Carbon fiber composite materials have higher strength than steel, lower density than aluminum, high elastic modulus, high temperature resistance, low temperature resistance, fatigue resistance, small thermoplasticity, high X-ray transmittance, and various forming methods. They are used in many industries. . In this article, the editor will talk about the hole making process of carbon fiber composite materials.
Due to the high hardness of carbon fiber material, the high-speed drill wears very fast, so carbide must be selected as the tool material. On the basis of referring to the selection of foreign cemented carbides, it is found that the selection of tungsten-cobalt cemented carbides is superior, because such cemented carbides have higher bending strength and toughness, which can reduce chipping during cutting. At the same time, it has good grinding processability and is suitable for grinding sharp edges.
Selection of drill geometry parameters:
When the apex angle is in the range of 100°~120°, the number of drilling holes in one sharpening can reach more than 100 holes, and the quality of the holes is also relatively good.
Rear corner. It has a great influence on the drilling performance. When the relief angle is small, the axial force of the feed increases, and it is easy to generate heat; when the relief angle is large, the axial force of the feed decreases, the cutting is lighter, and the drill bit’s Durability will also increase. However, if the clearance angle is too large, the strength of the cutting edge will also be weakened, and it is generally controlled at 15°~25°.
Helix angle. Since the helix angle is actually the rake angle of the drill in the axial section, the larger the helix angle, the sharper the cutting edge and the lighter the cutting. The test results show that the helix angle of 25°~30° is better. For smooth chip evacuation, the spiral groove should also be polished.
Drilling process parameters:
The drilling process test shows that controlling the feed speed is very important to ensure the quality of the hole. When the feed speed is 0.01mm/r, the axial force is 851.71N, and when the feed speed is 0.07mm/r, the axial force is 851.71N. The force increases to 277.24N. Therefore, for drilling carbon fiber composite materials, it is generally better to use low feed and large rotation speed.
China Be-cu Prototype Material Technology Co., Ltd. has strong technical force, complete carbon fiber machining equipment and experienced staff, and can do fine hole machining according to customer drawings, including countersunk holes, threaded holes, etc. In addition, we also have the strength to independently develop modified carbon fiber composite materials, which makes it widely used in more fields.
ISO 9001 certified. BE-CU Prototype Offering CNC machining carbon fiber and other manufacturing services for carbon fiber marterial. Various capabilities include notching, labeling, drilling carbon fiber, grinding, laser cutting carbon fiber, finishing, plating, marking, CNC milling carbon fiber and turning carbon fiber.We stock high quality 3k carbon fiber sheet in a variety of thickness, types and finish. Its a great material used in applications where light weight and strength are needed such as drones. Unlike other workshops, we have no min order and are often filling orders with a single part. We also don’t make you pay for the full sheet and you only get charged for what is used. With a large selection of material, you should find everything you need to make your project come to life. We are also able to handle larger production runs and provide a competitive pricing. If we don’t have the material or finish you require, we are more the willing to look at bringing it in for you.
What Is Carbon Fiber?Carbon fiber is made of polyacrylonitrile (PAN) (or pitch, viscose) and other organic fibers by carbonization (removal of most elements except carbon) by pyrolysis method under inert gas at high temperature above 1,000 °C. Inorganic polymer fibers with a carbon content of more than 90%.