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Technical requirements for castings

Castings obtained by casting methods are called castings. So do you know what the general technical requirements for castings are?



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The method of pouring liquid metal into a casting cavity suitable for the shape of the part, and waiting for it to cool and solidify, to obtain the part or blank is called casting. 86qYoYike manufacturer company

Technical requirements for castings86qYoYike manufacturer company

1. The casting tolerance zone is symmetrical to the basic size configuration of the rough casting.86qYoYike manufacturer company

2. No cold partition, cracks, shrinkage holes, penetrating defects and serious incomplete defects (such as under-casting, mechanical damage, etc.) are allowed on the surface of the casting.86qYoYike manufacturer company

3. The castings should be cleaned up without burrs or flashes. The pouring riser on the non-machining indication should be cleaned and flush with the surface of the casting.86qYoYike manufacturer company

4. The casting characters and marks on the non-machined surface of the casting should be clear and identifiable, and the position and font should meet the requirements of the drawing.86qYoYike manufacturer company

5. The roughness of the non-machined surface of the casting, sand casting R, is not more than 50μm.86qYoYike manufacturer company

6. Castings should be cleaned of pouring risers, spurs, etc. The remaining amount of the pouring riser on the non-processed surface should be leveled and polished to meet the surface quality requirements.86qYoYike manufacturer company

7. The molding sand, core sand and core bone on the casting should be cleaned.86qYoYike manufacturer company

8. The casting has inclined parts, and the dimensional tolerance zone should be arranged symmetrically along the inclined plane.86qYoYike manufacturer company

9. The molding sand, core sand, core bone, fleshy, sticky sand, etc. on the castings should be smoothed and cleaned up.86qYoYike manufacturer company

10. The right or wrong type, casting deviation of the boss, etc. should be corrected to achieve a smooth transition and ensure the appearance quality.86qYoYike manufacturer company

11. The wrinkles on the non-processed surface of the casting should be less than 2mm deep, and the spacing should be greater than 100mm.86qYoYike manufacturer company

12. The non-machined surface of the machine product castings needs to be shot peened or roller treated to meet the requirements of the cleanliness Sa2 1/2 level.86qYoYike manufacturer company

13. Castings must be treated with water toughness.86qYoYike manufacturer company

14. The surface of the casting should be smooth, and the gate, burr, sticky sand, etc. should be removed.86qYoYike manufacturer company

15. Castings are not allowed to have casting defects such as cold partitions, cracks, holes, etc. that are detrimental to use.86qYoYike manufacturer company

Technical requirements for forgings86qYoYike manufacturer company

1. The nozzles and risers of each steel ingot should be removed enough to ensure that the forgings are free from shrinkage and serious deflection.86qYoYike manufacturer company

2. Forgings should be forged on a forging press with sufficient capacity to ensure that the forgings are fully forged.86qYoYike manufacturer company

3. Forgings are not allowed to have visible cracks, folds and other appearance defects that affect use. Local defects can be removed, but the cleaning depth should not exceed 75% of the machining allowance. The defects on the non-machined surface of the forging should be cleaned and smoothly transitioned.86qYoYike manufacturer company

4. White spots, internal cracks and residual shrinkage holes are not allowed in forgings.86qYoYike manufacturer company





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