The cold-bend forming process was studied using energy method and a theoretical length expression of the transition zone of delormation was thus derived.
采用能量法原理对冷弯变形过程进行研究与分析，建立了变形过渡区长度的理论表达式。
2
The forming principle and pass design of coldbend section steel is introduced and the deformation drawing of rail used by highway is given.
介绍了冷弯型钢的成型原理、孔型设计，并给出了高速公路用护栏板的变形图。
3
Through the analysis on production process of coldbend steel unit, the article give out reasonable strip steel deforming grape.