Die Ratio Sheet Metal

The bend angle is determined by the depth that the punch forces the sheet into the die.

Die ratio sheet metal.

Sharp corners on the. Deep drawing practice. 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. Both experimental and fem studies were accomplished.

It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. Learn more about bending. The calculated tonnage can be used for the selection of a machine such as a press brake to perform the bending operation. Bend radii minimum bend sizes.

Protocase tech tip video. 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 sheet is placed between the two and held in place by the backstop. 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.

Deep drawing of sheet metal is performed with a punch and die. 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. Figure 2 shows the basic pattern of metal flow when drawing a simple round cup. When cutting sheet metal the punch and die edges do not have a radius.

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. Quick video about bend radius watch more tech tip videos bend radii minimum bend sizes. 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. 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 die ratio may be entered to calculate the die opening which is typically 6 to 18 times the sheet thickness. The draw ratio is controlled by several basic factors. The punch is the desired shape of the base. Deep drawing the process.