超声复合电解加工在线参数检测、控制与试验研究
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摘要
超声复合电解加工的参数条件变化较大时,其系统共振条件难以维持,影响加工效率与精度。设计、构建在线参数检测与实时控制系统,选用激光、电流等高速高精传感器,进行超声频率及位移、超声发生器与脉冲电源的输出电压、电极间电参数进行在线检测,利用PCI-1706U数据采集卡、控制计算机等构建参数实时采集、控制系统,由单片机STM32控制数字电位器,实现超声参数在线检测、实时调节;电极间电压可由系统实时优化调节。采用Visual C++6.0,通过多串口类进行系统软件设计,对各信号数据进行采集、处理、显示等。进行系统自动调节与手动调节对比试验,采用参数实时控制系统进行超声复合电解加工,在保持精度条件下,能有效提高加工过程稳定性和加工效率。
The system resonance is difficult to maintain in the machining process of ultrasonic combined electrochemical machining, because a manual adjustment of ultrasonic frequency generates test error. This problem can be solved by constructing and perfecting the online parameter detection and control system of ultrasonic combined electrochemical machining. This study build the data acquisition system of the signal parameters by selecting a variety of high speed and high precision sensor, vibration displacement of tool electrode in the process of ultrasonic power and pulse power output voltage, EDM electrode current of online detection, and the use of PCI-1706 U data acquisition card; designs the vibration displacement signal of laser displacement sensor detection as the chopper voltage control signal of pulse power supply; uses digital potentiometer to replace the original mechanical potentiometer, ultrasonic power supply, the output resistance of the digital potentiometer controlled by MCU STM32 communication. By the tools of Visual C++ 6.0 design of compound ultrasonic EDM detection and control system software, through the data acquisition card library programming, data acquisition, processing, display functions including the signal detection module design parameters; design the control software module through the serial port. Compared with the manual control parameters, the control system of ultrasonic combined electrochemical machining test can guarantee precision, improve the process stability and machining efficiency.
The system resonance is difficult to maintain in the machining process of ultrasonic combined electrochemical machining, because a manual adjustment of ultrasonic frequency generates test error. This problem can be solved by constructing and perfecting the online parameter detection and control system of ultrasonic combined electrochemical machining. This study build the data acquisition system of the signal parameters by selecting a variety of high speed and high precision sensor, vibration displacement of tool electrode in the process of ultrasonic power and pulse power output voltage, EDM electrode current of online detection, and the use of PCI-1706 U data acquisition card; designs the vibration displacement signal of laser displacement sensor detection as the chopper voltage control signal of pulse power supply; uses digital potentiometer to replace the original mechanical potentiometer, ultrasonic power supply, the output resistance of the digital potentiometer controlled by MCU STM32 communication. By the tools of Visual C++ 6.0 design of compound ultrasonic EDM detection and control system software, through the data acquisition card library programming, data acquisition, processing, display functions including the signal detection module design parameters; design the control software module through the serial port. Compared with the manual control parameters, the control system of ultrasonic combined electrochemical machining test can guarantee precision, improve the process stability and machining efficiency.
引文
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[12]王艳伟,程放,周玉成.多线程CSerial Port类的多串口通信实现[J].木材加工机械,2012(2):1-4.WANG Yanwei,CHENG Fang,ZHOUYucheng.Realizing the multi-serial port communication based on the multithread Cserialport class[J].Wood Processing Machinery,2012(2):1-4.
[13]QU N S.Micro wire electrochemical machining of microarray holes[C]//Proceedings of the 15th International Symposium on Electromachining.Pittshurgh:ISEM,2007:325-328.
[2]肖强,李言,李淑娟.硬脆材料超声波精密加工机理及影响因素研究[J].兵器材料科学与工程,2010,33(3):26-28.XIAO Qiang,LI Yan,LI Shujuan.Ultrasonic precision machining mechanism and influencing factors of hard and brittle material[J].Ordnance Material Science and Engineering,2010,33(3):26-28.
[3]WANG Z H,ZHU Y W,FAN Z J,et al.Mechanism and process study of ultrasonical combinedsynchronizing pulse electrochemical micro machining[C]//The 16th International Symposium on Electro-machining(ISEM XVI).Shanghai,2010:351-355.
[4]赵万生,顾琳,康小明,等.从ISEM-XV看特种加工技术的最新进展[C]//中国机械工程年会论文集.长沙,2007.ZHAO Wansheng,GU Lin,KANGXiaoming,et al.The latest development of special processing technology from ISEM-XV[C]//Proceedings of the annual conference on mechanical engineering of China.Changsha,2007.
[5]ZHANG C,RENTSCH R,BRINKSMEIER E.Advances in micro ultrasonic assisted lapping of microstructures in hard brittle materials:A brief review and outlook[J].International Journal of Machine Tools&Manufacture,2005,45:881-890.
[6]WANG A C,YAN B H,LI X T,et al.Use of microultrasonic vibration lapping to enhance the precision ofmicroholes drilled by micro electro-discharge machining[J].International Journal of Machine Tools&Manufacture,2002,42:915-923.
[7]ZHU Y W,XU Y M,YUN N Z.The test study of ultrasonic combined electrochemical micro-machining[C]//Proceedings of The 15th International Symposium on Electromachining.University of Nebra-ska-Lincoln.Pittshurgh:ISEM,2007:493-498.
[8]陆永华,赵东标,云乃彰,等.基于六维力电解加工间隙在线检测试验研究[J].机械工程学报,2006,42(7):126-131.LU Yonghua,ZHAO Dongbiao,YUNNaizhang,et al.Experimental research of online monitoring interelectrode gap of electrochemical machining based on 6Dforces[J].Journal of Mechanical Engineering,2006,42(7):126-131.
[9]王希,赵东标,云乃彰.基于力信号和智能控制的电解加工间隙检测与控制[J].东南大学学报(自然科学版),2005,35(5):719-723.WANG Xi,ZHAO Dongbiao,YUNNaizhang.Measure and control of interelectrode gap of electrochemical machining based on force signal and fuzzy control[J].Journal of Southeast University(Natural Science Edition),2005,35(5):719-723.
[10]冯雪.数据采集卡性能指标与应用[J].工业控制计算机,2008,21(5):10-11.FENG Xue.Summarization performance index and application of data acquisition card[J].Industrial Control Computer,2008,21(5):10-11.
[11]李志刚,张峰.用VC++开发PC与PLC间的一种通讯程序[J].电子质量,2002(4):25-26.LI Zhigang,ZHANG Feng.A program with VC++for Communication between PLC and PC[J].Electronics Quality,2002(4):25-26.
[12]王艳伟,程放,周玉成.多线程CSerial Port类的多串口通信实现[J].木材加工机械,2012(2):1-4.WANG Yanwei,CHENG Fang,ZHOUYucheng.Realizing the multi-serial port communication based on the multithread Cserialport class[J].Wood Processing Machinery,2012(2):1-4.
[13]QU N S.Micro wire electrochemical machining of microarray holes[C]//Proceedings of the 15th International Symposium on Electromachining.Pittshurgh:ISEM,2007:325-328.