Sheet Metal Punch And Die Clearance Formula

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Sheet metal punch and die clearance formula.

Clearance between punch and die. For example when using ø12 upper die and ø 12 25 lower die the optimal clearance is 0 25mm. Regardless of material thickness the recommended penetration of the punch into a mate slugfree die is 0 118 3 00. This balances the punching force and optimizes part quality and tool life top.

48 44 mm thickness of top plate 1 5 td 36 33 mm. Material thickness x 15 example. Material thickness t 1 mm blanking clearance c 3 4 t. Determine the punch and die clearance by formula.

The clearance between punch and dies is represented by the total difference which is one of the critical factors in the punching process. This provided an acceptable burr height and slug control. Thickness of punch holder plate 12 11 mm thickness of stripper plate 0 75 td. Die clearance is equal to the space between punch and pie when the punch enters the die opening.

T 1mm c 4 5 t. Its value can be calculated according to the following punch and die clearance formula. Figure 5 when the tooling has the optimal amount of die clearance the shear cracks join. Here s how to estimate die clearance required for punching steel and aluminium.

Enter information about your punch in row d. T 1 3mm c 5 8 t. 18 165 mm thickness of bottom plate 2 td. Each test result was recorded and a mathematical model was created.

Use it to calculate die clearance required for perforating metals plastics and more. For more information please read proper die clearance. Enter information about the stock you are punching in rows a b and c below. T 3 5mm c 8 10 t.

T 1 3mm c 6 8 t. A long time industry rule of thumb used by die makers for the clearance between the punch and the die button is 5 of the stock thickness per side.