Low-pressure casting die for wheel hub and pouring method of low-pressure casting die
A low-pressure casting and hub technology, applied in the field of casting, can solve problems such as insufficient mechanical strength and increase product wall thickness, achieve the effects of improving the poor appearance of casting, improving mechanical strength, and reducing the probability of air and oxides being involved
Active Publication Date: 2015-05-06
LIANYUNGANG QICHUANG ALUMINUM PROD MFG
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Problems solved by technology
However, although the existing three-gate casting process meets the requirements of lightweight products to a certain extent, there are still problems to be solved from the actual production situation
At the end of the rim (intersection) and the front flange, where the microstructure of the material is originally required to be refined, due to the setting of the gate, the mechanical strength of this part of the hub is insufficient. In order to make up for this deficiency, the product wall has to be increased. thick
Method used
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Embodiment 1
[0058] Liquid aluminum composition
[0059] Si Fe Mg Ti Sr Zn Pb Cu mn Ni sn Cr Al 7.2 0.12 0.25 0.12 0.016 0.001 0.01 0.08 0.008 0.012 0.04 0.05 margin
[0060] With the casting mold of the present invention, the height of the cavity at the spoke is 8 mm, the maximum cross-sectional area Q1 of the second gate is the same as the maximum cross-sectional area M1 (N1) of the first gate, and the minimum cross-sectional area of the second gate Q2 is the same as that of the first gate The ratio of the minimum cross-sectional area M2 (N2) is 0.6. The ratio of the minimum cross-sectional area Q2 to the maximum cross-sectional area Q1 of the second gate Q1 / Q2=0.45; the ratio of the minimum cross-sectional area M2 (N2) to the maximum cross-sectional area M1 (N1) of the first gate M1 / M2(N1 / N2) =0.78.
[0061] The technological process and parameters when using the above mold pouring are as follows:
[0062] 1) Liquid-raising stage:...
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Abstract
The invention relates to a low-pressure casting mold for a wheel hub. The upper mold, the upper mold core, the left mold, the right mold and the lower mold are combined to form a casting cavity for casting a wheel hub. The casting cavity includes a molding cavity for a rim portion and a spoke portion The molding cavity and the mounting surface molding cavity; the left mold and the right mold are provided with the first gate directly connected to the molding cavity of the rim part, and the lower mold is provided with the first gate directly connected to the mounting surface molding cavity. Two gates, the top of the second gate is higher than the top of the first gate; the lower template is provided with a sprue cup matching the first gate and the second gate, and the upper ends of the sprue cup are respectively connected with The first gate is communicated with the second gate, and the lower end of the sprue cup is communicated with the liquid riser inserted into the holding furnace. The invention also relates to a casting method using the mold. The invention improves the setting of the gate, thereby reducing the weight of the product, improving the microstructure of the molten soup, improving the mechanical properties of the product, and greatly reducing the occurrence of poor appearance.
Description
technical field [0001] The invention relates to the technical field of casting, in particular to a hub low-pressure casting mold especially suitable for pouring molten aluminum and a pouring method thereof. Background technique [0002] In the past, when low-pressure casting was used for wheel hubs, a gate was provided on the mounting surface, molten soup was injected from the gate, and the spokes and rim were poured and solidified in sequence. The method is called single-gate casting. In the single gate method, in order to fully fill the molten soup under the action of pressure, directional solidification is generally carried out in the order from the center hole, to the spoke part, and then to the rim part. However, in this casting method, since the spoke portion of the hub has a complex shape in which thick portions and thin portions coexist, it is difficult to achieve directional solidification of the rim portion from the mounting surface. At the same time, in this way,...
Claims
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IPC IPC(8): B22D18/04
Inventor 金仁国
Owner LIANYUNGANG QICHUANG ALUMINUM PROD MFG