Graph aluminium alloy of 1 efficient treatment uses WSTAR broach Japan company of tool of material of 3 water chestnut rolls out broach of hard alloy of a whole recently -- " efficient treatment aluminium alloy uses WSTAR bit " , its characteristic is: Broach has 4 cooling opening (graph 1) , the optimal distributinging position that uses a fluid to emulate a technology to decide 4 cooling aperture (graph 2) , according to the characteristic that efficient bore machines aluminium alloy, design to getting channel and cutting blade appearance to undertake optimizing (graph 3) , make the axial thrust of broach reduced 5% ～ 15% , the efficient bore of the aluminium that can come true to stick a knife easily and aluminium alloy workpiece is machined. Graph the blueprint of 3 the chamfer that hold bit that are aimed at aluminium alloy the 2 maximize that design implementation cutting fluid to supply through fluid imitate computation CNC MillingCNC Machining