A crown feedback method that takes into account wave shape adjustment between racks
A technology between racks and racks, which is applied in the field of crown feedback that takes into account the wave shape adjustment between racks, can solve the problems of large crown error of strip steel, reduce crown and flatness errors, reduce overall The effect of convexity error
Active Publication Date: 2021-07-23
SHOUGANG CORPORATION
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[0005] The embodiments of the present invention provide a crown feedback method that takes into account the adjustment of the wave shape between racks, effectively solving the technical problem of large strip crown errors caused by no crown detection in the prior art, and achieving the goal of ensuring that each rack is in good condition. Under the premise of flatness, the real-time online detection and adjustment ability of the crown of the rolling mill can be maximized, and the technical effect of reducing the crown and flatness error of the hot continuous rolling strip
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Embodiment 1
[0034] An embodiment of the present invention provides a crown feedback method that takes into account wave shape adjustment between racks, and is characterized in that the method includes:
[0035] Step 110: Obtain the measured absolute crown C at the outlet of the F7 stand of the finishing mill for each sample section on the strip m ; Step 120: Calculate the convexity deviation ΔC of each sample section on the strip; further, the calculation formula for calculating the convexity deviation ΔC of each sample section on the strip is: ΔC=C m -C t Wherein, the ΔC is the convexity deviation, um; C m is the measured absolute convexity of the outlet of the F7 rack, um, obtained by testing the convexity testing instrument; C t is the target convexity, um.
[0036] Specifically, first obtain the measured absolute crown C m , and then through the formula: ΔC=C m -C t Calculate the crown deviation ΔC of each sample segment on the strip, wherein the ΔC is the crown deviation, um; C...
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The invention discloses a crown feedback method that takes into account the wave shape adjustment between stands. The method includes: Step 1: Obtain the actual measured absolute crown C at the exit of the finish rolling unit F7 stand of each sample section on the strip steel m ; Step 2: Calculate the crown deviation ΔC of each sample segment on the strip; Step 3: Process the crown deviation ΔC through the P+I controller to obtain the processed crown deviation ΔC R ; Step 4: Convexity deviation ΔC after processing R Allocation is carried out and allocated to other rolling mills except the last stand; Step 5: Calculate the bending force adjustment ΔF of each stand of the finishing rolling group bn . Through the present invention, the technical problem of large strip crown error caused by no crown detection in the prior art is solved, and the real-time on-line detection and adjustment ability of the crown of the rolling mill can be maximized under the premise of ensuring good flatness of each stand , reducing the technical effect of the crown and flatness errors of the hot continuous rolling strip.
Description
technical field [0001] The invention relates to the technical field of hot-rolled strip shape control, in particular to a crown feedback method that takes into account wave shape adjustment between stands. Background technique [0002] Hot-rolled coils use slabs as raw materials. After being heated, they are made into strips by the roughing mill and the finishing mill. The hot steel strip from the last finishing mill is cooled to the set temperature by laminar flow. Machine rolled into steel strip coils, the cooled steel strip coils are processed into steel plates, flat coils and slitting steel strip products through different finishing lines according to the different needs of users. Due to the high strength, good toughness, easy processing and good weldability of hot-rolled steel products, they are widely used in manufacturing industries such as ships, automobiles, bridges, construction, machinery, and pressure vessels. With the increasing maturity of new technologies for...
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IPC IPC(8): B21B37/28B21B38/02
CPCB21B37/28B21B38/02
Inventor 刘子英王策王炳奎龚波张长利李旭东张喜榜张臣谈霖
Owner SHOUGANG CORPORATION