【摘要】：船用柴油機素有“船舶心臟”之稱,其制造水平是船舶制造業(yè)中競爭的重要籌碼。因船用柴油機結(jié)構(gòu)本身的復(fù)雜性,通用軟件不能滿足企業(yè)對加工的特定需求,主要表現(xiàn)在加工信息離散、準確性差、效率低等方面,企業(yè)的發(fā)展也因此受到限制。經(jīng)分析認為,船舶柴油機數(shù)字化制造集成系統(tǒng)可有效解決上述問題。因此,本文以數(shù)字化制造平臺建設(shè)為目的,開發(fā)船用柴油機關(guān)鍵件集成CAM系統(tǒng),對船用柴油機關(guān)鍵件的特征加工、后置拼接、加工仿真及NX CMM測量編程方面展開了研究,提高了船用柴油機的數(shù)字化制造水平。課題主要的研究內(nèi)容與成果如下:(1)針對現(xiàn)階段船用柴油機關(guān)鍵件設(shè)計制造過程中存在的幾何信息與非幾何信息分開存儲導(dǎo)致的信息離散問題,采用基于主模型統(tǒng)一數(shù)據(jù)源的方案。將定義的加工特征信息統(tǒng)一存儲于三維主模型中,作為設(shè)計制造環(huán)節(jié)的唯一依據(jù),為CAM系統(tǒng)提供完備的加工數(shù)據(jù),從而避免了因信息不統(tǒng)一導(dǎo)致數(shù)據(jù)沖突,提高了系統(tǒng)穩(wěn)定性。(2)根據(jù)主模型和MBD技術(shù)的內(nèi)涵以及船用柴油機關(guān)鍵件的結(jié)構(gòu)特點,建立了加工特征刀軌庫,分析了船用柴油機關(guān)鍵件設(shè)計特征到加工特征轉(zhuǎn)換的數(shù)學(xué)模型,確定了加工特征的類型劃分及信息表達與提取方式,并提出建立NX/CAM對象類庫的方法,為船用柴油機關(guān)鍵件的特征加工奠定基礎(chǔ)。(3)針對通用后置處理器不能滿足企業(yè)對NC代碼輸出格式要求的問題,結(jié)合企業(yè)實際需求和船用柴油機制造企業(yè)軟件平臺的特點,建立了船用柴油機關(guān)鍵件專用后處理器的框架,并實現(xiàn)與CAM系統(tǒng)的集成。針對船用柴油機關(guān)鍵件因采用特征加工方法存在代碼離散的問題,提出后置拼接的概念,研究了代碼拼接與加工間的映射關(guān)系。另外,為確保CAM系統(tǒng)生成NC代碼的正確性,確定了利用VERICUT軟件進行虛擬加工仿真的方案,縮短生產(chǎn)準備時間的同時可有效地避免事故發(fā)生。(4)針對船用柴油機關(guān)鍵件加工成本高、測量難度大等特點,提出了基于主模型的船用柴油機關(guān)鍵件NX CMM測量編程方法。研究了測量編程預(yù)處理及具體實現(xiàn),并通過實驗進行驗證,實現(xiàn)了加工測量一體化。(5)通過以上幾個方面內(nèi)容的研究,利用NX二次開發(fā)工具,完成了集成CAM系統(tǒng)的開發(fā)工作,并通過軟件的實際應(yīng)用驗證了其實用性及可靠性。為促進基于主模型統(tǒng)一數(shù)據(jù)源技術(shù)在船舶行業(yè)的應(yīng)用做了有益的探索。
[Abstract]:Marine diesel engine is known as "the heart of ship", and its manufacturing level is an important bargaining chip in the shipbuilding industry. Because of the complexity of the structure of marine diesel engine, the general software can not meet the specific requirements of processing, which is mainly reflected in discrete processing information, poor accuracy, low efficiency and so on. Therefore, the development of the enterprise is limited. It is concluded that the digital manufacturing integration system of marine diesel engine can effectively solve the above problems. Therefore, in order to build a digital manufacturing platform, this paper develops an integrated CAM system for the key parts of marine diesel engines, and studies the feature processing, post-assembly, machining simulation and NX CMM measurement programming of the key parts of marine diesel engines. The digital manufacturing level of marine diesel engine is improved. The main research contents and results are as follows: (1) aiming at the problem of information discretization caused by the separate storage of geometric information and non-geometric information in the design and manufacture of key parts of marine diesel engine at present, The scheme of unifying data source based on master model is adopted. The defined machining feature information is stored in the 3D main model as the sole basis of the design and manufacture, which provides complete processing data for the CAM system, thus avoiding the data conflict caused by the information disunity. The stability of the system is improved. (2) according to the connotation of the main model and MBD technology and the structural characteristics of the key parts of marine diesel engine, the machining characteristic tool rail library is established, and the mathematical model of the transformation from the design features to the machining features of the key parts of the marine diesel engine is analyzed. The classification of processing features and the way of information expression and extraction are determined, and the method of building NX/CAM object class library is put forward. It lays the foundation for the characteristic processing of the key parts of marine diesel engine. (3) aiming at the problem that the general post processor can not meet the requirements of the NC code output format of the enterprise, combining with the actual demand of the enterprise and the characteristics of the software platform of the marine diesel engine manufacturing enterprise, The frame of the special post processor for marine diesel engine is established, and the integration with CAM system is realized. In order to solve the problem of code discretization in key parts of marine diesel engine by using feature machining method, the concept of post-stitching is proposed, and the mapping relationship between code splicing and machining is studied. In addition, in order to ensure the correctness of NC code generation in CAM system, the scheme of virtual machining simulation using VERICUT software is determined, which can effectively avoid accidents while shortening the production preparation time. (4) aiming at the high processing cost of the key parts of marine diesel engine, Based on the main model, the NX CMM measurement programming method for the key parts of marine diesel engine is proposed. The pre-processing and realization of measurement programming are studied and verified by experiments. (5) through the research of the above aspects, the development of integrated CAM system is completed by using the NX secondary development tool. The practicability and reliability of the software are verified by the application of the software. In order to promote the application of the unified data source technology based on the master model in the shipping industry, the paper makes a beneficial exploration.
【學(xué)位授予單位】：江蘇科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：U664.121

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本文編號：2291950