Investigation of the influence of material anisotropy on teeth excitation

材料各向异性对牙齿激励影响的研究

• 批准号: 273223221
• 负责人: Professor Dr.-Ing. Welf-Guntram Drossel
• 金额: --
• 依托单位: Fraunhofer-Institut für Werkzeugmaschinen und Umformtechnik (IWU)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2015
• 资助国家: 德国
• 起止时间: 2014-12-31 至 2017-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/273223221?language=en
• 关键词: Investigation; influence; material; anisotropy; teeth

The acoustic optimization has a large priority for gear manufacturers. Because of environmental constraints and comfort requirements it is necessary to observe limiting values. Especially for gear units with lightweight construction a differentiated optimization is required. To realize that an important approach is the reduction of the gear mesh excitation using new manufacturing technologies, which lead to better load capacities and ideal properties of materials and components. For this purpose the effects caused by the manufacturing of the toothings will be investigated in detail in this project, whereas the focus will be on analysing generative laser beam melting and rolling of toothings. The rolling of toothings with involute profile has reached a level of development, which allows the use of these toothings in power transmissions. In terms of the influence of the manufacturing bibliographical references and own investigations show, that rolled toothings have higher bending and fatigue strengths compared to cutted toothings. In contrast to that there is almost no published knowledge about the acoustic behaviour of toothings produced by rolling. Just one publication by the Technical University of Munich, published in the 1960s, describes that the gear mesh excitation depends in addition to other cause variables significantly on the fibre structure of the gear wheel and the surface quality of the tooth flanks. Furthermore in relevant technical literatures there are general propositions about the topic of a better smoothness, which are not proved reliably. For this reason they provide an opportunity of profound research issues. The involved research unit 2 has already experiences in terms of the generative manufacturing of toothings emerged from a current DFG project, which deals with the production of gear wheels using 16MnCr5 powder to integrate cooling channels into the wheel's structure. Additionally this manufacturing method offers a great potential for special geometries of the gear wheel, which are relevant for acoustic and lightweight reasons. The focus of this project is the scientific verification of a better acoustic behaviour caused by property modifications of rolled or generative produced toothings compared to gear wheels manufactured by cutting based on the same geometry. As part of the project the evidence of the property modification should be provided by intensive fundamental research. The cause-effect relationships have to be recognized in a macroscopic and microscopic level of the material properties and should be integrated in an calculation model. This model is supposed to predict the gear mesh excitation in consideration of the different material properties.

对于齿轮制造商来说，声学优化具有很大的优先级。由于环境约束和舒适性要求，有必要观察限制值。特别是对于轻量化结构的齿轮装置，需要进行差异化的优化。实现这一目标的一个重要途径是利用新的制造技术减少齿轮啮合激振，从而使材料和部件具有更好的负载能力和理想的性能。为此，本项目将详细研究刀具制造所造成的影响，而重点将放在分析刀具的生成激光束熔化和轧制上。渐开线齿的轧制已经达到了一定的发展水平，这使得这些齿可以在动力传动中使用。参考文献和自己的调查表明，轧制齿比切削齿具有更高的弯曲强度和疲劳强度。与此相反，几乎没有关于滚动产生的牙齿的声学行为的公开知识。仅慕尼黑工业大学在20世纪60年代发表的一份出版物就描述了齿轮啮合激励除其他原因变量外，还显著取决于齿轮的纤维结构和齿侧的表面质量。此外，在相关的技术文献中，关于更好的平滑性这一主题的一般命题并没有得到可靠的证明。因此，它们为深入研究问题提供了机会。所涉及的2号研究单位已经有了从当前DFG项目中产生的齿轮生成制造方面的经验，该项目涉及使用16MnCr5粉末将冷却通道集成到车轮结构中的齿轮生产。此外，这种制造方法为齿轮的特殊几何形状提供了巨大的潜力，这与声学和轻质原因有关。该项目的重点是科学验证，与基于相同几何形状的切削制造的齿轮相比，轧制或生成生产的齿轮的性能改变会带来更好的声学性能。作为项目的一部分，应该通过深入的基础研究来提供财产变更的证据。必须在材料性能的宏观和微观层面认识到因果关系，并将其整合到计算模型中。该模型考虑了不同材料的特性，可以预测齿轮啮合的激励。

项目成果

Theoretical and experimental investigations on the influence of the microscopic anisotropic material properties of gear teeth on their macroscopic behavior

轮齿微观各向异性材料特性对其宏观行为影响的理论和实验研究

• DOI: 10.1007/s10010-017-0223-3
• 发表时间: 2017
• 期刊: Forschung im Ingenieurwesen
• 作者: Schlecht;Berthold;Ulrich;Carsten;Bräunig
• 通讯作者: Bräunig

Advanced Material Studies for Additive Manufacturing in terms of Future Gear Application

增材制造在未来齿轮应用方面的先进材料研究

• 发表时间: 2014
• 期刊: Advances in Mechanical Engineering
• 影响因子: 2.1
• 作者: Bräunig;Töppel;Thomas;Müller;Bernhard;Burkhardt;Martin;Thomas;Drossel;Welf-Guntram
• 通讯作者: Welf-Guntram