Requirements for aluminum sculpture need to pay attention to which a few?

, due to the different aluminum processing method using the casting aluminum engraving machine, or directly by the delay of pressure plate shear, or aluminum plate processing center processing molding, the surface will present different status, different degrees of dirt or marks, therefore in the pretreatment process, must choose according to the actual situation of the surface pretreatment process. ( 1) Fine processing parts need to be aware of problems in the pre-treatment process: fine machined part while natural oxide film on the surface of the first generation, clear more easily, but fat weight, especially inside the hole and the surrounding ( Due to the need of lubrication in the process of machining and add) , this kind of workpiece must first by the organic solvent cleaning, if with alkaline cleaning greasy weight is difficult to remove all, not only directly and precision machining surface cannot afford the alkali corrosion for a long period of time, the result will affect the workpiece surface roughness and tolerance to cooperate, could eventually become a waste. Aluminum processing center ( 2) Casting von berg systeme problems need attention in the pretreatment process. As not all surface after machining, casting without machining surface with a thick oxide layer formed in the casting process of, some still clip with sand, at this time should be first with machining or sand blasting method, first remove the parts of the original oxide film, or after caustic washing processing again, only in this way can not only remove all unprocessed parts of the original oxidation layer, and can avoid machining parts of tolerance size change. Aluminum processing center ( 3) After heat treatment or welding process of workpiece in the pretreatment process need to pay attention to the question: according to the technological requirements, artifacts into heat treatment or subject to organic solvent cleaning before welding process, free surface oil, but now can't do it, so form a layer of oil on sintering of coking on the surface of workpiece, this layer of coking content in organic solvents is difficult to remove all, if soaked in lye can cause local corrosion, pitting or cause uneven, seriously affecting the quality of the product. The author use the method of concentrated nitric acid soaking to soft the layer coking, soft object under coking in lye slightly again after cleaning can thoroughly cleanse.