钢板展开长度的计算.doc

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1、钢板展开长度的计算一、三点折弯机展开尺寸计算：L=A+B-YY：圆角的减量值Y值按下表查取。板厚(mm)扳边角度30°45°60°90°120°模具11374.42131.0121.519.510.56.431.431.01222011.47.33.51.831.0122.54.0～4.235.8(5)2.731.02446.8594.231.040610.8二、普通折弯机展开尺寸计算：L=A+B-YY：圆角的减量值Y值按下表查取。板厚Y板厚Y11.6610.01.52.5711.523.3813.02.54.0915.035.01016

2、.53.55.846.658.02三、较厚板展开计算：1、中性层位置的经验系数表R/t0.10.250.51.02.03.04.0>4x0.320.350.380.420.4550.470.4750.52、当弯曲半径R≥0.5t时的展开计算公式L=A+B+πα(R+xt)/180当α=90°时上面的公式可化简为:L=A+B+π(R+xt)/23、当R/t=1,α=90°时圆角展开长度表t11.522.53456L(圆角）2.233.354.465.586.698.9211.1513.38t810121416182022L(圆角)17.84

3、22.326.7731.2335.6940.1544.649.074、当R/t=1,α=90°时钢板展开计算公式简化为：L=A+B-YY：圆角的减量值Y值按下表查取。t11.522.53456Y1.772.653.544.425.317.088.8510.62t810121416182022Y14.1617.721.2324.7728.3131.8535.438.932