摘要
建立了高速铣削系统动力学模型以及基于动态铣削厚度的多齿动态铣削力模型,并由此推导出轴向临界切深的理论公式;通过基于力锤激振的模态分析实验,测得机床-刀具系统的模态参数;进行ADC12铝硅合金高速铣削实验,测得铣削力以及表面粗糙度数值,求得其切削力系数;结合以上实验,利用MATLAB软件绘制出稳定性叶瓣图,并通过检测加工工件表面质量验证了其准确性;改变模态参数数值,研究分析了机床-刀具系统的固有频率、阻尼比以及刚度对铣削稳定性的影响。研究表明该方法对于提高加工效率以及改进机床性能具有一定的实际意义。
High speed milling system dynamics model and dynamic milling force model based on dynamic milling thickness were established, and thus deduced the theoretical formula of axial critical cutting depth, The modal parameters of machine-tool system were obtained through the hammer excitation experiment ;Milling force and surface roughness were gained by high speed milling experiment on ADC12 aluminum al-loy, and thus calculated the coefficient of cutting force;Combining the above experiments, drew the stabili-ty lobes diagram by MATLAB , and its accuracy was verified by testing machining surface quality. Chan-ging modal parameter value, studied the influence of natural frequency, damping ratio and stiffness on the machine-tool system stability. Studies showed that this method has a certain practical significance for impro-ving machining efficiency and performance of machine tool.
出处
《组合机床与自动化加工技术》
北大核心
2014年第12期10-13,18,共5页
Modular Machine Tool & Automatic Manufacturing Technique
基金
国家"高档数控机床与基础制造装备"科技重大专项课题(2011ZX04015-021)
关键词
ADC12铝硅合金
高速铣削
稳定域叶瓣图
表面质量
仿真分析
ADC12 aluminum alloy
high speed milling
stability lobes diagram
surface quality
simulation analysis
