發(fā)布時間：2018-01-29 15:23

  本文關(guān)鍵詞： 磨粒流機床 液壓系統(tǒng) 工藝參數(shù)控制 FLUENT 仿真 PLC HMI　出處：《長春理工大學》2016年碩士論文　論文類型：學位論文

【摘要】：我國航天事業(yè)的不斷進步,極大地促進了我國航天器械的發(fā)展。這些器械對精度的要求越來越高,傳統(tǒng)的加工方法很難達到精度要求。因此,出現(xiàn)了一種新型的加工工藝,即磨粒流加工工藝。它是通過磨料的流動擠壓來完成對加工表面的拋光,去毛刺。這種加工方法特別適合于各類細縫、微小孔、復雜孔的精密、超精密加工。本文首先介紹了磨粒流機床的加工原理以及機床的整體結(jié)構(gòu)。然后根據(jù)磨粒流機床液壓系統(tǒng)的工作需要,完成了液壓系統(tǒng)的設計、制造以及裝配,并與機床進行了連接,整個液壓系統(tǒng)已能夠正常工作。其次完成了機床控制系統(tǒng)的設計。本文選用西門子S7-1200PLC(可編程控制器),完成了對電磁閥的控制,并應用PID控制方法,完成了對比例伺服閥的控制。此外還實現(xiàn)了PLC與觸摸式操作面板的相互通信,實現(xiàn)了人機交互功能(HMI)。然后對磨粒流機床加工單向閥(階梯內(nèi)孔)進行了模擬仿真,本文采用FLUENT軟件進行模擬仿真,對仿真結(jié)果進行分析總結(jié),得出加工時流速、溫度、壓力等工藝參數(shù)范圍,并應用控制系統(tǒng)對其進行控制。最后進行實驗校核,根據(jù)加工仿真出來的結(jié)果,應用PLC和人機交互界面(HMI),完成對流速、溫度、壓力等工藝參數(shù)的控制。隨后進行加工實驗,得出加工結(jié)果�？刂葡到y(tǒng)與加工仿真相結(jié)合,為進一步提高磨粒流機床的加工精度,提供了理論基礎(chǔ)和技術(shù)支持,對磨粒流機床工藝參數(shù)的精確控制起到了積極作用。
[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.
【學位授予單位】：長春理工大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：V460
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本文編號：1473726