Reasons for Cracks in Aluminum Veneers

When using aluminum veneer, if there are cracks, what are the causes? As a manufacturer of aluminum veneer in Weifang, let me take you to understand the reasons for the cracks in aluminum veneer together!

In the process of producing aluminum veneer, it is necessary to use external forces such as extrusion to achieve product deformation and meet design requirements.

However, aluminum veneer is subjected to forces in three directions, and this manufacturing method can better weld the internal small cracks of aluminum veneer and reduce the influence of impurities. This has certain benefits for enhancing the plasticity of aluminum veneer. However, various cracks may still appear on the surface of aluminum veneer. In the production process of aluminum veneer, the deformed aluminum veneer will experience slow metal flow on the surface due to friction when passing through the hole direction, but the speed of the axial part of the flow will appear relatively fast, which can make the original unevenness of the metal inside the processed cylinder more obvious.

There is a difference in the flow velocity between the internal and external metal, but they are considered as a whole, so there must be internal forces balancing each other, which further increases the tensile stress value. If the shape of the mold mouth is complex, such as blades processed from aluminum veneer, due to uneven thickness and different resistance, the friction resistance is thin and the heat dissipation is fast, so the flow is slow, and the connection is often prone to cracking under tensile stress, especially for plastic materials processed from aluminum veneer.

When processing hollow workpieces with aluminum veneer, if there is a small gap between the imbalance between the convex and concave molds in the hole part, due to the high friction, the decrease in metal temperature is also large, and the metal flow is slow, transverse cracks may occur under tensile stress. The fast flowing part is restricted by slow flow due to additional stress. But it is caused by tangential tensile stress, so longitudinal cracks often occur.