Punching Sheet Metal Thickness

Sheet and plate generally refers to rolled metal with a high surface area to volume ratio.

Punching sheet metal thickness.

A deflecting punch requires more tonnage to break through the material and again increases distortion. If punching one square hole in the 3mm thickness low carbon steel plate side length 20mm you will get. And the type of metal being punched harder metals are more difficult to punch. Sheet metal punching via ironworker is a slow process.

Most of the sheet metal cutting processes discussed can be performed. F 0 7 t l u t s displaystyle f 0 7tl uts where t is the sheet metal thickness l is the total length sheared perimeter of the shape and uts is the ultimate tensile strength of the material. Shear strength 0 3447kn mm 2. The punch force required to punch a piece of sheet metal can be estimated from the following equation.

For example when punching a round hole it is generally recommended that the minimum diameter of the hole should be larger than the thickness of the metal. Generally capabilities of of 0 9mm 20mm in thickness are able to be manufactured from sheet 3mm or plate 3mm but this tolerance depends mainly on the part. Typically ironworkers are used for thicknesses greater than 1 8. The thickness of the metal being punched thicker metal is harder to punch neatly.

82 728 kn 9 81 8 43 ton. When considering sheet metal thickness a single sheet with punches holes is a good rule of thumb. Punch force kn 80 x 3 x 0 3447 82 728 kn convert into tonnage. 2 to 1 for stainless 1 to 1 for carbon steel 0 75 to 1 for aluminum.

This is because the stripping action of the punch coming out of thin materials causes the sheet metal to deform. 1 2893 7 3 2812 7 1 2 2576 6 5 2656 6 7 3 2391 6 1 2294 5 8 2500 6 4 4 2242 5 7. The die clearance ideally increases as thicker sheet metal is punched but in practice some standard dies can be used for a range of materials. Perimeter 20 4 80mm.

Also watch out for punch deflection especially if you re working with small hole diameter to material thickness ratios. Gauge sheet steel.