Sheet Metal Punch And Die Clearance Formula

Enter information about the stock you are punching in rows a b and c below.

Sheet metal punch and die clearance 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. 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. 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.

18 165 mm thickness of bottom plate 2 td. Die clearance is equal to the space between punch and pie when the punch enters the die opening. Clearance between punch and die. Let s make holes faster.

This provided an acceptable burr height and slug control. T 1 3mm c 5 8 t. Here s how to estimate die clearance required for punching steel and aluminium. 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 1mm c 4 5 t. Figure 5 when the tooling has the optimal amount of die clearance the shear cracks join. Material thickness x 15 example.

The clearance between punch and dies is represented by the total difference which is one of the critical factors in the punching process. Regardless of material thickness the recommended penetration of the punch into a mate slugfree die is 0 118 3 00. For example when using ø12 upper die and ø 12 25 lower die the optimal clearance is 0 25mm. For more information please read proper die clearance.

Material thickness t 1 mm blanking clearance c 3 4 t. Determine the punch and die clearance by formula. Each test result was recorded and a mathematical model was created. Enter information about your punch in row d.

T 3 5mm c 8 10 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.