Patent ID: 9016100
Filing Date: 2015-04-28
Classification: B21B

Abstract:
1. An apparatus for edge rolling of metal plates comprising: a roller mounted in a chock; an edging hydraulic cylinder having a first working area; a further hydraulic cylinder having a second working area smaller than the first working area of the edging hydraulic cylinder; each of the edging hydraulic cylinder and the further hydraulic cylinder having an associated piston, wherein the pistons are mechanically linked to each other such that (a) movement of the edging hydraulic cylinder causes movement of the further hydraulic cylinder and (b) movement of the further hydraulic cylinder causes movement of the edging hydraulic cylinder; a source of pressurised hydraulic fluid and a controllable valve system configured to selectively direct said pressurised hydraulic fluid to the edging hydraulic cylinder and the further hydraulic cylinder to cause movement of the respective associated pistons; a control system programmed to control the controllable valve system between: