The paper describes the characters of deformability of material and the rules of variability of force by making a simulation and analysis among the cold-drawing cold-rolling and cold-extruding techniques for producing the big diameter square tube with ANSYS/DYNA.

Ultrasonic broaching of a waveguide cavity;

The method of ultrasonic broaching waveguide entocoele mentioned in th e article is the impulse machining method, in the broaching process the broachin g tool is thrown over the vertical ultrasonic vibration to obviously improve wor king accuracy and surface quality of waveguide entocoele.

This thesis intruduces the design and construction of the deep pushing and squeezing method applied on a warehouse project.