Influence of Impact Load on Fatigue Bending Strength of Case-Hardened Gears
Influence of Impact Load on Fatigue Bending Strength of Case-Hardened Gears
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冲击载荷对渗碳齿轮疲劳弯曲强度的影响
DOI：
10.1299/jsme1958.15.877
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发表时间：
1971
期刊：
影响因子：
--
通讯作者：
Ryuji Higashi
中科院分区：
文献类型：
--
作者：
Toshio Aida;Hiroshige Fujio;M. Nishikawa;Ryuji Higashi
研究了齿轮在冲击载荷作用下的表面硬化条件与弯曲疲劳强度之间的关系。结果表明：(1)硬齿面齿轮存在一个最佳的硬化层厚度，但与冲击弯曲强度的最佳硬化层厚度不同。硬化层厚度过大会导致冲击弯曲强度降低。(2)当冲击载荷P小于0.63Pim‘(Pim’为冲击断裂载荷)，冲击速度小于5m/s时，如本试验，冲击载荷对疲劳强度没有影响。(3)当冲击载荷与疲劳极限载荷几乎相等时，多次施加冲击载荷会使弯曲疲劳极限增大。
In this paper, the authors investigated the relationship between case-hardening condition and the bending fatigue strength of gear tooth under impact load. The results obtained from this experiment are summarised as follows: (1) There exists an optimal thickness of case-hardened layer for bending endurance limit of case-hardened gears, but it differs from an optimal thickness of case-hardened layer for impact bending strength. And an excessively large thickness of case-hardened layer causes an decrement of impact bending strength. (2) When impact load P is less than 0.63Pim' (Pim': impact fracture load), and impact velocity is below 5m/sec such as in this experiment, impact load has no influence on fatigue strength. (3) Few times applications of an impact load, which is nearly equal to endurance limit load, cause an increment of bending endurance limit.