本文選題：薄壁管 + 內(nèi)增量　； 參考：《西安理工大學(xué)》2017年碩士論文

【摘要】：在航空航天、石油化工及民用工業(yè)領(lǐng)域,存在大量不同形式的管材及不同類型的內(nèi)表面,如何實現(xiàn)這些內(nèi)表面高效、高精度成形是一個重要的工程問題。薄壁管材內(nèi)增量成形工藝是通過成形工具對薄壁管進行擠壓和碾壓迫使金屬產(chǎn)生流動,從而形成目標(biāo)制件的一種新型管材柔性成形技術(shù)。。該技術(shù)采用簡單的設(shè)備和成形工具即可實現(xiàn)對復(fù)雜薄壁管件的連續(xù)塑性成形,具有柔性好、成本低、綠色節(jié)能等優(yōu)點。本文研究薄壁管材內(nèi)增量成形力,為該技術(shù)在工程上的應(yīng)用提供指導(dǎo)。分析了薄壁管材內(nèi)增量成形原理和成形過程運動關(guān)系,給出了成形工具自轉(zhuǎn)轉(zhuǎn)速與主軸轉(zhuǎn)速之間的數(shù)學(xué)表達式。依據(jù)薄壁管材內(nèi)增量成形原理,應(yīng)用主應(yīng)力法對薄壁管材變形區(qū)的材料切取基元體,建立了基元體的應(yīng)力平衡微分方程和邊界條件,獲得了變形區(qū)材料的成形力解析表達式,為該技術(shù)成形設(shè)備的選擇和工藝參數(shù)的優(yōu)化提供理論依據(jù)。建立了紫銅薄壁管材內(nèi)增量成形有限元分析模型,應(yīng)用ABAQUS分析軟件獲得了成形過程的等效應(yīng)力、應(yīng)變和管壁厚度的分布規(guī)律,研究了徑向進給量、成形工具圓角半徑、起始成形距離和管壁厚度對成形力的影響,獲得了不同工藝參數(shù)對成形力的影響規(guī)律。建立了薄壁管材內(nèi)增量成形實驗系統(tǒng),進行了不同工藝條件下紫銅薄壁管材內(nèi)增量實驗,通過正交實驗分析了不同工藝參數(shù)對成形力的影響,建立了紫銅薄壁管材內(nèi)增量成形力的經(jīng)驗公式,驗證了理論解析和仿真分析的正確性。
[Abstract]:In Aeronautics and Astronautics, in the field of petrochemical and civil industry, there are a large number of different types of tubes and different types of inner surfaces. How to achieve high efficiency and high precision forming of these inner surfaces is an important engineering problem. The incremental forming process in thin-walled tubes is to press and crush the thin tubes to force the metal flow through the forming tool. A new flexible tube forming technology for forming the object parts. This technology can realize continuous plastic forming of complex thin-walled tubes with simple equipment and forming tools. It has the advantages of good flexibility, low cost and green energy saving. This paper studies the internal increment forming force of thin-walled tube, and provides the application of this technology in engineering. The principle of incremental forming and the relation between the forming process and the forming process are analyzed. The mathematical expression between the rotation speed of the forming tool and the spindle speed is given. According to the principle of incremental forming in the thin-walled tube, the principal stress method is used to cut the material of the deformation zone of the thin-walled tube, and the stress balance differential of the basic element body is established. The analytic expression of the forming force of the deformation zone material is obtained. The theoretical basis for the selection of the forming equipment and the optimization of the technological parameters is provided. The finite element analysis model of the incremental forming in the thin-walled copper tube is established. The equivalent stress, strain and the thickness of the tube wall are obtained by using the ABAQUS analysis software. The influence of the radial feed, the radius of the forming tool, the initial forming distance and the thickness of the tube wall on the forming force are studied. The influence of the different process parameters on the forming force is obtained. An experimental system of incremental forming in the thin-walled tube is established. The effect of different process parameters on the formability is analyzed. The empirical formula of incremental forming force in the thin-walled copper tube is established, and the correctness of theoretical analysis and simulation analysis is verified.

【學(xué)位授予單位】：西安理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TG306

【參考文獻】

相關(guān)期刊論文 前10條

1 姚梓萌;李言;楊明順;柏朗;;錐形件單點增量成形過程應(yīng)變狀態(tài)研究[J];機械科學(xué)與技術(shù);2016年12期

2 吳磊;劉彬;;旋壓技術(shù)的研究現(xiàn)狀[J];裝備制造技術(shù);2016年09期

3 郎利輝;劉康寧;張文尚;巫永坤;;板材/管材柔性介質(zhì)成形工藝新進展[J];精密成形工程;2016年05期

4 史雙喜;;基于有限元模擬的鋁合金管液壓脹形的工藝研究[J];現(xiàn)代制造工程;2016年05期

5 郭靖;詹梅;楊合;;鈦合金筒形件軋-旋成形研究進展[J];中國材料進展;2016年04期

6 孫永泰;;橡膠脹形復(fù)合模設(shè)計[J];模具制造;2016年02期

7 賈彬彬;孫廷廷;王衛(wèi)衛(wèi);;基于ABAQUS的多點成形有限元模型的建立與驗證[J];機床與液壓;2016年01期

8 李鵬陽;徐海峰;安武潤;王權(quán)岱;傅衛(wèi)平;杜彬;;板料單點漸進成形力仿真與實驗研究[J];應(yīng)用力學(xué)學(xué)報;2015年06期

9 任杰;王強;冀翠斌;劉濤;;反擠壓筒形件成形力研究[J];鍛壓技術(shù);2015年11期

10 于輝;劉帥帥;王秀琳;黃洪濤;杜鳳山;;小口徑薄壁筒形件變薄旋壓工藝及實驗[J];塑性工程學(xué)報;2015年04期

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本文編號：1840853