The outline is processed according to the drawings of the aluminum parts, and the processing reference plane is milled. Rough milling (rough machining) is the previous process of fine milling. The cutting should be continuous during rough milling, and the amount of infeed is relatively large, which improves productivity, and the processing traces are also relatively coarse. For the size requirements, there is a margin for fine milling.
Fine milling the inner cavity, top surface and side surfaces of the aluminum parts.
Fine milling is a more precise processing according to the requirements of the technical request, and the amount of infeed and cutting is small. The purpose is to ensure the final dimensional accuracy control and surface quality of the aluminum part.
Sand blasting can remove burrs on the surface of the aluminum parts, make the surface into small pits, prepare for subsequent surface processing. It can form a pressure layer on the surface to improve the surface fatigue resistance and scratch resistance.
Aluminum itself is a material with strong corrosion resistance, but when exposed to air, it will form an oxide layer on the surface of aluminum, which will slowly eliminate its corrosion resistance for a long time. In addition, when it encounters acid, it will destroy the surface composition layer of aluminum. We need to oxidize again and add a layer of protective film on the surface to improve the corrosion resistance of the surface layer. After anodizing the surface of aluminum parts, the corrosion resistance, hardness, wear resistance, insulation and heat resistance have been greatly improved. The outer layer of aluminum’s anodized film is porous and easily absorbs dyes and colored substances, so it can be dyed and improve its decoration.
Powder coating is also another finishing method for many aluminium parts.
Silk screen printing and laser marking are the main method. Marking is of special significance to anti-counterfeiting of products. Silk screen printing belongs to stencil printing. When the printing plate is printed, the ink is transferred to the substrate (paper, ceramics, etc.) through the perforations of the stencil through a certain pressure to form an image or text. Laser marking is a marking method that uses a high-energy-density laser to locally irradiate the workpiece to vaporize or chemically react the color change of the surface material, thereby leaving a permanent marking. Screen printing can only be used for relatively flat products, if there are some irregularities, it can not be solved; and the laser marking machine can mark on round, uneven surfaces, irregular surfaces, and editing is processing immediately, which is impossible with silk-screen printing.