本文選題：疊層銅母線 + 有限元分析　； 參考：《昆明理工大學(xué)》2017年碩士論文

【摘要】：疊層銅母線主要用來(lái)連接兩個(gè)電器元件,它具有能承載大電流、高電壓的特性,因此在電器柜、變壓所、工廠等電器領(lǐng)域得到廣泛應(yīng)用。沖裁加工是疊層銅母線常用的加工工序,為了保證其在工作過(guò)程中的使用安全和使用壽命,在使用疊層銅母線時(shí)對(duì)其加工質(zhì)量有較高的要求。原有的沖裁過(guò)程會(huì)出現(xiàn)孔徑尺寸變化較大、塌陷高度長(zhǎng)、每層沖裁不均勻、加工效率低等問(wèn)題,隨著工業(yè)和經(jīng)濟(jì)的快速發(fā)展,已不能滿足目前實(shí)際應(yīng)用中的要求。本文首先借助Deform-3D有限元分析軟件建立疊層銅母線的沖裁數(shù)值模型,并對(duì)疊層銅母線的沖裁過(guò)程進(jìn)行有限元數(shù)值模擬,研究其微觀機(jī)理的變化。通過(guò)對(duì)材料應(yīng)力應(yīng)變曲線、損傷值曲線、靜水壓應(yīng)力、材料塑性流動(dòng)等因素的分析,研究了疊層銅母線在沖裁過(guò)程中的機(jī)理變化,疊層銅母線在沖裁過(guò)程中,越靠近凸凹模刃口,材料的塑性流動(dòng)、應(yīng)力應(yīng)變和損傷值就越大。然后搭建PLC控制三合一母線加工機(jī)的實(shí)驗(yàn)平臺(tái),分析了沖裁過(guò)程中載荷-位移的關(guān)系曲線,研究了孔徑尺寸、塌陷高度隨位移變化的曲線,并用實(shí)驗(yàn)方法研究疊層銅母線沖裁的宏觀過(guò)程,驗(yàn)證了相關(guān)參數(shù)。最后從多個(gè)方面研究了影響疊層銅母線沖裁質(zhì)量的因素,借鑒單層厚板和單層薄板的沖裁機(jī)理,對(duì)比間隙、壓邊力、厚度等因素對(duì)疊層銅母線沖裁質(zhì)量的影響,發(fā)現(xiàn)單邊間隙、壓邊力是影響疊層銅母線沖裁質(zhì)量的主要因素�？紤]到實(shí)際生產(chǎn)和模具等因素,單邊間隙取0.4mm為宜,壓邊力可取沖裁載荷的30%-40%。同時(shí),工作環(huán)境和加工要求的不同,可以根據(jù)疊層銅母線的沖裁成形規(guī)律來(lái)優(yōu)化疊層銅母線沖裁過(guò)程中的各個(gè)參數(shù),對(duì)今后疊層銅母線沖裁的生產(chǎn)加工有一定的參考價(jià)值。
[Abstract]:Laminated copper busbar is mainly used to connect two electrical components. It can carry high current and high voltage, so it has been widely used in electric cabinets, voltage stations, factories and other electrical applications. Blanking is a common working procedure for laminated copper busbar. In order to ensure its safety and service life, the quality of laminated copper busbar is very high when it is used. The original blanking process will have some problems, such as large change of aperture size, long collapse height, uneven blanking and low processing efficiency. With the rapid development of industry and economy, it can no longer meet the requirements of practical application. In this paper, the numerical model of blanking of laminated copper busbar is established by means of Deform-3D software, and the process of blanking of laminated copper busbar is simulated by finite element method, and the change of microcosmic mechanism is studied. Based on the analysis of stress-strain curve, damage value curve, hydrostatic stress and plastic flow of materials, the mechanism of laminated copper busbar in blanking process is studied, and the mechanism of laminated copper busbar in blanking process is studied. The closer it is to the edge of the die, the larger the plastic flow, the greater the stress, strain and damage. Then the experiment platform of PLC control three-in-one busbar machine is built, the relation curve of load-displacement in blanking process is analyzed, and the curve of aperture size and collapse height changing with displacement is studied. The macroscopic process of blanking of laminated copper busbar is studied by experimental method, and the relevant parameters are verified. Finally, the factors affecting the blanking quality of laminated copper busbar are studied from many aspects, drawing lessons from the blanking mechanism of single layer thick plate and single layer sheet, comparing the influence of clearance, blank holder force, thickness and other factors on the blanking quality of laminated copper busbar, the one-sided gap is found. The blank holder force is the main factor that affects the blanking quality of laminated copper busbar. Considering the factors such as actual production and die, 0.4mm is suitable for unilateral clearance, and blank holder force can be used for punching 30-40 of the load. At the same time, according to the different working environment and processing requirements, the parameters in the process of blanking of laminated copper busbar can be optimized according to the forming law of laminated copper busbar, which has certain reference value for the production and processing of laminated copper busbar blanking in the future.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TG386.2

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