焊机

小直径厚壁管焊缝热影响区过宽的问题处理

发布时间:2023/1/23 0:07:23   
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在高频感应焊接过程中,特别是在生产厚壁小管径的产品时,例如1英寸及以下的小管道,壁厚较厚,通常我们会在焊缝处遇到特别宽的热影响区,超过管径弧面的1/3,甚至超过管径弧面的1/2,如果管径较小,甚至会出现整管通红的现象,对部分产品的最终焊接性能要求产生不利影响,甚至导致废品产生。

Intheprocessofhigh-frequencyinductionwelding,especiallyintheproductionofproductswiththickwallandsmalldiameter,suchassmallpipesof1inchandbelow,thewallthicknessisrelativelythick.Generally,wewillencounteraparticularlywideheataffectedzoneattheweld,exceeding1/3ofthepipediameterarcsurface,oreven1/2ofthepipediameterarcsurface.Ifthepipediameterissmall,thewholepipewilleventurnred,Itwilladverselyaffectthefinalweldingperformancerequirementsofsomeproducts,andevenleadtowasteproducts.

如何应对上述情况,通常我们可以采取以下措施:

Howtodealwiththeabovesituation,wecanusuallytakethefollowingmeasures:

1.提高高频设备运行的焊接频率,我们在明确产品需求时,对设备额定频率的选择上我们就要针对设备有所要求。

1.Improvetheweldingfrequencyofhigh-frequencyequipment.Whenweclarifytheproductrequirements,weshouldhaverequirementsfortheselectionofequipmentratedfrequency.

2.使用的感应线圈配合阻抗器的应用,选择合理的阻抗器规格。

2.Theinductioncoilusedshallbematchedwiththeapplicationoftheimpedance,andthereasonablespecificationoftheimpedanceshallbeselected.

3.采用导磁体设计的线圈避开了磁路,保障了磁场有效作用在焊缝上。

3.Thecoildesignedwithconductivemagnetavoidsthemagneticcircuitandensurestheeffectiveactionofthemagneticfieldontheweld.

4.提高高频焊机焊接速度,加快生产速度,限制热扩散时间。

4.Improvetheweldingspeedofhigh-frequencywelder,speeduptheproductionspeedandlimittheheatdiffusiontime.

5.准确选择线圈样式,调整线圈缠绕材料宽度,科学合理选择铜管规格,减少线圈加热长度。

5.Accuratelyselectthecoilstyle,adjustthewindingmaterialwidthofthecoil,scientificallyandreasonablyselectthecopperpipespecification,andreducetheheatinglengthofthecoil.

6.在打火的火花量允许的情况下尽量将开口角减小。

6.Reducetheopeningangleasmuchaspossiblewhenthesparkamountofignitionallows.

管材利用高频焊接的产品,当管径很小,特别是管径小于1/2,壁厚很薄,且壁厚1毫米时,钢带在过高频感应线圈后进入挤压棍的过程中,有时候会遇到三角区的两侧边部钢带无法对口挤压的现象,即两侧边部错位我们称其为挫边。

Highfrequencyweldingproductsareusedforpipes.Whenthepipediameterisverysmall,especiallywhenthepipediameterislessthan1/2,thewallthicknessisverythin,andthewallthicknessis1mm,whenthesteelstripenterstheextrusionrodafterpassingthroughthehigh-frequencyinductioncoil,itsometimesencountersthephenomenonthatthesteelstripsonbothsidesofthetriangularareacannotbeextruded,thatis,theedgesonbothsidesaremisaligned,whichwecallitflanging.

出现这种现象的原因:

Reasonsforthisphenomenon:

1.管材规格壁厚过薄;

1.Thepipespecificationandwallthicknessaretoothin;

2.小管径原材料整体抗扭强度不高;

2.Theoveralltorsionalstrengthofsmalldiameterrawmaterialsisnothigh;

3.高速焊接过程中速度较高;

3.Highspeedduringhigh-speedwelding;

这些原因是高频焊接过程中出现挫边现象的客观因素。

Thesereasonsaretheobjectivefactorsofedgeflangingintheprocessofhighfrequencywelding.

如何避免这种现象?建议采取以下措施:

Howtoavoidthisphenomenon?Thefollowingmeasuresarere

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