AZ91镁合金消失模铸造浇注温度控制系统的研究  

Research on Pouring Temperature Control System in AZ91 Magnesium Alloy Lost Foam Casting Based on MCU

作　　者：于海丽[1] 段广云[2] 

机构地区：[1]新疆农业职业技术学院,新疆昌吉831100 [2]兰州理工大学材料科学与工程学院,甘肃兰州730050

出　　处：《铸造技术》2016年第11期2484-2487,共4页Foundry Technology

基　　金：新疆维吾尔自治区自然科学基金自助项目(2011211A002)

摘　　要：针对目前AZ91镁合金消失模铸造浇注温度控制系统在调控温度时,存在明显的滞后性及偏差性等问题,对消失模铸造工艺及浇注温度对AZ91镁合金流动性进行研究,分析了浇注温度控制的工艺流程,提出了基于单片机的AZ91镁合金消失模铸造温度控制系统,设计了温度控制系统方案,采用PIC单片机作为控制器,联合模糊PID算法,实现对温度的实时控制。通过仿真实验结果表明,该温度控制系统在对温度进行调控时,调节时间短、控制精度较高。Aimed at the problems of obvious temperature hysteresis qualit and inaccuracy in the current temperature control of AZ91 magnesium alloy lost foam casting, the process of lost foam casting and the flow properties of AZ91 magnesium alloy were studied, the process flow of pouring temperature control was analyzed, a temperature control system for AZ91 magnesium alloy lost foam casting based on MCU was proposed, and the temperature control system was designed, using PIC microcontroller as the controller combined with the fuzzy PID algorithm to achieve real-time control of the temperature. The simulation results show that the temperature control system has shorter adjusting time and higher control precision in the control of temperature.

关 键 词：AZ91镁合金 消失模铸造 温度控制 PIC16F877A 模糊PID算法 

分 类 号：TG292[金属学及工艺—铸造] TP273[自动化与计算机技术—检测技术与自动化装置]