Rolling die set

Abstract

To provide a rolling die set that can suppress a raw material to be rolled from deforming as quickly as possible, without requiring a die to be enraged in size and requiring a core bar, in rolling-processing a hollow material.SOLUTION: In a rolling die set, a plurality of line grooves 6 extending in a straight line in a rolling direction in a planar view are formed, in parallel with a predetermined interval in a width direction of each rolling die 1, on processing teeth 5 in a predetermined range in the rolling direction extending from a starting end side of a biting part 2 of the rolling die 1. A plurality of dividing processing teeth 5a are formed, in an aligned state in the rolling direction and in a tooth trace direction, by the line grooves 6. The dividing / processing teeth 5a of each rolling die 1 are formed to positionally deviate in the tooth trace direction with respect to dividing / processing teeth 5a of the other rolling die 1 which is paired with the rolling die. When the raw material W to be rolled is rolled by one half or by two third, the whole of a rolling width of the raw material W to be rolled is processed.SELECTED DRAWING: Figure 2

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