天天课堂 发表于 2009-8-26 10:23:00

掌握切割实体的方法和技巧

<table cellspacing="0" cellpadding="0"><tbody><tr><td class="t_msgfont" id="postmessage_445">打开文件“14-8.dwg”，如图14-21左图所示。用SLICE命令切割实体，将左图修改为右图。这个练习的目的是使读者掌握切割实体的方法和技巧。<br/><img height="191" alt="" src="http://www.ttketang.com/home/attachment/200908/26/113_1251247951xrx3.jpg" width="402"/><br/>14-8切割实体<br/>1.&nbsp; &nbsp; &nbsp; &nbsp; 打开对象捕捉，设定捕捉方式为：端点、交点。<br/>2.&nbsp; &nbsp; &nbsp; &nbsp; 用xy坐标面切割实体，如图14-22所示。<br/>命令: _slice<br/>选择对象: 找到 1 个&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //选择实体<br/>选择对象:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //按Enter键<br/>指定切面上的第一个点，依照 [对象(O)/XY 平面(XY)/YZ 平面(YZ)/ZX <br/>平面(ZX)/三点(3)] &lt;三点&gt;: xy&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //使用“XY 平面”选项<br/>指定 XY 平面上的点 &lt;0,0,0&gt;: from&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //使用正交偏移捕捉<br/>基点: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //捕捉A点<br/>&lt;偏移&gt;: @0,0,55&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //输入相对坐标<br/>在要保留的一侧指定点或 [保留两侧(B)]: b&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //使用“保留两侧(B)”选项<br/>结果如图14-22所示。<br/><img height="200" alt="" src="http://www.ttketang.com/home/attachment/200908/26/113_1251247942QqNt.png" width="275"/>
                                        <br/>14-22利用xy坐标面切割实体<br/>知识点：SLICE命令可以切开实心体模型，被剖切的实体可保留一半或两半都保留。保留部分将保持原实体的图层和颜色特性。剖切方法是：先定义切割平面，然后选定需要的部分。用户可通过3点定义切割平面，也可指定当前坐标系xy、yz、zx平面作为切割平面。<br/>3.&nbsp; &nbsp; &nbsp; &nbsp; 用zx坐标面切割实体，如图14-23所示。<br/>命令: _slice<br/>选择对象: 找到 1 个&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //选择实体<br/>选择对象:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //按Enter键<br/>指定切面上的第一个点，依照 [对象(O)/XY 平面(XY)/YZ 平面(YZ)/ZX <br/>平面(ZX)/三点(3)] &lt;三点&gt;: zx&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //使用“zx 平面”选项<br/>指定 XY 平面上的点 &lt;0,0,0&gt;: from&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //使用正交偏移捕捉<br/>基点: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //捕捉B点<br/>&lt;偏移&gt;: @0,80,0&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //输入相对坐标<br/>在要保留的一侧指定点或 [保留两侧(B)]: b&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //使用“保留两侧(B)”选项<br/>结果如图14-23所示。<br/><img height="218" alt="" src="http://www.ttketang.com/home/attachment/200908/26/113_12512479440Z8e.png" width="318"/><br/>14-23利用zx坐标面切割实体<br/>4.&nbsp; &nbsp; &nbsp; &nbsp; 建立新坐标系，在xy坐标面内绘制线段CD，如图14-24所示。<br/><img height="218" alt="" src="http://www.ttketang.com/home/attachment/200908/26/113_1251247945Hsqk.png" width="283"/>
                                        <br/>14-24绘制线段CD<br/>5.&nbsp; &nbsp; &nbsp; &nbsp; 利用斜面切割实体，如图14-25左图所示。删除多余实体，然后对其余实体进行“并”运算，结果如图14-25右图所示。<br/>命令: _slice<br/>选择对象: 指定对角点: 找到 4 个&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //选择实体<br/>选择对象:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //按Enter键<br/>指定切面上的第一个点，依照 [对象(O)/XY 平面(XY)/YZ 平面(YZ)/ZX <br/>平面(ZX)/三点(3)] &lt;三点&gt;: 3&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //使用“三点(3)”选项<br/>指定平面上的第一个点: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //捕捉C点，如图14-24所示<br/>指定平面上的第二个点:&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //捕捉D点<br/>指定平面上的第三个点: @0,0,10&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //输入第3点的相对坐标<br/>在要保留的一侧指定点或 [保留两侧(B)]: b&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; //使用“保留两侧(B)”选项<br/>结果如图14-25左图所示。删除多余实体，再对其余实体进行“并”运算，结果如图14-25右图所示。<br/><img height="183" alt="" src="http://www.ttketang.com/home/attachment/200908/26/113_1251247949lmh5.png" width="383"/><br/>14-25用斜面切割实体并进行“并”运算</td></tr></tbody></table>本贴转载于<a href="http://www.ttketang.com/">http://www.ttketang.com/</a>

红色32 发表于 2009-10-7 00:41:00

老套套了，现在都比这个简单
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