General tolerances-Tolerances for linear and angular dimensions without individual tolerance indications
一般公差 未单独标注公差的线性和角度尺寸公差
发布日期:
1993-11-15
BS EN 22768-1:1993旨在简化
图纸指示,并规定了一般要求
线性和角度尺寸公差
在四种情况下没有单独的公差指示
宽容班。注1:线性公差的一般公差背后的概念
附录A中描述了角度尺寸。BS EN 22768-1:1993适用于以下部件的尺寸:
通过去除金属或形成零件而产生
从金属板。注2:这些公差可能适用于
金属以外的材料。注3:存在或计划采用平行国际标准,
e、 g.铸件见ISO 80621)。BS EN 22768-1:1993仅适用于以下情况:
没有单独标注的维度
公差指示:a)线性尺寸(例如外部尺寸、内部尺寸)
尺寸、步长、直径、半径、距离、,
断裂带的外半径和倒角高度
边缘);b) 角度尺寸,包括角度
通常未标明尺寸,例如右侧
角度(90),除非参考ISO 2768-2
或均匀多边形的角度;c) 线性和角度尺寸由
加工组装件。BS EN 22768-1:1993不适用于以下尺寸:
a) 线性和角度尺寸
参考其他标准中的
一般公差;b) 括号内所示的辅助尺寸;c) 理论上精确的尺寸如图所示
矩形框架。交叉引用:BS EN 22768-2ISO 8015
BS EN 22768-1:1993 is intended to simplify
drawing indications and it specifies general
tolerances for linear and angular dimensions
without individual tolerance indications in four
tolerance classes.NOTE 1 The concepts behind the general tolerancing of linear
and angular dimensions are described in annex A.BS EN 22768-1:1993 applies to the dimensions of parts that are
produced by metal removal or parts that are formed
from sheet metal.NOTE 2 These tolerances may be suitable for use with
materials other than metal.NOTE 3 Parallel International Standards exist or are planned,
e.g. see ISO 80621) for castings.BS EN 22768-1:1993 only applies for the following
dimensions which do not have an individual
tolerance indication:a) linear dimensions (e.g. external sizes, internal
sizes, step sizes, diameters, radii, distances,
external radii and chamfer heights for broken
edges);b) angular dimensions, including angular
dimensions usually not indicated, e.g. right
angles (90), unless reference to ISO 2768-2 is
made, or angles of uniform polygons;c) linear and angular dimensions produced by
machining assembled parts.BS EN 22768-1:1993 does not apply for the following dimensions:a) linear and angular dimensions which are
covered by reference to other standards on
general tolerances;b) auxiliary dimensions indicated in brackets;c) theoretically exact dimensions indicated in
rectangular frames.Cross References:BS EN 22768-2ISO 8015