Preparation method and application of irregular gear with annular groove

Abstract

A preparation method of an irregular gear with an annular groove comprises the following steps that S1, a certain amount of powder metallurgy raw materials for preparing the gear are loaded into a mold; s2, after the powder metallurgy raw materials in the mold are pressed into the needed shape and compactness, demolding is conducted, and a green body is obtained; s3, the annular gasket is clamped in the annular groove of the green body, then the green body and the gasket are sent into a sintering furnace together to be sintered, and after the sintering process is finished, the gear with the gasket is taken out; and S4, the gasket is taken out of the annular groove, whether the sawtooth part, close to the annular groove, of the gear is warped or not is observed, if the sawtooth part, close to the annular groove, of the gear is warped, a correction mold is used for correction till the warped part disappears, the gear is taken out of the correction mold, and a final product is obtained. The problem that the sawtooth part close to the annular groove inclines inwards in the preparation process of the gear can be effectively solved, and the method is simple, convenient to operate and low in cost.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a preparation method and application of an irregular gear with an annular groove. Background technique [0002] At present, most of the gears adopt the pouring molding process, and the pouring molding process has the advantages of saving time, simplicity, and economy for regular gears, but for irregular gears, the pouring molding process is not practical. It is because irregular gears are difficult to demould after pouring, and forced demoulding is easy to cause damage to irregular parts. Therefore, for irregular gears, the popular powder metallurgy molding technology has advantages. [0003] Powder metallurgy molding is one of the basic processes in powder metallurgy production. The purpose is to make loose (metal, ceramic, or other materials) powders into semi-finished products with predetermined geometry, size, compactness and strength through pressure in a mold. T...

AI Technical Summary

Problems solved by technology

The semi-finished product needs at least a subsequent sintering process before it can become a finished product. However, during the sintering process, the sawtooth part of the gear near the annular groove is prone to warping or inward tilting, especially for gears with annular grooves. Irregular gears with grooves, such as fishing rod reels, etc., the deviation of the sawtooth part is particularly obvious. It is easy to deal with the warping phenomenon. It can also be made regular by knocking, forging or extrusion, but It is difficult to solve problems such as inclination, which requires avoiding such defects in the preparation process of irregular gears with annular grooves

However, the existing gear preparation methods are difficult to limit the occurrence of the above-mentioned defects. Therefore, it is necessary to seek a new gear preparation method.

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