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

A turbocharger and ductile iron technology, which is applied in the casting field of thin-shell ductile iron turbochargers, to achieve the effects of ensuring reliability, improving strength and surface quality, and avoiding shrinkage defects

Inactive Publication Date: 2010-06-02
KOCEL EQUIP +1
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Problems solved by technology

[0010] The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a unique process method, which can solve the problem of shrinkage and porosity easily caused by the inability to use risers to feed the locally thick a

Method used

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Embodiment Construction

[0036] A casting method of a thin-shell ductile iron turbocharger is characterized in that it comprises the following steps:

[0037] a. Process method design: center type is used. For the situation that the side door of the casting is not on the same plane and it is not easy to type, the curved surface hanging tire method is used in the process design to solve it. At the same time, considering the higher requirements for the flange joint surface of the casting, it In order to ensure the quality of the joint surface and avoid flange slag inclusion defects due to the large number of hole positions, the important flange faces downward from the parting method to ensure the cleanliness of the important flange faces. Closed pouring system, multi-point pouring method at the bottom of the mold, so that the molten iron can be filled smoothly;

[0038] b. Design of three-dimensional model of casting process: use computer software to establish a three-dimensional model consistent with t...

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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...

Claims

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Application Information

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IPC IPC(8): B22D15/02B22D1/00
Inventor 原晓雷王向阳陆建斌鱼小伟尤青岭徐国强曲泽茂谢伟科刘利平
Owner KOCEL EQUIP
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