本文選題：彎曲校正 + 等效建模��； 參考：《中國礦業(yè)大學(xué)》2017年碩士論文

【摘要】：隨著資源節(jié)約型、環(huán)境友好型社會(huì)的發(fā)展,再制造技術(shù)受到廣泛關(guān)注。目前的再制造主要針對(duì)零件的表面修復(fù)。而針對(duì)變形零件的自動(dòng)校正的研究較少。已有的校正理論的研究主要集中在少數(shù)幾種具有規(guī)則截面的零件,這種方法不具有通用性。為此,本文針對(duì)梁形彎曲變形零件,通過等效建模,將復(fù)雜化的彎曲變形零件截面參數(shù)簡單化,將多樣化的校直模型統(tǒng)一化,為實(shí)現(xiàn)零件的自動(dòng)化校正提供了理論參考。論文提出對(duì)稱梁形零件的等效建模方法,以工型截面梁為研究對(duì)象,建立工型截面梁的等效矩形截面梁;分別建立工型截面梁及其等效梁的校正理論模型,得到各自的校正反彎曲率方程;進(jìn)一步得到校正反彎行程,對(duì)比在相同初始彎曲程度下,工型梁及其等效梁的校正參數(shù),驗(yàn)證該等效建模方法的可行性;最后,通過有限元仿真及實(shí)驗(yàn)進(jìn)一步對(duì)等效建模方法進(jìn)行驗(yàn)證。論文針對(duì)非對(duì)稱梁形零件,以U型截面梁為研究對(duì)象,提出矩形度概念;基于矩形度,對(duì)U型截面梁進(jìn)行等效建模,得到U型截面梁的等效矩形截面梁;基于矩形度,分別建立不同截面矩形度下的U型截面梁及其等效梁的校正模型,得到各自的校正反彎曲率方程,并進(jìn)一步得到校正反彎行程;對(duì)比在相同初始彎曲程度下U型截面梁及其等效梁的校正參數(shù),驗(yàn)證非對(duì)稱梁形零件等效建模方法的可行性;最后通過有限元仿真和實(shí)驗(yàn)對(duì)非對(duì)稱梁形零件的等效建模方法進(jìn)行驗(yàn)證。論文提出變截面梁形零件的等效建模方法,以開槽變截面梁為研究對(duì)象,建立開槽變截面梁的等效矩形變截面梁;建立等效梁的載荷-撓度、載荷-殘余撓度理論模型,并運(yùn)用有限差分進(jìn)行求解;分別對(duì)開槽變截面梁及其等效梁進(jìn)行有限元仿真,通過對(duì)比等效梁有限差分法與有限元法的載荷-撓度以及載荷-殘余撓度曲線,對(duì)建立的理論模型進(jìn)行驗(yàn)證;通過對(duì)比有限元仿真中開槽變截面梁及其等效梁相同下壓行程下的殘余撓度,驗(yàn)證變截面梁形零件等效建模方法的可行性;最后通過實(shí)驗(yàn)對(duì)仿真結(jié)果進(jìn)行驗(yàn)證。論文給出實(shí)驗(yàn)裝置的結(jié)構(gòu)設(shè)計(jì)方案;進(jìn)行數(shù)據(jù)采集系統(tǒng)設(shè)計(jì),對(duì)下壓載荷及零件的彎曲程度進(jìn)行實(shí)時(shí)監(jiān)控;制作實(shí)驗(yàn)裝置,分別對(duì)工型梁及其等效梁、U型梁及其等效梁、變截面梁及其等效梁進(jìn)行三點(diǎn)壓彎實(shí)驗(yàn),驗(yàn)證等效建模方法的可行性。
[Abstract]:With the development of resource-saving and environment-friendly society, re-manufacturing technology has been paid more and more attention. Current re-manufacturing is mainly aimed at surface repair of parts. However, there are few researches on automatic correction of deformed parts. The existing correction theory is mainly focused on a few kinds of parts with regular cross section, this method is not universal. For this reason, through equivalent modeling, this paper simplifies the cross-section parameters of complicated bending deformation parts and unifies the various straightening models, which provides a theoretical reference for the automatic correction of the parts. In this paper, an equivalent modeling method for symmetrical beam parts is proposed. The equivalent rectangular section beam of the I-section beam is established, and the correction theory model of the I-section beam and its equivalent beam is established respectively, taking the I-section beam as the research object, and the equivalent rectangular cross-section beam of the I-section beam as the research object. The correct reverse bending stroke is obtained, and the correction parameters of the I-beam and its equivalent beam under the same initial bending degree are compared to verify the feasibility of the equivalent modeling method. The equivalent modeling method is further verified by finite element simulation and experiment. Taking U section beam as the research object, this paper puts forward the concept of rectangle degree, based on the rectangle degree, carries on the equivalent modeling to the U section beam, obtains the equivalent rectangular section beam of the U section beam, based on the rectangle degree, The correction models of U-shaped cross-section beams and their equivalent beams with different cross-section rectangular degrees are established, and their corrected inverse bending ratio equations are obtained, and the corrected reverse bending stroke is further obtained. The calibration parameters of U-section beam and its equivalent beam under the same initial bending degree are compared to verify the feasibility of the equivalent modeling method for asymmetric beam. Finally, the equivalent modeling method of asymmetric beam is verified by finite element simulation and experiment. In this paper, an equivalent modeling method for beam parts with variable cross-section is proposed. Taking the slotted beam with variable section as the research object, the equivalent rectangular variable section beam of the slotted variable section beam is established, and the load-deflection, load-residual deflection theory model of the equivalent beam is established. The finite element simulation of the slotted variable section beam and its equivalent beam is carried out, and the load-deflection curves and load-residual deflection curves of the finite difference method and the finite element method are compared. By comparing the residual deflection of slotted variable section beam and its equivalent beam under the same compression stroke in finite element simulation, the feasibility of equivalent modeling method of variable section beam is verified. Finally, the simulation results are verified by experiments. The structure design scheme of the experimental device is given, the data acquisition system is designed to monitor the pressure load and the bending degree of the parts in real time, and the experimental device is made, respectively, for the workpiece beam and its equivalent beam and its equivalent beam. The three point bending experiment of variable section beam and its equivalent beam is carried out to verify the feasibility of the equivalent modeling method.
【學(xué)位授予單位】：中國礦業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TH16

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 盧召紅;閆亮;張文福;于慧敏;張光明;;不銹鋼-混凝土-鋼雙臂管等效截面計(jì)算[J];低溫建筑技術(shù);2015年11期

2 莫立新;徐峰;鄭紹文;;基于等效截面的復(fù)合材料板格彎曲正應(yīng)力計(jì)算方法[J];中國艦船研究;2014年06期

3 嚴(yán)國平;;基于有限差分法的工作輥彎輥撓曲計(jì)算[J];冶金設(shè)備;2014年04期

4 田來社;;淺談?dòng)邢薏罘址ㄔ谇罅鹤冃螘r(shí)的應(yīng)用[J];教育教學(xué)論壇;2014年10期

5 徐濱士;董世運(yùn);史佩京;;中國特色的再制造零件質(zhì)量保證技術(shù)體系現(xiàn)狀及展望[J];機(jī)械工程學(xué)報(bào);2013年20期

6 單云龍;田磊;胡志強(qiáng);;機(jī)械零件失效模式研究[J];輕工科技;2013年07期

7 李瑩;周睿;;校正力對(duì)V形件彎曲回彈的影響[J];鍛壓裝備與制造技術(shù);2012年06期

8 ;廢舊機(jī)電產(chǎn)品含豐富的可再利用資源[J];中國資源綜合利用;2012年07期

9 余忠華;周磊;;電梯導(dǎo)軌立式壓力矯直關(guān)鍵技術(shù)研究[J];浙江大學(xué)學(xué)報(bào)(工學(xué)版);2010年08期

10 劉燕;陳永雄;梁秀兵;白金元;程江波;;基于高速電弧噴涂技術(shù)的耐磨涂層的研究進(jìn)展[J];材料導(dǎo)報(bào);2010年S1期

相關(guān)博士學(xué)位論文 前4條

1 展培培;大型管件管端過彎矯圓工藝及智能化控制技術(shù)研究[D];燕山大學(xué);2013年

2 周磊;電梯導(dǎo)軌彎曲變形校直理論模型、仿真與實(shí)驗(yàn)研究[D];浙江大學(xué);2010年

3 孫杰;航空整體結(jié)構(gòu)件數(shù)控加工變形校正理論和方法研究[D];浙江大學(xué);2003年

4 翟華;軸類零件校直工藝?yán)碚撗芯縖D];合肥工業(yè)大學(xué);2003年

相關(guān)碩士學(xué)位論文 前4條

1 滿佳;發(fā)動(dòng)機(jī)連桿自動(dòng)化納米復(fù)合電刷鍍技術(shù)及裝備[D];山東大學(xué);2015年

2 熊忠琪;針對(duì)腐蝕和磨損的激光堆焊修復(fù)技術(shù)實(shí)驗(yàn)研究[D];上海交通大學(xué);2009年

3 劉立璽;軸類零件校直壓力模型的研究[D];吉林大學(xué);2006年

4 孫寬;激光熔覆修復(fù)技術(shù)的研究[D];河北工業(yè)大學(xué);2006年

，

本文編號(hào)：1832186