Objective To determine the optimal thread pitch for an experimental cylinder implant in Ansys Work-bench Design Xplorer environment.

In order to meet the demands of production technology and achieve rational filling quantity and rate, stabilize the filling process,the author described the following items to be improved:thread pitch,diameter of helical blade, diameter of belt roller,cone belt of charge

Study and Application of the Calculation Method of the Helical Surface Pitch Error;

Measuring pitch of adjustable pitch airscrew with boring machine;

Study and application of calculation method of helical surface pitch error;

The helical pitches of the N*-LC were measured and the regularities of change were analyzed.

By virtue of Finite Element Method DEFORM-3D software and rolling experiment,the effect rules were analyzed in detail,which include the rule of tooth top slope of dies to dimensions(such as tooth height,screw pitch) of trapezia helix tooth shaft and the rule of the tooth top slope to the fracture in the center of the roller.

The results showed that the ordinary method of varying screw pitch can not make the screw food distribution uniformty,but the method of varying the thickness of nuts' teeth can make it better,and the life of the screw will be longer.

Abstract This paper introduced how to set up the parametric expression of concrete-mixer truck drum logarithm helical curve in the spherical reference frame, and figure out the screw pitch expression by the drum s design parameter.