Ring rolling mill and method for manufacturing ring rolled material
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United States of America Patent
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May 14, 2019
Grant Date -
Oct 6, 2016
app pub date -
Mar 29, 2016
filing date -
Mar 31, 2015
priority date (Note) -
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status (Latency Note)
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Abstract
A ring rolling mill includes: a rotary drive main roll and a mandrel roll, which are for reducing the thickness of and rolling a ring-shaped material from the radial direction; a pair of rotary drive axial rolls for reducing the thickness of and rolling the ring-shaped material from the axial direction; a measuring roll for measuring the diameter of the ring-shaped material during rolling; and a speed control unit for controlling the speed of the axial rolls. The speed control unit is configured to repeat measuring the diameter at predetermined time intervals Δt and comparing a measurement value Lt of the diameter at time t and a measurement value Lt+Δt of the diameter at time t+Δt, and the speed control unit is further configured to maintain the speed of the axial rolls unchanged upon the result of the comparison being Lt+Δt
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