15-06-2012, 03:59 PM
FUNDAMENTALS AND INDUSTRIAL APPLICATIONS Of HYDROFORMING
Hydro forming.ppt (Size: 1.14 MB / Downloads: 60)
INTRODUCTION
Tube hydroforming has been well-known since the 1950s
The demand for weight reduction in modern vehicle construction has led to an increase in the application of hydroforming processes for the manufacture of automotive lightweight components made from steel (H.S.S) or aluminium.
Hydroform processes a general distinction is to be drawn between forming of
Tubular material and
Forming of sheet material.
The basic elements of tubular hydroforming
Many factors come into play when attempting to execute a production hydroforming operation, among them important are
Material selection(Tube Material & Formability)
Friction and Lubricants
Tube bending and Preforming
and Equipment
Types of Hydroforming
There are four main types of hydroforming:
Hydroforming of tubes, usually at low pressure, is the most widely used technology at present, with hydroformed tubular parts offering improved integrity and structural performance.
Low pressure hydroforming simply re-shapes tubes, producing a very good shape, but is not as useful if better cross-section definition is required.
High-pressure hydroforming, totally changes the tube shape and alters the length to circumference ratio by up to 50%. It gives very good tolerance control, being a highly robust process.
Panel hydroforming at high pressures is used in the aerospace industry, and is expected to be used for applications in the automotive industry in which hydroforming is needed to get the right material flow.