Study Of Verdict Technology Of Part Process Comparability In CAPP

CAPP (computer Aided process planning) appears with the rapid development of modern machinery manufacture and computer technology. Which makes use of the practical experiences of technician to process data, to make scientific decision, to create process regulations automatically, to aid the dimension calculation procedure, to plot working procedure drawings, to choose cutting parameter, to aid optimizing process planning and etc. And it also provides a powerful technological support for the digitalization, intelligentization and autoimmunization of process planning design.Advancing the functionality, practicality, adaptability and intelligence of CAPP have become the main trend of CAPP development. At present, it needs to adopt manifold method of process decision-making and multiplayer distributed system structure to attain this goal. How to match rational process route rapidly and accurately and how to quicken the designing course of process regulations upon a massive process-planning knowledge base are the one of the questions needed be settled presently. If we can verdict the process comparability of two parts based on their characteristics, a searching engine will be established on this point to search the comparable part's process with new part's, then design the variability of new part process. Which will enhance greatly practicality and intelligence of CAPP. And if we can verdict effectively the process comparability of two parts, a case-based CAPP system will be established.This paper put forth two routes that can settle the question of part processcomparability. Verdict process comparability according to like parts character, the one is to be considered that the like parts have comparable manufacture method and process regulations. The other is to use the attributes of process regulations, which are put in the process-base to verdict the comparability, and realize the collection of like process regulations.Through erecting index construction of the part and its characteristics, the study implements the characteristic modeling of parts, establishes case express based on characteristics, puts forth verdict arithmetic of comparability based on resemble unit and character structure-tree. And evaluates different verdict method.By picking up the process attributes from process base, the author established a process-case index model based on process-attribute and brought forward the arithmetic of object that possesses sequence connection. And evaluates its application.This paper establishes technology and test system, which is utilized to filtrate, validate and evaluate project. And settles the key technique of verdict of the process comparability through the study of thesis, at the same time, the study also provides powerful technique foundation for establishing the CAPP system case-base reasoning in Institute of mechanical manufacturing technology of CAEP.