Forming method of ring steel castings

Abstract

The invention belongs to the technical field of casting, and in particular relates to a forming method of a ring type steel casting. The outer ring surface is formed by the external sand core, and the internal sand core digital model and the external sand core digital model are established; the internal sand core is divided into several internal sand core modules at the same angle, and the external sand core is divided into A number of external sand core modules; make core box one for making the internal sand core module, and make core box two for making the external sand core module; make the core box one and the core box two according to the front of the core box The quicksand, double-sided quicksand, quicksand volume, casting surface, and contour surface are divided into several core box modules, and the material of the core box modules is selected according to the extrusion force of the molding sand. Adopting the molding method of the invention can reduce the molding cost, increase the strength of the mold, reduce the deformation and burning loss of the lost foam, and ensure the quality of the semi-finished casting.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a forming method of a ring type steel casting. Background technique [0002] Ring steel castings belong to rotary castings. Due to the structural characteristics of thin wall thickness and large changes in casting surface, the general section wall thickness is 50mm-130mm, and its diameter is φ3000mm-φ6000mm. Therefore, it is impossible to make a real sample mold during casting. The method of core molding, that is, making core box-core making-core assembly-quick sand molding-pouring, there are two methods of mold making, method one, the core box is made of wooden materials, the disadvantage is that the cost of wooden core boxes is high, and the production cycle is long. It is not suitable for mold production of ring castings; Method 2, the core box is made of lost foam material, which has the advantages of low molding cost and simple operation, but the strength of the ...

AI Technical Summary

Problems solved by technology

[0002] Ring steel castings belong to rotary castings. Due to the structural characteristics of thin wall thickness and large changes in casting surface, the general section wall thickness is 50mm-130mm, and its diameter is φ3000mm-φ6000mm. Therefore, it is impossible to make a real sample mold during casting. The method of core molding, that is, making core box-core making-core assembly-quick sand molding-pouring, there are two methods of mold making, method one, the core box is made of wooden materials, the disadvantage is that the cost of wooden core boxes is high, and the production cycle is long. It is not suitable for mold production of ring castings; Method 2, the core box is made of lost foam material, which has the advantages of low molding cost and simple operation, but the strength of the lost core box is low, and the uneven amount of sand in the quicksand process causes deformation, and each core box It is necessary to make multiple sand cores, and there will be extrusion deformation every time the sand flows, resulting in a 4mm to 10mm difference in the size of the casting cavity, and defects such as misalignment and drape in the core assembly process. In addition, the resin curing agent reacts during the molding process to generate heat. Burning on the surface of the lost foam reduces the surface quality of the mold and increases the amount of maintenance

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