FLAT DIE FOR ROLLING

摘要

PURPOSE:To improve accuracy by making the dedendum of narrow width finishing teeth slightly lower than the dedendum of the finishing tooth group or leading tooth group of the previous stage thereof and acting exclusively the narrow width finishing teeth on the tooth surface of a material to be rolled. CONSTITUTION:A finishing tooth group 14 consisting of plural finishing teeth is formed in succession to a leading tooth group 13 consisting of plural leading teeth having successively increasing dedendum and both groups are disposed to face each other with a material 2 to be rolled in-between. The tooth width of the group 13 is set at the width of the teeth to be formed on the material 2 or above. A series of the finishing teeth 14b of half the number of the teeth to be formed on the material 2 or larger number of the group 14 are formed as narrow width finishing teeth 16 of which the tooth width to act on the material 2 is changed in the range narrower than the width of the teeth to be formed on the material 2. The end of said teeth 16 where the intermeshing with the material 2 begins is set inner in the transverse direction than the end where the intermeshing of the other finishing teeth or leading teeth begins.