铁基粉末冶金零件加工用刀具选用研究

Research on tool selection of iron based powder metallurgy parts

铁基粉末冶金零件经过压制烧结成形,其工作表面精度难以满足使用要求,需要经过适当的机械加工以保证其精度与表面粗糙度。然而在切削加工过程中,发现刀具磨损严重、寿命不高,频繁换刀影响生产效率。为了选择出适合生产的刀具,传统的基于经验的试刀法有很大缺陷,耗费成本高,试验结果不稳定,实践中妨碍了企业组织高效低成本的生产制造。为了解决生产中刀具的选型与应用难点,本文依据其切削性能表现并结合车削刀具切削参数,运用deform 3D仿真对铁基粉末冶金零件切削过程中温度、磨损区域详细分析,实验中观察所用刀具的磨损表现,将仿真数据和实验结果对比分析,为选择合适的加工刀具提供实际可操作性依据。

The working surface precision of iron-based powder metallurgy parts after pressing and sintering is difficult to meet the use requirements, so it needs to be machined properly to ensure its accuracy and surface roughness.However, in the process of cutting, it is found that the tool wear is serious and the service life is not high. Frequent tool change affects the production efficiency. In order to select suitable cutting tools for production, the traditional tool testing method based on experience has great defects, high cost and unstable test results, which hinders enterprises from organizing efficient and low-cost production in practice. In order to solve the difficulties of tool selection and application in production, this paper uses deform according to its cutting performance and cutting parameters of turning tools The temperature and wear area of iron-based powder metallurgy parts in the cutting process are analyzed in details by 3 D simulation. The wear performance of the tool used is observed in the experiment. The simulation data and experimental results are compared and analyzed to provide practical basis for selecting suitable machining tools.