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Analysis of the extrusion principle of aluminum profiles

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Update time : 2022-10-09 19:29:40
1. The principle of extrusion of aluminum profiles
Aluminum extrusion is a plastic processing method that applies external force to a metal blank placed in a container (extrusion cylinder) to flow out from a specific die hole to obtain the desired cross-sectional shape and size.
2. Composition of aluminum extrusion press
Aluminum extrusion machine consists of machine base, front column frame, tension column, extrusion cylinder, hydraulic system under electrical control, and also equipped with die base, thimble, scale plate, slide plate, etc.
3. Classification of aluminum extrusion methods
According to the type of metal in the extrusion cylinder, the state of stress and strain, the extrusion direction of the aluminum profile, the smooth state, the extrusion temperature, the extrusion speed, the type or structure of the tool, the shape or number of the billet, and the shape of the product or the number, etc., can be divided into forward extrusion method, reverse extrusion method, (including plane deformation extrusion, axisymmetric deformation extrusion, general three-dimensional deformation extrusion) lateral extrusion method, glass smooth extrusion method, hydrostatic extrusion method, successive extrusion method, etc.
4. Positive thermal deformation extrusion
Most of the hot-deformed aluminum production enterprises use the forward hot-deformation extrusion method to obtain aluminum with the required cross-sectional shape through a specific die (flat die, cone die, split die).
The forward extrusion process is simple, the equipment requirements are not high, the metal deformation capacity is high, the production range is wide, the aluminum performance is highly controllable.
The disadvantage is that there is a strong conflict between the inner and outer surfaces of the extrusion cylinder and the aluminum material, which accounts for a large proportion of the extrusion energy consumption. The extrusion speed of the alloy accelerates the wear and service life of the extrusion die, and the microstructure and properties of the product are uneven.
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