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.

T 1 3mm c 5 8 t. 48 44 mm thickness of top plate 1 5 td 36 33 mm. For example when using ø12 upper die and ø 12 25 lower die the optimal clearance is 0 25mm. Enter information about your punch in row d.

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. Clearance between punch and die. T 1mm c 4 5 t. Material thickness x 15 example.

Here s how to estimate die clearance required for punching steel and aluminium. T 1 3mm c 6 8 t. Material thickness t 1 mm blanking clearance c 3 4 t. This balances the punching force and optimizes part quality and tool life top.

Determine the punch and die clearance by formula. When the die clearance is too tight the punch process creates secondary cracks which raises the punching force and shortens tool life bottom. Thickness of punch holder plate 12 11 mm thickness of stripper plate 0 75 td. 18 165 mm thickness of bottom plate 2 td.

Regardless of material thickness the recommended penetration of the punch into a mate slugfree die is 0 118 3 00. Use it to calculate die clearance required for perforating metals plastics and more. 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.

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. For more information please read proper die clearance. Each test result was recorded and a mathematical model was created. Figure 5 when the tooling has the optimal amount of die clearance the shear cracks join.

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.