It is important to test press brake dies prior to production process to be sure that the angle and sizes of  any bending detail have durability according to demands and to find out the intervention of the planned top blade.

In general, the methods given below are used.

Method of Calculating Waste Material

Insert an exact information in the regulator and curve the plate metal with the same density once. 

Fit the distance of the stopper on the back in accordance with data (raise or reduce) or adapt the data correctly.

You may input the refund value by increasing or decreasing it and at last have the value corresponding to the input one.

Factual require size – b = residue value.

Factual require size – residue value = insert value (b is the length between the setting sheet and the location where the bending tool edge touches the detail) 

If the factual require size equals 10 mm and b equals 9.2 the residue value equals 10 – 9.2 (= 0.8 mm), then the insert value will be 10 + 0.8 = 10.8 mm.

Insert 10 mm in size display regulator and 0.8 mm in the refund value. Both of them are permissive.

Method of Calculating Mold

After inserting data in the regulator take the measurement of the distance between  location and mold.

Decrease the space between the outer ridge of the lower die and groove center by the required size and by adding the material density as well as a ½ inside bending rate you can have the necessary sizes.

b = c – a

The actual required size equals b + ½ inside bending rate + sheet density, b is the space between the setting sheet and the location in which the bending blade edge touches the detail.

For instance, if the plate density t is 1mm, a =7 mm, c =15 mm, b will be 15 – 7 = 8 mm and the factual require size will equal 8 + 0.1 + 1 = 9.1 mm.

Method of Press Line

Insert exact data in the regulator. Then measure the longitude of the matter by adding density of the material  and ½ inner bending rate to the caliper. Thus, you can gain the needed size.

For instance, sheet density is 1mm, b is 9 mm, the actual require size is 9 + 0.1 + 1 = 10.1 mm

b is the space between the set sheet and the location where bending blade edge and detail meet.

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