Automatic welding production line for heat pipe end socket

The invention discloses an automatic welding production line for heat pipe end sockets, which comprises a straight pipe supporting and conveying platform and a welding workbench, and a straight pipe clamping and rotating mechanism and a pipe end positioning assembly are arranged on the welding workbench; a positioning air cylinder is fixed to the welding workbench, an ejector rod is installed on a piston rod of the positioning air cylinder, a connecting block is installed at the end of the ejector rod, an embedding groove is formed in the outer end face of the connecting block, an end socket positioning block is arranged in the embedding groove, and a rack is fixed to the position, at the welding station, of the welding workbench; a lifting seat is connected to the up-down adjusting screw rod, a rotating shaft is supported on the lifting seat, a connecting disc is installed on the rotating shaft, a machine head supporting frame is installed on the connecting disc through an up-down and left-right bidirectiona