How should carbon fiber material products be precision machined?

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Compared with other materials, fiber materials have the advantages of light weight and thinness, and can be used to make products of various complex shapes without special processing. Carbon fiber refers to high-strength and high-modulus fibers with a carbon content of more than 90%. High temperature resistance ranks first among all chemical fibers. It is made of acrylic fiber and viscose fiber, which is oxidized and carbonized at high temperature. It is an excellent material for aerospace, auto parts manufacturing and other industries. Carbon fiber products have high hardness and high brittleness after molding, which leads to the need to pay attention to them in the later machining to prevent delamination and tearing. The performance of carbon fiber products is directly related to the processing process. Therefore, all carbon fiber companies have made great efforts in the production process, and have core competitiveness in terms of product performance. The processing of carbon fiber materials not only requires manual operation, but also requires the participation of advanced equipment.

Let's take a look at how to process carbon fiber machining.

Carbon fiber products are prone to delamination and tearing during machining, which will lead to a decline in the performance of carbon fiber products. Due to the relatively high strength of carbon fiber products, the cutting force is also higher, especially when processing carbon fiber products with relatively thick walls. . At this time, there will be a lot of heat around the hole, so it is recommended to choose cemented carbide or diamond drills during machining. Traditional twist drills are easy to cause debris accumulation. It is recommended to choose a drill with a central through hole and a cutting groove on the end face. This facilitates the removal of debris.

When drilling carbon fiber products, the shear stress of the cutter head along the linear velocity direction makes the surface of the carbon fiber material form a force of tearing and delamination without restraint, but as the drill goes deeper step by step, the drill will A certain taper is generated, and then there is a force perpendicular to the surface of the carbon fiber product, which can resist the force of tearing and delamination, so as to ensure the overall mechanical properties of the carbon fiber product.

When the bottommost fiber layer is drilled, the bearing capacity of the bottom is relatively low, and skirt wrinkles and burrs are prone to appear under the action of the axial direction. Therefore, in the process of correction, it is necessary to make the drill bit play. The effect of repairing light to ensure that the accuracy requirements of the holes meet the actual requirements.

Carbon fiber materials can roughly use the following four machining methods 

     1. Turning processing:

One of the more commonly used processing methods of carbon fiber materials is mainly used in the processing of cylindrical carbon fiber products to achieve predetermined dimensional tolerances. The carbon fiber material itself is relatively rigid, so cutting tools with higher hardness, such as cemented carbide, polycrystalline diamond, etc., need to be selected for turning processing, so as to avoid the cost increase caused by the tool being damaged too quickly and the performance of the carbon fiber material being affected.

     2. Milling processing:

It is often used in the processing of carbon fiber sheets and irregularly shaped carbon fiber products, and can be applied to carbon fiber products with high precision. Milling also has high requirements for cutting tools, because during the milling process, the milling cutter interacts with the carbon fiber material, which can easily lead to delamination and burrs of the carbon fiber material, reducing the overall performance of the carbon fiber.

     3. Drilling process:

Carbon fiber products are usually connected with parts of other materials. At present, the better connection method is to use both adhesive bonding and mechanical connection. Mechanical connection requires drilling or even tapping on the surface of carbon fiber products. Drilling requires a drill bit with high hardness. Under high-speed operation, it is necessary to complete the drilling requirements and avoid the risk of delamination of carbon fiber materials.

     4. Grinding process:

Fields such as aerospace, ships, and rail transit have relatively high precision requirements for carbon fiber products, so carbon fiber materials need to be milled multiple times before leaving the factory. Milling will polish the surface of carbon fiber products to be smooth and smooth, whether it is directly assembled or connected with other components, it can play a good role in paving the way.

 

     The machining methods of the above-mentioned carbon fiber materials are relatively simple in summary, but the actual operation is quite difficult. Goodwill Precision Machinery has been deeply involved in the precision machinery processing industry for 18 years. It has rich experience in material processing, including steel, copper metals, iron, aluminum, polymer materials and other special materials. Our machining services are mainly Involving industrial automation, aerospace, marine engineering equipment, unmanned driving, semiconductors, new energy, medical, communications, automobiles, optics, lighting, and other fields, providing customers with high-quality precision parts processing services.

Goodwill Precision Machinery Co., Ltd. is a company specializing in precision parts custom processing. Goodwill Precision Machinery started with precision machining, but not limited to precision machining. Goodwill Precision Machinery has more than 18 years of precision parts manufacturing and equipment OEM/ODM With experience, we have continued to OEM/ODM many equipment for many equipment companies at home and abroad, many of which are high-end automation equipment for the world's top 500 companies, involving industries such as agriculture, new energy, automobiles, semiconductors, and medical industries. Cooperative customers of many domestic semiconductor equipment manufacturers, we have a wide range of processing services, such as CNC turning, milling, optical grinding machines, sheet metal, slow wire, drilling and surface treatment, etc., based on an average annual experience of more than 20 years The national technical management team and high-end imported hardware equipment group, as well as the strict German and Japanese quality management system are escorted, and are continuously trusted and praised by customers. If you are looking for precision machining or equipment OEM, ODM manufacturers. We provide the most cost-effective solutions. If you want to know more about CNC precision machining, or need customized parts, you can visit the website of Dongguan Zhaoheng Machinery Co., Ltd. to contact us!