Roll air-cooled quenching machine

Abstract

The invention relates to mechanical equipment in the field of metal heat treatment, in particular to an air blast quenching machine for rollers. The air blast quenching machine comprises an air spraying device, two heating devices, an air extracting device and a rotation device, wherein the air spraying device, the heating devices and the rotation device are all mounted and fixedly connected to a horizontal surface on a concrete poured foundation base; the air extracting device is mounted and fixedly connected into a groove in the foundation base; the heating devices are arranged on two sides of the rotation device symmetrically; and a workpiece roller is arranged on the rotation device. The air blast quenching machine adopts four-carrier roller synchronous constant-speed mobile rotation, so that the heating uniformity and the quenching quality are improved; due to combined function of the air spraying device and the air extracting device, the cooling speed can be accelerated, and the work environment can be improved; and as both the air spraying device and the heating devices are arranged on and connected with a link mechanism, mobile starting and stopping can be realized, and spray head distances can be adjusted fast.

Description

technical field [0001] The invention relates to a mechanical device in the field of metal heat treatment, in particular to a roll air-cooled quenching machine. Background technique [0002] In roll manufacturing, it is necessary to adjust or increase the hardness of the roll surface, and the quenching heat treatment process is often used. Since the rolls are generally high-carbon steel, semi-steel or cast iron rolls with high carbon content, traditional water quenching or oil quenching is used for quenching. Quenching, there is a high chance of cracks. At present, there are special equipment for high-frequency quenching for rolls in China. Due to the large fluctuation range of cooling speed, this type of equipment is not conducive to the stability of the heat treatment quality of roll parts. There are also air-cooled roll quenching equipment. This type of equipment adopts air cooling. Due to the small fluctuation range of the spray cooling speed, it is not sensitive to the ...

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Problems solved by technology

At present, there are special equipment for high-frequency quenching for rolls in China. Due to the large fluctuation range of cooling speed, this type of equipment is not conducive to the stability of the heat treatment quality of roll parts.

There are also air-cooled roll quenching equipment. This type of equipment adopts air cooling. Due to the small fluctuation range of the spray cooling speed, it is not sensitive to the surface state of rolls with high carbon content, and there are few human factors, which can better ensure the quenching quality of the rolls. At present, the air-cooling quenching process is generally used at home and abroad to quench the rolls. However, due to the large investment, complicated operation, and poor cooling effect of this type of equipment, the energy consumption of the process is not well controlled, resulting in high energy consumption.

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