發(fā)布時(shí)間：2018-06-24 00:48

  本文選題：數(shù)控機(jī)床 + 加工過(guò)程��； 參考：《華中科技大學(xué)》2012年碩士論文

【摘要】：機(jī)床加工過(guò)程中的的振動(dòng)作為長(zhǎng)期影響著機(jī)床使用壽命和生產(chǎn)性能的一個(gè)重要因素是很多國(guó)內(nèi)外學(xué)者的研究?jī)?nèi)容，隨著自動(dòng)化技術(shù)的發(fā)展，越來(lái)越急需針對(duì)機(jī)床加工過(guò)程中的振動(dòng)建立一套完整的振動(dòng)分析系統(tǒng)。 由于機(jī)床在加工過(guò)程中存在的振動(dòng)種類(lèi)繁多，且不同類(lèi)型的振動(dòng)對(duì)加工過(guò)程的影響差異較大，對(duì)振動(dòng)的處理方式也不同，通過(guò)振動(dòng)分析確定影響機(jī)床使用的振動(dòng)種類(lèi)和來(lái)源對(duì)于優(yōu)化機(jī)床性能和提高機(jī)床的使用穩(wěn)定性是十分有意義的。本論文以數(shù)控機(jī)床加工過(guò)程振動(dòng)的分析系統(tǒng)為中心，圍繞其展開(kāi)了一系列研究。 以對(duì)影響加工表面質(zhì)量的加工過(guò)程中存在的振動(dòng)進(jìn)行分析為最終目的，本文首先對(duì)現(xiàn)有的振動(dòng)標(biāo)準(zhǔn)進(jìn)行了分析，通過(guò)分析的結(jié)果選取了均方根值（RMS）作為振動(dòng)判斷的特征值，并針對(duì)機(jī)床振動(dòng)標(biāo)準(zhǔn)的特點(diǎn)將機(jī)床的振動(dòng)狀態(tài)劃分為了“最優(yōu)”、“可用”、“注意”、“警告”四種狀態(tài)。在分析了典型加工過(guò)程中理論表面粗糙度形成的過(guò)程之后，通過(guò)在車(chē)床和銑床上的實(shí)驗(yàn)給出了加工表面粗糙度和加工過(guò)程振動(dòng)的一定關(guān)系。在對(duì)現(xiàn)有的機(jī)床加工過(guò)程振動(dòng)的種類(lèi)和對(duì)應(yīng)的振動(dòng)特征進(jìn)行分析之后，，按照振動(dòng)分析的要求進(jìn)行了分析流程的設(shè)計(jì)。 最后，建立了在車(chē)床上進(jìn)行振動(dòng)分析流程驗(yàn)證的實(shí)驗(yàn)平臺(tái)，對(duì)振動(dòng)測(cè)試的敏感點(diǎn)和敏感方向進(jìn)行了實(shí)驗(yàn)研究，并利用實(shí)驗(yàn)結(jié)果和模擬的振動(dòng)故的對(duì)比障驗(yàn)證了分析流程的可行性。并建立了一個(gè)基于MATLB GUI對(duì)振動(dòng)數(shù)據(jù)進(jìn)行離線分析的圖形界面。 通過(guò)上面的工作，本文為建立完整的加工過(guò)程振動(dòng)分析系統(tǒng)提供了初步的理論基礎(chǔ)，同時(shí)本文通過(guò)對(duì)加工過(guò)程中振動(dòng)對(duì)加工表面粗糙度影響的實(shí)驗(yàn)研究給出了建立加工過(guò)程中振動(dòng)量級(jí)的新思路。
[Abstract]:As an important factor that affects the service life and production performance of machine tools in a long time, the vibration in machining process is the research content of many scholars at home and abroad. With the development of automation technology, It is more and more urgent to establish a complete vibration analysis system for the vibration of machine tools. Because there are many kinds of vibration in the machining process of machine tools, and the influence of different types of vibration on the machining process is quite different, the treatment of vibration is also different. It is of great significance to determine the types and sources of vibration that affect the use of machine tools through vibration analysis to optimize the performance of machine tools and to improve the stability of machine tools. This thesis centers on the vibration analysis system of NC machine tool and develops a series of researches around it. In order to analyze the vibration existing in the machining process which affects the quality of the machined surface, this paper first analyzes the existing vibration standards, and selects the root mean square value (RMS) as the eigenvalue of vibration judgment through the result of the analysis. According to the characteristics of machine tool vibration standard, the vibration state of machine tool is divided into four states: "optimum", "available", "attention" and "warning". After analyzing the formation process of theoretical surface roughness in typical machining process, the relationship between machining surface roughness and machining process vibration is given through experiments on lathe and milling machine. After analyzing the types and corresponding vibration characteristics of the existing machine tool process vibration, the design of the analysis flow is carried out according to the requirements of the vibration analysis. Finally, an experimental platform for verifying the flow of vibration analysis on a lathe is established, and the sensitive points and directions of vibration testing are studied experimentally. The feasibility of the analysis process is verified by comparing the experimental results with the simulated vibration barriers. A graphical interface for off-line analysis of vibration data based on MATLAB GUI is established. Through the above work, this paper provides a preliminary theoretical basis for the establishment of a complete vibration analysis system for machining process. At the same time, through the experimental research on the effect of vibration on the roughness of machined surface during machining, a new way to establish the vibration magnitude in machining process is given in this paper.
【學(xué)位授予單位】：華中科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類(lèi)號(hào)】：TG659

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