Tabiiy qoliplash usuli: Tabiiy qoliplash usuli rulon shakllantirish usuli (CFE) deb ham ataladi. Ushbu qoliplash usulining xususiyatlari shundan iboratki, shakllantirish jarayonida rulon guruhi chekka kengaytmani boshqarish uchun vertikal bog'lash qirrasi bo'ylab tuzilgan. Shu bilan birga, rulonli guruhlar tashqi tomondan cheklanadi.
Extend the edge as a compressed deformation form to absorb, so that the forming process of the tanded steel is close to the forming method of natural bending shape. Therefore, it is a forming method that can prevent the edge extension and absorb marginal extension, which is suitable for the inhabitant medium -caliber thin wall tube (D>400 mm).
