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摘 要
隨著計(jì)算機(jī)的普及和計(jì)算速度的提高，有限元分析已越來(lái)越廣泛地應(yīng)用到工程分析計(jì)算問(wèn)題，其分析手段已成為現(xiàn)代機(jī)械設(shè)備CAE分析的主流方法，也是解決我國(guó)機(jī)械產(chǎn)品設(shè)計(jì)分析水平落后的關(guān)鍵手段之一。主軸滑枕是機(jī)床中一種必不可少的通用零部件，亦是影響機(jī)床工作性能的薄弱環(huán)節(jié)。
本論文的主要目的就是針對(duì)機(jī)床主軸關(guān)鍵部件——滑枕進(jìn)行相關(guān)分析。采用Ansys命令流方式建立高速數(shù)控機(jī)床主軸滑枕實(shí)體分析模型（其中加強(qiáng)筋厚度給出了三種，分別為15mm，20mm，25mm），并對(duì)他們?cè)诨瑒?dòng)軸承支撐、高速旋轉(zhuǎn)條件下動(dòng)力學(xué)行為進(jìn)行有限元分析，求解出系統(tǒng)模態(tài)頻率、模態(tài)振型、瞬態(tài)動(dòng)力響應(yīng)和周期激勵(lì)下諧響應(yīng)譜，在分析的基礎(chǔ)上進(jìn)行比較，確定系統(tǒng)的薄弱環(huán)節(jié)，對(duì)大型龍門銑床主軸滑枕的結(jié)構(gòu)變形規(guī)律，給出了定性分析結(jié)論，選擇出了三種加強(qiáng)筋厚度中最優(yōu)的一種，同時(shí)，在分析的基礎(chǔ)上提出了一些改進(jìn)措施，為工作中進(jìn)行機(jī)械系統(tǒng)結(jié)構(gòu)CAE分析打下良好的基礎(chǔ)，為滑枕結(jié)構(gòu)優(yōu)化設(shè)計(jì)提供理論依據(jù)和指導(dǎo)。
關(guān)鍵詞：CAE；主軸滑枕；有限元分析；變形分析；改進(jìn)措施
Abstract
With the development of computers and the speed of calculation, finite element analysis has become increasingly widely in the calculation of engineering analysis, of which analysis methods has become the mainstream of CAE analysis methods, and the analytical tools has become one of the key method to solve the problem of the level of product design behind about our country mechanical analysis. Spindle ram is the necessary and general components of machine tools, which is also the weak link with frequent failures.
The main purpose of this paper is to analysis the spindle - ram which is the key components for machine tool. Ansys command is used to create high-speed flow axis CNC machine tool ram model entities, and do the finite element analysis under the conditions of the sliding bearing support and the high-speed rotary dynamic behavior.Their kinetic analysis, a system for solving modal frequencies, modal vibration mode, the transient dynamic response and the cycle of harmonic excitation response spectrum. In based of the analysis to make sure the weak links in the system,and find out the large gantry milling machine spindle ram deformation of the structure for giving the conclusions of the qualitative analysis, which carry out the work of CAE analysis of the structure of mechanical systems and lay a good foundation for the structural optimization ram designed to provide the theoretical basis and guidance.
Keywords: CAE；Spindle ram；Finite element analysis；Deformation analysis；Improvement measures