技术交流 › 铸造论坛 › 压铸模铸造-零件的表面粗糙度

HEATS 发表于 2010-9-12 19:16:16

压铸模铸造-零件的表面粗糙度

<P>模具结构零件表面粗糙度直接影响到各机构的正常工作和模具使用寿命。成形零件的表面粗糙度以及加工后遗留的加工痕迹及方向，直接影响到铸件表面质量，脱模的难易，甚至是导致成形零件表面产生裂纹的起源。表面粗糙也是产生金属粘附的原因之我。因此，压铸模具型腔、型芯的零件表面粗糙度应在<SPAN lang=EN-US>R<SUB>a</SUB>0.4μm～0.100μm，其抛光的方向应与铸件脱模方向一致，不允许存有凹陷、沟槽、划伤等缺陷。导滑部位（如推杆与推杆孔、导柱与导套孔、滑块与滑块槽等）的表面质量表，往往会使零件过早磨损或产生咬合。</SPAN></P>
<P><SPAN lang=EN-US><BR>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;各零件工作部位的表面粗糙度，可参照表<SPAN lang=EN-US>14选用。<BR></P></SPAN>
<DIV align=center><SPAN class=blk14>表<SPAN lang=EN-US>14 各种结构件工作部位推荐的表面粗糙度</SPAN></SPAN><BR></DIV>
<DIV align=center>
<TABLE class=table1 borderColor=#b5dba2 cellSpacing=0 cellPadding=0 width="77%" border=1>
<TBODY>
<TR>
<TD class=Normal colSpan=2 rowSpan=2>
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">分&nbsp;类<BR></SPAN></P></TD>
<TD class=Normal width="36%" rowSpan=2>
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">工作部位<BR></SPAN></P></TD>
<TD class=Normal colSpan=7>
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">表 面 粗 糙 度<BR></SPAN></P></TD></TR>
<TR>
<TD class=Normal width="6%">
<P style="TEXT-ALIGN: center" align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">6.3<BR></SPAN></P></TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">3.2<BR></SPAN></P></TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">1.6<BR></SPAN></P></TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">0.80<BR></SPAN></P></TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">0.40<BR></SPAN></P></TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">0.20<BR></SPAN></P></TD>
<TD class=Normal width="10%">
<P style="TEXT-ALIGN: center" align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">0.100<BR></SPAN></P></TD></TR>
<TR>
<TD class=Normal vAlign=top colSpan=2>
<P align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">成形表面<BR></SPAN></P></TD>
<TD class=Normal width="36%">
<P align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">型腔和型芯<BR></SPAN></P></TD>
<TD class=Normal width="6%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="10%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD></TR>
<TR>
<TD class=Normal vAlign=top colSpan=2>
<P align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">受金属液冲刷的表面<BR></SPAN></P></TD>
<TD class=Normal width="36%">
<P align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">内浇口附近的型腔、型芯、内浇口及溢流槽流入口<BR></SPAN></P></TD>
<TD class=Normal width="6%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="10%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD></TR>
<TR>
<TD class=Normal vAlign=top colSpan=2>
<P align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">浇注系统表面<BR></SPAN></P></TD>
<TD class=Normal width="36%">
<P align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">直浇道、横浇道、溢流槽<BR></SPAN></P></TD>
<TD class=Normal width="6%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="10%">&nbsp;</TD></TR>
<TR>
<TD class=Normal vAlign=top colSpan=2>
<P align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">&nbsp; 安装面<BR></SPAN></P></TD>
<TD class=Normal width="36%">
<P align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">动模和定模座板，模脚与压铸机的安装面<BR></SPAN></P></TD>
<TD class=Normal width="6%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="10%">&nbsp;</TD></TR>
<TR>
<TD class=Normal vAlign=top colSpan=2>
<P align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">受压力较大的摩擦接触的滑动表面<BR></SPAN></P></TD>
<TD class=Normal width="36%">
<P align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">分型面，滑块楔紧面<BR></SPAN></P></TD>
<TD class=Normal width="6%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="10%">&nbsp;</TD></TR>
<TR>
<TD class=Normal vAlign=top width="8%" rowSpan=2>
<P align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">导向部位表面<BR></SPAN></P></TD>
<TD class=Normal width="5%">
<P align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">轴<BR></SPAN></P></TD>
<TD class=Normal width="36%" rowSpan=2>
<P align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">导柱、导套和斜销的导滑面<BR></SPAN></P></TD>
<TD class=Normal width="6%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="10%">&nbsp;</TD></TR>
<TR>
<TD class=Normal width="5%">
<P align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">孔<BR></SPAN></P></TD>
<TD class=Normal width="6%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="10%">&nbsp;</TD></TR>
<TR>
<TD class=Normal vAlign=top width="8%" rowSpan=2>
<P align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">与金属液不接触的滑动件表面<BR></SPAN></P></TD>
<TD class=Normal width="5%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">轴<BR></SPAN></P></TD>
<TD class=Normal width="36%" rowSpan=2>
<P align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">复位杆与孔的配合面，滑块、斜滑块传动机构的滑动表面<BR></SPAN></P></TD>
<TD class=Normal width="6%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="10%">&nbsp;</TD></TR>
<TR>
<TD class=Normal width="5%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">孔<BR></SPAN></P></TD>
<TD class=Normal width="6%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="10%">&nbsp;</TD></TR>
<TR>
<TD class=Normal vAlign=top width="8%" rowSpan=2>
<P align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">与金属液接触的滑动件表面<BR></SPAN></P></TD>
<TD class=Normal width="5%">
<P align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">轴<BR></SPAN></P></TD>
<TD class=Normal width="36%" rowSpan=2>
<P align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">推杆与孔的表面，卸料板镶块及型芯滑动面滑块的密封面等<BR></SPAN></P></TD>
<TD class=Normal width="6%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">△<BR></SPAN></P></TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="10%">&nbsp;</TD></TR>
<TR>
<TD class=Normal width="5%">
<P align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">孔<BR></SPAN></P></TD>
<TD class=Normal width="6%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">△<BR></SPAN></P></TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="10%">&nbsp;</TD></TR>
<TR>
<TD class=Normal vAlign=top width="8%" rowSpan=2>
<P align=center><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">固定配合表面<BR></SPAN></P></TD>
<TD class=Normal width="5%">
<P align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">轴<BR></SPAN></P></TD>
<TD class=Normal width="36%" rowSpan=2>
<P align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">导柱和导套，型芯和镶块，斜销和弯销，楔紧块和模套等固定部位<BR></SPAN></P></TD>
<TD class=Normal width="6%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="10%">&nbsp;</TD></TR>
<TR>
<TD class=Normal width="5%">
<P align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">孔<BR></SPAN></P></TD>
<TD class=Normal width="6%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="10%">&nbsp;</TD></TR>
<TR>
<TD class=Normal vAlign=top colSpan=2>
<P><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">组合镶块拼合面<BR></SPAN></P></TD>
<TD class=Normal width="36%">
<P><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">成形镶块的拼合面精度要求较高的固定组合面<BR></SPAN></P></TD>
<TD class=Normal width="6%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="10%">&nbsp;</TD></TR>
<TR>
<TD class=Normal vAlign=top colSpan=2>
<P><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">加工基准面<BR></SPAN></P></TD>
<TD class=Normal width="36%">
<P><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">划线的基准面，加工和测量基准面<BR></SPAN></P></TD>
<TD class=Normal width="6%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="10%">&nbsp;</TD></TR>
<TR>
<TD class=Normal vAlign=top colSpan=2>
<P><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">受压紧力的台阶表面<BR></SPAN></P></TD>
<TD class=Normal width="36%">
<P><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">型芯，镶块的台阶表面<BR></SPAN></P></TD>
<TD class=Normal width="6%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="10%">&nbsp;</TD></TR>
<TR>
<TD class=Normal vAlign=top colSpan=2>
<P><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">不受压紧力的台阶表面<BR></SPAN></P></TD>
<TD class=Normal width="36%">
<P><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">导柱、导套、推杆和复位杆台阶表面<BR></SPAN></P></TD>
<TD class=Normal width="6%">&nbsp;</TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="10%">&nbsp;</TD></TR>
<TR>
<TD class=Normal vAlign=top colSpan=2>
<P><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">排气槽表面<BR></SPAN></P></TD>
<TD class=Normal width="36%">
<P><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">排气槽<BR></SPAN></P></TD>
<TD class=Normal width="6%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="10%">&nbsp;</TD></TR>
<TR>
<TD class=Normal vAlign=top colSpan=2>
<P><SPAN lang=EN-US style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">非配合表面<BR></SPAN></P></TD>
<TD class=Normal width="36%">
<P><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">其它<BR></SPAN></P></TD>
<TD class=Normal width="6%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">
<P style="TEXT-ALIGN: center" align=center><SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">○<BR></SPAN></P></TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="7%">&nbsp;</TD>
<TD class=Normal width="10%">&nbsp;</TD></TR></TBODY></TABLE></DIV>
<P><SPAN class=blk14>&nbsp;&nbsp;&nbsp;&nbsp;<SPAN style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体">注：△符号为异形零件允许选用的表面粗糙度。</SPAN><BR></SPAN></P></SPAN>
               

查看完整版本: 压铸模铸造-零件的表面粗糙度