Extrusion die capable of prolonging service life of high-strength 7-series aluminum alloy die

Abstract

The invention relates to the technical field of machinery. An extrusion die capable of prolonging the service life of a high-strength 7-series aluminum alloy die comprises a die body, the die body comprises an upper die and a lower die, the lower die sequentially comprises a welding chamber and a die hole from top to bottom, a feeding hole is formed in the upper die, a flow dividing bridge is fixed in the feeding hole, a die core is arranged at the lower end of the flow dividing bridge, a spare hole which directly faces the middle rib forming position of the sectional material and is communicated with the middle rib forming position of the sectional material is formed in the flow dividing bridge, flow guiding holes are formed in the positions, close to the die core, of the flow dividing bridge and located on the front side and the rear side of the spare hole, and the flow guiding holes are communicated with the feeding hole and the spare hole; the tops of the flow guiding holes are flush with the top of the welding chamber; and the bottoms of the flow guiding holes are flush with the bottom of the welding chamber. Compared with a traditional structure, machining of a material guiding groove is omitted, the overall strength of the die can be improved, the use period of the die can be prolonged, and the service life of the die is prolonged.

Description

technical field [0001] The invention relates to the technical field of machinery, in particular to extrusion dies. Background technique [0002] With the development of lightweight automobiles, the use of aluminum alloys for automobile bumper beams has been widely used. Among them, the ultra-high-strength 7-series aluminum alloys have recently been more and more applied to actual production. [0003] The 7-series alloy has a large resistance to metal deformation and poor fluidity, which will greatly damage the service life of the mold. [0004] At present, the upper die of the extrusion die of the automobile bumper beam generally uses a drainage groove to feed the middle rib of the profile. For the structure of the drainage tank, see figure 1 , figure 2 as well as image 3 A, B, C, D in four places. [0005] Since there are drainage grooves in many places on the upper mold, extruding the ultra-high-strength 7-series aluminum alloy is not conducive to ensuring the overa...

AI Technical Summary

Problems solved by technology

[0003] The 7 series alloy has great damage to the service life of the mold due to its high deformation resistance and poor fluidity.

For the 7TE2 alloy grade in the 7-series alloy, because its tensile strength reaches 460Mpa, the requirements for the strength of the die are higher. The structure of the traditional extrusion die can only achieve a production life of about 1.4 tons.

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