Die cushion special for aluminum alloy profile extrusion

Abstract

The invention provides a die cushion special for aluminum alloy profile extrusion. The die cushion comprises two cooling channels, namely an outer cooling channel (3) and an inner cooling channel (5),and further comprises two liquid nitrogen channels, namely a first channel (2) and a second channel (9); the inner cooling channel (5) is located on the outer side of a profile extrusion channel (7)and is the same as the profile extrusion channel (7) in section shape, and the outer cooling channel (3) is located on the outer side of the inner cooling channel (5) and is round in the section shape; and the first channel (2) communicates with the outer cooling channel (3), the second channel (9) communicates with the inner cooling channel (5), the outer cooling channel (5) is connected with theinner cooling channel (3) through a first passageway (4), and the inner cooling channel (5) is connected with the profile extrusion channel (7) through a second passageway (6). According to the die cushion special for aluminum alloy profile extrusion, the temperature of a profile extrusion die and the temperature of an extruded profile can be effectively controlled, and contact between the profile and air is reduced, so that surface oxidation of the profile is prevented, the surface quality and the structure performance of the profile are greatly improved, meanwhile, the service life of the die is prolonged by 17%, and the extrusion speed of the profile is increased by 9%.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy material manufacturing, in particular to a special die pad for extrusion of aluminum alloy profiles. Background technique [0002] Due to the advantages of light weight, high strength, corrosion resistance, and beautiful appearance, aluminum profiles have gradually developed from the fields of construction, electronics, and home decoration to fields that require higher surface quality and mechanical properties, such as vehicles, ships, and aircraft. . [0003] Due to the continuous rise of temperature during the extrusion process of aluminum profiles, surface defects are generated on the surface of the profiles due to uneven structure and grains. At the same time, the contact of high-temperature profiles with air causes the surface oxidation of the profiles, resulting in the surface quality and mechanical properties of the profiles not meeting the requirements. At the same time, the The se...

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Problems solved by technology

[0003] Due to the continuous rise of temperature during the extrusion process of aluminum profiles, surface defects are generated on the surface of the profiles due to uneven structure and grains. At the same time, the contact of high-temperature profiles with air causes the surface oxidation of the profiles, resulting in the surface quality and mechanical properties of the profiles not meeting the requirements. At the same time, the The service life of the mold is shortened, so there is a device that uses liquid nitrogen to cool and draw aluminum rods

[0004] The existing liquid nitrogen cooling device for drawing aluminum rods can only cool ring-shaped aluminum rods, and cannot adapt to aluminum profiles of different cross-sections. It does not consider the rationality of the cooling channel setting and the gradient distribution of the mold heating, which will lead to uneven cooling of the mold and damage to the surface of the profile. Due to the uneven structure and grain, surface defects will affect the surface quality and structure performance of the profile, etc.

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