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A novel precision vibration-assisted micro-engraving system was developed by the integration of fast tool servo and ultrasonic elliptical vibration system, in which the flexure hinge was designed to avoid backlash and PID control algorithm was established to guarantee specific precision. Apart from experimental validation of the performance of the system, various micro-V-grooves cutting experiments on aluminum alloy, ferrous material and hard cutting material were performed, in which Kistler force sensor was used to measure cutting force. Through experiments, it was clear that the vibration-assisted micro-engraving system can ensure good quality of micro-V-grooves and reduce cutting force by about 60% compared with traditional removal process without ultrasonic vibration. 相似文献
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对寒地水稻移栽田稗草和阔叶杂草的防治使用瑞飞特、阿罗津、拜田净、马歇特、加草克星二次封闭分别水在稻插秧前5～7天和水稻移栽后15～20天进行施药保持水层5～7天和稻杰一次性茎叶喷雾,对稗草、阔叶杂草防治效果好,提高了对水稻的安全性。 相似文献
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利用对比的方法研究不同药剂对水稻病害的防治效果,结果表明：在水稻生育期,对稻瘟病,和鞘腐病防治效果较好的是2％加收米加50％多菌灵、2％加收米加45％咪鲜胺和5％高扑。 相似文献
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