How To Blanking Sheet Before Bending

How To Blanking Sheet Before Bending

The calculation methods of sheet metal bending as follows:

数控折弯机90度折弯

CNC press brakes for 90 degree sheet  bending profiles

无锡神冲数控折弯机厂家觉得折弯系数最简单的计算方法就属90度折弯系数经验公式：1.7倍料厚计算方法。

Most of cnc press brakes  manufacturer thinks that the simplest calculation method of bending coefficient belongs to the empirical formula of 90 degree bending coefficient: 1.7 times material thickness calculation method.

用在90钣金折弯加工中，一个直角弯减去1.7倍的料厚。例如：材料是1mm铁板，折弯角度是90度，折弯尺寸分别是100mm和50mm，那么计算展开方法是：100+50-1.7=148.3mm。计算的就是展开长度了。

Used in 90 sheet metal bending, a right angle bend minus 1.7 times the material thickness. For example, if the material is 1mm iron plate, the bending angle is 90 degrees, and the bending dimensions are 100mm and 50mm respectively, the calculation expansion method is: 100 + 50-1.7 = 148.3mm. The calculation is the expansion length.

这个1.7有人说是1.6或1.65倍，对的，是可以轻微调整的。因为每家钣金厂用的折弯模具都不完全相同，是有轻微误差的，不用调整也可以使用，要求高也可以稍微调整一下。

This 1.7 is said to be 1.6 or 1.65 times. Yes, it can be slightly adjusted. Because the bending dies used by each sheet metal factory are not exactly the same, there are slight errors, and they can be used without adjustment. They can also be slightly adjusted if they have high requirements.

CNC Press brakes sheet bending over 90 degree

钣金折弯不只是90度折弯，还有非90度的折弯呢，有最简单的计算方法吗? 

Sheet metal bending is not only 90 degree bending, but also have some over 90 degree bending profiles. Is there the simplest calculation method?  

这个还真没有，准确的计算非90度折弯系数有个计算公式，就是利用中性层的概念，计算折弯那段圆弧的弧长，而最终求出折弯系数。

This is really not true. There is a calculation formula for accurately calculating the non 90 degree bending coefficient, that is, using the concept of neutral layer, calculate the arc length of the bending arc, and finally calculate the bending coefficient.

这里说一个特殊的角度，可以用简单方法计算折弯系数。当钣金折弯角度为135度时，折弯系数可以减去0.5倍的材料厚度。比如：材料是1mm铁板，折弯角度是135度，折弯尺寸分别是100mm和50mm，那么计算展开方法是：100+50-0.5=149.5mm。其他钣金厚度也可以同样用这个方法计算。只适用于135度其他角度不可用

For a special angle, the bending coefficient can be calculated by a simple method. When the sheet metal bending angle is 135 degrees, the bending factor can be reduced by 0.5 times the material thickness. For example, if the material is 1mm iron plate, the bending angle is 135 degrees, and the bending dimensions are 100mm and 50mm respectively, the calculation expansion method is: 100 + 50-0.5 = 149.5mm. Other sheet metal thicknesses can also be calculated by this method. Only applicable to 135 degrees. Other angles are not available

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