机械工程CAD制图规则_机械论文

　　机械工程CAD制图规则
　　 1.范围.....................................................................................................................2
　　 2.引用标准.............................................................................................................2
　　 3.基本原则.............................................................................................................2
　　 4.图线.....................................................................................................................2
　　 4.1图线组别.........................................................................................................2
　　 4.2图线的结构.....................................................................................................3
　　 4.2.1双折线...........................................................................................3
　　 4.2.1.1双折线的尺寸...........................................................................................3
　　 4.2.1.2计算双折线各部分尺寸的公式...............................................................3
　　 4.2.1.3举例...........................................................................................................3
　　 4.2.2虚线（F型线）............................................................................3
　　 4.2.2.1虚线的尺寸...............................................................................................3
　　 4.2.2.2计算虚线各部分尺寸的公式...................................................................4
　　 4.2.2.3举例...........................................................................................................4
　　 4.2.3点画线（G型线、J型线）..........................................................4
　　 4.2.3.1点画线的尺寸...........................................................................................4
　　 4.2.3.2计算点画线各部分尺寸的公式...............................................................4
　　 4.2.3.3举例...........................................................................................................5
　　 4.2.4双点画线（K型线）....................................................................5
　　 4.2.4.1双点画线的尺寸.......................................................................................5
　　 4.2.4.2计算双点画线各部分尺寸的公式...........................................................5
　　 4.2.4.3举例...........................................................................................................5
　　 4.3重合图线的优先顺序.....................................................................................6
　　 4.4非连续线的画法.............................................................................................6
　　 4.4.1相交线...........................................................................................6
　　 4.4.2接触与连接线和转弯线的画法...................................................6
　　 4.5图线颜色.........................................................................................................6
　　 5.字体.....................................................................................................................7
　　 5.1数字.................................................................................................................7
　　 5.2小数点.............................................................................................................7
　　 5.3字母.................................................................................................................7
　　 5.4汉字.................................................................................................................7
　　 5.5标点符号.........................................................................................................7
　　 5.6图纸幅面.........................................................................................................7
　　 5.7字（词）距、行距.........................................................................................7
　　 6.尺寸线的终端形式.............................................................................................8
　　 7.图形符号的表示.................................................................................................8
　　 8.图样中各种线型在计算机中的分层.................................................................8

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