Method for manufacturing movable disc of air compressor

Abstract

The invention discloses a method for manufacturing a movable disc of an air compressor. The method comprises the steps that a die is manufactured; mixed powder is selected, wherein the mixed powder comprises 60-70 percent of atomized powder and 30-40 percent of alloyed powder; the atomized powder comprises, by weight, 70-80 parts of iron, 5-8 parts of nickel and 2-6 parts of Y; the alloyed powder comprises, by weight percentage, 1-3 percent of nickel, 4-12 percent of copper, 0.5-2 percent of molybdenum, 8-15 percent of chromium, 0.2-0.8 percent of graphite and the rest being iron; a disc and a spiral chute are obtained in a pressing mode and serve as an integrated forming part and a forming part of a pipe body; the contact surface between the disc and the spiral chute is coated with welding glue, so that the disc and the spiral chute are bonded together to form an integrated movable disc of the air compressor; the integrated movable disc of the air compressor is obtained after sintering and thermal treatment. The obtained movable disc has the advantages of being not prone to heat emission or deformation in the pressing process, high in strength and rigidity, not prone to abrasion, capable of adapting to rigorous service environment of movable discs and capable of being applied on a large scale.

Description

technical field [0001] The invention relates to the technical field of air compressor moving disks, and specifically designs a method for preparing an air compressor moving disk. Background technique [0002] The moving plate of the air compressor is a crucial mechanical part in the compressor. Its structure generally includes a spiral groove, a disc and a tube body, and the three are connected in turn to form a complete moving plate; the moving plate follows the internal bearing of the tube body. The air is driven to rotate axially, and the volume of the air compression chamber formed by the spiral groove gradually shrinks from the outside to the inside to realize the compression of the air. In this process, the moving disk is subject to the impact pressure brought by the change of gas volume and the impact force brought by high-speed rotation; therefore, it is required to form a complete spiral groove of the moving disk, and the three parts of the disk and the tube body ar...

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Problems solved by technology

[0003] But above-mentioned three parts, the traditional technology all is to adopt three to machine out respectively, then carry out welding combination, because all will weld combination between three parts, especially the welding between spiral groove and disc, because The area of ​​the spiral groove is large, and the contact area with the disc is small, the contact surface is narrow, and it is not easy to weld, which will cause the welding to be weak, and the risk of cracking is easy to be used for a long time

In order to avoid the above-mentioned risks, the applicant developed a process for preparing a complete moving plate by powder metallurgy in 2009. Although the above-mentioned risks caused by welding were solved to a certain extent; but the products prepared by this powder metallurgy method are completely made of The overall metal powder pressing, because the overall workpiece is relatively large, and the powder metal contains aluminum, it is easy to heat up and deform during the pressing molding process, resulting in a decrease in the yield and an increase in the defective rate; in addition, because the material does not disclose the specific heat treatment in the later stage The process and the final performance of the material are not well controlled. Therefore, the material is brittle, low in strength and hardness, and easy to wear; in addition, due to the single material used in the material itself, only atomized powder and alloy powder are used, and alloy powder is used as one of them. Its key material does not specifically limit its composition, resulting in ambiguity in its hardness and processing performance, which cannot meet the harsh use environment of the moving disc; therefore, it still limits the large-scale application of the product to a certain extent

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