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作者采用加速试验法,对耐磨铸铁精密蜗轮副的磨损规律及精度保持性进行了试试研究及理论分析。比较了四种不同材料的精密蜗轮副的耐磨性能,并初步预测了耐磨铸铁精密蜗轮副的使用寿命。试验结果以VTi20的耐磨性及精度保持性最好,使用寿命在十年以上。因此,推荐选用VTi20或HT32～52两种材料制造精密蜗轮。此外,作者根据实验结果及理论分析,提出了精密蜗轮副最佳接触区的概念。指出精密蜗轮副存在一个最佳的接触区,当初始接触斑置于该区域时,不但能减少常值装配误差的不良影响,同时还可以改善蜗轮副的磨损性能,延长其使用寿命。本文所得结论对工厂今后选用精密蜗轮副方面的设计和制造有很好的参考价值。
The author uses accelerated test method, tried wear-resistant cast iron precision worm gear wear and accuracy of the trial and theoretical analysis. The wear resistance of precision worm gear with four different materials is compared, and the service life of wear-resistant cast iron precision worm gear is forecasted. The test results to VTi20 wear resistance and accuracy of the best retention, the service life of more than 10 years. Therefore, it is recommended to use VTi20 or HT32 ~ 52 two kinds of materials to manufacture precision worm gear. In addition, based on the experimental results and theoretical analysis, the author put forward the concept of the best contact area of the precision worm gear pair. It is pointed out that there is an optimal contact area for the precision worm gear. When the initial contact spot is placed in this area, not only can the adverse effects of the constant assembly error be reduced, but also the wear performance of the worm gear pair can be improved and the service life of the worm gear pair extended. The conclusions obtained in this paper have very good reference value for the design and manufacture of precision worm gear pair in the future.