How to choose the tonnage of aluminum extrusion press?

How to choose the tonnage of aluminum extrusion press?

How to choose the tonnage of aluminum extrusion press?

The tonnage of the aluminum extrusion press represents the extrusion force of the extrusion press, so how to chose the tonnage of aluminum extrusion press means how to choose the extrusion force of extrusion press.

Aluminum extrusion press is the main equipment for the production of aluminum profiles.

The shape, size and appearance quality of aluminum profiles are closely related to the quality of the extrusion press.

There are many types of extrusion press according to different classification.

For a systematic understanding of the model, extrusion capacity and grade of the extrusion press, how to determine the tonnage of the aluminum profile extruder is also an aspect that aluminum profile manufacturers must consider when purchasing an extrusion press.

Now here explain how to choose the tonnage of the extrusion press

According to what alloy to be extruded, the annual output of a single machine and the maximum circumscribed diameter of aluminum profile, we will preliminarily select the type of extrusion press.

The first thing to consider is how large the tonnage of the extrusion press is.

When selecting the tonnage of the extrusion press, it is generally necessary to first calculate the extrusion ratio of the extrusion press.

The extrusion ratio is also called the extrusion coefficient, which refers to the ratio of the cross-sectional area of the extrusion container to the total cross-sectional area of the aluminum profile.

It is the main parameter used to measure the amount of deformation of aluminum alloy in the production of aluminum profiles, expressed by the following formula:

λ=Ft/ΣF1

Among them, Ft represents the cross-sectional area of the aluminum billet after being filled in the extrusion container, expressed in mm²;

ΣF1 represents the total cross-sectional area of the extruded profile, expressed in mm²;

When extruding aluminum profiles, the amount of deformation of 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 aluminum profile and aluminum billet in the first extrusion is greater than 8-12, There is no limit to the extrusion ratio of mill finish for secondary extrusion.

The method used to calculate the extrusion ratio above is simply the cross-sectional area of the extruded billet ÷ the cross-sectional area of the extruded profile, which can also be calculated in other ways, that is, the length of the extruded profile ÷ The length of aluminum billet for extrusion.

Before determining the tonnage of the extrusion press, it is necessary to understand the cross-sectional shape of the profile, so as to determine the size of the mold, and then determine the structure of the mold, so that it can be determined whether the extrusion is a hollow profile or a solid profile. The extrusion press tonnage required for these two different structural profiles will be different.

There are many classifications of an extrusion press according to the extrusion capacity, they can be divided into small, medium, large and heavy extrusion press.

Aluminum extrusion presses are named according to the size of the extrusion force, but three measurement units of the International Unit System/Engineering Unit System/US System can be used to characterize the extrusion force.

MN is the international unit ” Millions of Newton“, T is the engineering unit “Ton“, UST is the American unit “US ton” 1MN=1000000N=100000kg=100T, 1T=1.1UST.

For example, a 12.5MN extruder is a 1250T extrusion press, another example, the 880UST extrusion press is the 800T extrusion machine.

The tonnage of the extrusion press is basically increased by a ratio of 1.25, that is, the extrusion force of the extrusion press is 25% greater than that of the lower capacity extrusion press.

For example, the bigger capacity than 800T is 1000T, the bigger capacity than 1000T is 1250T, the bigger capacity than 1250T is 1600T, the bigger capacity than 1600T is 2000T, and the bigger capacity than 2000T is 2500T.

The extrusion capacity of each type of extrusion press is limited.

The extrusion capacity is usually MN(Millions of Newton), which is the tonnage of the extrusion press. 

The tonnage of aluminum extrusion press used in industrial production for 6063 has the following:

500T, 600T, 800T,1000T,1250T, 1600T(16MN), 1800T(18MN), 2000T(20MN), 2500T(25MN), 3000T(30MN), 3600T(36MN),4000T(40MN), 5000T(50MN), 6000T(60MN), 8000T(80MN),10000T(100MN),12500T(125MN)

500T extrusion press can produce some small size aluminum extrusion profiles, 600T extruded aluminum billet specifications are within 90mm, 800T or 1000T extrusion presses are used to produce aluminum doors and windows products, 1250T extrusion press and bigger extrusion press can be used for curtain wall and industrial aluminum profiles.

Aluminum billet specifications of 1800t extrusion press is 178mm, 2500T corresponding aluminum billet specifications at 230-254mm, 3000T and 3600T can produce industrial aluminum profile products, of course, there is some larger tonnage, such as 4000T, 5000T, 6000T aluminum extrusion press and so on.

An extrusion press with the above tonnage can be used to extrude 6063 alloy aluminum profiles.

Aluminum profile manufacturers should fully consider the extrusion coefficient of the extrusion press, the cross-sectional shape of aluminum profile and the size of the die when selecting the tonnage of the extrusion press, according to its own production conditions and product requirements, the deformation of the metal is obtained according to the calculation formula, so as to determine the appropriate extrusion press tonnage, which can extrude qualified aluminum products without causing unnecessary economic waste.