Research on the Contribution of Transition Arc Structure of Gear Root Finished Products to Reliability
In order to compare the corresponding relationship between the tooth root structure formed by the rolling arc and grinding arc of the gear root after rolling,heat treatment,grinding,the mutual changes of the heat treatment expansion,the tooth surface distortion,the tooth root sink,the radius of the circular arc of the tooth hobbing,the radius of the grinding circular arc and the height of the grinding step are simulated,and the UG NX12 finite element software is used to simulate the forces during gear meshing motion and calculate the variation law of tooth root stress.The calculation results show that there is no linear relationship between the size of the grinding arc and the stress value,and the rolling tooth root arc,tooth root sinking amount,grinding arc,and grinding step jointly bear the tooth root stress and influence each other.By integrating the comprehensive effects of all the above factors,a virtual root arc can be formed to explain the stress change relationship.Reasonable use of virtual root arc theory can better serve gear manufacturing and improve the reliability of gear service.
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