Efficient ceramic core removal device for hollow blade

Abstract

The invention provides a ceramic core removal device which mainly structurally comprises a high-pressure reaction vessel 1, a stainless steel basket 3, a pressure pump 5, an air storage chamber 6, a foam disk 7, heating elements 8, a pressure release valve 9, a safety valve 10 and a lifting mechanism 11. In the use process of the ceramic core removal device, a large number of tiny bubbles are blown into an alkali solution 4 in a pressurizing manner and penetrate through various pores in a hollow blade 2 to reach a deep position of a ceramic core, a reaction product rapidly diffuses into the alkali solution by the high-speed scouring action of the bubbles on a solid-liquid interface reaction layer, contact of the alkali solution and the ceramic core is constantly ensured, normal reaction is ensured, and removal of the ceramic core is greatly accelerated.

Description

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AI Technical Summary

Benefits of technology

This new device removes ceramics from castings quickly with less damaging impact on their surfaces compared to previous methods like sandblast or water blast techniques. It uses small pieces made up mostly of silicon dioxide (SiO2) instead of larger ones used for other purposes such as aluminum oxynitride (AlON). These smaller Si02particles help remove faster than older methods while still being able to protect them during use.

Problems solved by technology

Technological Problem addressed by this patented method relates to removing ceramics from gas turbine engine components such as blade roots during manufacturing processes involving these materials. Current techniques involve either wetting them down into solvents containing strong bases (KOH) or adding an acid/alkali mixture before dissolving out any remaining material. These solutions have limitations when trying on complicated internal spaces like those involved in certain types of alloys. Additionally, there may also exist issues related to residual metal contaminants left behind after cleanup steps.

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