Part six: peeling, Aluminum extrusion defect analysis and quality control method

Part six: peeling, Aluminum extrusion defect analysis and quality control method

Peeling, Aluminum extrusion defect analysis and quality control method

Peeling

This is a phenomenon of part falling off between the skin metal and the base metal of aluminum alloy extruded product.

The main causes of peeling:

1. When it is in the extrusion process, the inner wall of the extrusion container is stuck with the lining formed by the aluminum metal, and the cleaning is not enough;

2. The extrusion container and dummy block are not properly matched, and the inner wall of the extrusion container is lined with the residual metal;

3. Extrusion by lubricating extrusion container;

4. The die hole with the metal or mold working land is too long.

Solutions for peeling:

1. When changing the alloy, clean the extrusion container thoroughly when extrusion;

2. Reasonably design the fit size of the extrusion container and the dummy block, and often check the size of the tool, and the dummy block should not be out of tolerance;

3. Clean the residual metal on the mold in time.

4. The surface of the tool and billets should remain clean, smooth and dry;

5. Always check equipment and tool to prevent excessive temperature and speed;

6. Strictly implement the process procedures and systems;

7. Reasonably design and manufacture the mold;

8. Strict operation, correct cutting of residual material and complete exhaust.

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