CAD制图标准(中英文).doc

文档介绍：CAD制图标准(中英文)
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中文标题
CAD制图标准
Chinese Title
英文标题
Standard of CAD drawings
English T线或双点划线有困难时，可用细实线代替。
Center line shall be 2-5mm outside the circle; the start and the end shall be in short continuous line instead of short dashed line; circle center must be the junction of the lines. When dotted thin line or double dotted thin line is too small to be drawn, it may be replaced with continuous thin line.
建议虚线与虚线（或其它图线）相交时，应线段相交；虚线是实线的延长线时，在连接处要离
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开。
Suggest the continuous part cross when dashed lines (or other lines) meet; dashed lines shall be apart from the continuous line when become the extension.
画局部放大图时，应用细实线圈出被放大部分的部位，并用罗马数字顺序地标记。在局部放大图的上方中间标注出相应的罗马数字和采用的比例。
When drawing needs to be partially enlarged, the enlarged part shall be marked out with continuous thin line and digital sequence. And the relevant digital sequence and the scale used shall be marked out on the upper center of the enlarged part.
尺寸标注
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Dimension Label
尺寸标注用细实线绘制，尺寸数字字高与尺寸箭头大小一致：A4：；A3：。
Dimension label is to be made in continuous thin line, the arrow shall be in the same size as the digit height: A4：；A3：。
技术要求
Technical Requirement
技术要求书写采用细实线，字高：A4：；A3：4。
Technical requirement shall be written in continuous thin line, character height: A4：；A3：4.
图中的表格
Forms
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一般情况下，字高与尺寸标注一致。如表格文字太多，可视情况而定。
Usually the character height shall be consistent with the dimension label. But if the text is too much, it may depend.
表面粗糙度
Surface Roughness
代号中数字的方向必须与尺寸数字的方向一致。对其中使用最多的一种代(符)号可以统一标注在图样右上角，并加注“其余”两字，且应比图形上其它代（符）。
Digit in the symbol shall be in the same direction as dimension digit. And the most used symbol may be marked out in the right corner of the drawing, with remark of “Others”, and the size of times larger than other symbols.
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