复杂圆柱零件专用组合加工平台工艺系统研究
[Abstract]:Machining process is the link between mechanical product design and actual production. Because of the strong dependence on the production environment, the design process of mechanical product design process is very uncertain. Moreover, the quality of the process design will directly affect the production efficiency, organization and management, product quality and manufacturing life cycle of the enterprise. In recent years, manufacturing activities are mostly faced with a multi-variety, small-batch production model. Complex cylindrical parts are one of the main production objects in manufacturing industry. Complex cylindrical parts are one of the main problems faced by manufacturing industry because of their complex shape and structure, difficulty in clamping and difficulty in process design. The content of this paper is the process decision and optimization of the special machining platform for complex cylinder. Firstly, the process optimization decision scheme of complex cylindrical parts based on ant colony algorithm is proposed, and the mathematical model of characteristic element process sequence constraint is established. Secondly, the modeling process of ant colony algorithm and the mathematical modeling process of process optimization scheme based on ant colony algorithm are described in detail. In order to improve the practicability of the process optimization decision scheme of complex cylindrical parts based on ant colony algorithm, a process optimization system based on ant colony algorithm is developed, and the design process of the system is described in detail. The fixture of complex cylindrical parts is designed. The specific contents of the study are as follows: 1. This paper briefly introduces the source of the project, probes into the domestic and international research status of the machining technology of complex cylindrical parts, and summarizes the status quo of the process optimization decision scheme. The constraint problems in the process planning of complex cylindrical parts are analyzed. Firstly, the features of the parts are classified, and the machining schemes of common typical features are summarized. In this paper, the constraint relation among different features of parts is analyzed, the definition of feature element and machining element is given, the constraint problem of feature process sequence is modeled, and the method of establishing constraint matrix is put forward. The process decision optimization scheme based on ant colony algorithm is put forward, the modeling method of ant colony algorithm is introduced, the objective function of process optimization scheme based on ant colony algorithm is determined, and the calculating formula of distance between different machining elements of parts is put forward. The mathematical model of process optimization decision of ant colony algorithm is established, and the GUI interface is written with MATLAB2014a. The feasibility of the method is verified by an example. A process decision optimization system based on ant colony algorithm is developed, and the system is tested by an example. The results show that the system can generate a process route. 5. Aiming at the production mode of single, multi-variety and small batch of complex cylindrical parts, the combined fixture is designed in the production process of complex cylindrical parts.
【学位授予单位】:西安工业大学
【学位级别】:硕士
【学位授予年份】:2016
【分类号】:TH16
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