权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Improvement of part live span by influencing the surface integrity machined with the hybrid process combination turn-rolling.

通过影响混合工艺组合车削加工的表面完整性来提高零件寿命。

基本信息

批准号：
366947252
负责人：
Professor Dr.-Ing. Berend Denkena
金额：
--
依托单位：
Institut für Fertigungstechnik und Werkzeugmaschinen (IFW)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2017
资助国家：
德国
起止时间：
2016-12-31 至 2020-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/366947252?language=en
关键词：
Improvement part live span influencing

项目摘要

The current state of the research shows that the mechanical surface strengthening process deep rolling is a suitable method for changing the properties of surface integrity to increasing the strength and lifespan of highly stressed components. A further increase in the lifespan can be reached by the combination of process temperature and deep rolling. However, this requires an additional process step and is therefore not widely used. This disadvantage can be eliminated by parallelization with cutting processes. Thus, the turn-rolling process is an efficient possibility for processing high-performance components. The overall objective of the planned project is the basic investigation and modeling of the mechanisms of action in combined thermomechanical processing for the purpose of targeted lifespan improvement through tailor-made properties of surface integrity. For this purpose, the targeted adjustment of the properties of surface integrity by thermal deep rolling is made possible. Subsequently, the mechanisms of action between the machining process and the temperature of the component are modeled so that the necessary thermal energy can be induced into the component through the machining process and allows thermal deep rolling. Based on this, bases for the adjustment of properties of surface integrity by the combined turn-rolling process are formed. Finally, the prolonged lifespan of components is demonstrated as a result of the turn-rolling process and a function of the temperature. These investigations are based on the hypothesis that not only higher residual stress values can be achieved at higher temperatures, but that these are also more stable than at lower temperatures.

研究现状表明，机械表面强化工艺--深轧是一种改变表面完整性以提高高应力构件强度和寿命的合适方法。通过工艺温度和深度轧制的结合，可以进一步提高使用寿命。然而，这需要额外的工艺步骤，因此没有被广泛使用。这个缺点可以通过与切割过程并行化来消除。因此，车轧工艺是加工高性能部件的有效可能性。该计划项目的总体目标是对联合热机械加工中的作用机制进行基本研究和建模，以便通过定制的表面完整性特性来实现有针对性的寿命延长。为此，可以通过热深轧有针对性地调整表面完整性。随后，对加工过程和部件温度之间的作用机制进行建模，使得可以通过加工过程将必要的热能引入部件中，并允许热深轧。在此基础上，为车轧复合工艺调整表面完整性提供了依据。最后，通过车轧工艺和温度的函数证明了部件的使用寿命延长。这些研究是基于这样的假设，即不仅在较高的温度下可以实现较高的残余应力值，而且这些值也比在较低的温度下更稳定。