小模数蜗杆副综合误差测量软件的研制

基于单面啮合原理的小模数蜗杆副综合误差测量仪,可以测量蜗杆副切向综合误差、齿距偏差和侧隙.详细介绍了该仪器的测量流程、软件界面、软件结构、误差提取算法和精度等级评定.该软件具有参数管理、自动测量、误差计算、用户管理、SPC分析、频谱分析、等级评定、结果保存、打印报表等功能,可以应用于小模数蜗杆副的精密检测.     

普通螺纹数控车加工技巧

介绍了普通螺纹的尺寸分析及经验值的选取和普通螺纹的装刀与对刀方法,着重对螺纹数控编程的2种加工技巧进行了阐述,最后给出了应用编程实例。     

磨削硬齿面大内齿圈的椭球形蜗杆砂轮研究

为解决球形蜗杆砂轮磨削大模数内齿圈时使用上的局限性,基于椭球形蜗杆螺旋面理论,提出了椭球形蜗杆砂轮。通过对椭球面螺旋线形成过程的分析,推导出椭球形砂轮螺旋升角和其他参数的计算式。阐述了椭球形砂轮理论上存在法向周节误差和法向齿形误差,给出了通过调整数控机床运动参数来实现法向等值齿距的有效方法。分析了椭球形砂轮法剖面圆度误差产生的机理,探讨了控制法剖面圆度误差的方法。     

蜗轮丝杠直顶式升降平台

主要论述多台蜗轮丝杠直顶式升降平台的设计思想，介绍其结构特点、传动方式、同步控制、定位控制的方法。     

基于VBA的平面二次包络环面蜗轮副实体造型

介绍了采用VBA开发机械零件三维实体造型的实现机制和关键技术 ,通过平面二次包络环面蜗轮副实体造型程序实例 ,阐述了在VBA应用程序中三维实体造型的设计方法。     

Investigation of cutting characteristics for worm machining on automatic lathe — Comparison of planetary milling and side milling

A worm and worm wheel gearing is widely used in a geared motor unit for the convenience and safety of an automobile. For mass production of a high quality worm, the current rolling process is substituted with the milling process. The milling process offers comparatively accurate machining quality and high production capacity for worm manufacturing. Moreover, since the milling process enables the integration of all operations of worm manufacturing on a CNC lathe, production efficiency can be remarkably improved. However, there are several important factors to be considered for producing high quality worms such as cutting force, tool-workpiece interference, and others. Planetary milling and side milling are generally applied to machine worms. In this study, the cutting characteristics of worm machining on an automatic lathe are investigated for two types of milling processes and those processes are compared with each other. A tool-tip trajectory model based on tool-workpiece interaction is proposed, and then tool-workpiece interference and cutting force are simulated with the model. The simulation results are verified through numerous experiments. The experimental results show the cutting characteristics of each milling process and the efficiency for mass production of a high quality worm. This paper was recommended for publication in revised form by Associate Editor Dae-Eun Kim     

平面二次包络环面蜗杆传动优化设计

针对平面二次包络环面蜗杆传动，运用优化理论和方法，对其进行了优化设计。结果表明，这种方法使蜗杆传动的设计更合理，更高效     

Landscape Utopianism: Information,Ecology and Generative Pastoralism

Architect and educator Gregory Marinic describes how the 21st century is witnessing the rise of a new utopianism through landscape/architectural interventions that pursue the possibilities of ‘ersatz utopias within our quotidian world’. He illustrates this with his own collaborative works and competition entries for d3, an art-architecture stewardship programme based in New York of which he is director.     

基于Pro/E的越野车托森差速器参数化设计

托森差速器利用正逆两对蜗轮蜗杆传动高摩擦、低效率的特性增大了转矩比,并能根据转速差的变化自动调整转矩分配,提高了越野车的地面通过性.在Pro/E环境下完成了蜗轮蜗杆式限滑差速器主要零部件直齿圆柱齿轮、蜗杆蜗轮和弧齿锥齿轮的三维参数化实体建模,实现某越野车托森差速器的参数化设计,减少了设计人员的重复劳动,提高了设计效率.