Abstract
Tolerance is an important factor that affects product quality, cost and production time. However tolerance design still relies heavily on experience, which cannot satisfy the requirements of advanced manufacturing. In this work, a tolerance pre-inspection approach for a pattern of holes (POH) is proposed. The approach conducts tolerance pre-inspection based on the variational geometry generated with mathematical models of translational and rotational variations in three-diamensional (3D) CAD systems. Using this approach, the effect of POH tolerance design can be explicitly simulated, visualized and inspected in a 3D CAD system at the early design stage. The approach is implemented and some test results are given.
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