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针对数控折弯系统的控制精度不高,计算误差较大的问题,从工程实际的可操作性出发,构建BP网络,使用大量来源于生产现场的样本对网络进行训练,拟合出折弯半径和下模开口宽度、板材厚度间的关系曲线。根据平面几何和三角函数原理,利用折弯半径这一重要纽带,研究出进深和后档料的计算公式。把研究出的公式应用到自主研发的折弯数控系统中,并进行数据记录,测试结果表明,利用研究的计算公式可以精确定位后档料,准确控制上模滑块的行程,加工出来的样件完全符合工艺要求,大大提高了系统控制精度。
Aiming at the problem that the control precision of numerical control bending system is not high and the calculation error is large, the BP network is constructed based on the practical operability of the system, and a large number of samples from the production site are used to train the network to fit the bending radius And the lower die opening width, sheet thickness relationship between the curve. According to the principle of plane geometry and trigonometric function, using the important bond of bending radius, the formulas for calculating the depth and the back gauge are developed. The developed formulas are applied to the self-developed bending numerical control system and the data are recorded. The test results show that the calculation formula of the research can precisely locate the rear archives and accurately control the stroke of the upper mold slider, and the processed samples Pieces fully meet the technical requirements, greatly improving the system control accuracy.