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Optimizing Merged Machining Operations of Integrated Numerical Controllers based on ISO 10303:238 (STEP-NC)
Beheshti, Mina | 2016
565
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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 49008 (01)
- University: Sharif University of Technology
- Department: Industrial Engineering
- Advisor(s): Houshmand, Mahmoud; Fttahi, Omid
- Abstract:
- Right now, the common standard for programming of CNC machines is ISO6983 which is also called G-code. This standard provides very low level information that only contains information about basic measurements and tool movements. Moreover, it splits the CAD/CAM/CNC chain and makes it difficult to gather feedback from shop floor. A global attempt led to development of a new data model for programming CNC machines. STEP-NC standard which is developing based on STEP is aimed to resolve shortages of G-code. The STEP-NC based controllers, can be categorized into three major groups in terms of programming: indirect, interpreted and adaptable. In this project, in order to develop the third category of STEP-NC based controllers, a model is suggested. In the model, it is assumed that machining operations of N separate parts and the dependency of operations for each part is available in the form of a STEP-NC file. The objective is to obtain an optimized sequence for machining all the N parts by minimizing machining time. In order to calculate the desired sequence, an operation research model in sequencing domain is modeled and solved
- Keywords:
- Computer Integrated Manufacturing ; Machining ; Standard for Exchange of Product Data (STEP) ; Sequencing ; Computer Numerical Control (CNC) ; Machining Economics
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