parts ", its performance index direct decision the level of machine tool,
it is that machine tool realizes basic condition and the prerequisite of
high speed processing.
2 the working principle electrical main shaft of the working principle,
typical structure and 2.1 advantage electrical main shafts of electrical
main shaft is the direct motor rotor of be hollow pack in main shaft on,
stator knows super-cooling but cover fixes , form a complete unit of main
shaft in the casing hole of main shaft, after starting eclectricity rotor
directly drive the operation of main shaft.
The typical structural layout way of the typical structural electrical unit
of main shaft of 2.2 electrical main shafts is that generator sets up
before main shaft , rear axle Cheng between ( as picture show ), its
advantage is that the axial size of the unit of main shaft is the big,
medium-sized machine tool of numerical control short comparatively, the
rigidity of main shaft big, power suits comparatively; It is insufficient
to be the naturally scattered hot condition in the generator in the casing
of main shaft that encloses to differ from , has higher temperature rise.
The 1 casings of main shaft the 2 cooling sets of 3 4 5 import stator
rotors of cooling water the 6 sets of 7 8 9 10 former 11 can export
feedback installation bearing rear axles of cooling water of runner shaft
of main shaft of main shaft Cheng the advantage electrical province of main
shaft of 2.3 electrical main shafts have gone to take ship or positive
drive, the 0 transmissions that have realized machine tool have raised
transmission efficiency. The rigidity of electrical main shaft good, rotary
precision is sex high respond fast good, can realize very high rotational
speed and add and slow down degree and decide angle stop fast definitely
( C axle control ), the scope of speed adjustment is wide.
3, the crucial technical concept of " electrical main shaft " of electrical
main shaft should not be simple to understand for the merely a sleeve of
main shaft , and should be a set of assembly, include: Stator, rotor,
bearing, the high speed installation of frequency conversion and
lubrication install and cool installation. Therefore electrical main shaft
is the with high speed bearing technical, lubrication technical, cooling
technical technical, precise production of dynamic balancing with the
technologies such as assembly technology as well as generator high speed
drive synthesize to utilize.
The with high speed bearing technology of 3.1 electrical main shafts
realizes the electrical high speed of main shaft to melt, is precise and
crucial to be the application of high speed precise bearing. Now the
bearing that applied in high speed precise electrical main shaft have
precise roll bearing and liquid movement press bearing and gas press
bearing and magnetic suspension bearing quietly, but it is precise angle
contact porcelain ball bearing and precise cylinder roller bearing mainly.