Method for casting cabin casts of aerogenerators

Abstract

The invention discloses a method for casting cabin casts of aerogenerators, comprising the steps of mould manufacture, the manufacture of sand moulds and moulding by pouring. During the manufacture of sand moulds, a bottom pouring type pouring system is adopted; an ingate II (2) is arranged in a round hole of a main bearing on the bottom surface of a cast mould cavity; an outer sprue is a quantitative ladle stopper pouring sprue; the ratio of cross-sectional areas of a sprue I to a side runner to a sprue II to an ingate I to the ingate II is (0.20 to 0.80) to (1.80 to 2.60) to 1 to (4.0 to 6.0) to (2 to 4); during the moulding by pouring, the taphole temperature of iron liquor is from 1430 DEG C to 1500 DEG C; the magnesium explosion time is from 1.20 seconds to 4.50 seconds; the pouring temperature is controlled from 1275 DEG C to 1370 DEG C; the pouring time is from 30 seconds to 70 seconds; and then a cast (1) is obtained. Compared with the prior art, the method ensures that a large cast is not easy to deform or to produce a shrinkage hole, shrinkage porosity or entrapped slag, and the rate of finished products is high.

Description

Technical field: [0001] The invention relates to a casting method of a wind power generator nacelle casting. Background technique: [0002] At present, the sand casting process of ordinary parts is adopted for the castings of the wind turbine nacelle, but the weight of the castings of the wind turbine nacelle is about 7.2 tons, and the dimensions of the castings are 2480mm×2800mm×1860mm. Higher, longer length, while the sand box rigidity, sand strength, exhaust and slag retaining design and pouring temperature of the sand casting process of ordinary parts are not suitable for the casting of large parts, so the residual stress is large and easy to deform during casting , Shrinkage cavity, shrinkage porosity and slag inclusions are scrapped, and the casting yield is low. Invention content: [0003] Aiming at the above problems, the present invention provides a casting method for a wind power generator nacelle casting that can make large castings less likely to be deformed, ...

AI Technical Summary

Problems solved by technology

[0002] At present, the sand casting process of ordinary parts is adopted for the castings of the wind turbine nacelle, but the weight of the castings of the wind turbine nacelle is about 7.2 tons, and the dimensions of the castings are 2480mm×2800mm×1860mm. Higher, longer length, while the sand box rigidity, sand strength, exhaust and slag retaining design and pouring temperature of the sand casting process of ordinary parts are not suitable for the casting of large parts, so the residual stress is large and easy to deform during casting , produce shrinkage cavity, shrinkage porosity and slag inclusion and scrap, the casting yield is low

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