A mathematical model for calculating the optimal geometric parameters of boring cutters is developed using the constraint optimization approach offered by ANSYS.

The boring cutter for ultrasonic torsion vibration boring holes is designed and the technique of design is discussed.

By analysing the problems existing in boring,the article puts forward a method to improve the boring cutter.

One kind of PCD boring tool and a fine adjustment boring bar,which are suitably used in precision finishing the surface of pinhole of combustion engine piston,are introduced.

In this paper, the quantitative relation between the mounting angle of boring tool and boring cutting face outline in boring process can be reasoned from discussing the movement of rotation error of boring machine spindle, thus it is possible to optimistically seek mounting angle so as to obtain the best processing effect.

Aiming at the limitations of the way to increase the static stiffness of the boring bar,this paper adopts a novel thinking way that aggrandizes the dynamic stiffness of the boring bar to design a bar with a vibration absorption system in the boring bar.

Aiming at the limitations of the way to add static stiffness of the boring bar, this paper adopts a novel thinking way that adds the dynamic siffness of the boring bar to analyze a bar with a reduce vibration system in the boring bar.