Casting process of bearing cover

Abstract

The invention discloses a casting method of bearing caps. The casting method comprises following steps: templet preparation; sand mould preparation; anti-loosening core print preparation; melting; pouring; and obtaining of finished products. The anti-loosening core print is prepared after sand mould preparation; the anti-loosening core print comprises a truncated-cone-shaped bottom pillar; the bottom of the bottom pillar is provided with a strip pillar; the anti-loosening core print is inserted into a cylindrical groove, the strip pillar is inserted into the sand mould, and the bottom pillar is arranged in the groove. The casting method is capable of solving a problem that loosening of casting parts is easily caused, and increasing product qualified rate, tensile strength, elongation percentage, and yield strength, and possesses excellent beneficial effects.

Description

technical field [0001] The invention relates to a casting process, and the characteristic relates to a casting process of a bearing cap. Background technique [0002] In large mechanical equipment, bearing cap is one of the most common parts. A common bearing cap includes a bearing cap main body, which has a mold cavity inside, a bottom edge on the bottom of the bearing cap main body, and a set of cylindrical fixing columns on the inner side of the bottom edge. The casting process of the bearing cover is to pour molten iron into the sand mold, and obtain the casting after cooling. Due to the characteristics of ductile iron castings, the cooling and solidification is from the outside to the inside. The external cooling is fast, and the internal cooling is slow. After the cooling and solidification process, the wall thickness of the casting is easy to become loose, resulting in scrapped parts. In addition, the smelting process and pouring process of the existing bearing cap ...

AI Technical Summary

Problems solved by technology

Due to the characteristics of ductile iron castings, the cooling and solidification is from the outside to the inside. The outside cools quickly, and the inside cools slowly. After the cooling and solidification process, it is easy to loosen the wall thickness of the casting and produce scrap parts.

In addition, the smelting process and pouring process of the existing bearing cap casting are relatively unreasonable, resulting in unsatisfactory properties of the casting such as tensile strength, elongation and yield strength