磁力磨削管道内壁转子磨具研究

为了有效地去除细长不锈钢管道内表面的氧化皮并减小其表面粗糙度值,设计了一套既具有较大导磁性又具有很强磨削能力的转子磨具。该转子磨具在外部旋转磁场的带动下,在工件内腔旋转并做轴向运动,为由于本身特殊性不易做高速旋转运动的细长类零件提供了一种行之有效的加工方法。本文在转子磨具磁力磨削加工的基础上,利用Ansoft软件建立了该实验装置的2D瞬态场模型,得到了其磁力线分布、磁感应强度分布和模型的电磁转矩曲线。通过对转子磨具电磁转矩的模拟结果与切削力矩的理论计算对比,验证了该转子磨具具有很强的切削性能,可有效的去除工件内壁氧化皮并减小了其表面粗糙度值。

Investigations on Rotor Abrader of Magnetic Abrasive Grinding on Inner Surface of Tubings

A rotor abrader has been designed to remove oxide films and reduce the surface roughness value on the inner surface of stainless steel pipe.The rotor abrader having strong magnetic and grinding performance could be rotated and moved axially on the inner surface of pipelines which are hard to be rotated at high-speed.According to the principle of magnetic abrasive finishing,the two-dimension transient electromagnetic field of experimental device has been established and simulated based on Ansoft software.In this paper,the magnetic field lines distribution,the magnetic flux density distribution and the electromagnetic torque curve of the mould has been obtained.Then by comparing simulation result of electromagnetic torque based on finite element analysis with theoretical calculation of cutting torque,it is proved that the rotor device of removing oxide films reducing the surface roughness value on the inner surface of tubings is feasibility.