1, Aluminum and its alloys
Aluminum and its alloys are one of the most common materials in CNC machining. Aluminum has low density, high strength, good corrosion resistance, and is easy to cut, making it widely used in aerospace, automotive manufacturing, electronic products, and other fields. In CNC machining, the cutting force of aluminum alloy is relatively small, the cutting speed is fast, and efficient machining can be achieved. Meanwhile, the surface quality of aluminum alloy is easy to control and suitable for various surface treatments such as anodizing and spraying. However, aluminum alloys are also prone to thermal deformation during processing, and it is necessary to control the cutting speed and depth reasonably.
2, Stainless steel
Stainless steel is highly favored due to its excellent corrosion resistance, high temperature strength, and aesthetic appeal. Stainless steel is also a commonly used material in CNC machining. However, compared to aluminum alloy, the processing difficulty of stainless steel is much greater. Stainless steel has high hardness and good toughness. During cutting, the tool wears out quickly and is prone to work hardening, resulting in increased cutting force and temperature. Therefore, when processing stainless steel, it is necessary to choose suitable tool materials (such as hard alloys, ceramic tools, etc.) and optimize cutting parameters (such as reducing cutting speed, increasing cutting fluid, etc.) to ensure machining quality and tool life.
3, Copper and its alloys
Copper and its alloys are also common metal materials in CNC machining. Copper has excellent conductivity and thermal conductivity, and is easy to process into various shapes and sizes. In CNC machining, copper has good cutting performance, low cutting force, low cutting temperature, and is not prone to work hardening. Therefore, copper and its alloys are often used to manufacture electronic components, heat sinks, and other parts. However, the price of copper is relatively high, and burrs and burrs are prone to occur during the processing, requiring special attention to the control of processing accuracy.
4, Titanium alloy
Titanium alloy is a high-performance metal material with advantages such as high strength, low density, corrosion resistance, and high temperature performance. However, the processing difficulty of titanium alloy is extremely high, and it is known as the "king of difficult to process materials". In CNC machining, titanium alloy has high cutting force, high cutting temperature, fast tool wear, and is prone to work hardening and tool sticking. Therefore, special tool materials and cutting processes are required for processing titanium alloys, such as using coated hard alloy tools, adopting high-speed cutting technology, and increasing cutting fluid. Despite the difficulty of processing, the application prospects of titanium alloys in aerospace, medical equipment and other fields are still broad.
5, Other metallic materials
In addition to the common metal materials mentioned above, there are many other metal materials that are also suitable for CNC machining, such as brass, zinc alloy, magnesium alloy, nickel alloy, etc. These materials have their own characteristics and play important roles in specific application scenarios. For example, brass has good processing performance and decorative effect, and is often used to make decorations and artworks; Zinc alloys are widely used in fields such as toys and furniture due to their low cost, ease of casting and processing; Magnesium alloys are highly favored by the aerospace and automotive manufacturing industries due to their lightweight, high strength, and excellent shock absorption performance.
