<P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 18pt; TEXT-INDENT: -18pt; TEXT-ALIGN: left; tab-stops: 18.0pt; mso-pagination: widow-orphan" align=left><SPAN style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.0pt">．工作原理： <SPAN lang=EN-US><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan" align=left><SPAN lang=EN-US style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.0pt"><SPAN style="mso-spacerun: yes">&nbsp;&nbsp;&nbsp; </SPAN></SPAN><SPAN style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.0pt">模具修补冷焊机的原理是，利用充电电容，以<SPAN lang=EN-US>10</SPAN>－</SPAN><SPAN style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ansi-language: #0400; mso-fareast-language: #0400; mso-bidi-font-size: 10.0pt">3</SPAN><SPAN style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.0pt">～<SPAN lang=EN-US>10</SPAN>–</SPAN><SPAN style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ansi-language: #0400; mso-fareast-language: #0400; mso-bidi-font-size: 10.0pt">1</SPAN><SPAN style="FONT-SIZE: 12pt; COLOR: black; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.0pt">秒的周期，<SPAN lang=EN-US>10</SPAN>－<SPAN lang=EN-US>6</SPAN>～<SPAN lang=EN-US>10</SPAN>–<SPAN lang=EN-US>5</SPAN>秒的超短时间放电。电极材料与模具接触部位会被加热到<SPAN lang=EN-US>8000</SPAN>～<?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="25000" UnitName="?C"><SPAN lang=EN-US>25000</SPAN>°<SPAN lang=EN-US>C</SPAN></st1:chmetcnv>，等离子化状态的熔融金属以冶金的方式过渡到工件的表层。图<SPAN lang=EN-US>1</SPAN>所示的是（堆焊，涂层）的示意图及各种特性。<SPAN lang=EN-US>A</SPAN>区是堆焊到工件表面的涂层或堆焊层，由于与母材之间产生了合金化作用，向工件内部扩散，熔渗，形成了扩散层<SPAN lang=EN-US>B</SPAN>，得到了高强度的结合<SPAN lang=EN-US>.<o:p></o:p></SPAN></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 18pt"><SPAN lang=EN-US style="FONT-SIZE: 12pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.0pt">2</SPAN><SPAN style="FONT-SIZE: 12pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.0pt">．<SPAN lang=EN-US>&nbsp;&nbsp; </SPAN>实现冷焊（热输入低）<SPAN lang=EN-US><SPAN style="mso-spacerun: yes">&nbsp; </SPAN></SPAN></SPAN><SPAN style="FONT-SIZE: 12pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.0pt">为什么能实现冷焊呢，如图<SPAN lang=EN-US>2</SPAN>所示，放电时间（<SPAN lang=EN-US>Pt</SPAN>）与下一次放电间隔时间（<SPAN lang=EN-US>It</SPAN>）相比极短，机器有足够的相对停止时间，热量会通过模具基本体扩散到外界，因此模具的被加工部位不会有热量的聚集。虽然模具的升温几乎停留在室温，可是由于瞬时熔化的原因，电极尖端的温度可以达到<st1:chmetcnv w:st="on" TCSC="0" NumberType="1" Negative="False" HasSpace="False" SourceValue="25000" UnitName="?C"><SPAN lang=EN-US>25000</SPAN>°<SPAN lang=EN-US>C</SPAN></st1:chmetcnv>左右。</SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 18pt"><SPAN style="FONT-SIZE: 12pt; COLOR: #333333; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-bidi-font-size: 10.0pt"></SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-fareast-font-family: ''Times New Roman''; mso-bidi-font-size: 10.0pt"><SPAN style="mso-list: Ignore"><FONT face="Times New Roman">3．</FONT></SPAN></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''; mso-bidi-font-size: 10.0pt">结合强度高：</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><o:p></o:p></SPAN></P> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt 17.95pt; TEXT-INDENT: 30pt; mso-char-indent-count: 2.5; mso-para-margin-left: 1.71gd"><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''; mso-bidi-font-size: 10.0pt">利用模具修补冷焊机进行修补堆焊时，即然热输入低，为什么结合强度还很大呢？这是因为焊条瞬间产生金属熔滴，过渡到与母材金属的接触部位，同时由于等离子电弧的高温作用，表层深处开成像生了根一样的强固的扩散层（如图</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><FONT face="Times New Roman">1</FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''; mso-bidi-font-size: 10.0pt">中的</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><FONT face="Times New Roman">B</FONT></SPAN><SPAN style="FONT-SIZE: 12pt; FONT-FAMILY: 宋体; mso-ascii-font-family: ''Times New Roman''; mso-hansi-font-family: ''Times New Roman''; mso-bidi-font-size: 10.0pt">所示）。呈现出高结合性，不会脱落。</SPAN><SPAN lang=EN-US style="FONT-SIZE: 12pt; mso-bidi-font-size: 10.0pt"><o:p></o:p></SPAN></P>