對(duì)連軋管機(jī)機(jī)型選擇的探討
Discussion on Determination of Mandrel Pipe Mill Type
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摘要: 目前連軋管機(jī)已成為我國(guó)無(wú)縫鋼管生產(chǎn)的主力軋管機(jī)型。介紹了連軋管工藝、機(jī)型類別與特征, 以及不同規(guī)格的連軋管機(jī)的機(jī)型選擇, 并結(jié)合實(shí)際工程對(duì)機(jī)型選擇進(jìn)行了探討。分析認(rèn)為:從芯棒傳動(dòng)方式來(lái)看, 限動(dòng)芯棒軋管工藝是發(fā)展趨勢(shì);對(duì)于中小規(guī)格連軋管機(jī), 三輥連軋管機(jī)比二輥連軋管機(jī)生產(chǎn)出的產(chǎn)品壁厚精度更高, 但機(jī)組投資成本也更高;對(duì)大規(guī)格連軋管機(jī), 由于三輥的凸緣區(qū)小、軋槽淺速度差小, 選擇三輥連軋管機(jī)更為合理。Abstract: Up to now, the mandrel pipe mill has been used as the main type of pipe mills in the domestic seamless steel tube-making circles.Elaborated in the paper are the category and characteristics of the mandrel pipe mill, and type selection on the basis of different product size ranges.A discussion on the said type selection is made with examples of actual engineering projects.Finally, it is concluded that from the perspective of drive type of the mandrel, the retained-mandrel mill process will be the development trend;that speaking of the small or medium sized mandrel mill, although the 3-roll mandrel mill is capable of producing pipes with better wall thickness accuracy than that of pipes produced by the 2-roll mandrel mill, it requires higher initial investment than the latter;and that when it comes to the large-sized mandrel mill, the 3-roll mandrel mill will be a more reasonable choice due to its advantages as small flange area and shallow roll groove which provides small speed difference.
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