dc.description.abstract |
The
target of this research work was to establish a surface integrity
control methodology in ultra precision grinding for piezoelectric materials, taking
into account the interaction between the material removal manner and the
machine
design contributions.
Whilst there are
many respective research works concerning the
microscopic material removal behavior on brittle materials and the design
characterization of individual machine components, it was necessary to identify
the
design characteristics in order to ensure a consistent and fine surface
integrity ( i.e. surface roughness, surface atness, textural damage ) in contact
machining.
For
example, in a thermal analysis of a machine structure, the
considerable inuences of internal and external heat sources were observed,
which resulted in heat ows in aerostatic and hydrostatic components. After
identifying several thermal error modes, a substantial improvement of thermal
stability was applied successfully onto the machine structure. However, the
major contributions arising from this research work are considered to be the
following.
( i ) Suggestion of a method to achieve optimized grinding conditions for
piezoelectric materials
( ii ) Identification of a link between material removal behavior and the
machine
design contribution (iii)Development of a novel tooling component
Following a static and dynamic assessment of three grinding machine
structures, it was conciuded that an enhanced damping performance at the loop
distance, between the grinding wheel and work tooling, is beneficial to obtain a
fine surface finish
together with a at surface, whereas past researchers have
claimed that static stiffness and
high resonant frequencies should be the prime
aim. |
en_UK |