Based on UG secondary development tools, by using parameterized design method, the solid models of cutter and gear roughcast are established,and the dynamic simulation of machining process with preshaving hobs is carried out according to the principle of gear machining.

The paper explores such problems of gears machining as antenna length calculation,shaving stock and addendum modification of preshaving hob,hoping to provide methods,which have been proved theoretically correct,of designing this kind of gear tools.

Based on the principle and method of software engineering, the CAD system of preshaving hob is developed by using the techniques of OOP, ODBC and ARX.

There is a strange self-balance mechanism in ecosystem,which is like a piece of harmonious razor,also named as balance razor.

This paper develops a mathematical model for the solution to the longitudinal tooth curve of an internal gear shaver based on the simplified principle for space transmission of a helical gear pair without flank clearance,and proposes a calculating approach of the profile modification of the grinding wheel to be used for grinding the longitudinal tooth curve of the shaver.

The authors analyse the shaving process, study the shaving mechanism and point out that boa use of the intersection between the shaving cutter surface and the unshaved afar tooth surface in space, the cutting edges of shaving cutters remove the intersecting part of the gear and envelope the gear tooth surface under the role of shaving motions.

However, after shaved by shaving cutter with true involute profiles, there are the "mid-concave" phenomena on the pitch points of shaved gear tooth profiles inevitably.

The raker sharpening technology of gear shaving tools based on the balanced shaving;