Hydroforming is a relatively new metal forming process with many advantages over traditional cold forming processes including the ability to create more complicated components with fewer operations. For certain geometries, hydroforming technology permits the creation of parts that are lighter weight, have stiffer properties, are cheaper to produce and can be manufactured from fewer blanks which produces less material waste. This paper provides a detailed survey of the hydroforming literature of both established and emerging processes in a single taxonomy. Recently reported innovations in hydroforming processes (which are incorporated in the taxonomy) are also detailed and classified in terms of “technology readiness level”. The paper concludes with a discussion on the future of hydroforming including the current state of the art techniques, the research directions, and the process advantages to make predictions about emerging hydroforming technologies.

液压成型是一种相对较新的金属成型工艺，与传统的冷成型工艺相比，具有许多优势，包括能够以更少的操作来制造更复杂的组件。对于某些几何形状，液压成形技术允许制造重量更轻，性能更硬，制造更便宜的零件，并且可以用更少的坯料制造零件，从而减少材料浪费。本文对单个分类法中既有工艺和新兴工艺的液压成形文献进行了详细的调查。最近报道的液压成形工艺的创新（已纳入分类法中）也按“技术准备水平”进行了详细分类。本文最后讨论了液压成形的未来，包括当前的最新技术，