An online welded pipe thread rolling devic
e is disposed between an eight-roll straightening machine and a fixed-length flying saw of a welded pipe production line, comprising: a gear transmission box fixed on the base, a rolling cylinder installed above the gear transmission box, and a side of the base The bracket, the support provided on the bracket, and the guide frame, the inner groove-shaped guide plate, the link mechanism, the hollow shaft with the flange, the turntable connecting member with the through hole and the rolling mechanism, characterized in that: the gear The input shaft of the transmission box is externally connected to the pulley, and the output shaft is coupled to the hollow shaft through the gear mesh; one end of the turntable connecting member is fixedly connected with the flange on the hollow shaft through the bolt, and the other end is provided with at least two "T" in the diameter direction. a chute, which is fitted with a "T" shaped slider corresponding to the rolling mechanism, and a stopper is arranged on the outer sides of the "T" shaped chute;
The long arm of the guide frame is movably connected with the cylinder shaft joint of the axial end of the rolling cylinder, and the short arm is movably connected with the support on the bracket; the inner groove of the guide frame is provided with a groove-shaped guide disc through the connecting shaft and the concave The trough guide disc is movably connected; the inner circle of the inner groove-shaped guide disc is fixedly connected with the turntable connecting member through a flat key; at least two link mechanisms are provided, and the link mechanism comprises a two-hole connecting piece and a three-hole connecting piece. One end of the two-hole connecting piece is movably connected with the ear piece provided on the side of the inner groove-shaped guiding plate, and the other end is hinged with one end of the three-hole connecting piece, and the middle hole of the three-hole connecting piece passes through the pin pin and the turntable connecting piece pin seat. The pin hole is connected with a waist-shaped hole at the end, and is movably connected to the pin hole provided on the end slider of the rolling mechanism through the pin.