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<DIV style="TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(255,255,255); TEXT-INDENT: 0px; FONT: 12px/20px Simsun; WHITE-SPACE: normal; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px"><SPAN style="PADDING-BOTTOM: 5px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; DISPLAY: inline; HEIGHT: auto; PADDING-TOP: 0px" class=lemmaTitleH1><SPAN style="LINE-HEIGHT: 24px; TEXT-INDENT: 28px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px"> <P><STRONG style="TEXT-ALIGN: left; PADDING-BOTTOM: 0px; LINE-HEIGHT: 19px; TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(239,239,239); FONT-VARIANT: normal; FONT-STYLE: normal; TEXT-INDENT: 0px; MARGIN: 0px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; FONT-FAMILY: 宋体; WHITE-SPACE: normal; LETTER-SPACING: normal; COLOR: rgb(0,0,0); FONT-SIZE: 13px; WORD-SPACING: 0px; PADDING-TOP: 0px; -webkit-text-stroke-width: 0px"><SPAN><A href="http://www.gygjc.com/"><SPAN style="FONT-FAMILY: '宋体'; COLOR: rgb(0,0,255); FONT-SIZE: 12pt; TEXT-DECORATION: underline; mso-spacerun: 'yes'" class=15>孟村管件</SPAN></A></SPAN><SPAN><A href="http://www.gygjc.com/"><SPAN style="FONT-FAMILY: '宋体'; COLOR: rgb(0,0,255); FONT-SIZE: 12pt; TEXT-DECORATION: underline; mso-spacerun: 'yes'" class=15>http://www.gygjc.com</SPAN></A></SPAN></STRONG></P></SPAN></SPAN></DIV> <DIV style="TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(255,255,255); TEXT-INDENT: 0px; FONT: 12px/20px Simsun; WHITE-SPACE: normal; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px"><SPAN style="PADDING-BOTTOM: 5px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; DISPLAY: inline; HEIGHT: auto; PADDING-TOP: 0px" class=lemmaTitleH1><SPAN style="LINE-HEIGHT: 24px; TEXT-INDENT: 28px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px">按法兰密封面型式的不同,常用的法兰有突面法兰(也称平面法兰)、凹凸面法兰、榫槽面法兰<SPAN style="LINE-HEIGHT: 24px; TEXT-INDENT: 28px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px">三种。突面法兰的密封面是平面,与垫片接触面积较大,预紧后垫片易向两侧伸展或移动,密封性较差,只适合低压场合。凹凸面法兰、榫槽面法兰密封性较好,适合压力更高的场合。<BR></DIV></SPAN></SPAN></SPAN> <DIV style="TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(255,255,255); TEXT-INDENT: 0px; FONT: 12px/20px Simsun; WHITE-SPACE: normal; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px"><SPAN style="PADDING-BOTTOM: 5px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; DISPLAY: inline; HEIGHT: auto; PADDING-TOP: 0px" class=lemmaTitleH1><SPAN style="LINE-HEIGHT: 24px; TEXT-INDENT: 28px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px"><SPAN style="LINE-HEIGHT: 24px; TEXT-INDENT: 28px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px"></SPAN></SPAN></SPAN> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>主要生产工艺主要分为锻造、铸造、割制、卷制这四种。</DIV> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>铸造出来的法兰,毛坯形状尺寸准确,加工量小,成本低,但有铸造缺陷(气孔、裂纹、夹杂);铸件内部组织流线型较差(如果是切削件,流线型更差);</DIV> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para><A style="COLOR: rgb(0,0,0); FONT-SIZE: 9pt; TEXT-DECORATION: none" href="http://www.czkrtgj.com/falan/590.html">锻造法兰</A>含碳低,一般比铸造法兰不易生锈,且锻件流线型好,组织比较致密,机械性能优于铸造法兰;</DIV> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>锻造工艺不当也会出现晶粒大或不均,硬化裂纹现象,锻造成本高于铸造法兰。</DIV> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>锻件比铸件能承受更高的剪切力和拉伸力。</DIV> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>铸件的优点在于可以搞出比较复杂的外形,成本比较<SPAN style="TEXT-INDENT: 2em">低;</SPAN></DIV><SPAN style="LINE-HEIGHT: 24px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px"><SPAN style="LINE-HEIGHT: 24px; TEXT-INDENT: 28px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px"></SPAN></SPAN> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>锻件优点在于内部组织均匀,不存在铸件中的气孔,夹杂等有害缺陷;</DIV> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>从生产工艺流程区别铸造法兰和锻造法兰的不同,比如离心法兰就属于铸造法兰的一种。</DIV> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>离心法兰属于精密铸造方法生产法兰,该种铸造较普通砂型铸造组织要细很多,质量提高不少,不易出现组织疏松、气孔、沙眼等问题。</DIV> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>首先我们需要了解离心法兰是怎样生产制作的,离心浇铸制做<A style="COLOR: rgb(0,0,0); FONT-SIZE: 9pt; TEXT-DECORATION: none" href="http://www.czkrtgj.com/falan/592.html">平焊法兰</A>的工艺方法及产品,其特征是该产品经过下列工艺步骤加工而成:</DIV> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>①将所选原材料钢材放入中频电炉熔炼,<SPAN style="TEXT-INDENT: 2em">使钢水温度达到1600-1700℃;</SPAN></DIV><SPAN style="LINE-HEIGHT: 24px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px"><SPAN style="LINE-HEIGHT: 24px; TEXT-INDENT: 28px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px"></SPAN></SPAN> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>②将金属模具预加热到800-900℃保持恒温;</DIV> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>③起动离心机,将步骤①中钢水注入步骤②中预热后金属模具;</DIV> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>④铸件自然冷却到800-900℃保持1-10分钟;</DIV> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>⑤用水冷却至接近常温,脱模取出铸件。</DIV><SPAN style="LINE-HEIGHT: 24px; FONT-FAMILY: 微软雅黑, 黑体, Verdana; WHITE-SPACE: normal; FONT-SIZE: 24px">生产工艺流程</SPAN><BR></DIV> <DIV style="TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(255,255,255); TEXT-INDENT: 0px; FONT: 12px/20px Simsun; WHITE-SPACE: normal; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px"><SPAN style="LINE-HEIGHT: 24px; FONT-FAMILY: 微软雅黑, 黑体, Verdana; WHITE-SPACE: normal; FONT-SIZE: 24px"></SPAN> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>锻造工艺过程一般由以下工序组成,即选取优质钢坯下料、加热、成形、锻后冷却。锻造的工艺方法有自由锻、模锻和胎膜锻,生产时,按锻件质量的大小,生产批量的多少选择不同的锻造方法。</DIV> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>自由锻生产率低,加工余量大,但工具简单,通用性大,故被广泛用于锻造形状较简单的单件、小批生产的锻件。自由锻设备有空气锤、蒸汽-空气锤和水压机等,分别适合小、中和大型锻件的生产。模锻生产率高,操作简单,容易实现机械化和自动化。模锻件尺寸精度高,机械加工余量小,锻件的纤维组织分布更为合理,可进一步提高零件的使用寿命。</DIV> <H3 style="PADDING-BOTTOM: 0px; LINE-HEIGHT: 19px; MARGIN: 20px 0px 12px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; FONT-FAMILY: 微软雅黑, 黑体, Verdana; WHITE-SPACE: normal; CLEAR: both; FONT-SIZE: 18px; FONT-WEIGHT: 500; PADDING-TOP: 0px" class=headline-2><SPAN class=headline-content>自由锻</SPAN></H3> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>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 style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>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 style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>2.拔长 拔长是使坯料的长度增加,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 style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>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 style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>4.弯曲 使坯料弯曲成一定角度或形状的锻造工序。</DIV> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>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 style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>6.切割 分割坯料或切除料头的锻造工序。</DIV> <H3 style="PADDING-BOTTOM: 0px; LINE-HEIGHT: 19px; MARGIN: 20px 0px 12px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; FONT-FAMILY: 微软雅黑, 黑体, Verdana; WHITE-SPACE: normal; CLEAR: both; FONT-SIZE: 18px; FONT-WEIGHT: 500; PADDING-TOP: 0px" class=headline-2><SPAN class=headline-content>模锻</SPAN></H3></DIV> <DIV style="TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(255,255,255); TEXT-INDENT: 0px; FONT: 12px/20px Simsun; WHITE-SPACE: normal; LETTER-SPACING: normal; COLOR: rgb(0,0,0); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px"> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>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。</DIV> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>1.模锻的基本工序: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。</DIV> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>2.常用模锻设备:模锻锤、热模锻压力机、平锻机和摩擦压力机等。</DIV> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>通俗地讲,锻造法兰质量更好,且一般是通过模锻生产,其晶体组织细密,强度高,当然价格也贵一些。</DIV> <DIV style="LINE-HEIGHT: 24px; TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px" class=para>无论是铸造法兰还是锻造法兰都属于法兰常用制造方法,如果对需要使用的部件的强度要求不高,还可以选用车削制法兰。</DIV></DIV> <DIV style="TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(255,255,255); TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT: 14px/24px arial, 宋体, sans-serif; WHITE-SPACE: normal; LETTER-SPACING: normal; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px" class=para> <H3 style="PADDING-BOTTOM: 0px; LINE-HEIGHT: 19px; MARGIN: 20px 0px 12px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; FONT-FAMILY: 微软雅黑, 黑体, Verdana; WHITE-SPACE: normal; CLEAR: both; FONT-SIZE: 18px; FONT-WEIGHT: 500; PADDING-TOP: 0px" class=headline-2><SPAN class=headline-content>割制法兰</SPAN></H3></DIV> <DIV style="TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(255,255,255); TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT: 14px/24px arial, 宋体, sans-serif; WHITE-SPACE: normal; LETTER-SPACING: normal; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px" class=para><SPAN style="LINE-HEIGHT: 24px; TEXT-INDENT: 28px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px">在中板上直接切割出法兰的留有加工量的内外径及厚度的圆盘,</SPAN><SPAN style="LINE-HEIGHT: 24px; TEXT-INDENT: 28px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px">再进行螺栓孔及水线的加工。</SPAN><SPAN style="LINE-HEIGHT: 24px; TEXT-INDENT: 28px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px">这样生产出来的法兰就叫做割制法兰,</SPAN><SPAN style="LINE-HEIGHT: 24px; TEXT-INDENT: 28px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px">此类法兰最大直径以中板的幅宽为限。</SPAN><BR></DIV> <DIV style="TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(255,255,255); TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT: 14px/24px arial, 宋体, sans-serif; WHITE-SPACE: normal; LETTER-SPACING: normal; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px" class=para><SPAN style="LINE-HEIGHT: 24px; TEXT-INDENT: 28px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px"> <H3 style="PADDING-BOTTOM: 0px; LINE-HEIGHT: 19px; MARGIN: 20px 0px 12px; PADDING-LEFT: 0px; PADDING-RIGHT: 0px; FONT-FAMILY: 微软雅黑, 黑体, Verdana; WHITE-SPACE: normal; CLEAR: both; FONT-SIZE: 18px; FONT-WEIGHT: 500; PADDING-TOP: 0px" class=headline-2><SPAN class=headline-content>卷制法兰</SPAN></H3></SPAN></DIV> <DIV style="TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(255,255,255); TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT: 14px/24px arial, 宋体, sans-serif; WHITE-SPACE: normal; LETTER-SPACING: normal; COLOR: rgb(51,51,51); WORD-SPACING: 0px; -webkit-text-stroke-width: 0px" class=para><SPAN style="LINE-HEIGHT: 24px; TEXT-INDENT: 28px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px"><SPAN style="LINE-HEIGHT: 24px; TEXT-INDENT: 28px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px">用中板割条子然后卷制成圆的工艺叫做卷制,</SPAN><SPAN style="LINE-HEIGHT: 24px; TEXT-INDENT: 28px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px">多用于一些大型法兰的生产。</SPAN><SPAN style="LINE-HEIGHT: 24px; TEXT-INDENT: 28px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px">卷制成功之后进行焊接,</SPAN><SPAN style="LINE-HEIGHT: 24px; TEXT-INDENT: 28px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px">然后压平,</SPAN><SPAN style="LINE-HEIGHT: 24px; TEXT-INDENT: 28px; FONT-FAMILY: arial, 宋体, sans-serif; WHITE-SPACE: normal; COLOR: rgb(51,51,51); FONT-SIZE: 14px">再进行水线及螺栓孔的工艺的加工。</SPAN></SPAN></DIV> <DIV style="TEXT-TRANSFORM: none; BACKGROUND-COLOR: rgb(255,255,255); TEXT-INDENT: 2em; MARGIN: 15px 0px 5px; FONT: 14px/24px arial, 宋体, sans-serif; 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