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<SPAN class=Apple-style-span style="WORD-SPACING: 0px; FONT: 14px/24px arial, 宋体, sans-serif; TEXT-TRANSFORM: none; COLOR: rgb(0,0,0); TEXT-INDENT: 0px; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); webkit-text-size-adjust: auto; orphans: 2; widows: 2; webkit-text-decorations-in-effect: none; webkit-text-stroke-width: 0px">
<DIV class=para style="MARGIN: 0px; COLOR: rgb(51,51,51); TEXT-INDENT: 0px; LINE-HEIGHT: 24px"><STRONG>一、</STRONG>自由锻的基本工序：自由锻造时，锻件的形状是通过一些基本变形工序将坯料逐步锻成的。自由锻造的基本工序有镦粗、拔长、冲孔、弯曲和切断等。</DIV>
<DIV class=para style="MARGIN: 0px; COLOR: rgb(51,51,51); TEXT-INDENT: 0px; LINE-HEIGHT: 24px">1.镦粗 镦粗是对原坯料沿轴向锻打，使其高度减低、横截面增大的操作过程。这种工序常用于锻造齿轮坯和其他圆盘形类锻件。镦粗分为全部镦粗和局部锻粗两种。</DIV>
<DIV class=para style="MARGIN: 0px; COLOR: rgb(51,51,51); TEXT-INDENT: 0px; LINE-HEIGHT: 24px">2.拔长 拔长是使坯料的长度增加，<SPAN><A href="http://www.mcmtwt.com/"><SPAN class=15 style="FONT-SIZE: 12pt; COLOR: rgb(128,0,128); FONT-FAMILY: '宋体'; TEXT-DECORATION: underline; mso-spacerun: 'yes'">www.mcmtwt.com</SPAN></A></SPAN>截面减小的锻造工序，通常用来生产轴类件毛坯，如车床主轴、连杆等。</DIV>
<DIV class=para style="MARGIN: 0px; COLOR: rgb(51,51,51); TEXT-INDENT: 0px; LINE-HEIGHT: 24px">3.冲孔 用冲子在坯料上冲出通孔或不通孔的锻造工序。</DIV>
<DIV class=para style="MARGIN: 0px; COLOR: rgb(51,51,51); TEXT-INDENT: 0px; LINE-HEIGHT: 24px">4.弯曲 使坯料弯曲成一定角度或形状的锻造工序。</DIV>
<DIV class=para style="MARGIN: 0px; COLOR: rgb(51,51,51); TEXT-INDENT: 0px; LINE-HEIGHT: 24px">5.扭转 使坯料的一部分相对另一部分旋转一定角度的锻造工序。</DIV>
<DIV class=para style="MARGIN: 0px; COLOR: rgb(51,51,51); TEXT-INDENT: 0px; LINE-HEIGHT: 24px">6.切割 分割坯料或切除料头的锻造工序。</DIV>
<DIV class=para style="MARGIN: 0px; COLOR: rgb(51,51,51); TEXT-INDENT: 0px; LINE-HEIGHT: 24px">二、模锻<SPAN class=Apple-style-span style="WORD-SPACING: 0px; FONT: 14px/24px arial, 宋体, sans-serif; TEXT-TRANSFORM: none; COLOR: rgb(0,0,0); TEXT-INDENT: 0px; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); webkit-text-size-adjust: auto; orphans: 2; widows: 2; webkit-text-decorations-in-effect: none; webkit-text-stroke-width: 0px"></DIV>
<DIV class=para style="MARGIN: 0px; COLOR: rgb(51,51,51); TEXT-INDENT: 0px; LINE-HEIGHT: 24px">
<DIV class=para style="MARGIN-BOTTOM: 5px; COLOR: rgb(51,51,51); TEXT-INDENT: 2em; LINE-HEIGHT: 24px"><SPAN class=Apple-style-span style="WORD-SPACING: 0px; FONT: 14px/24px arial, 宋体, sans-serif; TEXT-TRANSFORM: none; COLOR: rgb(51,51,51); TEXT-INDENT: 28px; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); webkit-text-size-adjust: auto; orphans: 2; widows: 2; webkit-text-decorations-in-effect: none; webkit-text-stroke-width: 0px">模锻全称为模型锻造，将加热后的坯料放置在固定于模锻设备上的锻模内锻造成形的。</SPAN></DIV>
<DIV class=para style="MARGIN-BOTTOM: 5px; COLOR: rgb(51,51,51); TEXT-INDENT: 2em; LINE-HEIGHT: 24px"><SPAN class=Apple-style-span style="WORD-SPACING: 0px; FONT: 14px/24px arial, 宋体, sans-serif; TEXT-TRANSFORM: none; COLOR: rgb(51,51,51); TEXT-INDENT: 28px; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); webkit-text-size-adjust: auto; orphans: 2; widows: 2; webkit-text-decorations-in-effect: none; webkit-text-stroke-width: 0px"><SPAN class=Apple-style-span style="WORD-SPACING: 0px; FONT: 14px/24px arial, 宋体, sans-serif; TEXT-TRANSFORM: none; COLOR: rgb(51,51,51); TEXT-INDENT: 0px; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); webkit-text-size-adjust: auto; orphans: 2; widows: 2; webkit-text-decorations-in-effect: none; webkit-text-stroke-width: 0px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1.&nbsp;模锻的基本工序 模锻工艺过程：下料、加热、预锻、终锻、冲连皮、切边、调质、喷丸。常用工艺有镦粗、拔长，折弯、冲孔、成型。</SPAN></SPAN></DIV>
<DIV class=para style="MARGIN-BOTTOM: 5px; COLOR: rgb(51,51,51); TEXT-INDENT: 2em; LINE-HEIGHT: 24px"><SPAN class=Apple-style-span style="WORD-SPACING: 0px; FONT: 14px/24px arial, 宋体, sans-serif; TEXT-TRANSFORM: none; COLOR: rgb(51,51,51); TEXT-INDENT: 28px; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); webkit-text-size-adjust: auto; orphans: 2; widows: 2; webkit-text-decorations-in-effect: none; webkit-text-stroke-width: 0px"><SPAN class=Apple-style-span style="WORD-SPACING: 0px; FONT: 14px/24px arial, 宋体, sans-serif; TEXT-TRANSFORM: none; COLOR: rgb(51,51,51); TEXT-INDENT: 0px; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); webkit-text-size-adjust: auto; orphans: 2; widows: 2; webkit-text-decorations-in-effect: none; webkit-text-stroke-width: 0px"></SPAN></SPAN>2.<SPAN class=Apple-style-span style="WORD-SPACING: 0px; FONT: 14px/24px arial, 宋体, sans-serif; TEXT-TRANSFORM: none; COLOR: rgb(51,51,51); TEXT-INDENT: 0px; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); webkit-text-size-adjust: auto; orphans: 2; widows: 2; webkit-text-decorations-in-effect: none; webkit-text-stroke-width: 0px">常用模锻设备 常用模锻设备有模锻锤、热模锻压力机、平锻机和摩擦压力机等。</SPAN></DIV>
<DIV class=para style="MARGIN-BOTTOM: 5px; COLOR: rgb(51,51,51); TEXT-INDENT: 2em; LINE-HEIGHT: 24px"><SPAN class=Apple-style-span style="WORD-SPACING: 0px; FONT: 14px/24px arial, 宋体, sans-serif; TEXT-TRANSFORM: none; COLOR: rgb(51,51,51); TEXT-INDENT: 0px; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); webkit-text-size-adjust: auto; orphans: 2; widows: 2; webkit-text-decorations-in-effect: none; webkit-text-stroke-width: 0px"></SPAN>通俗地讲，锻造法兰质量更好，一般是通过模锻生产，晶体组织细密，强度高，当然价格也贵一些。</DIV>
<DIV class=para style="MARGIN-BOTTOM: 5px; COLOR: rgb(51,51,51); TEXT-INDENT: 2em; LINE-HEIGHT: 24px">无论是铸造法兰还是锻造法兰都属于法兰常用制造方法，看需要使用的部件的强度要求，如果要求不高，还可以选用车削制法兰。</DIV></SPAN></DIV></SPAN>
<P><SPAN class=Apple-style-span style="WORD-SPACING: 0px; FONT: 14px/24px arial, 宋体, sans-serif; TEXT-TRANSFORM: none; COLOR: rgb(0,0,0); TEXT-INDENT: 0px; WHITE-SPACE: normal; LETTER-SPACING: normal; BACKGROUND-COLOR: rgb(255,255,255); webkit-text-size-adjust: auto; orphans: 2; widows: 2; webkit-text-decorations-in-effect: none; webkit-text-stroke-width: 0px"></SPAN>&nbsp;</P>

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