Transactions of Materials and Heat Treatment

Title：Dynamic measure of horizontal oscillations and deformations for a large-tonnage hot-forging press

Authors： Sun Yousong Zhou Qinggang Li Mian Cheng Yongqi

Unit： Guangdong University of Technology

KeyWords： press frame deformation eccentric load oscillation dynamic measure

ClassificationCode：TG316

year,vol(issue):pagenumber：2015,40(12):71-76

Abstract：

Serious wears of slide rails took place, when the working pressure was only 30 MN in trial production for a 40 MN double-point hot-forging press. In order to find the failure reasons, a plan of point by point measurement and composite analysis was designed to measure the oscillation and deformation of the press. With a laser sensor and digital oscilloscope, the horizontal displacements at six points on the press frame with a height of 8 m were measured dynamically. The actual vibration and deformation of the fuselage were obtained by composite analysis, and the maximum deflection of the fuselage was more than 5 mm. With oscillating, obvious horizontal deformations of the fuselage took place, and the maximum horizontal deformation of the fuselage was more than 1.2 mm to affect the clearances at slide rails. So the above results become the main reason for the wearing of slide rails. The analysis results show that for large-tonnage multi-stage presses, the fuselage deformations affect not only the product quality, but also the normal operation of the press. Therefore, the stiffness design of the fuselage should be emphasized.

Funds：

国家自然科学基金资助项目(51175088)；广东省战略性新兴产业发展专项（2012A090100014）

作者简介：孙友松（1944-），男，硕士，教授，博士生导师

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