Hydroforming of welded and seamless tubes

Abstract

The process of plastic forming of metals and alloys has a significant place in machine engineering industry and can be conducted using conventional and unconventional techniques and methods. Tubes are frequently used elements in mechanical engineering, as part of certain constructions, which are intended to transfer a variety of fluids. Seamless tubes are significant in transferring fluid with high pressure, while the fluid with a bit lower pressure are transferred using welded tubes. Opinions that were valid until recently, and which were based on experience, state that the choice of technology in tube production has an impact on the further process of forming the tube by a deformation. The paper presents the experimental analysis of hydroforming of welded and seamless tubes, with the aim of determining the value of the necessary working pressure of fluid for hydroforming a T-shape.