# US 10,500,619 B2 · Rolling system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,500,619 B2 - Document ID: US10500619B2 - Status: Granted - Kind: B2 - Application number: 15/302,297 - Filed: 2014-04-23 - Published: 2017-02-02 - Granted: 2019-12-10 - Earliest claimed: 2014-04-23 - Assignees: Toshiba Mitsubishi-Electric Industrial Systems Corporation - Applicants: Toshiba Mitsubishi-Electric Industrial Systems Corporation - Inventors: Haruki Inami; Naohiro Kubo - Web page: https://patentgrep.com/patent/US10500619B2 ## CPC - B21B 1/26: by hot-rolling {, e.g. Steckel hot mill} - B21B 37/74: Temperature control, e.g. by cooling or heating the rolls or the product (B21B37/32, B21B37/44 take precedence) - B21B 37/76: Cooling control on the run-out table - B21C 51/00: Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F - C21D 1/42: Induction heating - C21D 11/00: Process control or regulation for heat treatments - B21B 38/006: {for measuring temperature} - B21B 45/004: {Heating the product} - Y02P 10/25: Process efficiency - B21B: ROLLING OF METAL (auxiliary operations used in connection with metal-working operations covered in B21, see B21C; bending by rolling B21D; manufacture of particular objects, e.g. screws, wheels, rings, barrels, balls, by rolling B21H; pressure welding by means of a rolling mill B23K20/04) - B21C: MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL - C21D: MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass C23F17/00; unidirectional solidification of eutectic materials or unidirectional demixing of eutectoid materials C30B) - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A rolling system includes an induction heater, temperature detectors, a finishing mill, and a power setting calculation device. The power setting calculation device generates a temperature distribution pattern in a plate thickness direction of a steel material at a temperature control position in an upstream side. The power setting calculation device calculates a volume average temperature of the steel material at a temperature control position in a downstream side, at a time when the steel material moves to the temperature control position in the downstream side from the temperature control position in the upstream side, based on the generated temperature distribution pattern. Then, the power setting calculation device calculates an electric power necessary for the induction heater so that the calculated volume average temperature follows a target temperature of the steel material at the temperature control position in the downstream side. ## Claims ### Claim 1 A rolling system comprising: an induction heater which heats a material that is conveyed by a conveying table; a first temperature detector which detects a first temperature of the material at a first position upstream from the induction heater; a finishing mill which is provided downstream from the induction heater, and rolls the material; a second temperature detector which detects a second temperature of the material at a second position downstream from the induction heater and upstream from the finishing mill; and a power setting calculation device which includes circuitry, wherein the circuitry: generates a temperature distribution pattern in a plate thickness direction of the material at the first position, based on the temperature detected by the first temperature detector; calculates a volume average temperature of the material at the second position, at a time when the material moves to the second position from the first position, based on the generated temperature distribution pattern; and calculates an electric power necessary for the induction heater so that the calculated volume average temperature follows a target temperature of the material at the second position, wherein the circuitry: divides the material into nodes in the plate thickness direction; calculates a change of a temperature of each node based on radiation cooling, escape of heat due to air convection, escape of heat to a table roll of the conveying table, heat conduction occurring due to a temperature difference between the node and its adjacent node, and a change of a calorific value from the induction heater; and calculates, based on the calculated result, the volume average temperature of the material corresponding to a value obtained by dividing a sum of products of a volume and a temperature of each node by a sum of volumes of each node. ### Claim 2 (depends on 1) The rolling system according to claim 1, further comprising: a speed detector which detects a speed of the material that is conveyed by the conveying table, wherein the circuitry calculates: the volume average temperature over the whole length of the material, by using a preset predicted speed pattern as a conveyance speed of the material, before the material is rolled by the finishing mill; and the volume average temperature over the whole length of the material, by using the speed detected by the speed detector, or using both of the speed detected by the speed detector and the predicted speed pattern, as the conveyance speed of the material, after the rolling of the material by the finishing mill is started. ### Claim 3 (depends on 1) The rolling system according to claim 1, further comprising: a temperature-rise pattern setting determination device for determining setting of a temperature-rise pattern, wherein the temperature-rise pattern setting determination device includes a memory storing information on the temperature detected by the second temperature detector; and the circuitry sets the target temperature of the material at the second position, based on the volume average temperature of the material at the second position, at a time when the material is not heated by the induction heater, and the setting of the temperature-rise pattern determined by the temperature-rise pattern setting determination device. ### Claim 4 (depends on 3) The rolling system according to claim 3, wherein the circuitry calculates the volume average temperature of the material at the second position, at the time when the material is not heated by the induction heater, based on the generated temperature distribution pattern. ### Claim 5 (depends on 3) The rolling system according to claim 3, wherein the second position is a position close to an entry side of the finishing mill; the circuitry divides the material into segments each having a fixed length in a longitudinal direction, and calculates a volume average temperature for each of the segments; and the circuitry sets a target temperature for each of the segments of the material. ### Claim 6 (depends on 1) The rolling system according to claim 1, wherein the circuitry resets a value of an electric power used when the volume average temperature is calculated, and recalculate the volume average temperature, in a case where a difference between the calculated volume average temperature and the target temperature of the material at the second position is outside of a reference range. ### Claim 7 (depends on 1) The rolling system according to claim 1, further comprising: a speed detector which detects a speed of the material that is conveyed by the conveying table, wherein the circuitry calculates a surface temperature of the material at the second position based on the temperature detected by the first temperature detector, the speed detected by the speed detector, and an electric power actually supplied to the induction heater; and corrects a parameter used when the volume average temperature is calculated, based on the calculated surface temperature and the temperature detected by the second temperature detector.