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Factors Influencing Accuracy of Castings
2016-03-02

In the past, if the alliance of castings has been simulated, the mould has not been advised or it has been advised as adamant while the abuttals archetypal amid casting and mould has been considered. In qualitative assay or semi-quantitative analysis, these assumptions may be reasonable. However, for after simulation of the dimensional accurateness of attention castings, which is a quantitative problem, these simplifications are no best accurate. The abuttals archetypal amid casting and mould anon influences the accurateness of after simulation of alliance for attention castings.

1 The effects of mold on linear shrinkage of castings

2 The influence of casting temperature: the higher the pouring temperature, greater shrinkage, low pouring temperature, shrinkage is smaller, the pouring temperature should be appropriate.

3 The influence of the casting structure:

Casting wall thickness, shrinkage rate is large, thin wall castings, the shrinkage rate is small.

Free shrinkage, hinder the little shrinkage.

4 Casting structure

Casting thickness, shrinkage, casting attenuate wall, baby shrinkage.

Freedom shrinkage, arrest baby shrinkage.

5 The influence of the casting material:

Materials of carbon content is higher, the line of the smaller shrinkage rate, the lower the carbon content, the line, the greater the shrinkage rate.

Common casting contraction of the material

In general, attention casting locations dimensional accurateness is afflicted by anatomy of casting, casting material, moulding, carapace making, roasting, cloudburst the access of assorted factors, such as any one hotlink set, absurd operation can accomplish the Casting abbreviating amount of change, has led to the aberration of ambit accurateness of castings and requirements.