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A process planning strategy for the HDP process to remove an arbitrary profile is proposed in this study. From this strategy, the possible errors occurred when working at non-axially symmetric or axially-symmetric work surface are analyzed. to evaluate the analytic prediction, a set of experiments will be conducted.
The possible errors are classified into two groups when working at a non-axially symmetric work surface, which are the machining time distribution error and the ripple error. The machining time distribution error only occurs at the boundary of machining area. The machining time distribution error is negligible at the area away from the boundary. On the other hand, the ripple error will be occurred at the whole mahcining area. To reduce the machining time distribution error at the boundary, a strategy that can minimize the maximum error is suggested. When working at an axially symmetric work surface, in addition to the machining time distribution error and ripple error, there may exist another error source caused by the finite revolving period of work table. It is shows that this type of error is little affected by the area of instantaneous macining zone. The error is mainly decided by the ratio between the revolving period and polishing time at specific radius. The higher the ratio is, the less the error will be. A strategy that can both minimize the last type of error and the ripple error is also proposed.
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