Aluminum alloy die-cast products usually have some surface treatment. But many products have assembly requirements, this results in the need to machine the product after surface treatment.
For an aluminum die casting that has been surface-treated, machining is a very test of the supplier’s production capacity. The product will be scrapped due to a slight accidental bump on the surface. Therefore, when we are machining, the design of fixture and the milling path must be calculated repeatedly.
The picture shows the aluminum die-cast part, which was first treated with black electrophoresis. Then we machine the products after electrophoresis, so you can see the processed surface without black film. Often these machined surfaces are used for assembly.