加工誤差的影响因素在工艺过程中表現得极为复杂,通常以其原因和结果,可分为系统誤差和偶然誤差(随机誤差)。在順序加工中,誤差的大小和方向始終保持不变,称为常值系统誤差。誤差按照某一較为明显的規律逐漸变化,称为变值系统誤差。誤差的大小和方向以不規則地变化,称为偶然誤 The influencing factors of machining errors are extremely complex during the process. Generally, systematic errors and accidental errors (random errors) can be divided into the causes and the results. In the order of processing, the size of the error and the direction remains unchanged, known as the constant system error. Error in accordance with a more obvious law of gradual change, known as the variable system error. The size and direction of the errors vary irregularly and are called accidental errors