PCB钻床Z轴钻孔机构的动力学分析与结构改进
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摘要
PCB钻床钻孔机构是钻孔设备的重要组成部分,它通过Z轴方向上下运动实现钻孔。首先,对钻床Z轴钻孔机构进行结构介绍;然后,对钻孔机构下钻时产生的钻孔偏差和孔径质量进行分析,简化钻孔机构的模型结构,应用罗伯森-维滕堡(R/W)方法对Z轴钻孔机构进行多刚体系统动力学分析,发现钻孔机构中连接件对钻孔机构的动态特性有着重要的影响;最后对原整体式连接件进行结构改进,改为调心机构,调心机构通过增加压簧以缩小机构传动间隙、增加预拉力、改善动力学特性,从而减少钻孔机构下钻时产生的偏差,提高钻孔质量。
The drilling mechanism of PCB drilling machine is an important part of the drilling equipment, and it can drill through Z-axis up and down movement. Firstly, this paper introduces the structure of Z-axis drilling mechanism of drilling machine, and then analyzes the drilling deviation and hole diameter quality produced by drilling mechanism, and simplifies the model structure of drilling mechanism. The dynamic analysis of Z-axis drilling mechanism with multi-rigid-body system is carried out by using R/W method. It is found that the connectors in the drilling mechanism have important influence on the dynamic characteristics of the drilling mechanism. Finally, the original integral connector is improved to be a kind of aligning mechanism. In the centering mechanism, the pressure spring is added to reduce the transmission clearance, and to increase the pre-tension and improve the dynamic characteristics, so as to reduce the deviation and improve the drilling quality.
The drilling mechanism of PCB drilling machine is an important part of the drilling equipment, and it can drill through Z-axis up and down movement. Firstly, this paper introduces the structure of Z-axis drilling mechanism of drilling machine, and then analyzes the drilling deviation and hole diameter quality produced by drilling mechanism, and simplifies the model structure of drilling mechanism. The dynamic analysis of Z-axis drilling mechanism with multi-rigid-body system is carried out by using R/W method. It is found that the connectors in the drilling mechanism have important influence on the dynamic characteristics of the drilling mechanism. Finally, the original integral connector is improved to be a kind of aligning mechanism. In the centering mechanism, the pressure spring is added to reduce the transmission clearance, and to increase the pre-tension and improve the dynamic characteristics, so as to reduce the deviation and improve the drilling quality.
引文
[1] 张冬冬.新型PCB数控钻床的动力学分析与研究[D].成都:西华大学,2013.
[2] 马飞达,蔡长韬,蔡良金.基于Solidworks印制板钻床Z轴的虚拟装配[J].制造技术与机床,2013(5):80-83.
[3] 王忠林,王英章,高中涛.印制电路板孔加工精度影响因素分析[J].印制电路信息,2004(10):20-24.
[4] LIN C W.Design parameter sensitivity analysis of high-speed motorized spindle systems considering high-speed effects[C]//International Conference on Mechatronics & Automation.Harbin:IEEE RAS,2007:2087-2092.
[5] 张冬冬,郭凡,赵恒文.PCB数控钻床工作台支撑板结构的设计优化[J].南阳理工学院学报,2016,8(6):43-47.
[6] 李坚,王英章,张力,等.PCB数控钻床下钻机构多体动力学分析与研究[J].计算机仿真,2006(11):240-242,317.
[7] 袁士杰,吕哲勤.多刚体系统动力学[M].北京:北京理工大学出版社,1992.
[2] 马飞达,蔡长韬,蔡良金.基于Solidworks印制板钻床Z轴的虚拟装配[J].制造技术与机床,2013(5):80-83.
[3] 王忠林,王英章,高中涛.印制电路板孔加工精度影响因素分析[J].印制电路信息,2004(10):20-24.
[4] LIN C W.Design parameter sensitivity analysis of high-speed motorized spindle systems considering high-speed effects[C]//International Conference on Mechatronics & Automation.Harbin:IEEE RAS,2007:2087-2092.
[5] 张冬冬,郭凡,赵恒文.PCB数控钻床工作台支撑板结构的设计优化[J].南阳理工学院学报,2016,8(6):43-47.
[6] 李坚,王英章,张力,等.PCB数控钻床下钻机构多体动力学分析与研究[J].计算机仿真,2006(11):240-242,317.
[7] 袁士杰,吕哲勤.多刚体系统动力学[M].北京:北京理工大学出版社,1992.