What are the causes of common deformation problems in Dongguan precision castings?

The common deformation problem of Dongguan precision castings is actually a shortcoming caused by forging stress, but the key factor causing the deformation of Dongguan precision castings is thermal stress. The thickness of the Dongguan precision casting structure is asymmetrical, resulting in inconsistent cooling of each part and slower cooling (thickness Wall tube and inner layer) have residual tensile stress; cooling speed (thick wall and surface layer) has residual pressure stress. Dongguan precision castings are in a state of stress, trying to change from this unstable state to a stable state, and can spontaneously complete deformation to reduce internal stress.

Let us understand the factors causing the deformation problem of Dongguan precision castings: first, the structural design of Dongguan precision castings is unscientific and the wall thickness is uneven; second, poor cooling and uneven cold shrinkage. Then, the countermeasures to avoid or reduce the deformation problem of Dongguan precision castings are What? I have sorted it out for everyone, mainly including the following aspects.

1. Change the structure so that its structure is as symmetrical as possible and the wall thickness changes as slowly as possible.

2. Change the cooling method and try to cool each position evenly.

3. Improve the structure or stiffened plates of Dongguan precision castings and production process ribs.

4. Improve the settings of pouring equipment.

5. Set up the inner gate location scientifically and rationally to reduce the temperature difference between various parts and prevent the pouring equipment and Dongguan precision castings from interfering with each other.