Hydroforming isn't as mysterious as it seems. This technology area is full of articles, including case studies, on hydroforming sheet metal and tubular sections.
March 14, 2002
This article discusses tests that are used to evaluate flow stress in tube and why the uniaxial test is not suitable for this application. It discusses a bulge test, which stresses the tube biaxially, including tooling, software, and analysis tools for evaluating stresses.
January 24, 2002
This article examines hydroforming in Germany, focusing on the advancement of the technology. It specifically discusses growing automotive uses, a new type of hydroforming press, material quality requirements, cost factors, new testing methods, and simulation software.
January 10, 2002
The bending characteristics of a tube depend on the material it is made of. Exceeding the allowable limits of this deformation results in unusable parts. The author relates his company's examination and comparison of the bending of two different seamless, extruded tubes: aluminum alloy and steel.
November 29, 2001
T-shapes and Y-shapes are the most commonly hydroformed exhaust system components for automobiles. This article reports on the investigation into the metal flow in Y-shape hydroforming by the Engineering Research Center for Net Shape Manufacturing (ERC/NSM) at The Ohio State University, which conducted several experiments using the tooling available at the SPS research center in Aalen, Germany.
November 15, 2001
This article examines two transitions that are occurring in the automotive industry—the change from stamping to hydroforming, and the substitution of aluminum where steel was used previously.
July 12, 2001
You can use several strategies for starting a hydroforming operation on a limited budget. Review your alternatives for selecting a press, fluid intensification system, and developing the tooling necessary for your operation before you take the plunge.
June 15, 2001
A typical tube hydroforming system is shown in Figure 1. Within this system, a host of factors must be taken into account, from starting tube geometry and material properties to the quality of the final part (such as thickness distribution and dimensional accuracy).
March 5, 2001
Many factors come into play when attempting to execute a production hydroforming operation, among them material selection, friction and lubricants, tube bending and preforming, and equipment. Many companies in the automotive sector are experiencing great success with the process, which can reduce weight, overall costs, and the number of parts per vehicle.
February 19, 2001
Pressure-sequence hydroforming can form complex parts as well as forming most ductile metals, including high-strength, low-alloy, and stainless steels with sharper corners, thick-walled tube, and other difficult features.
February 19, 2001
Simulation is used in the hydroforming process to replace the experimental investigation and tests required in a real tryout process.