本文關(guān)鍵詞： V形彎曲 撓曲變形 應(yīng)力-應(yīng)變 撓曲線方程　出處：《塑性工程學(xué)報》2017年06期 　論文類型：期刊論文

【摘要】：針對V形部件彎曲加工時出現(xiàn)的撓曲變形問題,基于材料力學(xué)和金屬塑性成形理論,分析了V形部件彎曲變形區(qū)內(nèi)單元體的應(yīng)力、應(yīng)變分布,并結(jié)合V形部件實際受力和變形情況,確定彎曲線撓曲變形成因、力學(xué)模型和影響因素。通過對不同長度、材質(zhì)、厚度、角度的V形部件的彎曲試驗驗證了研究結(jié)果的正確性。結(jié)果表明:V形部件彎曲線長度方向和材料厚度方向的塑性應(yīng)變符合材料力學(xué)彎曲應(yīng)力-應(yīng)變理論,且沿彎曲線長度方向上對應(yīng)點應(yīng)變均布;材料力學(xué)的均布載荷簡支梁力學(xué)模型和撓曲線方程適用于V形部件彎曲線撓曲變形;V形部件彎曲線撓曲變形的撓度值與內(nèi)應(yīng)力、V形部件長度成正比,與材料的彈性模量、V形斷面對中性層的慣矩成反比;V形彎曲變形程度大時,產(chǎn)生的內(nèi)應(yīng)力大,彎曲線撓曲變形大,反之則彎曲線撓曲變形小。最后,提出了通過提高部件慣矩、在模具上給出反變形等辦法來解決V形部件彎曲線撓曲變形問題,從而提高產(chǎn)品質(zhì)量。
[Abstract]:Based on the theory of material mechanics and metal plastic forming, the stress and strain distribution in the bending deformation zone of V-shaped parts is analyzed. Combined with the actual force and deformation of V-shaped parts, the causes of flexural deformation, mechanical model and influencing factors of bending line are determined. The bending tests of V-shaped components at different angles verify the correctness of the research results. The results show that the plastic strain in the direction of bending line length and material thickness conforms to the theory of bending stress-strain in mechanics of materials. Along the length direction of the bending line, the corresponding point strain is uniformly distributed. The mechanical model and deflection curve equation of uniform distributed load beam of material mechanics are applicable to the bending line deflection of V-shaped parts. The deflection values of V-shaped components are proportional to the internal stress and the length of V-shaped components. When the bending moment of the neutral layer is inversely proportional to the elastic modulus of the material, the internal stress and the bending deformation of the bending line are large, whereas the bending deformation of the bending line is small. Finally, it is proposed to improve the inertia moment of the components. In order to improve the product quality, the methods of reverse deformation are given to solve the problem of bending deformation of V-shaped parts.
【作者單位】： 中車長春軌道客車股份有限公司工程技術(shù)部;中車長春軌道客車股份有限公司安全部;
【基金】：中國中車集團公司科技開發(fā)計劃項目(A-4038)
【分類號】：TG306

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本文編號：1532340