Special friction stir processing tool for manufacturing high-performance marine propeller

Abstract

The invention discloses a special friction stir processing tool for manufacturing a high-performance marine propeller. The processing tool comprises a shaft shoulder, wherein the shaft shoulder is provided with a plurality of stirring needles. The special friction stir processing tool is characterized in that the amount of the stirring needles is six; the stirring needles are arranged at the end portion of the shaft shoulder and extend in the axial direction of the shaft shoulder; the stirring needles are divided into two stirring needle sets which comprise the first stirring needle set and the second stirring needle set; the first stirring needle set and the second stirring needle set are each provided with three stirring needles; the first stirring needle set and the second stirring needle set are distributed in axial symmetry; one end of each stirring needle is inserted into the shaft shoulder while the other end of the corresponding stirring needle extends outside the shaft shoulder; the end portion, extending outside the shaft shoulder, of each stirring needle is provided with a stirring unit; each stirring unit comprises a first stirring part and a second stirring part; each first stirring part is of an arc-shaped structure and the first stirring parts are distributed at the periphery of the corresponding stirring needle; the second stirring parts are distributed at the joints of the first stirring parts; and the first stirring parts and the second stirring parts are connected at intervals in sequence and accordingly a closed hook face is formed. The multiple specially designed stirring needles are provided, effective stirring can be conducted, stirring efficiency is promoted, and the using effect is improved.

Description

technical field [0001] The invention relates to a friction stir processing tool specially used for manufacturing high-performance marine propellers. Background technique [0002] my country has already become the world's largest shipbuilding country, and is developing into a shipbuilding power. At present, the total tonnage of my country's shipbuilding ranks first in the world. With the advent of the ocean age, the shipping industry is in an important stage of leapfrog development, requiring a large number of high-performance ships, and the requirements for the quality of ships and their parts are getting higher and higher. Therefore, the importance of the mechanical properties and cavitation resistance performance of propeller materials is becoming more and more obvious. During the propulsion process of the ship, the propeller continuously generates cavitation, and the negative pressure burst generated by the cavitation produces a pulse stress of several hundred MPa to 10...

AI Technical Summary

Problems solved by technology

The friction stir processing tool in the prior art includes a shaft shoulder and a stirring pin, and the stirring pin is installed at one end of the shaft shoulder. The friction stir processing tool with this structure is easy to wear and tear during use because the stirring pin is separate, and due to contact The area is limited, therefore, the processing efficiency is low

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