表面粗糙度(原称表面光洁度)是反映零件表面上微观几何形状误差的一个重要指标,是度量表面质量的主要依据。表面粗糙度的大小,对零件表面的摩擦磨损、疲劳强度、接触刚度、耐腐蚀性、配合性能、机器的工作精度等都有很大影响,直接影响机器的使用性能和使用寿命。关于表面粗糙度的基本概念、评定基准、评定参数、评定参数的选用等方面,已有详细的论述,本文就设计工作中如何合理选择表面粗糙度谈一些看法。一、表面粗糙度的选择方法零件表面粗糙度的合理选择,是一项重要的技术 Surface roughness (formerly known as the surface finish) is an important indicator of microscopic geometry errors reflected on the part surface, which is the main basis for measuring the surface quality. The size of the surface roughness of the parts surface friction and wear, fatigue strength, contact stiffness, corrosion resistance, with the performance, the accuracy of the machine has a great impact, the direct impact on machine performance and service life. In terms of the basic concepts of surface roughness, evaluation criteria, evaluation parameters, the selection of evaluation parameters and so on, it has been discussed in detail in this paper that how to reasonably choose the surface roughness in the design work to talk about some opinions. First, the choice of surface roughness Part surface roughness is a reasonable choice, is an important technology