共查询到16条相似文献,搜索用时 125 毫秒
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微细深孔超声轴向振动钻削装置的设计 总被引:1,自引:0,他引:1
基于高频振动切削原理 ,设计了一种振频 2 0± 1KHz、振幅 2 5 μm的新型超声轴向振动钻削装置 ,该装置由数字锁相环频率自动跟踪式晶体管型超声波发生器、轴向半波长圆柱型压电陶瓷换能器、半波谐振圆锥型变幅杆以及工具系统组成 ,可在软质材料上实现微细深孔的精密、超精密加工 相似文献
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深孔超声轴向振动钻削装置的设计与研究 总被引:1,自引:0,他引:1
根据振动切削机理对超声振动钻削和普通钻削进行了分析比较,设计出一种在摇臂钻床上加工小直径深孔的超声轴向振动钻削装置。并分析了超声振动钻削装置设计中的一些关键技术问题,为在摇臂钻床上加工小直径深孔提供了一种新的工艺途径。 相似文献
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提出了在加工刀具施加压电振动,产生脉冲切削,使刀具对加工表面进行复合钻削加工的工艺方法.设计了基于压电振动的切削加工装置,实验结果表明,压电振动切削加工钻削加工方法可以提高切削加工的加工精度及加工效率,特别适用于在对钛合金、耐热不锈钢、高强钢、复合材料等高硬度、高韧性、高强度、高熔点材料进行微钻切削加工. 相似文献
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麻花钻钻孔是机械加工领域最为常用的孔加工方法。传统麻花钻钻孔加工中,特别是对一些难加工材料进行钻孔加工时,存在轴向力大、表面质量差等诸多问题。超声振动辅助钻削属于振动钻削技术的一种,即在钻孔过程中在麻花钻上施加大于15 kHz的高频振动,钻头的周期性振动改善了切削刃工作状况,可在一定程度上解决难加工材料制孔难题。介绍超声振动辅助钻削技术的分类、技术特点和系统组成的基础上,从动力学研究、振动断屑理论研究、切削力研究、精度及加工质量研究、在新材料上的应用和超声振动钻削装置六个方面论述了超声振动辅助钻削理论和技术的国内外研究进展。基于超声振动辅助钻削技术的发展现状,结合航空航天等领域难加工材料制孔技术的需求,从理论研究、超声振动系统开发完善、新材料工艺研究、专用超声辅助钻削机床开发以及超声振动辅助加工规范标准制定等方面指出了现有研究和应用中存在的问题并对未来发展趋势做以展望。 相似文献
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超声振动钻削是振动切削的一个分支,与普通钻削相比具有较好的加工工艺效果,它能全面提高孔的加工质量,是现代钻削技术的一个重要的发展方向.文章评述了提高孔的加工质量的必要性,超声振动钻削技术的概念、基本原理及其特点,介绍了国内外的研究现状,指出该项技术存在的问题,并对其今后的研究方向作了展望,振动钻削将朝着自动化、智能化的方向发展. 相似文献
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用有限元法研究微细钻头振动钻入动力学特性 总被引:3,自引:2,他引:3
基于切削和振动理论 ,利用有限元技术对微细钻头振动钻入动力学特性进行了深入地研究。分析结果表明 ,振动钻削改变了普通钻削的钻入机理 ,显著提高了钻入定心精度 ,特别适合微小孔的精密和超精密加工。 相似文献
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A new ultra-precision sculpturing method in micro/nano scale for difficult-to-cut materials is proposed in the present research. Elliptical vibration cutting technology is well-known for its excellent performance in achieving ultra-precision machining of steel materials with single crystal diamond tools. Elliptical vibration locus is generally controlled and held to a constant in practice. On the contrary, the proposed method utilizes the variations of the elliptical vibration locus in a positive manner. Depth of cut can be actively controlled in elliptical vibration cutting by controlling vibration amplitude in the thrust direction. By utilizing this as a fast tool servo function in elliptical vibration cutting, high performance micro/nano sculpturing can be attained without using conventional fast tool servo technology. A high-speed amplitude control system is developed for elliptical vibration, with a bandwidth of more than 300 Hz, where the vibration amplitude can be controlled within 4 μmp-p. The developed control system is applied to sculpturing ultra-precision nano textured grooves on hardened steel with single crystal diamond tools. It is confirmed that the textured grooves have the desired shapes, and their profiles agree well with the vibration amplitude commands input to the control system. Further, a high performance micro/nano sculpturing system for plane surfaces is developed, where the vibration amplitude is controlled in synchronization with the planing motion of an ultra-precision machine tool. Nano sculpturing experiments on hardened steel, carried out by the developed system, are reported, as well as consequent picture images and a variety of dimple patterns that were formed successfully on the hardened steel as nano-scale sculptures. 相似文献
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In electrical discharge machining, both the gas and liquid dielectric have unique advantages and inevitable disadvantages. The mist medium with a special property between gas with liquid is expected to have a better performance in EDM. In this paper, the performance of mist deionized water jet has been studied based on the disadvantages of deionized water in deep micro hole drilling: electrolysis action, electrophoresis action and gap-contamination by debris. Based on the analyzation on the advantages of mist jet, three projects of experiments have been done to verify its performance on the suppressing of electrolysis action and improving the debris exhaust. The results show that the micro EDM drilling with high machining speed and accuracy can be realized with mist jet. This method is particularly effective in deep micro hole drilling, since deeper holes can be obtained at faster machining speed with mist jet due to its significant improvement in debris exhaust. 相似文献
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利用有限元技术对微细钻头超声轴向振动钻入横向偏移过程进行深入分析。结果表明,超声轴向振动钻削从根本上改变了普通钻削的钻入机理,减小了横向偏移量,提高了钻入定心精度,特别适合硬脆材料上的微小孔的精密和超精密加工。 相似文献