Casting method of girder having thin-walled cylinder and casting mold

Abstract

The invention discloses a casting method of a girder having a thin-walled cylinder and a casting mold. A casting box consisting of fix boxes of a bottom box, a lower box, a middle box, an upper box and a cover box is adopted to cast; a core mold is transversely placed in the casting box; an inner runner, a vertical runner and a gap runner are arranged in the lower box; a pouring port is formed in the bottom box; meanwhile, transverse runners and longitudinal runners are arranged on the bottom box; pouring ports are respectively arranged in the intersections of all the transverse runners and the longitudinal runners; and molten metal is injected from the pouring port of the bottom box through a pressurization mode in casting, so that the molten metal flows into the casting cavity of the lower box through the inner runner under the pressure effect, flows to two sides through the transverse runner to enter the gap runner along with the vertical runner, and finally overflows from a riser of the upper box, so that the molten metal in the riser feeds a complex casting cavity in the top of the girder. The casting method can guarantee the internal quality of castings, is simple in molding method, is easy in subsequent treatment of the castings, can form the batch production, and is higher in pass percent.

Description

technical field [0001] The invention relates to a girder casting method with a thin-wall cylinder and a casting mold, and belongs to the technical field of girder casting with a complex shape connected with a thin-wall cylinder. Background technique [0002] In construction machinery products, a girder part with a thin-walled cylinder is often used. The girder part needs to be cast. The material is ZM5, the heat treatment state is T5, and the casting type is Class II. The girder is a cylindrical thin-walled part, and the inner cavity is a cylindrical processing surface. The outside of the part is a non-processed surface with a complex structure. The quality requirements are high, and X-ray and fluorescent flaw detection inspections are required for designated parts of castings. [0003] The structure of the above-mentioned girder casting is just opposite to that of the cabin casting, with a length of about 800 mm and a maximum outer diameter of about φ520 mm. The inner cav...

AI Technical Summary

Problems solved by technology

[0003] The structure of the above-mentioned girder casting is just opposite to that of the cabin casting, with a length of about 800mm and a maximum outer diameter of about φ520mm. It is difficult to meet the quality requirements by adopting the casting gravity pouring method of cabin castings

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