|
Ceramics
can highly withstand the environments of high temperature and serious erosion, it completely substitutes for alloys which reach
their specific limitations. Turbine rotor operates in the compressed stage
with temperature over thousand Celsius degrees; it must rely on excellent
properties of ceramics to elevate the durability and lifetime. To manufacture
complex ceramic component before, industry usually uses near net shaping or
rapid prototyping (RP) processes.
A manufacturing process based on machining green ceramic turbine
component is presented here. Initially, formulating a series of machining
experiments for green ceramics to verify the idea of thesis, and analyzing
the probability of Al2O3 ceramic as a turbine material. Firstly, it needs to
check the machinability of green ceramic by face
milling. Secondly, point milling the normal plate of green compact and the
plate with analogical blade geometry to find a set of usable machining
parameters (such as
revolution speed, feed rate, step over and cutting depth); meanwhile,
addressing machining amendment by observing the final conditions of specific
geometric characteristics on workpiece. Finally,
try to machining green ceramic turbine successfully applying the above
parameters.
|