With the X-ray stressmeasurer, the residual stress of machined surface was measured when aluminum alloy be fine-cutted by cemented carbide on different cutting condition.

Effects on choking by grinding wheel characteristic and cutting condition are expounded.

This profile modeling functions as follows: The cutters point is made to move along the locus in compliance with the outline curve of the cam to be machined; the cutter is constantly ensured to have good cutting conditions in cutting process.

Defining metal work of hard-to-cut metal material, cutting conditions,tool shap es,metal material used in die & mould with discussing hardness.

Some equations of anisotropic acousto-optic (AO) diffraction geometry have been derived by the aid of tangent condition.

In order to improve the performance of lithium niobate acousto-electro-optic(AEO) modulator,the acousto-optic operating modes were systematically studied according to tangent condition after the determination of electro-optic operating mode.