This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: Weight of molten metal (lead) = W m = 1875(11.3) = 21,188 g = 21.19kg Given 1kg = 9.81N, the buoyancy force = 9.81(21.19  3) = 178.4N Chapter 11 11.3.4 True Centrifugal Casting Calculations What rotational speed is required for a Gfactor? D gGF N 2 30 = g N R GF 2 ) 30 ( = N = rotation speed (rev/min) g = acceleration of gravity (9.8 m/s 2 ) D = inside diameter of mold (m) R = inside radius of mold (m) GF = Gfactor Example A true centrifugal casting operation is to be performed horizontally to make copper tube sections with OD = 25 cm and ID = 22.5 cm. What rotational speed is required if a Gfactor of 65 is used to cast the tubing? Answer: Inside diameter of mold D = OD of the casting = 25 cm = 0.25 m 7 . 681 25 . ) 65 )( 8 . 9 ( 2 30 = = N rev/min...
View Full
Document
 Spring '10
 yang

Click to edit the document details