Bearing sleeve machining cutting parameter choice

( 1) Turning amount of choosing rough machining, in the process system rigidity and permission of machine tool power, as far as possible, take a larger quantity of turning, to reduce the number of feed; Finishing, in order to ensure the parts machining accuracy and surface roughness requirements. According to the processed surface quality, cutting tool material, workpiece material and machine performance, refer to the manual cutting dosage or relevant materials selection: coarse contour alpha p = 2 mm, outside half fine outside profile of alpha p = 0. 75 mm, fine car alpha p = 0. 4毫米; Rough boring alpha p = 1 mm, fine boring alpha p = 0. 3mm。 ( 2) Feeding of choosing rough machining, according to the processing of materials, the size of the tool rod, workpiece diameter and amount of turning operations have been identified, reference manual or relevant materials and combining the cutting parameter machine specification, selection: coarse car f = 0. 2 mm/r, rough boring f = 0. 15毫米/ r; Semi-finishing and finish machining, in accordance with the requirements for the surface roughness, according to the workpiece material, tip arc radius and cutting speed, select: half a fine car f = 0. 15 mm/r, f = 0. 1 mm/r, fine boring f = 0. 1mm/r。 ( 3) The choice of the spindle speed based on turning operations have been identified, feeding, cutting tool and workpiece material durability, reference manual or relevant materials, and cutting parameter table lookup to select cutting speed Vc, Vc = 120 m/min, coarse car half a fine car Vc = 130 m/min, fine car Vc = 140 m/min, rough boring Vc = 60 m/min, fine boring Vc = 70 m/min, and then use formula ( 2-5) To calculate the spindle speed. Vc =πdn/1000 （ 2-5) Type: n to the rotating speed of workpiece and tool ( r/min) Cutting speed (Vc for m/min) D point selected for the cutting edge of the workpiece and tool of gyration diameter ( mm) Combined with practical experience, and ultimately determine the spindle speed is: rough machining, n = 600 r/min, n = 800 r/min, semi finished car car n = 1000 r/min, fine boring n = 700 r/min, threading, n = 500 r/min.