corp said It is nae to be committed to manufacturing in the US without a plan to become cost and price competitiveTo support production of its Nexus family of machines many of which have multitasking capabilities Mazak implemented lean manufacturing prac
23、tices including building to market demand rather than forecast and developing modularly assembled systems A Palletech automation system for done-in-one manufacturing was installed Production capacity for Nexus machines at its Florence facility has risen to 140 machines per monthRotomill MPMC machine
24、s can turn mill both with B axis and U axis as well as drill tap or hob complex workpiecesManufacturing cells at Mazaks Florence facility feature Integrex multitasking machines produced by parent company Yamazaki Mazak Oguchi Japan Mazak has installed two Integrex-500HS multitasking machines teamed
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