來源：http://www.mallhometrade.com 發布時間：2021-07-06 16:14:01
Silicon has corrosive effect on cemented carbide. Although the aluminum alloy with more than 12% Si is generally called high silicon aluminum alloy, and the diamond tool is recommended for color coated aluminum coil, this is not certain. The damage force of the tool is gradually increased with the increase of silicon content. Therefore, some manufacturers recommend the use of diamond tools when the silicon content exceeds 8%.
The aluminum alloy with silicon content between 8% and 12% is a transition zone, which can use both general cemented carbide and diamond tools. However, the use of cemented carbide should be PVD (physical coating) method, does not contain aluminum, the film thickness of the tool is small.
PVD method and small film thickness make it possible for the tool to stick to a sharp cutting edge (otherwise, in order to avoid the abnormal growth of the film at the edge, it is necessary to passivate the edge sufficiently, and the cutting of aluminum alloy will not be sharp enough), and the film data containing aluminum may cause the affinity effect between the blade film and the workpiece data and damage the combination between the film and the tool matrix. Because the superhard coating is mostly composed of aluminum, nitrogen and titanium, the edge may collapse due to a small amount of peeling off of cemented carbide substrate with the film peeling off.
It is recommended to use one of the following three types of tools:
1. Uncoated ultrafine cemented carbide tools
2. Cemented carbide tools without aluminum coating (PVD), such as tin, tic, etc
3. Using diamond tools
It is generally recommended to use 2 teeth, with large rake angle and rake angle (e.g. 12 ° to 14 ° including rake angle of end teeth).
If only general milling face, can use 45 ° main deflection angle of indexable face milling cutter, with special processing aluminum alloy blade, the effect should be better.
Alumina was used in the laboratory in 1808 and became aluminum material by electrolysis. In 1884, it was used as building materials on the spire of Washington Monument; The information of aluminum alloy synthesized by various metal elements has been widely used in all aspects of the construction industry. Thickness of common aluminum alloy sheets: the thickness of high-grade metal roof (and curtain wall) system is generally 0.8-1.2mm (while the traditional thickness is generally ≥ 2.5mm)