Chair and table legs, stroller frames, motorcycle racks and coat stands need a clean look, no sharp edges and fast assembly. Typical operations are end closing (replacing plastic plugs and welded caps), grooving and beading (locating rings, retention), shrinking (tube-in-tube joints), notching (tube-to-tube welding) and punching or flattening.
| Operation | Machine | Note |
|---|---|---|
| Dome end closing | TD-31040 | Steel and aluminum tube roll-spun into a smooth dome, ready for plating or coating |
| Flat end closing | TD-21025 | Parts that need a flat end face |
| Grooving, beading, shrinking, roll cutting | TD-42001 SPM / TD-41860 | Operations combined to the product |
| Shrinking | TD-876 | Reduced end for sleeve joints |
| Notching, punching, flattening | Notching machine series | Tube-to-tube joints, lock holes |
TONG DA is both machine builder and contract processor. Fixed-design, high-volume customers usually buy; mixed-lot or new-product customers often subcontract first and buy once the market is proven.
Send the part drawing, tube OD × wall × material and quantity; TONG DA proposes a machine or a contract plan and makes samples.