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Control method for carburizing, quenching and deformation of thin wheel disk type large-diameter cylindrical gear

A cylindrical gear, carburizing and quenching technology, applied in the direction of heat treatment process control, manufacturing tools, coating, etc., can solve problems such as deformation, achieve the effect of ingenious conception, reduction of heating rate and cooling rate inconsistency, and easy method

Inactive Publication Date: 2013-11-06
宝钢苏冶重工有限公司
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  • Abstract
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Problems solved by technology

[0004] The invention provides a method for controlling the carburizing and quenching deformation of a thin web-type large-diameter cylindrical gear, aiming at solving the serious deformation problem in the carburizing and quenching process of the thin-web type large-diameter cylindrical gear

Method used

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  • Control method for carburizing, quenching and deformation of thin wheel disk type large-diameter cylindrical gear
  • Control method for carburizing, quenching and deformation of thin wheel disk type large-diameter cylindrical gear

Examples

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Embodiment

[0016] Example: A Control Method for Carburizing and Quenching Deformation of Thin Web Plate Large-diameter Cylindrical Gears

[0017] Such as figure 1 As shown, the cylindrical gear in this embodiment is a spur gear 1, the diameter D of the outer edge of the gear is between 1.2 and 1.7 meters, and the thickness S of the web 2 is between 150 and 250 mm.

[0018] Such as figure 2 As shown, for this type of thin web-type large-diameter spur gear 1, before the carburizing and quenching starts, the aluminum silicate fiber material 4 is used to fill the corresponding concave parts 3 on both sides of the web 2 of the cylindrical gear 1, and A steel plate 5 is respectively arranged at both ends of the cylindrical gear 1, and the aluminum silicate fiber material 4 covering both sides of the web 2 of the cylindrical gear 1 is clamped and pressed by the two steel plates 5, so as to protect the web 2 of the cylindrical gear 1 part; then carry out carburizing and quenching heat treatme...

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Abstract

The invention provides a control method for the carburizing, quenching and deformation of a thin wheel disk type large-diameter cylindrical gear. The method is characterized in that before the carburizing and quenching start, concave parts which correspond to two sides of the wheel disk of the cylindrical gear are filled by an aluminum silicate fiber material, the wheel disk of the cylindrical gear is thermally protected by means of clamping and pressing of a steel plate, the temperature change speed of each part is cushioned, and the temperature error of each part is evened, so that the problem that the gear is seriously deformed due to inconsistent heating speed and cooling speed of parts can be reduced.

Description

technical field [0001] The invention relates to a gear heat treatment process, in particular to a control method for reducing the deformation of a thin web-type large-diameter cylindrical gear during carburizing and quenching. Background technique [0002] Such as figure 1 As shown, the thin web-type large-diameter cylindrical gear refers to a cylindrical gear whose diameter D is greater than 1.2 meters, and the ratio of web thickness S to diameter D is less than or equal to 0.2. This gear is widely used in medium and large mechanical equipment. From the perspective of processing flow, the manufacture of gears requires a heat treatment process of carburizing and quenching to improve the mechanical properties of the teeth such as strength and surface wear resistance. The carburizing and quenching process is usually arranged in the later stage of the gear production process. For the thin web-type large-diameter cylindrical gear, due to its special shape and structure (such a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/32C21D1/18C21D11/00C23C8/20C23F17/00
Inventor 龚晓云张建刚乔艳
Owner 宝钢苏冶重工有限公司
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