GB/T 16462.7-2009

This standard specifies the test conditions and evaluation methods for assessing the contouring performance of numerically controlled turning machines and turning centres within coordinate planes. It is applied in the manufacturing industry to verify the machine's ability to accurately follow programmed curved paths, such as circles and arcs, under defined feedrate and axis motion conditions. The standard is used during machine tool acceptance testing, performance verification, and periodic accuracy checks to ensure the machine meets specified contouring accuracy requirements for precision machining.