(1) Calculation of riser modulus of wheel hub in investment casting sand casting
Impeller investment casting – sand casting, the hub and spoke can be regarded as the intersection of rod and plate, and the wall thickness coefficient is k = 1.1
Since the top riser is adopted, K is taken as 1.2 in the formula
(2) Calculation of riser modulus of impeller flange in investment casting sand casting
Regardless of the cold rib effect of the impeller, the investment casting sand casting rim and spoke of the impeller can be regarded as the intersection of rod and plate. The rim thickness is 40mm. Considering the large fillet of the intersection between the impeller and rim, it is r40mm, taking a = 50mm, B = 138mm and C = 30mm
Since the top riser is adopted, K in the formula is also taken as 1.2
