本文選題：電錘 + 數(shù)值模擬　； 參考：《浙江大學(xué)》2017年碩士論文

【摘要】：電驅(qū)沖擊氣錘簡稱電錘是一種應(yīng)用廣泛的電動工具,屬于沖擊機械的一種。目前國內(nèi)電錘企業(yè)研發(fā)人員對電錘設(shè)計理論缺乏足夠的認識,導(dǎo)致設(shè)計工作過于依賴經(jīng)驗,效率低下。為此,本文結(jié)合企業(yè)項目,通過數(shù)學(xué)推導(dǎo)建立了電錘沖擊系統(tǒng)的仿真模型,并采用組合試驗和優(yōu)化設(shè)計等手段,對電錘的性能進行分析和優(yōu)化,為電錘設(shè)計工作提供指導(dǎo)。全文共分為五章:第一章對電錘以及電動工具的國內(nèi)外發(fā)展現(xiàn)狀進行歸納總結(jié),包括行業(yè)發(fā)展、研究現(xiàn)狀等,分析了本文研究工作的必要性。在借鑒前人研究成果的基礎(chǔ)上,選擇研究的切入點和研究方法,從而確定了本文的組織結(jié)構(gòu);第二章首先建立了電錘驅(qū)動機構(gòu)的數(shù)學(xué)模型,并編寫了仿真程序,實現(xiàn)了工作過程的數(shù)值模擬。然后分析了氣缸直徑、沖擊頻率、撞錘初始位置、撞錘質(zhì)量、曲柄長度、補氣孔直徑以及補氣孔位置等電錘重要參數(shù)對工作性能的影響。最后對撞錘質(zhì)量和曲柄長度兩個參數(shù)進行了兩因素三水平的組合試驗,并將試驗結(jié)果與仿真結(jié)果進行對比,驗證了模型的可靠性;第三章根據(jù)波動力學(xué)建立了電錘沖擊機構(gòu)的數(shù)學(xué)模型,并編寫了仿真程序,實現(xiàn)了電錘沖擊鑿巖過程以及應(yīng)力波傳遞過程的數(shù)值模擬。然后通過組合試驗方法分析了副錘結(jié)構(gòu)參數(shù)的設(shè)計規(guī)律。為了驗證模型的正確性,利用有限元方法與所編寫的模擬程序計算結(jié)果進行了對比。最后通過優(yōu)化方法對副錘結(jié)構(gòu)進行了優(yōu)化,并進行試驗,對比試驗數(shù)據(jù)和理論計算結(jié)果,驗證了理論模型的可靠性;第四章將驅(qū)動機構(gòu)數(shù)學(xué)模型和沖擊機構(gòu)數(shù)學(xué)模型相結(jié)合,建立了整個沖擊系統(tǒng)的仿真模型。在此基礎(chǔ)上,以沖擊系統(tǒng)結(jié)構(gòu)參數(shù)作為優(yōu)化變量,以單次鑿入量為優(yōu)化目標,對沖擊系統(tǒng)在不同工況下的工作性能進行了優(yōu)化,得出了對不同工況都有良好適應(yīng)性的優(yōu)化方案;第五章對全文的工作做了總結(jié),并對后續(xù)的研究工作進行了展望。
[Abstract]:Electric drive impact gas hammer is a widely used electric tool, which belongs to impact machine. At present, the R & D personnel of domestic electric hammer enterprises lack sufficient understanding of the design theory of electric hammer, which results in the design work relying too much on experience and inefficiency. In this paper, the simulation model of electric hammer impact system is established by mathematical derivation combined with enterprise project, and the performance of electric hammer is analyzed and optimized by means of combination test and optimization design, which provides guidance for hammer design. The paper is divided into five chapters: the first chapter summarizes the development of electric hammer and electric tools at home and abroad, including the development of the industry, the status quo of research, and analyzes the necessity of the research work in this paper. On the basis of drawing lessons from the previous research results, the paper chooses the breakthrough point and research method to determine the organization structure of this paper. In chapter 2, the mathematical model of the electric hammer driving mechanism is established, and the simulation program is written. The numerical simulation of the working process is realized. Then the effects of cylinder diameter, impact frequency, initial position of hammer, mass of hammer, length of crank, diameter of air supply hole and position of air supply hole on the working performance of electric hammer are analyzed. Finally, the impact hammer mass and crank length are tested in combination with two factors and three levels, and the reliability of the model is verified by comparing the test results with the simulation results. In chapter 3, according to the wave mechanics, the mathematical model of the hammer shock mechanism is established, and the simulation program is compiled to realize the numerical simulation of the hammer impact rock drilling process and the stress wave transfer process. Then the design law of the structural parameters of the auxiliary hammer is analyzed by the combined test method. In order to verify the correctness of the model, the finite element method is compared with the calculated results of the simulation program. Finally, the auxiliary hammer structure is optimized by optimization method, and the experimental results are compared to verify the reliability of the theoretical model. Chapter four combines the driving mechanism mathematical model with the impact mechanism mathematical model. The simulation model of the whole impact system is established. On this basis, taking the structural parameters of the impact system as the optimization variable and the single chisel as the optimization objective, the working performance of the impact system under different working conditions is optimized, and the optimal scheme with good adaptability to different working conditions is obtained. The fifth chapter summarizes the work of the paper and prospects the future research work.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TS914.5

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本文編號：2014703