几何形状和位置的公差的标准化和规格化,对机械制造工业有很重要的意义。由于缺乏此种公差数据的标准和文献资料,设计者在选择公差时,往往只根据自己的工作经验加以决定。结果常使零件的制造精度提高到不必要的程度,而浪费人力。 到目前为止,对于几何形状和位置的公差还研究得 The standardization and normalization of tolerances for geometries and locations is of great importance to the machine building industry. Due to the lack of standards and documentation for such tolerance data, designers often make their choice based on their own work experience in selecting tolerances. As a result, the manufacturing precision of parts is often unnecessarily increased, which is labor-intensive. To date, the tolerances on geometry and location have also been studied