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角型材轉(zhuǎn)臺式拉彎回彈的解析分析

時間:2023-05-06 17:17:26 航空航天論文 我要投稿
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角型材轉(zhuǎn)臺式拉彎回彈的解析分析

摘要:從理論上對角型材的拉彎回彈進行研究,基于角型材截面應(yīng)力、應(yīng)變分布算法建立拉彎解析模型,推導(dǎo)零件卸載后回彈角的計算公式,分析討論預(yù)拉力和補拉力對回彈的影響規(guī)律.結(jié)果表明:拉彎零件的回彈隨著預(yù)拉力或補拉力的增大而減小.與試驗結(jié)果的對比表明,建立的解析模型能夠較好地預(yù)測角型材拉彎零件的回彈.Abstract:The theoretical analysis of springback in rotary stretch bending process of L-section extrusion was studied.The models for characterizing the springback angle after unloading were established based on the stress and strain distributions in the cross-section of the part.With the proposed model,analysis of the effect of pre-stretch force and post-stretch force on springback angle shows that springback decreases as the pre-stretch force or post-stretch force increases.Comparative study with experiments clearly demonstrates that the prediction of springback can resort to the current model without the loss of accuracy. 作者: 于成龍李小強 Author: YU Cheng-long  LI Xiao-qiang 作者單位: 北京航空航天大學(xué)機械工程及自動化學(xué)院,北京,100191 期 刊: 中國有色金屬學(xué)報(英文版)   ISTICEISCI Journal: Transactions of Nonferrous Metals Society of China 年,卷(期): 2011, 21(12) 分類號: V261 關(guān)鍵詞: 回彈    轉(zhuǎn)臺式拉彎    解析分析    Keywords: springback    rotary stretch bending    theoretical analysis    機標(biāo)分類號: V26 TS7 機標(biāo)關(guān)鍵詞: 角型材    轉(zhuǎn)臺式拉彎    回彈角    解析分析    預(yù)拉力    解析模型    analysis    零件    model    decreases    影響規(guī)律    型材拉彎    試驗結(jié)果    截面應(yīng)力    計算公式    分析討論    分布算法    對比表    stress    study 基金項目: the China Postdoctoral Science Foundation,the National Natural Science Foundation of China

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