【摘要】：超聲珩磨加工機理及聲振系統(tǒng)的研究是現(xiàn)代切削技術及應用的一個重要研究方向,目的是突破傳統(tǒng)的單一縱向振動,實現(xiàn)縱彎、縱扭、雙彎曲復合振動。復合振動中刀具獨特的運動軌跡不但有助于排屑,而且有利于切削液對加工區(qū)進行冷卻、潤滑、清洗,避免切屑對已加工表面的劃傷,提高加工質量和加工效率。本文在分析縱扭超聲振動珩磨加工機理的基礎上,深入研究了超聲振動珩磨聲振系統(tǒng)的物理模型和振動特性。通過對縱扭超聲振動珩磨運動模型的分析,建立了縱扭超聲振動珩磨振動傳遞系統(tǒng)的數(shù)學模型,借助于有限元分析軟件ANSYS對模型進行了模態(tài)分析、瞬態(tài)動力學分析和諧響應分析,并運用其后處理模塊對數(shù)值模擬結果進行了圖形及曲線描述,為縱扭超聲珩磨聲振系統(tǒng)的結構設計和性能優(yōu)化提供了理論依據(jù)。在有限元分析的基礎上,對振動傳遞系統(tǒng)進行了試驗研究。通過反復檢測振動傳遞系統(tǒng)中傳振桿、彎曲振動圓盤、斜槽等組成部分的振幅和諧振頻率,找出各因素對振幅和頻率的影響趨勢,依據(jù)試驗數(shù)據(jù)得到所設計的振動傳遞系統(tǒng)的最佳工藝參數(shù),試驗研究結果與有限元分析結果基本相符。本文利用自行設計制造的超聲珩磨裝置對難加工材料鈦合金TC4進行了加工試驗,用對比試驗和正交試驗的方法分析超聲振動珩磨和普通珩磨的加工效果,分析加工參數(shù)變化對超聲珩磨加工效果的影響,得到了鈦合金在超聲珩磨加工中的最佳工藝參數(shù)。本文將縱扭超聲振動應用于珩磨加工,為零件內孔表面精加工提供了一種新的工藝方法。
[Abstract]:The research of ultrasonic honing mechanism and acoustic vibration system is an important research direction of modern cutting technology and application. The aim is to break through the traditional single longitudinal vibration and realize longitudinal bending, longitudinal torsional and double bending compound vibration. The unique movement path of the cutting tool in composite vibration is not only helpful for chip removal, but also helpful for the cutting fluid to cool, lubricate and clean the machining zone, to avoid the chip scratches on the machined surface, and to improve the machining quality and efficiency. On the basis of analyzing the mechanism of longitudinal torsional ultrasonic vibration honing, the physical model and vibration characteristics of ultrasonic vibration honing system are deeply studied in this paper. By analyzing the motion model of longitudinal-torsional ultrasonic vibration honing, the mathematical model of vibration transfer system of longitudinal-torsional ultrasonic vibration honing is established, and the modal analysis of the model is carried out by means of finite element analysis software ANSYS. The transient dynamic analysis and harmonious response analysis are carried out, and the numerical simulation results are described by using the post-processing module, which provides a theoretical basis for the structural design and performance optimization of the longitudinal-torsional ultrasonic honing system. On the basis of finite element analysis, the vibration transfer system is studied experimentally. By repeatedly detecting the amplitude and resonant frequency of the components of the vibration transfer system, such as the rod, the bending vibration disk and the inclined groove, the influence trend of each factor on the amplitude and frequency is found out. According to the experimental data, the optimum technological parameters of the designed vibration transfer system are obtained, and the experimental results are basically in agreement with the results of finite element analysis. In this paper, a self-designed ultrasonic honing device is used to process the hard-to-machined titanium alloy TC4. The machining effects of ultrasonic vibration honing and ordinary honing are analyzed by means of contrast test and orthogonal test. The influence of machining parameters on ultrasonic honing is analyzed, and the optimum technological parameters of titanium alloy in ultrasonic honing are obtained. In this paper, the longitudinal-torsional ultrasonic vibration is applied to honing, which provides a new technology for finishing the inner hole surface of parts.
【學位授予單位】：西安石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TG580.67

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