Experimental study on sheet grinding based on magnetic abrasive tool driven by variable electromagnetic fields.

In order to improve the quality and efficiency of the sheet grinding and reduce the problems of distortion, local overwear, and ununiformity induced by grinding, an experimental study on the grinding of the sheet was carried out based on electromagnetic drive—the magnetic abrasive tool (MAT). Based on nonlinear fitting between the surface roughness Ra values and the variables, the microcomputer controls the current to form a transmission magnetic field-driven—the MAT—on the surface of the sheet to analyze the force and explore the force of the MAT and the characteristics of the movement, and find the core structure of the electromagnet and the coil layout of the better parameters. The MAT grinding method based on the electromagnetic drive was carried out for machining the SUS304 sheet workpiece, and the effect of current, machining gap, and magnetic field conversion frequency was analyzed. Based on the experimental study, the mathematical model was built, and the optimized combination of process parameters was validated and verified. The response surface methodology (RSM) was used for experiment design; the optimized combination of process parameters was derived as follows: current 0.72A, machining gap 0.93 mm, and magnetic field conversion frequency 149 ms. The MAT grinding with the electromagnetic drive the surface of the sheet, there is no local overwear phenomenon, the grinding surface is smooth and even, the micro-morphology and uniformity are well, and the mill efficiency is improved, which is a more significant advantage compared with the traditional grinding method. [ABSTRACT FROM AUTHOR]