On the base of analyzing the defect of involute helical gear shaper

this paper has discussed the preciseness of this gear shaper’s effect on quality of the profile of gear

and the cause of error

has concluded theoretical equation and equation of engagement of the precise flank of gear and mathematical description.Discussed the forming method of flank of correct gear of gear shaper.And has compare the preciseness of these two method of feeding.And has proved that it is possible to form high princiseness gear shaper which has reasonable gringing angle by correcting the flank of gear.By make some difference to the delicate grinding process of flank of gear

it can be finished by usual technology and equipment.