Prediction System of Magnetic Abrasive Finishing (MAF) on the Internal Surface of a Cylindrical Tube

Abstract

This study mainly used magnetic abrasive finishing (MAF) to explore a stainless steel SUS304 cylindrical tube related to the processing characteristic and the prediction system. The self-made adjustable electricity polishing mechanism was assembled on a magnetic abrasive machine. The cylindrical stainless steel tube was filled with magnetic abrasive, which consisted of sintered iron and aluminum oxide powder. Magnetic abrasive in the electromagnetic field was adsorbed on the cylindrical tube to become a flexible magnetic brush. It could generate adjustable pressure on the workpiece surface when the magnetic brush was grinding, and it could make the workpiece face polished to the mirror surface degree.

This experiment used nonmagnetic stainless steel SUS304, following experimental design to conduct the experiments and to explore the effects of various parameters such as rotational speed, vibration frequency, current strength, abrasive, etc., on the surface finish characteristics. After statistical analysis, analysis of variance (ANOVA) was obtained, and then surface finish prediction system was constructed based on the significant parameters. System precision was about 97%. The system will be explored further to develop an adaptive control model for MAF in a real fashion.

Keywords:

• Abrasive
• Brush
• Design
• Experiment
• Finish
• Magnetic
• Polishing
• Prediction

ACKNOWLEDGMENT

The authors thank the National Science Council of the Republic of China of financially supporting this research under contract No. NSC 92-2212-E-252-002.

Notes

This experiment liquid using HD-233A, which is polishing liquid mixed with 98-97% water weigh ratio.

R _max is the value from experiments.

R _max < lowbar1 > P is predicted value from fuzzy-net system.