【摘要】：變截面輥彎成型技術(shù)是一種節(jié)能、順應(yīng)輕量化發(fā)展的新型塑性成形工藝。但在雙相鋼板材的成形實(shí)驗(yàn)中,成形件變截面區(qū)底面腹板因殘余應(yīng)力易產(chǎn)生拱起、邊波等缺陷,影響成形精度。本課題針對定模動輥生產(chǎn)線變高度構(gòu)件制造問題,以減小變形抗力、提高成形精度、優(yōu)化工藝裝備為目標(biāo),探究淬火延性鋼材料的力學(xué)性能、屈服行為和成型仿真,以獲得適用于輥彎成型的新高強(qiáng)鋼品種。本文依據(jù)研究目標(biāo),首先針對淬火延性鋼QP980材料設(shè)計(jì)了 30次拉伸實(shí)驗(yàn)。通過不同軋制方向的單向拉伸實(shí)驗(yàn)獲得了該材料的基本力學(xué)性能和真實(shí)應(yīng)力應(yīng)變關(guān)系;通過不同軋制方向不同加載比例的雙向拉伸實(shí)驗(yàn),得到了雙向拉伸下的真實(shí)應(yīng)力應(yīng)變關(guān)系,進(jìn)而計(jì)算出QP980材料的塑性功等高線。本文比較 Mises、Hill'48、Hill'93、Hosford、Gotoh 和 Barlat89 六種常用屈服準(zhǔn)則與QP980高強(qiáng)鋼屈服行為的匹配程度,得出匹配度最差的是Hosford準(zhǔn)則與Barlat89準(zhǔn)則,最合適的為Hill'48準(zhǔn)則。同時(shí),針對QP980材料對Hill'48準(zhǔn)則進(jìn)行了優(yōu)化,使之能更好的描述該材料的屈服行為。最后,建立變高度輥彎成型生產(chǎn)線變截面部分的簡化模型,同時(shí)在材料屬性里設(shè)置Hill'48準(zhǔn)則的相關(guān)參數(shù)進(jìn)行有限元仿真,模擬QP980板料通過變高度輥彎成型生產(chǎn)線的成形狀況。仿真結(jié)果發(fā)現(xiàn)板材成形效果良好,沒有發(fā)現(xiàn)邊波、起皺等成形問題。同時(shí)在仿真結(jié)果中提取數(shù)據(jù),分析了等效應(yīng)力云圖、等效塑性應(yīng)變云圖、軋輥反作用力矩、軋輥反作用力、回彈情況,除回彈角度較大外,均能滿足變高度輥彎成型生產(chǎn)線的設(shè)計(jì)要求。實(shí)驗(yàn)、理論計(jì)算和仿真結(jié)果說明QP980高強(qiáng)鋼在該生產(chǎn)線上成型具有可行性,可以進(jìn)行實(shí)際成型實(shí)驗(yàn)。
[Abstract]:Variable section roll forming is a new type of plastic forming technology, which is energy saving and follows the development of light weight. However, in the forming experiment of duplex steel sheet, the forming accuracy is affected by the defects such as arch and edge wave in the bottom web of the variable cross section zone of the forming part because of the residual stress. In order to reduce the deformation resistance, improve the forming precision and optimize the process equipment, this subject aims at the manufacture of variable height components in the constant die moving roll production line, and probes into the mechanical properties, yield behavior and forming simulation of quenched ductile steel materials. In order to obtain new high strength steel varieties suitable for roll forming. In this paper, 30 tensile tests were designed for quenched ductile steel QP980 materials according to the research objectives. The basic mechanical properties and the true stress-strain relationship of the material were obtained by uniaxial tensile experiments with different rolling directions, and the biaxial tensile tests with different rolling directions and different loading ratios were carried out. The true stress-strain relationship under biaxial tension is obtained and the plastic work contours of QP980 materials are calculated. In this paper, the matching degree of six common yield criteria between Mises,Hill'48,Hill'93,Hosford,Gotoh and Barlat89 and yield behavior of QP980 high strength steel is compared. It is concluded that the worst matching degree is Hosford criterion and Barlat89 criterion, and the most suitable one is Hill'48 criterion. At the same time, the Hill'48 criterion is optimized for the QP980 material to describe the yield behavior of the material better. Finally, the simplified model of the variable section part of the variable height roll bending production line is established. At the same time, the relevant parameters of the Hill'48 criterion are set in the material attribute to simulate the forming condition of the QP980 sheet metal through the variable height roll bending production line. Simulation results show that sheet metal forming effect is good, no side wave, wrinkle and other forming problems. At the same time, the data are extracted from the simulation results, and the equivalent stress cloud diagram, the equivalent plastic strain cloud diagram, the roll reaction moment, the roll reaction force and the springback are analyzed, except for the large springback angle. All can meet the design requirements of the variable height roll bending production line. Experimental, theoretical and simulation results show that QP980 high strength steel forming in this production line is feasible and can be used in actual forming experiment.
【學(xué)位授予單位】：北方工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TG142.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 閆軍;李強(qiáng);周志霞;;單側(cè)變截面輥彎成形系統(tǒng)的運(yùn)動分析[J];高技術(shù)通訊;2016年06期

2 黃昔光;王健;李端玲;管延智;;變截面輥彎成形裝備運(yùn)動特性研究[J];西安交通大學(xué)學(xué)報(bào);2016年02期

3 閻昱;賈方輝;張漢成;;基于不同單元類型的DP980鋼輥彎成形仿真與回彈分析[J];塑性工程學(xué)報(bào);2015年03期

4 ;濟(jì)南鑄鍛所與德國DATA M公司簽署汽車大梁輥彎成型技術(shù)合作協(xié)議[J];鍛壓裝備與制造技術(shù);2014年06期

5 鄭德兵;柳一凡;吳純明;余歡慶;;汽車用第三代高強(qiáng)度鋼QP980沖壓成形性研究[J];中國機(jī)械工程;2014年20期

6 陳正陽;王海波;閻昱;賈方輝;;基于ABAQUS等效簡化模型的輥彎成形機(jī)設(shè)計(jì)分析[J];鍛壓技術(shù);2014年07期

7 管延智;李強(qiáng);王英爽;賈方輝;陳正陽;;基于缺陷控制的DP980高強(qiáng)鋼三維變截面輥彎成形有限元仿真[J];鍛壓技術(shù);2014年04期

8 蘇洪英;劉菁;呂丹;陳洪凱;孫紹廣;王超逸;;金屬材料塑性應(yīng)變比r值的測試[J];理化檢驗(yàn)(物理分冊);2013年12期

9 王海波;萬敏;閻昱;吳向東;;參數(shù)求解方法對屈服準(zhǔn)則的各向異性行為描述能力的影響[J];機(jī)械工程學(xué)報(bào);2013年24期

10 陳素平;田坤;;高強(qiáng)鋼熱成形技術(shù)應(yīng)用分析[J];現(xiàn)代零部件;2013年08期

相關(guān)碩士學(xué)位論文 前10條

1 吳清遠(yuǎn);輥彎成形斷裂機(jī)理與有限元模擬[D];北方工業(yè)大學(xué);2016年

2 陳靜;基于有限元分析的變高度定模動輥輥彎成形工藝研究[D];北方工業(yè)大學(xué);2016年

3 王時(shí);激光輔助定模動輥輥彎成型有限元分析[D];北方工業(yè)大學(xué);2015年

4 高一鑫;定模動輥?zhàn)兘孛孑亸澇尚芜^程有限元分析[D];北方工業(yè)大學(xué);2015年

5 黃愛芳;定模動輥?zhàn)兘孛孑亸澇尚螜C(jī)的動態(tài)智能優(yōu)化方法[D];北方工業(yè)大學(xué);2015年

6 賈方輝;先進(jìn)高強(qiáng)度鋼輥彎成形斷裂機(jī)理研究及缺陷預(yù)測[D];北方工業(yè)大學(xué);2015年

7 石碧瑩;定模動輥?zhàn)兘孛孑亸澇尚紊a(chǎn)線控制系統(tǒng)研究[D];北方工業(yè)大學(xué);2015年

8 翟京;雙向拉壓力學(xué)試驗(yàn)機(jī)的裝備開發(fā)與實(shí)驗(yàn)研究[D];北方工業(yè)大學(xué);2014年

9 陽振峰;高強(qiáng)鋼三維輥彎成形生產(chǎn)線樣機(jī)機(jī)械系統(tǒng)動力學(xué)分析[D];北方工業(yè)大學(xué);2013年

10 丁新橋;柔性輥彎成型仿真研究[D];北方工業(yè)大學(xué);2010年

，

本文編號：2285745