The Sheet Metal Parts (XINGHUI) forming process uses liquid as pressure medium instead of conventional punch to form the part into the desired shape of the die. The first available literature about the process dates back to as early as 1939 by Grey et al. for the fabrication of seamless metal T and X branches of copper tubes. Its application has increased dramatically since the 1990s in many industrial fields, especially in the automotive industries, following a large number of research programs and extensive practical experience.
This process is capable of forming complex geometries with concavities in one step, which would be difficult or impossible with conventional forming processes and would otherwise be made from multiple stamping parts joined together. It provides remarkable weight savings due to the elimination of flanges required for welding and using thinner metals. Hydroforming is currently used widely in industries such as the automotive industry, where the complex geometries that can be produced by this method are used to make stronger, lighter and more rigid structures for vehicles. The process is particularly popular with the high-end sports car industry and is also frequently used in the making of bicycle frames. It is also widely used for making medical and health equipment, sports equipment and furniture. Marine and defense industries, decorative construction and plumbing and fixture products can take advantage of the multi-material capability and extensive design freedom.
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