FIELD: metallurgy.
SUBSTANCE: proposed tool comprises working driven rolls fitted at feed angle and rolling-off angle, mandrel with nozzle extending behind the ramp and rigidly fitted on rotary bar, i.e. arbour bar. Higher efficiency of processing tool with Pilger mills is ensured by equipping said tool with extra mandrel. The latter is fitted on arbour bar, behind the main arbour, and has two degrees of freedom, i.e. revolution and sliding over arbour bar against the stop. It consists of four sections with their profile is specified by definite mathematical equations.
EFFECT: lower production costs of large-diameter commercial and foundry pipes.
4 cl, 2 dwg, 1 tbl
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