Electromagnetic induction heating device for internal mixer rotor surface overlaying preheating

Abstract

The invention discloses an electromagnetic induction heating device for internal mixer rotor surface overlaying preheating. The electromagnetic induction heating device comprises a rotor to be welded,a plurality of electromagnetic induction heating device bodies are mounted in the rotor to be welded through stand bars and annularly distributed in the rotor to be welded at equal intervals, and a left claw disc and a right claw disc are mounted at the two ends of each electromagnetic induction heating device body respectively through clamping claws, and protection pipelines are arranged in themiddles of the right claw discs in the axial direction. The heating speed is high, the efficiency is high, the induction heating efficiency is 60% higher than that of flames and 45% higher than that of resistance heating, the heating speed is 2-3 times of resistance heating speed, the metal burn-out rate is low, and the heating cost is low; due to the fact that the efficiency and the speed are high, higher cost advantages are achieved under the condition of mass long-term use, and automatic control can be easily achieved; closed-loop control is adopted, and induction heating can be automatically controlled precisely in real time according to the current state of a heated workpiece.

Description

technical field [0001] The invention relates to the field of internal mixers, in particular to an electromagnetic induction heating device for surfacing and preheating the rotor surface of the internal mixer. Background technique [0002] The rotor is one of the main working parts of the internal mixer. During the working process, the friction between the rotor and the rubber is serious, so there is a high requirement for the wear resistance of the rotor. In order to improve the life of the rotor, a certain thickness of wear-resistant layer must be surfacing on the peaks and sides of the rotor, and then mechanically processed. At the same time, in order to improve the bonding strength between the wear-resistant layer and the substrate and reduce surface cracks, a transition layer should be welded between the substrate and the wear-resistant layer. The surfacing welding process on the rotor surface requires preheating the rotor before surfacing, heating during welding, and o...

AI Technical Summary

Problems solved by technology

[0004] (1) The heating and surfacing process cannot be carried out at the same time;

[0005] (2) The rotor has been cooling during surfacing, and the quality of surfacing is unbalanced;

[0006] (3) A huge heating furnace is required, and the heating process is slow;

[0007] (4) Low heating efficiency

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