Wind power casting cooling method based on air-cooled sand core system
A cooling method and air-cooled technology, applied in the direction of core, mold, mold composition, etc., can solve problems such as huge impact on casting quality and safety production impact.
Active Publication Date: 2022-05-27
SHANGHAI NO 1 MACHINE TOOL FOUNDRY SUZHOU
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Problems solved by technology
During use, it was found that factors such as air temperature and air pressure in the air cooling process have a great impact on the quality of castings, and even, if the process parameters are used improperly, it will have a negative impact on safe production
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Embodiment Construction
[0020] The case is further described below in conjunction with specific embodiments. The air-cooled sand core system for wind power casting used in this example is the system in ZL201921674399.6.
[0021] A method for cooling wind power castings based on an air-cooled sand core system, the steps comprising: 1) forming a cavity with molding sand mixed with a molding sand binder and a model in a sand box; 2) installing a core seat in the cavity , and connect the air-cooled sand core to the core seat; the air intake manifold and the air outlet manifold of the air-cooled channel of the air-cooled sand core are respectively connected to the external cold air source and the waste heat recovery system; 3) After the molten iron is injected into the cavity , cooled to make a casting; in step 3), before injecting molten iron, blow cold air into the intake manifold, the cold air is 4-25 degrees Celsius, and the air pressure strength in the intake manifold is maintained at 1.8-2.3MPa;
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The invention discloses a cooling method of a wind power casting based on an air-cooled sand core system. The cooling method comprises the following steps: forming a cavity by using molding sand and a model in a sand box; mounting a core seat in the cavity, and connecting the air-cooled sand core to the core seat; an air inlet header pipe and an air outlet header pipe of an air cooling channel of the air cooling type sand core are respectively connected with an external cold air source and a waste heat recovery system; after molten iron is injected into the cavity, a casting is manufactured through cooling; before molten iron is injected, cold air is blown into the air inlet header pipe, and the temperature of the cold air is 4-25 DEG C; for a casting with the wall thickness larger than 300 mm, the air pressure intensity of cold air is kept to be 1.8-2.3 MPa; after 12 hours, ventilation is stopped, and the casting is naturally cooled; for a casting with the wall thickness ranging from 100 mm to 300 mm, the air pressure intensity of cold air is kept to range from 1.8 MPa to 2.0 MPa; and after 12 hours, ventilation is stopped, and the casting is naturally cooled. According to the method, the temperature and air pressure of cold air are adjusted, and the cooling efficiency and the casting quality are improved.
Description
technical field [0001] The invention belongs to the technical field of casting, in particular to a cooling method for wind power castings based on an air-cooled sand core system. Background technique [0002] In the prior art, when casting a casting with an opening in the middle, the opening part is mostly formed by a core. The core is placed in the cavity before casting. After the molten iron is poured and condensed, it can be taken out / removed during sand production, and a cavity corresponding to the opening can be formed in the casting. The cooling of molten iron has a great influence on the quality of castings. The ideal state is that all parts of the molten iron in the cavity are cooled synchronously. In practice, this is not possible, the usual way is to optimize the cooling effect of each part as much as possible through cavity design. However, due to the large volume of castings of wind power products, in most cases, the location of the core is surrounded by molte...
Claims
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IPC IPC(8): B22C9/22B22C9/10B22D15/00B22D27/04
CPCB22C9/22B22C9/10B22D27/04B22D15/00
Inventor 仇璟韬
Owner SHANGHAI NO 1 MACHINE TOOL FOUNDRY SUZHOU