本文選題：三輥矯圓 + 薄壁管　； 參考：《機械工程學(xué)報》2017年14期

【摘要】：為揭示對稱式三輥矯圓原理,優(yōu)化矯圓策略,對三輥矯圓工藝進行理論解析和試驗研究�；谄矫媲杭儚澢鷱棌�(fù)方程,采用雙線性簡單隨動強化模型,通過數(shù)學(xué)歸納法建立往復(fù)彎曲彈復(fù)曲率方程和彈復(fù)曲率統(tǒng)一方程。理論解析結(jié)果表明:管坯周向不同初始曲率的管壁微段在矯圓加載過程中經(jīng)歷多次往復(fù)彎曲湮滅了初始曲率的差異,最終使各管壁微段彈復(fù)后曲率統(tǒng)一。通過幾何關(guān)系,建立上輥壓下量、彎曲曲率半徑和彈區(qū)比的定量關(guān)系,進而可實現(xiàn)上輥壓下量的預(yù)測。三輥矯圓試驗驗證了對稱式三輥矯圓原理。試驗結(jié)果表明:隨著彈區(qū)比減小,殘余橢圓度逐漸減小,當彈區(qū)比接近40%時,殘余橢圓度接近0.3%,遠小于美國石油管道協(xié)會API 5L的規(guī)定。同時驗證了在小變形范圍內(nèi),殘余橢圓度與初始橢圓度關(guān)系不大。
[Abstract]:In order to reveal the principle of symmetrical three-roll correction and optimize the strategy of correction, the theoretical analysis and experimental study of three-roll correction were carried out. Based on the compound equation of pure bending projectile of plane curved beam, the equations of complex curvature of reciprocating bending elastic and the unified equation of complex curvature of reciprocating bending are established by means of mathematical induction. The theoretical analysis results show that the micro-segments of tube wall with different initial curvature in circumferential direction undergo repeated reciprocating bending and annihilation in the process of orthopedic loading, resulting in the unification of the initial curvature of each micro-segment of the tube wall. Based on the geometric relationship, the quantitative relationships among the roll reduction, the curvature radius of the bending and the ratio of the projectile zone are established, and the prediction of the upper roll reduction can be realized. The three-roll straightening test verifies the symmetrical three-roll correction principle. The experimental results show that the residual ellipticity decreases with the decrease of the projectile area ratio. When the projectile area ratio is close to 40, the residual ellipticity is close to 0.3, which is much smaller than the API 5L of the American Petroleum Pipeline Association. At the same time, it is verified that in the range of small deformation, the relation between the residual ellipticity and the initial ellipticity is not significant.
【作者單位】： 先進鍛壓成形技術(shù)與科學(xué)教育部重點實驗室(燕山大學(xué));河北工業(yè)大學(xué)廊坊分�；A(chǔ)課部;南通超力卷板機制造有限公司;
【基金】：國家自然科學(xué)基金(51575473,51175452) 河北省鋼鐵聯(lián)合研究基金(E2016203209)資助項目
【分類號】：TG306

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