Iron core for engine cooling fan and manufacturing process thereof

Abstract

The invention discloses an iron core for an engine cooling fan and a manufacturing process thereof. The iron core is a powder metallurgical material prepared from the following raw materials by weight percent: 0.01-1.0% of phosphorus, 0.1-1.5% of free cutting agents, 0.2-2% of lubricating agents, 0.01-1.5% of binding agents and the balance iron powder. The manufacturing process of the iron core comprises the steps of material mixing, forming, sintering, sealing, reshaping, auxiliary machining and surface treatment. The invention has the following beneficial effects: a powder metallurgy process is simple and reliable, ensures that the production efficiency and material utilization are greatly improved, and is especially suitable for mass production; and the iron core product formed by a mould has the advantages of stable quality, high machining precision, low manufacturing cost, good sealing property, capability of reducing the weight of the engine when the iron core is used for the engine cooling fan, low energy consumption, obvious oil saving effect, improvement of the overall property of the engine cooling fan and the like, and is convenient and safe in assembly.

Description

technical field [0001] The invention belongs to the technical field of engine component manufacturing, and in particular relates to an iron core for an engine cooling fan and a manufacturing process thereof. Background technique [0002] At present, the engine cooling fan is hard-connected to the engine, that is, the cooling fan starts synchronously after the engine is started. When the engine temperature does not reach the temperature of the fan, the cooling fan still rotates synchronously with the engine, which increases the fuel consumption of the engine. With the development of low-carbon economy, the engine cooling technology is developing in an intelligent direction, and the cooling fan speed changes with the engine temperature to achieve the purpose of reducing fuel consumption. The iron core is the key part to adjust the speed in the intelligent cooling fan. [0003] The existing iron cores for engine cooling fans use high-quality high-purity low-carbon steel as raw...

AI Technical Summary

Problems solved by technology

[0003] The existing iron cores for engine cooling fans use high-quality high-purity low-carbon steel as raw materials and are produced through machining processes. The shortcomings are as follows: due to the complex shape of the iron cores, sometimes machining is difficult or even impossible, and the machining accuracy is low. The material utilization rate is low, so it is difficult to mass-produce iron cores with stable quality and good sealing performance

The above-mentioned iron core products caused damage and lack of materials to the rubber sealing ring used in conjunction with it, resulting in poor sealing performance, which in turn reduced the overall performance of the engine cooling fan, and in severe cases would cause the engine cooling fan to be scrapped as a whole

In addition, the machining process of the iron core is complex and has many procedures, requiring a large amount of processing equipment and man-hours, so the production efficiency is low and the manufacturing cost is high.

Images