CNC Machining Of Carbon Fiber Composites

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Carbon fiber has the characteristics of high temperature resistance, friction resistance, conductivity, etc. that ordinary carbon fibers have. It also has softness and anisotropy that carbon materials do not have. It is often combined with a resin matrix to make carbon fiber composite materials. The carbon fiber board uses resin to impregnate and harden the carbon fibers arranged in the same direction to form a carbon fiber plate. It can effectively solve the problems of difficult construction of multi-layer carbon fiber cloth and large project volume. It has good reinforcing effect and convenient construction. Although carbon fiber composite materials are light in weight and high in strength, they are brittle and difficult to machine. In this article, the editor will talk about the CNC processing of carbon fiber composite materials.

Elements To Consider When CNC Machining Carbon Fiber

Carbon fiber has the characteristics of high temperature resistance, friction resistance, and electrical conductivity that ordinary carbon fibers have, but also has flexibility and anisotropy that carbon materials do not have. It is often compounded with resin matrix to make carbon fiber composite materials. Although carbon fiber composite materials are light in weight and high in strength, they are brittle and difficult to machine. In this article, I will talk about CNC machining of carbon fiber composite materials.

Tool material:Carbon fiber composite materials have high hardness, so high-hardness tools should be selected during machining, such as CVD diamond, cemented carbide, PCBN, and high-property ceramics.
Front and rear corners:According to the material properties, the rake angle of the tool should be selected as a smaller value to enhance the cutting strength and heat dissipation volume. However, at the same time, carbon fiber composite materials have high strength and toughness, and the cutting edge should be kept sharp. Generally, γ=° is selected; in order to reduce the friction and wear of the flank surface and prolong the service life of the tool, the flank angle is easy to choose. Larger value, but in order to ensure the strength of the cutting edge of the tool and not cause chipping, generally choose α=°
Number of teeth and helix angle:The number of tool teeth and the helix angle can be appropriately selected to be larger, so that multiple teeth can participate in cutting at the same time during the machining process. Generally, the number of teeth is Z=, and the helix angle β=°
Amount of knife eaten:The amount of tool wear during cutting is large. In order to ensure the surface quality of the machined surface, the axial non-layered cutting method is adopted, and the depth of cut a= mm. In order to avoid excessive cutting force, a is not easy to be too large.
Cutting speed and feed:In order to reduce the cutting force and improve the surface quality and cutting efficiency of the parts, high-speed cutting is adopted. The general speed is S= rpm, and the feed rate is F= mm. When machining carbon fiber composite materials, the specific parameters should be determined according to the actual situation.

Precision Machining For Carbon Fiber Composites

Further CNC cutting and drilling of carbon fiber parts blanks is to meet the accuracy requirements or assembly requirements of the parts. According to the material introduction, during the processing of carbon fiber reinforced composite materials, there is a relatively complex internal interaction between the matrix and the fibers. During the small batch machining process, fiber pullout or matrix fiber separation often occurs, and carbon fiber composite materials have high heat resistance. properties and wear resistance, which places high demands on equipment and process levels. Taking CNC machining as an example, subtle factors such as the strength, direction, time and temperature of tools and drills will affect the appearance and performance of finished carbon fiber parts. cause different impacts.

In the early stage, carbon fiber products also need to go through prepreg cutting, prepreg laying, component molding, carbon fiber component finishing (the center of this article), carbon fiber component painting, and carbon fiber component testing.

The assembled parts also need to undergo multiple rounds of inspections. On the one hand, it is necessary to ensure that the dimensional accuracy of key hole positions, points, lines, and surfaces and the appearance must meet standards such as clear lines, smooth surfaces, no random lines, and no burrs. On the other hand, It is also necessary to conduct on-site testing of samples to determine whether the performance of parts can meet application requirements.

Of course, on-site testing usually occurs during the proofing stage, and only when the proofing is qualified will it enter the mass production stage. In short, with the deepening application of carbon fiber parts in the industrial field, application objects are also placing higher and higher requirements on the performance of carbon fiber parts.

Usually, precision parts are processed using special ceramic engraving machines, which can effectively reduce costs and achieve high precision multi axis cnc machining. Be-Cu.com has independently developed a ceramic engraving and milling machine specially designed for ceramic machining, which has good protective performance and high processing accuracy. The ceramic engraving and milling machine strengthens the rigidity of the machine tool, and the vibration generated during processing can be reduced to a minimum, which ensures accuracy and improves processing efficiency. Moreover, the protective performance is enhanced for ceramic powder, which can completely prevent powder damage to the machine tool. BICHU Tech can also provide ceramic processing technology, with a highly skilled CNC machining and grinding team, R&D and custom processing of precision parts, etc.

How To Solve Problems In Carbon Fiber Composite Machining

Carbon fiber reinforced composite materials are widely used in aerospace, automotive and other fields because of their high specific strength, specific stiffness and obvious lightweight effect.

However, carbon fiber composite materials are difficult to process. During the processing process, fiber pullout or matrix fiber detachment is prone to occur, which aggravates the wear of cutting equipment, leads to a significant increase in operating costs of cnc machining equipment, and at the same time increases the surface heat of the workpiece, affecting Problems such as surface molding of composite materials and reduced performance. In addition, due to the characteristics of the material itself and the limitations of traditional processing techniques, it is currently difficult to achieve efficient mass production processing of carbon fiber materials. So how to solve the problems in the processing of carbon fiber composite materials? Below, China CNC manufacturer will analyze it for everyone.

Further CNC cutting and drilling of carbon fiber parts blanks are to meet the accuracy requirements or assembly requirements of the parts. During the processing of carbon fiber composite materials, fiber pulling out or matrix fiber detachment may occur. There are still many problems with using traditional CNC to process carbon fiber materials, such as low efficiency, low quality, etc. Carbon fiber composite materials are generally hard and difficult to process.

Aiming at the processing problems of carbon fiber composite materials, Bichu Tech optimizes the machine tool design and strengthens the stability of the machine tool. It specializes in ceramic engraving and milling machines customized for carbon fiber. The emergence of ceramic-specific engraving and milling machines makes up for the problems of traditional CNC machine tools such as poor rigidity, unreasonable structural design, and low protection levels. Ceramic-specific engraving and milling machines can process carbon fiber very well, effectively solving the problem of carbon fiber cnc machining accuracy and edge chipping. , fragmentation, damage to machine tools and a series of other problems. Be-Cu can also provide ceramic processing technology, with a highly skilled CNC processing and grinding team, R&D and custom processing of precision parts, etc.

Carbon fiber composite material is a new structural material with excellent performance. It combines the advantages of carbon fiber reinforced resin composite material (CFRP) and titanium alloy. It has wide application prospects in the aerospace manufacturing industry. However, its hole processing quality is poor and the tool Low durability is one of the main problems encountered in its application and processing in the aircraft manufacturing industry. Different china cnc machining methods, different tool materials, different drill tip shapes, and different drilling sequences have various impacts on the quality of hole processing and tool life. Not the same. Spiral milling, drilling from the titanium alloy side, using PCD materials or special drill tip angle carbide drills and other processes can significantly improve the hole processing quality and tool life.

China Be-cu Prototype Material Technology Co., Ltd. is a professional carbon fiber manufacturer with strong technical force. The drawings are made of fine carbon fiber CNC machining, the surface has no pinholes, no white spots, no scratches, and the quality is good.

Cnc-Drilling-Carbon-Fiber-Service-In-China

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%.