Shallow analyse of characteristic of high speed machining center and development
High speed cutting (High Speed Cutting) studies but date from comes 30 time by Solomon (the patent that Salomons) place puts forward and wins Germany. The relevant technology that passes effort of a few years and high speed cutting matures gradually, up to now, a when technology of high speed cutting is rising abruptly quickly advanced production technology, to mechanical manufacturing industry progress produced far-reaching effect. The most crucial technology that implements high speed cutting is the machine tool of high speed cutting that studies development performance is good, from 20 centuries since 80 time metaphase, machine tool of cutting of development high speed makes the main trend that technology of international machine tool industry develops. The high speed machining center that gets used to high speed cutting to machine a requirement at present and machine tool of numerical control of other high speed already were the trend that popularizes application inside industrial developed country, and the production that our country also is accelerating machining center of development high speed and research application, according to preliminary count, the last few years imports high speed machining center to be as high as several dollars, already was the entrance heat that our country makes productive trade department.
The characteristic of high speed machining center and development introduce below:
High speed main shaft
High speed main shaft is one of parts with high speed the most crucial machining center. At present main shaft rotate speed gains ground more and more in the machining center of 20000 ～ 40000r/min, the main shaft rotate speed of the high speed machining center of a few Europe has achieved 60000r/min, rotate speed is as high as 100000r/min above to exceed high speed main shaft to also be in development development. Pass of the rotate speed of high speed machining center, horsepower, dynamic balance, rigid, taper and heat are out of shape character, have to the tigidity of high speed machining center and thermal stability quite the influence of degree. Close with respect to main shaft of machining center of requirement high speed and electric machinery so 2 for one, make electric main shaft, implementation does not have the straight drive of intermediate link, reduce drive disk assembly, have higher reliability.
Bearing of main shaft main shaft also is the crucial part that decides main shaft life and bear capacity. For comfortable machine to high speed cutting, what the main shaft design of high speed machining center used advanced main shaft bearing is lubricant, medicinal powder hot technology. At present high speed main shaft basically uses 3 kinds of special bearing: (Bearing of 1) pottery and porcelain; (Bearing of 2) magnetic force; (3) air bearing. Main shaft bearing lubricates the it is main to raise a move effect of pair of main shaft rotate speed, high speed main shaft uses oily air to lubricate commonly or fuel injection lubricates.
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