磁感应游离磨粒线锯吸附机理及切割性能分析

Research on the Adsorption Mechanism and Cutting Performance of Magnetic Induction Free-abrasive Wire Saws

传统游离磨粒线锯切割过程中,磨粒难以进入到切割区域,这使得切割区域工况变差,线锯切割效率降低,切缝损失增大。提出了一种磁感应游离磨粒线锯切割的新方法,通过磁场力的作用将磁性磨粒吸附于锯丝表面顺磁区,使更多磁性磨粒进入切割区域,从而提高线锯切割性能。通过分析锯丝在不同磁场强度下的吸附磁性磨粒情况,验证了磁感应游离磨粒吸附机理的正确性。最后,进行磁感应游离磨粒线锯切割实验。结果表明,磁场强度的变化对游离磨粒线锯的切割效率、表面粗糙度和切缝宽度都会产生显著的影响。

In the process of traditional free-abrasive wire sawing,abrasive grains are always difficult to enter into the cutting area,which causes the worsening condition in the cutting area,low cutting efficiency and large kerf loss. A method of free-abrasive wire sawing in the magnetic field is proposed in this paper. Magnetic abrasive grains are adsorbed on the surface of magnetized wire by magnetic force,and therefore more magnetic abrasive grains are carried into cutting area during the cutting process. This adsorption mechanism is helpful to improve the cutting performance of wire saws,and it is also verified by the analyzing adsorption behavior of the magnetic abrasive grains. Further,practical experiments and cutting results show that the variations in magnetic field intensity significantly affect the cutting efficiency,surface roughness,and kerf width.