机械工程学报
機械工程學報
궤계공정학보
CHINESE JOURNAL OF MECHANICAL ENGINEERING
2010年
1期
92-99
,共8页
直线导轨结合部%滚珠丝杠副%动态刚度特性参数%赫兹接触理论
直線導軌結閤部%滾珠絲槓副%動態剛度特性參數%赫玆接觸理論
직선도궤결합부%곤주사강부%동태강도특성삼수%혁자접촉이론
Joint of linear guideway%Ball screw%Dynamic stiffness characteristic parameters%Hertz contact theory
借助弹性力学中的赫兹接触理论,分析计算直线滚动导轨的线刚度、滚珠丝杠副和角接触球轴承的轴向刚度,建立带滚珠丝杠副的机床直线导轨结合部的动力学特性理论模型,开发了计算软件;以一款立式加工中心为研究对象,分析计算带滚珠丝杠副直线导轨结合部动态刚度,着重讨论工作载荷对结合部动态刚度的影响规律,基于有限元法分析含结合部动态参数的加工中心整机动态特性.研究结果不仅突破了目前机床直线导轨结合部刚度模型不考虑滚珠丝杠副之缺陷,而且与传统的参数识别法和有限元法相比,具有物理概念清晰、计算过程简单等特点.
藉助彈性力學中的赫玆接觸理論,分析計算直線滾動導軌的線剛度、滾珠絲槓副和角接觸毬軸承的軸嚮剛度,建立帶滾珠絲槓副的機床直線導軌結閤部的動力學特性理論模型,開髮瞭計算軟件;以一款立式加工中心為研究對象,分析計算帶滾珠絲槓副直線導軌結閤部動態剛度,著重討論工作載荷對結閤部動態剛度的影響規律,基于有限元法分析含結閤部動態參數的加工中心整機動態特性.研究結果不僅突破瞭目前機床直線導軌結閤部剛度模型不攷慮滾珠絲槓副之缺陷,而且與傳統的參數識彆法和有限元法相比,具有物理概唸清晰、計算過程簡單等特點.
차조탄성역학중적혁자접촉이론,분석계산직선곤동도궤적선강도、곤주사강부화각접촉구축승적축향강도,건립대곤주사강부적궤상직선도궤결합부적동역학특성이론모형,개발료계산연건;이일관입식가공중심위연구대상,분석계산대곤주사강부직선도궤결합부동태강도,착중토론공작재하대결합부동태강도적영향규률,기우유한원법분석함결합부동태삼수적가공중심정궤동태특성.연구결과불부돌파료목전궤상직선도궤결합부강도모형불고필곤주사강부지결함,이차여전통적삼수식별법화유한원법상비,구유물리개념청석、계산과정간단등특점.
A dynamic model of linear guideway joint with ball screw is built by means of the linear stiffness of linear rolling guideway and the axial stiffness of ball screw and angular contact ball bearing, which can be calculated by using the Hertz Contact Theory of elastic mechanics, and related computer program for calculating the contact stiffness is developed. A vertical machining centre is selected as an example, the effect of cutting load on the dynamic stiffness of joint part is analyzed, and the dynamic characteristics of the entire machine tool with the joint stiffness considered are also discussed on the basis of finite element method. The analytical results show that it can not only overcome the shortcoming of the conventional method in without considering the effect of ball screw pair, but also appear clarity in physical concept and simplification in computation.
