开发中的冷弯成形新技术

冷弯成形具有成本低、可加工复杂截面的型材等优点,所成形的冷弯件在汽车、家具和建筑等领域的应用逐年增长。近年来,随着汽车行业对工件轻量化和安全性要求的不断提高,具有独特的高生产效率、高成材率优点的改进冷弯成形新工艺应运而生。本文主要介绍了最新研究的5种冷弯成形工艺,包括三维成形技术、非等厚辊弯成形技术、分枝辊弯成形技术、局部加热成形技术、热辊弯成形技术。前3种新冷弯成形工艺充分利用冷弯成形中逐道次成形的工艺特点,丰富了冷弯件的截面形状,打破了冷弯件的等截面、等厚度的固有概念。剩下两种新冷弯成形工艺直接改变了冷弯成形工艺在常温下成形的传统概念,使高强钢材料在冷弯成形工艺中应用范围扩大。

New technology development of cold roll forming

Due to the advantages of low cost and the products with complex cross section,roll-formed parts are widely used in the automotive,furniture,construction and other industries.In recent years,automotive industries are interested in enhancing the lightweight and safety of parts,roll forming process is logical process to be improved as unique advantage of high efficiency and high material utilization.Five advanced roll forming processes were introduced including 3D roll forming,linear flow splitting,tailor roll forming,partially heated roll forming and hot roll forming.The characteristics of gradually forming in roll forming process are used in the former three technologies,which enrich the section shape of cold roll-formed parts,break out the inherent in the concept of roll forming,such as the uniform thickness and the uniform section.The remaining two new roll forming processes directly change the traditional concept that forming at room temperature,expand the application range of high-strength steel in roll forming process.