Hydroforming processes of metal tubes and sheets are being widely applied in manufacturing because the increasing demand for lightweight parts sectors such as automobile, aerospace, ship-building industries [...]

The hydroforming technology can realize overall forming of large storage tank’s bottom, but the quality is affected by many technological parameters. In view wrinkling and cracking defects integral bottom in hydroforming, a multi-objective optimization model established for process parameters including pre-expansion pressure, hydraulic blank holder force, fillet radius holder. Based on finite e...

For the purpose of eliminating annular welding seams in structures with differential thickness, a hydroforming method using circular 5A06 aluminum alloy plate radial thickness coupling flexible polyurethane auxiliary was proposed to form an integrated semi-ellipsoid shell. The had smaller middle and larger periphery. In forming process such plates, concentrated deformation fracture might have o...

Abstract Hydroformed parts are widely used in industrial automotive because of their higher stiffness and fatigue strength reduced weight relative to corresponding cast welded parts. This paper reports a hydraulic-forming experimental platform for rectangular tube fittings that was constructed conduct an experiment on the hydraulic forming fittings. A finite element model established basis flui...

Purpose: of this paper: The paper presents some results of extensive investigation of steel seam-welded tubes forming process, by applying combined treatment of material narrowing and expansion. The objective of executed numerical FE and experimental investigations was to determine the optimal technology for production of tubular product at simple tools and at the standard forming processing ma...