Aluminum alloy tube is used more and more widely in our life. Today, I will introduce the common problems of aluminum alloy tube.

1. Contour distortion and distortion, fluctuation due to unreasonable mold hole design, too fast extrusion speed, improper lubrication of mold holes, is the guide device is incorrect or not installed guide device.

2. Bubbles and peeling are caused by excessive wear of the inner diameter of the extrusion cylinder, and the gap between the extrusion pad and the extrusion cylinder is too large; The extrusion cylinder and extrusion pad are stained with oil and sewage grade; Ingot surface has holes, trachoma, oil stains, ingot surface is too rough; Extrusion cylinder temperature and billet temperature are too high, filling too fast; The mold is lubricated during extrusion and for other reasons.

3. Aluminum alloy tube extrusion cracking because the temperature of extrusion billet is too high, the extrusion speed is too fast. The uniform treatment of billet is not good; Mold design is not reasonable, so that the flow rate difference between the center and the edge is too large.

4. The temperature of pits or pits is too high, and the extrusion speed is too fast or uneven; The working belt of the mold is stuck with metal and is not smooth; Die belt hardness is insufficient or the working belt is wide; The billet is too long.

5. Aluminum alloy tube unqualified size due to incorrect mold design or manufacturing defects; Improper mold maintenance; During extrusion process, the temperature of billet rises too high and the extrusion speed changes too much. Ingot billet length calculation is not accurate enough to fix the length.

6. Aluminum alloy tube delamination due to billet surface oil and dust; The billet surface quality is not good and there are large segregation tumors. Mold surface residue; Aluminum pipe manufacturer analysis is the billet itself has stratification, bubbles and other reasons.

7. Aluminum alloy pipe scratches and convex edges due to mold processing defects or ribs; The edge of the sharp blade of the mold is sharp and not smooth; Foreign matter on the working surface is not clean; Aluminum pipe manufacturer analysis is that the hard inclusions in the billet are blocked by die holes and other reasons.

8. Aluminum alloy tube performance is poor because the extrusion temperature is too low, the profile can not reach the quenching temperature; Artificial aging system is not suitable; Instrument out of control, furnace temperature is too high or too low; Ingot structure is not uniform, cooling air volume is insufficient.

9. Because the extrusion residue is too short, the extrusion gasket is not oiled or cleaned cleanly, the ingot surface is not clean, the length of the product cut layer is insufficient and the tail contraction caused by extrusion, the speed increases suddenly at the end of extrusion.