Каталог Stellram токарный инструмент - страница 203

Заказ инструмента: http://steelcam.org Turning Technical 8 (343) 382-52-03 | sales@sverla-ekb.ru Wear Trends / Tool Life Types of Wear Trend of Crater and Flank Wear Based on Cutting Time Turning Inserts Curve Curveof of Curve Curveofof Crater wear VB Flank FlankWear Wear Flank CraterWear Wear KT KT VB WearWear KT of Crater P of Crater Depth Depth T Cutting CuttingTime TimeT (min.) T (min.) Flank wear P= Point where sudden wear starts Crater wear is more progressive and VB= Width of flank wear and the limit of normal and safe use does not have a sudden breakdown KT= Depth of crater wear Factors that could Influence the Tool Life Tool Life Criteria We change the insert when Tool life depends on many factors, including the type of clamp, type of coolant, • It does not create the requested (percentage of mix) and type of machine tool. Following, you will see how the finish or tolerances. surface speed and other data can influence tool life. • When the wear under the cutting Chart “A” below, shows how a different surface speed (Vc) can influence the tool edge line is too high, causing life of the insert. The higher the Vc, the lower the acceptable time life is where premature failure V1>V2>V3>V4 you can see respectively that T4>T3>T2>T1. • When the crater depth on the insert face is excessive, causing premature Chart “B” shows how the wear is influenced by the higher machining data. failure • When the power consumption increases suddenly during the cut Chart A Chart A V1 (sfm) Speeds(sfm) V2 V3 CuttingSpeeds V4 Chart B Chart B Cutting Vc f Ap Wear Wear T1 T2 T3 T4 Lifetime Lifetime(min.) (min.) HigherVVccFeed Higher Feedand andAApp C202 www.kennametal.com