Computer automatic control, according to the steel grade, wall thickness, plate width automatically adjust the reduction, reduction force and steel plate feed, the upper and lower grinding tools have automatic deformation compensation function,Using the stepping JCO forming method, half of the pre-bent steel plate is gradually bent from the edge to the middle of the plate on the forming machine with the set step length and number of times, and then the other half of the steel plate is also bent to form an open "O" shaped steel pipe.

Imported full-pipe length mechanical expanding machine controlled automatically by computer. The entire length of the welded pipe is clamped and expanded, and the expanding head expands without gaps, so that the mechanical properties and straightness of the expanded welded pipe are more uniform. While eliminating the forming stress and welding stress, the tolerance of diameter, roundness and straightness meets customer requirements.

It is composed of American Lincoln digital welding machine, automatic welding seam laser tracking system, flux conveying and recycling system, television monitoring system and digital control system. The workpiece is moved by the trolley and the welding head is fixed for welding. The digital welding machine realizes that the welding characteristic curve can be adjusted as required, and the welding coefficient is automatically recorded and stored and traceable.

It has the functions of automatic centering of steel plate and automatic copying and floating of milling edges. The milling speed and milling amount are automatically set according to the steel grade, wall thickness, groove shape and size. The computer automatically controls both sides of the steel plate to mill the required plate width and edge flatness, and the groove required for welding.