The object of this study was simulating and optimizing the cold forging process for a silent block bush steel sleeve. A block bush consists of two concentric steel sleeves with rubber securely bonded between them to fill up the void and absorb torsional, axial and radial loads. Silent block bushes are typically used in suspension systems in the automotive industry to absorb load and minimize suspensions. A silent block bush is traditionally used in the linkage system of a car suspension, in railway carriages and in agricultural machinery.
There were multiple objectives attached to this study. Specifically:
Setting up the simulation environment could not have been easier. Transvalor ColdForm comes with a large reference database containing the properties of more than 200 steel, aluminum, brass and titanium materials. In fact, the material used in this study, CB4FF steel – UNI 7356, 1974 – at 20?C was already included and we, therefore, did not need to input any material properties.
Furthermore, the elasticity and plastic strain of the material were both accounted for by ColdForm; this enabled accurate residual stress and geometrical dimensions to be obtained after forming.
The simulation also took into account the heat transfer between the work piece and the dies, as well as the elastic spring back at each forging stage.
The objectives above were all met by the simulation, and the results are best expressed in the words of Gianfranco Marcandella, R&D technical lead at Altia Fontanafredda S.r.l.
Real and simulated workpiece at the end of each forging stage, before the elastic spring back (left); close-up after the first (top-right) and fifth forging stages (bottom-right)
In High Pressure Die Casting production it is necessary to keep the die temperature within a certain specified range
die-casting magma metal-process-simulation
This type of highly-defined model provides valuable outputs: the contact analysis provides detailed information about the pressure and friction between the parts, which is useful for estimating wear
automotive multibody recurdyn