Aluminum surface quality requirements: 1, the surface should be clean sheet supply rust-proof aluminum factory, does not allow cracks and oxidized debris. 2, the plate surface allows indentation, scratch, roll indentation and other defects, but its depth can not exceed the allowable negative deviation sheet and ensure minimum thickness. 3, the process allows clad slab off portion and the clad bubble cladding layer. 4. In addition to the plate surface to allow repair defects in the thickness difference range. Notes aluminum drilling a borehole, first, before drilling, we have to choose the right drill bit. Because aluminum materials are relatively soft, and has great sticky, so the best choice when selecting drill screw tap drills. Second, when the aluminum drilling because drilling Machine intensity is relatively large, direct drilling of aluminum, will direct drill into the bottom, it is prone to broken taps and aluminum interior rotten teeth occurs, resulting in aluminum diamond buckle pore size is too large. Third, when the drilling machine drilling, will produce relatively large shock force, so that the requirements of the staff must grasp the intensity of anti-rust aluminum supplier, holding his hands to steady drills rust-proof aluminum dealers, case in which chattering occurs if the hands, it is the diameter of the hole is too large prone. Especially with M3 tap, because this tap is very thin, so when the construction to be extra attention. Jinan rust-proof aluminum Which is good, rolls aluminum, rust-proof aluminum supplied by Alcoa Ltd. Jinan rolls. Jinan Heshun Aluminum Co. (www.jnhsly.com) Shandong Jinan, aluminum products leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Aluminum leadership in cis with the staff warmly welcome all inquiries negotiations to create a better future for aluminum rolls.