Patent application number | Description | Published |
20090045557 | Method of Arranging and Setting Spray Cooling Nozzles and Hot Steel Plate Cooling Apparatus - The present invention relates to an apparatus for cooling hot steel plate applied for controlled cooling of hot steel plate, obtained by hot rolling, while processing it constrained by constraining rolls and obtaining a steel material excellent and uniform in shape characteristics and provides a method of arranging and setting spray nozzles enabling uniform cooling in a direction perpendicular to processing and provides a method of arranging and setting spray nozzles of a spray cooling apparatus using two or more types of nozzles differing in amounts of water and spray regions to obtain a broad range of adjustment of amounts of water, wherein the spray nozzles are arranged so that a value of an n power of the impact pressures of the cooling water sprayed from the spray on the cooling surface integrated in the processing direction between pairs of constraining rolls becomes within −20% of the highest value in the direction perpendicular to processing,
| 02-19-2009 |
20090121396 | Method of Cooling Steel Plate - A method of cooling both surfaces of steel plate, while being constrained and conveyed between pairs of constraining rolls, by coolant sprays from top/bottom surface nozzle groups between pairs of constraining rolls, which method of cooling steel plate stably secures precision of cooling control from a start of cooling to an end of cooling in a steel plate cooling region between pairs of constraining rolls so as to uniformly cool the top and bottom surfaces of the steel plate and thereby stably secure the steel plate quality and cool the steel plate down to a target temperature with a good precision, specifically comprises dividing a steel plate cooling region between pairs of constraining rolls in which groups of top and bottom surface nozzles are arranged into at least a spray impact part region and spray non-impact part regions in a steel plate conveyance direction or in the steel plate conveyance direction and width direction, predicting a heat transfer coefficient for each divided region in advance, computing a predicted temperature history of the steel plate based on this predicted value, and setting and controlling amounts of sprayed coolant on the spray impact part regions by the groups of top and bottom surface nozzles. | 05-14-2009 |
20100219565 | Cooling Apparatus of Hot Steel Plate, Cooling Method of Hot Steel Plate, and Program - An apparatus for controlled cooling of hot steel plate while constraining and conveying the plate by constraining rolls horizontally which is inexpensive and enabling continuous control of the cooling ability over a broad range, that is, a cooling apparatus for spraying hot steel plate hot rolled and transferred between pairs of constraining rolls with cooling water from pluralities of lines of spray nozzles so as to cool the same, which apparatus has lines of gentle cooling spray nozzles and lines of strong cooling spray nozzles with different orifice shapes and enables continuous control of the cooling ability over a broad range due to the fact that a maximum cooling water impact pressure integrated value of the lines of gentle cooling spray nozzles and a minimum cooling water impact pressure integrated value of the lines of strong cooling spray nozzles are continuous. | 09-02-2010 |
20100288007 | ROLLING MILL AND ROLLING METHOD FOR FLAT PRODUCTS OF STEEL - The object is to eliminate the difference in offset of work rolls at the upper and lower and left and right of the rolling mill occurring in the kiss roll state of the zero point adjustment work before rolling or during rolling and eliminate the problem of warping of the flat products or meander or camber due to the thrust force acting between the work rolls and backup rolls. | 11-18-2010 |
20110000271 | ROLLING MILL AND ROLLING METHOD FOR FLAT PRODUCTS OF STEEL - The object is to strictly eliminate the difference in offset of work rolls at the upper and lower and left and right of the rolling mill occurring in the kiss roll state before rolling or during rolling and eliminate the problem of warping of the flat products or meander or camber due to the thrust force acting between the work rolls and backup rolls. | 01-06-2011 |
20110041580 | ROLLING MILL FOR A PLATE OR A SHEET AND ITS CONTROL TECHNIQUE - The present invention provides a rolling mill of a plate or a sheet which eliminates rolling trouble due to warping of the rolled material and wavy shaped flatness defects running through the plate or sheet width direction such as “waviness”, “full waves, and “small waves” by providing a pair of a top and bottom work rolls, a pair of electric motors independently driving the pair of rolls, and control means for controlling one electric motor using the roll rotational speed as a control target value and controlling the other electric motor using the rolling torque applied to the rolled material from the work roll driven by that electric motor becoming substantially constant as a control target and using the drive torque as a control amount and a control technique of such a rolling mill of a plate or a sheet. | 02-24-2011 |
20110233831 | Method of arranging and setting spray cooling nozzles and hot steel plate cooling apparatus - The present invention relates to an apparatus for cooling hot steel plate applied for controlled cooling of hot steel plate, obtained by hot rolling, while processing it constrained by constraining rolls and obtaining a steel material excellent and uniform in shape characteristics and provides a method of arranging and setting spray nozzles enabling uniform cooling in a direction perpendicular to processing and provides a method of arranging and setting spray nozzles of a spray cooling apparatus using two or more types of nozzles differing in amounts of water and spray regions to obtain a broad range of adjustment of amounts of water, wherein the spray nozzles are arranged so that a value of an n power of the impact pressures of the cooling water sprayed from the spray on the cooling surface integrated in the processing direction between pairs of constraining rolls becomes within −20% of the highest value in the direction perpendicular to processing,
| 09-29-2011 |
20120067470 | COOLING METHOD AND COOLING DEVICE OF HOT-ROLLED STEEL STRIP - The present invention provides a method of cooling a hot-rolled steel strip which has passed through a finishing rolling, including: cooling the hot-rolled steel strip from a first temperature of not lower than 600° C. and not higher than 650° C. to a second temperature of not higher than 450° C. with cooling water having the water amount density of not lower than 4 m | 03-22-2012 |
20120174645 | COOLING APPARATUS AND COOLING METHOD FOR HOT ROLLING - A cooling apparatus for hot rolling is installed on a downstream side of a finishing mill of a continuous hot rolling mill, and cools a steel sheet rolled by the finishing mill while being conveyed. The cooling apparatus includes first pinch rolls which, during an interval when the steel sheet fed out from a final stand of the finishing mill moves from a position of the final stand to a position where a surface temperature of the steel sheet reaches 850° C. or less, pinch the steel sheet while applying tension of 3.9 MPa or greater. | 07-12-2012 |
20120306130 | COOLING METHOD AND COOLING DEVICE OF HOT-ROLLED STEEL STRIP - The present invention provides a method of cooling a hot-rolled steel strip which has passed through a finishing rolling, including: cooling the hot-rolled steel strip from a first temperature of not lower than 600° C. and not higher than 650° C. to a second temperature of not higher than 450° C. with cooling water having the water amount density of not lower than 4 m | 12-06-2012 |
20140076018 | METHOD FOR MANUFACTURING STEEL SHEET - A method for manufacturing a steel sheet of the invention includes a hot-rolling process in which a steel material is hot-rolled using a finishing mill so as to obtain a hot-rolled steel sheet; and a cooling process in which the hot-rolled steel sheet is cooled. The hot-rolling process includes a target steepness-setting process in which a target steepness of the edge wave shape is set based on first correlation data indicating a correlation between a steepness of the edge wave shape of the hot-rolled steel sheet and a temperature standard deviation Y; and a shape-controlling process in which operation parameters of the finishing mill are controlled so as to match the steepness of the edge wave shape with the target steepness. | 03-20-2014 |
20140283573 | ROLLING APPARATUS FOR FLAT-ROLLED METAL MATERIALS - A rolling apparatus for flat-rolled metal materials including a pair of upper and lower work rolls | 09-25-2014 |
20140305179 | ROLLING APPARATUS FOR FLAT-ROLLED METAL MATERIALS | 10-16-2014 |