The investment casting technique of the turbine guide vanes with structural characteristics

such as double integral-cast

hollow gas cooling and directional column crystal

was investigated.The results show that

integrally cast structure can be realized by welding blade wax patterns in the pattern design and manufacture.By the group welding tool

it is not only realized the welding of the single blade wax pattern

but also meet the relative position requirements between each welded single blade wax pattern.Based on the reasonable gating system design and selected directional solidification parameters

the problem of the columnar growth in the directional solidification of the twin blade was solved.Automatic control and measurement of the profile

passage point

bending and torsion control point as well as throat area of the twin blade can be achieved by using the coordinate measuring machine.