本文選題：十二輥軋機(jī) + 輥間接觸壓力分布�。� 參考：《上海應(yīng)用技術(shù)大學(xué)》2015年碩士論文

【摘要】：隨著我國(guó)對(duì)超薄板材及帶材的需求量的日益增大,用戶對(duì)其板形質(zhì)量要求也日益增高。板形和橫向同板差是板帶材產(chǎn)品質(zhì)量的重要指標(biāo),板形優(yōu)化是軋鋼先進(jìn)技術(shù)的關(guān)鍵技術(shù)之一,為了得到高質(zhì)量的板帶材產(chǎn)品,需要軋機(jī)具有高的板形和橫向同板差控制精度。而傳統(tǒng)的二輥、四輥或六輥軋機(jī)生產(chǎn)的薄帶材板形和橫向同板差難以滿足高端產(chǎn)品的需求,而對(duì)于生產(chǎn)不銹鋼薄帶材以及寬而薄的高精度金屬板帶材都需要采用多輥軋機(jī)。為了進(jìn)一步提高多輥軋機(jī)的板形和橫向同板差控制精度,對(duì)其輥間受力和變形分析、輥型優(yōu)化設(shè)計(jì)等研究就顯得非常重要。1400mm十二輥軋機(jī)主要用于生產(chǎn)橫向厚度公差和板形要求非常高的極薄帶材和板材,為了更有效提高其控制薄板帶材的橫向厚度差和板形能力,需要了解其實(shí)際軋制過程中,軋輥之間的接觸壓力分布和軋輥的彈性變形情況,從而可以有效計(jì)算軋機(jī)實(shí)際有載輥縫和軋出軋件的橫向厚度差和板形情況。因此準(zhǔn)確描述1400mm十二輥軋機(jī)軋輥間的接觸壓力和分布規(guī)律對(duì)提高其有控制軋出軋件的橫向厚度差和板形有著極其重要的指導(dǎo)意義。但由于十二輥軋機(jī)軋輥間接觸面上的壓力分布的不均勻,使其精確的理論求解比較困難,目前還沒有有效的理論解。而三維光彈性實(shí)驗(yàn)力學(xué)分析方法與有限元計(jì)算相結(jié)合不失為是一種有效的解決途徑,這已經(jīng)在四輥、六輥HC軋機(jī)上應(yīng)用。本文根據(jù)應(yīng)力相似轉(zhuǎn)換準(zhǔn)則和實(shí)驗(yàn)應(yīng)力分析關(guān)系,建立了相關(guān)的十二輥軋機(jī)輥間接觸應(yīng)力和接觸壓力的計(jì)算式,并采用三維光彈性的應(yīng)力凍結(jié)和切片分析方法求解出軋輥模型的接觸應(yīng)力分布圖,同時(shí)依據(jù)應(yīng)力相似轉(zhuǎn)換準(zhǔn)則得出實(shí)際軋機(jī)的輥間接觸壓力等分布規(guī)律。在此基礎(chǔ)上,應(yīng)用MSC.Marc有限元分析軟件進(jìn)一步計(jì)算分析出1400mm十二輥軋機(jī)在軋制過程中各輥間接觸壓力分布規(guī)律、從而為進(jìn)一步優(yōu)化輥型等提供分析依據(jù),對(duì)1400mm十二輥軋機(jī)軋制產(chǎn)品的板形和橫向同板差優(yōu)化控制等有著重要的指導(dǎo)意義。
[Abstract]:With the increasing demand for ultra-thin sheet and strip in China, the demand for the shape quality of the strip is also increasing. Flatness and transverse difference are important indexes of product quality. Shape optimization is one of the key technologies of advanced rolling technology. In order to obtain high quality plate and strip products, it is necessary for rolling mill to have high control precision of plate shape and transverse plate difference. However, the traditional two-high, four-high or six-high rolling mill can not meet the needs of the high end products, but for the production of stainless steel thin strip and wide and thin high precision metal plate and strip, multi-roll mill is needed. In order to further improve the control accuracy of shape and transverse plate difference of multi-roll rolling mill, the stress and deformation between rollers are analyzed. The research of roll shape optimization design is very important. 1400mm 12-high rolling mill is mainly used to produce ultra-thin strip and sheet with very high transverse thickness tolerance and flatness, in order to improve its ability to control the transverse thickness difference and shape of thin sheet strip more effectively. It is necessary to understand the distribution of contact pressure between rollers and the elastic deformation of rollers during the actual rolling process, so as to effectively calculate the transverse thickness difference and flatness of the actual roll gap and rolling out of the rolling mill. Therefore, the accurate description of the contact pressure and distribution between rollers in 1400mm 12-high mill is of great significance in improving the transverse thickness difference and shape of the controlled rolling piece. However, due to the uneven pressure distribution on the contact surface between the rollers of the 12-high mill, it is difficult to solve the exact theory and there is no effective theoretical solution at present. The combination of three-dimensional photoelastic experimental mechanics analysis method and finite element calculation is an effective solution, which has been applied in four-high and six-high HC mill. Based on the criterion of similarity transformation of stress and the relation of experimental stress analysis, the formulas for calculating the contact stress and contact pressure between rollers of 12-high mill are established in this paper. The contact stress distribution diagram of roll model is solved by means of three dimensional photoelastic stress freezing and slice analysis, and the distribution law of contact pressure between rollers of practical rolling mill is obtained according to the criterion of stress similarity conversion. On this basis, MSC.Marc finite element analysis software is used to further calculate and analyze the distribution of contact pressure between rollers in the rolling process of 1400mm 12-high mill, thus providing an analytical basis for further optimization of roll profile. It has important guiding significance for the flatness and transverse plate difference optimization control of 1400mm 12-high rolling mill.
【學(xué)位授予單位】：上海應(yīng)用技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TG334.9

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