The invention discloses a hard
tooth surface gear finish turning process. The process comprises the steps that 1, a gear workpiece is roughly machined, a tooth turning process is adopted,
machining allowance is reserved on the
tooth surface of the workpiece, the
tooth root of the workpiece is dug, and after rough
machining is finished, heat treatment is carried out; 2, finish turning is carried out on the gear workpiece subjected to rough
machining, a tooth turning process is adopted, the machining allowance of the
tooth surface of the workpiece is
cut off by the side edge of the cutter tooth,and the
tooth root of the workpiece keeps the
surface layer of heat treatment. A design method of a tooth turning tool of a hard tooth surface gear comprises the following steps of 1) the rake angleof the tooth turning tool is designed to be a negative angle, and the rake surface is designed to be a
conical surface or a curved surface easy to
grind; and 2) according to the flexible adjusting method of the working angle of the cylindrical tooth turning tool, the working angle of the tooth turning tool is made to fall within a preset range which is most suitable for finish machining of hard tooth surface gear workpiece with one certain
hardness, and a
gear cutting edge curve is calculated. Hard tooth surface gear machining efficiency is high, the using cost is low,
gear transmission and
noise reduction are facilitated, and the tool service life is long.