The invention belongs to the technical field of
welding and relates to a
welding technology for a hydraulic hard tube, in particular to an automatic
welding method for a hydraulic hard tube
assembly. By the adoption of the automatic welding method for the hydraulic hard tube
assembly, the welding ratio of automatic welding is high, and the welding quality is stable when the hydraulic hard tube
assembly is welded. According to the technical scheme, the automatic welding method for the hydraulic hard tube assembly comprises the following steps that firstly, a welding groove of a
guide tube and a welding groove of a
spherical joint in the hydraulic hard tube assembly are machined to be plain ends; secondly, the
guide tube and the
spherical joint of the hydraulic hard tube assembly generated after the first step are grouped, and the inner
diameter and the outer
diameter of the position, where the
spherical joint and the
guide tube are grouped, of the spherical joint are machined to be equal to the inner
diameter and the outer diameter of the guide tube respectively; thirdly, the guide tube and the spherical joint of the hydraulic hard tube assembly generated after the second step are in
butt joint with each other and located; fourthly,
spot welding is conducted on the guide tube and the spherical joint of the hydraulic hard tube assembly generated after the third step; fifthly, automatic welding is conducted on the guide tube and the spherical joint of the hydraulic hard tube assembly generated after the fourth step.