Teach you how to improve the quality of aluminum sheet pretreatment work
Aluminum products are widely used in automotive, construction and other industries, improve the quality of aluminum products is the fundamental survival of enterprises, aluminum materials in the air is very unstable, easy to produce with the naked eye is difficult to identify the oxide film. Due to the different processing methods of aluminum, such as casting molding, or by the continuous cutting of the plate directly from the sheet, or mechanical fine processing molding, or after the formation of different processes and then heat treatment or welding, the workpiece surface will appear Different states, different degrees of dirt or traces, for which in the pre-treatment process must be based on the actual situation of the workpiece surface selection of pre-treatment process. Pretreatment process need to pay attention to the casting molding is not all the surface are machined, without machining the surface of the casting process to form the formation of too thick oxide layer, and some also sanded sand, this time should first use the machine Processing or sandblasting method to remove the original part of the original oxide film, or after caustic washing and then processing, only in this way can not only clean the raw parts of the original oxide layer, but also to avoid changes in the size of machining parts tolerance. The same time as
Fine processing parts in the pre-treatment process need to pay attention to the problem: fine processing of the surface although the natural oxide film was only generated, easier to remove, but greasy heavy, especially in the hole and its surrounding, such parts must first through the organic solvent Cleaning, if the direct use of alkali washing is not only greasy heavy hard to remove the net, and fine processing surface can not afford a long time strong alkali corrosion, the results will affect the workpiece surface roughness and tolerance with the final may become a waste.
Aluminum products are widely used in automotive, construction and other industries, improve the quality of aluminum products is the fundamental survival of enterprises, aluminum materials in the air is very unstable, easy to produce with the naked eye is difficult to identify the oxide film. Due to the different processing methods of aluminum, such as casting molding, or by the continuous cutting of the plate directly from the sheet, or mechanical fine processing molding, or after the formation of different processes and then heat treatment or welding, the workpiece surface will appear Different states, different degrees of dirt or traces, for which in the pre-treatment process must be based on the actual situation of the workpiece surface selection of pre-treatment process.
