South Korea： Chair Frame Manufacturer | DW38CNC4A2S Fully Automatic CNC Tube Bender

Customer Profile

A professional metal chair frame manufacturer in South Korea, producing office chairs and leisure metal-framed seating. They process carbon steel round tubes for chair frames.

Customer’s Challenge & Requirement

The customer’s chair frame design requires two different bending radii on one single tube part, and the large-radius bends need push bending function.

1. Their old tube bender only supports fixed single-radius rotary draw bending. They must split the part into two separate machining steps and change moulds manually, leading to long changeover time.
2. Manual mould switching causes inconsistent bending radius, poor surface smoothness on large arc bends, and unstable repeat accuracy for mass production.
3. The chair frame needs smooth continuous curves. Without push bending, the tube will deform and the arc will be uneven, affecting welding and final assembly.
4. Frequent manual adjustment increases scrap rate and limits production output.

Solution from JIANGSU CLAYTON MACHINERY GROUP

We recommended the DW38CNC4A2S 4-axis fully automatic CNC tube bender, equipped with push bending function and double stack tooling.

1. Double stack mould design supports two different bending radii in one program. No manual die change required for the two-radius chair frame parts.
2. Built-in servo push bending function: the machine synchronously pushes the tube during bending, achieving smooth large-radius curved arcs, maintaining tube roundness and eliminating surface wrinkles or flattening.
3. CNC servo control system can store multiple chair frame bending programs. Operators can call different product programs with one click for quick model switching.
4. High-precision angle control ±0.1°, stable repeatability for batch production of chair steel tubes.

Benefits Achieved

1. Eliminated manual die change for two-radius bending, cutting changeover time by over 70%.
2. Push bending delivers smooth and uniform large-radius arcs, tube cross-section keeps round, no collapse or wrinkling. The chair frame welding fit is greatly improved.
3. Consistent bending accuracy across all batches, scrap rate reduced significantly.
4. One machine completes all bends for the chair frame in one clamping, raising production efficiency and reducing labor cost.
5. Flexible for new chair model development, easy to program new bending parameters.

If you operate a chair manufacturing plant and have any technical questions regarding the new pipe bending machine, please feel free to contact me.