本文選題：扭曲型材 + 火工成形��； 參考：《大連理工大學(xué)》2015年碩士論文

【摘要】：船用扭曲型材在造船過程中有著較大的需求量。傳統(tǒng)型材加工成形多數(shù)局限于通過冷彎?rùn)C(jī)器進(jìn)行型材長(zhǎng)度方向上的彎曲。這樣的型材可以滿足多數(shù)的工程需要,但是涉及到扭曲型材的成形,傳統(tǒng)冷彎加工則暴露了其局限性�；鸸ぜ庸さ淖詣�(dòng)化程度非常差,一般是通過人工依據(jù)經(jīng)驗(yàn)進(jìn)行加工,加工效率較低,型材成形精確度也較差。由此,本文進(jìn)行了扭曲型材火工成形的工藝參數(shù)研究。探索扭曲型材火工成形的規(guī)律,推進(jìn)型材自動(dòng)化加工的研究進(jìn)程。本文通過有限元分析軟件對(duì)扭曲型材火工成形過程進(jìn)行了數(shù)值模擬,建立了一個(gè)非線性瞬態(tài)間接耦合的熱-結(jié)構(gòu)分析的三維模型。通過模擬實(shí)驗(yàn),總結(jié)了扭曲型材火工成形中的影響溫度場(chǎng)的幾個(gè)因素,包括：型材厚度、燃?xì)饬髁俊嵩匆苿?dòng)速度、型材材料、冷卻方式等,其中,型材厚度、燃?xì)饬髁俊嵩匆苿?dòng)速度影響最大。從兩方面分析了扭曲型材火工成形中影響變形場(chǎng)的幾個(gè)關(guān)鍵工藝參數(shù),第一個(gè)方面是從影響局部變形場(chǎng)的參數(shù)進(jìn)行研究,主要包括：型材尺寸、燃?xì)饬髁�、熱源移�?dòng)速度、約束的施加這幾點(diǎn)；第二個(gè)方面是從影響整體變形場(chǎng)的因素進(jìn)行研究,主要包括：熱源施加順序和受熱面兩方面因素。并且,對(duì)影響縱向線變形的幾個(gè)因素進(jìn)行了簡(jiǎn)單探討。最后,本文對(duì)扭曲型材火工成形的工藝參數(shù)和成形角度之間的關(guān)系進(jìn)行了分析,并提出了以體功率為自變量的數(shù)學(xué)模型,初步探索了扭曲型材火工成形的工藝參數(shù)設(shè)置。
[Abstract]:There is a large demand for warped sections in shipbuilding. Traditional profile forming is limited to bending of profile length by cold bending machine. This kind of profile can meet most engineering needs, but it involves the forming of twisted profile, which is exposed by traditional cold bending. The degree of automation of explosive processing is very poor, which is usually processed by manual experience. The processing efficiency is low, and the forming accuracy of profile is also poor. Therefore, the technical parameters of the twisting profile are studied in this paper. To explore the law of the twisting profile pyroforming and to promote the research process of profile automatic processing. In this paper, the numerical simulation of the pyroforming process of twisted profile is carried out by means of finite element analysis software, and a three-dimensional model of nonlinear transient indirect coupling thermo-structural analysis is established. Through the simulation experiments, several factors affecting the temperature field are summarized, including: profile thickness, gas flow rate, heat source moving speed, profile material, cooling mode, etc., among which, profile thickness, gas flow rate, etc. The moving speed of heat source is the most important. In this paper, several key technological parameters which affect the deformation field are analyzed from two aspects. The first aspect is the study of the parameters that affect the local deformation field, including: profile size, gas flow rate, heat source moving speed. The second aspect is to study the factors that affect the whole deformation field, including the heat source application sequence and the heating surface. Furthermore, several factors affecting the longitudinal line deformation are discussed briefly. Finally, the relationship between the process parameters and the forming angle of the twisting profile is analyzed, and the mathematical model with the body power as the independent variable is put forward, and the setting of the technological parameters of the twisting profile initiating forming is preliminarily explored.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U671

【參考文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 張愛霞;火工矯正工藝數(shù)學(xué)模型及熱彈塑性分析[D];大連理工大學(xué);2003年

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本文編號(hào)：1931418