Aluminum blade of fan and manufacturing technology thereof

Abstract

The invention discloses an aluminum blade of a fan rotor for a mine and a highway tunnel, and the blade is made from an aluminum material and is manufactured by a precision forging technology. The manufacturing steps comprise: (1) manufacturing a set of forging mold according to the physical dimension and the profile shape of the blade, wherein the mold comprises a hammer forging die and a trimming die; (2) heating a forged aluminum bar stock, and forging a blank the shape of which is similar to that of the blade by adopting a free forging technology; (3) heating the blank, and placing the blank in the hammer forging die to perform hammer forging forming; (4) cutting burr by the trimming die; (5) polishing trimmed burr by an angle grinder; (6) checking the transmittance of a blade basin and a blade back of the blade body, taking the blade basin and the blade back with the transmittance less than or equal to 1.5mm into the next working procedure, or else returning for reforging; (7) carrying out heat treatment and quenching; (8) carrying out cold straightening; and (9) carrying out artificial treatment. The density and strength of the blade manufactured by the material and method is greater than that of the aluminum blade, by adopting the blade with the same specification, the rotation speed and the flow rate of the fan can be improved, the performance of the fan is strengthened, and the cost is reduced.

Description

technical field [0001] The invention relates to an aluminum alloy blade mainly used for fan rotors used in mines and highway tunnels and a forging process thereof, belonging to the technical field of precision forging. Background technique [0002] The rotor blades of the large-scale mine fan produced by Parker in the United States are installed on the fan hub. The motor drives the hub rotor to rotate, and the blades compress and pressurize the air to achieve the purpose of air supply or exhaust. There are 4 types of blades for this type of fan: 12 inches, 14 inches, 24 inches, and 30 inches. These four types of blades are installed on hubs with different outer diameters; the installation method, structure, and function are the same; the length of the blades and the shape of the blades are different. These 4 types of blades are formed by precision casting of aluminum alloy. Due to defects such as loose metal structure and pores in precision casting blades, the product quali...

AI Technical Summary

Problems solved by technology

These 4 types of blades are formed by precision casting of aluminum alloy. Due to defects such as loose metal structure and pores in precision casting blades, the product qualification rate is low, and the cast blades have fatal weaknesses such as poor yield strength, tensile strength, plasticity and other physical properties. The speed of the fan, the flow speed of the wind, and the flow rate are determined. After the fan speed is increased, the blade breaks, causing damage to the fan (the maximum speed of the casting blade is 1800 rpm, and it will break if it is higher)

Images