Sheet Metal Forming Pressure

Bending is the forming of sheet metal by application of force which exerts pressure on a certain length of material either at a certain point or linear as an evenly distributed weight.

Sheet metal forming pressure.

Under pressure the rubber and sheet metal are driven into the die and conform to its shape forming the part. Calculate the required force to bend a piece of sheet metal using wipe bending also called edge bending. Reference module in materials science and materials engineering 2016. With this process more complex parts can be created in a shorter time frame.

In this process the sheet is held between a wipe die and pressure pad while a punch presses against the edge of the sheet. It also must be strong enough to satisfy the part s fit and function. The rubber pads can have a general purpose shape like a membrane. This applied force is also called the bending moment.

The metal being formed must have the ability to stretch and compress within given limits. F ys uts 2 a. This balance between formability and strength often is hard to achieve. The bending force can be calculated from the sheet thickness bend length die edge radius punch edge radius and the ultimate tensile strength of the material.

Ultimate tensile strength psi. In a deep draw operation autoform will automatically as in 1. Successful sheet metal forming relies heavily on the metal s mechanical properties. Rubber pad forming rpf is a metalworking process where sheet metal is pressed between a die and a rubber block made of polyurethane.

In this process the metal is placed on a die but instead of a punch high pressure fluid is used to shape the sheet. Above increase the binder pressure to ensure the sheet material is always flat and not wrinkling under the binder. F stretch forming force lbs ys material yield strength psi uts ultimate tensile strength of the material psi a cross sectional area of the workpiece in2 forces needed to bend sheet metal. The force of the bending moment determines the degree of deformation.

Die edge radius in. Stress distribution through the thickness of the part. A controlled pressure distribution over part surface during forming can be used to control the sheet thickness and postpone localized necking. Punch edge radius in.

The binder pressure may increase during the stroke and the result can be interrogated in every detail at any step of the forming process.