Casting Process of Pump Wheel of Tank Hydraulic Torque Converter
The vane of a pump wheel in a kind of tank hydraulic torque converter has very complicated structure and requires high surface quality and dimension tolerance.The pump wheel can only be fabricated by casting process.Through component structure analysis,comparison of different casting processes and experiments,volume pump wheels have been successfully produced using CNC machine tool made metal pattern,ultra fine self-setting resin sand cores and traditional gravity casting process.The quality of the pump wheel castings satisfy the design requirement with casting surface roughness less than 6.4 μm and vane dimension tolerance less than ±2 mm.