![]() The bend allowance is the material added to the actual leg lengths of the part in order to develop a flat pattern. When that metal deforms, a small amount of length is added to the original part. Deductions have to be made from desired part sizes for flat patterns to results in a correct flat size. Using the same method, it is easy to calculate the K-factor values for the several types of materials listed above. When sheet metal is bent, the metal around the bend becomes deformed and stretched. BA (1.57 K T) + (1.57 R) Therefore, by comparing the above calculation formula, the value of K for soft brass or soft copper materials can be obtained as 1.57xk 0.55, or K 0.35. INSTRUCTIONS: Choose units and enter the following:īend Allowance (BA): The calculator returns the answer in inches (in). However this can be automatically converted to compatible units via the pull-down menu. The Bend Allowance Calculator uses the thickness of the material, bend angle, inside radius, and K factor to find the bend allowance. Neutral axis an imaginary line that has the same length after bending as it had before bending. If youre giving her an allowance then you could stop that for a few weeks. ![]()
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