【摘要】：隨著裝備制造業(yè)的發(fā)展,對深孔加工的需求日漸增長,對質(zhì)量和精度要求也越來越高。相比與發(fā)達(dá)國家,我國對于深孔加工技術(shù)的研究落后很多。刀具振動一直是深孔加工的主要問題,深孔加工用的鏜桿長徑比大,極易引發(fā)振顫,加工質(zhì)量和效率低。因此,如何減少在深孔鏜削加工中鏜桿的振動,成為一個重要研究課題。國內(nèi)外對內(nèi)置減振器減振鏜桿已進(jìn)行了一些相關(guān)研究,但減振系統(tǒng)主要參數(shù)對鏜桿減振性能的影響研究的并不多。本文將研究內(nèi)置雙不等減振器減振鏜桿的振動特性,分析影響減振性能的主要因素,并進(jìn)行模塊式減振鏜刀設(shè)計(jì)開發(fā)。首先,從分析鏜削振顫出發(fā),研究鏜桿減振原理和減振方法,建立內(nèi)置雙不等減振器減振鏜桿的力學(xué)模型和數(shù)學(xué)模型,推導(dǎo)出鏜桿的相對振幅和激勵頻率的函數(shù)表達(dá)式。在一定簡化的情況下,建立減振鏜桿理論優(yōu)化模型,采用動力學(xué)仿真軟件ADAMS對減振系統(tǒng)的彈性元件和阻尼元件進(jìn)行了優(yōu)化。其次,運(yùn)用有限元仿真軟件ANSYS對減振鏜桿進(jìn)行了仿真分析,然后運(yùn)用有限元仿真進(jìn)行頻響仿真以研究內(nèi)置減振系統(tǒng)主要參數(shù)對鏜桿減振性能的影響,包括兩個質(zhì)量塊的密度,橡膠圈的徑向剛度,阻尼液的阻尼系數(shù)。分析結(jié)果對于內(nèi)置雙不等減振器的設(shè)計(jì)具有重要指導(dǎo)作用。最后,進(jìn)行基于內(nèi)置雙不等減振器原理的模塊式鏜刀設(shè)計(jì),設(shè)計(jì)了鏜桿整體結(jié)構(gòu)和各模塊間的接口形式,并對減振模塊進(jìn)行了結(jié)構(gòu)設(shè)計(jì)和參數(shù)選擇,確定了刀柄和頭部切削模塊。
[Abstract]:With the development of equipment manufacturing industry, the demand for deep hole processing is increasing day by day, and the requirement of quality and precision is higher and higher. Compared with the developed countries, the research of deep hole processing technology in our country lags far behind. Tool vibration has always been the main problem in deep hole machining. The boring bar used in deep hole machining is easy to cause vibration because of its large ratio of length to diameter, and the machining quality and efficiency are low. Therefore, how to reduce the vibration of boring bar in deep hole boring has become an important research topic. Some related researches have been done on the vibration absorption boring bar of the built-in vibration absorber at home and abroad, but the influence of the main parameters of the damping system on the vibration absorption performance of the boring bar is not much studied. In this paper, the vibration characteristics of the boring bar with built-in double shock absorbers are studied, the main factors affecting the damping performance are analyzed, and the design and development of the modular vibration absorption boring tool are carried out. Firstly, starting from the analysis of boring vibration, the principle and method of vibration reduction of boring bar are studied. The mechanical model and mathematical model of vibration absorption bar with built-in double unequal vibration absorber are established, and the functional expressions of relative amplitude and excitation frequency of boring bar are deduced. Under some simplified conditions, the theoretical optimization model of vibration absorption and boring bar is established, and the elastic and damping elements of the damping system are optimized by using the dynamic simulation software ADAMS. Secondly, the finite element simulation software ANSYS is used to simulate and analyze the vibration absorption boring bar, and then the frequency response simulation is carried out to study the influence of the main parameters of the built-in damping system on the vibration absorption performance of the boring bar, including the density of two mass blocks. Radial stiffness of rubber ring and damping coefficient of damping liquid. The analysis results have an important guiding function for the design of the built-in double unequal shock absorber. Finally, the design of modular boring tool based on the principle of built-in double unequal shock absorber is carried out, and the integral structure of boring bar and the interface between each module are designed, and the structural design and parameter selection of the damping module are carried out. The cutter handle and head cutting module are determined.
【學(xué)位授予單位】：哈爾濱理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TG53

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本文編號：2421513