锻压技术

大型热模锻压力机机身横向振动与变形的动态测试

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

作者：孙友松周庆刚黎勉程永奇

单位：广东工业大学

关键词：压力机机身变形偏载振动动态测试

分类号：TG316

出版年,卷(期):页码：2015,40(12):71-76

摘要：

某40 MN大型双点热模锻压力机在负荷30 MN试生产时，发生了严重的导轨磨损事故。为寻求事故原因，设计了压力机工作过程机身振动和变形的“分点测量-合成分析”的测试方案。采用激光位移传感器和数字存储示波器对高达8 m的机身6个部位分别进行了动态测量，通过合成分析获得了机身的实际振动和变形情况。机身在30 MN负荷时最大偏摆位移超过5 mm；伴随振动，机身产生了较大的横向变形，机身横向最大压缩超过1.2 mm，影响了导轨间隙，这是导致导轨磨损的主要原因。分析认为,对大型多工位压力机而言，机身变形不仅影响锻件质量，也影响压力机正常运行，应充分注意机身的刚度设计。

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.

基金项目：

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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