Innovation Technology CNC Tube Bending: Forming Ergonomic Chair Frame Hollows

This content discusses Technological Innovation in the furniture and metal manufacturing industry: the process of forming hollow tubes into intricate chair frames using an Automatic CNC Tube Bending Machine. Traditional methods often require expensive dies and tooling and result in tube distortion or wrinkling. This innovation ensures precise chair geometry that is highly repeatable.

The core innovation lies in the Multi-Axis CNC Tube Bending Machine. This machine not only controls the bending angle (Y-axis) but also the material's rotation between bends (B-axis) and the distance between bends (X-axis). The simultaneous control of these axes allows for the forming of chair frames with complex 3D bends, such as organically merging chair backs and legs. The transition from manual to CNC bending drastically minimizes material scrappage.

The precision technology that guarantees the integrity of the hollow section is the Mandrel Use and Automatic Springback Compensation. To prevent the hollow tube from flattening or wrinkling in the bend area, a flexible internal mandrel (steel rod) is used inside the tube during the bending process. Furthermore, because every material exhibits a springback effect (a tendency to return slightly to its original shape), modern CNC machines use sensors to measure and automatically compensate for this springback, ensuring the final bend angle matches the design specifications.

Overall, this innovation results in Flexible Chair Design, Consistent Structural Quality, and Mass Production Efficiency. With CNC Bending, the industry can easily switch from one chair design to another by loading a digital program, eliminating the need for time-consuming physical tooling changes. This is key to successfully producing modern furniture that emphasizes curved aesthetics and ergonomics.

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