The extrudable length variety of the aluminum alloy tube varies with the extrusion technique. The most outer diameter of the traditional perforated needle extrusion technique to extrude the aluminum alloy tube is 600-650mm, the minimal internal diameter is 5-15mm, and the minimal wall thickness is 2-5mm. Due to the electricity and stress of the piercing needle, the minimal internal diameter and wall thickness of the extruded aluminum alloy tube are significantly restricted. Among them, the minimal internal diameter and minimal wall thickness of the smooth aluminum alloy aluminum alloy pipe can be the decrease restrict of the above variety, and the tough aluminum alloy can also additionally take the top restrict. In addition, while the outer diameter of the aluminum alloy tube is large, the minimal wall thickness of the aluminum alloy tube is normally now no longer much less than 5% of the outer diameter of the aluminum alloy tube. Aluminum alloy pipes with an outer diameter of greater than 500mm are in general fashioned via way of means of opposite extrusion.
Using Confrom splitter die extrusion, it could shape aluminum alloy tubes with a thin, uniform wall thickness and small eccentricity as compared with punch pin extrusion. However, thinking about the first-rate of the welding seam, the most important aluminum alloy tube outer diameter that may be shaped at the equal extrusion system or the outer diameter of the aluminum alloy tube that may be extruded with the equal extrusion cylinder is bigger than that of the piercing needle extrusion method. small. The courting among the scale and minimal wall thickness of 6063 aluminum alloy aluminum alloy pipe extruded through a break up die is proven in Figure 3-2-3. Using Conform non-stop extrusion technology, it could produce aluminum alloy tubes with an outer diameter of 10 mm and a wall thickness of 0.five mm or much less. With the non-stop development of cold-rolled tube and drawn tube technology, the minimal wall thickness of aluminum alloy tube can attain 0.1-0.2mm or thinner. At present, the most diameter of the extruded pipe produced at the 350MN massive vertical extruder (opposite extrusion) can attain l500mm; at the 196MN horizontal extruder, it could attain l000mm. The minimal outer diameter of the extruded tube can attain 5mm. The most diameter of cold-rolled thin-walled pipes can attain greater than 120mm, and the minimal diameter is much less than 15mm. The diameter of the cold-drawn thin-walled tube is 3～500mm, and the massive thin-walled tube with a diameter of 3000mm may be rolled through the spinning method. With non-stop computerized manufacturing line or coil drawing method, aluminum alloy aluminum alloy tube with a duration of 1000mm may be produced.