Finely crafted from the rough blank
The product obtained after die casting is usually a rough blank. Although the appearance is close to the design requirements, further precision machining is still required to achieve precise dimensions, tolerances, appearance, or functional requirements. The main processing steps are as follows:
Removing burrs and parting lines
Die castings may have flash (flash), parting lines, or burrs, which require trimming, grinding, or vibratory grinding to ensure appearance and safety.
Machining
CNC milling/turning: Corrects dimensions that are difficult to form directly from the die casting mold to ensure tolerance accuracy.
Drilling/tapping: Produces screw holes, locating holes, or threaded holes for connections.
Deep hole machining: Precision drilling or gun drilling is performed for deep holes required for heat sinks, water cooling channels, or structural components.
Precision surface finishing
Grinding/polishing: Improves surface roughness to enhance appearance and subsequent coating adhesion.
Inner hole turning/surface milling: Achieve strict fit accuracy, such as in bearing seats and sliding surfaces.
Secondary Precision Machining
Wire Cutting/Electrical Discharge Machining (EDM): Used for complex structures or locations difficult to machine directly.
Milling Detailed Structures: Processing thin grooves and fine holes that cannot be fully extruded by the die.
Dimensional Inspection and Correction
Post-machining measurements are required to ensure compliance with design tolerances, and corrections or adjustments are performed as necessary.
Pre-Surface Treatment
Before anodizing, sandblasting, powder coating, or electroplating, the surface must be refined to improve adhesion and aesthetics.