This bending deduction calculation formula is calculated through long-term sheet metal processing. This is also a simple calculation method. The underlying theoretical formulation of this calculation is: sheet metal unfolding = length a + length b − 2 × material thickness +(1/3 × material thickness) × the expansion factor. The preceding step involves calculating the lengths of the shortest parallel lines and then adding the stretching index. Everyone believes that metal sheet materials undergo tensile deformation during bending.

bending deduction = 2 times the thickness of the material-(0.72 t-0.075V-0.01) this formula calculation is an improvement on the calculation method in the online magazine graduation thesis. His characteristic is to take into account the harm of the total width of the bending die to the bending interpretation. Experimental data information According to the carbon steel thick plate experiment, the accuracy of other materials is not clear. The small grid diagram was used to calculate the bending of aluminum alloy plates with a thickness of 4 times the material thickness and groove width. The resulting values are still relatively accurate. The expansion calculation of aluminum alloy plate is very accurate.

indicates that T is the specific thickness of the metal material plate, not the name thickness. The above two types of calculation roughly, the thickness is not strictly managed. This formula should be calculated with the specific thickness accurately measured by the micrometer.

is the total width of the wound in the upper bending die. Generally speaking, the total width of the wound is 6-8 times the thickness of the material, and the specific demand is calculated as much as possible, for example, bending 1.5 times with 10 upper dies.