荒管端部壁厚增厚补偿控制策略及补偿机制

doi:10.13228/j.boyuan.issn0449-749x.20220471

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Abstract Aiming at the thickening defects on the seamless pipe ends during tension reducing,basing on the compensation scheme of the wall thickness on pipe ends and the head and tail sharpening technology,the sharpening parameters of the sharpened pierced billet are pre-designed. With the help of ABAQUS finite element software,the whole process simulation model of tension reduction was established and its accuracy was verified by field test. The effects of different sharpening amount and sharpening length on the cutting loss length of the ends of pipe and the law of compensation of thickening wall were studied by single control variable method. Establishing the judgement basis of "full compensation area","over compensation area" and "unreasonable area" with different compensation effects. Considering the characteristics of long process and multi-process of seamless pipe production process and the genetic characteristics of pipe size under different processes,different passes and different tools,a control strategy of sharpened pierced billet compensation of multi-process joint control of tandem rolling-tension reducing is proposed. The design criterion of cutting parameters for pierced billet is given and the prediction model of effective value range of sharpening amount is derived basing on a large number of wall thickness data. The compensation control model of the head and tail sharpening of the sharpened pierced billet is established during the whole process of tension reduction,biting steel-steady rolling-casting steel. The section shape and dimensional accuracy of seamless pipe before and after compensation are compared and analyzed. The results show that the compensation control strategy for the sharpened pierced billet has significant suppression effect of defects. The strategy is extended to the pipe process of tension reduction with different specifications and extension coefficients,the applicability of the head and tail sharpening compensation control method is verified. Taking the length of pipe end cutting loss reduced by 60% as the measurement standard,there exists an effective value range for the sharpening amount of tensioning products of various specifications. The research has important guiding significance and industry practical value for improving the quality stability and yield of seamless pipe products.

Key words： tension reduction pipe end thickening head and tail sharpening technology sharpened pierced billet compensation control

Received: 11 July 2022

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	Articles by authors
	WANG Fei-xue
	ZHANG Jing-yan
	WANG Ze-kun
	LI Fei-fei
	ZANG Xin-liang

Cite this article:

WANG Fei-xue,ZHANG Jing-yan,WANG Ze-kun等. Contral strategy and mechanism of compensation of thickened wall thickness on ends of pierced billet[J]. Iron and Steel, 2023, 58(2): 104-112.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20220471 OR http://www.chinamet.cn/Jweb_gt/EN/Y2023/V58/I2/104

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