高速铣削拐角刀具轨迹优化

拐角高速铣削时,切削方向突变和径向切深骤增会导致切削力和振动突然增加。为了避免这种情况,本文以限制径向切深为目标,对拐角刀具轨迹进行优化。首先,通过重新设计圆弧插补始末点位置,对传统圆弧插补模型进行优化。第二,将循环余摆线模型引入到拐角残余清除当中,对循环余摆线模型中刀具半径、摆线半径和刀具步长之间的数学关系进行分析,推导了限制径向切深的数学方法。最后,将优化的刀具路径策略与Cimatron策略进行对比加工试验,结果表明:优化的刀具路径加工效率略低于Cimatron策略,但优化策略在加工稳定性和加工质量上都明显优于Cimatron策略。

圆外(内)旋轮线演示仪的制作及研究

制做了圆外(内)旋轮线演示仪,并对其产生的图案进行了分析.圆外(内)旋轮线演示仪能在较大规模的场合清晰、醒目地演示圆外(内)旋轮线,并能容易地在各个图案间切换.

中国齿轮发展史、现状及趋势

本文介绍了中国齿轮发展史和现状,以及未来的发展趋势。古代,中国最早发明和应用齿轮是在2200年以前。近代,摆线、渐开线和圆弧齿轮逐步在中国获得应用。最后,指出了中国齿轮设计和制造的发展趋势。

Profile Modification for Increasing the Tooth Strength in Spur Gear Using CAD

This paper examines the tooth failure in spur gears. Corrective measures are taken to avoid tooth damage by introducing profile modification in root fillet. In general, spur gear with less than 17 numbers of teeth had the problem of undercutting during gear manufacturing process which minimizes the strength of gear at root. In this study, a novel design method, namely circular root fillet instead of the standard trochoidal root fillet is introduced in spur gear and analyzed using ANSYS version 11.0 software. The strength of these modified teeth is studied in comparison with the standard design. The analysis demonstrates that the novel design exhibit higher bending strength over the standard trochoidal root fillet gear. The result reveals that the circular root fillet design is particularly suitable for lesser number of teeth in pinion and where as the trochoidal root fillet gear is more opt for higher number of teeth.