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Development of Machining Database System for Difficult-to-cut Materials

Author: RenXiaoPing
Tutor: LiuZhanQiang
School: Shandong University
Course: Mechanical Manufacturing and Automation
Keywords: Database Difficult to machine materials Cutting Optimization Hybrid Reasoning
CLC: TP311.138
Type: Master's thesis
Year: 2010
Downloads: 237
Quote: 3
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Abstract


Titanium, high temperature alloys and other difficult to machine materials, due to the ultra-high strength, high hardness, high toughness, high temperature resistance, corrosion resistance and other prominent feature in the aviation industry are widely used; CNC machine tools, machining centers and flexible manufacturing systems difficult processing materials processing applications more widely, are related to the amount of reasonable selection of tools and cutting CAM programming and CAPP planning, programming and operations staff or be based on experience in processing select cutting parameters, resulting in the cutting parameters is not standardized, processing efficiency low, so how to choose reasonable parameters, the accumulation of experience in the processing, and gradually optimize these process parameters to solve the difficult processing and low processing efficiency bottleneck problem is difficult to machine materials cutting applications a primary issue. Cutting database technology to the rapid development in the above demand. Papers from the theoretical model and system development two cutting difficult materials database system. Difficult to machine materials cutting of database systems theoretical model based on the development of the B / S mode cutting of difficult materials database system. To establish workpiece material sub data in the development process, the tool sub-database tool - workpiece matching sub-databases and cutting fluid sub-databases; cutting data optimization and process parameters to predict the function; to establish turning, milling, drilling, boring four processing methods instance library data structure and examples of coding schemes; hybrid reasoning of rules and examples. Finally, the development of the practical cutting difficult materials database systems. The system can be used to guide field operators and technical personnel selection difficult materials tools, cutting the amount of information. Cutting affect the critical parameters of the process. Cutting of difficult materials database system on the basis of the basic cutting data query, and from the point of view of the minimum processing cost and highest productivity cutting optimization, and labor intensity and machine tools unit time consumption optimization variables analyzed from the perspective of production management affected and the corresponding instance. The tool life, surface roughness, cutting force and other process parameters have a very important role in the cutting process. Difficult to machine materials cutting database systems using the empirical formula method to predict the process parameters, on the basis of test data collection, so as to more effectively guide the actual production. To case-based reasoning, rule-based reasoning supplemented by a mixture reasoning to achieve difficult materials Cutting database system with intelligence. By analyzing examples of coding, case retrieval and instance to modify individual reasoning steps to explore the implementation process of case-based reasoning, the specific method proposed instance hybrid reasoning. The rule inference rule validation reasoning or examples of solutions in the instance does not exist. This paper was supported by the National Science and Technology Support Program key projects (2008BAF32B01, and 2008BAF32B11) of high-end CNC machine tools and basic manufacturing equipment technology major projects (2009ZX04014-043, 2009ZX04014-012, 2009ZX04014-031), the National Natural Science Foundation of China (50828501), China Postdoctoral Science Fund (20070420208) and Shandong postdoctoral innovation projects of special funds (200,702,023) funding.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer software > Program design,software engineering > Programming > Database theory and systems > Database system: sub- system name
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