What factors affect the machining of carbon fiber panels?

Carbon fiber panels are manufactured by curing carbon fiber tow and epoxy resin at high temperatures. These panels are lightweight and highly durable, making them suitable for a wide range of applications, including medical bed frames, photovoltaic backsheets, and aircraft doors. It is evident that carbon fiber panels offer excellent weight reduction and high tensile strength, effectively meeting practical requirements.

The cost of carbon fiber panels is comparable to that of traditional metal sheet processing, as both involve machining processes such as grinding, turning, and milling. However, since carbon fiber is a brittle material, it places significant demands on the cutting tools, force applied, and processing time. The primary factors affecting the performance of carbon fiber panels during machining are the cutting tools and cutting speed.

1. Tool Selection: For machining carbon fiber products, cutting tools must be sharp to ensure effective penetration into the material, and the workpiece must be securely clamped. Additionally, different machining operations require different milling cutters; for example, drilling and edge milling require distinct tools.

2. Cutting Speed: The feed rate of the milling cutter must not be too fast, as excessive speed increases the risk of delamination in the carbon fiber sheet. The speed should typically be controlled around 2,000 rpm.

3. Cutter Wear: As cutters are used repeatedly, the cutting edge becomes dull due to chipping or notching. Continuing to use a dull cutter will result in a finished product with excessive burrs, which does not meet specifications.

If proper care is not taken during machining, the following issues are particularly likely to occur:

If the milling cutter is not sharp enough to cut cleanly, the carbon fiber sheet may delaminate, chip off in chunks, or tear. In such cases, the carbon fiber sheet will likely be scrapped. Additionally, a dull milling cutter can lead to a series of issues with CNC precision. As one might expect, this results in low machining accuracy during the actual process, which also causes the carbon fiber sheet to fail to meet practical requirements.

Furthermore, if machining methods are inaccurate during the machining process, it can lead to premature tool wear, resulting in higher production costs.