Technical Requirements in Detail Drawings (零件图的技术要求)

In order to ensure the performance for part utilization,one should specify desired technical requirements for production and inspection on the detail drawing. Technica lrequirements in a detail drawing include surface texture, dimension tolerances, form and position tolerances, heat treatment and surface treatment, machining and inspection requirements, and other special requirements or remarks. 

为了保证零件的使用性能,必须在零件图中注明零件在制造过程中应该达到的技术要求。图样上技术要求的内容有:表面结构、尺寸公差、形状和位置公差、热处理及表面处理要求、加工及检测要求和其他特殊要求或说明。

Among various technical requirements, surface texture,dimension tolerances, form and position tolerances, heat treatment and surface treatment should be specified in accordance with related technical standards when marking dimensions with relevant code (symbol), letter and word following the standard. For those that cannot be specified by dimensioning, or that are required to be represented uniformly on the drawing, they can be addressed item by item in the blank area at the bottom of the drawing.

技术要求中的表面结构、尺寸公差、形状和位置公差、热处理及表面处理要求,应按照有关技术标准的规定,用指定的代(符)号、字母和文字注在图形上。对无法注在图形上,或需统一说明的内容,可用简明的文字逐项写在图纸下方的空白处。