Control method for improving cold-rolled strip steel quality by utilizing automatic diameter control for eliminating indentation
An automatic diameter control and cold-rolled strip technology, which is applied in the control field of the coiling process unit, can solve the problems affecting the positioning accuracy of the strip head, synchronization error, unstable control effect of the strip head indentation length, etc., to improve the surface of the strip steel Indentation, effect of reducing indentation length
Inactive Publication Date: 2014-07-16
BAOSTEEL STAINLESS STEEL
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Problems solved by technology
Due to "different types of strip steel have different bending degrees, the calculated length of the strip head tracking and the actual strip steel running length will have a synchronization error, resulting in inaccurate positioning; if the strip steel is oiled, the coiler will be within the time limit when the tension is established. Ring slip, etc. will affect the positioning accuracy of the lead, resulting in less than 90% of the success rate of lead positioning
Therefore, the control effect of the indentation length of the lead is unstable (the range of the lead mark is controlled within the range of 15 to 40 meters), and sometimes even batch strip indentation defects appear
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[0033] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0034] In view of the problems existing in the existing sleeves used for the indentation control of the leading edge, which "rely heavily on the positioning accuracy of the leading edge, the control effect is unstable, and rely on special grooves", the technical solution of the present invention is mainly divided into four stages.
[0035] Facility preparation: When producing cold-rolled plates with high surface quality requirements, install a set of standard circular sleeves;
[0036] The first expansion and contraction control: establish a set of diameter automatic controller (ADC), set the value Dset as the relationship function of the thickness of the head, and carry out the first sleeve expansion and opening diameter control;
[0037] Tape threading and tape winding tracking control: After the tape head coils N turns, inp...
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Abstract
The invention discloses a control method for improving cold-rolled strip steel quality by utilizing automatic diameter control for eliminating indentation. The control method comprises the following steps: step 1, installing a set of circular sleeves on a strip steel coiling drum, and arranging a layer of rubber on the surface layer of the sleeves, thereby enabling the rubber layer to generate elastic deformation under the expansion-constriction pressure, wherein the elastic deformation amount is proportional to the pressure; step 2, initiating a sleeve diameter measure value and a diameter set value, and obtaining the thickness of strip steel; step 3, determining whether the to-be coiled strip steel thickness is smaller than the set value; step 4, measuring the variation of the sleeve diameter value; step 5, employing once inertial delay manner to filter the variation of the sleeve diameter value; step 6, according to the thickness of the to-be coiled strip steel, setting a sleeve-expanding diameter set value; step 7, calculating the diameter deviation, employing proportional-integral control to calculate the output of a hydraulic servo mechanism, outputting to a servo valve to performing close-loop control; and step 8, determining the variation of the absolute value of the diameter deviation.
Description
technical field [0001] The invention relates to a control method suitable for a coiling process unit for coiling cold-rolled steel coils, more specifically, a control method for eliminating indentations by using automatic diameter control to improve the quality of cold-rolled steel strips. Background technique [0002] In the past, when the coiler of the cold rolling production line coiled the strip, it would produce crease marks on the reel. In order to reduce the crease marks on the sleeve produced by the shaft of the coiler, two methods were used. [0003] One: Like other domestic similar units, a rubber sleeve is often put on the mandrel to alleviate the impact of the sleeve sector on the strip surface. The existing technology has a significant suppression and elimination effect on the creases produced on the surface of the sleeve-type strip steel, but when this type of sleeve is actually used, it will produce a new band head pressure on the thicker (≥1.2mm) strip surfac...
Claims
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IPC IPC(8): B21C47/02
Inventor 肖至勇张洪利叶冬柏
Owner BAOSTEEL STAINLESS STEEL