FDS (Flow Drill Screw) is a specialized fastener engineered for joining metal sheets, with its connection process known as the FDS Hot-Melt Thread Forming Process.
Core Working Principle
The FDS screw transfers high-speed rotational motion from the servo motor of FDS equipment to itself via the central tightening shaft. This rotation generates friction and heat with the target metal sheets; under intense axial pressure, the sheet material undergoes plastic deformation. The screw then extrudes the material to create a cylindrical through-hole, rolls internal threads automatically, and finally achieves a secure sheet connection.
Key Process Advantages
• Eliminates the need for pre-drilling, significantly boosting production efficiency and reducing costs.
• Enables one-sided drilling and joining, making it ideal for applications with limited space.
• Compatible with various materials, supporting the connection of same or dissimilar metals (e.g., steel, aluminum).
• Removable design allows for easy maintenance and repeated use of both the screw and workpieces.
• Delivers high connection strength, excellent sealing performance, and strong vibration resistance.
Typical Application Fields
• Automotive Manufacturing: Widely used in new energy vehicle battery pack (upper cover to case connection) and underbody shield to subframe fastening.
• Home Appliance Industry: Applied in assembling outer casings of various electrical appliances (e.g., washing machines, refrigerators).
• Aerospace Sector: Utilized for connecting structural components of aircraft, where reliable and lightweight joints are critical.
