Author(s)

Xia Huang

Corresponding Author

Xia Huang

Abstract

The roundness error refers to the variation of the ideal circle on the section perpendicular to the axis of the rotary body. The magnitude of the error value is directly related to the rotation precision of the hole shaft fit, the centering accuracy, and the reliability of the fastening connection. Roundness error is one of the important indexes for evaluating the shape accuracy of rotary parts. It is usually measured by a roundness meter. The national standard (GB/T 7235) specifies four roundness error assessment methods, namely least squares (LSC), minimum circumscribed circle (MCC) and maximum inscribed circle (MIC), and minimum area method (MZC). In the recently published standard of the International Organization for Standardization (ISO), the Geometric Product Specification (GPS), a new roundness error assessment method, the Chebyshev fitting method, has been added. Studying various roundness error evaluation algorithms and developing corresponding software is the primary task of automatic measurement of roundness error, which is very important for the design and modification of roundness instrument.

Keywords

Software Design, Roundness Error Evaluation Algorithm