TW201217077A - to correct rolling slab arc shape and offset in real time in order to improve the offset/skew problems of the rolling slab during the rolling process - Google Patents

Abstract

The present invention relates to a rolling slab offset/skew adjustment method, which includes the following steps: (a) calculating a rolling slab offset/skew amount; (b) obtaining difference in rolling forces at two sides of the rolling slab width; (c) calculating a rolling slab adjustment information based on the rolling slab offset/skew amount and the difference in rolling forces; and (d) adjusting the rolling slab offset/skew according to the rolling slab adjustment information. The rolling slab offset/skew adjustment method of this invention uses rolling slab images and rolling force deviation for the offset/skew adjustments of the rolling slab. In this way, it provides function of correcting the rolling slab arc shape and offset in real time in order to improve the offset/skew problems of the rolling slab during the rolling process.

Description

201217077 VI. Description of the invention: [Technical field to which the invention pertains] In particular, a rolling offset/the present invention relates to a method for adjusting the curling adjustment method. [Prior Art] In the conventional hot-dry steel strip rolling process, after the steel embryo is heated by the heating furnace, the rough rolling mill and the finishing mill are continuously rolled to control the outer dimensions of the steel strip, and then the laminar cooling system is used to control the steel. The mechanical properties of the belt, and finally coiled into a cylindrical steel coil. However, during the rolling process of the hot-rolled steel strip, the steel and the steel strip will be offset and shape due to the influence of the temperature uniformity and the processing of the horizontal and vertical milk machines. Twisted: This will result in a coil with a poorly rolled shape and a surface defect. - and 'Because of the high temperature process and moisture, it is very difficult to detect the twisted shape of the steel strip and to make the necessary corrections in real time. When the steel strip is deflected and twisted, when the twisted steel strip passes through the water

In the case of a flat rolling mill, different rolling forces are caused on both sides of the width, and the flatness of the appearance of the steel strip changes. The following is a list of prior art papers on rolling offset/twist measurement and is briefly described. Prior to the prior art document (U.S. Patent No. 6,129,136): Practice: Measure the position of the steel strip at the nip exit of the continuous casting steel strip process and correct its direction of travel. It is also only possible to measure the m, point, and only the results of the Twin Roll Caster process for feedback correction. 15074I.doc 201217077 Prior Art Document 2 (US Patent US6766934): : Method: The L machine and the nip roll in the continuous casting steel strip process can be combined with the crushing force measured by the rolling mill. The shortcomings of the traveling side of the positive steel strip: it can only be applied to the Twin (10) process, and can only be corrected by the ~, - σ fruit. b is the prior art document 3 (US Patent (; 8729234〇): reciprocating steel plate A model measuring device is arranged behind the machine to control the thickness on both sides in the width direction. Disadvantages··The correction method of the travel deviation of the steel strip is not considered. = It is necessary to provide an innovative and progressive method for adjusting the offset of the rolling mill to The invention solves the above problems. SUMMARY OF THE INVENTION The present invention provides a method for adjusting the offset/twist of the rolling mill, comprising the following steps: (a) measuring the offset of the rolling mill/turning amount of the rolling stock, and (b) obtaining the milk embryo The difference of the dry extension force on the two sides of the width; (4) calculating an adjustment information of the rolling mill according to the offset/twist amount of the rolling mill and the difference in the ductility; and (4) adjusting the offset of the blank according to the adjustment information of the milk embryo/ The dry embryo offset/twist adjustment method of the present invention utilizes the L-embryo The image and the dry force deviation amount 'adjust the rolling offset/twist adjustment, which can provide the function of adjusting the curvature and offset of the rolling embryo in time to improve the deviation/twist of the dry embryo during travel. Problem. % [Implementation]

1 is a flow chart showing a method for adjusting the offset/twist of the blank of the present invention; FIG. 2A 150741.doc [S3 201217077 shows a plan view circle of each device configuration for performing offset/twist adjustment of the present invention; FIG. 2B shows the present invention. Side view of each device configuration for offset/twist adjustment FIG. 3 shows a schematic view of a first embodiment of the image of the embossing machine and the calculation of the offset/twist of the embossing. Referring to the reference figure 丨 to FIG. 3, first referring to the step su, the calculation-rolling offset is set, and the twisting amount s is located at a relative position above the rolling μ (for example, the steel strip) (such as the upper part of each group of the female roller 2). The complex array laser unit 3 and the at least one image capturing unit 4, in the present embodiment, each of the lasers 3 includes two lasers 31, 32, 33. Three lasers 31 ^ 32, 33 of each laser unit 3 are respectively disposed on the left side, the center and the right side of the blank 1 to form a reference. The at least one image capturing unit 4 is configured to take the image of the milk embryo I, and the image capturing direction thereof may be the same as the rolling direction (such as the dotted line 8 or 2) or opposite to the rolling direction (such as the solid line gossip). Show). The side of the width of the slab 1 is further provided with a side guide 5 for controlling and guiding the embossing. In the embodiment, the step su includes: forming a first side reference reference: a reference frame ! The ^2 and a second side reference reference L3 (formed by the laser singles 3, respectively) are disposed on the first side reference datum L1 and the second side reference datum. Between the center reference frame L2 is substantially parallel to the center line of the length direction of the milk embryo 1; the drawing-rolling image 6 (for example, taking a magnifying image by a digital camera), and setting a rectangular range 7 ' The rectangular range 7 forms an intersection point P1, P2 with the first side (4) of the embossed image 6, and forms a 帛-intersection P3, p4 with the second side 62 of the embossed image 6, the second side 62 corresponding to the first side 61; and according to the first side reference d, the center reference d2, the second side reference L3, the first-intersection P, ? 2 and the second intersection

EI 150741.doc 201217077 P3, P4' calculate the rolling offset/twist amount. In this embodiment, the first step is calculated according to the first midpoint Pd of the first inter-points Pi, 6 and the second midpoint Pw of the second intersections P3, Pi in the step s11. a third midpoint Pc′ between the midpoint Pd and the second midpoint Pw and according to the first side reference reference L1, the central reference reference L2, the second side reference reference L3, the first midpoint pD, the The second midpoint pw and the second t point Pc respectively calculate the first midpoint Pd, the second midpoint pw and the third midpoint Pc and the first side reference d, the central reference d2 And the distance between the second side reference reference L3: SD, SW, SC, to calculate the rolling offset/twist amount. Fig. 4 is a view showing a second embodiment of the image of the embossed image of the present invention and the calculation of the offset/twist of the embossing. With reference to Figures 1, 2 and 4, it is noted that in other embodiments, step SU may include forming a first side reference reference L1, a center reference reference! ^2 and a second side reference d3, the slab 1 is disposed between the first side reference d丨 and the second side reference L3 'the center reference datum 12 is substantially parallel to the slab a center line of the length direction; extracting a blast image 6 and setting a rectangular range 7, the width of the rectangular range 7 being greater than the width of the slab; and a line segment 8 within the rectangular range 7 (preferably a first intersection Pd' and a second intersection Pw corresponding to a first side 6丨 and a second side 62 in the width direction of the embossed image 6; according to the first side reference The blank offset/twist amount is calculated by the reference L丨, the center reference datum 2, the second side reference datum L3, the first intersection point, and the second intersection point Pw. Wherein, according to the first midpoint PD and the second midpoint Pw>, a third midpoint Pc is calculated therebetween, and 15074I.doc • 6 - [S] 201217077 is based on the first side reference reference L1, 13⁄4 center reference The first intermediate point Pd and the second midpoint Pw are respectively calculated by the reference L2, the second side reference reference L3, the first midpoint ρ〇, the second midpoint 〜., and the third midpoint pc And the first reference base L2 and SW' 'SC· to calculate the distance between the two midpoints Pc and the first side reference reference L1 'the second side reference d3: SD, _ the offset offset / twist amount. Referring to FIG. 1 to FIG. 3 again, referring to step S12, the width of the slab is obtained.

The difference in rolling force between the two sides. In the towel of the present embodiment, the difference in rolling force between the two sides (the first side and the second side) of the width of the slab 1 is measured by a load meter 9. Referring to step S13, a roll adjustment information is calculated according to the rolling offset/twist amount and the rolling force difference. Referring to Figures 1, 2 and 5, in the present embodiment, in step 3丨3, the rolling offset/twist amount is passed through a first low-pass filter 10, followed by a first A proportional-integral-derivative (PID) controller and a time delay controller 丨2 perform calculations to calculate a first PID operation result, and/or the milk extension force difference (by the dry embryo 1 side-side And the second side of the milk duct force calculation) is calculated by a second low-pass filter 13 and then by a second proportional_integral-derivative controller μ, and a second PID operation result is calculated, and according to the The first HD operation result and/or the first PID calculation result are used to calculate the blank adjustment information. In this embodiment, the first PID operation result and the second pm operation result are respectively subjected to a first weighting operation and a first weighting operation by a weighting operator 15, and the weight of the first weighting operation and the first The weight of the weighting operation of the two weighting operations is 1. By the results of the two independent control weighting calculations as shown in Fig. 5, it is possible to adjust the roll level to achieve the instantaneous adjustment of the travel [S] J5074I.doc 201217077 offset 1 and the amount of twist. Further, depending on the material of the slab 1 and the roll 2, the surface friction coefficient, and the traveling speed of the slab 1, the delay control time of the offset/twisting position of the slab 1 to the position of the roll 2 can be calculated. Finally, the reference step S14' adjusts the offset/twist of the dairy 1 based on the nipple adjustment information.

The method for adjusting the offset/twist of the embossing of the invention can be applied to the hot rolling process, the cold rolling process and the continuous casting strip process of the metal sheet, the strip and the foil, for example, the heat applied to the steel sheet and the steel strip. Rolling pass and cold rolling pass. The method for adjusting the offset/twist of the embossing of the invention utilizes the image of the embossing and the deviation of the rolling force to adjust the offset/twist of the rolling, thereby providing an immediate adjustment of the curvature and offset of the slab 1 Function to improve the rolling of the embryo] The problem of offset/twisting during travel. The above-described embodiments are merely illustrative of the principles and functions of the present invention and are not intended to limit the scope of the present invention. The scope of the invention should be as set forth in the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart showing a method for adjusting the offset/twist of the blank of the present invention; FIG. 4 shows a plan view of the apparatus for performing the offset/remaining (four), showing a view of the present invention; FIG. 3 is a schematic view showing the first embodiment of the image of the embossing of the present invention and the calculation of the offset/turning amount of the embossing 150741.doc 201217077; FIG. 4 shows the 撷 of the present invention. A schematic diagram of a second embodiment of taking the image of the embossed and calculating the offset/twist of the embossing; and FIG. 5 is a block diagram showing the grading/twist adjustment logic of the present invention. [Main component symbol description]

1 Rolling blank 2 Roller 3 Laser unit 4 Image capturing unit 5 Side guide 6 Rolling image 7 Rectangular range 8 One of the rectangular segments 9 Load meter 10 First low-pass filter 11 First ratio - integral - Differential controller 12 time delay controller 13 second low pass filter 14 second proportional-integral-derivative controller 15 weighting operator 31, 32, 33 laser 61 first side of the breast image 62 The second side Al, A2 take the image direction [S] 150741.doc 201217077

Ll first side reference reference L2 center reference reference L3 second side reference reference Pi 'P2 first intersection point P3, P4 second intersection point Pc third application point Pd first midpoint P w second midpoint SC Pc and L2 Distance between SD PD and L1 sw Pw and distance between L3 [s] 150741.doc -10-

Claims (1)

201217077 VII. Patent application scope: 1. A method for adjusting the offset/twist of the rolling mill, comprising the following steps: (a) calculating a rolling offset/twisting amount; (b) obtaining a rolling width on both sides of the rolling blank (c) calculating an adjustment information of the rolling mill according to the offset/twist amount of the rolling mill and the difference of the rolling force; and (d) adjusting the offset of the rolling stock according to the adjustment information of the rolling blank Twist. 2. The method for adjusting the offset/twist of the 1st item 1 wherein step (a) comprises the following steps: (al) forming a first side reference, a center reference, and a second reference The rolling system is disposed between the first side reference datum and the second side reference datum, the center reference datum being substantially parallel to a center line of the length direction of the slab; (a2) drawing an embossing Image, and setting a rectangular range, the width of the rectangular range is greater than the width of the embossing; (a3) a line segment within the rectangular range and a corresponding one of the side edges of the embossed image and H Forming a first intersection and a second intersection; and (d) calculating the embryo according to the first side reference, the center reference, the second reference, the first intersection, and the second intersection Shift/twist amount. Human 3. If the dry embryo offset/twist adjustment method is requested, the following steps are performed: (al) forming a - first side reference, a central reference, and a second 150741.doc [S3: 201217077 side reference a reference 'the rolling system is disposed between the first side reference datum and the second side reference datum, the center reference datum being substantially parallel to a center line of the length direction of the slab; (a2) taking a rolling An image of the embryo, and a rectangular range is formed, the rectangular range forming a first intersection with the first side of the embossed image, and forming a second intersection with the second side of the embossed image, the second a side edge corresponding to the first side; and (a3) according to the first side reference datum, the center reference datum, the second The side reference datum, the first intersection point, and the second intersection point are used to calculate the rolling offset/twist amount. 4. The method according to claim 3, wherein in step ^3), one of the first midpoints between the first intersections and the second midpoint of the second intersections Calculating a third midpoint between the first midpoint and the second midpoint, and according to the first side reference reference, the central reference reference, the second side reference reference, the first midpoint, the first At the second midpoint and the third midpoint, the rolling offset/twist amount is calculated. 5. The method according to claim 1, wherein in the step (c), the dry embryo offset/twist amount is passed through a first low pass chopper and then passed through - the first example The boring tool differential (PID) controller and the time delay controller perform calculations, calculate the -PIDif calculation result, and/or the zwill force difference value passes through a second low pass chopper and then pass through a second Proportional_Integral/Derivative Control: Performs an operation to calculate a second piD operation result, and calculates the billet adjustment information based on the first operation result and/or the second pm operation result I. 150741.doc -2- [S] 201217077 6. The milk embryo offset/twist adjustment method of claim 5, wherein the first pm difference result and the second PID operation result are separately subjected to a _ weighting operator Performing a -th-weighting operation and a second weighting operation, the sum of the weight of the first weighting operation and the weight of the second weighting operation is 7. 7. The dry embryo offset/twist adjustment method of claim 5 In step (4), the method of adjusting the dry roll level according to the result of the weighting calculation is additionally included to instantly adjust the offset and the twist amount of the rolling in progress. 8. The method for adjusting the offset/twist of the blasting of claim 5, which is based on the material of the dry embryo and the rolling material, the surface friction wire and the rolling speed, and calculates the offset/twist position of the milk embryo to reach the roll. Location - Delay control time. 9. If the method of adjusting the offset/twist of the rolling mill is requested, it is applied to the hot rolling process, the cold rolling process and the continuous casting process of the metal sheet, the strip, the blanking. • The method for adjusting the offset/twist of the blank of claim 9 is applied to the hot rolling and cold rolling of steel sheets and strips. 150741.doc m