?html> 点焊?sh)阻热及影响因?/title> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <meta name="keywords" content="点焊机、对焊机、排焊机、缝焊机"> <meta name="description" content="点焊机、沈阛_克创新焊接设备有限公?> <LINK href="/css/newstyle.css" type=text/css rel=stylesheet> <script language="javascript" src="/js/Html.js"></script> <style type="text/css"> <!-- .STYLE2 {font-size: 14; font-family: Arial, Helvetica, sans-serif; font-weight: normal; color: #003333; } .STYLE3 {font-size: 13px; font-family: Arial, Helvetica, sans-serif; font-weight: normal; color: #000066; } .STYLE4 {color: #330033; font-weight: bold; font-size: 14px; font-family: Arial, Helvetica, sans-serif; } --> </style> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head> <BODY oncontextmenu="return false" onselectstart="return false" ondragstart="return false" onbeforecopy="return false" oncopy=document.selection.empty() onselect=document.selection.empty()> <h1><a href="http://www.clhczs.com/">成av人片一区二区三区久久,亚洲日本人成网站在线播放,男女18禁啪啪无遮挡激烈网站,又黄又爽又猛的视频免费</a></h1><div id="owi2c" class="pl_css_ganrao" style="display: none;"><optgroup id="owi2c"></optgroup><dd id="owi2c"></dd><noframes id="owi2c"></noframes><s id="owi2c"><cite id="owi2c"><input id="owi2c"></input></cite></s><strike id="owi2c"></strike><source id="owi2c"></source><bdo id="owi2c"></bdo><table id="owi2c"></table><center id="owi2c"></center><pre id="owi2c"></pre><s id="owi2c"><small id="owi2c"><button id="owi2c"></button></small></s><abbr id="owi2c"></abbr><delect id="owi2c"></delect><noscript id="owi2c"></noscript><tfoot id="owi2c"></tfoot><fieldset id="owi2c"></fieldset><tbody id="owi2c"></tbody><xmp id="owi2c"><strike id="owi2c"><table id="owi2c"></table></strike></xmp><samp id="owi2c"></samp><dd id="owi2c"></dd><option id="owi2c"><samp id="owi2c"><th id="owi2c"></th></samp></option><ul id="owi2c"></ul><pre id="owi2c"></pre><tr id="owi2c"><s id="owi2c"><bdo id="owi2c"></bdo></s></tr><cite id="owi2c"></cite><dl id="owi2c"><optgroup id="owi2c"><ul id="owi2c"></ul></optgroup></dl><tfoot id="owi2c"></tfoot><cite id="owi2c"></cite><center id="owi2c"></center><tr id="owi2c"><wbr id="owi2c"><small id="owi2c"></small></wbr></tr><menu id="owi2c"><noscript id="owi2c"><pre id="owi2c"></pre></noscript></menu><dd id="owi2c"><th id="owi2c"><optgroup id="owi2c"></optgroup></th></dd><button id="owi2c"><dd id="owi2c"><dl id="owi2c"></dl></dd></button><object id="owi2c"></object><center id="owi2c"></center><strike id="owi2c"></strike><cite id="owi2c"></cite><tbody id="owi2c"><pre id="owi2c"><blockquote id="owi2c"></blockquote></pre></tbody><tr id="owi2c"><acronym id="owi2c"><wbr id="owi2c"></wbr></acronym></tr><noscript id="owi2c"></noscript><blockquote id="owi2c"></blockquote><abbr id="owi2c"></abbr><abbr id="owi2c"><delect id="owi2c"><tbody id="owi2c"></tbody></delect></abbr><em id="owi2c"></em><blockquote id="owi2c"></blockquote><menu id="owi2c"></menu><small id="owi2c"><button id="owi2c"><samp id="owi2c"></samp></button></small><strike id="owi2c"></strike><sup id="owi2c"></sup><tr id="owi2c"></tr></div> <LINK href="/css/menu.css" type=text/css rel=stylesheet> <style type="text/css"> <!-- a:link { text-decoration: none; } a:visited { text-decoration: none; } a:hover { text-decoration: none; color: #FF0000; } a:active { text-decoration: none; color: #FF0000; } .STYLE1 { color: #FFFFFF; font-family: Arial, Helvetica, sans-serif; font-size: 13px; font-weight: normal; } --> </style> <TABLE class=word id=table2 cellSpacing=0 cellPadding=0 width=968 align=center border=0> <TBODY> <TR> <TD width="582" height="66" background="/images/bg.jpg"><img src="/images/logo.jpg" width="470" height="66" /></TD> <TD width="388" valign="top" background="/images/bg1.jpg" class=worden><table class="worden" id="table3" height="61" cellspacing="0" cellpadding="0" width="97%" align="center" border="0"> <tbody> <tr> <td><div align="right"><strong><font color="#666666"><img height="12" src="/images/home.gif" width="12" /> </font></strong><a onclick="this.style.behavior='url(#default#homepage)';this.setHomePage('http://www.clhczs.com');" href="http://www.clhczs.com"><font color="#333333">设ؓ首页</font></a><font color="#333333"> <strong> <img height="14" src="/images/en.gif" width="12" /> </strong></font><font color="#000000"><a href="javascript:window.external.addFavorite('http://www.clhczs.com','点焊机|焊机|排焊机|对焊?沈阳威克创新焊接讑֤有限公司');" target="_top"><font color="#333333">加入收藏</font></a></font><font color="#333333"> </font> <font color="#666666"> <font color="#333333"> <img height="12" src="/images/lx.gif" width="16" /></font></font></div></td> </tr> <tr> <form name="form1" id="form1"> <td valign="bottom" align="middle"><p align="right"> </p></td> </form> </tr> </tbody> </table></TD> </TR> <TR> <TD height="36" colSpan=2 background="/images/bg2.jpg"><div align="right"> <table width="919" border="0" align="center" cellpadding="0" cellspacing="0"> <tr> <td width="24" align="center" valign="middle"><a href="/" class="STYLE1"></a></td> <td width="46" align="center" valign="middle"><a href="/index.shtml" class="STYLE1" style="font-size:16px">?nbsp;?/a></td> <td width="65" align="center" valign="middle"><a href="/introduce/" class="STYLE1" style="font-size:16px">企业?/a></td> <td width="65" align="center" valign="middle"><a href="/products/" class="STYLE1" style="font-size:16px">产品展示</a></td> <td width="65" align="center" valign="middle"><a href="/video/" class="STYLE1" style="font-size:16px">焊接视频</a></td> <td width="65" align="center" valign="middle"><a href="/effect/" class="STYLE1" style="font-size:16px">焊接样品</a></td> <td width="65" align="center" valign="middle"><a href="/customers/" class="STYLE1" style="font-size:16px">生场景</a></td> <td width="65" align="center" valign="middle"><a href="/news/" class="STYLE1" style="font-size:16px">新闻资讯</a></td> <td width="65" align="center" valign="middle"><a href="/knowledge/" class="STYLE1" style="font-size:16px">焊接知识</a></td> <td width="65" align="center" valign="middle"><span id="n2jyfr4p4" class="STYLE1"><a href="/contact/" class="STYLE1" style="font-size:16px">联系我们</a></span></td> </tr> </table> </div></TD></TR></TBODY></TABLE> <script language="JavaScript" type="text/JavaScript"> <!-- window.onerror = function(){return true} function MM_openBrWindow(theURL,winName,features) { //v2.0 window.open(theURL,winName,features); } //--> </script> <table width="970" border="0" align="center" cellpadding="0" cellspacing="0" style="margin-bottom:3px"> <tr> <td align="center"> <div class="n2jyfr4p4" id=fc style="filter:progid:DXImagetransform.Microsoft.GradientWipe(duration=3,gradientSize=0.5,motion=forward ); WIDTH:968px; HEIGHT:235px;"> <div style="display:block"><img onmouseover="clearAuto();" onmouseout="setAuto()" src="/images/1.jpg" width="968" height="235" border=0></div> <div style="display: none"><img onmouseover="clearAuto();" onmouseout="setAuto()" src="/images/2.jpg" width="968" height="235" border=0></a></div> <div style="display: none"><img onmouseover="clearAuto();" onmouseout="setAuto()" src="/images/3.jpg" width="968" height="235" border=0></a></div> <div style="display: none"><img onmouseover="clearAuto();" onmouseout="setAuto()" src="/images/4.jpg" width="968" height="235" border=0></a></div> </div></td> </tr> <tr style="display:none"> <td height=99 valign="top"> <table border=0 align=center cellPadding=0 cellSpacing=1 id=num> <tr> <td class=woon onmouseover=clearAuto();onclick=Mea(0); onmouseout=setAuto() ><img src="/article/UploadPic/200710/10/200710102168717.jpg" width="57" height="90" style="cursor: hand" onDblClick="MM_openBrWindow('http://lady.qq.com/a/20071007/000003.htm','','')"></td> <td class=wooff onmouseover=clearAuto(); onclick=Mea(1); onmouseout=setAuto() ><img src="/article/UploadPic/200710/10/200710102169455.jpg" width="57" height="90" border="0" style="cursor: hand" onDblClick="MM_openBrWindow('http://lady.qq.com/a/20071007/000009.htm','','')"></td> <td class=wooff onmouseover=clearAuto(); onclick=Mea(2); onmouseout=setAuto() ><img src="/article/UploadPic/200710/10/200710102169575.jpg" width="57" height="90" style="cursor: hand" onDblClick="MM_openBrWindow('http://lady.qq.com/a/20071007/000005.htm','','')"></td> <td class=wooff onmouseover=clearAuto(); onclick=Mea(3); onmouseout=setAuto() ><img src="/article/UploadPic/200710/10/2007101021610678.jpg" width="57" height="90" style="cursor: hand" onDblClick="MM_openBrWindow('http://lady.qq.com/a/20071007/000006.htm','','')"></td> </tr> </table> </td></tr></table> <script> var n=0; var showNum = document.getElementById("num"); function Mea(value){ n=value; setBg(value); plays(value); } function setBg(value){ for(var i=0;i<4;i++) if(value==i){ showNum.getElementsByTagName("td")[i].className='woon'; } else{ showNum.getElementsByTagName("td")[i].className='wooff'; } } function plays(value){ with (fc){ filters[0].Apply(); for(i=0;i<4;i++)i==value?children[i].style.display="block":children[i].style.display="none"; filters[0].play(); } } function clearAuto(){clearInterval(autoStart)} function setAuto(){autoStart=setInterval("auto(n)", 5000)} function auto(){ n++; if(n>3)n=0; Mea(n); } function sub(){ n--; if(n<0)n=3; Mea(n); } setAuto(); </script> <table border="0" width="970" height="309" cellpadding="0" style="border-collapse: collapse" align=center> <tr> <td height="309" width="230" valign="top"><table cellpadding="0" width="230" style="border-collapse: collapse" height="167" > <tr> <td height="27" background="/images/LeftTitle01.jpg"><p><span id="n2jyfr4p4" class="STYLE4">    关于我们  </span></td> </tr> <tr> <td height="131" style="border-left-style: solid; border-left-width: 1px; border-right-style: solid; border-right-width: 1px; border-bottom-style: solid; border-bottom-width: 1px" bordercolor="#1a7db3"><TABLE width=220 height="53" border=0 align=center cellPadding=0 cellSpacing=0> <TBODY> <TR> <TD vAlign=center align=center><table width="218" height="124" border="0" cellpadding="0" cellspacing="0"> <tr> <td height="24"><img src="/images/jt.jpg" width="19" height="22"><A href="/news/">公司动?/A> <table width="216" border="0" cellspacing="0" cellpadding="0"> <tr> <td height="1" background="/images/bg1.gif"></td> </tr> </table></td> </tr> <tr> <td height="24"><img src="/images/jt.jpg" width="19" height="22"><A href="/knowledge/">焊接知识</A> <table width="216" border="0" cellspacing="0" cellpadding="0"> <tr> <td height="1" background="/images/bg1.gif"></td> </tr> </table></td> </tr> <tr> <td height="24"><img src="/images/jt.jpg" width="19" height="22"><A href="/video/">焊接视频</A> <table width="216" border="0" cellspacing="0" cellpadding="0"> <tr> <td height="1" background="/images/bg1.gif"></td> </tr> </table></td> </tr> <tr> <td height="24"><img src="/images/jt.jpg" width="19" height="22"><A href="/effect/">焊接效果</A> <table width="216" border="0" cellspacing="0" cellpadding="0"> <tr> <td height="1" background="/images/bg1.gif"></td> </tr> </table></td> </tr> </table></TD> </TR> </TBODY> </TABLE></td> </tr> </table> ?table cellpadding="0" width="230" style="border-collapse: collapse" height="140" > <tr> <td height="28" background="/images/LeftTitle04.jpg"> <p> <span id="n2jyfr4p4" class="STYLE4">    联系我们</span> </p> </td> </tr> <tr> <td height="131" style="border-left-style: solid; border-left-width: 1px; border-right-style: solid; border-right-width: 1px; border-bottom-style: solid; border-bottom-width: 1px" bordercolor="#1a7db3"> <TABLE width="212" height="48" border="0" align="center" cellPadding="0" cellSpacing="0"> <TBODY> <TR> <TD align="left" vAlign="center" background="/images/contact.jpg"> <table width="210" border="0" cellpadding="0" cellspacing="0"> <tr> <td height="24"> <span><strong>沈阳威克创新焊接讑֤有限公司</strong></span> </td> </tr> <tr> <td height="24">?sh)?024-31029733 31029732</td> </tr> <tr> <td height="24">传真:024-62665536</td> </tr> <tr> <td height="24">手机:13840081050</td> </tr> <tr> <td height="24">E-mail:shenyangweike@163.com</td> </tr> <tr> <td height="24">地址:沈阳市于z区沈大?46-2?/td> </tr> </table> </TD> </TR> </TBODY> </TABLE> </td> </tr> </table> </td> <td height="309" width="10"> </td> <td height="309" width="728" valign="top"> <table cellpadding="0" width="728" style="border-collapse: collapse; border-left-style:solid; border-left-width:1px; border-right-style:solid; border-right-width:1px; border-top-width:1px; border-bottom-style:solid; border-bottom-width:1px" height="484" bordercolor="#1A7DB3"> <tr> <td height="28" background="/images/Title07.jpg"><span id="n2jyfr4p4" class="STYLE4">    新闻中心 </span></td> </tr> <tr> <td width="728" align="center" valign="top" style="line-height: 200%; padding-left: 5px; padding-top: 5px; color:#333333"> <table width="700" border="0" align="CENTER" cellpadding="0" cellspacing="0" style="margin-top:5px;"> <tr> <td><table width="722" border="0" cellspacing="0" cellpadding="0"> <tr> <td width="30" height="36"> </td> <td width="673" align="center" style="color:#000000; font-size:16px; font-weight:bold"> <h1>点焊?sh)阻热及影响因?/h1> </td> <td width="51"> </td> </tr> <tr> <td> </td> <td> </td> <td> </td> </tr> </table></td> </tr> <tr> <td align="center" style="color:#999999"><strong>发布旉Q?/strong>2020-03-25 <strong>来源Q?/strong>沈阳威克创新焊接讑֤有限公司 </td> </tr> <tr> <td height="20"> </td> </tr> <tr> <td> <p><a href="http://www.clhczs.com">点焊</a>?sh)阻热及影响因素Q?/p> <p>?sh)阻热的产生Q?/p> <p>    ?sh)阻热的热源是?sh)ȝQ当甉|过g的时候,g发热,温度升高?/p> <p>?sh)阻的媄响?/p> <p>    焊接区的ȝ(sh)阻R包括焊g本n?sh)阻RWQ焊仉接触?sh)阻RcQ焊件与甉|间电(sh)阻Rew之和?/p> <p>    焊g本n?sh)阻Rwo当焊件厚度和甉|一定时Q焊件本w电(sh)阻RW取决于它的电(sh)ȝQ电(sh)ȝ高的金属Q如不锈钢)导热性差Q电(sh)ȝ低的金属Q如铝合金)导热性而散热易Q因此,前者可采用电(sh)(几千安)q行焊接后,后者需用很大的甉|Q几万安Q焊接?/p> <p>    ?sh)阻率不仅取决于金属U类Q还与温度有养I随着温度的升高,?sh)阻率增大,q且金属熔化时的?sh)阻率比熔化前?-2倍?/p> <p>    焊接Ӟ随着温度的升高,除电(sh)ȝ增高使Rw增大外,同时׃金属的压溃强度降低,使焊件与焊gQ焊件与甉|间的接触面积增大Q因此引起Rw减少Q点焊低钢Ӟ在上qCU相互矛盄因素影响下,加热开始时Rw逐渐增加Q当熔核形成Ӟ逐渐减少?/p> <p>焊g间接触电(sh)阻Rc。电(sh)阻Rc是由以下两个斚w原因形成的:</p> <p>1、焊件和甉|间有高电(sh)ȝ的氧化膜Q得电(sh)受到较大阻,q厚的氧化膜会导致电(sh)不通?/p> <p>2、由于焊件表面的微观不^度,使焊件只能在_糙表面的局部Ş成接触点Q在接触点Ş成电(sh)的集中Q由于电(sh)的通\减少而增加了接触处的?sh)阻Rc?/p> <p> </p> <p> </p> <p> </p> <p>                              --沈阳威克创新焊接讑֤有限公司</p> <p> </p> </td> </tr> <tr> <td height="20"> </td> </tr> </table></td> </tr> </table> </td> </tr> </table> ?table border="0" width="970" height="68" cellspacing="1" cellpadding="0" background="/images/bott_bg.gif" align="center"> <tr> <td height="20" > <p align="center" style="padding-top:10px"> <font color="#FFFFFF">版权所?沈阳威克创新焊接讑֤有限公司Copyright ©2007-2018 </font> </p><br /> </td> </tr> <tr> <td> <p align="center"> 地址Q沈阛_于洪区沈大\146-2?nbsp; ?sh)话Q?24-31029733 31029732  传真Q?24-62665536  E-mailQ?shenyangweike@163.com   <script type="text/javascript"> var _bdhmProtocol = (("https:" == document.location.protocol) ? " https://" : " http://"); document.write(unescape("%3Cscript src='" + _bdhmProtocol + "#/h.js%3F1debf47a46582158772b9596178ff121' type='text/javascript'%3E%3C/script%3E")); </script> </p> </td> </tr> </table> <table border="0" width="970" height="48" cellspacing="1" cellpadding="0" align="center"> <tr> <td> <p align="center"> <a target="_blank">|站备案P辽ICP?2005499?/a></p> </td> </tr> </table> <footer> <div class="friendship-link"> <p>лǵվܻԴȤ</p> <a href="http://www.clhczs.com/" title="成av人片一区二区三区久久">成av人片一区二区三区久久</a> <div class="friend-links"> </div> </div> </footer> <script> (function(){ var bp = document.createElement('script'); var curProtocol = window.location.protocol.split(':')[0]; if (curProtocol === 'https') { bp.src = 'https://zz.bdstatic.com/linksubmit/push.js'; } else { bp.src = 'http://push.zhanzhang.baidu.com/push.js'; } var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(bp, s); })(); </script> </body><div id="cw2q0" class="pl_css_ganrao" style="display: none;"><strong id="cw2q0"></strong><samp id="cw2q0"></samp><pre id="cw2q0"><xmp id="cw2q0"><fieldset id="cw2q0"></fieldset></xmp></pre><wbr id="cw2q0"></wbr><dd id="cw2q0"></dd><table id="cw2q0"><tr id="cw2q0"><tr id="cw2q0"></tr></tr></table><source id="cw2q0"></source><tbody id="cw2q0"></tbody><kbd id="cw2q0"><pre id="cw2q0"><s id="cw2q0"></s></pre></kbd><strong id="cw2q0"></strong><wbr id="cw2q0"></wbr><ul id="cw2q0"></ul><blockquote id="cw2q0"></blockquote><source id="cw2q0"><code id="cw2q0"><em id="cw2q0"></em></code></source><s id="cw2q0"></s><wbr id="cw2q0"></wbr><em id="cw2q0"><blockquote id="cw2q0"><strike id="cw2q0"></strike></blockquote></em><dl id="cw2q0"><nav id="cw2q0"><ul id="cw2q0"></ul></nav></dl><tbody id="cw2q0"></tbody><bdo id="cw2q0"></bdo><dd id="cw2q0"><th id="cw2q0"><optgroup id="cw2q0"></optgroup></th></dd><source id="cw2q0"><strong id="cw2q0"><em id="cw2q0"></em></strong></source><fieldset id="cw2q0"><table id="cw2q0"><kbd id="cw2q0"></kbd></table></fieldset><optgroup id="cw2q0"><ul id="cw2q0"><dfn id="cw2q0"></dfn></ul></optgroup><input id="cw2q0"></input><li id="cw2q0"></li><td id="cw2q0"></td><abbr id="cw2q0"></abbr><input id="cw2q0"><noscript id="cw2q0"><acronym id="cw2q0"></acronym></noscript></input><sup id="cw2q0"></sup><abbr id="cw2q0"><button id="cw2q0"><center id="cw2q0"></center></button></abbr><strong id="cw2q0"></strong><option id="cw2q0"></option><li id="cw2q0"></li><td id="cw2q0"></td><dd id="cw2q0"><dl id="cw2q0"><optgroup id="cw2q0"></optgroup></dl></dd><kbd id="cw2q0"></kbd><td id="cw2q0"><bdo id="cw2q0"><abbr id="cw2q0"></abbr></bdo></td><noframes id="cw2q0"></noframes><abbr id="cw2q0"></abbr><object id="cw2q0"></object><bdo id="cw2q0"></bdo><code id="cw2q0"></code><dl id="cw2q0"><object id="cw2q0"><abbr id="cw2q0"></abbr></object></dl><center id="cw2q0"></center><li id="cw2q0"><center id="cw2q0"><dd id="cw2q0"></dd></center></li><source id="cw2q0"><dl id="cw2q0"><em id="cw2q0"></em></dl></source><samp id="cw2q0"><th id="cw2q0"><object id="cw2q0"></object></th></samp><tr id="cw2q0"><s id="cw2q0"><small id="cw2q0"></small></s></tr><s id="cw2q0"><li id="cw2q0"><button id="cw2q0"></button></li></s></div> </html>