螺旋锥齿轮磨齿温度场研究与应用分析

Research and Application Analysis of Grinding Tooth Temperature Field of Spiral Bevel Gear

根据螺旋锥齿轮的数控磨削原理,采用热传导和矩形移动热源理论及有限元分析方法,建立了磨齿温度场有限元分析3D模型和磨齿瞬态温度场。对热和结构两个物理场进行耦合,仿真分析了磨齿瞬态热应力和热变形。实例和试验分析表明:磨齿瞬态最高温度远高于磨齿稳态温度,且位于磨削弧中心;其他各点的瞬态温度,随位置、时间以及其他影响因素的不同,呈现不同的变化规律。磨齿瞬态热应力、热变形与磨齿瞬态温度密切相关,同时还受结构、材料特性和磨削条件等因素的影响,磨齿瞬态最大热应力与热变形位于磨齿瞬态最高温度附近。在其他条件相同时,采用油基磨削液的瞬态最高温度、热应力与热变形均比采用水基磨削液时要大。

Based on NC grinding principle of spiral bevel gear, using theories of heat conduction, moving rectangle heat source and the finite element method, the finite element 3D model, transient temperature field of grinding tooth of spiral bevel gear were built. Then, by coupling of two physical field of thermal and structure,their transient thermal stress and deformation were simulated and analyzed. The example and test analysis show many conclusions of grinding tooth of spiral bevel gear. Firstly, the highest transient temperature of grinding tooth is much greater than its static temperature, and its place of highest transient temperature is located the center of grinding arc. As changing of the position, time and other factors, the transient temperature of other points has its different changing rule. Secondly, the transient thermal stress and deformation of grinding tooth are closely related to its transient temperature,and are still influenced by many other factors, such as the structure, material property and grinding condition of spiral bevel gears. The place of greatest transient thermal stress and deformation is located near the area of the highest transient temperature. Finally,under the same conditions, the transient temperature, transient thermal stress and deformation of grinding tooth using oil --based coolant are all greater than that using water--based coolant.