本文選題：碳纖維復(fù)合材料 + 切削仿真��； 參考：《沈陽航空航天大學(xué)》2017年碩士論文

【摘要】：水平井橋塞分段壓裂技術(shù)是頁巖油氣井開發(fā)的主體技術(shù),其中采用下入磨銑工具完成橋塞的鉆銑是這項技術(shù)的關(guān)鍵環(huán)節(jié)。目前碳纖維復(fù)合材料的應(yīng)用非常廣泛,其比強度、比模量、高溫性能優(yōu)越,國內(nèi)外油田逐步將其應(yīng)用到橋塞的制造上。但是由于碳纖維復(fù)合材料是難切削材料,磨銑工具鉆銑碳纖維復(fù)合材料橋塞過程中會出現(xiàn)一些問題—磨銑工具極易發(fā)生磨損。因此,需要對碳纖維復(fù)合材料橋塞的切削技術(shù)進行深入研究。本文采用了有限元模擬仿真碳纖維復(fù)合材料切削過程和進行基礎(chǔ)切削試驗的方法,對碳纖維復(fù)合材料橋塞切削技術(shù)進行了研究。首先,使用有限元分析軟件ABAQUS建立了碳纖維復(fù)合材料的切削仿真模型,從數(shù)值模擬的角度對碳纖維復(fù)合材料的切削過程進行了研究,理論上直觀清晰地認識了碳纖維復(fù)合材料的切削變形過程。然后,針對碳纖維復(fù)合材料橋塞鉆銑中出現(xiàn)磨銑工具磨損的問題,采用基礎(chǔ)試驗的方法進行研究。采用涂層硬質(zhì)合金刀具進行碳纖維復(fù)合材料的切削試驗,觀察了刀具磨損形態(tài)、分析了刀具的磨損變化規(guī)律,研究得出了刀具的磨損機理以磨粒磨損為主;研究了切削用量三要素對刀具磨損的影響,采用單一變量法分別研究了切削速度、背吃刀量、進給量對刀具磨損的影響,得出切削速度對刀具磨損的影響最大;對比研究了YG8和YT15切削碳纖維復(fù)合材料的刀具磨損,分析刀具材料物理和力學(xué)性能對刀具磨損的影響,得出YG8硬質(zhì)合金刀具更為適合切削碳纖維復(fù)合材料。最后,通過有限元分析仿真切削過程和一系列基礎(chǔ)試驗的研究得出了相應(yīng)的結(jié)論,分析了刀具磨損原因和減輕刀具磨損措施,對碳纖維復(fù)合材料橋塞鉆銑技術(shù)和磨銑工具兩個方面進行了改進。(1)改進了磨銑工具的結(jié)構(gòu),整體采用鑲塊式結(jié)構(gòu),切削元件采用分割刃和切削刃兩種形式(2)合理選擇刀具材料,選擇了YG8為磨銑工具的刀具材料(3)優(yōu)化了磨銑參數(shù),采用低速、大進給量。
[Abstract]:Section fracturing technology of bridge plug in horizontal well is the main technology of shale oil and gas well development, in which the drilling and milling of bridge plug is the key link of this technology by means of down-grinding and milling tool. At present, carbon fiber composites are widely used, their specific strength, specific modulus and high temperature performance are superior, so oil fields at home and abroad have gradually applied them to the manufacture of bridge plug. However, due to the fact that carbon fiber composites are difficult to be machined, there will be some problems in the process of grinding and milling carbon fiber composite bridge plugs-grinding and milling tools are easy to be worn. Therefore, it is necessary to study the cutting technology of carbon fiber composite bridge plug. In this paper, the cutting technology of carbon fiber composite bridge plug is studied by using finite element method to simulate the cutting process of carbon fiber composite and to carry out foundation cutting test. Firstly, the cutting simulation model of CFRP is established by using finite element analysis software ABAQUS, and the cutting process of CFRP is studied from the point of view of numerical simulation. In theory, the cutting deformation process of carbon fiber composites is clearly and intuitively understood. Then, the basic test method is used to study the wear problem of grinding and milling tools in bridge plug drilling and milling of carbon fiber composites. The cutting test of carbon fiber composite material with coated cemented carbide tool was carried out. The wear pattern of the tool was observed and the change law of tool wear was analyzed. The wear mechanism of the tool was mainly abrasive wear. The influence of three factors of cutting parameters on tool wear is studied. The influence of cutting speed, back feed and feed rate on tool wear is studied by single variable method, and it is concluded that cutting speed has the greatest influence on tool wear. The tool wear of YG8 and YT15 cutting carbon fiber composites was studied. The effects of the physical and mechanical properties of cutting tool materials on tool wear were analyzed. It was concluded that YG8 carbide cutting tool is more suitable for cutting carbon fiber composites. Finally, through the finite element analysis of simulation cutting process and a series of basic experiments, the corresponding conclusions are obtained, and the causes of tool wear and the measures to reduce tool wear are analyzed. The technology of bridge plug drilling and milling and grinding and milling tools of carbon fiber composite are improved. The structure of grinding and milling tools is improved. The insert type structure is adopted as a whole, and the cutting element adopts two forms of cutting edge and cutting edge. YG8 is chosen as the tool material for grinding and milling tools. The parameters of grinding and milling are optimized with low speed and high feed rate.
【學(xué)位授予單位】：沈陽航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TE934.2;TB332

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