ABC’S OF VARI-FORM

“The ABC’s of Hydroforming” provides useful information about the hydroforming process and its applications.
Get a PDF version of “The ABC’s of Hydroforming”.

VARI-FORM VS. STAMPED

Compare PSH assemblies with stamped assemblies – by number of components, total mass, and dollar investment.
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FREQUENTLY ASKED QUESTIONS

Q- How is Pressure-Sequence Hydroforming (PSH) different from traditional High Pressure Hydroforming (HPH)?
Q- What is Pressure-Sequence Hydroforming?
Q- Can holes be pierced during hydroforming?
Q- What is the typical process cycle time?
Q- What materials can be formed using Pressure-Sequence Hydroforming?
Q- What internal pressure does the Pressure-Sequence Hydroforming process use?
Q- What size of tube can be hydroformed?
Q- What wall thickness of tube can be hydroformed?
Q- Does Pressure-Sequence Hydroforming expand the tube?
Q- Is the tube lubricated before hydroforming, and if so what lubricant is used?
Q- Does Pressure-Sequence Hydroforming use axial end feeding to counteract tube wall thinning in the hydroform die?
Q- Can Pressure-Sequence Hydroforming (PSH) expand the tube?
Q- Can Pressure-Sequence Hydroforming (PSH) form a tight cross section corner?
Q- Is the tube wall thinned in the area of cross section corner?
 

Q- Most hydroformed tubes are made using ERW (welded) tubing, does the weld seam present any issues with hydroforming?
Q- What advantages do hydroformed tubes offer over traditional stamped and welded assemblies?
Q- What production volume is needed to support a business case for hydroforming?
Q- What tolerances can Pressure-Sequence Hydroforming hold?
Q- Does the process employ heat?
Q- Is the fluid that is used to pressurize the tube recycled?
Q- How long does it take to make engineering changes to a hydroform tool?
Q- Are there ways to provide local reinforcement?
Q- Once the production tool is built, can you change the wall thickness and or the strength of the starting tube?
Q- What fasteners can be used in a hydroformed tube?
Q- Stampings generally have flanges for spot welding to other components, does hydroforming have something comparable?
Q- What type of welding is used to produce assemblies?
Q- Is it possible to simulate the PSH process?