In order to meet the requirements of manufacturing precision, production efficiency, clean production and quality improvement in gear processing industry, the gear machine tool and gear making technology have appeared the development trend of "full numerical control".Through CNC control of each moving shaft of the machine tool and linkage between some shafts, it has the following advantages:

1）Enhance the role of CNC lathe, such as rolling small taper and drum transmission gear more and more simple.

2）When the transmission chain is shortened and the semi-closed loop or full closed loop control is adopted at the same time, the positioning accuracy and repeated positioning accuracy of each axis can be improved through numerical control compensation, so as to improve the machining accuracy and CP value of the machine tool and improve the reliability of the machine tool.

3）When changing varieties, gear shaper machine also saves the time to replace the inclined guide rail, thus reducing the auxiliary processing time, increasing the flexibility of the machine, saving the time to calculate and replace the change gear, differential gear, feed and spindle gear.

4）As mechanical structures become simpler, it can be designed to better improve machine tool rigidity and minimize thermal deformation.

5）There is no mechanical connection between the shafts, and structural design has become typical, which is more conducive to the implementation of modular design and manufacturing.