胶印机胶辊弹性压力的计算

On the Elastic Pressure Calculation of Offset Rollers

在胶印机胶辊压缩区域面积计算和胶皮刚度测试的基础上,给出了一种计算胶辊弹性压力及其时域波形的方法.首先讨论了胶辊胶皮的压缩刚度的概念,指出胶皮压力的大小与压缩面积、胶皮宽度近似成正比,从而说明压缩刚度与压缩面积成正比.接着讨论了用积分方法求解压缩面积的方法,并给出了积分式及其相应的计算公式.在压缩面积计算的基础上,计算出胶辊的弹性压力,从而求得胶辊的弹性压力波形图,并给出了对压力波形进行FFT(fast Fourier transform)分析所得到的弹性压力频谱图.

On the basis of the calculation of compressed roller area and the rubber rigidity test, the authors give a method of calculating the elastic pressure of offset rollers and the waveform of time domain. They first discuss the concept of compression -rigidity of offset roller rubber and point out that the rubber pressure is about directly proportional to the compressed area and the rubber width, that is to say, the compression rigidity is directly proportional to the compressed area; Then, they discuss the method of adopting integral method to calculate the compressed area and give out the integral formula and its corresponding calculation result. On the basis of calculating the compressed area, the elastic pressure of offset roller is calculated so as to obtain its waveform; Finally, the authors show the elastic pressure frequency spectrum obtained from the FFT (fast Fourier transform) analysis on the pressure waveform.