Общий каталог Ingersoll 2011 - страница 1354

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GENERAL TECHNICAL INFORMATION TURNING AND GROOVING SELECTING INSERTS INSERT WIDTH TURNING FEED • Insert width strongly affects strength • Feed depends on chipbreaking range of the insert • For most efficient machining select the widest possible insert • Maximum feed depends on insert width and is a function of • Chipbreaking range depends on insert width maximum load • A narrow width improves chipbreaking at lower feed rates • High feed with small corner radii may reduce tool life • Wide inserts and strong blades require high forces and feed rates to • Maximum feed should not exceed the corner radii achieve a frontal clearance angle. • For better chip formation when grooving, feed can be interrupted at small intervals Feed Feed Maximum Feed:fmax= Wx0,075 CORNER RADII - LATERAL TURNING DEPTH OF CUT • Choose large corner radii for long tool life • Minimum depth of cut equals the corner radii • Choose small corner radii to reduce cutting load and lower feed • Maximum depth of cut depends on maximum possible load with narrow inserts • Depth of cut depends on chipbreaking range Large radii - Small side forces Large depth of cut causes large deflection and large frontal clearance.. Small radii - Strong side forces With small depth of cut, deflection and frontal clearance may be too small. Maximum depth of cut : apmax= Wx0,8 1356