共查询到18条相似文献,搜索用时 109 毫秒
1.
2.
采用滚切法加工出的圆弧齿轮虽能保证定传动比传动且啮合点不会在齿高方向移动,但啮合点处的压力角会发生变化.现有文献研究中心距误差对圆弧齿轮啮合传动的影响时都是以圆弧齿廓为基础的,这种研究结果并不适用于滚切加工后的圆弧齿轮.本文利用滚切加工后的凸凹两圆弧齿轮齿面方程,对滚切加工法及中心距误差对圆弧齿轮啮合传动的影响做了较为详尽的分析. 相似文献
3.
4.
任意转角位置的双圆弧齿轮的齿面数学模型 总被引:2,自引:0,他引:2
在基于加工原理及渐开线展开原理的基础上建立的任意转角位置的双圆弧齿轮齿面数学模型,其表述简单,应用时无须作坐标变换,能准确、真实地描述双圆弧齿轮轮齿在任意转角位置时齿面上的任一点。该模型为双圆弧齿轮三维数字化设计、制造,啮合分析、运动学和动力学分析提供了新的理论依据。 相似文献
5.
《组合机床与自动化加工技术》2017,(6)
齿轮动态接触性能将直接影响传动平稳性和承载能力。为了研究圆弧齿轮啮合过程中动态接触特性的时变规律,基于大刀盘铣削加工圆弧齿轮原理,借助MATLAB与UG建立精确的齿轮三维模型;借助ANSYS对圆弧齿轮副进行显式动力学分析,研究了点接触形式的圆弧齿轮的齿面接触应力分布情况;同时通过对齿轮副从静止到启动这一动态过程的模拟,探究了轮齿接触应力和啮合冲击的时变规律;最后,通过对不同齿宽系数的齿轮接触应力时变规律的研究,揭示了齿宽系数对圆弧齿轮的传动平稳性及承载能力的影响规律。实验结果表明,当齿宽系数在0.35~0.6范围内变化时,齿宽系数越大,齿轮的啮合冲击越大,而接触应力越小,为圆弧齿轮的设计及工程应用提供了理论依据。 相似文献
6.
谐波减速器的应用领域对产品性能的要求日益提高,尤其是机器人行业,要求谐波减速器具备高寿命、高精度、高转矩容量等。传统的渐开线齿形由于同时啮合齿对数较少,传动能力有限,难以达到使用要求。而双圆弧谐波齿形能满足上述要求。但目前国产谐波减速器主要还是以渐开线齿形为主,对双圆弧谐波齿形的设计原理基本没有掌握。首先介绍了谐波减速器的研究概况,然后讲述了双圆弧谐波减速器齿轮传动的基本原理和双圆弧齿形计算机辅助设计软件的开发,提出了几种齿形设计中如何提高啮合精度的方法和基于复杂柔轮有限元变形分析的中性曲线的三次样条模型。通过理论计算模型开发出了双圆弧谐波齿轮计算机辅助设计软件,极大地提升了设计开发效率,降低了开发成本。通过有限元分析模拟了柔轮的真实变形,有限元模拟出的柔轮变形齿廓能与刚轮齿廓精确啮合,与理论计算出的刚柔轮齿廓能精确啮合达成一致,证明理论模型计算出的双圆弧齿廓是准确无误的。 相似文献
7.
为了分析压力机齿轮加工中齿根圆弧过渡曲线形状对齿轮啮合的影响,通过图解法得出齿轮齿形,模拟该齿形传动时的啮合状态并检查干涉。提出齿轮传动设计时的注意事项和解决方法。 相似文献
8.
目前抽油机减速器双圆弧齿轮使用一段时间后会出现单个齿破损或多个齿间隔破损的情况,现有的修复方法效率低。针对这种情况,提出设计一种对修复后的再制造双圆弧齿轮进行再加工的切削机床,验证再制造双圆弧齿轮单齿加工的可行性。结合再制造双圆弧齿轮单齿展成加工理论,对单齿加工机床的刀具运动部件、齿向螺旋进给部件、齿形展成进给部件以及工件运动部件进行设计,最终得到满足加工要求的再制造双圆弧齿轮单齿切削机床。分析再制造双圆弧齿轮单齿加工的误差后,提出一种减小再制造双圆弧齿轮轴向齿距误差的方法。 相似文献
9.
晋燎原 《金刚石与磨料磨具工程》1994,(2)
近年来,我国齿轮研究者提出了一种变长线齿轮传动理论,采用这种理论设计的齿轮具有相似于圆弧齿轮的齿形,即具有凸、凹圆弧齿廓,但这种齿轮不是诺维柯夫圆弧齿轮,其啮合原理、设计计算、加工原理及测量方法等,都与圆弧齿轮不同。变长线齿轮与圆弧齿轮相比最明显的优点就在于:这种齿轮 相似文献
10.
11.
《CIRP Annals》2022,71(1):89-92
Gear hobbing is widely employed to manufacture automotive gears, where the productivity depends on the cutting speed. Currently, gear hobbing is performed at ~300 m/min using high-speed steel hob cutters. In this study, ultra-high-speed gear hobbing was attempted using a large-diameter cemented carbide hob cutter on a gear grinder. This enabled a cutting speed up to 2450 m/min. Many interesting phenomena were acquired in this speed range. Chips were severely oxidized, whereas the gear surface was not affected. Compressive residual stress was generated at the gear surfaces with low surface roughness and high hardness, while the wear of hob cutter was insignificant. 相似文献
12.
13.
在深入研究滚齿机挂轮计算数学模型和算法分析的基础上 ,用VB6 0开发了一种无差动方法加工斜齿圆柱齿轮及其挂轮选择的新方法。用本方法可以快速地选择高精度挂轮 ,达到较高的加工精度 ,在生产中有实际意义。 相似文献
14.
A method is developed for the design and manufacturing of the hob for processing a worm gear with circular axial profile. The calculation includes the determination of the generator surface and the cutting edge profile of the hob, the profile of the conical, dished, and pencil-type grinding wheel for relief grinding the hob teeth, the optimal values of setting angles of the grinding wheel axis to improve the precision of the resharpened hob, and the determination of deviations of the cutting edge of the resharpened hob from the required profile. The corresponding computer program is developed. By using this program the influence of the lead angle of the hob and the diameter of the dished grinding wheel for hob tooth relief grinding on the optimal values of setting angles is investigated. The obtained results show that by using the optimal machine setting, the precision of the resharpened hob is considerably improved. 相似文献
15.
16.
斜齿圆柱齿轮无差动滚切技术研究 总被引:1,自引:1,他引:1
对无差动滚切技术进行了系统的研究,提出了一种用无差动法滚切斜齿圆柱齿轮及其挂轮选择的新方法。用本方法可以快速地选择高精度挂轮,达到较高的加工精度.在生产中有实际意义。 相似文献
17.
18.
Yoshihiro Fujisawa Masaharu Komori 《Journal of Materials Processing Technology》2010,210(9):1159-1170
Gear characteristics are strongly dependent on the quality of the tooth edge of the gears. Therefore, methods for removing defects such as burrs and pits of gears are very important. Burrs and pits are particularly difficult to remove from small gears due to the small dimensions of the tooth grooves. In addition, the equipment for the removal process should be simple and low in cost. In the present study, a method using a gear-shaped tool made from glass-fiber-reinforced plastic (GFRP) is developed for removing burrs and pits from small gears. A manufacturing method for the GFRP gear-shaped tool is proposed and it was confirmed that a conventional hobbing machine and a carbide hob can easily manufacture such a tool without defects. The ability of the proposed tool to remove burrs and pits is evaluated experimentally and the results demonstrate that the burrs and pits of a work gear can be effectively removed by using the proposed tool with simple equipment based on a lathe. This tool was then applied to the mass production of gears, and it was confirmed that this tool has the durability to remove the burrs of 16,797 work gears. 相似文献