本文選題：五軸數(shù)控工具磨床設計 + 虛擬樣機　； 參考：《西南交通大學》2017年碩士論文

【摘要】：隨著工業(yè)的不斷發(fā)展,現(xiàn)代機械制造業(yè)對零件產(chǎn)品的要求越來越苛刻,對加工刀具的性能也提出了更高的挑戰(zhàn)。現(xiàn)代數(shù)控刀具的加工難點主要體現(xiàn)在超硬材料的磨削以及先進型面的擬合,這對刃磨刀具的數(shù)控工具磨床提出了較高的水平要求。其中五軸數(shù)控工具磨床的發(fā)展水平作為國家工業(yè)競爭力的重要基石,成為了先進工具磨床的研究熱點之一。本文在這一背景下基于某廠商的加工需求,結(jié)合虛擬樣機技術完成了某型第一代五軸數(shù)控工具磨床機械結(jié)構(gòu)的設計,并針對數(shù)字化的磨床虛擬樣機進行靜、動態(tài)性能的試驗分析,依據(jù)分析結(jié)果完成了設計方案的優(yōu)化以及評價工作。其中虛擬樣機技術的使用極大地縮短了磨床研發(fā)的周期,為該型五軸數(shù)控工具磨床的試驗樣機制造提供了理論基礎與數(shù)據(jù)支持。本文主要研究內(nèi)容如下:(1)基于模塊化的設計思想,研究了五軸數(shù)控工具磨床功能模塊的創(chuàng)建工作,明確磨床機械結(jié)構(gòu)的設計目錄和要求,也為該型磨床后期的系列化產(chǎn)品提供理論基礎。(2)依照五軸數(shù)控工具磨床的模塊劃分結(jié)果,研究了該型磨床結(jié)構(gòu)模塊下各非標準件的設計以及標準件的計算、選型與校核工作;同時基于SolidWorks三維造型平臺,探討并完成了磨床的零部件建模和整機的虛擬裝配過程。(3)基于虛擬樣機技術,在有限元軟件的幫助下,研究了磨床各關鍵結(jié)構(gòu)部件的靜態(tài)特性與自由振動下的動態(tài)響應,校核設計方案的合理性,為優(yōu)化設計提供方向依據(jù)與指導。(4)重點研究了磨床立柱的優(yōu)化設計方法,在虛擬樣機的實驗環(huán)境下,通過組合實驗、統(tǒng)計分析以及響應面擬合,得到了磨床立柱各優(yōu)化目標函數(shù)對主要設計參數(shù)的響應規(guī)律,并基于遺傳算法尋找到各設計參數(shù)組合的最優(yōu)解。(5)研究了磨床磨削系統(tǒng)裝配體的受迫振動響應特性,通過諧響應分析得到了所關注的工況點在一定激勵頻率范圍內(nèi)振動幅值的響應曲線,預測了低階的共振頻率段,驗證了設計方案的合理性。
[Abstract]:With the continuous development of industry, the requirements of modern mechanical manufacturing for parts are becoming more and more stringent, and the performance of machining tools is facing a higher challenge.The machining difficulties of modern NC tools are mainly reflected in the grinding of superhard materials and the fitting of advanced surfaces, which puts forward a higher level requirement for NC tool grinders with cutting tools.The development level of five-axis CNC tool grinder, as an important cornerstone of national industrial competitiveness, has become one of the research hotspots of advanced tool grinder.In this background, based on the machining requirements of a certain manufacturer, the mechanical structure of the first generation of 5-axis CNC tool grinder is designed with the virtual prototyping technology, and the virtual prototype of the digital grinder is static.According to the analysis results, the optimization and evaluation of the design scheme are completed.The use of virtual prototyping technology greatly shortens the research and development period of grinding machine and provides the theoretical basis and data support for the manufacture of the experimental prototype of this type of five-axis CNC tool grinder.The main contents of this paper are as follows: (1) based on the modular design idea, the establishment of functional modules of five-axis CNC tool grinder is studied, and the design catalogue and requirements of grinding machine structure are defined.It also provides a theoretical basis for the series of products in the later stage of the grinding machine.) according to the result of module partition of the five-axis CNC tool grinder, the design of the non-standard parts and the calculation, selection and checking of the standard parts under the structural module of the grinding machine are studied.At the same time, based on SolidWorks 3D modeling platform, the part modeling of grinding machine and the virtual assembly process of the whole machine are discussed and completed. (3) based on virtual prototyping technology, with the help of finite element software,The static characteristics and dynamic response of the key structural components of the grinder under free vibration are studied, the rationality of the design scheme is checked, and the optimum design method of the grinding machine column is studied, which provides the direction and guidance for the optimum design.In the virtual prototype experimental environment, through combination experiment, statistical analysis and response surface fitting, the response law of each optimized objective function of grinding machine column to the main design parameters is obtained.Based on genetic algorithm (GA), the forced vibration response of the assembly of grinding system is studied.By means of harmonic response analysis, the response curves of vibration amplitude in a certain range of excitation frequency are obtained, and the low order resonance frequency section is predicted, which verifies the rationality of the design scheme.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TG596

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