刀锋 发表于 2007-4-17 15:44:29

CAD齿轮绘制(gif动画示例)

<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">第一步：在绘制齿轮之前，首先要知道齿轮的模数</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Tahoma">m</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">，齿数</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Tahoma">z</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">，以及相关的计算公式。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Tahoma"><BR></SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">本例绘制齿轮的模数</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Tahoma">m=4mm</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">，齿数</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Tahoma">z=20</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">，相关计算公式如下：</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Tahoma"><BR></SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">分度圆直径</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Tahoma">d=m*z=4*20=80 </SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">齿顶圆直径</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Tahoma">da=m</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">（</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Tahoma">z+2</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">）</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Tahoma">=88<SPAN style="mso-spacerun: yes">&nbsp; </SPAN></SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">齿根圆直径</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Tahoma">df=m</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">（</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Tahoma">z-2.5</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">）</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Tahoma">=70<BR></SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">根据以上计算结果绘制三个圆，并绘制两条夹角为</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Tahoma">9°</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">的直线及</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Tahoma">3</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">条角平分线</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">注意，所绘制角度与齿数的关系为夹角角度</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Tahoma">=360/2z</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Tahoma"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">第二步：选择圆弧命令，绘制三点圆弧</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">第三步：将辅助线删除，裁减掉圆弧多余的部分，并倒圆角</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">第四步：选择阵列命令，将上面绘制好的一个齿以三个圆的圆心为中心阵列</SPAN><SPAN lang=EN-US style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: Tahoma">20</SPAN><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">个</SPAN></P>
<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><SPAN style="FONT-SIZE: 9pt; COLOR: black; FONT-FAMILY: 宋体; mso-ascii-font-family: Tahoma; mso-hansi-font-family: Tahoma; mso-bidi-font-family: Tahoma">最后将多余的线剪掉，画出齿轮内孔及键槽，生成面域，取差集，拉伸，就完成了齿轮的绘制。</SPAN></P>
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zzym490 发表于 2014-4-9 22:59:14

可以画精确地渐开线齿轮吗？

海名威hmu 发表于 2014-4-14 07:39:54

正好学习，
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