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What are the precautions for casting parts?

Today we will talk about the need to pay attention to the processing of casting parts.

1. Casting parts are not allowed to have cold insulation, cracks, shrinkage holes and penetrating defects and severe defect defects (such as under-casting, mechanical damage, etc.) on the surface during processing.

2. The casting parts should be cleaned and free of burrs and flashing. Non-machining indicates that the pouring riser should be cleaned and flush with the surface of the casting.

3. Castings and markings on non-machined surfaces of casting parts shall be legible and the position and typeface shall conform to the requirements of the drawings.

4. The roughness of the non-machined surface of the casting, sand casting R, not more than 50μm.

5. Castings should be removed from pouring risers, flying thorns, etc. The residual amount of the riser on the non-machined surface should be leveled and polished to meet the surface quality requirements.

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6. The molding sand, core sand and core bone on the casting parts should be removed.

7. The casting has a slanted part, and its dimensional tolerance zone should be symmetrically arranged along the inclined surface.

8. The molding sand, core sand, core bone, fleshy, sticky sand on the casting should be smoothed and cleaned.

9. The wrong type, the boss casting, etc. should be corrected to achieve a smooth transition and ensure the appearance quality.

10. Wrinkles on non-machined surfaces of casting parts, depth less than 2mm, spacing should be greater than 100mm.

11. The non-machined surface of the casting parts of the machine product needs to be shot blasted or drum treated to achieve the cleanliness Sa2 1/2 level.

12. Cast parts must be water toughened.

13. After the casting parts are finished, the surface should be smooth, and the gate, burr, sanding, etc. should be cleaned.



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