Radiator Tank Riveting: Leak-Proof Joints

How a radiator tank line is specified

The tank size, the rivet pattern, the flange geometry and the leak limit decide the line. Aluminium tanks leak at the joint, not at the rivet, so the flange and the clamp force matter more than the number of heads.

Station sequence

Tank and header loading, rivet feeding, riveting in a fixed pattern, then a leak test before discharge. Multi-head riveting is worth it when the pattern has more than four rivets, because the clamp force stays even across the flange.

What decides reject rate

• Clamp force: too little and the joint seeps, too much and the aluminium flange bows between rivets.
• Hole alignment: a rivet that pulls the flange into line leaves a gap on the other side.
• Flange flatness: a flange that is 0.3 mm out holds nowhere.
• Leak method: air under water finds a different set of leaks than a pressure decay test. Decide which one your customer uses.

What we need from you

• Tank and header drawings with the rivet pattern and pitch
• Rivet type and material, and the flange thickness
• The leak limit and the test method
• Output per shift and the tank sizes sharing the line

How the project runs

Quote from drawing, tooling design, build, then run-off with your own tanks in our plant in Chashan. Machines are built to your samples and drawings, and the drawing set is agreed before metal is cut.

Send a drawing to [email protected] or call +86-18123647785 to start a quote. Related lines: bearing assembly machines, car door lock assembly machines.