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Tube Hydroforming: Part Two :: Total Materia Article
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Tube Hydroforming: Part Two
Te hydroformed part takes on te shape of te die and finally te hydroformed part can be removed.
When used with high strength steels hydroforming is able to produce structurally superior parts with thinner sections at a reduced mass.
Tube Hydroforming is a well-accepted production technology in te automotive industry while sheet hydroforming is used in selected cases for prototyping and low volume production. Research in advanced methods (warm sheet and tube hydroforming, double blank sheet hydroforming, combination of hydroforming and mechanical sizing, use of multi-point and elastic blank holders) is expanding te capabilities of hydroforming technologies to produce parts from Al and Mg alloys, as well as Ultra High Strength Steels.
A simplified overview of te hydroform process:
Raw tube is loaded into hydroforming dies → Hydroforming press closes → Te sealing rods engage te part, seal te ends and fill it with water → Pressure inside te part increases → Te sealing rods push te tube into te die (endfeed) and te internal pressure is ramped to its maximum value.
Te hydroformed part takes on te shape of te die and finally te hydroformed part can be removed.
Figure 1 shows te steps of te hydroforming process,.whilst Figure 2 shows te same tube after hydroforming.
Figure 1: Te steps of te hydroforming process
Figure 2: Te tubes after hydroforming process
This method provides te following unique benefits compared to conventional technology:
Higher precision of te part
Complex parts produced in one single tool
Increased possibilities for product design
Low weight due to reduced volume of material
Higher structural strength of te part
Part integration and reduced part costs
Integration of piercing and/or punching operations
Elimination of pinch weld flange
Improvements to dimensional repeatability
When used with high strength steels hydroforming is able to produce structurally superior parts with thinner sections at a reduced mass.
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Tube Hydroforming: Part One
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