Method for casting thin-shell nodular-cast-iron turbocharger

Abstract

The invention relates to a method for casting a thin-shell nodular-cast-iron turbocharger, in particular to a method for casting the thin-shell nodular-cast-iron turbocharger and the like products, which is characterized by comprising the following steps of: process method design, three-dimensional model design of the casting process, mold-filling / solidifying simulation, analysis treatment for a simulated result, selection of mold materials, mold assembling simulation, molding, core making, mold assembling, molten iron melting, spheroidizing inoculation, and pouring. The process method provided by the invention is unique, which can solve the problem of shrinkage porosity because the partially overlarge part of an inner cavity cannot be fed by a riser, and can ensure the dimensional accuracy of air cavity, water cavity and oil cavity which are intersected one another in the inner cavity of the casting shell.

Description

technical field

[0001] The invention relates to a casting method for a thin-shell ductile iron turbocharger, in particular to a casting method for thin-shell ductile iron turbochargers. Background technique

[0002] Thin-shell ductile iron turbochargers have been monopolized by a few foundry companies in Europe and the United States due to their high technical content and difficult production. This series of thin-shell ductile iron turbocharger castings has a complex structure with air chambers, water chambers, and oil chambers intersected in the inner chamber. The minimum wall thickness in each cavity is only 5-6mm. At the same time, the air cavity, water cavity and oil cavity are required to withstand the calibrated pressure during use, and no leakage is allowed. The casting production of such products has the following difficulties:

[0003] (1) It is very difficult to control the position of the internal air chamber, water chamber, oil chamber, the thickness between t...