Analysis of Casting Hook Load on Ladle Crane
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TECHNICAL ARTICLE—PEER-REVIEWED
Analysis of Casting Hook Load on Ladle Crane Huicheng Yang
. Yixiao Qin . Jiaxin Ren . Jinpeng Gu
Submitted: 9 October 2020 / in revised form: 28 October 2020 / Accepted: 1 November 2020 Ó ASM International 2020
Abstract Ladle cranes are metallurgical equipment used to carry and pour molten metal. Their security and operational reliability are important. This paper adopts mechanical analysis to obtain the method for formulating allowable casting hook loading when the ladle crane is pouring molten steel. Taking advantage of ladle’s inner cavity size and molten steel height, the corresponding relationship between tilting moment and tilting angle is obtained. Then, according to tilting moment, the relationship between casting hook load and tilting angle is found, and then used to obtain the precise algorithm for the casting hook load on the ladle crane. The research shows that when the ladle is pouring molten steel, the tilting moment and the casting hook load on ladle crane show a trend of rising first and then decreasing; when molten steel had been poured, dumping the steel slag with different tilting mechanisms results in different casting hook loads on the ladle crane. Keywords Ladle crane Casting hook Load analysis Tilting mechanism
Introduction The ladle crane is one of the most important pieces of equipment in the steelmaking process, and the ladle is the main functional part of the ladle crane (Fig. 1). With advancement of metallurgical technology, the ladle has the H. Yang Y. Qin (&) J. Ren J. Gu School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China e-mail: [email protected] H. Yang e-mail: [email protected]
functions of holding, carrying, refining, pouring molten steel, as well as dumping slag and landing. When ladle crane is pouring, the influence of the ladle during different tilting operations varies. In 2001, Kazuhiko Terashima and Ken’ichiYano studied control of ladle pouring, with a goal of controlling the sloshing of the ladle during pouring processes by means of a three-axis synchronous control [1]. In 2002, Ken’ichiYano studied advanced control of liquid containers along an oblique transfer path, especially focusing on the suppression of liquid sloshing, and proposed a method for actively controlling rotational motion of the container [2]. In the same year, Yu Sugimoto and Ken’ichiYano used a tilt-type automatic pouring robot to keep the molten steel of the pouring cup at a constant level, and control the liquid level with a two-degree-of-freedom control system to complete automatic pouring [3]. In 2003, Kazuhiko Terashima and Ken’ichi Yano proposed a method for predicting the weight of molten metal when ladle is pouring, and a method for inhibiting liquid sloshing caused by ladle swing [4]. In 2008, Yoshiyuki Noda and Yusuke Matsuo examined an automatic pouring system which was used in the foundry industry, using a new flow estimation method with extended Kalman filter and sensor dynamic compensation,
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