摘要
为了获得金属切削过程中的合理夹紧力,减少薄板件的铣削变形,将PLC技术应用到机床夹具的设计中,设计了夹紧力大小可动态调控的液压夹具系统(HFAC)。HFAC系统包括夹紧机构、液压系统和控制机构,通过PLC闭环控制调节电液比例减压阀的出口压力,以使系统获得高精度夹紧力,并实现夹紧力的动态调控。实验结果表明,HFAC系统可实时调节机床夹具的夹紧力,其夹紧力控制精度为3%左右,即系统具有良好的稳定性以及较高的夹紧力控制精度。
In order to solve the probtems of deformation control of thin part milling with optimal clamping force, a hydraulic fixture with ad- justable damping force online（HFAC） was designed based on PLC technology. The HFAC system was composed of clamping mechanism, hydraulic system and control mechanism. The real-time closed-loop control of PLC was used to adjust the outlet pressure of the electro-hy- draulic proportional pressure reducing valve, the high-precision clamping force was obtained and the automatic control function of pressure on line was realized. The test results show that, the HFAC system can real-time adjust the clamping force under the machining requirements, and the control precision of clamping force is about 3% ,namely it has good stability and higher control precision of clamping force.
出处
《机电工程》
CAS
2013年第7期852-855,共4页
Journal of Mechanical & Electrical Engineering
基金
国家自然科学基金资助项目(5117304)
国家高技术研究发展计划("863"计划)资助项目(2012AA040903)
关键词
夹紧力可调的液压夹具系统
变形控制
PLC
hydraulic fixture with adjustable clamping force online（HFAC）
deformation control
PLC
