TD-382 NC Servo Tube End Closing Machine | Program-Controlled Closed-End Shape
How it differs from a hydraulic closing machine
On a hydraulic closing machine such as the TD-31040 the end shape comes from the tooling: one jaw set, one dome radius; a new radius means new tooling. On the TD-382 the forming rollers sit on a servo cross slide and follow a programmed path, so one roller set produces different dome radii, different flat areas and different hole positions; a product change is another program. The larger the tube, the thicker the wall, the more demanding the end shape and the more variants you run, the stronger the case for the TD-382.
How it works
The tube is clamped in a hydraulic rotating chuck and spun; X and Z servo slides move the forming rollers along the programmed path in stages, progressively closing the end into the set shape. Cold forming throughout: no weld seam, no heat-affected zone, thicker wall at the closure. Feed and speed can be set per path segment, so heavy-wall tube closes steadily.
End shapes
| Shape | Note | Typical use |
|---|---|---|
| Fully closed dome | Radius set by program | Stabilizer bar and torsion beam ends |
| Flat end | Flat diameter and edge radius set by program | Hydraulic cylinder tubes, industrial gas springs |
| Center hole | Hole diameter and surrounding flat set by program | Shock absorber cylinders, rod pass-through |
| Compound profile | Dome and flat segments in one program | To drawing |
Tube range
| Item | Spec |
|---|---|
| Tube OD | Large-diameter heavy-wall tube, up to Ø70 mm subject to end shape |
| Materials | Carbon steel, alloy steel, stainless steel; good ductility required, welded tube needs a sound seam |
| Tube length | Feeding and support arranged to the part drawing |
Machine specification
| Item | Spec |
|---|---|
| Forming drive | X / Z servo cross slide |
| Chuck | Hydraulic rotating chuck; collet and jaw set per tube OD |
| Control | Mitsubishi servo and PLC, touch screen; product programs stored and recalled, password levels, batch counter, fault self-diagnosis |
| Power | 220–415 V, 3 phase |
| Certification | CE |
Applications
- Automotive stabilizer bars, torsion beams, torsion bars: closing hollow bar ends
- Large shock absorber and damper cylinders: closed end with center hole
- Hydraulic and pneumatic cylinder tubes: flat heavy-wall ends
- Industrial gas springs and buffers
- Mixed-model tube shops: many end shapes on one machine
Track record
The TD-382 is used in a Japanese automotive supply chain for stabilizer bar closing, running in plants in Japan, Thailand and China; TONG DA supplies chucks, collets and slide parts as spares long term.
Also known as
NC closing machine, CNC tube end closing machine, servo spinning closer, servo end forming machine, stabilizer bar closing machine, torsion beam end closing machine.
FAQ
TD-382 or TD-31040?
Up to Ø40 mm, fixed end shape and high volume: TD-31040. Large diameter, heavy wall, varied or demanding end shapes, many variants: TD-382.
Does a new end shape need new tooling?
No. Radius, flat and hole are program parameters; only a change of tube OD needs a new collet and jaw set.
Can the closed end be gas-tight?
The one-piece weld-free end is used for gas-tight parts; a leak test is shown in the videos, and acceptance follows the customer’s specification.
Trial closing?
Yes. Send tube OD × wall × material × length and the closed-end drawing; we trial-close and return samples.
Capacity, lead time and price?
Email sales@tdco.com.tw with the part spec, end drawing and expected quantity; we reply with full details.
