管道弯头环形变角度焊接坡口的设计方法

A Cutting Method for the Changeable Angle of a Grooved Facein a Welding Bend of Pipeline

针对管道焊接弯头虾米节间的环形焊接坡口面现行定角度切割方法存在的问题，提出使弯头组装后各节间形成的环焊缝夹角相等的焊接坡口面变角度切割方法，导出了可供数控切割的数学模型，并就其经济效益进行了分析。

A new cutting method for changeable angle a grooved faces is put forward to solve the problem existing in the present method for fixed angle where annular welding grooved faces are between shrimp joints of pipeline.The method is capable of forming intersecting angle of annular welding seam after bendingsub assembly to be equal.A mathematical model is derived for numerical control of cutting devices,and the economic benefit from the method is analysed.