折弯作业指导书讲解文档格式.docx

1、中性层位置系数Xo按t/查表25得出。表25 中性层位置系数表r/0.250.50.812345678101214Xo0.20.30.350.370.40.410.430.440.450.460.470.480.502 薄板/4圆弧的展开长度Y=（r+Xo）/2（2）或Y=（R-+Xo）/2 （3）薄板/4圆弧的展开长度Y值可查表26得出。表26 薄板1/4圆弧展开长度表（y） mm R（r）1.01.21.52.02.53.0内径外径1.872.012.122.143.472.673.632.343.733.831.783.985.064.265.303.955.345.413.515.62

2、5.856.116.646.025.956.947.055.117.214.837.467.723.537.988.227.448.417.148.538.646.718.816.449.079.345.229.589.809.0110.008.7310.1210.248.3110.408.0310.6810.947.1111.1911.3910.6011.5810.3111.7011.829.9012.009.6312.2712.558.7212.8012.9612.1713.1611.8913.2913.4111.4913.5911.2213.8714.1510.3314.41914.53

3、13.7414.7414.8714.9913.0815.1712.8115.4615.7411.7816.0216.1015.3216.3415.0516.4516.5014.6716.7614.4017.0617.3413.3817.611117.6716.8017.9116.6318.0318.1616.2518.3615.9818.6518.9314.9719.2119.2418.4619.4818.2219.6019.7417.8319.9317.5220.2320.5316.5620.811320.0921.0619.7921.2121.3119.4121.5119.1521.822

4、2.1222.391422.3821.6022.6221.3622.7822.0921.0023.0920.7323.4023.7019.7523.991523.9523.1724.1922.9824.3524.5022.5724.6722.3124.9925.3021.3425.591625.5324.7425.7624.9825.9224.3626.0024.1526.2523.8926.5726.8822.9327.171727.1026.3127.3326.0827.4927.6527.8325.4728.1628.4624.5128.761820.6727.8828.9029.062

5、9.2229.4127.0629.7430.0526.1030.351930.2429.4530.4730.6330.7931.2028.6531.3131.7927.6831.932031.8131.0232.0432.2032.3632.5933.0533.2229.2733.5228.722133.3833.6232.2633.7733.9834.1634.6334.8030.8836.262234.9535.1933.9335.3435.5035.7436.2136.3832.4436.852336.5236.7636.5036.9136.3437.6736.1937.3137.783

6、7.9634.0238.442438.0038.3037.0738.4838.6438.6039.3639.5436.5440.0235.262539.6638.8039.7040.0640.2138.3340.4538.0940.8437.7041.1237.3341.602641.2340.4641.4770.2141.6341.7339.9042.0242.4142.6938.9143.182742.8043.0441.7843.2043.3343.5943.9844.2740.4844.762844.3844.6143.3644.7044.9243.6445.1642.8846.554

7、5.8541.9146.342945.9546.1846.5046.7347.1247.4343.4947.763047.5247.7547.9148.0748.3048.6949.0145.0749.34内径项值为按内径r所查得的值:外径项值为按外径R值所查得的值.当弯曲半径的尾数为0.5时,则应按查表系数加0.79.3 按薄钣折弯系数的计算方法:展开长度计算公式:Y=a+b+x（4）式中:x=薄钣折弯系数.可查表27得出.表27 薄钣折弯系数表（x） mm0.10.1250.100.070.035-0.125-0.21-0.3-0.42-0.64-0.85-1.05-1.5-1.9-2.3

8、4-3.2-4.070.150.120.080.05-0.06-0.14-0.22-0.35-0.56-0.78-1.0-1.4-1.84-2.35-3.1-4.00.220.200.18-1.07-0.36-0.28-0.48-0.7-0.9-1.34-1.79-2.2-3.0-3.90.330.310.110.04-0.07-0.5-1.12-1.57-1.96-2.8-3.660.380.23-0.57-0.96-1.38-1.82-2.66-3.50.560.550.530.510.36-0.01-0.23-0.45-0.82-1.25-1.67-2.52-3.380.700.680.

9、670.660.63-0.02-0.62-1.02-1.47-2.3-3.720.930.920.910.890.010.760.620.280.09-0.27-0.68-1.10-1.93-2.781.301.161.151.131.071.040.960.880.750.570.39-0.75-1.60-2.451.421.401.391.381.361.321.261.200.870.69-0.4粗折线之左其值为正,粗折线之右其值为负.在其角折弯时,对于比较厚的钢板和铝板的伸长系数略有不同.钢板折弯系数与铝板折弯系数的对比:可参见表28.表28 钢板和铝板折弯系数对比表 mm钢板铝板0.

10、400.600.901.051.254 折弯零件展开长度计算公式表:见表29表29 折弯零件展开长度计算公式表序号零件弯曲程度草图公式一端变成90角L=a+b+（r+x）/2两端变成90L=a+b+c+（r+x）变成四个90L=2a+2b+c+（r1+x1）+（r2+x2）4折弯操作：正确选取凸凹模:根据工件的板厚,折弯角及折弯尺寸选取适当的凸凹模.此外还要遵守某些设备（如进口折弯机）对凸凹模使用的具体规定.凹模开口选择普通折弯机标准为板厚的8倍数控标准为6倍。（薄板折弯大R时需按照展开料选择凹模）定位:根据折弯尺寸定位.确定折弯顺序:某些工件需折弯几道,因此必须选取正确的折弯顺序,才能折出每

11、一道弯.试压:根据工件有有板厚和宽度估算适当的折弯压力,然后试压.试压后检查工件尺寸.调整参数:根据试压的结果调整定位,折弯压力等参数,直到折出合格的产品.整形:折弯后某些工件需要适当的进行整形,如折弯角的垂直度等. 5凸凹模选取原则:凸模圆角半径按图纸规定选取.凹模开口尺寸S按选取:3 不锈钢材料压力计算P=650x（Sx1.5）xL/V凹模选择需尽量用大点以减少受力表30 凹模选择表 V下模宽度R角度B最小尺寸板厚t1.80.72.6401055.255801151801.76.54165951452102602.7.81201752153352.710.46090130160250360

12、3.4752002905204.285230410640N/mm2650xSxL/V140190340540770351703004606601504005801030457.5910508.53232048082012304207501170折弯大R时尽量选择开口宽一点的下模以减少压力 下模槽口的选择:数控折弯机V=Sx6，普通折弯机V=Sx8,文 件 更 改 记 录更改单号更改标记更 改 项更改日期更 改 者折弯操作红色折弯操作49.24楚德年提 出 折弯参考系数表 一.下表仅适用于本公司计算展开料用（适用材料:冷、热轧板） 二.选择刀片时应严格对照下表选相应的槽宽 三.计算展开长的方式

13、例: 5.0以上的板厚 画图测量 测量办法：折弯内引边板厚的0.4部分画线，得展开周长 展开长=A+B-板厚*1.75 （3MM以下） 计算公式:A+B-C=展开长 折锐角多减一个料厚、折钝角少减一个料厚 公式中C表示直接系数,依照产品的板厚及R角,在下表中查找系数板厚 刀片T1T1.2T1.5T2.0T2.5T3.0 T4.0T5.0直接系数槽宽R0.51.761.983.284.364.666.088.23R22.32.62 83.073.684.534.966.368.52R32.662.823.253.774.85.286.39R53.053.163.614.355.145.596.7

14、28.69R64.224.394.955.376.196.637.619.38R84.374.554.995.486.286.677.64R105.835.846.827.67.829.0310.233 如何提高产品合格率1、定期对设备进行维护保养和调试，保证设备精度和性能良好。2、看清楚图纸。与工艺员沟通弄清楚产品要求3、计算找出合适相匹配的模具4、试折弯仔细检查产品是否合格 怎样让自己做事更细心： 1、顺序：养成良好的工作顺序。 2、计划：把自己的时间安排恰当，不至于很匆忙。 3、观念：不要把“以为”来了事，一定要强制自己检查，向对待新产品一样。 4、不要把希望寄托于别人，自己的产品出错都是自己的问题，与别人无关折弯操作指导书添加折弯参考系数表及提高产品质量注意事项9.30