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曲柄压力机摩擦制动器在制动过程中的发热问题是一个重要问题。在现行的设计方法中是核算磨损系数K值,但其不尽反映实际情况。本文从付立叶的热传导微分方程出发,结合摩擦制动器的具体边界条件,利用有限差分方法,借助电子计算机算出制动器在不断地制动过程中的温升过程,并与在试验台上进行的多组实测温升数据进行对比,两者很好地吻合。本文还根据理论分析及实验结果分析了影响温升的因素,提出了降低温升可采取的措施。同时,在实测数据的基础上进行了多项回归,得出了计算温升的新公式,为压力机设计工作者在设计摩擦制动器的阶段就可以预测工作时的温升情况提供了条件。
Crank press friction brake in the braking process of heat problem is an important issue. In the current design method is to calculate the wear coefficient K value, but it does not reflect the actual situation. In this paper, starting from Fourier heat conduction differential equation, the friction braking conditions of the specific boundary conditions, the use of finite difference method, with the help of electronic computer to calculate the brake in the process of constant braking process, and with the test stand on the more Group measured temperature data for comparison, the two agree well. Based on theoretical analysis and experimental results, this paper also analyzes the factors that affect the temperature rise, and puts forward measures that can be taken to reduce the temperature rise. At the same time, based on the measured data, a number of regressions were made and a new formula for calculating the temperature rise was obtained. This provides the conditions for the designer of the press to predict the temperature rise during working at the stage of designing the friction brake.