本文關(guān)鍵詞：板材粘性介質(zhì)壓力下的褶皺消除過程研究　出處：《沈陽航空航天大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 起皺 YBT 粘性介質(zhì) 褶皺消除

【摘要】：起皺是影響薄壁鈑金零件成形精度的最主要因素之一,特別是隨著薄壁鈑金零件的廣泛應(yīng)用,起皺問題更加容易產(chǎn)生,同時(shí)也受到了越來越多的重視。本文基于YBT實(shí)驗(yàn)原理及粘性介質(zhì)壓力成形特點(diǎn),以不銹鋼SUS304為板材,采用有限元分析和實(shí)驗(yàn)相結(jié)合的方法,進(jìn)行了粘性介質(zhì)壓力條件下的褶皺消除過程研究,確定了消皺過程中的影響因素及變形特點(diǎn)。首先,基于YBT原理設(shè)計(jì)了粘性介質(zhì)壓力消皺實(shí)驗(yàn)裝置,通過對(duì)褶皺形貌的評(píng)價(jià),定義了褶皺消除率的概念,并對(duì)粘性介質(zhì)壓力下褶皺消除過程的受力狀態(tài)進(jìn)行了簡要理論分析,得出了不同受力狀態(tài)下褶皺變形特點(diǎn)。其次,應(yīng)用有限元軟件ANSYS/LS-DYNA對(duì)不銹鋼SUS304粘性介質(zhì)壓力下的褶皺消除過程進(jìn)行分析,得到了粘性介質(zhì)分子量對(duì)褶皺消除過程影響規(guī)律;確定了褶皺形貌及受力狀態(tài)對(duì)褶皺消除過程影響規(guī)律。最后,采用實(shí)驗(yàn)方法對(duì)理論和有限元分析進(jìn)行了驗(yàn)證,進(jìn)一步驗(yàn)證了實(shí)驗(yàn)裝置的可行性,以及粘性介質(zhì)壓力下消皺過程的主要影響因素,實(shí)驗(yàn)結(jié)果與理論分析結(jié)果吻合較好。
[Abstract]:Wrinkle is one of the most important factors that affect the forming accuracy of thin-walled sheet metal parts. Especially with the wide application of thin-walled sheet metal parts, wrinkling is more prone to occur, and more and more attention has been paid to it. In this paper, the experimental principle and YBT viscous pressure forming based on the characteristics of SUS304 stainless steel plate, using finite element analysis method combined with experiment, the process of elimination of medium pressure under the condition of viscous folds, the impact factors in the process of eliminating wrinkle and deformation characteristics. First of all, based on the principle of YBT design of viscous medium pressure wrinkle elimination experiment device, through the evaluation of the fold morphology, defines the fold elimination rate of the concept, and the viscous pressure under the fold stress eliminating state process gives a brief theoretical analysis, the deformation characteristics under different stress state of fold. Secondly, using the finite element software ANSYS/LS-DYNA on stainless steel SUS304 viscous pressure under the fold elimination process analysis, the viscous medium molecular weight to eliminate the influence of law of fold; to determine the state of the fold fold shape and influence process of eliminating stress. Finally, the experimental method is applied to verify the theoretical and finite element analysis, which further verifies the feasibility of the experimental device and the main influencing factors of the wrinkling process under viscous medium pressure, and the experimental results are in good agreement with the theoretical analysis.
【學(xué)位授予單位】：沈陽航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TG306

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