DETERMINATION OF REGULARITIES OF TREATMENT OF DISKS IN A FLUIDIZED BED OF ABRASIVE

Abstract

n this work, the main regularities of processing disks in a fluidized bed of abrasive are established.The research was carried out on the АПС-600A installation when processing disks in a fluidized bed of abrasive. When processing discs, abrasive grains of groups 24A, 63C, and a mixture of abrasive grains 24A63+24A20 (50 % + 50 %) were used.The grain size of the abrasive grains varied in the range № 20 … № 80.The processed disks were made of such alloys as VT3-1, VT-9, EI698-VD, steel 45 HRC 38...45, and aluminum alloy D1T. The peripheral speed of the parts is Vp = 5...40 m/s. The maximum air consumption is 2000 Nm 3/h. The pressure of the air that liquefies the abrasive in the air-falling chamber is 5...6 kPa. The disk was immersed in a liquefied layer of abrasive to a depth of 0.2...1.2 of the radius of the disk. The regularities of the dependence of the removal of various materials from the machined surface of the disks on the speed of the part, the grain size, and the brand of the abrasive grain have been established. The dependence of abrasive grain wear on the speed of the part and on its position along the height of the abrasive layer was experimentally established, which allowed forassigning rational modes of processing discs in a fluidized layer of abrasive. The main regularities of the processing of disks in a fluidized bed of abrasive have been established, and the influence of the main parameters of the processing process on the productivity and stability of the abrasive grain has been determined. The main regularities of the process of processing discs in a fluidized bed of abrasive have been established experimentally, which allowsfor determining the main parameters, technological conditions, and modes of the finishing operation of parts manufacturing.