The Right Selection for CNC Milling Cutting Tools
The selection for the cutting tools is undertaken in the condition of interaction of human being and computer .We have to select the cutting tools and shank as per the machining capability of lathes ,performance of workpiece ,processing programs ,cutting volume and other related factors .The overall principle for the selection cutting tools is : Facilitation for installation and adjustment ,good rigid performance,high wear-resistance and precision .It is better to select the short shank as much as possible on the condition that catch the machining requirement ,so as to increase the cutting tools rigid performance .In the production ,it is the main consideration of the workpiece’s geometry profile.
1) Selection for milling and cutting tools :when machine camber parts , in order to keep the cutting edge of cutting tools and the processing profile tangency in cutting point ,and avoid interference of cutting edge and workpiece profile ,we generally use ball-nose end mill ,2-flutes end mill for rough machining ,4-flutes end mills for finish and semi-finish maching ;however when mill big plane face,we generally take milling disc with insert-inlayed so as to improve working efficiency and surface roughness ,when mill small plane face or step-face ,we generally take common end mill ,when mill keyway ,we usually use 2-flutes keyway milling cutter so as to keep the size precision of the keyway .
2)Selection for hole-machining tools :It is usually not drilling mould for hole-machining in CNC milling lathes ,the driller diameter must accommodate this basic requirement as L/D≤5(L is the height of the hole ) due to the bad rigid performance and cutting condition ;Center-drill for position before drilling ,so as to reach the position precision in hole-machining ;finish reaming generally take floated reamer ,and the open of the hole must be chamfered ;for boring ,we must try to use the multiple-flute boring head to machine,so as to balance the vibration of boring ;try to use bigger or shorter shank ,so reduce the cutting vibration.In the economically CNC milling process ,we have to place the cutting tools orderly and reasonably owing to a lot of time taken in sharpening ,measuring and replacement of the cutting tools by hand work .
