Direct Screwing into Carbon Fiber Reinforced Plastics (CFRP)

Direct screwing into carbon fiber reinforced plastics for strong, removable joints in modern lightweight construction applications

Direct screwing into carbon fiber reinforced plastics (CFRP) enables the cost-effective and reliable production of removable joints in highly loaded composite structures. Unlike adhesive bonding, this process eliminates curing times, additional fastening elements, and extensive post-processing. Specially developed thread-forming screws create a high-strength thread directly in the carbon fiber reinforced laminate during installation. By forming the thread directly within the composite material, a fast, repeatable, and assembly-friendly joining solution is achieved. At the same time, the advantages of modern lightweight and hybrid design concepts are fully maintained.

Our Solutions for Direct Screwing into Carbon Fiber Reinforced Plastics

baier & michels offers innovative direct screwing systems specifically developed to meet the requirements of CFRP components, composite structures, and modern lightweight construction applications.

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Secure Connections in CFRP Components and Composite Materials

Direct screwing into carbon fiber reinforced plastics (CFRP) enables the creation of high-strength threaded joints directly in composite materials, without the need for additional threaded inserts or bonded studs. The screw system displaces the material in a controlled manner and forms a precise internal thread within the composite laminate. This process offers significant advantages, particularly for CFRP components, fiber-reinforced laminates, and complex hybrid structures, in terms of assembly time, process reliability, and serviceability. Since the joint remains removable, components can be maintained, replaced, or recycled when required. At the same time, the optimized screw geometry minimizes harmful radial stresses, reducing the risk of delamination within the laminate structure.

Typical Applications of Our Direct Screwing Solutions for CFRP

  • Automotive industry
  • Sports and leisure industry
  • Mechanical and plant engineering
  • Electronic enclosures and lightweight structures
Wherever high strength, low weight, and cost-effective assembly are required, direct screwing in CFRP offers decisive advantages.

Corrosion Resistance and Material Compatibility as a Technological Advantage

When fastening carbon fiber reinforced laminates, electrochemical influences must be considered alongside the mechanical requirements. Due to the electrical conductivity of carbon fibers, an electrochemical potential difference can arise between the screw and the composite material. Under unfavorable environmental conditions, this may lead to galvanic corrosion. For this reason, b&m relies on carefully matched material concepts and high-quality screw materials such as austenitic stainless steel to ensure excellent corrosion resistance and long-term functional reliability. This approach optimally combines the benefits of fiber-reinforced composite materials with those of metallic fastening elements.

Our Solutions for Direct Screwing into Carbon Fiber Reinforced Plastics

Thread-forming screws for carbon fiber reinforced plastics, composite laminates, and advanced fiber-reinforced composite materials. Engineered for maximum process reliability, reduced delamination risk, and high-strength, removable joints in lightweight construction applications.

In direct screwing, the thread is formed directly within the composite material during assembly. No additional threaded inserts or bonded studs are required. This creates a cost-effective and removable fastening solution.

A specially developed thread-forming screw displaces the material in a controlled manner and creates a high-strength internal thread in the carbon fiber reinforced laminate. The process is chipless and ensures consistent, repeatable assembly results.

The joint is immediately load-bearing, removable, and requires no curing time. In addition, extra process steps are eliminated, reducing both assembly effort and production costs.

Yes. Due to the electrical conductivity of carbon fibers, an electrochemical potential difference can develop between the screw and the component. However, the risk of galvanic and electrochemical corrosion can be effectively minimized through the use of suitable materials and surface treatments.

Modern screw geometries are designed to minimize the radial stresses generated during installation. This reduces the risk of delamination in the fiber laminate and helps maintain the structural integrity of the component.

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