Casting molding process for shell on mine crusher

Abstract

The invention relates to a casting molding process for a shell on a mine crusher. The casting molding process for the shell on the mine crusher comprises the steps that firstly, a hollow actual sample is manufactured; secondly, rib plates and circular beads outside a casting are all made into movable blocks; thirdly, a solid core print is arranged on the lower portion of the hollow actual sample; fourthly, glassfiber reinforced plastics adhere to the inner surface and the outer surface of the hollow actual sample; fifthly, the movable blocks are fixed; sixthly, box molding of the hollow actual sample is performed, and sample plate core assembly molding is adopted for a bottom flange of the casting and a boss; and seventhly, box closing and molten steel casting are performed. In the casting molding process for the shell on the mine crusher, a molding method of the hollow actual sample is adopted for a body structure of the shell on the mine crusher, the casting and molding difficulty is substantially reduced, molding of the casting is made more accurately, box closing is more convenient, the sand mold size controllability is good, the inner and outer surface quality of the casting is effectively guaranteed, the manufacturing period is greatly shortened, and the later-period machining amount is reduced.

Description

technical field [0001] The invention relates to the technical field of large casting castings, in particular to a casting molding process for an upper casing of a mine crusher. Background technique [0002] Mine crusher is equipment for crushing ore, which is widely used in mine production. The upper shell is the main part of the mine crusher and is also a steel casting. Mining crushers undertake the work of crushing ores and materials. The working environment is harsh and it is not easy to disassemble and repair. Therefore, there are extremely strict requirements for the manufacturing quality standards, assembly accuracy, service life and working stability of each component. [0003] Such as Figure 1-Figure 2 As shown, the structure size of the upper shell of the crusher is large, the shape is complex, it has a slope and a circular frustum shape, and there are strict requirements on the trapezoidal slope and wall thickness. The outer surface of the casting of the upper sh...

AI Technical Summary

Problems solved by technology

[0004] In the past, the upper casing of the mine crusher was cast with core molding. Because many sand cores were used, and the inclination angle of the shell sand core was too large, the process was complicated, and it was difficult to ensure the wall thickness and dimensional accuracy.

After casting, it is easy to produce large cracks on the surface of the shell

In addition, when casting a closed box, it is necessary to use a thick column core support to fix the sand core at the sand core with a large inclination angle, which has a great impact on the quality of the upper shell

In the previous production process, it was difficult to ensure the uniform wall thickness, internal and external surface quality and blank contour dimension accuracy of the upper shell of the crusher after casting by using the method of core assembly molding; the casting and finishing production period of a single casting was as long as 8 months Above, poor casting quality directly affects the service life of the equipment, resulting in a lot of waste of resources

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