Die Ratio Sheet Metal

The calculated tonnage can be used for the selection of a machine such as a press brake to perform the bending operation.

Die ratio sheet metal. When cutting sheet metal the punch and die edges do not have a radius. The press brake contains an upper tool called the punch and lower tool called the die between which the sheet metal is placed. Protocase tech tip video. 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.

Deep drawing of sheet metal is performed with a punch and die. Deep drawing practice. Both experimental and fem studies were accomplished. Figure 2 shows the basic pattern of metal flow when drawing a simple round cup.

Sharp corners on the. The die ratio may be entered to calculate the die opening which is typically 6 to 18 times the sheet thickness. Deep drawing force calculator 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. The sheet is placed between the two and held in place by the backstop.

The draw ratio is controlled by several basic factors. The punch is the desired shape of the base. In this study four different thickness to die diameter ratios t dm 1 5 t dm 1 10 t dm 1 30 and t dm 1 50 with five different clearances 1 3 5 10 and 20 of thickness were used to blank 2 mm thick round workpieces made of aisi 304 stainless steel. The mechanical properties of the metal primary its r value or thickness strain ratio which is its ability to flow plastically and resist thinning.

Bf safetyfactor kfactor ultimatestrength 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 free online v bending force calculator. 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. Learn more about bending. Bend radii minimum bend sizes.

This can be done with the. Quick video about bend radius watch more tech tip videos bend radii minimum bend sizes. 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. Deep drawing the process.