Sheet Metal Punch And Die Clearance Formula

T 3 5mm c 8 10 t.

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. T 1 3mm c 5 8 t. 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 6 8 t.

For example when using ø12 upper die and ø 12 25 lower die the optimal clearance is 0 25mm. When the die clearance is too tight the punch process creates secondary cracks which raises the punching force and shortens tool life bottom. Its value can be calculated according to the following 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.

18 165 mm thickness of bottom plate 2 td. Thickness of punch holder plate 12 11 mm thickness of stripper plate 0 75 td. Clearance between punch and die. Material thickness x 15 example.

Determine the punch and die clearance by formula. Use it to calculate die clearance required for perforating metals plastics and more. Enter information about your punch in row d. T 1mm c 4 5 t.

Figure 5 when the tooling has the optimal amount of die clearance the shear cracks join. 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. 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. 48 44 mm thickness of top plate 1 5 td 36 33 mm.

Enter information about the stock you are punching in rows a b and c below. Material thickness t 1 mm blanking clearance c 3 4 t. Let s make holes faster. Here s how to estimate die clearance required for punching steel and aluminium.

This provided an acceptable burr height and slug control. Each test result was recorded and a mathematical model was created.