Propeller manufacturing process based on precision casting

Abstract

The invention discloses a propeller manufacturing process based on precision casting, and relates to the technical field of ships. According to the key point of the technical scheme, the propeller manufacturing process comprises the steps that S1, a propeller blade is cast through a precision casting method; S2, the blade is heated; S3, the blade is placed into a mold in a corresponding shape to be subjected to hot extrusion; S4, the blade is ground and polished; S5, the blade is located on a propeller hub; S6, the blade and the propeller hub are welded and fixed; S7, the propeller is subjected to the heat treatment procedure; S8, the propeller is machined; and S9, the surface of the propeller is ground and polished. According to the propeller manufacturing process, through the precision casting method, the propeller blade high in size precision can be directly formed, and later machining procedures are greatly reduced; through the procedures of hot extrusion and heat treatment, the produced propeller is high in strength and toughness; and the implementation performance of the process is high, and the problem that propellers made of stainless steel materials are hard to produce andmanufacture is overcome.

Description

technical field [0001] The invention relates to the technical field of ships, in particular to a precision casting-based propeller manufacturing process. Background technique [0002] The propeller is an important part of the ship, which is used to convert the torque output by the ship's engine into thrust to propel the ship to sail. With the continuous development of the shipbuilding industry, modern ships are developing towards large-scale and high-speed, and the performance requirements of ships for propellers are constantly increasing. [0003] For a long time, copper or copper-zinc alloys have been used as materials for marine propellers, which are easy to cut and process, and are not easy to rust. However, the strength and hardness of propellers made of copper materials are limited. When the propeller collides with stones and driftwood, it is prone to serious deformation or even breakage. At present, the advantages of stainless steel propellers that can replace copper...

AI Technical Summary

Problems solved by technology

[0004] However, the process of making propellers from stainless steel is not interoperable with copper propellers. The main differences are: 1. The fluidity of stainless steel is poor when casting; 2. There is a big difference in hardness and cutting performance between the two.

At present, the manufacture of stainless steel propellers is still in the testing stage, production is difficult and it is difficult to achieve mass production

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