磨粒流机床加工仿真与工艺参数控制的研究

发布时间：2018-01-29 15:23

  本文关键词： 磨粒流机床 液压系统 工艺参数控制 FLUENT 仿真 PLC HMI　出处：《长春理工大学》2016年硕士论文　论文类型：学位论文

【摘要】：我国航天事业的不断进步,极大地促进了我国航天器械的发展。这些器械对精度的要求越来越高,传统的加工方法很难达到精度要求。因此,出现了一种新型的加工工艺,即磨粒流加工工艺。它是通过磨料的流动挤压来完成对加工表面的抛光,去毛刺。这种加工方法特别适合于各类细缝、微小孔、复杂孔的精密、超精密加工。本文首先介绍了磨粒流机床的加工原理以及机床的整体结构。然后根据磨粒流机床液压系统的工作需要,完成了液压系统的设计、制造以及装配,并与机床进行了连接,整个液压系统已能够正常工作。其次完成了机床控制系统的设计。本文选用西门子S7-1200PLC(可编程控制器),完成了对电磁阀的控制,并应用PID控制方法,完成了对比例伺服阀的控制。此外还实现了PLC与触摸式操作面板的相互通信,实现了人机交互功能(HMI)。然后对磨粒流机床加工单向阀(阶梯内孔)进行了模拟仿真,本文采用FLUENT软件进行模拟仿真,对仿真结果进行分析总结,得出加工时流速、温度、压力等工艺参数范围,并应用控制系统对其进行控制。最后进行实验校核,根据加工仿真出来的结果,应用PLC和人机交互界面(HMI),完成对流速、温度、压力等工艺参数的控制。随后进行加工实验,得出加工结果。控制系统与加工仿真相结合,为进一步提高磨粒流机床的加工精度,提供了理论基础和技术支持,对磨粒流机床工艺参数的精确控制起到了积极作用。
[Abstract]:The continuous progress of China's aerospace industry has greatly promoted the development of space equipment in China. These instruments have higher and higher precision requirements, the traditional processing methods are difficult to achieve precision requirements. There is a new processing technology, namely abrasive flow processing, which is to finish polishing and deburring the machined surface through the flow extrusion of abrasive. This processing method is especially suitable for all kinds of fine slits and tiny holes. Precision and ultra-precision machining of complex holes. This paper first introduces the principle of abrasive flow machine tool and the overall structure of the machine tool. Then according to the working needs of hydraulic system of abrasive flow machine the hydraulic system design is completed. Manufactured and assembled, and connected to machine tools. The whole hydraulic system has been able to work normally. Secondly, the design of the machine tool control system has been completed. In this paper, Siemens S7-1200PLC (Programmable Controller) has been selected to complete the control of the solenoid valve. The PID control method is used to control the proportional servo valve. In addition, the communication between the PLC and the touch panel is realized. The man-machine interaction function is realized. Then the unidirectional valve (step inner hole) is simulated by abrasive flow machine tool. In this paper, FLUENT software is used to simulate and simulate. The simulation results are analyzed and summarized, and the range of process parameters such as velocity, temperature and pressure are obtained, and the control system is used to control the process parameters. Finally, the experimental verification is carried out, and the simulation results are obtained according to the machining simulation results. The process parameters such as flow rate, temperature and pressure are controlled by PLC and man-machine interface. Then, the machining results are obtained, and the control system is combined with machining simulation. In order to further improve the machining accuracy of the abrasive flow machine, the theoretical basis and technical support are provided, and the precise control of the technological parameters of the abrasive flow machine is played a positive role.
【学位授予单位】：长春理工大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：V460
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本文编号：1473726