CAJ | 학술논문

针对铣削加工中动态铣削力难于测量的问题,提出了一种通过测量铣刀振动位移来确定动态铣削力的方法。该方法首先通过激光测振仪测量铣削加工时铣刀刀杆的振动位移,然后根据测量系统的静态校准结果由该振动位移确定相应的铣削力。针对高速铣削时的铣削力测量失真问题,通过分析刀具系统的动态特性,确定测量系统的传递函数,并采用零极点配置的方法设计了动态补偿环节对测量系统进行动态补偿,以提高测量系统的带宽。在铣削加工中心上进行了铣削加工实验,将本文方法确定的铣削力与三维力传感器测得的铣削力进行了对比。实验结果表明：本文测量方法能准确测量动态铣削力,测量系统的测量带宽可达1600 Hz,且测量方法简单可靠,易于工程应用。
침대선삭가공중동태선삭력난우측량적문제,제출료일충통과측량선도진동위이래학정동태선삭력적방법。해방법수선통과격광측진의측량선삭가공시선도도간적진동위이,연후근거측량계통적정태교준결과유해진동위이학정상응적선삭력。침대고속선삭시적선삭력측량실진문제,통과분석도구계통적동태특성,학정측량계통적전체함수,병채용령겁점배치적방법설계료동태보상배절대측량계통진행동태보상,이제고측량계통적대관。재선삭가공중심상진행료선삭가공실험,장본문방법학정적선삭력여삼유력전감기측득적선삭력진행료대비。실험결과표명：본문측량방법능준학측량동태선삭력,측량계통적측량대관가체1600 Hz,차측량방법간단가고,역우공정응용。
Aiming at the problem that the dynamic cutting force in milling process is difficult to measure, a method that determines the dynamic milling force through measuring the vibration displacement of milling cutter bar is put forward. This method firstly measures the cutter bar vibration displacement in milling process with a laser doppler vibrometer (LDV), and then determines the corresponding milling force from the vibration displacement according to the static calibration results of the measuring system. Aiming at the distortion problem of the measured milling force in high-speed milling process, the transfer function of the measuring system is determined through analyzing the dynamic characteristics of the cutting tool system; and a dynamic compensation link is designed adopting the zero pole assignment method to compensate the dynamic characteristics of the measuring system in order to improve the measuring bandwidth. The milling experiments were conducted on a milling machining center; and comparison was performed between the milling forces measured with the proposed method and obtained using a three-dimensional force sensor. Experiment results show that the proposed measuring method can measure the dynamic milling force accurately, and the frequency bandwidth can reach 1600 Hz. Besides, the measuring method is simple, reliable and easy to be used in engineering application.