The technical advantages of forming rollers for high frequency resistance welded pipe (erw steel pipe) are as follows:


(1) Reduce the number of rough rolling forming, reduce the cost of roll and roll replacement time. Roller row forming technology of raw material forming machine is generally composed of two horizontal rollers. There are many inner and outer rollers for all pipe sizes in the product range. The first rack roll usually has only one set, but you need several sets to roll and roll in the second frame. Compared with the number of rolls, the roll forming machine has been reduced, so the investment has been reduced.


(2) Improving the quality of pipelines. By replacing the large diameter horizontal roll of roll forming machine with several small diameter discharge rolls, the speed difference of roll surface is reduced, the stretching effect of steel edge is improved, and the quality of tube side is improved.


(3) Reduce roll change time and improve productivity. Rough rolls and rolls have several inner rows, but it is necessary not to change the diameter of each roll to replace the tube. Precision machines and sizing machines are widely used in rigid frames and quick-change devices. Roller change time is greatly shortened, from the previous level of 1 to 2 tens of minutes. Roller changing time is shortened and output is increased. Roller row forming technology is not only popularized in the production of diameter pipe, but also popularized in the production of small diameter pipe. It can be said that after the mid-1980s, it is a period of development of roll forming technology.