By Pradip Saha
Offers a accomplished creation to the explosion of knowledge that has turn into to be had within the box of aluminum extrusion expertise over the past fifteen or two decades. DLC: Aluminum--Extrusion.
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Additional info for Aluminum extrusion technology
Specific pressure (inner pressure in the container liner) as shown in Fig. 20 is given by: Fp Ps = A C (Eq 37) Effect of Principal Variables on Extrusion Extrusion can become impossible or can yield an unsatisfactory product when the load required exceeds the capacity of the press available or when the temperature of the extrusion exceeds the solidus temperature of the alloy. Knowledge of the initial billet temperature, the strain-rate, flow stress of the working material, and the extrusion ratio are required if correct and economical use is to be made of expensive extrusion facilities.
F. Castle, Temperature Changes in the Extrusion of Aluminum Alloys, Proc. Third International Aluminum Extrusion Technology Seminar, Vol 1, Aluminum Association and Aluminum Extruders Council, 1984 20. M. Lefstad, Die Temperatures in Aluminum Extrusions, Proc. Fourth International Aluminum Extrusion Technology Seminar, Vol 2, Aluminum Association and Aluminum Extruders Council, 1988 21. R. Barron, Non-Contact Temperature Measurement of Aluminum: Its Design Performance and Function for Aluminum Extrusion, Proc.
The changes during extrusion depend on the billet Fig. 21 Principal extrusion variables Fundamentals of Extrusion / 25 temperature, the heat transfer from the billet to the container, and the heat developed by deformation and friction. In actual aluminum extrusion practice, very complex thermal changes commence as soon as the hot billet is loaded into the usually preheated container, and extrusion is started. Temperature rise and temperature distribution during extrusion have been investigated by many researchers (Ref 10, 11, 16, and 19–23).
Aluminum extrusion technology by Pradip Saha