液压成型双金属复合管复合参数的研究

Study on Cladding Parameters of Hydraulically-formed Bimetallic Composite Pipe

介绍了双金属复合管的主要生产工艺。重点研究了液压成型双金属复合管的成型原理,给出了成型压力、衬管尺寸的计算公式。分析了影响衬管长度的主要因素,并通过实例分析了衬管的尺寸变化情况。分析认为:衬管复合后长度会缩短,衬管原始长度和径壁比是影响复合后最终长度的主要因素;衬管复合后长度的计算值与实测值基本相符,计算值比实际缩短量稍大。

Elaborated here in the paper are the main manufacturing processes for the bimetallic composite pipe.The formation principle of the hydraulically-formed bimetallic composite pipe is studied as the focus,and the formulas for the forming pressure and the liner tube dimensions are presented.Moreover the key factors as affecting the length of the liner pipe are analyzed.The variation of the liner pipe dimensions are also analyzed via relevant actual cases.It is revealed via the analysis that after being clad,the length of the liner pipe is shortened,and the original length and D/S of the liner pipe act as the main factors affecting the after-cladding final length;and that the calculated value of the after-cladding length of the liner pipe is basically in compliance with that of the measured value,which means that the former is slightly bigger than the actual shortening amount.