Parametric drawing system of three pieces parallel divided cam driven units on AutoCAD2006 is introduced,it is developed by using the second development system of AutoCAD2006 and the language of AutoLISP.

Study on virtual design of the parallel indexing cam mechanism;

Cubic NURBS expression for contour curves of parallel indexing cam

This paper forms the CAD mathematical model for the working line of parallel indexing cam through the analyzing of the principle of parallel indexing cam,at the same time,gives the specific designing calculation procedure,thus reduces the complex designing,abbreviates the designing period,increasing the designing precision.

Establishment of parallel index cam dynamic model;

According to the concept of instantaneous velocity center,the simple expression for determining position of velocity center is derived,and the CAD graphical method for designing theory profile curve of parallel index cam is carried out.

In this paper,general calculating formulas for pressure angle of the parallel index cam mechanism are worked out by use of the complex polar vector method.

The speed-ratio curve of double-action parallel indexing cam mechanism has special property in shape,which makes it is not available from present transmission function,but designed purposely.

For double-action parallel indexing cam mechanism,the characteristics of its instantaneous center curve are determined by the mechanism’s speed-ratio.

This paper proposes double action parallel indexing cam mechanism,and studies cams profile by methods used in gear meshing.

This paper focused on the investigation of the mode characteristics of ring-plate planetary indexing cam mechanism.