Drum-type quenching machine

Abstract

The invention discloses a drum type quenching machine composed of frame and drum, which is characterized in: the frame is equipped with a drum bracket by a rotating shaft, the drum bracket being equipped with V-shaped riding wheel group at least consisting of front and rear V-shaped riding wheels and gear riding wheel group at least consisting of front and rear gears; the drum outer wall is equipped with V-shaped rims riding inside of the V-shaped riding wheel group and transmission rims riding on the gear riding wheel and engage with each other; the drum inner wall is fixed with screw blades; the drum bracket is equipped with V-shaped wheel sleeves outside of the V-shape rim of the drum; one end of the drum bracket is connected with jack-up air cylinder or oil cylinder at the lower part. The drum quenching machine meets the norms and technology requirements of current cast ball quenching treatment, is successfully used in wear-resisting cast ball industry, the quenched casting has even hardness and reaches the oil quenching norm. The uniformity of hardness of batch processing is better than that of oil quenching, completely avoiding the appearance of quenching crack.

Description

technical field [0001] The invention relates to a metal heat treatment equipment. It is mainly used for quenching treatment equipment of grinding media wear-resistant casting balls and segments of powder engineering. Background technique [0002] The traditional quenching of casting balls and segmental workpieces has always used the wind quenching mechanical shaker, the stirring method of the oil quenching mechanical oil pool, supplemented by mist supply or air supply device, which is the second medium or called dual medium, single wind or mist quenching The methods are all limited by the process of air quenching mechanical shaker equipment, so there are many shortcomings after quenching the workpiece. For example, the hardness of the material workpiece after quenching is significantly reduced by 2-4HRC compared with oil quenching, and the hardness of the same batch of workpieces is uneven, with a difference of up to 7-8HRC, even the phenomenon of hardening impermeability, ...

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Problems solved by technology

[0002] The traditional quenching of casting balls and segmental workpieces has always used the wind quenching mechanical shaker, the stirring method of the oil quenching mechanical oil pool, supplemented by mist supply or air supply device, which is the second medium or called dual medium, single wind or mist quenching The methods are all limited by the process of air quenching mechanical shaker equipment, so there are many shortcomings after quenching the workpiece. For example, the hardness of the material workpiece after quenching is significantly reduced by 2-4HRC compared with oil quenching, and the hardness of the same batch of workpieces is uneven, with a difference of up to 7-8HRC, even the phenomenon of hardening impermeability, the surface of a single workpiece and the contrast between the hardness difference between the surface and the center is relatively large, because the mechanical shaker is to achieve the directional flip of the workpiece by swinging left and right up and down at a certain angle or by the speed difference of reciprocating operation, Therefore, the turning frequency and turning surface are restricted, and the shape and size of the workpiece are also greatly restricted. The location of the wind and water mist quenching medium can only be provided on the side or the top. During the quenching process, the workpiece facing the shaker can only be blown openly. It is impossible to form complete contact with the construction period parts at all, not only consumes a large amount of cold air medium, but also greatly reduces the contact probability between the quenching medium and the workpiece within a unit time, so that the phenomenon of incomplete quenching occurs, so the scope of application is also limited to a certain extent, and it is favored in the wear-resistant casting industry. Gradually eliminated. Compared with the air quenching mechanical shaker, the oil quenching method just makes up for its shortcomings. The workpieces of the same material can reach the ideal range after oil quenching. However, when the oil quenching process is used, the workpiece is completely immersed in the oil. In the medium, coupled with the super strong penetrating properties of the oil itself, it has high requirements on the quality of the quenched workpiece itself. Even if the workpiece itself has only a slight body defect, it will be enlarged during the quenching process, resulting in quenching cracks, quenching cracks or potential quenching microcracks. , Potential microcracks are the fatal hazard of workpiece products. Because they are not easy to detect, they are often mixed in the finished product. Therefore, the applicability of the oil quenching process is greatly limited at a certain stage. The oil quenching cooling cycle, as well as the disadvantages of large pollution and high investment have become the fetters of the industry

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