Anti-gravity forming air cooled throat ascending feed cutoff method for copper alloy propeller for large ship

Abstract

The invention belongs to the field of ship manufacturing, and relates to an anti-gravity forming air cooled throat ascending feed cutoff method, in particular to an anti-gravity forming air cooled throat ascending feed cutoff method for a copper alloy propeller for a large ship. The method aims to solve the problems that a long time is needed from liquid cooling to a solid state of the copper alloy propeller for the large ship, and after mold filling and an ascending liquid and pressure maintaining curve are finished, a sprue above an ascending liquid pipe must be blocked to cut off ascending feed. An upper tank, a casting mold, a propeller casting, an air cooled throat, a middle partition plate, the ascending feed pipe, a molten copper ladle and a lower tank are included; the upper tank, the middle partition plate and the lower tank are sequentially arranged from top to bottom; the casting mold is arranged inside the upper tank; the molten copper ladle is arranged in the lower tank; the lower portion of the ascending feed pipe is inserted into the molten copper ladle; the upper end of the ascending feed pipe is inserted into the lower surface of the casting mold; and the air cooled throat is arranged at the upper end of the ascending feed pipe in a sleeving mode.

Description

technical field [0001] The invention relates to an anti-gravity forming air-cooled throat cut-off liquid lifting method, in particular to a large-scale ship-used copper alloy propeller anti-gravity formed air-cooled throat cut-off liquid lifting method, which belongs to the field of shipbuilding. Background technique [0002] The development of anti-gravity casting technology provides a technological guarantee for the liquid forming of copper alloy propellers for large ships (including military ships) that require higher quality. Under the condition of anti-gravity, the copper alloy liquid is forced to fill the alloy liquid in the copper water ladle into the mold along the riser pipe against the direction of gravity through the gas pressure on the liquid surface in the copper water ladle being greater than the pressure in the mold cavity. Cavity, after the liquid metal in the cavity is solidified and cooled, a casting is obtained. During the process of the metal liquid in t...

AI Technical Summary

Problems solved by technology

However, a large marine copper alloy propeller casting is about 10 tons, and it takes a long time to cool from liquid to solid state.

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