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軋制工藝對復合板軋制翹曲的影響規律研究

時間:2019-05-11 18:07來源:畢業論文
在不同壓下率的影響下,壓下率越大,曲率越大,軋制后的復合板越彎曲,對實際生產造成不利影響;(2)在厚度比研究的部分中,厚度比越大,曲率越大,軋制后的復合板彎曲量更大

摘要:復合板結合了復合材料的優點,使之更好的適應生產需求,是應用廣泛的材料。但由于復合板本身的不對稱性,使得在其加工過程中容易產生翹曲。本文以304-Q235不銹鋼復合板作為研究對象,用Marc有限元軟件建立熱力耦合模型,針對復合板翹曲規律進行分析,研究了在不同壓下率、材料厚度比、軋件與軋輥間摩擦系數、上下工作輥輥速比下對軋件在軋制過程中的翹曲影響;并對軋制變形后厚度比進行了系統性分析。本文研究得出主要結論如下:(1)在不同壓下率的影響下,壓下率越大,曲率越大,軋制后的復合板越彎曲,對實際生產造成不利影響;(2)在厚度比研究的部分中,厚度比越大,曲率越大,軋制后的復合板彎曲量更大;(3)摩擦力對翹曲的影響較為復雜,規律也更不容易掌握,總體是隨著摩擦系數的增大,曲率降低,翹曲量變小;(4)不同輥速比對翹曲的影響最大,同等情況下不同輥速比甚至可以導致翹曲的方向不同。但是總體來說翹曲是隨著輥速比的增大而增大的;35328
畢業論文關鍵詞: 復合板;翹曲;軋制;有限元模擬
A study on the effects of composite plate’s bending for rolling technology
Abstract:The composite plate is a combination of the advantages of the composite materials, and this widely useful materials can adapt to the needs of production better. However, it is easy to bend in the rolling process due to the asymmetry of the composite plate. In this study, the object of study is 304-Q235 stainless steel composite plate, a thermal-mechanical coupling model for the rules of bending in composite plate has been built using the finite element method with Marc software, using this model analyzed the effects of different reductions, thickness ratios, friction coefficients, speed ratios for controlling the head curvature of plate in rolling, and the thickness ratio after rolling. Major results and conclusions of this study are as follows: (1)During differential reductions, increasing of reductions greatly increase the curvature, and the composite plate get more bend, it’s not useful for production. (2)During differential thickness ratio, increasing of thickness ratio greatly increases the curvature, and the composite plate get more bend. (3)The effects and rules of differential friction coefficients for the curvature of composite plate is complex, increasing of friction coefficient greatly reduces the curvature in general, and the composite plate get more straight. (4)Differential speed ratio has a large effect for the curvature of composite plate, and it can change the direct of plate’s bending. But in general increasing of speed ratio greatly increases the curvature.

源¥自%六:維;論-文'網=www.aftnzs.live


Key Words: Composite plate;Bend;Rolling;Finite element modeling
目  錄
1緒論    1
1.1 引言    1
1.2 復合板簡介    1
1.2.1 復合板的概述及分類    1
1.2.2 復合板材的應用及生產現狀    1
1.2.3 復合板的加工方法與發展    2
1.3 軋件軋制過程中的翹曲及控制方法    4
1.3.1 翹曲現象    4
1.3.2 翹曲產生的原因    4
1.4 軋制翹曲的研究歷程與進展    5
1.4.1 有限元在軋制研究中的應用    5
1.4.2 復合軋制模擬研究軟件的開發    5
1.5 課題研究目的、意義以及內容    6
1.5.1 研究的目的和意義    6
1.5.2 課題研究的內容    6
2復合板軋制有限元模型    7
2.1 幾何模型    7
2.2 網格的劃分    9
2.3 材料的設定    9 軋制工藝對復合板軋制翹曲的影響規律研究:http://www.aftnzs.live/cailiao/20190511/33222.html
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