Method for forging step shaft with electroslag ingots

Abstract

The invention relates to a method for forging a step shaft with electroslag ingots. The method is suitable for forging the step shaft with large step diameter. A dead head end of an electroslag ingot is disposed on a upsetting drain cap for upsetting. The upset dead head end of the electroslag ingot forms a drum-shaped convex face and is elongated, due to the fact that the dead head end is the drum-shaped convex face, the dead head end is less prone to sinking, only a small part of dead head end needs to be cut off at last, pliers handle pressing with a hydraulic press in the original method is omitted, and the method has the advantages that the method is material-saving, utilization rate of forged piece is improved, and production cost is lowered.

Description

technical field [0001] The invention relates to a forging method, in particular to a forging method for an electroslag ingot forging a stepped shaft which is suitable for a stepped shaft with a large step diameter. Background technique [0002] In the forging method of the existing electroslag ingot stepped shaft, such as figure 1 As shown, the electroslag ingot is cooled by the molten pool to form a riser end 101 after the ingot casting is completed. The riser end 101 is a concave surface formed by the cooling and shrinkage of the solution, and then forged. As the forging ratio increases, the concave surface deepens. Eventually shrinkage holes are formed, such as figure 2 As shown, in order to avoid shrinkage holes, first use the manipulator to press the electroslag ingot with the riser end out of the clamp 102, in order to ensure the forging ratio, as image 3 As shown, then place the pliers 102 in the center of the upsetting drain plate 2, upsetting the electroslag in...

AI Technical Summary

Problems solved by technology

[0002] In the forging method of the existing electroslag ingot stepped shaft, such as figure 1 As shown, the electroslag ingot is cooled by the molten pool to form a riser end 101 after the ingot casting is completed. The riser end 101 is a concave surface formed by the cooling and shrinkage of the solution, and then forged. As the forging ratio increases, the concave surface deepens. Eventually shrinkage holes are formed, such as figure 2 As shown, in order to avoid shrinkage holes, first use the manipulator to press the electroslag ingot with the riser end out of the clamp 102, in order to ensure the forging ratio, as image 3 As shown, then place the pliers 102 in the center of the upsetting drain plate 2, upsetting the electroslag ingot through a hydraulic press to ensure the forging ratio, and finally pull it out through the manipulator, because the concave surface of the riser end has been forged into a pliers , After the final step shaft is completed, both the clamp handle and the riser end are cut off, but this method wastes material, the utilization rate of forgings is low, and the production cost is greatly increased

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