發(fā)布時(shí)間：2017-12-28 14:31

  本文關(guān)鍵詞：基于ABAQUS軟件的彎曲成形工藝研究　出處：《湖北工業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 彎曲成型工藝 計(jì)算機(jī)輔助工程分析 成形仿真

【摘要】：當(dāng)下,彎曲成形工藝日漸得到了多個(gè)領(lǐng)域的應(yīng)用,其中主要用在工業(yè)生產(chǎn)中,例如汽車制造中的零部件和構(gòu)件。而現(xiàn)在關(guān)于彎曲成形工藝和模具的設(shè)計(jì)就是要為了琢磨明白如何實(shí)現(xiàn)彎曲工藝,并且在彎曲成形工藝的過(guò)程中具有哪些特點(diǎn),并根據(jù)特征設(shè)計(jì)彎曲工藝的方案,生產(chǎn)出相應(yīng)的彎曲模。彎曲工藝說(shuō)簡(jiǎn)單些就是在某種壓力下將一定形狀和尺寸的工件彎曲成所需要的零件形狀。常用到的就有沖壓工藝方法,就是采用壓力機(jī)來(lái)進(jìn)行板料模具的壓彎加工。而彎曲的手藝有多種,例如壓彎、折彎、滾彎、拉彎。用此種工藝制成的金屬制件和模具具有高精度、高性能的優(yōu)勢(shì),而且在進(jìn)行彎曲的工藝中還能提高效率,節(jié)約生產(chǎn)的成本,資源得到充分的利用。隨著新產(chǎn)品新技術(shù)投放到工業(yè)生產(chǎn)中,由于其開(kāi)發(fā)的成本較高,開(kāi)發(fā)的周期較長(zhǎng),并且能否成功還存在疑慮,所以現(xiàn)在大多數(shù)的企業(yè)為了能夠在降低生產(chǎn)成本的同時(shí)又不影響生產(chǎn)經(jīng)營(yíng),因此出現(xiàn)了仿真技術(shù)。隨著計(jì)算機(jī)技術(shù)和數(shù)值仿真技術(shù)的發(fā)展,計(jì)算機(jī)輔助工程分析(Computer Aided Engineering)這一新興的技術(shù),在成形加工和模具行業(yè)中的應(yīng)用,極大的可以幫助工程技術(shù)人員對(duì)產(chǎn)品、加工工藝、工模具、以及制造成本等進(jìn)行反復(fù)的評(píng)估、修改和優(yōu)化,直到獲得最佳的結(jié)果。成形模擬的過(guò)程是通過(guò)建立仿真對(duì)象的數(shù)學(xué)模型,采用有限元數(shù)值計(jì)算的方法來(lái)對(duì)仿真對(duì)象進(jìn)行求解,從而獲得由數(shù)字或圖形顯示的如厚度、開(kāi)裂、起皺等分布的變化結(jié)果。在分析成形仿真時(shí),首先要分析研究的對(duì)象就是成形的材料。因?yàn)椴牧系哪Ｐ秃托阅軐?duì)仿真的結(jié)果有較大的影響。而模具和壓邊圈都能夠當(dāng)成剛體來(lái)進(jìn)行處理,并且凹凸模的運(yùn)行軌跡都是固定不變的。而采用ABAQUS對(duì)彎曲成形工藝進(jìn)行模擬可以利用ABAQUS數(shù)值模擬來(lái)盡量的縮短原型實(shí)驗(yàn)所需的時(shí)長(zhǎng)和產(chǎn)品進(jìn)入市場(chǎng)的周期;設(shè)置科學(xué)合理的參數(shù)能夠有效地降低對(duì)工件的損耗,合理的設(shè)計(jì)坯料能夠減少不必要的飛邊,增加原材料的使用率。參考一些合理的想法和建議這對(duì)對(duì)模具的設(shè)計(jì)和加工十分有幫助;進(jìn)而在加工的過(guò)程中,優(yōu)化加工程序,大大的提高產(chǎn)品成型后的質(zhì)量。本文通過(guò)對(duì)45。V形件、90。V形件、U形件及二次成形件的成形及回彈的計(jì)算機(jī)仿真分析,最先開(kāi)始分析研究了仿真計(jì)算時(shí)的理論參數(shù)。把彎曲件的成形作為研究的目標(biāo),與此同時(shí)得出的參數(shù)應(yīng)當(dāng)有以下幾方面:有限元的單元尺寸和類型,壓力邊、凸凹模間隙和摩擦系數(shù)及材料性能,這些都是影響彎曲的參數(shù)。
[Abstract]:At present, the bending process has been increasingly used in many fields, which are mainly used in industrial production, such as parts and components in automobile manufacturing. Now, the design of bending technology and die is to figure out how to realize the bending process and what characteristics it has in the process of bending, and design the bending process plan according to the characteristics, and produce the corresponding bending die. The bending process is simply to bend a workpiece with a certain shape and size into the shape of the required part under a certain pressure. It is commonly used to have the stamping process method, which is to use the press to carry out the bending process of the sheet die. There are many kinds of flexure, such as bending, bending, rolling and bending. The metal parts and moulds made by this technology have the advantage of high accuracy and high performance, and in the process of bending, it can also improve efficiency, save production costs and make full use of resources. With the new technology and new products to industrial production, due to its high cost, long cycle of development and success, there are still doubts, so now most of the enterprises in order to reduce the production cost and does not affect the production and operation, so the simulation technology. With the development of computer technology and numerical simulation technology, computer aided engineering (Computer Aided Engineering) is a new technology used in forming and mold industry, which can help engineers to products, processing technology, mould, and manufacturing cost of repeated assessment, modification and optimization, to obtain the best results. The process of forming simulation is to establish the mathematical model of the simulation object, and use the finite element numerical calculation method to solve the simulation object, so as to get the results of the distribution changes such as thickness, cracking and wrinkle, which are displayed by figures or graphics. In the analysis of forming simulation, the first to analyze the object is the forming material. Because the model and performance of the material have a great influence on the results of the simulation. The die and the edge ring can be treated as rigid bodies, and the trajectory of the concave and convex dies are fixed. Using ABAQUS to simulate can cycle by using ABAQUS numerical simulation to try to shorten the length of time required for the prototype experiment and products into the market of bending process; scientific and reasonable parameters can effectively reduce the loss of the workpiece, design reasonable blank can reduce flash less unnecessary, increase the use of raw materials the rate of. Refer to some reasonable ideas and suggestions, which is very helpful for mold design and processing. In the process of machining, optimization of machining procedures will greatly improve the quality of products after molding. This article is through to 45. V shape, 90. The computer simulation analysis of forming and springback of V, U and two forming parts is first started and the theoretical parameters of simulation calculation are first analyzed and studied. Taking the forming of bending parts as the research goal, the parameters obtained at the same time should have the following aspects: element size and type of finite element, pressure side, clearance between convex and concave die, friction coefficient and material properties, all of which are parameters affecting bending.
【學(xué)位授予單位】：湖北工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TG306

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本文編號(hào)：1346406