1279 Каталог KORLOY 2020 Инструмент и оснастка для станков по металлу Стр.L19

Каталог KORLOY 2020 Инструмент для станков по металлу Стр. L19 1279 Lab2u

O Types of tool failure and trouble shooting Turning Troubles Causes Solution Cutting conditions Selecting insert grade Tool shape Machine clamping Cutting speed d J Depth of cut Coolant Select harder grade e rade g r u h g u tou t lect Sel Select better heat-impact resistance grade Select better adhesion resistance grade n o ti at lu i fc I £ ip hi C Rake angle Nose radius Side cutting edge angle Cutting edge strength Honing Improving insert precision M class > G class idi igi ri r er ld 0 h g n vi rov pr Im Clamping workpiece Holder overhang Machine vibration Poor precision Unstable machining size Insert precision is variable Workpiece, Separation of tool t Cutting edge back thrust is big It’s necessary to adjust because machining precision changes during operation. Flank wear increase t Cutting condition is improper t Poor surface roughness for finishing Criterion of tool life. Weakened cutting force by increasing wear of tool Wet cutting t t Cutting edge chipping t t Adhesion, built-up edge t t Wet cutting t Improper cutting conditions t Wet cutting Improper tool and shape of cutting edge t Vibration, chattering Wet cutting t Cutting heat generation Poor machining precision and short tool life by cutting heat Improper cutting conditions Improper tool and shape of cutting edge t Burr, chipping, nap steel, aluminum (burr) Improper cutting conditions t Wet cutting Wear on the tool, improper shape of cutting edge t Cast iron (Weak chipping) Improper cutting conditions Wear on the tool, improper shape of cutting edge t t Soft steel (nap) Improper cutting conditions t Wet cutting Wear on the tool, improper shape of cutting edge t Increase 4-: Decrease : use : Correct use O Tool life criterion KS B0813 0.2 mm Precision light cutting , Finishing in nonferrous alloy Flank wear width 0.4 mm Machining special stee 0.7 mm General cutting in cast iron, steel etc 1 1.25 mm General cutting in cast iron, steel etc Depth of crater wear In general 0.05 0.1 mm ISO (B8688) Tool life criterion Application Complete breakage Machining special steel Flank wear width VB = 0.3 mm Even flank wear of cemented carbides, Ceramic tool VBmax = 0.5 mm Uneven flank wear Crater wear width KT = 0.06+0.3fmm (f:mm/rev) Cemented carbides tool Criterion by surface roughness 1,1.6, 2.5, 4, 6.3, 1ftmRa When surface roughness is important Technical Information 19