Stretch Forming Aluminum Extrusions

Extrusion stretch forming machines.

Stretch forming aluminum extrusions.

Stretch forming during stretch forming an extrusion is placed along a rounded fixed bending die and clamped in place on each end. Stretch formed parts provide better shape control and surface quality than rolled or drawn parts. Southern stretch forming started in 1991 and has developed many proprietary procedures for curving metal. The machine begins to swing the clamped ends downward to angles up to 180 degrees and the extrusion is bent around the die to reach the desired form.

They eliminate steps in the manufacturing process by stretching the metal beyond its elastic limits and wrapping it around the die they minimize imperfections and they improve the overall structural integrity of the material. There are 5 bending and stretch forming methods for aluminum extrusion. Aluminum is generally fairly soft and ductile. Stretch forming of aluminium is the most accurate repeatable and quickest of the forming processes.

The stretch forming process subjects a metal blank to both plastic and elastic deformation. Stretch forming machines for extrusions offer all of the same advantages of sheet stretch wrap forming. There are a number of benefits to this process in particular greater control of accuracy. Stretch forming equipment produces complex shapes by stretching a metal sheet plate or extrusion over a form die.

Ram bending rotary draw and so on. The bend radius is unlimited with this method. Bend stretch forming is a cold forming operation used to bend initially straight aluminum extrusions. During the stretch forming or wrap forming process metal sheets or extrusions are stretched and wrapped around contoured dies and profiles to create the desired shape.

Beckwood s triform stretch forming machines are ideal for aerospace applications.