Title:
CROWNING DEVICE OF ROLLER LEVELER AND LATERAL DEFLECTION CORRECTING METHOD USING THE DEVICE
Document Type and Number:
Japanese Patent JP3726146
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To set an optimum crowning corresponding to a plate thickness (reaction force) in straightening, to cope with a local change of a frame deflection in a plate biting in process and to prevent a load concentration to a back up roll corresponding to a plate center part.
SOLUTION: In a roller leveler provided with an upper frame 1 to elevate a rolling down cylinder 3 and an upper roll frame 4 to support a straightening roll 6 and a back up roll 7, plural hydraulic crowning cylinders 12 are connected capable of respectively holding down along a width direction of the frame. From a hydraulic force acted to one crowning cylinders 12 of a deflection quantity of an upper frame 1 center, deflection quantities of other parts is obtained through proportional calculation, a holding down quantity required for a respective crowning cylinders 12 is respectively controlled, an appropriate deflection quantity correction is conducted over a whole width of a plate material.
Inventors:
Toru Aoyama
Keiji Yamamoto
Keiji Yamamoto
Application Number:
JP30801997A
Publication Date:
December 14, 2005
Filing Date:
October 22, 1997
Export Citation:
Assignee:
Sumitomo Heavy Industries Ltd.
International Classes:
B21D1/05; (IPC1-7): B21D1/05
Domestic Patent References:
| JP6154857A | ||||
| JP63132722A |
Attorney, Agent or Firm:
Toshikichi Somekawa
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