本文選題：快鍛壓機(jī)　切入點(diǎn)：液壓缸　出處：《蘭州交通大學(xué)》2016年碩士論文

【摘要】：隨著制造業(yè)的飛速發(fā)展,鍛造產(chǎn)業(yè)得到了大力提升,市場(chǎng)對(duì)各類鍛件需求量的增加帶動(dòng)了快速鍛造壓機(jī)的發(fā)展。液壓缸作為快速鍛造壓機(jī)的關(guān)鍵部件之一,其設(shè)計(jì)方式依然以反復(fù)計(jì)算來(lái)修正結(jié)構(gòu)尺寸的傳統(tǒng)設(shè)計(jì)方法為主,但這已不能滿足企業(yè)對(duì)核心技術(shù)設(shè)計(jì)能力的要求,因此為了生產(chǎn)出性能更優(yōu)的快速鍛造壓機(jī),尋求液壓缸的現(xiàn)代設(shè)計(jì)方法顯得十分必要。本文就下拉式快鍛壓機(jī)主液壓缸缸體在使用過(guò)程中缸體出現(xiàn)裂紋,開(kāi)始滲油而無(wú)法繼續(xù)正常使用的問(wèn)題進(jìn)行研究。通過(guò)對(duì)液壓缸缸體法蘭過(guò)渡區(qū)域進(jìn)行分析,發(fā)現(xiàn)其法蘭過(guò)渡區(qū)應(yīng)力集中是影響缸體出現(xiàn)裂紋的主要原因。將下拉式快鍛壓機(jī)液壓缸缸體原本的外斜直線-圓弧法蘭過(guò)渡曲線改進(jìn)為內(nèi)凹直線圓弧過(guò)渡曲線,并按照實(shí)際工作狀態(tài),運(yùn)用有限元分析軟件對(duì)缸體法蘭過(guò)渡區(qū)仿真分析,得到采用內(nèi)凹直線圓弧過(guò)渡曲線的液壓缸應(yīng)力集中現(xiàn)象大大低于采用外斜直線-圓弧法蘭過(guò)渡曲線的液壓缸。結(jié)合現(xiàn)代計(jì)算機(jī)技術(shù)和優(yōu)化理論,利用Visual Basic語(yǔ)言對(duì)SolidWorks軟件和ANSYS軟件進(jìn)行二次開(kāi)發(fā),以下拉式快鍛壓機(jī)主液壓缸為設(shè)計(jì)原型,采用外斜直線-圓弧法蘭過(guò)渡曲線,搭建下拉式快鍛壓機(jī)主液壓缸通用模型,實(shí)現(xiàn)了SolidWorks參數(shù)化模型建立和ANSYS結(jié)構(gòu)優(yōu)化設(shè)計(jì)的集成,開(kāi)發(fā)出了簡(jiǎn)潔友好的人機(jī)對(duì)話界面,為下拉式快鍛壓機(jī)主液壓缸的參數(shù)化設(shè)計(jì)方法提供了解決方案。在滿足靜強(qiáng)度和剛度要求的前提下,按照實(shí)際的工況,設(shè)定目標(biāo)函數(shù)和約束條件,對(duì)不同噸位的下拉式快鍛壓機(jī)主液壓缸進(jìn)行優(yōu)化設(shè)計(jì)驗(yàn)證,結(jié)果顯示,該參數(shù)化優(yōu)化設(shè)計(jì)方法高效可靠,極大地方便了設(shè)計(jì)人員,提高了下拉式快鍛壓機(jī)主液壓缸的設(shè)計(jì)效率,為下拉式快鍛壓機(jī)主液壓缸的設(shè)計(jì)提供更加有效、準(zhǔn)確的設(shè)計(jì)依據(jù)。
[Abstract]:With the rapid development of manufacturing industry, the forging industry has been greatly promoted, and the increase of market demand for all kinds of forgings has led to the development of rapid forging press. The hydraulic cylinder is one of the key components of the rapid forging press. The design method is still based on the traditional design method of modifying the structure size by repeated calculation, but it can not meet the requirements of the core technology design ability of the enterprise. Therefore, in order to produce a fast forging press with better performance, It is very necessary to seek the modern design method of hydraulic cylinder. In this paper, there are cracks in the cylinder block of the main hydraulic cylinder of the pull-down fast forging press. The problem that the oil is seeped and can not continue to be used normally is studied. Through the analysis of the flange transition area of the cylinder block, It is found that the stress concentration in the flange transition zone is the main reason that affects the cracks in the cylinder block. The original external oblique straight-arc flange transition curve of the hydraulic cylinder block of the pull down fast forging press is improved to the concave linear arc transition curve. According to the actual working state, the finite element analysis software is used to simulate the flange transition zone of cylinder block. It is obtained that the stress concentration of hydraulic cylinder with concave straight arc transition curve is much lower than that with external oblique straight line arc flange transition curve, combining with modern computer technology and optimization theory, The second development of SolidWorks and ANSYS software is carried out by using Visual Basic language. Taking the main hydraulic cylinder of the pull-down fast forging press as the design prototype, the general model of the main hydraulic cylinder of the pull-down fast forging press is built by adopting the transition curve of the external oblique straight-arc flange. The integration of SolidWorks parameterized model building and ANSYS structure optimization design is realized, and a simple and friendly man-machine dialogue interface is developed. It provides a solution for the parameterized design of the main hydraulic cylinder of the pull down fast forging press. On the premise of satisfying the static strength and stiffness requirements, the objective function and constraint conditions are set according to the actual working conditions. The optimization design of the main hydraulic cylinder of the pull-down fast forging press with different tonnage is verified. The results show that the parameterized optimization design method is efficient and reliable, which greatly facilitates the designer and improves the design efficiency of the main hydraulic cylinder of the pull-down fast forging press. It provides a more effective and accurate design basis for the design of the main hydraulic cylinder of the pull-down fast forging press.
【學(xué)位授予單位】：蘭州交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TG315

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