Measurement of pressure distribution on die surface and deformation of extrusion die in hot extrusion of 1050 aluminum rod

In this report, the pressure on the extrusion die surface in a rod (diameter=32 mm, extrusion ratio=10 and billet diameter=100 mm) of 1050 aluminum extrusion is measured at a position 27–45 mm from the die center using the semiconductor-strain-gauge-type pressure sensor available on the market. In addition, the deformation of extrusion die in a rod of 1050 aluminum extrusion is measured by using the laser-displacement-meter, and the relationship of the pressure distribution and the deformation of extrusion die is investigated. The pressure on the die surface decreases or becomes constant at a central region in a position about 30 mm from the die center where the pressure is highest, also the pressure decreases as a measurement position approaches the container wall. The total deflection of the extrusion die gradually increased with increasing the ram stroke.