Single-ingot power frequency heating furnace

A heating furnace and single ingot technology, applied in heat treatment furnaces, furnaces, furnace types, etc., can solve the problems of performance differences, elongation and surface quality, different profile outlet temperatures, and the ability to reduce presses, etc., to achieve accurate temperature gradient curves , Heating temperature is uniform, satisfying the effect of isothermal extrusion

Inactive Publication Date: 2011-01-19
苏州工业园区华福科技有限公司
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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

Method used

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  • Single-ingot power frequency heating furnace
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Embodiment Construction

[0029] Induction heating is a direct electric heating method that uses the electromagnetic alternating magnetic field of the coil for energy conversion. The coil with circular flow direction will be concentrated and encapsulated by the heated workpiece, which is equivalent to the principle of transformer. That is to say, a secondary coil is penetrated by the bundle of force lines (magnetic field lines) of the primary coil which varies over time. The primary coil is the induction coil connected on a suitable power source, while the secondary coil is represented by the workpiece being heated itself.

[0030] In order to meet the increasingly higher requirements of the extrusion industry for billet heating equipment, a single billet billet gradient heating system is designed. The new heating furnace is equipped with multiple induction coil sections, and each induction coil section is connected to the power supply separately. It can be controlled separately according to the bille...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/70C21D1/42C22F1/04
CPCY02P10/25
Inventor 王翔王武
Owner 苏州工业园区华福科技有限公司
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