Sheet Metal Punch And Die Clearance Formula

Die clearance is equal to the space between punch and pie when the punch enters the die opening.

Sheet metal punch and die clearance formula.

16 gauge and lighter 006 15 gauge thru 13 gauge 010 3 32 up to 5 32 1 64 3 16 up to 15 32 1 32 1 2 up to 23 32 1 16 3 4 up to 31 32 3 32 1 and over. Thickness of punch holder plate 12 11 mm thickness of stripper plate 0 75 td. 48 44 mm thickness of top plate 1 5 td 36 33 mm. T 1 3mm c 5 8 t.

T 1 3mm c 6 8 t. For more information please read proper die clearance. Figure 5 when the tooling has the optimal amount of die clearance the shear cracks join. Use it to calculate die clearance required for perforating metals plastics and more.

When the die clearance is too tight the punch process creates secondary cracks which raises the punching force and shortens tool life bottom. 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. The clearance between punch and dies is represented by the total difference which is one of the critical factors in the punching process. Each test result was recorded and a mathematical model was created.

For example when using ø12 upper die and ø 12 25 lower die the optimal clearance is 0 25mm. Determine the punch and die clearance by formula. 3 fs where fs shear force in tones td 2 422 cm td 24 22 mm thickness of punch holder plate 0 5 td. Enter information about your punch in row d.

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. Material thickness t 1 mm blanking clearance c 3 4 t.

This provided an acceptable burr height and slug control. T 1mm c 4 5 t. Its value can be calculated according to the following punch and die clearance formula. T 3 5mm c 8 10 t.

Material thickness x 15 example. Clearance between punch and die.