Based on the analysis of the pitch error measure theorem for screw,the dynamic measure system of pitch error for lead screw constituted by single-chip microcomputer is discussed.

The reason of different surface quality between two sides of groove while whirlwind milling the lead screw is analyzed, and the special facing cutter for milling the lead screw is designed.

This paper has a study on error compensation theory of lead screw transmission and discuss the method to measure the screw error and establish the error compensation table.

Conditions of Effect of Screw Torsion Deformation to Transmission Rigidity;

Influence of Torsion Deformation of the Screw on Electromechanical Rigidity;

The automatic demolding mechanism with feed screw of ball bearing and gear with cavity is used in the mould, and through disconnecting the plastics from cavity smoothly by rotation of the cavity with screw, the question of demolding is resolved.

Improvement of adjust leadscrew of four-roll crusher used in sinter plant;

The force-induced deformation of a precision long leadscrew during grinding is theoretically analyzed, and according to the grinding complex usually adopted in practice, computer simulation of force-induced deformation is carried out.

Screw shaft is widely used as driving piece and locating piece, it plays an important role in mechanical industry, and inversely the developing of industry demands of more high precise screw shaft.

Consequently it not only serves as driving piece and locating piece, but also serves as measuring piece, it plays an important role in mechanical industry, and inversely the developing of industry demands of more high precise screw shaft.