Single-ingot power frequency heating furnace

Abstract

The invention relates to a single-ingot power frequency heating furnace which comprises a furnace rack, a furnace lining, an induction body and a magnet yoke, wherein the furnace rack comprises an upper supporting body and a lower supporting body; the induction body wound by a hollow copper tube surrounds the excircle of the furnace lining into a whole; the upper supporting body and the lower supporting body are combined and locked to ensure that the magnet yoke in the upper supporting body and the magnet yoke in the lower supporting body form opposite clamping to the induction body; the induction body consists of a plurality of independent inducing coil sections which are arrayed along the axial direction, and each inducing coil section is singly connected with a power supply; and each inducing coil section consists of a plurality of inducing coil units which are connected in series along the axial direction. Each inducing coil section can be applied with different power densities to generate an axial temperature gradient on an aluminum bar so as to realize stepless power regulation (the heating temperature can be arbitrarily set), achieve dynamic and static heating and meet the requirement of isothermal extrusion.

Description

technical field [0001] The invention relates to an induction heating furnace, in particular to a single ingot power frequency heating furnace. Background technique [0002] During the direct extrusion process of aluminum alloy, due to the relative movement between the billet and the extrusion cylinder, frictional heat will be generated on the surface of the billet. If the billet entry temperature is constant along its length and the extrusion rod speed remains constant during extrusion, the volume element of the billet will enter the deformation zone at a higher temperature because the friction zone becomes longer and longer. Consequently, the exit temperature of the profile will be different at the beginning and end of extrusion, resulting in differences in properties (such as strength, elongation, and surface quality) along the length of the profile. This difference in performance is very unfavorable for the impact of industrial profiles and large-section profiles for rai...

AI Technical Summary

Problems solved by technology

As a result, the exit temperature of the profile will be different at the beginning and end of extrusion, resulting in differences in properties (such as strength, elongation, and surface quality) along the length of the profile

This difference in performance is very unfavorable for industrial profiles and large-section rail transit profiles.

In order to eliminate adverse effects, the traditional method is to reduce the extrusion speed, but this reduces the capacity of the press and reduces the output

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