DESIGN OF THE CRUSHER JAW USING HADFIELD STEEL: GATING AND RISERING
Authors: Sadjere E.G, *Ariavie G.O, Emetitiri R.E
The crusher jaw is a wear component for stone crushing and made of Hadfield Steel. It is subjected to high impact loading in operation and hence must be manufactured or cast with minimal shrinkage porosity. Using a 1,100 kg crusher jaw, gating and risering was designed by consideration of the solidification time of the casting, the feedable weight and the feeding range employing the use of Chvorinnov’s rule, Pellini and Bishop’s rules and the Shouzhu new feeding distance rule. After iterating through the process, the design yielded a gating with sprue diameter of 50 mm and four (4) cylindrical risers of diameter 250 mm and height 400 mm. The overall dimension of the crusher jaw was 1650 mm × 1085 mm × 110mm with a tooth depth of 45 mm and back grooves of 20 mm. The crusher jaw also had a calculated weight (mass) of 1100kg. However, due to the casting teeth profile and weight reduction recesses, the risers were combined as oval risers and set as side risers to feed centrally along the teeth axis.
Affiliations: Department of Mechanical Engineering, Faculty of Engineering, University of Benin, Benin City, Nigeria.
Keywords: Hadfield Steel, Gating, Risering, Feeding, Crusher Jaw
Published date: 2017/12/29