摘要：具有时变断续冲击、多点变约束、抱紧装置动态夹持等特点的八米丝杠旋风铣床，会在加工过程中产生复杂的动态响应，特别是机床固有颤振频率对加工效率、加工精度有较大的影响。
为选择合理的加工参数来抑制机床在加工过程中的颤振，并提高加工精度，本文首先使用matlab软件，建立大型螺纹旋风铣削系统动力学模型，其中全面考虑了工件自重以及自转、随动抱紧装置等因素。其次建立基于再生颤振理论，建立等幅谐波曲线振动表面的圆弧形切屑切削数值模型，再基于所得出的动力学模型进行临界切削宽度的切削稳定性分析。切削稳定性分析所获得的叶瓣图，可以显示加工稳定区域与不稳定区域，能获得刀盘转速在100-700r/min状态下的合适加工参数，避免颤振工作状态。
最后为了获得精确模型参数，本文提出了浮动支撑力与抱紧力测力装置的设计与三个传感器不同布局方案并作出了比较。根据总结与对比，若能保证X方向安装精度误差并忽略不同测量方法的误差，建议采用均布载荷-四简支方案。
关键词 螺纹硬旋铣 切削稳定性 再生颤振 抱紧装置 传感器布局
毕业设计说明书外文摘要
Title study on cutting stability of ball screw hard whirling
Abstract：The eight-meter CNC whirling machine produces complex dynamic response, especially damping machine processing efficiency and processing accuracy due to machine vibration frequency, with the characteristics of time-varying impact, multi-point variable floating support, and dynamic clamping of hold device. In order to select the reasonable machining parameters to suppress the flutter and improve machining precision, firstly, Matlab is used to establish dynamic model of the large-scale screw cyclone milling system, which takes into account the factors such as the weight of the work piece and the rotation and follow-up fastening device.
Secondly, the numerical model of circular arc chip cutting is established based on the theory of regenerative flutter, and the cutting stability analysis of critical cutting width is carried out based on this obtained kinetic model. The obtained lobe diagram displays the processing of stable areas and unstable areas. This lobe diagram can get the appropriate processing parameters whose cutter speed is around 100-700r/min, which avoids the situation of chatter vibration.
Finally, in order to obtain the accurate model parameters, the design of the floating support measuring force device is put forward and three different schemes are compared and summarized. According to the summary and comparison, if accuracy of X direction installation errors and the error of different measurement methods can be ensured, this paper will propose the uniform load - four simple scheme.
Keywords screw hard whirling, cutting tability, regeneration flutter, hold-device, sensor layout scheme
目 次
1 绪论 1
1.1 引言 1
1.2 课题研究背景及工作 2
1.2.1 硬态旋铣动力学模型研究现状 3
1.2.3 抱紧力测量装置研究现状 6
1.3 课题主要研究内容 6
2 大型螺纹旋风铣削系统的动力学建模 8
2.1 引言 matlab滚珠丝杠硬态旋铣切削稳定性研究:http://www.chuibin.com/jixie/lunwen_205777.html