Aluminum profiles are different. How to determine the tonnage of the extrusion press used for production?
The extrusion press is the main equipment for producing aluminum profiles. The shape, size and appearance quality of the aluminum profiles are closely related to the quality of the extrusion press. There are many types of extrusion presses. Many companies must pay attention to the extrusion presses when purchasing them. A systematic understanding of the model, extrusion capacity and grade of the extrusion machine. How to determine the tonnage of the aluminum profile extrusion press is also an aspect that aluminum profile manufacturers must consider when purchasing an extrusion press. Now we will explain Let’s talk about how to choose the tonnage of the extruder.
Based on the type of alloy to be extruded, the annual production volume of a single machine and the maximum circumscribed circle diameter of the profile, we will initially select the type of extruder. The first issue to consider is the tonnage of the extruder.
When selecting the tonnage of the extruder, it is generally necessary to first calculate the extrusion ratio of the extruder. The extrusion ratio is also called the extrusion coefficient, which refers to the ratio of the cross-sectional area of the extrusion barrel to the total cross-sectional area of the aluminum profile. It is the main parameter used to measure the deformation of aluminum alloys in the production of aluminum profiles. It is expressed by the following formula:
λ=Ft/ΣF1
Among them, Ft represents the cross-sectional area of the aluminum ingot after filling in the extrusion barrel, expressed in mm²;
ΣF1 represents the total cross-sectional area of the extruded profile, expressed in mm²;
During the extrusion of aluminum profiles, the amount of deformation of the aluminum alloy can also be expressed by the degree of deformation: ε=λ-1
If the extrusion processing method is used, the extrusion ratio is limited. The extrusion ratio λ of the primary extrusion aluminum profiles and aluminum rods during extrusion is greater than 8-12. The extrusion ratio of the blank used for secondary extrusion is There is no limit to the pressure ratio.
The method used to calculate the extrusion ratio above is simply the cross-sectional area of the extruded ingot ÷ the cross-sectional area of the extruded profile. It can also be calculated in other ways, that is, the length of the extruded profile ÷ the extrusion length. The length of the ingot.
Before determining the tonnage of the extruder, it is necessary to understand the cross-sectional shape of the profile to determine the size of the mold and then determine the structural form of the mold. In this way, it can be determined whether the extrusion is a hollow profile or a solid profile. These two different There is a difference in the extrusion press tonnage required for structural profiles.
There are many classifications of extruders. According to the extrusion capacity, they can be divided into small, medium, large and heavy extruders. The extrusion capacity of each different model of extruder is limited. The extrusion capacity is usually expressed in MN. means, that is, the tonnage. The tonnage of the 6063 aluminum profile extrusion press used in industrial production has the following standards:
Extruders of the above tonnage can be used to extrude aluminum profiles of 6063 profiles. Aluminum profile manufacturers should fully consider the extrusion coefficient of the extruder, the cross-sectional shape of the profile and the size of the mold when selecting the tonnage of the extruder. Based on its own production conditions and product requirements, the deformation amount of the metal can be obtained according to the calculation formula, so as to determine the appropriate tonnage of the extruder, which can not only extrude aluminum profile products with qualified quality, but also not cause unnecessary economic waste to the enterprise.
