标题: 【求助】关于曲面“join" [打印本页] 作者: ideas 时间: 2004-12-21 23:53 标题: 【求助】关于曲面“join" 关于里面的选项 federation不知道怎么回事，起到什么效果，希望老大指点
如图作者: 丝丝 时间: 2004-12-22 07:51
顶！我搞不清楚！！作者: ideas 时间: 2004-12-22 21:14
顶，怎么沉拉，都不晓得？8可能啊作者: genuine_wu 时间: 2004-12-28 22:04
我也顶一下！
想了好久也不大清楚其作用如何
纳闷阿作者: cxdwq 时间: 2004-12-28 23:20
顶作者: xuxiaoping 时间: 2004-12-29 13:29
顶 作者: firekylin 时间: 2009-12-10 21:38
我也非常希望搞懂，很难理解！高手们请教！作者: firekylin 时间: 2009-12-10 22:28
总算弄懂了：
其实就是为了在以后（不管是JOINT还是EXTRACT之后），选择那些曲面或曲线会很方便的。比如：在joint了多个元素并用FEDERATION其中几个元素后，则只要选择federation中的其中一个元素，其余的都会选上。看看下面的英文介绍，虽然没有图（抱歉），但是应该能理解。
Federation is grouping elements like surfaces and curves in a Join for easy picking of surfaces/curve later. Federation can be found in “Join” and “Extract” command in CATIA V5 GSD(Generative Shape Design) Workbench. This is useful grouping feature. We shall explain you what is it and how to use it.
Consider a set of simple surfaces as shown in the image below. The Geometrical set consists of 4 surfaces.
Surface 1, Surface 2, Surface 3 and Surface 4 is included in ‘Join.1’. In the Federation tab of join command we have added Surface 4 and Surface 3 as shown in the image below.
Join.1 with ‘F’ is reflected in the Join command icon in the model tree.
For comparison, we have created a simple ‘Join.2’ without Federation. ‘Join.2’ is join of Surface 1, Surface 2, Surface 3 and Surface 4.
‘Extract’ command on ‘Join.2’ gives 4 elements selection (refer image below).
Where as ‘Extract’ on ‘Join.1’ gives only 3 elements. That’s because Join.1 involves Federation of two surfaces. Those two surfaces are grouped together.
This way in a complex geometry you can group several surfaces and involve it in a Federation. Later selecting of those surfaces is very simple and will happen in a single click.
