共查询到20条相似文献,搜索用时 265 毫秒
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聚晶金刚石加工技术进展 总被引:2,自引:0,他引:2
介绍了国内外正在研究和已经应用的聚晶金刚石的主要加工方法,即磨削加工、研磨加工、电火花加工、激光加工、化学加工、超声加工和复合加工,并对这些加工方法的特点、机理及影响因素、适用范围进行了分析。 相似文献
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国外特种加工技术的最新进展 总被引:29,自引:0,他引:29
就当前国际特种加工技术研究的最新进展情况,从激光加工,电解加工,超声加工尤其是电火花加工等方面进行了较为详尽的阐述,希望能从国外此方面的研究中,看出21世纪特种加工技术的走向,并为我国特种加工技术的研究提供借鉴。 相似文献
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Enhanced virtual machining for sculptured surfaces by integrating machine tool error models into NC machining simulation 总被引:1,自引:1,他引:1
Sculptured surface machining is a time-consuming and costly process. It requires simultaneously controlled motion of the machine axes. However, positioning inaccuracies or errors exist in machine tools. The combination of error motions of the machine axes will result in a complicated pattern of part geometry errors. In order to quantitatively predict these part geometry errors, a new application framework ‘enhanced virtual machining’ is developed. It integrates machine tool error models into NC machining simulation. The ideal cutter path in the NC program for surface machining is discretized into sub-paths. For each interpolated cutter location, the machine geometric errors are predicted from the machine tool error model. Both the solid modeling approach and the surface modeling approach are used to translate machine geometric errors into part geometry errors for sculptured surface machining. The solid modeling approach obtains the final part geometry by subtracting the tool swept volume from the stock geometric model. The surface modeling approach approximates the actual cutter contact points by calculating the cutting tool motion and geometry. The simulation results show that the machine tool error model can be effectively integrated into sculptured surface machining to predict part geometry errors before the real cutting begins. 相似文献
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通过对电极的优化设计制造、工件定位的精度保证、工件的定位加工3个方面提高电火花加工的精度。详细讨论了如何降低和消除电极加工精度误差、电火花加工机的几何精度误差、工件电极的校正精度误差、定位精度误差等对电火花加工精度的影响,从而提高电火花加工精度。 相似文献
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基于VERICUT环境下的加工仿真的研究 总被引:3,自引:0,他引:3
VERICUT通过对NC代码的校验,能够防止机床碰撞,提高生产效率和精加工质量、优化NC代码:可以模拟加工过程并进行检测。随着CAM技术和CNC的广泛应用,VERICUT将在虚拟加工仿真领域发挥着重要作用。 相似文献
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D. Renton M. A. Elbestawi 《International Journal of Machine Tools and Manufacture》2000,40(4):539-559
Advances in high-speed machining technology, including those in spindle speeds and cutters, are out-pacing advances in the servo control performance of machine tools. To close this gap, new machine tools and improved controls must be developed. Improvements to machine tools under development include special-purpose machine tools, the use of advanced materials, the replacement of ball screws and ways with linear motors and roller guides, and the use of parallel link actuators. This paper focuses on the control issues that will become increasingly important as these high-speed machining and high-speed machine tool advances are realized.The main issues in high-speed servo control are feed rate planning, and servo loop control laws. A method is developed in this paper which takes advantage of the full performance envelope of each axis in an arbitrary path. This near-complete usage of the servo capabilities of a machine tool results in reduced cycle time or reduced path error. A servo loop control law is then developed that uses the axis performance envelope as well as instantaneous position, velocity, and acceleration information of the target path and machine axis to improve servo performance in the presence of disturbances. 相似文献