CNC milling cutting work with high-speed, efficient features, compared with conventional milling cutting, higher CNC milling tool for machining requirements, milling tool rigidity, strength, durability and installation adjustment method will directly affect machining efficiency; the tool itself precision, dimensional stability will directly affect the machining accuracy and surface quality of the machined workpiece, a reasonable selection of cutting tools is an important part of CNC machining process.
1. The hole machining tool selection
1) CNC machine tools in general no drill hole machining mode, due to the rigidity of the drill cutting conditions and poor selection of drill diameter d l / d≤5 (l for drilling depth) of conditions should be met.
2) Before drilling first with center drill positioning to ensure the accuracy of the positioning hole machining.
3) can be used for reaming fine floating reamer, reaming before opening to be chamfered.
4) Boring should try to use symmetric multi-blade cutting boring heads to balance the radial force, reducing vibration boring.
5) Try to choose thicker and shorter Arbor, cutting to reduce vibration.
2. Milling Tool Selection
1) throwaway inserts indexable carbide inserts for milling cutter is mainly flat, while roughing cutter diameter smaller election, when precision milling cutter diameter larger election, when allowance is large and more than when uneven amount, choose a small number of the tool diameter, otherwise it will cause too deep because knives marks affect the processing quality of the workpiece.
2) When the three-dimensional surface or contour of the workpiece becomes oblique, often using ball-cutter, circular cutter, drum-shaped cutter, taper cutter, disc cutter.
3) high-speed steel end mills used for machining bosses and grooves. If allowance is small, high surface roughness, the choice of inlaid ceramic inserts CBN blade or blade end mill.
4) rough rough surface or hole can be used carbide inserts corn milling heavy cutting.
5) high precision machining grooves, the choice of a smaller diameter than the width mills, milling the middle part of the first, and then use both sides of the milling cutter radius compensation slot.