【摘要】 在大型管结构的焊接工程中 ,相交双管的装配精度及支管下料高度一直未得到很好的解决。作者依据管结构工程实际 ,运用空间解析几何的知识建立了相交双管焊接装配时 ,沿径向切割的支管与非切割的主管之间密闭准确安装的数学模型。通过对此数学模型的求解 ,导出了相交双管相贯线上各点局部二面角的计算公式 ,给出了相交双管装配接触线的参数方程 ,并解释了其数学本质。按此方程计算的接触线进行下料 ,所切支管能够保证支管与主管准确装配。更多还原

【Abstract】 In the welding engineering of large-scale pipe structures,the assembly precision and the branch pipe cutting curve of two intersecting pipes haven’t been settled for a long time.Based on the engineering practices of pipe structures,a mathematical model used for hemetially sealed intersecting assembly between radially cut branch pipe and uncut main pipe is established.By the solution of the model,a calculating formula of the local dihedral angel of intersecting line and a parametric equation of contacting line are given.At the same time,the mathematical essence is expounded.A branch pipe,practically cut,can be assembled with a main pipe accurately.更多还原