几何产品规范(GPS)—铸造件的尺寸和几何公差—第3部分：使用±指示尺寸公差的铸件的一般尺寸和几何公差及加工余量

[中文适用范围]： 本标准规定了一般尺寸和几何公差以及使用±指示尺寸公差的铸件加工余量等级。适用于所有铸造金属及其合金的各种铸造工艺生产的铸件的尺寸和几何形状公差。 [外文原描述]： This document specifies general dimensional and geometrical tolerances as well as machining allowance grades for castings using ± tolerances for indicated dimensions as delivered to the purchaser according to ISO/TS 8062-2. It is applicable for tolerancing of dimensions and geometry of castings in all cast metals and their alloys produced by various casting manufacturing processes. This document does not apply to 3D CAD models used without indicated dimensions. This document applies to both general dimensional and general geometrical tolerances (referred to in or near the title block of the drawing), unless otherwise specified and where specifically referred to on the drawing by one of the references in Clause 11. The dimensional tolerances covered by this document are tolerances for linear dimensions. The geometrical tolerances covered by this document are tolerances for: — straightness; — flatness; — roundness; — parallelism; — perpendicularity; — symmetry; — coaxiality. This document does not cover other position tolerances, angular dimensional tolerances or cylindricity tolerances. This document can be used for the selection of tolerance values for individual indications.