共查询到20条相似文献,搜索用时 78 毫秒
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分析了圆柱磨轮数控展成超声磨削平行直纹面时的刀具空间位置,介绍了数控展成超声磨削成形加工机床的总体结构,论述了磨轮主轴部件设计及主轴驱动方案,实现了主轴变频调速控制系统软硬件设计。采用研制的磨轮主轴部件进行了数控展成超声磨削陶瓷直纹面工艺试验,试验结果表明主轴部件及驱动控制系统运行良好。 相似文献
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介绍了数控展成电解磨床的结构与运动、组合式四轴联动数控系统以及直纹展成电解磨削整体叶轮叶片型面的数学模型。对整体叶片的叶片型面进行了平行直纹展成电解磨削。 相似文献
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利用UG软件生成数控轨迹,只需一次走刀即可实现对一不锈钢整体直纹面叶轮的开粗加工,足见其效率之高。 相似文献
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Bahman Azarhoushang Taghi Tawakoli 《The International Journal of Advanced Manufacturing Technology》2011,57(9-12):945-955
Ceramic matrix composites (CMCs) are promising materials for many high-technology engineering applications in harsh and severe environments due to their superior properties. However, in spite of all advantages, the employment of CMCs has been impeded by their high machining and finishing costs. Many of recently developed CMCs are very difficult to machine with the conventional machining technology, and improvement of the existing machining process is required and crucial. To overcome the existing technological constraints in the grinding of CMCs, a special designed block sonotrode was invented (and was registered for patent). The realization of ultrasonic-assisted machining on conventional machine tools can be carried out with much less effort by means of the new invented system. The invented block sonotrode is a specially designed perforated plate and demonstrates a multi-resonant frequency behavior. Experimental results illustrate the high performance of the presented method. A significant reduction in grinding forces and surface roughness and an increase in G-ratio have been achieved. 相似文献
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目前,应用先进的数控技术,提高生产效率和加工精度,已经成为机床用户的迫切要求.在量大面广的普通平面磨床上,加装数控系统后成为数控平面磨床,这对电气系统的设计提出了很高的要求. 相似文献
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工程陶瓷磨削表面残余应力测试 总被引:7,自引:1,他引:7
作为特殊的硬脆工程材料,陶瓷零件的断裂强度和韧性对表面应力状态异常敏感,测试其表面应力有重要意义。 阐述X射线法的测试原理和方法,建立微挠度法的测试模型,介绍压痕裂纹法、剥层法、云纹法的测试原理。比较各种方 法,提出探求一种更精确、更经济、更实用的测量方法是非常迫切的课题。 相似文献
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针对三维曲面数控磨削 ,设计测量仪 ,其和数控磨削系统相配合 ,完成砂轮磨损的测量和补偿 ,提高了三维曲面磨削精度及砂轮耐用度 ,并应用于电视机尾锥玻壳模具的磨削 相似文献
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J. Xie R. M. Zhou J. Xu Y. G. Zhong 《The International Journal of Advanced Manufacturing Technology》2010,48(9-12):905-912
In computer numerical control (CNC) grinding of free-form surface, an ideal arc profile of trued diamond grinding wheel is generally employed to plan 3D tool paths, whereas its form-truing errors greatly influence the ground form accuracy. A form-truing error compensation approach is proposed by using an approached wheel arc profile to replace the previously designed ideal one. The objective is to directly compensate the trued wheel arc-profile errors. It may avoid the time consumption of traditional approach that compensates the measured coordinate point errors of workpiece to an iterative grinding operation. First, the 3D tool path surface was constructed to plan the 3D tool paths. Second, the CNC arc truing of grinding wheel was conducted to analyze the form-truing error distribution relative to the applied wheel arc profile. Then, the form-truing error compensation was carried out in CNC envelope grinding. Finally, the iterative closest point (ICP) algorithm was used to match the measured coordinate points of workpiece to ideal free-form surface. It is shown that the 3D tool path surface constructed is practicable to plan arbitrary 3D tool paths for the form-truing error compensation. The ICP matching may be used to investigate 3D ground form error distribution. It is confirmed that the form-truing error compensation can directly improve the 3D ground form accuracy. It may decrease the 3D ground form error by about 20% when the 2D form-truing error is reduced by about 58% using the same truing conditions for CNC grinding. 相似文献
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纳米陶瓷涂层磨削表面残余应力的研究进展 总被引:2,自引:0,他引:2
纳米陶瓷涂层材料具有高硬度和高耐磨性,采用超硬磨料的金刚石砂轮磨削是其最主要的加工方法,在磨削时容易出现表面残余应力而导致表面裂纹.目前,国外在纳米结构陶瓷涂层磨削表面残余应力的研究很少,我国正在对纳米陶瓷涂层材料超精密磨削后表面残余应力方面进行研究.介绍了纳米结构陶瓷涂层的研究背景,阐述了纳米结构陶瓷喷涂材料性能特点,分析了纳米结构陶瓷涂层的磨削研究动态和磨削表面残余应力的研究现状.分析研究表明,纳米结构陶瓷涂层的开发与研究将会受到越来越广泛的重视,其后续研究将是下一步的工作重点. 相似文献
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Chen Fan Mei Guojian Zhao Bo Bie Wenbo Li Guangxi 《Journal of Mechanical Science and Technology》2020,34(1):333-344
Journal of Mechanical Science and Technology - Three-dimensional (3D) ultrasonic vibration-assisted ELID grinding, which combines 3D ultrasonic vibration-assistance with electrolytic in-process... 相似文献
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工程陶瓷磨削表面残余应力的数学模型 总被引:2,自引:0,他引:2
作为特殊的硬脆工程材料,陶瓷零件的断裂强度和韧性对表面应力状态异常敏感,建立相应的数学模型是研究残余应力的理论基础。本文阐述了陶瓷材料在磨削过程中的弹塑性变形数学模型,建立了磨削温度模型,介绍了利用磨削参数进行编码的二次回归模型,从而为预测和控制残余应力数值及性质提供指导。 相似文献