ÿþ <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title>PRESS CAPACITY CALCULATIONS---Higrade(Qingdao) Moulds & Products Co., Ltd. China stamping die,higrade stamping die|China press die ÿChina progressive company/manufacture/supplier,China sheet metal parts</title> <meta name="keywords" content="PRESS CAPACITY CALCULATIONS,China stamping die |China press die ÿChina progressive company ÿmanufacture,supplier,China sheet metal parts"> <meta name="description" content="Located in Qingdao, China, Higrade Stamping specializes in stamping die, progressive die, sheet metal parts, including stainless steel/iron stamping parts, Galvanized sheet stamped parts,and so on.Excellent stamping die manufacturer, supplier."> <link href="../css.css" rel="stylesheet" type="text/css"> <script> function autoResize() { try { document.all["test"].style.height=test.document.body.scrollHeight document.all["testbottom"].style.height=testbottom.document.body.scrollHeight document.all["testtop"].style.height=testtop.document.body.scrollHeight } catch(e){} } </script> </head> <body bgcolor="#FFFFFF" leftmargin="0" topmargin="0" marginwidth="0" marginheight="0"> <!-- ImageReady Slices (-1) --> <table width="1003" border="0" align="center" cellpadding="0" cellspacing="0" id="__"> <tr> <td colspan="2"><iframe id=testtop style="height:expression(1); aho:expression(autoResize())" src="../top1.asp" scrolling="no" frameborder="0" width="100%"></iframe></td> </tr> <tr> <td width="260" valign="top" background="../images/index_06.jpg" bgcolor="#FAFAFA" style="background-position:top; background-repeat:repeat-x;"><iframe id=test style="height:expression(1); aho:expression(autoResize())" src="../left2.asp" scrolling="no" frameborder="0" width="260"></iframe></td> <td align="center" valign="top" background="../images/index_07.jpg" bgcolor="#FFFFFF" style="background-position:top; background-repeat:repeat-x;"><table width="660" border="0" align="center" cellpadding="0" cellspacing="0"> <tr> <td height="30"></td> </tr> <tr> <td height="35" background="../images/title.gif" style="background-repeat:no-repeat;"><table width="560" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="44"></td> <td width="328" height="30" valign="top" class="STYLE9-2"><div align="left">News Center</div></td> <td width="188"></td> </tr> </table></td> </tr> <tr> <td height="10" class="STYLE6"></td> </tr> <tr> <td class="STYLE6"><table width="100%" border="0" align="center" cellpadding="0" cellspacing="0" class="STYLE3_5"> <tr> <td height="35"><div align="center"><strong>PRESS CAPACITY CALCULATIONS</strong></div></td> </tr> <tr> <td><div align="center"> <table width="90%" border="0" cellspacing="0" cellpadding="0"> <tr> <td class="STYLE6"><DIV align=center> <TABLE cellPadding=0 width="102%" border=0> <TBODY> <TR> <TD width="100%"> <DIV>BLANKING </DIV> <DIV align=center> <TABLE cellPadding=0 width="28%" border=0> <TBODY> <TR> <TD width="100%"> <DIV></DIV></TD></TR></TBODY></TABLE></DIV> <DIV>Where F(b) = Blanking force (kN), P = Perimeter of blank (mm), S(s) = Shear strength (MPa), c = a constant for impact loadings.</DIV> <DIV>Grinding a shear angle on a punch minimises the shock load on a press and gives a quieter punch operation. For zero shear, when s = 0, c = 1.25. For part shear, when s = 0.3t, c = 1.0. For full shear, when s = t, c = 0.75. (NB: on a small diameter, multi-punch set-up, staggering the length of punches gives a similar effect on shock loads.) e.g. 150mm diameter blank in 3mm mild steel with part shear on punch gives:</DIV> <DIV align=center> <TABLE cellPadding=0 width="54%" border=0> <TBODY> <TR> <TD width="100%"> <DIV></DIV> <DIV>&nbsp;</DIV></TD></TR></TBODY></TABLE></DIV> <DIV></DIV></TD></TR></TBODY></TABLE></DIV> <DIV>&nbsp;</DIV> <DIV align=center> <TABLE cellPadding=0 width="102%" border=0> <TBODY> <TR> <TD vAlign=top width="100%"> <DIV>DRAWING </DIV> <DIV align=center> <TABLE cellPadding=0 width="17%" border=0> <TBODY> <TR> <TD width="100%"> <DIV></DIV></TD></TR></TBODY></TABLE></DIV> <DIV>&nbsp;</DIV> <DIV align=center> <TABLE cellPadding=0 width="100%" border=0> <TBODY> <TR> <TD width="72%"> <DIV>Where F(d) = Drawing force (kN), P = Perimeter of draw (mm), S(y) = Yield strength (MPa), b = a constant for non-draw areas, d = a factor to be used when using a die cushion.</DIV></TD> <TD width="28%"> <DIV></DIV></TD></TR></TBODY></TABLE></DIV> <DIV>When drawing circles, b = 1.0. When drawing irregular forms, corners are non-draw areas and b should be reduced by 0.1 for each corner where the radius is less than 0.3 times the length of the shortest adjacent side. e.g. 150 x 50 pan with 10mm radius corners in 1.6mm mild steel.</DIV> <DIV align=center> <TABLE cellPadding=0 width="86%" border=0> <TBODY> <TR> <TD width="99%"> <DIV></DIV> <DIV>&nbsp;</DIV> <DIV>&nbsp;</DIV> <TABLE cellPadding=0 width="100%" border=0> <TBODY> <TR> <TD> <DIV>news title</DIV></TD> <TD> <DIV>creatime </DIV></TD></TR></TBODY></TABLE> <DIV>&nbsp;</DIV> <DIV align=center> <TABLE cellSpacing=0 cellPadding=0 width="100%" border=0> <TBODY> <TR> <TD> <DIV align=center> <TABLE cellSpacing=0 cellPadding=0 width="90%" border=0> <TBODY> <TR> <TD> <TABLE cellPadding=0 width="100%" border=0> <TBODY> <TR> <TD> <DIV>&nbsp;</DIV></TD> <TD width=18> <DIV>&nbsp;</DIV></TD></TR> <TR> <TD> <DIV><A href="http://www.higradestamping.com/news/newsen57.htm" target=_blank>Hot stamping </A></DIV></TD> <TD width="33%"> <DIV>2009-11-17</DIV></TD></TR> <TR> <TD> <DIV><A href="http://www.higradestamping.com/news/newsen55.htm" target=_blank>Analyse of the die s accuracy </A></DIV></TD> <TD width="33%"> <DIV>2009-11-10</DIV></TD></TR> <TR> <TD> <DIV><A href="http://www.higradestamping.com/news/newsen54.htm" target=_blank>Heat treating of steel</A></DIV></TD> <TD width="33%"> <DIV>2009-11-3</DIV></TD></TR></TBODY></TABLE> <DIV></DIV></TD></TR></TBODY></TABLE></DIV> <DIV></DIV></TD></TR></TBODY></TABLE></DIV> <DIV>&nbsp;</DIV> <DIV>&nbsp;</DIV></TD></TR></TBODY></TABLE></DIV><A name=Calculation></A> <DIV></DIV></TD></TR></TBODY></TABLE></DIV></td> </tr> </table> </div></td> </tr> <tr> <td><div align="center"> <table width="100%" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="75%" height="35" align="left"><div align="center">Author:</div></td> <td align="center"><div align="center">Time:2010-1-19</div></td> </tr> </table> </div></td> </tr> </table></td> </tr> <tr> <td>&nbsp;</td> </tr> </table></td> </tr> </table> <table width="1003" border="0" align="center" cellpadding="0" cellspacing="0"> <tr> <td>&nbsp;</td> </tr> <tr> <td bgcolor="#1B80B4"><iframe id=testbottom style="height:expression(1); aho:expression(autoResize())" src="../bottom1.asp" scrolling="no" frameborder="0" width="100%"></iframe></td> </tr> <tr> <td>&nbsp;</td> </tr> </table> <!-- End ImageReady Slices --> <script type="text/javascript"> var gaJsHost = (("https:" == document.location.protocol) ? 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