Multi- structure motor enclosure aluminium alloy hot-extrusion die

Abstract

The hot extruding die for producing hollow motor housing of aluminum alloy consists of one guide die, one upper die and one lower die superposed together. The guide die has in the feeding side seven bridge sites and seven shunting holes; the upper die has seven bridge sites and seven material shunting holes in the feeding side, and 21 discharge shunting holes separately in two circles, inner bridge sites and eight die cores in the discharge side; and the lower die has one welding chamber and two choking lugs in the feeding side. The hot extruding die can equalize the metal flow, capacity of ensuring high product quality and yield, and long service life.

Description

technical field [0001] The invention relates to a hot extrusion die, in particular to an aluminum alloy hot extrusion die with multiple hollow structures for motor casings. The invention belongs to the technical field of aluminum profile moulds. Background technique [0002] With the development of industry, the demand for motor shells is also increasing. Many motor shells have changed from the original cast iron form to aluminum alloy form (as shown in Figure 11). The main advantages are: low cost, good dimensional accuracy, and easy processing. Less process, easy to form mass production. At present, this aluminum alloy motor casing is mainly produced by hot extrusion dies, but such dies also have many shortcomings, such as: [0003] 1. Due to the many hollow structures, the core strength of the upper mold is low, and it is prone to breakage or deflection, and the output is not high. [0004] 2. Due to the difficulty in feeding materials at the joints of the hollow struc...

AI Technical Summary

Problems solved by technology

[0003] 1. Due to the many hollow structures, the core strength of the upper mold is low, and it is prone to breakage or deflection, and the output is not high

[0004] 2. Due to the difficulty of feeding materials at the joints of the hollow structure, it is easy to cause uneven wall thickness or insufficient feeding of the inner circle of the motor shell, resulting in an ellipse, which cannot meet the dimensional accuracy requirements

[0005] 3. Due to the great difference in wall thickness, the flow rate is difficult to adjust, and the motor casing is easily twisted and bent, which cannot meet the requirements of straightness and flatness. At the same time, the outer surface is prone to hand feeling and other phenomena.

[0006] 4. Due to the large core and high pressure of the upper mold, the strength of the upper mold is not enough, resulting in cracked bridges, resulting in low mold life

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