本文主要研究内容
作者许连超（2019）在《多点旋压曲面件成形工艺及数值模拟研究》一文中研究指出：随着工业的发展和对板形件产品要求越来越高,尤其是对复杂曲面件的需求也越来越多。传统冲压等成形工艺在曲面件生产上适用于量产化产品的制造,对于小批量、灵活度高的三维复杂曲面件成形而言并不适合。考虑生产成本及工艺的繁琐程度等因素,目前尽量采用柔性成形技术加工三维曲面件,如多点模具成形、渐进成形或旋压成形技术等,但依然存在着不小的难度。为了更好的满足生产自动化与产品个性化的需求,本文提出一种多点旋压的成形方法,并对该技术的成形设备及成形工艺进行研究。多点旋压成形工艺是结合多点模具成形、渐进成形和滚珠旋压成形等工艺特点,而设计出的一种低成本、高精度的新型曲面件加工方法。其成形原理是利用集群钢珠组成的多点模具与控制成形件形状的底模对板料形成对压模式,并驱动钢珠作无序旋转运动使板料逐渐与底模表面贴合,最终成形出三维曲面件。可更换不同型面的底模来成形出回转体曲面件或非回转体的复杂曲面件,因此多点旋压工艺在小批量、高精度的曲面件制造方面具有很高的应用与研究价值。此论文具体研究内容与结论:1.首先介绍了多点旋压工艺的成形原理,并对多点旋压成形时板材所受的应力,应变和减薄率进行了探究。分析了咬入角、钢珠尺寸等工艺参数对成形的影响。也对多点旋压模型中钢珠的轨迹及受力情况进行了理论计算,为模拟与实验提供了理论依据。2.首先对压旋同步式与异步式多点旋压模型进行三维建模,然后分别研究了两种工艺在成形过程中应力与应变的分布和变化规律,最后对两种工艺进行了对比分析,并得出压旋同步式的应力、应变较大且变化更均匀,而压旋异步式在钢珠旋转过程中由于成形件的残余应力得到充分释放,回弹量小,成形质量高。3.在同步式多点旋压模型中对不同钢珠尺寸和给进比进行成形模拟,并对模拟结果的应力、应变及厚度进行研究。结果表明,混合钢珠作用下应力、应变与厚度分布更均匀,成形质量最好。随着加载时钢珠给进比增加,起皱现象加重,成形质量降低。4.对异步式多点旋压中不同钢珠尺寸与加载圈数进行成形模拟与对模拟结果的应力应变及厚度进行研究。结果表明,3mm钢珠的成形效果最佳,且随着加载圈数增加,应力值逐渐降低,同时应力与应变分布的均匀性增加,成形质量明显提高。5.对多点旋压成形设备进行介绍,并对不同工艺参数进行试验研究,通过实验与模拟结果进行对比,得出成形件的减薄率与合模精度与模拟结果相符,且成形质量非常高,从而为三维曲面件的成形提供了一种新型、有效的成形方法。
Abstract
sui zhao gong ye de fa zhan he dui ban xing jian chan pin yao qiu yue lai yue gao ,you ji shi dui fu za qu mian jian de xu qiu ye yue lai yue duo 。chuan tong chong ya deng cheng xing gong yi zai qu mian jian sheng chan shang kuo yong yu liang chan hua chan pin de zhi zao ,dui yu xiao pi liang 、ling huo du gao de san wei fu za qu mian jian cheng xing er yan bing bu kuo ge 。kao lv sheng chan cheng ben ji gong yi de fan suo cheng du deng yin su ,mu qian jin liang cai yong rou xing cheng xing ji shu jia gong san wei qu mian jian ,ru duo dian mo ju cheng xing 、jian jin cheng xing huo xuan ya cheng xing ji shu deng ,dan yi ran cun zai zhao bu xiao de nan du 。wei le geng hao de man zu sheng chan zi dong hua yu chan pin ge xing hua de xu qiu ,ben wen di chu yi chong duo dian xuan ya de cheng xing fang fa ,bing dui gai ji shu de cheng xing she bei ji cheng xing gong yi jin hang yan jiu 。duo dian xuan ya cheng xing gong yi shi jie ge duo dian mo ju cheng xing 、jian jin cheng xing he gun zhu xuan ya cheng xing deng gong yi te dian ,er she ji chu de yi chong di cheng ben 、gao jing du de xin xing qu mian jian jia gong fang fa 。ji cheng xing yuan li shi li yong ji qun gang zhu zu cheng de duo dian mo ju yu kong zhi cheng xing jian xing zhuang de de mo dui ban liao xing cheng dui ya mo shi ,bing qu dong gang zhu zuo mo xu xuan zhuai yun dong shi ban liao zhu jian yu de mo biao mian tie ge ,zui zhong cheng xing chu san wei qu mian jian 。ke geng huan bu tong xing mian de de mo lai cheng xing chu hui zhuai ti qu mian jian huo fei hui zhuai ti de fu za qu mian jian ,yin ci duo dian xuan ya gong yi zai xiao pi liang 、gao jing du de qu mian jian zhi zao fang mian ju you hen gao de ying yong yu yan jiu jia zhi 。ci lun wen ju ti yan jiu nei rong yu jie lun :1.shou xian jie shao le duo dian xuan ya gong yi de cheng xing yuan li ,bing dui duo dian xuan ya cheng xing shi ban cai suo shou de ying li ,ying bian he jian bao lv jin hang le tan jiu 。fen xi le yao ru jiao 、gang zhu che cun deng gong yi can shu dui cheng xing de ying xiang 。ye dui duo dian xuan ya mo xing zhong gang zhu de gui ji ji shou li qing kuang jin hang le li lun ji suan ,wei mo ni yu shi yan di gong le li lun yi ju 。2.shou xian dui ya xuan tong bu shi yu yi bu shi duo dian xuan ya mo xing jin hang san wei jian mo ,ran hou fen bie yan jiu le liang chong gong yi zai cheng xing guo cheng zhong ying li yu ying bian de fen bu he bian hua gui lv ,zui hou dui liang chong gong yi jin hang le dui bi fen xi ,bing de chu ya xuan tong bu shi de ying li 、ying bian jiao da ju bian hua geng jun yun ,er ya xuan yi bu shi zai gang zhu xuan zhuai guo cheng zhong you yu cheng xing jian de can yu ying li de dao chong fen shi fang ,hui dan liang xiao ,cheng xing zhi liang gao 。3.zai tong bu shi duo dian xuan ya mo xing zhong dui bu tong gang zhu che cun he gei jin bi jin hang cheng xing mo ni ,bing dui mo ni jie guo de ying li 、ying bian ji hou du jin hang yan jiu 。jie guo biao ming ,hun ge gang zhu zuo yong xia ying li 、ying bian yu hou du fen bu geng jun yun ,cheng xing zhi liang zui hao 。sui zhao jia zai shi gang zhu gei jin bi zeng jia ,qi zhou xian xiang jia chong ,cheng xing zhi liang jiang di 。4.dui yi bu shi duo dian xuan ya zhong bu tong gang zhu che cun yu jia zai juan shu jin hang cheng xing mo ni yu dui mo ni jie guo de ying li ying bian ji hou du jin hang yan jiu 。jie guo biao ming ,3mmgang zhu de cheng xing xiao guo zui jia ,ju sui zhao jia zai juan shu zeng jia ,ying li zhi zhu jian jiang di ,tong shi ying li yu ying bian fen bu de jun yun xing zeng jia ,cheng xing zhi liang ming xian di gao 。5.dui duo dian xuan ya cheng xing she bei jin hang jie shao ,bing dui bu tong gong yi can shu jin hang shi yan yan jiu ,tong guo shi yan yu mo ni jie guo jin hang dui bi ,de chu cheng xing jian de jian bao lv yu ge mo jing du yu mo ni jie guo xiang fu ,ju cheng xing zhi liang fei chang gao ,cong er wei san wei qu mian jian de cheng xing di gong le yi chong xin xing 、you xiao de cheng xing fang fa 。
论文参考文献
论文详细介绍
论文作者分别是来自吉林大学的许连超，发表于刊物吉林大学2019-06-25论文，是一篇关于多点旋压论文,数值模拟论文,曲面件成形论文,旋压设备论文,吉林大学2019-06-25论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自吉林大学2019-06-25论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：多点旋压论文; 数值模拟论文; 曲面件成形论文; 旋压设备论文; 吉林大学2019-06-25论文;