Study And Practice Of The Technique Of Clapboard Of Turbine Compressor CAD/CAPP/CAM

Clapboard as part of turbine compressor is more important. Clapboard CAD/CAPP/CAM is the abbreviation of using computer to design, technics and manufacture. It is developed on the base of the theory of entity sculpture, derive CAPP and interpolation algorithm. The technology of built entity is the core of CAD system, and it is also a basal measure to finish computer manufacture. The drive CAPP system is on the base of group technology Interpolation algorithm is the common method of numerical control process programming. According to different arithmetic we can learn the poison of the tool center. At last it generate NC code of machine. So this is more important to CAM. IGES is the abbreviation of Initial Graphics Exchange Specification. And it is a conversion standard of graphics. PROENGINER software uses it to exchange date to others. If you want to exchange dates to other CAD software through IGES,the IGES interface is necessary. It includes pre&past processing. The pre-processing is used to import files. On the other hand, the past processing is used to export files. This paper has shown the process and result how to gain and organize the dates of NURBS plane. Then we built the three-dimensioned numerical control program in ourselves conditions. On the base of IGES files the information of point, line, circle and revolve plane is obtained. We also gain other interrelated dates to built geometric information of CAM. The boundary of clapboard is made by the spread points obtained by IGES file to build a close graphics. The orientation angle is confirmed by the NURBS curve interpolation formula. IA common approach is to approximate curves by biarcuate. The biarc methods for the constructing of arc splines have the following advantages.Firstly, it is simple.Secondly,it has almost no limitation while it is used.Thirdly, the two end points of the biarcs in the arc splines are exactly the points on the curves approximated, and the arc splines preserve the tangent vectors at these points. Therefore, the methods are more widely used based on single arcs. At last the way to smooth and analyze the error of curve is introduced. The technological crux in manufacturing clapboard is :properly arrange the numerical control manufacturing line, set tool coordinates, determine the numerical...