Research On CAD/CAM For Micro-EDM Machining

The technology of machining micro-part with micro-EDM is developed rapidlyin recent years. CAD/CAM for Micro-EDM Machining plays a very important rolein the process of development of Micro-EDM applications. In this thesis, automaticprogramming technologies for WEDM and Electrical Discharge Milling Machining(EDMM) are studied. The main contents of this thesis are listed as follows: In this thesis, some basic algorithms in NC milling automatic programming areimproved, such as judging the direction of wire and judging the relations betweenwires. The algorithm of calculating the optimum angle between scan-line and x axisis presented, in which the distance of two adjacent scan-lines is taken into account.Strategy of real-time compensation for electrode loss in EDMM which based onzigzag machining and the principle of laminated removal is investigated. Based onresearches mentioned above and ACIS geometry platform, the module of EDMMautomatic programming with real-time electrode loss compensation is implemented. Based on geometric properties of spur gear and WEDM machining mode, a geardesign module has been added to the automatic programming software of WEDM.The indispensable conditions of micro-gear design have been discussed, and analgorithm to judge whether the interference will happen during gear meshing hasbeen put forward. Based on these researches, a module of micro-gear designincluding micro-gear meshing simulation has been developed. The correctness ofmachined gears without interference has been assured by simulation of the gearmeshing process. The machining experiment verifies the correctness of thealgorithms mentioned above.