Mesopore feeding process of thick and large part in turbine shell casting turbine chamber

Abstract

The medium-hole feeding process for the thick and large part of the turbine chamber of the turbine shell casting includes a sand core set in the mold corresponding to the turbine chamber to be cast. One end of the shrinkage channel extends to the position connected to the thick part to be cast in the turbine chamber, and the other end of the feed channel extends to the outside of the flange port where the turbine casing casting to be cast and the intermediate body are connected. A riser is provided outside the port corresponding to the feeding channel. This medium hole feeding process improves the feeding efficiency of the riser and reduces the shrinkage porosity in the thick and large parts of the turbine casing casting, thereby improving the product quality of the casting, improving the performance of the turbine casing, and extending the life of the turbine casing. service life.

Description

technical field [0001] The invention belongs to the technical field of casting of auto parts and accessories, in particular to a medium hole feeding process for thick and large parts in a turbine chamber of a turbine shell casting. Background technique [0002] In the automotive field, the turbine casing casting 1' is the main part of the turbocharger. The inner cavity of the turbine casing casting forms a turbine chamber 2', and a turbine is installed in the turbine chamber of the turbine casing. There are two flanges on the turbine casing. The flange ports 1-1', 1-2' and an air inlet, the two flange ports form a direct connection through the turbine chamber, the air inlet communicates with the turbine chamber through the flow channel cavity 1-3', and one of the flanges Port 1-1' is connected to the intermediate body on the turbocharger, another flanged port 1-2' forms the exhaust port, and the intake port is connected to the engine exhaust manifold. At present, in the tur...

AI Technical Summary

Problems solved by technology

[0005] Whether it is the top riser process or the side riser process, the thick and large part of the turbine chamber is fed from the corresponding flange port end of the turbine shell. On the one hand, there is a shortage of long feeding distance; on the other hand Since there is a flow channel ring cavity between the thick part and the corresponding flange port of the turbine shell, during the solidification process, the wall thickness of the casting corresponding to the flow channel ring cavity is relatively thin, and it is easy to solidify in advance, which interrupts the replenishment process. Shrink channel, resulting in shrinkage in the thick part of the turbine chamber

In the actual production process, the shrinkage porosity of this part can usually be controlled within 1%, but it is difficult to reach within 0.5%, which makes the product quality not reach a higher level, and cannot meet the high requirements proposed by customers. Quality requirements

Images