The plastic strip-insert with oblique teeth has the greater heat transfer invigoration effect compared to twisted-insert smoothly,the heat transfer strength scope is 5 times than the traditional plastic belt,it is suitable to the numerous quantity low speed flow heat-changer with speeds of 1.

Transmission efficiency of powder metallurgy helical gear system;

Simultaneous-control model for hobbing of noncircular helical gears;

Multi-objective optimization design of the bevel wheel based on QPSO;

According to the motion control characteristic of bevel wheel CNC shaping, this paper brings forward conceive of DSP chip multishaft motion control theory both in hardware and software.

It presents the method of measuring manufacturing precision of bevel cylindrical gear by the three dimensional coordinate meter,that is,measuring three dimensional coordinate values of bevel gear profile by the three dimensional coordinate meter,and analysing the data of coordinate values by the method of least squares,obtaining gear profile errors of bevel.

This paper studies the bevel gear slotting numerical control technology on base of DSP chip,and raises the point of view that use virtual axis interpolation technology and use software to realize the electronics gear differential technology.