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      <title>Unbend/Rebend limitations</title>
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      <div class="title_topic3" id="xps10_pagetitle">Unbend/Rebend limitations</div>
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               <p class="para_td"><a class="links" href="javascript:void(0)" onclick="top.openFile('sheetmetaldes/unbend.html');return(false);">Unbend/Rebend</a></p>
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               <p class="para_td"><a class="links" href="javascript:void(0)" onclick="top.openFile('sheetmetaldes/unbend_dialog.html');return(false);">Options</a></p>
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               <p class="para_td"><a class="links" href="javascript:void(0)" onclick="top.openFile('sheetmetaldes/build_multi_parts.html');return(false);">Related Topics</a></p>
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      </table><br><p class="para_topic">There are several limitations of the <b class="uiTerm">Unbend/Rebend</b> feature that may make this forming method less desirable than the <b class="uiTerm">Self&ndash;Forming</b> feature method.
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            <p class="para_item">At this time there are no <b class="uiTerm">Part in Process</b> states (including <b class="uiTerm">Formed</b> and <b class="uiTerm">Unformed</b> states) for the <b class="uiTerm">Forming Operation</b> method. If you want to unform a part, you will need to unform each feature separately.
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            <p class="para_item">There is no convenient method for eliminating unnecessary <b class="uiTerm">Unbend/Rebend</b> features.
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            <p class="para_item">If you apply an <b class="uiTerm">Unbend</b> feature to a <b class="uiTerm">Self&ndash;Forming</b> feature ( flange), that feature is converted to a non&ndash;self&ndash;forming feature and must be interactively changed back to <b class="uiTerm">Self&ndash;Forming</b> if you want to revert to <b class="uiTerm">Self&ndash;Forming</b> methods.
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            <p class="para_item">All dependent <b class="uiTerm">Self&ndash;Forming</b> features are converted to non&ndash;self&ndash;forming features when you apply an <b class="uiTerm">Unbend</b> feature to a bend region. The exception to this automatic conversion is the general flange and bridge. If <b class="uiTerm">Unbend</b> detects a dependent general flange or bridge, it will not unbend the region.
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            <p class="para_item">If you apply an <b class="uiTerm">Unbend</b> feature to a bend region with a dependent, solid punch, the solid punch will convert to a non&ndash;self&ndash;forming feature.
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            <p class="para_item">If you create a flange, inset flange, or bend, apply an <b class="uiTerm">Unbend</b> and add a feature such a hole to the flange and then create a <b class="uiTerm">Rebend</b>, the editing of the flange or the hole may not be possible later without editing the rebend. If the edit of the flange or hole causes the hole to change which faces of the flange the hole crosses, the edit may fail. For example, when the hole lies entirely on the bend face of the flange, the edit causes the hole to be on the bend face and the web face of the flange, the edit may fail.
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            <p class="para_item">There is no <b class="uiTerm">Forming Operation</b> feature for unbending/rebending <b class="uiTerm">Machinery Corners</b>.
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