镁合金低压铸造连续化生产技术的研究

Continuous Production Technology of Low Pressure Casting for Magnesium Alloy Parts

摘要:

研制开发了一种新型镁合金低压铸造连续化生产技术。该技术采用双工位结构设计，通过台车的移动与升降，实现两台镁合金低压铸造设备在不同工位之间的切换，保证镁合金铸件生产的连续进行。在液面加压控制系统中采用了液面悬浮技术，可实现镁合金液面在升液管口的精确悬浮控制，有效降低了铸件中的氧化夹杂缺陷，提高了生产效率。研制开发的模糊PID复合控制算法，可实现镁合金低压铸造过程的精确控制，压力控制误差在0.5 kPa以内。

Abstract:

A new type of continuous production technology of low pressure casting for magnesium alloy was developed. Using the duplex station design, the technology achieves the switch between two pieces of low pressure casting equipment of magnesium alloy at different stations through the furnace transportation vehicle’s movements, ensuring the continuous production of magnesium alloy casting. A level suspension technology has been used in the pressure control system, which realizes the precise suspension control of metal level in riser tube orifice, reduces the oxide inclusion defects and improves the production efficiency. The developed fuzzy-PID hybrid control technology possesses high precision during the course of low pressure casting process for magnesium alloy. The pressure control error is less than 0.5 kPa.