论文部分内容阅读
当前,我国1000毫米以上的初轧机生产的大钢坯,大都采用浮动轴式剪切机切成定尺。显然,充分发挥这些剪切机的能力,对整个轧钢系统生产,具有重要意义。为挖潜、革新和改造的需要在三次综合测试的基础上,对某初轧厂1600T 浮动轴钢坯剪切机的力能参数和机架振动问题进行了测试分析。通过力能参数分析,查明了剪机负荷水平,获得了有关剪切力、主轴扭矩、电机电流、单位剪切阻力、单位剪切能耗等科学数据,提出了计算剪切力的实验方法和诺莫图,并进而拟订了旨在提高剪机技术经济指标的实用剪切断面和对应负荷系列数表。通过振动测试分析,对机架振因进行了探讨和判断,分析了液压平衡系统的动态过程,导出了与实测示波图基本相符的液压振动方程;应用中值定理对减振效应作了验证,导出了冲击振动公式;对“墩刀”现象也作了动态分析,导出了动荷系数的解析式,可为解决机架振动和“墩刀”问题,提供理论依据。
At present, most of the large billet produced by the initial rolling mill of more than 1000 mm in China is cut to length by a floating shaft cutter. Obviously, giving full play to the ability of these shears is of great importance to the entire steel rolling production. In order to tap the potential, innovation and transformation on the basis of three comprehensive tests, a 1600T floating shaft billet shear strength and vibration parameters of the billet were tested and analyzed. Through the analysis of force and energy parameters, the load level of the shear was ascertained, and the scientific data about shear force, spindle torque, motor current, unit shear resistance and unit shear energy consumption were obtained, and the experimental method for calculating shear force And Normobile, and then developed a series of practical shear sections and corresponding load series designed to improve the technical and economic indicators of shearing machines. Through the vibration test and analysis, the cause of the frame was discussed and judged, the dynamic process of the hydraulic balance system was analyzed, and the hydraulic vibration equation basically consistent with the measured oscillogram was derived. The vibration effect was verified by the median value theorem , The formula of shock vibration is deduced; the phenomenon of “pier cutter” is also analyzed dynamically and the analytic formula of dynamic load coefficient is deduced, which can provide the theoretical basis for solving the problem of rack vibration and “pier cutter”.