How to choose the right tool when processing aluminum
Due to the special characteristics of aluminum, no matter what kind of machine tool is used, it is often unsatisfactory in terms of efficiency, life, and workpiece gloss. Therefore, how to choose the right tool and processing technology in the processing of aluminum has become a concern.
Let's first understand the processing characteristics of aluminum and aluminum alloy: aluminum has low strength, low hardness and high plasticity, which is suitable for plastic forming. However, when cutting, the deformation strengthening tendency is large, the knife is easy to stick, and it is difficult to process a smooth surface. Compared with pure aluminum, the strength and hardness of aluminum alloy are improved a lot, but compared with steel, the strength and hardness are low, the cutting force is small, and the thermal conductivity is good.
Because the aluminum alloy is soft and plastic, it is easy to stick to the knife during cutting, forming chip accumulation on the tool, and welding phenomenon may occur on the blade during high-speed cutting, which makes the tool lose its cutting ability and affects the machining accuracy and surface roughness. In addition, the thermal expansion coefficient of aluminum alloy is large, and the cutting heat is easy to cause thermal deformation of the workpiece and reduce the machining accuracy.
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