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薄壁件加工系统动态响应分析
Dynamic response analysis of thin wall workpiece processing system
投稿时间:2017-11-29  修订日期:2018-01-27
DOI:
中文关键词:  主轴  刀具  薄壁工件  连续梁模型  共振  动态响应
英文关键词:spindle  tool  thin-walled workpiece  continuous beam model  resonance  dynamic response
基金项目:国家自然科学基金(51105084)
作者单位E-mail
农胜隆 广西科技大学鹿山学院 nsl0771@163.com 
高尚晗 广西科技大学机械学院  
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中文摘要:
      薄壁件在铣削加工中容易产生共振或变形,直接影响加工稳定性及加工精度。本文采用主轴-刀具-工件整体铣削系统连续梁模型,系统研究在动态铣削力作用下,刀具端部与工件端部的动态响应之间的相互影响关系。研究对整体系统动态响应影响较大的薄壁件尺寸。研究结果发现,工件横截面高度对系统共振的影响较为明显,当高度尺寸较小时,工件的低频共振会通过动态铣削力直接反映到刀具端部的振动频响上。工件横截面底边宽度尺寸的增大虽然对共振频率的改变没那么明显,但会导致激发出来的刀具共振幅度出现明显降低。研究成果可以为薄壁件铣削加工系统的稳定性控制提供理论基础。
英文摘要:
      In thin-walled workpiece processing, the resonance and deformation easily occur and directly affect the machining stability and accuracy. This paper adopts the continuous beam model of whole milling system, which includes spindle, tool and the workpiece, to study the effects of the dynamic milling force on the relationship of dynamic responses between the tool end and workpiece end. The sizes of parts which have the significant influences on the dynamic responsess of the whole system are studied. It is noted that the sectional height of workpiece has more obvious effects. With small height value, the low frequency resonance of workpiece is directly reflected in the vibration responses of the cutter end through the dynamic milling force. The sectional width dimension changes the resonance frequency unobviously, but it reduces the resonance amplitude of the tool end. These above results provide theoretical basis for the stability control of the thin-walled workpiece processing system.
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