FIELD: process engineering.
SUBSTANCE: invention relates to hardening of metal sleeves. This device comprises mandrel and roller die arranged to spin and reciprocate along mandrel axis. Roller die comprises at least two rollers arranged to run about their pins that have the larger diameter section.. Said rollers have larger-diameter sections spaced apart through distance larger than two widths of larger diameter section.
EFFECT: higher hardening efficiency.
1 dwg, 1 ex
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