Sheet Metal Punch And Die Clearance Formula

Material thickness x 15 example.

Sheet metal punch and die clearance formula. 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. Determine the punch and die clearance by formula. 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.

When the die clearance is too tight the punch process creates secondary cracks which raises the punching force and shortens tool life bottom. This balances the punching force and optimizes part quality and tool life top. Die clearance is equal to the space between punch and pie when the punch enters the die opening. T 3 5mm c 8 10 t.

T 1mm c 4 5 t. 48 44 mm thickness of top plate 1 5 td 36 33 mm. Material thickness t 1 mm blanking clearance c 3 4 t. 18 165 mm thickness of bottom plate 2 td.

Each test result was recorded and a mathematical model was created. Clearance between punch and die. 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.

Let s make holes faster. Enter information about the stock you are punching in rows a b and c below. 3 fs where fs shear force in tones td 2 422 cm td 24 22 mm thickness of punch holder plate 0 5 td. Here s how to estimate die clearance required for punching steel and aluminium.

Enter information about your punch in row d. For more information please read proper die clearance. Its value can be calculated according to the following punch and die clearance formula. T 1 3mm c 5 8 t.

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. T 1 3mm c 6 8 t.