Research Of Tool Matching System For NC Milling Based On Processing Characteristics

With the in-depth study of the virtual manufacturing technology, in virtual NCmachining, option of NC milling tool is a key part of the virtual NC machining.Reasonable option of NC milling can provide critical data for the milling process,reduce the cost of production and processing, and has an important guidingsignificance in the actual processing.This paper has research according to the option of NC milling tool in NCmilling. First, base on the STEP-NC milling model, divide the NC milling partfeatures, and set up the milling characteristics model based on the processing features.After that, divide NC milling tool system into three modules, which is workingmodule, intermediate module and main shaft module. In order of easy Optiondatabase information is stored in NC milling tool, the modules should be encodedseparately. Then establish a mathematical model and assembly equation of NCmilling tool according to attributes of the modules. Classify the workpiece materialsin NC milling process, match the mechanical properties, chemical and physicalproperties of the workpiece material and tool material. Then establish the specificselection rules and procedures for NC milling tool. Finally, put forward systemicconcept mathematical model based on the demand analysis of NC milling tollselection system, and transform it into relational model which SQL Server2000database management system supports. After that, make development of NC millingtool selection system with VB6.0as development tool.In the actual milling process, the application of NC milling tool matchingsystem will make processing efficiency, and reduce the processing costs, whichprovide an important means in order to realize the intelligent milling. Lay thefoundation for the development of a variety of modern manufacturing technology.