Sheet Metal Punch And Die Clearance Formula

When the die clearance is too tight the punch process creates secondary cracks which raises the punching force and shortens tool life bottom.

Sheet metal punch and die clearance formula.

Min service life of dies. Use it to calculate die clearance required for perforating metals plastics and more. Here s how to estimate die clearance required for punching steel and aluminium. Clearance is the amount of extra space required in the hole of the die to allow the punch to pass through to punch a hole in the material.

Let s make holes faster. This balances the punching force and optimizes part quality and tool life top. The clearance between punch and dies is represented by the total difference which is one of the critical factors in the punching process. Clearance is determined by the type and thickness of the material being punched.

Enter information about the stock you are punching in rows a b and c below. Punch and die clearance. 20 25 long service life of dies. Let s make holes faster.

Determine what size die you need for your punching application. Components will indicate the amount of clearance and whether the punch and die have optimum cutting clearance or excessive clearance or misalignment. Hydraulic hole punches our strongest punch this tool has 35 tons of force to punch through tough materials such as bus bars railings and i beams. Generally there have two methods by experience and by formula.

Enter information about your punch in row d. Unipunch custom metal fabrication c frame punching units will increase throughput reduce changeover time and enhance overall quality. 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.

Material thickness x 15 example. Cutting die clearances 2 1 clearance equation the ideal clearance can be calculated using the following formula 10 tmax where c 0 005 accurate components 1698. 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 experience.

Slide thin sheets of material into the included die block then punch an inner and outer hole to create a shim or washer.