It is desired that a new material for siting line part will possess high abrasion resistance,high heat resistance and thrength of elevated temperature which should close to that of casting iron.

Study\ of\ manufacturing\ solid\ parts by laser sintering ceramic powder;

Applying Materials Elastic Deformation Theory to Fabricate Program Part;

Laser Hardening of easy Distortion Parts;

Discussion of the Simplification Processing Method for the Parts Model Programming;

Reasonalization on machining process of parts during the designing of machinery products;

Intersection algorithm for discrete and complex surfaces of spare parts in engineering machine;

Aiming at the machine spare parts blemish assesses the problem,making us of image recognition technique,to the blemish part proceeding arithmetic figure resemble,the picture prepares to handle,the picture analyzes to withdraw with the characteristic,here the foundation is last,proceeding to the typical model blemish the mode identify.

This paper explain size demarcate rationally on spare parts in some way,in order that students understand major claims of the size demarcate.