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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(jìn)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(qiáng) Author: YU Cheng-long LI Xiao-qiang 作者單位: 北京航空航天大學(xué)機(jī)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(jī)標(biāo)分類號: V26 TS7 機(jī)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【角型材轉(zhuǎn)臺式拉彎回彈的解析分析】相關(guān)文章:
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