[原创]拉深模凹模,凸模圆角半径如何确定?对拉深工序和拉深系数有何影响!

华哥

加分题,回答正确加分,灌水请远离,

金属男孩

<P>对拉深一无所知,请问华哥及各位前辈,什么是拉伸率?拉伸率是拉伸第一步和第二步的直径比吗?那么拉深的第一步如何确定其上下模R及拉伸高度?谢谢!</P>

华哥

<DIV class=quote><B>以下是引用<I>keller666</I>在2005-2-26 22:30:25的发言：</B>

<P>是料厚吗？</P></DIV>

是的，也有用S的。

华哥

<P>料厚也有用δ表示的，不过要看个人习惯．</P>

lvzh11

<P>拉深率就是拉深系数,是拉深比的倒数,</P><P>拉深系数是指拉深后圆筒形件的直径与拉深前毛坯(或半成品)的直径之比。</P><P>极限拉深系数与材料的材质、厚度、模具间隙、拉深条件有关。</P><P>生产上考虑一定条件后用实验的方法得出了极限拉深系数的范围，根据此数据可得出第一次拉深的直径，根据直径得出高度。</P><P>凸凹模的R角如二楼所述！</P>

yhlhg

<P>请 问 拉伸模在拉完后接着要修边( 在同一套模具上) </P><P>那么这R角又该怎么定为好能 模具的凹模和凸模间隙又要怎么放呢?</P><P> 第一,要求不能有毛刺.</P><P>第二,不能有向外翘的边.</P>

lvzh11

<P>拉伸模在拉完后接着要修边( 在同一套模具上),是同一工序吗?</P><P>不同工序在同一模具上到做过,如是同一工序,功能上有点困难!</P>

华哥

<DIV class=quote><B>以下是引用<I>lvzh11</I>在2005-3-12 16:55:19的发言：</B>

<P>拉深率就是拉深系数,是拉深比的倒数,</P>
<P>拉深系数是指拉深后圆筒形件的直径与拉深前毛坯(或半成品)的直径之比。</P>
<P>极限拉深系数与材料的材质、厚度、模具间隙、拉深条件有关。</P>
<P>生产上考虑一定条件后用实验的方法得出了极限拉深系数的范围，根据此数据可得出第一次拉深的直径，根据直径得出高度。</P>
<P>凸凹模的R角如二楼所述！</P></DIV>

我习惯用假设法得出几个近似的拉深系数，再同理论的拉深系数作个比较，挑个较为接近的作首拉系数，那么接下来的事就好办了。当然直筒件就不必这么麻烦。

日月士心王

<p><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-fareast-language: ZH-CN; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;">在保证工件质量的前提下凹模圆角半径尽量取大值，经验公式为rd=0.8sqrt((D-d)t)</span></p><p><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: 'Times New Roman'; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 'Times New Roman'; mso-font-kerning: 1.0pt; mso-fareast-language: ZH-CN; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;">sqrt为开根号之意。<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><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: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">：毛坯直径或上道工序拉深件直径（</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><font face="Times New Roman">mm</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><font face="Times New Roman"><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp; </span>d</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">：本道拉深后的直径（</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><font face="Times New Roman">mm</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-fareast-language: ZH-CN; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;">首次拉深的</span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-fareast-language: ZH-CN; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;">r</span><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-fareast-language: ZH-CN; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;">d</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-fareast-language: ZH-CN; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;">可按表选取</span></span></p><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-fareast-language: ZH-CN; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;"><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">后续各次拉深时</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><font face="Times New Roman">rd</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">应逐步减小，其值可按</span><span lang="EN-US"><shapetype id="_x0000_t75" stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" opreferrelative="t" ospt="75" coordsize="21600,21600"><font face="Times New Roman"> rdn=0.6-0.8rd(n-1)<stroke joinstyle="miter"></stroke><formulas><f eqn="if lineDrawn pixelLineWidth 0"></f><f eqn="sum @0 1 0"></f><f eqn="sum 0 0 @1"></f><f eqn="prod @2 1 2"></f><f eqn="prod @3 21600 pixelWidth"></f><f eqn="prod @3 21600 pixelHeight"></f><f eqn="sum @0 0 1"></f><f eqn="prod @6 1 2"></f><f eqn="prod @7 21600 pixelWidth"></f><f eqn="sum @8 21600 0"></f><f eqn="prod @7 21600 pixelHeight"></f><f eqn="sum @10 21600 0"></f></formulas><path gradientshapeok="t"></path><lock aspectratio="t" vext="edit"></lock></font></shapetype></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">确定，但应≥</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><font face="Times New Roman">2t</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">。若其值</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><font face="Times New Roman">&lt;2t</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">，一般很难拉出，只能靠拉深后整形得到所需零件。</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><p></p></span></p></span></span><span lang="EN-US" style="FONT-SIZE: 12pt;"><p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;"></span><span lang="EN-US" style="FONT-SIZE: 12pt;"><p></p></span></p></p></span></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><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: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">：毛坯直径或上道工序拉深件直径（</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><font face="Times New Roman">mm</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><font face="Times New Roman"><span style="mso-spacerun: yes;">&nbsp;&nbsp;&nbsp; </span>d</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">：本道拉深后的直径（</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><font face="Times New Roman">mm</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">）</span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-fareast-language: ZH-CN; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;">首次拉深的</span><span lang="EN-US" style="FONT-SIZE: 12pt; FONT-FAMILY: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-fareast-language: ZH-CN; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;">r</span><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-fareast-language: ZH-CN; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;">d</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-fareast-language: ZH-CN; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;">可按表选取</span></span></p><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;; mso-bidi-font-family: &quot;Times New Roman&quot;; mso-font-kerning: 1.0pt; mso-fareast-language: ZH-CN; mso-ansi-language: EN-US; mso-bidi-language: AR-SA;"><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">后续各次拉深时</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><font face="Times New Roman">rd</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">应逐步减小，其值可按</span><span lang="EN-US"><shapetype id="_x0000_t75" stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" opreferrelative="t" ospt="75" coordsize="21600,21600"><font face="Times New Roman"> rdn=0.6-0.8rd(n-1)<stroke joinstyle="miter"></stroke><formulas><f eqn="if lineDrawn pixelLineWidth 0"></f><f eqn="sum @0 1 0"></f><f eqn="sum 0 0 @1"></f><f eqn="prod @2 1 2"></f><f eqn="prod @3 21600 pixelWidth"></f><f eqn="prod @3 21600 pixelHeight"></f><f eqn="sum @0 0 1"></f><f eqn="prod @6 1 2"></f><f eqn="prod @7 21600 pixelWidth"></f><f eqn="sum @8 21600 0"></f><f eqn="prod @7 21600 pixelHeight"></f><f eqn="sum @10 21600 0"></f></formulas><path gradientshapeok="t"></path><lock aspectratio="t" vext="edit"></lock></font></shapetype></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">确定，但应≥</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><font face="Times New Roman">2t</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">。若其值</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><font face="Times New Roman">&lt;2t</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">，一般很难拉出，只能靠拉深后整形得到所需零件。</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><p></p></span></p></span></span><span lang="EN-US" style="FONT-SIZE: 12pt;"><p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;"></span><span lang="EN-US" style="FONT-SIZE: 12pt;"><p></p></span></p></p></span>

[此贴子已经被作者于2006-7-13 9:59:02编辑过]

日月士心王

<p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">一般首次拉深时凸模的圆角半径为</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><shapetype id="_x0000_t75" stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" opreferrelative="t" ospt="75" coordsize="21600,21600"><font face="Times New Roman"> rp=0.7-1.0rd<stroke joinstyle="miter"></stroke><formulas><f eqn="if lineDrawn pixelLineWidth 0"></f><f eqn="sum @0 1 0"></f><f eqn="sum 0 0 @1"></f><f eqn="prod @2 1 2"></f><f eqn="prod @3 21600 pixelWidth"></f><f eqn="prod @3 21600 pixelHeight"></f><f eqn="sum @0 0 1"></f><f eqn="prod @6 1 2"></f><f eqn="prod @7 21600 pixelWidth"></f><f eqn="sum @8 21600 0"></f><f eqn="prod @7 21600 pixelHeight"></f><f eqn="sum @10 21600 0"></f></formulas><path gradientshapeok="t"></path><lock aspectratio="t" vext="edit"></lock></font></shapetype><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt;"><font face="Times New Roman"><span lang="EN-US" style="FONT-SIZE: 14pt;"><span style="mso-spacerun: yes;">&nbsp;&nbsp; </span></span><span lang="EN-US" style="FONT-SIZE: 12pt;"><span style="mso-spacerun: yes;">&nbsp;</span></span></font><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">以后各次的</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><font face="Times New Roman">rp</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">可取为各次拉深中直径减小量的一半，最</span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">后一次拉深时</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><font face="Times New Roman">rp</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">应等于零件的内圆角半径值，但</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><font face="Times New Roman">rp</font></span><span style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">不得小于料厚，如必须获得较小的圆角半径时，拉深结束后加一道整形工序，以得到</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><font face="Times New Roman">r</font></span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">零件</span><span lang="EN-US" style="FONT-SIZE: 12pt;"><p></p></span></p>

日月士心王

粗定圆角之后，在用成型分析软件Dynaform分析模拟一下（或其他分析软件），看看效果如何，不佳则该。改到好为止。这是我的见解，哈哈该不该加分啊，华哥！

日月士心王

<p>至于影响么：</p><p>凹模圆角半径过小，则材料沿圆角部分流动时阻力增加，引起拉深力加大，故极限拉深系数应取较大值。</p><p>凸模圆角半径过小，毛坯在此处的弯曲变形程度增加，危险断面强度过多的被削弱，故极限拉深系数应取较大值</p>

Danyoud

圆筒形第一产供销拉伸:凹模R=8--12T,凸模R=5--8T为宜.