Research And Exploitation On Cutting Simulation System Of Machining Center Based On Virtual Manufacturing

Cutting simulation is a part of virtual manufacturing, which simulates actuallycutting process by means of Virtual Reality and Simulation Technology. It can verifythe Numerical Control(NC) machine programs in order to reduce or replace the testprocess. In this paper, based on the analyses and investigation of current achievementsof vertical milling center, further research has been done in the following aspects.1.Disassemble machining center into parts, accessory and components byhierarchical modeling function. These three parts compose the three levels assemblingtree of the machine tools, and in this way, the geometry modeling of vertical millingcenter is founded. The movement modeling is founded by matrix operation based onits geometry modeling. The geometry structure modeling of ATC is put forward in theprocess of building the geometry modeling.2. This system code compiler, based on analyzing the character of NC code andthe theory of code compiler, is designed. This compiler includes analysis module ofaccidence, expression and data processing module. This compiler adopts realinterpolation arithmetic of NC system, replacing the disperse calculation methodbased on small time slice anciently.3. Available management of tool data-base. The solid model of end milling cutterwith third dimension is founded by B-rep molder method and OpenGL technology.This cutter model is based on existing theory of helix model. The management ofcutter, based on analyzing the character of cutter, is realized using ODBC data-baseknowledge. This module can accomplish the lookup, editing, adding and deleting.4. The part model and cutter simulation model, which is based on Z-orientatedsmall-cuboid dispersing method, is founded. The cutting process is realized throughthe one-dimensional bool operation which happens on the Z-orientated between thepart and cutter. In the cutting process, the multi-angle observation to part andauthentic simulation of the movement between cutter and part can be realized. At thesame time, the simple cartoon expression method of the movement of changing cutterautomatically is put forward.