本文關鍵詞： 數控技術 漸進成形 成形機理 雕塑 CAD　出處：《南京航空航天大學》2009年碩士論文　論文類型：學位論文

【摘要】： 板料數控漸進成形技術是目前國際上一種新興的金屬板料成形技術,該技術不需要專用模具,可以通過數控設備加工出成形極限較大,形狀復雜的板材零件,適合于小批量、多品種和復雜的板料產品。 本文通過對金屬板料數控漸進成形技術成形機理的研究,建立了數控漸進成形工件壁厚與減薄率的計算公式,全面分析了數控漸進成形加工過程中各種因素對成形過程的影響,提出了完整的優(yōu)化這些因素的方法。 本文以數控漸進成形技術為基礎,提出了基于數控漸進成形的大型雕塑拼塊成形技術,確立了從三維雕塑CAD造型、雕塑模型縮放及分割、添加曲面片的工藝輔助面、漸進成形加工、修整毛料到最終組合成形的整個板料數控漸進成形雕塑產品制作技術路線。 針對雕塑模型的建立,研究了應用三維CAD軟件設計和采用逆向工程重建CAD雕塑曲面模型的兩種不同方法;并提出了雕塑模型曲面分割的原則,以及在CAD軟件中建構工藝輔助面的詳細方法。同時對實際線切割加工操作中電極絲、穿絲孔的位置、線切割路線的選擇及切割去除毛料的工藝技術細節(jié)展開了討論。對于各部分雕塑成形件的組合技術也展開了詳細的研究,提供了一系列的可行技術方案。 作者以愛因斯坦的頭像為實例進行了雕塑制作,驗證了這一套基于數控漸進成形的雕塑制作技術的可行性和優(yōu)越性,為此類雕塑產品的生產提供了可靠的范例。
[Abstract]:Sheet metal NC incremental forming technology is a new kind of sheet metal forming technology in the world at present. This technology does not need special die, and can be processed into sheet metal parts with high forming limit and complex shape through numerical control equipment, which is suitable for small batch. Many varieties and complex sheet products. In this paper, through the study of forming mechanism of NC incremental forming of metal sheet, the calculation formulas of wall thickness and thinning rate of NC progressive forming workpiece are established. The influence of various factors on the forming process in NC incremental forming process is analyzed, and the method of optimizing these factors is put forward. Based on the technology of numerical control progressive forming, this paper puts forward the forming technology of large scale sculpture based on numerical control progressive forming, and establishes the technological auxiliary surface from 3D sculpture CAD modeling, sculpture model scaling and segmentation, and adding curved surface. Progressive forming process, dressing wool material to the final combination of the whole sheet metal NC incremental forming sculpture production technology route. Aiming at the establishment of sculpture model, two different methods of using 3D CAD software to design and reconstruct CAD sculpture surface model by reverse engineering are studied, and the principle of surface segmentation of sculpture model is put forward. At the same time, the position of electrode wire and piercing hole in actual wire cutting operation is discussed. The selection of wire cutting route and the technological details of cutting and removing wool are discussed. The combination technology of various parts of sculpture forming parts is also studied in detail and a series of feasible technical schemes are provided. The author takes Einstein's portrait as an example to make sculpture, which verifies the feasibility and superiority of this set of sculpture production technology based on numerical control progressive forming, and provides a reliable example for the production of this kind of sculpture products.
【學位授予單位】：南京航空航天大學
【學位級別】：碩士
【學位授予年份】：2009
【分類號】：TG386

【引證文獻】

相關碩士學位論文 前1條

1 田飛;成形軌跡對板材漸進成形結果的影響研究[D];重慶大學;2012年

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本文編號：1552537