焊接 焊接结构的一般公差 长度和角度、形状和位置的尺寸

[中文适用范围]： 本文件根据车间惯用精度，规定了四个公差等级中线性和角度尺寸以及焊接结构形状和位置的一般公差。 选择特定公差等级的主要标准是基于要满足的功能要求。 适用的公差始终是图纸中规定的公差。 可以使用根据本文件的公差等级，而不是指定单独的公差。 本文件中规定的线性和角度尺寸以及形状和位置的一般公差适用于焊件、焊接组件、焊接结构等。 对于复杂结构可能需要特殊规定。 本文件中给出的规范基于 ISO 8015 的独立性原则，根据该原则，尺寸和几何公差彼此独立适用。 如果没有或不充分参考一般公差，则在未单独指示公差的情况下呈现线性和角度尺寸或形状和位置指示的制造文件应被视为不完整。 这不适用于临时尺寸。 [外文原描述]： This document specifies general tolerances for linear and angular dimensions and for shape and position of welded structures in four tolerance classes, based on customary workshop accuracy. The main criterion for selection of a particular tolerance class is based on the functional requirements which are to be met. The applicable tolerances are always those which are stated in the drawing. Instead of specifying individual tolerances the tolerance classes according to this document can be used. General tolerances for linear and angular dimensions and for shape and position as specified in this document apply for weldments, welding assemblies, welded structures, etc. Special provisions can be necessary for complex structures. The specifications given in this document are based on the independency principle of ISO 8015 , according to which the dimensional and geometrical tolerances apply independently of each other. Manufacturing documentation in which linear and angular dimensions or indications for shape and position are presented without individually indicated tolerances shall be deemed incomplete if there is no, or inadequate, reference to general tolerances. This does not apply to temporary dimensions.