六西格玛在提高HFW厚壁管成材率中的应用  

Application of Six Sigma to Improving Yield of Heavy-walled HFW Pipe Production

作　　者：熊建辉[1] 肖光成[1] 沈江华[1] 

机构地区：[1]宝山钢铁股份有限公司钢管条钢事业部,上海201900

出　　处：《钢管》2013年第6期46-49,共4页Steel Pipe

摘　　要：运用六西格玛方法,通过排列图、双样本T检验、非参数检验及方差分析等工具,找到了制约Φ610 mm HFW焊管机组厚壁管成材率的症结,并从成型焊接工艺优化、内毛刺刀杆改造等方面制定和实施改进措施。通过实施改进措施,Φ610 mm HFW焊管机组厚壁管的成材率提高了14.2%,成材率西格玛水平也从改进前的0.66提高到1.23。The root cause that restrains yield of the Ф610 mm HFW pipe production line is identified by means of the Six Sigma Method containing such tools as Plato, Student＇ s T test, non-parameter test, and variance analysis. Accordingly, corrective actions are determined and taken to optimize forming and welding processes, and modify inner burr cutter bar. As a result, the yield of the said production line has been increased by 14.2%, and the yield Sigma level has been also enhanced from the original 0.66 to 1.23.

关 键 词：HFW厚壁管 成材率 六西格玛 排列图 双样本T检验 非参数检验 

分 类 号：TG335.75[金属学及工艺—金属压力加工]