發(fā)布時間：2018-03-30 09:20

  本文選題：工藝過程　切入點：建模　出處：《蘭州理工大學(xué)》2017年碩士論文

【摘要】：3D打印技術(shù)作為一種新型的快速成形技術(shù),它以3D數(shù)字模型為原型,通過逐層堆疊累積的方式將3D模型構(gòu)建成為真實的物體,其核心思想是模型離散過程和材料堆積過程的。3D打印技術(shù)采用“增材制造”方法,有效解決了傳統(tǒng)的制造技術(shù)中“減材制造”的資源浪費問題;鑄造技術(shù)是一種古老的,成熟的制造技術(shù)。但鑄型的制作受到模樣的制約,導(dǎo)致精密鑄造的發(fā)展受到限制,特別是一些曲面造型較多,且壁厚較薄的零件,模樣的制作工藝復(fù)雜,加工比較費時。如果把精密鑄造技術(shù)與3D打印技術(shù)相結(jié)合,利用3D打印設(shè)備打印一些傳統(tǒng)制造無法加工的模樣,或者加工較為困難的模樣,精密鑄造就可以快速的鑄造一些尺寸精度要求較高、形狀結(jié)構(gòu)復(fù)雜、薄壁、無余量或者少余量的金屬件。近些年,我國大力研發(fā)精密鑄造技術(shù),但大多數(shù)的鑄型或者模具的制作都離不開模樣,而且在很多場合依然用的是傳統(tǒng)的木模,導(dǎo)致鑄型的精度不高,零件的加工余量較大,成本較高,尤其是一些更新?lián)Q代較快的鑄件,如果利用傳統(tǒng)的制模方式就會導(dǎo)致模具的設(shè)計、制造周期比較長,但如果把3D打印技術(shù)運用到模具制造中,就可以為模具快速設(shè)計、制造提供一種新的思路、新的途徑。本文結(jié)合實際,借助間接制模技術(shù)的工藝路線以及木模的生產(chǎn)工藝,利用3D打印技術(shù)制作樹脂模樣來代替?zhèn)鹘y(tǒng)的木模工藝過程進行了研究探討。通過建立輪轂?zāi)Ｐ?打印輪轂?zāi)��?探討利用3D打印技術(shù)打印模樣的工藝過程,以及在建模過程中建模軟件,建模方式的選擇,模樣設(shè)計時應(yīng)該考慮的因素、原則;并且利用不同的軟件對輪轂?zāi)�樣進行STL格式轉(zhuǎn)換,研究了利用不同的軟件進行轉(zhuǎn)換時,操作方式及參數(shù)的設(shè)置原則,以及不同的處理方式對模型表面精度的影響。最后打印完成了輪轂?zāi)�樣。本文的研究對利�?D打印技術(shù)打印鑄型中的模樣有一定的參考意義。
[Abstract]:As a new kind of rapid prototyping technology, 3D printing technology takes 3D digital model as its prototype and builds 3D model into real object by stacking and accumulating layer by layer. The core idea is that the. 3D printing technology of model discrete process and material stacking process adopts the method of "increasing material manufacture", which effectively solves the problem of "reducing material manufacturing" in traditional manufacturing technology, and the foundry technology is an ancient one. Mature manufacturing technology. However, the manufacture of mould is restricted by pattern, which results in the development of precision casting being restricted. Especially for some parts with more curved surface and thinner wall thickness, the making process of pattern is complicated. It takes more time to process. If you combine precision casting with 3D printing, use 3D printing equipment to print patterns that are traditionally impossible to process, or that are more difficult to process. Precision casting can quickly cast some metal parts with high dimensional accuracy, complicated shape and structure, thin wall, no allowance or little allowance. In recent years, China has made great efforts to develop precision casting technology. However, most molds or molds can not be made without patterns, and in many cases traditional wood moulds are still used, which leads to low precision of molds, large machining allowance and high cost of parts. In particular, some of the newer and faster castings, if they use the traditional mold making method, will lead to the design of the mould, and the manufacturing period is relatively long. But if the 3D printing technology is applied to the mold manufacturing, it can be used to design the mould quickly. Manufacturing provides a new way of thinking, a new way. This paper combines with practice, with the help of indirect molding technology and the production process of wood mold, The process of using 3D printing technology to make resin pattern instead of traditional wood mould is studied. By establishing wheel hub model, printing hub pattern and using 3D printing technology to print pattern, the process of printing pattern is discussed. In the process of modeling, the selection of modeling software, the selection of modeling methods, the factors and principles that should be considered in pattern design, and the STL format conversion of hub pattern with different software are studied. The operation mode and parameter setting principle, as well as the influence of different processing methods on the surface precision of the model. Finally, the pattern of the wheel hub is finished by printing. The research in this paper has some reference significance for printing the pattern in the mold by using 3D printing technology.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TG241

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本文編號：1685296