Sheet Metal Punch And Die Clearance Formula

Here s how to estimate die clearance required for punching steel and aluminium.

Sheet metal punch and die clearance formula.

This provided an acceptable burr height and slug control. For example when using ø12 upper die and ø 12 25 lower die the optimal clearance is 0 25mm. Material thickness x 15 example. Clearance between punch and die.

Determine the punch and die clearance by formula. Regardless of material thickness the recommended penetration of the punch into a mate slugfree die is 0 118 3 00. Die clearance is equal to the space between punch and pie when the punch enters the die opening. 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.

3 fs where fs shear force in tones td 2 422 cm td 24 22 mm thickness of punch holder plate 0 5 td. Each test result was recorded and a mathematical model was created. 18 165 mm thickness of bottom plate 2 td. Enter information about the stock you are punching in rows a b and c below.

Let s make holes faster. The clearance between punch and dies is represented by the total difference which is one of the critical factors in the punching process. T 1 3mm c 5 8 t. T 1mm c 4 5 t.

For more information please read proper die clearance. This balances the punching force and optimizes part quality and tool life top. 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.

48 44 mm thickness of top plate 1 5 td 36 33 mm. When the die clearance is too tight the punch process creates secondary cracks which raises the punching force and shortens tool life bottom. Material thickness t 1 mm blanking clearance c 3 4 t. Use it to calculate die clearance required for perforating metals plastics and more.

T 3 5mm c 8 10 t. Thickness of punch holder plate 12 11 mm thickness of stripper plate 0 75 td.