Каталог Stellram токарный инструмент - страница 193

Заказ инструмента: http://steelcam.org Turning Technical 8 (343) 382-52-03 | sales@sverla-ekb.ru Failure Analysis Turning Inserts Cause Correction Failure Intermittent heating A U se a heat resistant grade increased of the cutting TaC. edge. High Vc and B U se positive rake tools. high volume metal C Increase nose radius. removal. D R educe in the following order: surface speed, feed or depth of cut. E A void use of coolant. Thermal Cracking Cutting tool A U se a tougher grade. N° Failure type excessively brittle. B U se negative rake angle inserts. 1 Flank wear C Increase nose radius. Physical Tool too hard D U se increased edge land. 2 Chipping for application conditions. E Increase cutting speed. 3 Partial fracture Chipping 4 Crater wear Chemical 5 Deformation Grade not hard A U se a harder, more wear resistant enough for grade. 6 Thermal Crack application. B D ecrease surface speed. 7 Built up edge High surface speed. C Increase feed. D U se coolant. Excessive Flank Wear Notching occurs at A Increase approach angle to depth of cut line. maximum. Usually due to work B Increase nose radius for shallow 5 hardened surface, cuts. 2 scale or abrasion. C R educe Vc surface speed and feed. D V ary the depth of cut. Notching 6 Surface speed too A Increase surface speed. low for material  se inserts that reduce friction. i.e. B U 3 being machined. TiALN PVD Coated 7  se high lubricity coolant. C U 1 4 Built-Up-Edge Heavy feed or high  educe surface speed. A R surface speed.  educe feed. B R  se a harder grade. C U  se a more heat resistant grade. D U Deformation Excessive heat and A U se a harder grade. pressure causing B R educe surface speed. chip to weld to rake C R educe feed. angle. D Increase the rake angle. Crater Wear C192 www.kennametal.com