简介:Theappliedconditionsofstudweldingononbodyofautomobile,andthecurrentwaveformsandsequencecon-troltechniqueswhicharesettomeetthequalityofstudweldingincarbody,areintroducedinthispaper.Therealiz-ingmethodofcurrentwaveformsandsequencecontrolbasedonmicroprocessorarealsodiscussedindetail,Thewaveformsofoutputweldingcurrentandvoltagearemeasured.Itisprovedthatthetechniquesincludingcurrentwaveforms&se-quencecontrolcansuccessfullymeetthedemandofautomobilestudwelding.
简介:ThesoftwareofSYSWELDwasusedtobuildmodelandsimulatethermalcycleofin-serviceweldingontoactivegaspipeline.Influenceofpipediameter,wallthicknessandheatinputonthermalcyclewasstudied.Theresultsshowthatt8/5,t8/3andpeaktemperatureofinnersurfacedecreasewhenwallthicknessincreasesfrom5mmto12mm.Butt8/1willincreaseswiththeincreaseofwallthicknessandwilldecreaseafterthewallthicknessislargerthan7mm.Pipediameterhaslittleinfluenceonthermalcycleandthatinfluencecanbeignoredwhenpipediameterisgreaterthan273mm.t8/5,t8/3,t8/1andpeaktemperatureofinnersurfacewillincreasewiththeincreaseofheatinput.
简介:克瑞能源流体解决方案公司(CraneEnergyFlowSolutions)已购买了科隆巴赫集团的全部股本。基于德国Kreuztal的该公司全球有640名雇员,2008年的销售额估计九千一百万美元。收购包括在斯洛文尼亚的制造和铸造厂和在中国的一个合资公司的所有权。