基于双磁盘刀具钝化中磁弹磨粒的磨损及寿命研究

Research on Wear and Life of Magneto-Elastic Abrasive Particles in Double Disk Tool Passivation

为了探究磁弹磨粒在双磁盘刀具钝化中磨损规律以及使用寿命的长短,通过对磁弹磨粒进行受力分析讨论了其磨损失效的形式,得出了影响磁弹磨粒寿命的主要因素。然后,制备出不同质量配比和不同磨粒相类型的磁弹磨粒,采用双磁盘钝化设备进行钝化实验,分析了磁弹磨粒质量配比和磨粒相类型对磁弹磨粒的磨损规律和对刃口表面粗糙度的变化规律,同时还对钝化前后的磁弹磨粒进行X射线能量色散普(EDS)和激光粒度分析。实验结果表明,以氧化铝为磨粒相的磁弹磨粒在钝化过程中主要发生磨粒相磨钝磨损,以金刚石为磨粒相的磁弹磨粒主要发生磨粒相脱落磨损,两种类型的磁弹磨粒都是在质量配比3:1时使用寿命最好。

Magneto-elastic abrasive particle is a new type of wear particle with the characteristics of both bonded and loose wear particles,and the study of its performance is very important.Therefore,in order to explore the wear law and service life of magneto-elastic abrasive particles in double disk tool passivating,the wear failure form of magneto-elastic abrasive particles is discussed through the force analysis,and the main factors affecting the life of magneto-elastic wear particles are obtained.Then,the magneto-elastic ab-rasive particles with different mass ratios and different abrasive phase types were prepared,and the passiva-tion experiment was carried out by using double-disk passivation equipment.The wear law of magneto-elas-tic abrasive particles and the change law of the surface roughness of the cutting edge were analyzed.At the same time,the X-ray energy dispersive spectroscopy(EDS)and laser particle size analysis were performed on the magneto-elastic abrasive particles before and after passivation.The experimental results show that the abrasive phase of the magnetoelastic wear with alumina is mainly dull wear,and the abrasive phase of the diamond is mainly off-wear during passivation.Both types of magnetoelastic wear have the best service life when the mass ratio is 3:1.