Nodular cast iron grinding ball quenching device

Abstract

The invention belongs to the technical field of grinding ball heat treatment, and particularly relates to a nodular cast iron grinding ball quenching device. The nodular cast iron grinding ball quenching device comprises a water box, and the side wall of the water box is symmetrically and fixedly provided with servo motors; screws are fixed to the ends of output shafts of the servo motors, the surfaces of the screws are in threaded connection with slide blocks, and a rectangular block is fixed between the two slide blocks; and the top end of each rectangular block is provided with downward through holes at equal intervals in the length direction of the rectangular block, and the bottoms of the through holes are provided with first spray pipes at equal intervals in the circumferential direction of the through holes. According to the nodular cast iron grinding ball quenching device, by arranging an air compressor and the first spray pipes, high-speed gas is sprayed out from the first spray pipes, thus, grinding balls are in a suspension state under action of the high-speed gas, accordingly, the grinding balls are uniformly cooled in the process of making contact with air and water, the problem that heat transfer is uneven due to the fact that the grinding balls make contact with parts, and the quenching quality of the grinding balls is ensured.

Description

Technical field [0001] The invention belongs to the technical field of heat treatment of grinding balls, in particular to a quenching device for nodular cast iron grinding balls. Background technique [0002] Nodular cast iron is a high-strength cast iron material developed in the 1950s. Its comprehensive performance is close to that of steel. Based on its excellent performance, it has been successfully used to cast some complex forces, strength, toughness, and wear resistance. Highly demanding parts. Nodular cast iron has rapidly developed into a cast iron material second only to gray cast iron and widely used. [0003] The important grinding medium in the ball mill is the grinding balls in the barrel of the ball mill. All materials that are ground by the ball mill are completed by the collision and friction between the grinding balls. Therefore, the quality and material of the grinding balls are particularly important. [0004] The grinding ball is basically formed by casting, a...

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Problems solved by technology

[0004] The grinding ball is basically formed by casting, and then the metal structure inside the grinding ball is controlled through the subsequent heat treatment process to achieve the effect of improving the performance of the grinding ball, and the grinding ball needs to be quenched after casting. When quenching, due to the large surface area of ​​the large-diameter ball, it is easy to cause uneven cooling on the surface of the ball, which leads to uneven hardness on the surface of the ball;

[0005] At the same time, when the balls enter the through hole, the gas ejected from the No. 1 nozzle makes the balls suspended, but the impact force of the ejected gas is too strong, which may push the balls out of the through hole, resulting in the failure of normal quenching of the balls. Therefore, the present invention proposes a nodular cast iron grinding ball quenching device

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