国内制造自行车前叉腿除了落料、冲弯成形、焊缝、冲切和压扁成件外,大量生产常采用11道到13道轧辊滚轧成型、压扁冲切成件。滚轧能达到简化工序和优质高产。轧辊圆周上槽形设计又分半圆形和半圆弧形之分。前者经每道轧辊的管坯均为圆形,而 In addition to blanking, punching, welding, punching and squashing, domestic production of bicycle fork legs often uses 11 to 13 rolls for roll forming and flattening. Rolling can achieve simplified processes and high quality and high output. The groove design on the circumference of the roll is divided into semi-circular and semi-circular arc shapes. The former through each roll of billet is round, and