Aluminum profile hot extrusion die with long service life

Abstract

The invention discloses an aluminum profile hot extrusion die with a long service life. The aluminum profile hot extrusion die comprises a terrace die and a die. The terrace die is provided with a diecore and a pressure reducing bridge. A primary sink bridge is arranged at one end of the terrace die, a plurality of dividing holes communicating to the primary sink bridge are formed between the terrace die and the die core, a perforated hole is also formed in the die core, one end of the perforated hole communicates to the primary sink bridge while the other end of the perforated hole communicates to the dividing holes, and a welding chamber, a working tape and a discharge hole are successively formed in the terrace die from one end to the other end; after the terrace die and the die are assembled, the dividing holes communicate to the welding chamber, and an aluminum profile forming cavity is formed between the die core and the working tape. Under a circumstance of equal die specification and unchanged using conditions, by designing a novel scheme, purposes of reducing the pressure and prolonging the service life of the die are achieved by means of a design of reducing the pressureby the perforated hole.

Description

technical field [0001] The invention relates to a hot extrusion die for aluminum profiles with long service life. Background technique [0002] Due to the harsh conditions of high temperature, high pressure, high friction and thermal fatigue, the hot extrusion die is especially for the large core cross-section mold (large core means that the circumscribed circle of a single square head of the mold exceeds 0.9 times the diameter of the aluminum rod of the machine. Above) are more prone to early failure and scrapping due to core flushing, bridge cracking, etc., which will affect the service life of the mold. [0003] In the prior art, methods such as milling the decompression bridge, shortening the effective thickness of the punch, and shortening the working belt are usually used in the decompression aspect of the conventional design of the mold with a large core cross section. Although such methods have certain effects on decompression, but The compressive strength of the mo...

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Problems solved by technology

[0002] Due to the harsh conditions of high temperature, high pressure, high friction and thermal fatigue, the hot extrusion die is especially for the large core cross-section mold (large core means that the circumscribed circle of a single square head of the mold exceeds 0.9 times the diameter of the aluminum rod of the machine. Above) are more prone to early failure and scrapping due to mold core flushing, bridge cracking, etc., which will affect the service life of the mold

[0003] In the prior art, methods such as milling the decompression bridge, shortening the effective thickness of the punch, and shortening the working belt are usually used in the decompression aspect of the conventional design of the mold with a large core cross section. Although such methods have certain effects on decompression, but The compressive strength of the mold is weakened, which has a certain adverse effect on the service life of the mold

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