Precision castingThe common deformation problem is actually a shortcoming caused by forging stress, but the key factor that causes the deformation of precision castings is thermal stress. The thickness of the precision casting structure is not uniform, resulting in inconsistent cooling of various parts, and the cooling is relatively slow.(Thick-walled pipe and inner layer) have residual tensile stress; rapid cooling (thick wall and surface layer) has residual compressive stress. For precision castings in a state of stress, try to transform from such an unstable state to a stable state, and the deformation can be spontaneously completed to reduce the internal stress.

Let's take a look at the factors that cause the deformation of precision castings: one is the unscientific structure design of the precision casting, and the wall thickness is uneven; the other is poor cooling and uneven cold shrinkage. So what are the countermeasures to avoid or reduce the deformation of precision castings?? I sorted it out for everyone,mainThere are the following aspects.

1. Change the structure so that the structure is as symmetric as possible, and the wall thickness is changed as slowly as possible.

2. Change the cooling method to make every position as evenly cooled as possible.

3. Improve the structure of precision castings or add ribs and production process ribs.

4. Improve the setting of pouring equipment.

5. The position of the inner gate is set scientifically and reasonably to reduce the temperature difference of each part, and to prevent the problem of mutual restraint between the equipment and the precision casting during the folding.

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