Краткий справочник по резанию материалов на металлообрабатывающих станках TECHNICAL DATA

Краткий справочник по резанию материалов на металлообрабатывающих станках TECHNICAL DATA

Краткий справочник по резанию материалов на металлообрабатывающих станках TECHNICAL DATA _ FEED When cutting with a general type holder, feed is the distance a holder moves per workpiece revolution. When milling, feed is the distance a machine table moves per cutter revolution divided by the number of inserts. Thus, it is indicated as feed per tooth. Feed rate relates to finished surface roughness. Effects of Feed 1. Decreasing feed rate results in flank wear and shortens tool life. 2. Increasing feed rate increases cutting temperature and flank wear. However, effects on the tool life is minimal compared to cutting speed. 3. Increasing feed rate improves machining efficiency. DEPTH OF CUT Depth of cut is determined according to the required stock removal, shape of workpiece, power and rigidity of the machine and tool rigidity. Effects of Depth of Cut 1. Changing depth of cut doesn't effect tool life greatly. 2. Small depths of cut result in friction when cutting the hardened layer of a workpiece. Thus tool life is shortened. 3. When cutting uncut surfaces or cast iron surfaces, the depth of cut needs to be increased as much as the machine power allows in order to avoid cutting impure hard layers with the tip of cutting edge to prevent chipping and abnormal wear. 0-4 u 0.03 0.05 0.1 0.2 0.5 1.0 2.0 3.0 Глубина резания (мм) Depth of Cut (mm) Cutting Conditions Workpiece JIS SNCM431 Grade STHOT Insert: 0-0-5-5-35-35-0.3mm Feed f=0.20mm/rev Cutting Speed vc=200m/min Cutting TimeTc=10min Depth of Cut and Flank Wear Relationship in Steel Turning Подача (мм/оборот) Feed (mm/rev) Cutting Conditions Workpiece JIS SNCM431 Grade STi10T Insert: 0-0-5-5-35 35 0.3inni Depth of Cut ap=1.0mm Cutting Speed vc=200m/min Cutting Time Tc=10min Feed and Flank Wear Relationship in Steel Turning Mitsubishi Materials 1975 TECHNICAL DATA