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以前的研究已经表明盘形凸轮的制造方法和凸轮从动件性能的动态质量之间在统计学上的重要关系。本文设计和制造的凸轮动态试验装置(CDTF)在调速和负载控制的条件下运行,可以采用各种技术加工而成的凸轮。动态试验的内容有:从动件的切向和法向加速度,从动件的切向和法向力,滚子的滑移也可以精确的测量。在凸轮试件运行之前,凸轮表面粗糙度可以由霍曼尔(Hommel)T—20S表面粗糙度测试计进行测量。跑合期后,在测量力、速度和加速度的情况下又可得到表面参数。加速度和力的数据可转换到频域。所有的试验均是随机的,数据要进行方差分析,以求得加速度有效功率谱和凸轮试件表面粗糙度参数之间的相关性。研究的凸轮试件是由连续数控制造技术采用1/°、1/2°、和1°的数值步长加工而成。试验结果表明:铣削和磨削的凸轮的动态性能具有很大的差异,但没有由于数值步长的不同而引起差异。一种可以替代铣削凸轮整体淬硬的热处理方法(离子氮化)已经显示出在动态性能方面有很大的改进。
Previous studies have shown a statistically significant relationship between the manufacturing method of a cam plate and the dynamic quality of cam follower performance. The cam dynamic test device (CDTF) designed and manufactured in this paper runs under speed control and load control, and can be processed by various technologies. The contents of the dynamic test are: the tangential and normal acceleration of the follower, the tangential and normal force of the follower, and the roller slippage can also be accurately measured. The cam surface roughness can be measured by a Hommel T-20S surface roughness tester prior to cam sample run. After the run-in period, the surface parameters can be obtained again in the measurement of force, velocity and acceleration. Acceleration and force data can be converted to the frequency domain. All tests were randomized and the data were analyzed for variance to determine the correlation between the effective power spectrum of acceleration and the surface roughness of the cam specimen. The cam samples studied were machined with continuous numerical control techniques using numerical steps of 1 / °, 1/2 °, and 1 °. The experimental results show that the dynamic performance of milling and grinding cams is quite different, but it is not caused by the different numerical steps. A heat treatment method (ion nitriding) that can replace the overall hardened milling cam has shown a great improvement in dynamic performance.