Manufacture method for automobile 5DYA limited block

Abstract

The invention discloses a manufacture method for an automobile 5DYA limited block. The limited block comprises the following raw materials in percentages by weight: 94.5-94.9 percent of atomized iron powder, 0.7-0.9 percent of graphite, 1.95-2.05 percent of copper powder, 0.9-1 percent of nickel powder, 1 percent of molybdenum disulfide, 0.5 percent of zinc stearate and 0.025-0.05 percent of spindle oil. The process provided by the invention comprises the following steps of: 1, adding the graphite, the copper powder, the nickel powder, the molybdenum disulfide and a proper amount of the spindle oil into the atomized iron powder, and mixing uniformly to prepare a mixed material; 2, loading the mixed material into a mould and performing press forming by an automatic pressing machine to prepare a forming element; 3, loading the forming element into a sintering furnace and sintering in an atmosphere of decomposing ammonia at the temperature of 1160-1165 DEG C for 60-80 minutes; and 4, carrying out following machining by adopting a drilling machine to obtain a finished product. The manufacture method provided by the invention belongs to a powder metallurgy manufacturing technology and is suitable for a product with a complex shape and large quantity.

Description

technical field [0001] The invention relates to a manufacturing method of a limiting block, in particular to a manufacturing method of a 5DYA limiting block for an automobile. Background technique [0002] The 5DYA limit block is a special-shaped part assembled in the automobile gearbox. It is usually formed by ZG45 casting or 45 carbon steel pressure processing, and is processed by multi-process mechanical cutting. The above two manufacturing methods can process limit Bit blocks, but the disadvantages are high metal consumption, high energy consumption, high processing costs, serious pollution, and low product qualification rate. When the limit block is manufactured in batches, the material used for a single piece is 28-29 grams, the net weight is 24 grams, and the working time is about 30 minutes (accumulated working hours). Contents of the invention [0003] The purpose of the present invention is to overcome the disadvantages of the existing manufacturing method of th...

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Problems solved by technology

[0002] The 5DYA limit block is a special-shaped part assembled in the automobile gearbox. It is usually formed by ZG45 casting or 45 carbon steel pressure processing, and is processed by multi-process mechanical cutting. The above two manufacturing methods can process limit Bit blocks, but the disadvantages are high metal consumption, high energy consumption, high processing costs, serious pollution, and low product qualification rate