Die Ratio Sheet Metal

A 1 degree tolerance on all bend angles.

Die ratio sheet metal.

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 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. Strojniški vestnik journal of mechanical engineering do 10 5545 sv jme 2016 4272 kw blanking. A sheet metal blank is placed on a die and pushed through by a punch similar to the standard deep drawing process.

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. 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. Calculate metal sheet bender. The bending force can be calculated from the sheet thickness die opening bend length and the ultimate tensile strength of the material.

It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. Enter the values for v bending. Bendlength thickness 2 dieopening bf tons bf 2000 where die opening thickness die ratio kfactor 1 46 0 016 die ratio bf bending force. The cutting surface of the die is the edge of hardened steel strips known as steel rule.

Protocase tech tip video. Bend radii minimum bend sizes. The process requires sheet metal with a high thickness ratio to avoid wrinkling. When designing parts for laser cutting one should not make holes smaller than the thickness of the material.

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. Sheet metal parts with a minimum of 0 9mm to 20mm in thickness can be manufactured. The free online v bending force. Quick video about bend radius watch more tech tip videos bend radii minimum bend sizes.

For deep drawing without a blankholder thickness ratio should be at least 3. 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. The die ratio may be entered to calculate the die opening which is typically 6 to 18 times the sheet thickness. Bends in sheet metal are manufactured using sheet metal brakes.

Simple calculator to calculate the v bending force of metal sheet from the given values.