Maideen, Normariah Che
(2010)
Design And Analysis Of Mechanical Mating Interfaces For Reconfigurable Machine Tools.
Masters thesis, Universiti Sains Malaysia.
Abstract
Reconfigurable Machine Tools (RMTs) which are designed under
modularity concept are a new approach in machine tools technology which is
characterized by customized flexibility to serve current production requirements. It
allows changes in machine physical configuration whenever required. This concept
of machine tools is still under development stage. Even though there are numbers of
design methodologies proposed, there is no method specifically mentioned on how
each module would be assembled together. Using a structured design approach, the
newly design of mechanical mating interface method is proposed. Two non-vertex
cones with pin-slot arrangement were found to be the best concept. Using Finite
Element Method (FEM), the detail design on the optimum design variables was
determined. The stiffer assembly was assured when the ratio of depth of penetration
to the total mating interface thickness used is 0.6. The 1/10 tapered angle was the
best value for the cones and 0.15 mm of the face clearance between mating
interfaces ensured 5μm of interference fit. Using simulation modelling, the
performance of the newly designed mating interface was investigated and compared
with conventional interface method. The newly designed mating interfaces were
confirmed to perform better compared to conventional method. Finally, the tolerance
analysis was conducted and appropriate tolerance values were allocated. The
intended interference fit of the assembled modules was achieved.
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