الفهرس | Only 14 pages are availabe for public view |
Abstract Wire cUlling process is wide ly used for making stamping dies, tools, templates, extrusion dies, and progressive dies. It is also used for prototype production of parts to be made later by die stamping or CNC milling. The wire-EDM programming starts with a manual method. With the increased use of NC sys.tems and growth in complexity of production the manual programming became a tedious work, time consuming. The manual method depends to a very great extent on the experience of the operator, which leads to many human errors. So, the part programmer was no longer able to calculate efficiently the required tool path, and the use of CAM systems as an aid to part programming became a necessity. Many trails have been carried out to develop the wire-EDM programming methods. But, applications of many wire-EDM techniques in these m.ethods are not satisfactory and have different shortages. For example, generation of standard radius, sequence of wire path, fixation stabi lity, No-Core cut, etc. TIlliS, the objective of this thesis is to design a CAM system to sequence the wire path in a way to minimize the programming time, and generating the standard radius. No-Core cut, fixat ion stability, and optimizing the wire cutting process can be achieved through the proposed CAM system. Some of the wire-EDM techniques such as, making the conical xv cutting, trim cut, and calculating the optimum location for the threading point of th e wire, are also achieved through the proposed system. Through different applications of the proposed system, the results show a great saving in programming time, user effort, high precision for all steps of the cutting process, and a powerful monitoring. The proposed system uses an advanced simulating module for verifying cutting process, and to minimize calculation errors. The thesis consists of five chapters. Chapler one presents an introduction to the wire-EpM cutting process, wire-EDM machine tools, and the applications of the wire-EDM process. Also, the illustrations of the more relevant works as a literature survey finally the aim of this work. Chapler two contains the details of the wire-EDM cutting process and some of the wire-EDM techniques such as, standard radius, No-Core cut, taper cut, trim cut, etc. Chapler Ihree presents in detai ls the structure, the information flow, the main algorithm, and the flow charts of the proposed system. Chapler fOllr introduces the applications of the proposed system compared with LAMA, EasyCut and contains the output data of the proposed system. Chapler five illustrates the main results, conclusions and 0,. future work. Finally, the References were listed. Three appendices and the Arabic Summary have be.en provided in this thesis. Appendix A contains the ISO codes of the wire cutting. Appendix B contains j.Jlustration of the main technology codes. Appendix C offers the main functions of the job file. |