The new method——lean-revolve method is designed for the laser precise drilling of ceramic material, in which the work piece or the laser beam is inclined with some certain degree and the work piece is revolv.

Computer aided 3dimensional graphic solution for opening value of cross rolling pass;

With the aid of FE code MARC/Autoforge, 3-D coupled thermo-mechanical analysesof round-billet during two-roll cross rolling process have been conducted and the distribution patternsof strain and stress in its deformation zone are presented.

This thesis is an original experimeiuon cross rolling bar stirface deformation byimpressing-picture grid method.

Numerical simulation of copper ball forming process during skew rolling;

Experimental analysis of rolling force influence factor of anchor rod skew rolling;

Research on mathematics model curved surface of roller for skew rolling;

With a view to studying the modeling of the rotary tube piercing, the influence of the separating force on the roll opening of the rotary rolling piercer, the parameters of the piercing deformation and lateral uniformity of the wall thickness of the shell pierced are theoretically analyzed.