According to the special geometric structure of turbine blade and the forging procedures, this article analyzed some factors which influencing allowance for machining, then discussed how to add the allowance to different parts of blade through expanding and extending the profile of blade, finally confirmed the allowance magnitude of differe.

The paper discusses in detail the principle of selecting the stock of turbine blade and determining the allowance for machining the stock.

Research of destruction layer of ground optical glass and founding process redundancy of fine-grinding and polishing;

Analysis of Allowance and Dimensional Determination of Investment Casting;

Analysis on the Allowance of Involute Gear Based on VC++ 6.0;

This paper puts its emphasis on introducing the computer calculation of allowance.

Firstly the layout problem was connected with the manufacture process,and each side of the polygon was expanded to preserve machining allowance.

After taking semi-finish machining to complex contour curve by using the processing center or three coordinates digital milling machine and measuring on-line with seeking border,we can obtain accurate finish machining allowance and amend the cutter radial compensation through analyzing and calculating.