本文選題：鍛造 + 預(yù)成形模具設(shè)計(jì)　； 參考：《山東大學(xué)》2017年碩士論文

【摘要】：鍛造作為材料塑性加工的重要方法,具有產(chǎn)品精度高、性能優(yōu)、加工效率高等優(yōu)點(diǎn),在汽車、飛機(jī)、輪船等零部件生產(chǎn)的機(jī)械制造業(yè)中有著廣泛的應(yīng)用。隨著科學(xué)技術(shù)的不斷進(jìn)步和社會(huì)經(jīng)濟(jì)的不斷發(fā)展,各機(jī)械制造業(yè)對(duì)零部件生產(chǎn)的要求越來越高,不僅要求提高生產(chǎn)質(zhì)量和生產(chǎn)效率,還要求降低生產(chǎn)成本,因此需要對(duì)鍛造過程的有關(guān)工藝參數(shù)進(jìn)行優(yōu)化。本文在分析了各種優(yōu)化設(shè)計(jì)方法和理論的基礎(chǔ)上,采用響應(yīng)曲面法對(duì)鍛造中的預(yù)鍛模形狀進(jìn)行優(yōu)化設(shè)計(jì)。根據(jù)鍛造生產(chǎn)的實(shí)際需求明確了優(yōu)化目標(biāo),即鍛件形狀符合要求且飛邊最小和鍛件的微觀組織均勻化兩個(gè)優(yōu)化目標(biāo),并分別構(gòu)建了相應(yīng)的目標(biāo)函數(shù)。以工字型鍛件為例,對(duì)預(yù)成形模具形狀進(jìn)行了設(shè)計(jì),設(shè)計(jì)出了直線、圓弧和曲線三種形狀,并以直線的角度、圓弧的半徑、曲線的拐點(diǎn)為設(shè)計(jì)變量進(jìn)行優(yōu)化。以有限元數(shù)值模擬技術(shù)為實(shí)驗(yàn)手段,對(duì)不同形狀的預(yù)成形模具進(jìn)行鍛造過程模擬,根據(jù)模擬出的實(shí)驗(yàn)數(shù)據(jù)求得目標(biāo)函數(shù)值。用曲線擬合軟件對(duì)形狀設(shè)計(jì)變量和目標(biāo)函數(shù)值進(jìn)行曲線擬合,得到相應(yīng)的曲線方程,并對(duì)曲線方程求最優(yōu)解,從而獲得最佳預(yù)成形模具形狀。以鍛件形狀為優(yōu)化目標(biāo)時(shí),曲線形預(yù)鍛模優(yōu)化后產(chǎn)生的飛邊最小;以鍛件微觀組織均勻化為優(yōu)化目標(biāo)時(shí),直線形預(yù)鍛模優(yōu)化后的微觀組織分布最均勻。本文還對(duì)鍛造成形過程進(jìn)行了多目標(biāo)優(yōu)化,建立了同時(shí)以鍛件形狀和微觀組織均勻化為優(yōu)化目標(biāo)的多目標(biāo)優(yōu)化模型,采用線性加權(quán)的方法將形狀優(yōu)化子目標(biāo)函數(shù)和微觀組織優(yōu)化子目標(biāo)函數(shù)構(gòu)成一個(gè)總目標(biāo)函數(shù)。通過三種預(yù)鍛模形狀的優(yōu)化和對(duì)比,直線形預(yù)鍛模形狀優(yōu)化后總目標(biāo)函數(shù)值最小,且終鍛件能夠充滿型腔,達(dá)到了鍛件形狀和微觀組織性能的綜合最優(yōu)。
[Abstract]:As an important method of material plastic processing, forging has many advantages such as high product precision, excellent performance and high processing efficiency. It is widely used in mechanical manufacturing of automobile, aircraft, ship and other parts. With the continuous progress of science and technology and the development of social economy, the requirements of the mechanical manufacturing industry for the production of components are becoming higher and higher, not only to improve the quality and efficiency of production, but also to reduce the cost of production. Therefore, it is necessary to optimize the process parameters of the forging process. Based on the analysis of various optimization design methods and theories, this paper uses the response surface method to optimize the shape of preforging die in forging. According to the actual demand of forging production, the optimization goal is defined, that is, the forging shape meets the requirements and the minimum flange and the microstructure of the forging are homogenized, and the corresponding objective functions are constructed respectively. Taking I-shaped forgings as an example, the shape of preformed die is designed. Three shapes, namely, straight line, arc and curve, are designed and optimized with the angle of straight line, radius of arc and inflection point of curve as design variables. The forging process of preformed die with different shapes was simulated by finite element numerical simulation technique. The objective function value was obtained according to the simulated experimental data. The curve fitting software is used to fit the shape design variable and the objective function value, and the corresponding curve equation is obtained, and the optimal solution to the curve equation is obtained, so as to obtain the best shape of the preforming die. When the shape of forgings is taken as the optimization object, the minimum flange is produced after the curved preforging die is optimized, and the microstructure distribution of the optimized linear preforging die is the most uniform when the microstructure of the forging is homogenized as the optimization objective. In this paper, multi-objective optimization of forging forming process is also carried out, and a multi-objective optimization model is established in which the shape and microstructure of forgings are homogenized as the optimization objectives at the same time. The shape optimization subobjective function and the microstructure optimization subobjective function are used to form a total objective function. Through the optimization and comparison of three kinds of preforging die shape, the total objective function value of linear preforging die shape optimization is minimum, and the final forging can be filled with cavity, which achieves the comprehensive optimum of forgings shape and microstructure and properties.
【學(xué)位授予單位】：山東大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TG315.2

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 趙國(guó)群,賈玉璽,王廣春,趙振鐸;基于有限元逆向模擬技術(shù)的預(yù)成形模具設(shè)計(jì)[J];機(jī)械工程學(xué)報(bào);2000年02期

2 趙新海,趙國(guó)群,王廣春;金屬體積成形預(yù)成形設(shè)計(jì)的現(xiàn)狀及發(fā)展[J];塑性工程學(xué)報(bào);2000年03期

3 沈曉輝,安濤,閆軍,章靜,李翔,張磊;840車輪預(yù)成形過程的有限元分析[J];鋼鐵研究學(xué)報(bào);2005年01期

4 亢戰(zhàn);趙紅兵;顧元憲;;金屬預(yù)成形優(yōu)化設(shè)計(jì)及凝聚函數(shù)方法[J];工程力學(xué);2006年10期

5 汪磊;王以利;金超;宋連斌;;叉頭一模兩件預(yù)成形過程的數(shù)值模擬分析[J];浙江科技學(xué)院學(xué)報(bào);2009年03期

6 羅仁平,彭穎紅,張永清;基于數(shù)值模擬的鍛造預(yù)成形優(yōu)化設(shè)計(jì)系統(tǒng)集成[J];機(jī)械科學(xué)與技術(shù);1999年05期

7 高秀倫,席耀忠;生料預(yù)成形技術(shù)簡(jiǎn)介[J];水泥工程;1999年01期

8 邵勇;陸彬;任發(fā)才;陳軍;;基于變形均勻的葉片鍛造預(yù)成形拓?fù)鋬?yōu)化設(shè)計(jì)[J];上海交通大學(xué)學(xué)報(bào);2014年03期

9 許章澤,李勝祗,閻軍,孫中建,李小宇,安濤,李翔;火車車輪預(yù)成形過程的有限元分析[J];重型機(jī)械;2002年06期

10 趙新海,趙國(guó)群,王廣春,王同海;鍛造預(yù)成形多目標(biāo)優(yōu)化設(shè)計(jì)的研究[J];機(jī)械工程學(xué)報(bào);2002年04期

相關(guān)會(huì)議論文 前5條

1 亢戰(zhàn);;考慮不確定性的預(yù)成形過程穩(wěn)健性優(yōu)化設(shè)計(jì)[A];中國(guó)力學(xué)學(xué)會(huì)學(xué)術(shù)大會(huì)'2005論文摘要集（下）[C];2005年

2 李茂盛;;剪旋前曲母線預(yù)成形型面計(jì)算方法的探討[A];第八屆全國(guó)塑性加工學(xué)術(shù)年會(huì)論文集[C];2002年

3 李茂盛;;剪旋前曲母線預(yù)成形型面計(jì)算方法的探討[A];制造業(yè)與未來中國(guó)——2002年中國(guó)機(jī)械工程學(xué)會(huì)年會(huì)論文集[C];2002年

4 趙國(guó)群;馬新武;王廣春;;基于靈敏度分析的預(yù)成形優(yōu)化設(shè)計(jì)系統(tǒng)的開發(fā)研究[A];制造業(yè)與未來中國(guó)——2002年中國(guó)機(jī)械工程學(xué)會(huì)年會(huì)論文集[C];2002年

5 沈曉輝;閻軍;章靜;江波;;火車輪預(yù)成形過程的組織演變模擬[A];2009熱軋鋼材組織性能預(yù)報(bào)研究與應(yīng)用學(xué)術(shù)研討會(huì)文集[C];2009年

相關(guān)博士學(xué)位論文 前2條

1 邵勇;復(fù)雜形狀葉片精密成形的預(yù)鍛形狀拓?fù)鋬?yōu)化算法研究[D];上海交通大學(xué);2014年

2 王凱峰;時(shí)效硬化鋁合金板材預(yù)成形退火加工工藝研究[D];天津大學(xué);2014年

相關(guān)碩士學(xué)位論文 前10條

1 劉目娟;基于類等勢(shì)場(chǎng)法和響應(yīng)面分析的鍛造預(yù)成形優(yōu)化設(shè)計(jì)[D];山東大學(xué);2015年

2 張子堯;基于Kriging模型的球鉸芯軸預(yù)成形多目標(biāo)優(yōu)化[D];江蘇大學(xué);2016年

3 李松蒲;基于電場(chǎng)法的二道次漸進(jìn)成形預(yù)成形型面設(shè)計(jì)和研究[D];重慶大學(xué);2016年

4 張子偉;基于響應(yīng)曲面法的預(yù)成形模具優(yōu)化設(shè)計(jì)研究[D];山東大學(xué);2017年

5 宋光鑫;火車輪預(yù)成形工藝分析及數(shù)值模擬[D];太原科技大學(xué);2008年

6 王永聰;基于預(yù)成形/形狀設(shè)計(jì)的模具等徑磨損優(yōu)化研究[D];山東大學(xué);2012年

7 李玲;基于預(yù)成形的鍛造過程微觀組織模擬與優(yōu)化設(shè)計(jì)方法及應(yīng)用[D];山東大學(xué);2005年

8 曹品金;基于響應(yīng)面法的鍛造預(yù)成形優(yōu)化設(shè)計(jì)方法研究[D];山東大學(xué);2013年

9 鄭仰利;火車車輪成形工藝研究及仿真[D];長(zhǎng)春理工大學(xué);2013年

10 白雪;基于類等勢(shì)場(chǎng)法的鍛造預(yù)成形優(yōu)化設(shè)計(jì)研究[D];山東大學(xué);2013年

，

本文編號(hào)：1918759