Die Ratio Sheet Metal

The press brake contains an upper tool called the punch and lower tool called the die between which the sheet metal is placed.

Die ratio sheet metal.

Deep drawing of sheet metal is performed with a punch and die. This can be done with the. The calculated tonnage can be used for the selection of a machine such as a press brake to perform the bending operation. Deep drawing practice.

Protocase tech tip video. Bend radii minimum bend sizes. When cutting sheet metal the punch and die edges do not have a radius. The bend angle is determined by the depth that the punch forces the sheet into the die.

It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii. The sheet is placed between the two and held in place by the backstop. The draw ratio is controlled by several basic factors. The mechanical properties of the metal primary its r value or thickness strain ratio which is its ability to flow plastically and resist thinning.

The punch is the desired shape of the base. The die ratio may be entered to calculate the die opening which is typically 6 to 18 times the sheet thickness. Learn more about bending. Both experimental and fem studies were accomplished.

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. 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 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.

Deep drawing the process. Figure 2 shows the basic pattern of metal flow when drawing a simple round cup. 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. 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.