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

Abstract 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.