Tool life for low production problems arise, we focus on the tool material and tool diameter has been improved, the basic structure to maintain the shape of the tool of FIG. High-speed steel cutting tools made of hard material to carbide yg6x, resizing tool diameter for ø7 + 0.020 + 0.025mm. The trial, which significantly increased tool life, machinability 25 crank, but the cost of doubling the tool.
Further improvements through four pairs of milling cutter preliminary results improved tracking and found easy chipping carbide cutter, cutting knife, comprehensive benefits processing is not very satisfactory, after analysis, decide on further improvements cutter:
Material selection tool wear, bending performance than yg6x carbide grade yl 10.2.
Blade width increased from 0 05mm to 0.1mm.
After the end of the blade angle decreases from 12 ° to 10 °, flank width increased from 0.8mm to 1.2mm, in order to improve edge strength.
Increased chip flutes space boundary rake angle increases from 40 ° to 60 °, so as to effectively avoid blocking knife phenomenon caused when the vertical feed, so Duandao basic problem is resolved.