< class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT color=#000000><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">二.</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">UG</FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">修剪破面</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o:p></o:p></SPAN></FONT></P>' o7 J4 C9 q4 i# a
< class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT color=#000000><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">1.</FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">用</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">Analysis / Examine Geometry </FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">里的</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">Face_ Face Intersections </FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">和</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">Sheet _Boundaries</FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">选项,确定边界的数量,以及破孔的具体位置,或自交面的位置。再分别用线框显示,分析边界线。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><o:p></o:p></SPAN></FONT></P>
$ r4 N8 o) h! J. N2 V0 t< class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT color=#000000><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">采取的措施:</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><o:p></o:p></SPAN></FONT></P>! b- r* \( s8 U1 _! b3 X
< class=MsoNormal style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-list: l0 level1 lfo1; tab-stops: list 18.0pt"><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-fareast-font-family: 'Times New Roman'"><SPAN style="mso-list: Ignore"><FONT face="Times New Roman"><FONT color=#000000>A.<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></FONT></FONT></SPAN></SPAN><FONT color=#000000><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">面减面:</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><o:p></o:p></SPAN></FONT></P>, w9 O3 `- g1 {+ p' z# O. ]
< class=MsoNormal style="MARGIN: 0cm 0cm 0pt 18pt"><FONT color=#000000><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抽取破孔周边面,将其去除参数,然后用布尔运算,面减面的方式,将破孔周边面去掉,再将抽取的面缝合上去(必要时,可将缝合公差稍作调整),也可将抽取的面扩大,或修剪,再缝合。如果布尔运算失败,可将破孔周围的面都做抽取,再布尔运算。后</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">Copy</FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">已经抽取的面,处理破面。再缝合。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><o:p></o:p></SPAN></FONT></P>) _6 k- P- \' N& m. P' P5 M
< class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT color=#000000><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">B. </FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">裁剪片体</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><o:p></o:p></SPAN></FONT></P>
1 [6 B# d! F7 l7 z) N< class=MsoNormal style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: -1.5"><FONT color=#000000><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman"><SPAN style="mso-spacerun: yes"> </SPAN><SPAN style="mso-spacerun: yes"> </SPAN></FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">抽取破面或周边的面作备份。用</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">Trimmed Sheet(</FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">修剪的片体</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">)</FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">选项,剪掉原几何体中的破面或周边的面。再用备份的面,经编辑处理,再恢复上去逐个缝合。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><o:p></o:p></SPAN></FONT></P># N, A. M1 u1 j2 A/ L m
< class=MsoNormal style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: -1.5"><FONT color=#000000><SPAN lang=EN-US style="FONT-SIZE: 12pt"><SPAN style="mso-spacerun: yes"><FONT face="Times New Roman"> </FONT></SPAN></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">如果破面为小孔,可用“自由曲面特征”里的选项,手动做</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">i</FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">片体,补上去。如果缝合后仍有破孔,可将缝合公差稍微调大,待作成实体后,用“替换”或者“约束面”等功能来修整。(实体的修整有时比片体方便很多)</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><o:p></o:p></SPAN></FONT></P>; ^- N4 {( ^" ^% Q; _0 ]/ H" y: S
< class=MsoNormal style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: -1.5"><FONT color=#000000><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">C. </FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">将破掉的面修改成另一种颜色,其余的面颜色作成一致。再用</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">MW/mold tool / Extract Face Region </FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">选项抽取同颜色的面,打开</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">29</FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">层,可看到没有了欲删除的面,这样就很容易修补。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><o:p></o:p></SPAN></FONT></P>, M( e2 D0 r9 C0 P% k4 t5 c
< class=MsoNormal style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: -1.5"><FONT color=#000000><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">D. </FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">有时,由其他软件转过来的</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">IGS</FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">图,曲面已经严重变形,可用轮廓线,手动作面。如有轮廓线断开,可将这些处剪掉,再处理。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><o:p></o:p></SPAN></FONT></P>
' m/ M# `: j9 d<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><FONT color=#000000><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">E. </FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">如果破面很多,可全部抽取成一个个的散面,再逐个缝合,即可发现问题所在。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><o:p></o:p></SPAN></FONT></P>% c5 q: c6 p( T8 ?1 ^
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; mso-char-indent-count: -1.5"><FONT color=#000000><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">F. </FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">有很多从其他</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">3D</FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">软件转过来的</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">STP</FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'">图,分析它为实体,但是仔细观察,却有破洞,这属于几何问题。这时可抽取一个个的单片体,再逐个缝合来解决。也可根据轮廓线,自己手工作面后,再做</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt"><FONT face="Times New Roman">Patch.</FONT></SPAN></FONT></P> |