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HEATS 发表于 2010-9-12 14:49:41

压装

<DIV>    压装时的主要要求为：</DIV>
<DIV>    1）压装时不得损伤零件</DIV>
<DIV>    2）压入时应平稳，被压入件应准确到位。</DIV>
<DIV>    3）压装的轴或套引入端应有适当导锥，但怠锥长度不得大于配合长度的15%，导向斜角一般不应大于10°。</DIV>
<DIV>    4）将实心轴压入盲孔，应在适当部位有排气孔或槽。</DIV>
<DIV>    5）压装零件的配合表面除有特殊要求外，在压装时应涂以清洁的润滑剂。</DIV>
<DIV>    6）用压力机压入时，压入前应根据零件的材料和配合尺寸，计算所需的压入力。压力机的压力一般应为所需压入力的3~3.5倍，压入力的计算方法如下：</DIV>
<DIV> </DIV>
<DIV> </DIV>
<P align=center><IMG src="http://www.chmcw.com/upload/news/RCL/13220_1nf4h2153.jpg" border=0></P>
<DIV>                                                表 58-22  材料摩擦系数</DIV>
<P align=center>
<TABLE style="WIDTH: 515px; HEIGHT: 190px" cellSpacing=0 cellPadding=0 border=1>
<TBODY>
<TR>
<TD>
<DIV align=center>村料</DIV></TD>
<TD>
<DIV align=center>摩擦因数μ（无润滑）</DIV></TD>
<TD>
<DIV align=center>摩擦因数μ（有润滑）</DIV></TD></TR>
<TR>
<TD>
<DIV align=center>钢一钢</DIV></TD>
<TD>
<DIV align=center>0.07~0.16</DIV></TD>
<TD>
<DIV align=center>0.05~0.13</DIV></TD></TR>
<TR>
<TD>
<DIV align=center>钢—铸钢</DIV></TD>
<TD>
<DIV align=center>0.11</DIV></TD>
<TD>
<DIV align=center>0.07</DIV></TD></TR>
<TR>
<TD>
<DIV align=center>钢一结构钢</DIV></TD>
<TD>
<DIV align=center>0.10</DIV></TD>
<TD>
<DIV align=center>0.08</DIV></TD></TR>
<TR>
<TD>
<DIV align=center>钢一优质结构</DIV></TD>
<TD>
<DIV align=center>0.11</DIV></TD>
<TD>
<DIV align=center>0.07</DIV></TD></TR>
<TR>
<TD>
<DIV align=center>钢—青铜</DIV></TD>
<TD>
<DIV align=center>0.15~0.20</DIV></TD>
<TD>
<DIV align=center>0.03~0.06</DIV></TD></TR>
<TR>
<TD>
<DIV align=center>钢—铸铁</DIV></TD>
<TD>
<DIV align=center>0.12~0.15</DIV></TD>
<TD>
<DIV align=center>0.05~0.10</DIV></TD></TR>
<TR>
<TD>
<DIV align=center>铸铁—铸铁</DIV></TD>
<TD>
<DIV align=center>0.15~0.25</DIV></TD>
<TD>
<DIV align=center>0.05~0.10</DIV></TD></TR></TBODY></TABLE></P>
<P align=center><IMG src="http://www.chmcw.com/upload/news/RCL/13220_4e7tnk155.jpg" border=0></P>
<DIV>                              表58-23，常用材料的弹性模量，泊松比和线胀系数</DIV>
<P align=center>
<TABLE style="WIDTH: 535px; HEIGHT: 199px" cellSpacing=0 cellPadding=0 border=1>
<TBODY>
<TR>
<TD rowSpan=2>
<DIV align=center>材料</DIV></TD>
<TD rowSpan=2>
<DIV align=center>弹性模量E/（KN/mm<SUP>2</SUP>）</DIV></TD>
<TD rowSpan=2>
<DIV align=center>泊松比v</DIV></TD>
<TD colSpan=2>
<DIV align=center>线胀系数a/(10<SUP>-6</SUP>/℃</DIV></TD></TR>
<TR>
<TD>
<DIV align=center>加热</DIV></TD>
<TD>
<DIV align=center>冷却</DIV></TD></TR>
<TR>
<TD>
<DIV align=center>碳钢、低合金钢、合金结构钢</DIV></TD>
<TD>
<DIV align=center>200~235</DIV></TD>
<TD>
<DIV align=center>0.30~0.31</DIV></TD>
<TD>
<DIV align=center>11</DIV></TD>
<TD>
<DIV align=center>—8.5</DIV></TD></TR>
<TR>
<TD>
<DIV align=center>灰铸铁（HT150、HT200）</DIV></TD>
<TD>
<DIV align=center>70~80</DIV></TD>
<TD>
<DIV align=center>0.24~0.25</DIV></TD>
<TD>
<DIV align=center>11</DIV></TD>
<TD>
<DIV align=center>—9</DIV></TD></TR>
<TR>
<TD>
<DIV align=center>灰铸铁（HT250、HT300）</DIV></TD>
<TD>
<DIV align=center>105~130</DIV></TD>
<TD>
<DIV align=center>0.24~0.26</DIV></TD>
<TD>
<DIV align=center>10</DIV></TD>
<TD>
<DIV align=center>—8</DIV></TD></TR>
<TR>
<TD>
<DIV align=center>可锻铸铁</DIV></TD>
<TD>
<DIV align=center>90~100</DIV></TD>
<TD>
<DIV align=center>0.25</DIV></TD>
<TD>
<DIV align=center>10</DIV></TD>
<TD>
<DIV align=center>—8</DIV></TD></TR>
<TR>
<TD>
<DIV align=center>非合金球墨铸铁</DIV></TD>
<TD>
<DIV align=center>160~180</DIV></TD>
<TD>
<DIV align=center>0.28~0.29</DIV></TD>
<TD>
<DIV align=center>10</DIV></TD>
<TD>
<DIV align=center>—8</DIV></TD></TR>
<TR>
<TD>
<DIV align=center>青铜</DIV></TD>
<TD>
<DIV align=center>85</DIV></TD>
<TD>
<DIV align=center>0.35</DIV></TD>
<TD>
<DIV align=center>17</DIV></TD>
<TD>
<DIV align=center>—15</DIV></TD></TR>
<TR>
<TD>
<DIV align=center>黄铜</DIV></TD>
<TD>
<DIV align=center>80</DIV></TD>
<TD>
<DIV align=center>0.36~0.37</DIV></TD>
<TD>
<DIV align=center>18</DIV></TD>
<TD>
<DIV align=center>—16</DIV></TD></TR>
<TR>
<TD>
<DIV align=center>铝合金</DIV></TD>
<TD>
<DIV align=center>69</DIV></TD>
<TD>
<DIV align=center>0.32~0.36</DIV></TD>
<TD>
<DIV align=center>21</DIV></TD>
<TD>
<DIV align=center>—20</DIV></TD></TR>
<TR>
<TD>
<DIV align=center>镁铝合金</DIV></TD>
<TD>
<DIV align=center>40</DIV></TD>
<TD>
<DIV align=center>0.25~0.30</DIV></TD>
<TD>
<DIV align=center>25.5</DIV></TD>
<TD>
<DIV align=center>—25</DIV></TD></TR></TBODY></TABLE></P>

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