1.Huazhong University of Science and Technology,Wuhan 430074,China;
2.Hong Kong University of Science and Technology,Clear Water Bay Kowloon,Hong Kong,China
Abstract The problems in the current tolerance system for roundness assessment are examined. It is found that the existing methods for roundness error measurement and assessment are based on the concepts in the geometric tolerance system. In order to solve the problems, a new concept of statistical tolerance of roundness is proposed. The proposed tolerance system is complementary to the existing geometrical roundness tolerance system. A number of roundness assessment functions using the new concept are proposed and the significance is discussed.
