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Ball valve body casting process requirements and features
- Mar 26, 2018 -

In the casting process of ball valve castings, it is first necessary to determine the production conditions, structural requirements, and technical requirements of the castings. Including parts production volume, parts materials, parts of the schematic diagram, the contour of the ball valve contour size. At the same time, the geometrical accuracy, material requirements, and other special technical requirements that ball valve castings must meet are taken into account.

 

The next step is to analyze the casting process of the ball valve castings, mainly based on the technical requirements of the castings to analyze, in order to determine the outline size of the castings, and the corresponding minimum allowable wall thickness. Then also determine the appropriate casting process plan. It includes the choice of modeling and core making methods. If the contour size of the casting is relatively small, and it belongs to small and medium-sized parts and is to be produced in batches, the use of wet clay sand molding is more advantageous.

 

This is because this process is more flexible, and it can improve the production efficiency of ball valve castings. The product has a short production cycle and is easy to organize flow production. It is easy to realize mechanization and automation. It has low material cost and saves drying equipment, fuel, electricity, etc. Can extend the life of the sand box. Therefore, it is possible to use a wet clay sand machine and a metal mold. Hand-made core resin sand.

 

The next step is to determine the casting position and the parting surface of the ball valve casting according to the above requirements, so as to ensure the styling. At the same time, we must also reasonably determine the various parameters of the casting process. Among them are: casting size tolerances, casting weight tolerances, minimum casting holes and slots, and draft angles.

 

In addition to these factors need to be considered, but also to determine the ball valve casting shrinkage. This is because the volume and size of steel castings are generally reduced in the process of solidification and cooling.

 

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