CUTTER BLADE FOR CUTTING TOOTH SURFACE OF SUPER-HARDNESS SPIRAL BEVEL GEAR

摘要

PURPOSE:To make a highly accurate gear machinable so favorably, by forming a main cutting edge of a cutter blade bearing the above caption, with a hard sintered body, while setting a rake angle, in time of being assembled in a cutter body, to a specified range, and forming a flank for the main cutting edge into a plane surface. CONSTITUTION:In case of a cutter blade for cutting a tooth surface of super- hardness spiral bevel gears, being built in with one or plural pieces on the circumference of a conical, annular cutter body, a main cutting edge 1 of each cutter blade is made up of a hard sintered body 2. In addition, an axial rake angle theta in time of being built in the cutter body 1 is formed to be +5 deg. or -5 deg., and a flank for the main cutting edge 1 is formed into plane surface. The hard sintered body 2 for the cutting edge 1 uses a cubic type boron nitride sintered body containing 55 capacity % cubic type boron nitride among those consisting of high pressure phase type boron nitride.