Manual low-cost casting method of large aluminum alloy shell

Abstract

The invention discloses a manual low-cost casting method of a large aluminum alloy shell. The manual low-cost casting method comprises the steps of processing a wood former, putting the wood former with an upward plane and a downward inner cavity in a frame, filling a mold with resin sand as a lower sand mold, and putting frozen iron at the wall thickness of the mold and chilled sand at the chamfering; putting a top gating system on an upper sand mold, wherein a riser is located in the large thick position of the upper sand mold, and uniformly drilling a plurality of air outlet holes in the top of the upper sand mold; filling the wood former with resin sand, pre-burying an air outlet rope and a hook, and putting frozen iron at the wall thickness; heating Al to 730 to 740 DEG C, adding Cu,insulating for 9 to 11 min, then heating to 750 to 760 DEG C, adding Mn, insulating for 5 to 8 min, finally, cooling to 740 to 750 DEG C, adding Ti, deslagging and introducing argon to degas for 13 to17 min, so that molten aluminum alloy is obtained; and matching a casting mold with a sand core, assembling the mold, and then cooling after the molten aluminum alloy is poured in through a pouring cup. The manual low-cost casting method has the characteristics of low cost, simple tool and high qualified rate.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal casting, and in particular relates to a manual low-cost casting method for a large aluminum alloy shell with low cost, simple tooling and high qualification rate. Background technique [0002] Casting is the main method for the production of various parts. Casting is almost not limited by the size and wall thickness of the parts, and has a wide range of applications, such as diesel engine blocks, cylinder heads and other parts. Sand casting, which is easy to manufacture, is suitable for single-piece production, batch production and mass production of castings. It has been the basic process in foundry production for a long time. [0003] Sand casting is a casting method that produces castings in sand. Steel, iron and most non-ferrous alloy castings can be obtained by sand casting. Because the molding materials used in sand casting are cheap and easy to obtain, the casting mold is simple...

AI Technical Summary

Problems solved by technology

With the development of personalization and ordering, there are more and more castings for single-piece or even small-batch production. However, due to the use of machine modeling tooling and complex, the overall tooling cost is high, and the preparation time is long, so it is difficult to adapt to short, flat and fast. need

Although the manual molding and casting tooling is relatively simple, the preparation time is short, and the cost is low, for large aluminum alloy shells, the casting method with the inner cavity facing up and the plane down in the prior art, due to the thicker bottom The solidification of the plane is slow, and it is easy to form defects such as shrinkage cavities

However, the casting with the inner cavity facing down and the plane on the top can solidify the whole body sequentially from bottom to top, thereby avoiding defects such as shrinkage cavities, but it is difficult to eliminate cracks and pores, which makes casting difficult and waste products higher rate

Images