7-series hard alloy row material extrusion mold

Abstract

The invention discloses a 7-series hard alloy row material extrusion mold. The mold comprises a feeding opening, the feeding opening comprises a middle feeding part and side feeding parts, the side feeding parts are symmetrically arranged on the two sides of the middle feeding part to form butterfly shapes, through the mold, edge aluminum supply is ensured, and the phenomenon that the side size isnot qualified is avoided.

Description

technical field [0001] The invention relates to the technical field of aluminum alloy casting, in particular to a 7-series hard alloy extrusion die. Background technique [0002] Aluminum extrusion molding is to apply strong pressure to the metal billet placed in the mold cavity (or extrusion barrel), forcing the metal billet to produce directional plastic deformation and extrude from the die hole of the extrusion die to obtain the required section Plastic processing method of parts or semi-finished products with shape, size and certain mechanical properties. [0003] The 7-series aluminum alloy has high strength and high ductility, and is widely used in aerospace and high-end electronic products. However, due to the hard material and poor fluidity of the 7-series aluminum alloy, the extruded products are often prone to bridge bending or cracked. [0004] In order to reduce the amount of processing in the later stage, the material inlet of the mold is bone-shaped, such as ...

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Problems solved by technology

[0003] The 7-series aluminum alloy has high strength and high ductility, and is widely used in aerospace and high-end electronic products. However, due to the hard material and poor fluidity of the 7-series aluminum alloy, the extruded products are often prone to bridge bending or cracked

[0004] In order to reduce the amount of processing in the later stage, the material inlet of the mold is bone-shaped, such as figure 1 As shown, and the bevel transition in the middle and both sides, the vertical end face of the feed port, the design has a pocket, the working belt is longer, the 4 corners are rounded, and the rounded corners are getting smaller and smaller, usually R2, the tolerance is ±0.5 , the reduction of the rounded corners leads to the rapid heating of the rounded corners during the extrusion process. During the production process, the product speed of the 7-series row material die in the forward single-action short-stroke aluminum extrusion machine of 75MN\110MN is the fastest. 0.6m / min, the length of the cutting head and tail is between 3.5m and 4.5m, the feed port of this shape usually has insufficient aluminum supply at the edge, resulting in slump at the 4 corners of the edge of the material, and the edge size is unqualified, The gap between the upper and lower planes is out of tolerance, and due to the large dead zone at the edge, the temperature rise of the four corners of the material discharge is too fast during the extrusion process, resulting in cracking at the corners of the material discharge, and the speed of the product cannot be increased, and the longer material discharge needs to be cut off head and tail

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