Why Are Stabilizer Bars Going Hollow? Tube End Processing and Closing for Stabilizer and Torsion Bars
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Stabilizer bars (anti-roll bars), torsion bars and torsion beams were traditionally made from solid bar. To save vehicle weight, more and more models now use hollow steel tube, which makes tube end processing and closing a key operation.
What the tube ends need
- Closing: seals the end against moisture and debris that cause internal corrosion, and keeps the end rigid.
- End forming: shapes the end to connect to links or the chassis, per vehicle model.
- Related operations: cutting, inner drilling, expanding, upsetting and end turning, as the part requires.
Closing requirements
- Large diameters and thick walls are often beyond a standard hydraulic closing machine.
- End shapes differ by model, so changeovers must be simple.
- Cold spin closing forms the end in one piece, with no weld seam or heat-affected zone.
TONG DA equipment
| Equipment | Description |
|---|---|
| TD-382 CNC servo closing machine | Servo cross-slide drives the forming roller; closing path set by program, product change by recipe |
| Stabilizer bar line equipment | Inner drilling, expanding, upsetting, end turning and closing, planned to the part |
Why TONG DA
- TONG DA has designed and built tube processing machines since 1989 and runs contract processing on its own machines.
- Tooling is designed to your tube and drawing; sample trials available.
- CE certified; machines sold to the USA, Germany, Turkey, the UK, India, China and more.
FAQ
How many end shapes can one TD-382 make?
The end shape is set by program – change the program and tooling for each product.
Can I buy only the closing machine?
Yes, or we can plan the operations before and after it.
How do I request a quotation?
Send the tube OD, wall, material, end drawing and requirements to sales@tdco.com.tw and we will reply promptly.