组合机床与自动化加工技术
組閤機床與自動化加工技術
조합궤상여자동화가공기술
MODULAR MACHINE TOOL & AUTOMATIC MANUFACTURING TECHNIQUE
2014年
8期
119-121
,共3页
超精密加工%超高速加工%微铣削主轴%微铣削刀具%转子动力学
超精密加工%超高速加工%微鐉削主軸%微鐉削刀具%轉子動力學
초정밀가공%초고속가공%미선삭주축%미선삭도구%전자동역학
ultra-precision machining%high speed machining%micro-milling spindle%micro milling tools%ro-tor dynamics
微铣削主轴刀具系统是超精密超高速微铣削加工技术的核心,其性能好坏直接影响微铣削加工效果。通过对微细加工主轴刀具系统进行建模与分析,探讨该系统中对微细加工过程影响明显的特性,求出了该系统的临界转速以及各阶模态振型,分析微铣削刀具悬伸量同临界转速、各阶模态振型的关系以及刀尖跳动的关系。通过分析发现,刀具悬伸量变大,主轴刀具系统低级临界转速基本不变,而高阶临界转速迅速下降,同时低阶振型下刀尖点的位移变化较大,而高阶振型下变化较小。在实际加工中要综合考虑主轴与刀具系统的动力学特性,从而优化配置主轴刀具系统配置,提升微细切削加工性能。
微鐉削主軸刀具繫統是超精密超高速微鐉削加工技術的覈心,其性能好壞直接影響微鐉削加工效果。通過對微細加工主軸刀具繫統進行建模與分析,探討該繫統中對微細加工過程影響明顯的特性,求齣瞭該繫統的臨界轉速以及各階模態振型,分析微鐉削刀具懸伸量同臨界轉速、各階模態振型的關繫以及刀尖跳動的關繫。通過分析髮現,刀具懸伸量變大,主軸刀具繫統低級臨界轉速基本不變,而高階臨界轉速迅速下降,同時低階振型下刀尖點的位移變化較大,而高階振型下變化較小。在實際加工中要綜閤攷慮主軸與刀具繫統的動力學特性,從而優化配置主軸刀具繫統配置,提升微細切削加工性能。
미선삭주축도구계통시초정밀초고속미선삭가공기술적핵심,기성능호배직접영향미선삭가공효과。통과대미세가공주축도구계통진행건모여분석,탐토해계통중대미세가공과정영향명현적특성,구출료해계통적림계전속이급각계모태진형,분석미선삭도구현신량동림계전속、각계모태진형적관계이급도첨도동적관계。통과분석발현,도구현신량변대,주축도구계통저급림계전속기본불변,이고계림계전속신속하강,동시저계진형하도첨점적위이변화교대,이고계진형하변화교소。재실제가공중요종합고필주축여도구계통적동역학특성,종이우화배치주축도구계통배치,제승미세절삭가공성능。
Micro-milling spindle tool system is the core of ultra-precision and ultra high-speed micro-milling technology, which directly affects the performance of the micro-milling effect. Through modeling and analy-sis of spindle micromachining system, characteristics of spindle micromachining that significantly affect the micromachining process are studied. Critical speeds and first 6 order modal shapes of the system are ob-tained. The relationship between micro-milling tool overhang and the critical speeds and first 6 order modal shapes of the system is analyzed, so is the relationship between tool tip runout and critical speeds and first 6 order modal shapes of the system. The analysis revealed that the tool overhang becomes larger, the lower the critical speed of the spindle tool system basically unchanged, while the higher-order critical speed de-creased rapidly. The position of the tool nose points under the lower order modes changes more, while small change happens under higher modes. The dynamics of spindle tool system need to be analyzed in order to obtain the optimal overhang of the tool corresponding to spindle to improve the micromilling process.