(1) Impeller investment casting – sand casting weight
The weight of each impeller by investment casting sand casting is about 1.5kg, and the total weight of 54 impellers by investment casting sand casting is 1.5 kg × 54=81kg
Impeller investment casting – sand casting wheel hub, spoke and rim weight WC = [π × zero point two five two × 0.138－π × zero point zero three five two × 0.138－π × (0.2082－0.0852) × 0.10] × 7800≈121kg
Impeller investment casting – sand casting weight = 81 + 121 = 202kg
(2) Impeller investment casting – sand casting riser weight
Impeller investment casting sand casting riser weight = 25 + 21 × 3=88kg
(3) Impeller investment casting sand casting process yield
Impeller investment casting sand casting process yield = 202 / 202 + 88 × 100%=69.6%
The production rate of impeller investment casting sand casting process is controlled within the normal range.