Extrusion processing methods of aluminum profile extrusion machine are divided into small machine, medium machine and large machine, which are divided by tonnage. Its model is
a great deal of. Its tonnage range is 300-10000 tons. Extrusion is the process of deformation processing of metal profiles. The metal alloy profiles are placed on the die press, and the extruder is used to repeatedly operate to make the metal plastic deformation at room temperature, medium temperature or high temperature, so as to extrude the required shape and size. At the same time, the methods of extrusion can be divided into forward extrusion, reverse extrusion, lateral extrusion, etc. At present, most of the methods are forward extrusion and hydraulic principle.
Advantages of forward extrusion
1. Machinable profiles with complex shape, low plasticity, difficult deformation and complex section, saving raw materials and improving efficiency.
2. One aluminum profile extruding machine can produce products of multiple varieties and specifications. Only need to change the mold required by the process to produce and process products on the same equipment. The working time period is high in efficiency and easy to operate.
3. Improve the precision and surface roughness of metal profiles.
4. It has the advantages of reducing process, shortening production cycle, simple process flow, and less equipment investment.
Advantages of reverse extrusion
1. In the extrusion process, there is no relative movement between the blank and the extrusion cylinder. Under the same extrusion conditions, there is no relative sliding between the back extrusion cylinder wall and the blank surface, so there is no friction loss, and the service life is long.
2. The deformation extrusion along the product section and length is more uniform.
Disadvantages of reverse extrusion
1. The surface quality of the product is poor, and the blank must be hot peeled or mechanically peeled before reverse extrusion. If hollow blank is used, the inner surface
The roughness shall reach 6.3, and the chamfer of the blank end face shall be less than 0.5.
2. The extruder with large stroke of the special reverse extrusion cylinder must be used, and the one-time investment cost is 20% - 30% higher than that of the forward extrusion.
3. The outer diameter of the products produced by reverse extrusion is limited by the inner diameter of the hollow shaft, so it is 30% smaller than that of the products produced by normal extrusion
about.
4. The stevedores and molds are troublesome, and the auxiliary time is long.