發(fā)布時(shí)間：2018-05-12 01:18

  本文選題：工藝規(guī)劃 + 旋轉(zhuǎn)葉輪　； 參考：《重慶大學(xué)》2012年碩士論文

【摘要】：工藝規(guī)劃是工藝設(shè)計(jì)人員根據(jù)機(jī)械制造工藝學(xué)的相關(guān)原理和方法，規(guī)定產(chǎn)品或零件制造工藝過(guò)程和操作方法的關(guān)鍵技術(shù)活動(dòng)，科學(xué)合理地進(jìn)行產(chǎn)品工藝優(yōu)化決策是企業(yè)核心技術(shù)競(jìng)爭(zhēng)力的重要體現(xiàn)，也是提高企業(yè)生產(chǎn)效率、降低制造成本和生產(chǎn)能耗的有效手段。旋轉(zhuǎn)葉輪是渦輪機(jī)的核心部件，其加工質(zhì)量對(duì)渦輪機(jī)性能有決定性的影響，但其結(jié)構(gòu)復(fù)雜，特別是復(fù)雜的葉片曲面加工一直是制約產(chǎn)品整體性能提升的瓶頸，也是衡量葉輪加工工藝水平的重要標(biāo)志，因而關(guān)于旋轉(zhuǎn)葉輪工藝改進(jìn)優(yōu)化的研究一直是機(jī)械制造領(lǐng)域的一項(xiàng)研究熱點(diǎn)。 鑒于工藝規(guī)劃在機(jī)械制造領(lǐng)域的重要性和旋轉(zhuǎn)葉輪的重要功用及其結(jié)構(gòu)特征，本文以整體提升旋轉(zhuǎn)葉輪機(jī)械工藝決策水平為研究目的，以重慶某增壓器廠的葉輪產(chǎn)品為研究對(duì)象，提出了一套旋轉(zhuǎn)葉輪機(jī)械工藝決策方法，并基于該方法設(shè)計(jì)了一套原型系統(tǒng)，從而為旋轉(zhuǎn)葉輪加工工藝的優(yōu)化決策提供技術(shù)支撐。 首先，研究旋轉(zhuǎn)葉輪工藝路線優(yōu)化方法。根據(jù)旋轉(zhuǎn)葉輪的結(jié)構(gòu)特征，，將工藝人員實(shí)踐經(jīng)驗(yàn)和科學(xué)算法有效結(jié)合，提出一種基于模糊綜合評(píng)判和遺傳算法的旋轉(zhuǎn)葉輪工藝路線優(yōu)化決策方法，通過(guò)基于模糊綜合評(píng)判的工藝特征加工方案決策和基于遺傳算法的工序/工步優(yōu)化排序，最終得到可行并優(yōu)化的工藝路線。 其次，研究旋轉(zhuǎn)葉輪切削參數(shù)優(yōu)化方法。通過(guò)分析旋轉(zhuǎn)葉輪加工特征，建立面向多工序的切削參數(shù)優(yōu)化模型，并根據(jù)優(yōu)化問(wèn)題特征設(shè)計(jì)一種復(fù)合形算法對(duì)模型進(jìn)行求解，最終得到科學(xué)合理的切削參數(shù)。 再次，對(duì)機(jī)械工藝決策過(guò)程中的部分關(guān)鍵技術(shù)進(jìn)行了研究。考慮生產(chǎn)過(guò)程中工序質(zhì)量預(yù)測(cè)和出現(xiàn)質(zhì)量問(wèn)題時(shí)的有效追溯，研究工序關(guān)聯(lián)關(guān)系；考慮在工藝設(shè)計(jì)階段有效規(guī)避生產(chǎn)過(guò)程中頻繁出現(xiàn)的瓶頸工序，研究瓶頸工序預(yù)測(cè)方法與規(guī)避及處理策略；提出一種工時(shí)定額制定方法，實(shí)現(xiàn)工時(shí)定額的科學(xué)規(guī)范管理。 最后，基于上述方法體系，設(shè)計(jì)了一套旋轉(zhuǎn)葉輪機(jī)械工藝決策支持原型系統(tǒng)，包括系統(tǒng)業(yè)務(wù)流程、技術(shù)方案、體系結(jié)構(gòu)、功能模型以及數(shù)據(jù)庫(kù)信息模型等的設(shè)計(jì)。并將本文研究?jī)?nèi)容在重慶某增壓器廠葉輪產(chǎn)品的工藝設(shè)計(jì)中進(jìn)行了應(yīng)用，取得了良好的應(yīng)用效果。
[Abstract]:Process planning is a key technical activity in which process planners specify the manufacturing process and operation methods of products or parts according to the relevant principles and methods of mechanical manufacturing technology. Scientific and reasonable decision-making of product process optimization is an important embodiment of the core technological competitiveness of enterprises and an effective means to improve production efficiency and reduce manufacturing costs and production energy consumption. Rotating impeller is the core part of turbine, and its machining quality has a decisive effect on turbine performance, but its structure is complex, especially the complicated blade surface processing is the bottleneck to improve the overall performance of the product. It is also an important indicator to measure the processing technology level of the impeller, so the research on the technological improvement and optimization of the rotary impeller is always a hot research topic in the field of mechanical manufacturing. In view of the importance of process planning in the field of mechanical manufacturing and the important functions and structural characteristics of rotating impeller, the purpose of this paper is to improve the level of technological decision-making of rotating impeller machinery as a whole. Taking the impeller products of a turbocharger factory in Chongqing as the research object, a set of technology decision method for rotating impeller machinery is put forward, and a prototype system is designed based on this method, which provides technical support for the optimization decision of rotary impeller processing technology. Firstly, the optimization method of rotating impeller technological route is studied. According to the structural characteristics of rotating impeller, combining the practical experience of craftsmen with scientific algorithm effectively, a method of optimizing the technological route of rotating impeller based on fuzzy comprehensive evaluation and genetic algorithm is put forward. Through the decision of process feature processing scheme based on fuzzy comprehensive evaluation and the optimization of process / step ranking based on genetic algorithm, a feasible and optimized process route is obtained. Secondly, the optimization method of cutting parameters of rotating impeller is studied. By analyzing the machining characteristics of rotating impeller, a multi-process oriented cutting parameter optimization model is established, and a complex algorithm is designed to solve the model according to the characteristics of the optimization problem. Finally, scientific and reasonable cutting parameters are obtained. Thirdly, some key technologies in the process of mechanical process decision are studied. Considering the prediction of process quality in production process and the effective tracing of quality problems, the relationship between processes is studied, and the frequently occurring bottleneck processes are effectively avoided in the stage of process planning. This paper studies the prediction method of bottleneck working procedure and the strategy of avoiding and dealing with it, and puts forward a method of establishing man-hour quota, which can realize the scientific and normative management of man-hour quota. Finally, based on the above method system, a prototype system of process decision support for rotating impeller machinery is designed, including the design of system business process, technical scheme, architecture, function model and database information model. The research content is applied in the process design of the impeller product of a turbocharger factory in Chongqing, and a good application effect is obtained.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TH16

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