What are the manufacturing requirements of aluminum profile extrusion process die?

Manufacturing requirements of aluminum profile extrusion process die

1. Because the working conditions of aluminum alloy extrusion die are very bad, it needs to bear the effects of high temperature, high pressure and high friction during extrusion, so it is required to use high-strength heat-resistant alloy steel, and the melting, casting, forging, heat treatment, electrical machining, mechanical machining and surface treatment of these steels are very complicated, which brings a series of difficulties to die processing.

2. In order to prolong the service life of the aluminum extrusion die and ensure the surface quality of the product, the roughness of the working area of the die cavity is required to reach 0.8-0.4μm, and the roughness of the die plane is below 65438 0.6 μ m, so special polishing technology and polishing equipment are needed when making the die.

3. Due to the development of extruded products in the direction of high, precision and sharp, the wall thickness of some profiles and pipes is required to be reduced to about 0.5mm, and the tolerance of extruded aluminum products is required to reach 0.05 mm. In order to extrude this ultra-high precision product, the manufacturing accuracy of the die is required to reach 0.0 1mm, which cannot be manufactured by traditional technology. Therefore, it is necessary to update the technology and adopt new special equipment. For example: CNC lathes, CNC machining centers and advanced high-precision machining equipment such as wire cutting.

4. The section of aluminum profile is very complicated, especially the ultra-high precision thin-walled hollow aluminum profile and porous hollow wallboard aluminum profile, which need to adopt special extrusion die structure. Many special-shaped cavities are often opened in a mold at the same time, and the thickness of each section changes dramatically, the related dimensions are complex and there are many rounded corners, which brings a lot of trouble to the processing and heat treatment of the mold.

5. Aluminum profile extrusion products have many kinds, small batch and frequent die changing, which requires strong die adaptability. Therefore, it is required to improve the production efficiency of mold making, shorten the mold making cycle as much as possible, quickly change the mold making procedure, accurately process qualified molds according to the drawings, and reduce the workload of mold repair to a lower level.

6. As the application range of aluminum profile extrusion products is getting wider and wider, the specification range is also getting wider and wider. There are both small dies with the overall size of 100mm×25mm as light as a few kilograms, and large dies with the overall size of 1800mm×450mm weighing over 2000kg. There are small extrusion shafts as light as several kilograms, with a total size of 65 mm× 800 mm, and large extrusion cylinders with a total size of 2,500 mm× 2,600 mm, weighing more than 100 ton ... The huge differences in mold specifications and quality require completely different manufacturing methods and procedures, as well as completely different processing equipment.

7. Extruder heads have various types, complex structures and high assembly accuracy. In addition to special processing methods and equipment, special fixtures, cutters and special heat treatment methods are needed.

8. In order to improve the quality and service life of the die, in addition to selecting reasonable materials and optimizing design, it is necessary to adopt excellent heat treatment process and surface strengthening treatment process to obtain moderate die hardness and high surface quality, which is particularly important for difficult-to-extrude products with particularly complicated shapes and dies with special structures.