Die Ratio Sheet Metal

A sheet metal blank is placed on a die and pushed through by a punch similar to the standard deep drawing process.

Die ratio sheet metal.

For deep drawing without a blankholder thickness ratio should be at least 3. The die ratio may be entered to calculate the die opening which is typically 6 to 18 times the sheet thickness. Quick video about bend radius watch more tech tip videos bend radii minimum bend sizes. Bend radii minimum bend sizes.

The cutting surface of the die is the edge of hardened steel strips known as steel rule. Bendlength thickness 2 dieopening bf tons bf 2000 where die opening thickness die ratio kfactor 1 46 0 016 die ratio bf bending force. These steel rules are usually located using saw or laser cut grooves in plywood. Strojniški vestnik journal of mechanical engineering do 10 5545 sv jme 2016 4272 kw blanking.

The drawing ratio dr diameter of the blank diameter of the punch achievable is usually about 2 0 the limiting drawing ratio ldr depending on the sheet material thickness and micro structure. Protocase tech tip video. The drawing ratio is a measure of the severity of the drawing operation and is the ratio of the initial blank diameter to the punch diameter. The free online v bending force.

Simple calculator to calculate the v bending force of metal sheet from the given values. The effect of the thickness to die diameter ratio on the sheet metal blanking process where f s is the frictional stress k is the shear yield stress and m is the friction factor. Sheet metal parts with a minimum of 0 9mm to 20mm in thickness can be manufactured. The process requires sheet metal with a high thickness ratio to avoid wrinkling.

Bends in sheet metal are manufactured using sheet metal brakes. Calculate the required force to deep draw a piece of sheet metal based on the drawing ratio sheet thickness and the ultimate tensile strength of the material. Vol 63 no 9 2017. When designing parts for laser cutting one should not make holes smaller than the thickness of the material.

The bending force can be calculated from the sheet thickness die opening bend length and the ultimate tensile strength of the material. Steel rule die also known as cookie cutter dies are used for cutting sheet metal and softer materials such as plastics wood cork felt fabrics and paperboard. Calculate metal sheet bender. Enter the values for v bending.

With fine grain sheet metals controlled friction at the contact surface of the blank holder with the sheet the sheet with the die the punch to.