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- W2016014719 abstract "Abstract Aluminium profiles are produced by forcing the materials to flow through one or more openings in an extrusion die. Heat generated by deformation and friction will cause an increase of the temperature which may lead to serious defects and consequently increased scrap production. In addition to the initial temperatures of the billet and the container, the ram velocity and geometry will have a major influence on the profile temperature. The possibility of estimating the profile temperature as a function of these parameters before the start-up of a new production series will increase the productivity of the extrusion plant by allowing a higher extrusion speed and will also, probably, make it safer to undertake the production of profiles of more complicated form. Several attempts have been made to find theoretical or experimental techniques that give a reasonably accurate estimation of the temperature development in the extrusion of a new profile geometry, but in spite of this no simple procedure is at hand. In the present work a first step is taken to apply data from two- or three-dimensional model-material experiments as input data to a numerical simulation program. Based on deformation data from the experiments, the program calculates the temperature changes due to heat generation and transportation in different parts of the extrusion system. The calculations have so far been restricted to the extrusion of circular rods: some minor alterations will be necessary to handle planar regions of more complicated die geometries also. The use of deformation data, i.e. strains and strain rates, taken from model experiments may introduce instabilities in the calculations due to inaccurate measuring of the deformed net. To compensate for this, a procedure of automatic correction of the measurements will be necessary. The program also gives the opportunity for the user to input a mathematically defined field of strains and strain rates." @default.
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- W2016014719 date "1985-12-01" @default.
- W2016014719 modified "2023-09-27" @default.
- W2016014719 title "Model-material experiments applied in the calculation of temperature development during extrusion" @default.
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- W2016014719 doi "https://doi.org/10.1016/0378-3804(85)90135-4" @default.
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