Performance Indicator System Analysis And Research Of Magnetic Abrasive

In modern manufacturing, magnetic abrasive finishing is a precisionmachining processes to greatly improve the synthesized mechanical properties,surface quality, service life and appearance characteristics of the parts.Especially in the manufacture of abrasive, the magnetic abrasive finishing ismore significant to enhance the quality of the abrasive, its surface roughness isimproved obviously and service life is also improved by approximately doubled.As the abrasive tool of this technology, magnetic abrasive has become thebottleneck that restricts the wide application of magnetic abrasive finishing.Therefore, the study of magnetic abrasive has great significance. Based on themechanism of magnetic abrasive finishing, this paper researched and analyzedthe performance evaluation index and experimental testing methods of magneticabrasive. It is beneficial to analysis the performance parameters of magneticabrasive and the relationship between them, providing theoretical and datasupport for better to understand how to select and prepare magnetic abrasive.For analyzing the performance of magnetic abrasive more comprehensively,by consulting a large number of relevant literatures, main factors affecting the performance of the grains include abrasive mixing uniformity, shape, size,density, porosity, service life, magnetic properties, mechanical properties andother factors. On the basis of previous studies and combining with the existingexperimental conditions, the performance of magnetic abrasive has beenanalyzed and tested, including the mix uniformity, shape, size, density, porosity,service life.The main contents of this paper are as follow:1. To understand the machining mechanism of magnetic abrasive finishingtechnology, the components and structure of magnetic abrasive were analyzed,as well as the performance requirements of each component. From the factorsaffecting the finishing results of magnetic abrasive, the main performanceparameters of magnetic abrasive were analyzed and studied.2. The meaning of magnetic abrasive mixing uniformity was studied, CVwas used for the evaluation index of abrasive mixing uniformity and tested bymagnet Adsorption method.The experimental methods and principles werestudied, and an experimental device was built. We tested the iron powder inexperimental apparatus was fully isolated by weighing method and size method.Finally, the effects of mixing time on the abrasive mixing uniformity werestudied and analyzed; the reasonable mixing time was summarized.3. The effects of particle shape on the magnetic abrasive finishingproperties were analyzed. The particle shapes under different forms offragmentation were exampled and used three-dimensional electronic controlover depth of field microscopy to observe magnetic abrasive particle shape. 4. The influences of particle size on the machining performance ofmagnetic abrasive were explored. The particle size and particle size distributionof magnetic abrasive were tested by using screening method and laser particlesize distribution method, we analyzed and compared the test results, theappropriate sizes were determined.5. The influence of porosity on the machining performance of magneticabrasive were analyzed. Using geometrical method, we drawn a relationshipcurve about abrasive phase, particle size and porosity and explained it.6. Taking the example of cementing magnetic abrasive particles, the servicelife of magnetic abrasive machining aluminum was researched and analyzed. Weused the BT-9300ST laser particle size distribution to measure the particle sizedistribution that before and after magnetic abrasive were used. By the particlesize distribution curve, we analyzed the particle fragmentation that before andafter magnetic abrasive were used.7. The main performance characteristics of magnetic abrasive wereanalyzed systematically; the assessment indicators and test methods ofperformance characteristics were studied. The complex relationship betweeneach other of magnetic abrasive comprehensive performance system weresummarized and explained.