大直徑5機(jī)架三輥定徑機(jī)孔型的設(shè)計與開發(fā)

Design and Development of Pass of Large-sized 5-stand,3-roll Sizing Mill

摘要: 為了在大直徑5機(jī)架定徑機(jī)上實(shí)現(xiàn)共用一套孔型軋制30～100 mm壁厚大直徑鋼管的目的，提出了采用遞減分配法進(jìn)行定徑機(jī)孔型設(shè)計的理念。介紹了減徑率設(shè)計思路，鋼管熱膨脹系數(shù)測算方法，總減徑率遞減分配模式以及寬展的選擇及孔型的設(shè)計等，采用遞減分配法設(shè)計的定減徑孔型方案合理，能夠滿足30～100 mm壁厚組距薄、厚壁管一套孔型生產(chǎn)的要求。

Abstract: The idea that adopts decreasing distribution method to design the sizing mill passes is proposed in order to use one common set of passes to roll the 30~100 mm heavy wall,large-sized steel tubes with the large-sized 5-stand sizing mill.Elaborated here in the article are the main aspects of the pass design,involving the design approach with the reduction rate,the computing method for the steel pipe thermal expansion coefficient,the general reduction rate decreasing distribution mode,and broad siding determination as well as the pass design.The scheme of the sizing/reducing passes as designed with the decreasing distribution method is reasonable,being satisfactory to the requirements for manufacturing the 30~100 mm light-wall and heavy-wall pipes with one common set of passes.