The application feasibility of hydroforming in frame longeron large parts is verified for the first time at home. The result of the research on the structure design and process analysis for frame longeron shows that hydroforming can be fully realized.With stiffness is comparison,collision test simulation and cross section force with traditional drawingassembly welding techniques,it has been found that hydroforming combining has multiple advantages such as lightweight, high stiffness,reduction in the number of parts,high precision,hence reduction the associated machining and welding and so on.It is especially suitable for forming various lightweight components used for the chassis parts in automotive.

管液压成形（THF）是轻量化成形加工的典型加工技术。它作为1994年开始起动的ULSAB计划，通过积极引入运输设备而进入活跃的开发期。近年，不仅在加工工艺和加工机械方面，而且在坯料的应用开发方面，都进入了综合研究和新的拓展期。

0引言液压泵和伺服电机组合使用是一种高效和高动态响应的解决方案。压缸制造商Lasco将这种伺服电泵驱动应用于体积成形和板材成形加工。“该驱动系统带来了出乎意料的好处”，Harald Barnickel（工程硕士，压缸制造商Lasco位于科堡的金属技术成形有限责任公司电气工程部经理）说道。