Tooth trace of variable stiffness serpents spring coupling is circular surface there is small clearance in tooth bottom

its machining is relatively difficult.Function and process of the coupling are analyzed

process scheme and the clamping schemes are determined

the fixture design charts is given

tool selection calculation is carried out.Processing process problems should be paid attention to is put forward

data acalculation method in processing is given using more economical process

processing of tooth trace circular surface is completed.