Sheet metal flat length can be calculated using cad softwares.
Sheet metal bending calculation software.
From there we can calculate the k factor and the bend deduction.
Bend o matic is a revolutionary professional software package to determine initial unfolded length.
Figure 2 illustrates the sheet that is bent with the bend angle of 90 degrees.
You only have to insert interior angle flange lengths k factor inside radius and material thickness.
Most sheet metal materials will conform to the calculations.
Many software packages like solid works inventor and solid edge will let you incorporate a bend allowance chart into its calculations when developing flat patterns.
Transition patterns available flat pattern segments lobsterback bend elbow.
Bending is one of the most common sheet metal fabrication operations.
90 degrees bend angle.
Although it is an option for calculating a bend in some cad programs such as solid works it is not often referred to in the actual manufacturing process since.
K factor in sheet metal bending is a constant that is used to calculate sheet metal flat length.
Also known as press braking flanging die bending folding and edging this method is used to deform a material to an angular shape.
In the example above it is indicated by a dashed blue line.
This is done through the application of force on a workpiece.
This page also includes a link to a on line sheet metal bend allowance calculator.
After bending the sheet we need to do some measurements as shown in figure 2.
Sheet metal calculator bend allowance equations and calculator.
With this free online tool we quickly get the sheet metal bend deduction and therefore the sheet metal blank initial flat length from the finished part measurements.
We will start by calculating the bend allowance.
Therefore using k factor there is no need to calculate sheet metal flat length manually.
The bend allowance is the amount of the neutral axis that bends.
Unfortunately sheet metal bending is not always going to be the same in every shop.
For example if the value of k factor for given material thickness and bending machines is known.
Cells on the right will output the desired values.
It is an integral and indispensable part of sheet metal bending operations that will not only automate and speed up the numerous repetitive calculations and drafting but also help you in achieving the same with the maximum degree of accuracy and efficiency thereby saving labor.
In the example above it is indicated by a dashed blue line.