@inproceedings{eprints3352,
       publisher = {International Association of Engineers},
          author = {Mutiu F. Erinosho and Saheed Olalekan Ojo and Joseph S. Ajiboye and Esther T. Akinlabi},
           title = {Effect of Punch Diameters on Shear Extrusion of 6063 Aluminium Alloy},
       booktitle = {Proceedings of the World Congress on Engineering 2015. Vol. II},
            year = {2015},
           pages = {1240--1242},
             url = {http://eprints.imtlucca.it/3352/},
        abstract = {This paper reports the effect of punch diameters on the
shear extrusion of 6063 Aluminium alloy. During the shear extrusion
process, Aluminium billets of considerable diameter 30 mm and
height 25 mm were inserted in a die hole and different punches of
diameter 12 mm, 14 mm, 16 mm and 18 mm respectively were
allowed to come in contact to perform the shear operation. The setup
took place under a hydraulic press with maximum capacity of 600
kN. This work is aimed at studying the selection of the optimum
punch diameter for shear extrusion using local groundnut oil as the
lubricant. Different extrusion pressures were measured and the punch
with a diameter of 18 mm gives the highest load of 77.7 kN while the
punch with a diameter of 12 mm gives the lowest load of 51.2 kN.
An indication shows that, an increase in the punch diameters led to
an increase in the height of the extrudates and this in turn reduces the
stress induced}
}