發(fā)布時間：2018-06-10 01:10

  本文選題：冷軋管機(jī) + 孔型設(shè)計��； 參考：《燕山大學(xué)》2015年碩士論文

【摘要】：冷軋管機(jī)是利用變斷面環(huán)孔型以往復(fù)運動的方式對荒管進(jìn)行冷態(tài)軋制的工藝設(shè)備,現(xiàn)代金屬管材生產(chǎn),尤其是合金鋼、有色合金及各種高變形抗力合金管材的生產(chǎn)廣泛采用周期式冷軋管機(jī)。根據(jù)國內(nèi)用戶需求以及未來核電工業(yè)對不銹鋼管道的特殊要求,需要開發(fā)大型周期式兩輥冷軋管機(jī)。LG730是世界上最大的兩輥伺服型冷軋管機(jī),該機(jī)具有較好的開坯性能,用于軋制大規(guī)格的黑色及有色金屬無縫管。在冷軋管工業(yè)生產(chǎn)中,孔型設(shè)計是冷軋管機(jī)設(shè)計的核心技術(shù)。通過孔型設(shè)計,給金屬變形提供最合理的變形機(jī)制�？仔驮O(shè)計的合理性對冷軋無縫鋼管成品尺寸精度、表面光潔度和變形均勻性有著重要影響。同時,孔型的好壞還影響著軸向力、軋機(jī)生產(chǎn)效率和生產(chǎn)成本。目前,俄羅斯擁有世界最大兩輥冷軋管機(jī)組,其最大成品管外徑為Φ450mm。為了解決核電所需要的更大口徑冷軋鋼管(極限尺寸Φ730mm),在孔型設(shè)計理論和生產(chǎn)實踐上都存在較高的難度。國內(nèi)孔型設(shè)計一般采用經(jīng)驗加理論的設(shè)計思想,傳統(tǒng)孔型設(shè)計理論不完全適用大口徑鋼管。特別是對于管徑極限尺寸達(dá)到或超過Φ730mm的大口徑鋼管,國際上尚未開發(fā)。所以,LG730冷軋管機(jī)孔型設(shè)計在理論和實際生產(chǎn)中都沒有先例。破解大口徑孔型設(shè)計方法,建立孔型設(shè)計的數(shù)學(xué)模型也是本課題需要解決的主要問題。本課題密切結(jié)合企業(yè)需求,利用舍瓦金孔型設(shè)計方法和Meer孔型設(shè)計方法對LG730進(jìn)行孔型設(shè)計,并利用有限元軟件MARC建立彈塑性有限元模型,對世界最大的兩輥伺服型冷軋管機(jī)LG730典型品種進(jìn)行建模和過程仿真,主要研究機(jī)組環(huán)狀孔型設(shè)計和產(chǎn)品工藝制度。根據(jù)企業(yè)生產(chǎn)需求,開發(fā)了孔型設(shè)計軟件,建立了孔型設(shè)計參數(shù)化模型,解決了往復(fù)軋制與回轉(zhuǎn)送進(jìn)機(jī)構(gòu)系統(tǒng)建模問題,為LG730冷軋管機(jī)的孔型設(shè)計過程提供了重要的模擬實驗數(shù)據(jù)依據(jù),最終驗證利用Meer孔型設(shè)計方法在設(shè)計大口徑孔型的合理性。本課題研究對指導(dǎo)冷軋大口徑無縫鋼管工業(yè)生產(chǎn)將發(fā)揮一定作用,對推動我國冷軋無縫鋼管工業(yè)發(fā)展及其技術(shù)進(jìn)步將產(chǎn)生較大影響,具有一定的理論意義和實用價值。
[Abstract]:The cold rolling mill is a kind of process equipment which uses variable section ring pass to roll the cold rolling of the waste pipe in the way of reciprocating. The production of modern metal pipe, especially alloy steel, is very important. The production of non-ferrous alloy and all kinds of high-deformation resistant alloy pipes is widely used in cold-rolling mill. According to the needs of domestic customers and the special requirements of nuclear power industry for stainless steel pipes in the future, it is necessary to develop a large periodic two-roll cold pipe rolling mill .LG730, which is the largest two-roll servo cold pipe rolling machine in the world, and has good billet opening performance. For rolling large-specification black and non-ferrous seamless pipes. Pass design is the key technology of cold-rolled pipe mill design. Through the pass design, the most reasonable deformation mechanism is provided for metal deformation. The rationality of pass design plays an important role in dimension accuracy, surface finish and deformation uniformity of cold rolled seamless steel tube. At the same time, the pass also affects the axial force, mill production efficiency and production costs. At present, Russia has the world's largest two-high cold-rolled tube mill, the largest finished tube diameter 桅 450 mm. In order to solve the problem of large diameter cold rolled steel tube (limit size 桅 730mm) required by nuclear power, it is difficult to design pass theory and production practice. In domestic pass design, the design idea of experience addition theory is generally adopted, but the traditional pass design theory is not completely applicable to large diameter steel pipe. Especially for large diameter steel pipe with diameter limit size reaching or exceeding 桅 730mm, it has not been developed in the world. Therefore, there is no precedent in theoretical and practical production for pass design of LG730 cold rolling pipe mill. It is also the main problem to solve the problem of solving the method of large aperture pass design and establishing the mathematical model of pass design. According to the needs of the enterprise, the author designs the LG730 pass by using the Sheva gold pass design method and the Meer pass design method, and establishes the elastic-plastic finite element model by using the finite element software Marc. The modeling and process simulation of the world's largest two-roll servo cold pipe mill LG730 is carried out. The annular pass design and product process are studied. According to the production demand of the enterprise, the pass design software is developed, the parametric model of pass design is established, and the modeling problem of reciprocating rolling and rotary feed mechanism system is solved. It provides important experimental data for the pass design process of LG730 cold-rolled pipe mill, and finally verifies the rationality of using Meer pass design method to design large-caliber pass. This research will play a certain role in guiding the industrial production of cold rolled large seamless steel tube, and will have a great influence on the development and technical progress of cold rolled seamless steel pipe industry in China, which has certain theoretical significance and practical value.
【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TG335.12

【參考文獻(xiàn)】

相關(guān)期刊論文 前2條

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本文編號：2001457