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CN-118847720-B - Control method and system of Carlo coil coiling machine of acid continuous rolling unit

CN118847720BCN 118847720 BCN118847720 BCN 118847720BCN-118847720-B

Abstract

The invention provides a control method and a control system of a Carlo coiling machine of an acid tandem rolling machine set, comprising the following steps of 1, collecting control signals of the acid tandem rolling machine set, judging a moment point of tension setting switching through the collected control signals, 2, obtaining incoming material information of the acid tandem rolling machine set, judging initial tension rationality of a belt head entering a mandrel in combination with a given value of coiling tension of the coiling machine, 3, judging moment of state switching, 4, carrying out coiling control in the process of the belt head entering the mandrel to outer ring coiling, and 5, gradually lifting overshoot speed of the coiling machine based on load feedback and coiling length of an actual coiling machine, so that coiling tension is built, and stable control is realized. According to the invention, the load condition of the cold continuous rolling unit Karussell coiling machine is judged, and the moment current setting and the speed setting of the coiling machine are controlled, so that the condition of tension overshoot is avoided, the slipping of strip steel and a mandrel is reduced, the coiling stability of the unit is improved, the service life of the mandrel is prolonged, and the scratch of the strip steel is reduced.

Inventors

  • GU SHENGCHAO
  • ZHANG JINYE

Assignees

  • 上海宝信软件股份有限公司

Dates

Publication Date
20260508
Application Date
20240703

Claims (8)

  1. 1. The control method of the karsoer coiling machine of the acid tandem rolling unit is characterized by comprising the following steps: Step 1, collecting control signals of an acid tandem mill unit, and judging the moment point of tension setting switching through the collected control signals, wherein the control signals comprise a Karussell coiling machine coiling current feedback and speed feedback, a rolling mill outlet acceleration condition, a coil-assisting coiling completion signal and a coiling machine tension building completion signal; Step 2, obtaining feeding information of an acid tandem rolling mill unit, and calculating initial tension of a belt head entering a mandrel by combining a given value of coiling tension of a coiling machine; step 3, judging the moment of state switching according to the tension building completion signal, the rolling mill outlet shearing signal and the auxiliary winding completion signal and simultaneously combining the completion condition of the whole winding process; Step 4, coiling control is carried out in the process of winding the tape head from the core shaft to the outer ring; Step 5, gradually increasing the overshoot speed of the coiling machine based on the load feedback and the coiling length of the actual coiling machine so as to establish the coiling tension and realize stable control, wherein when the belt head enters the mandrel, the belt steel and the mandrel are prevented from slipping by relying on the tension pressure P of the auxiliary belt, and the maximum tension is calculated as follows: Wherein: Is the static friction coefficient; the length of the mandrel is rolled into the strip steel; The width of the strip steel; Tension pressure for the auxiliary winding belt; representing the pressure of the strip steel and the mandrel.
  2. 2. The method of controlling a continuous acid rolling mill train karlsel coiler according to claim 1, characterized in that said step 2 comprises: setting the coiling shear speed to 240mpm, and setting the speed of a coiling machine to 240+8mpm, wherein the speed of a mandrel is 32mpm/sec when the strip steel enters a half circle of the coiling machine and the strip steel is the same as the speed of the strip steel; step2.2, the mandrel moment of inertia of the coiling machine is , The quality is indicated by the fact that, Representing the vertical distance between the particle and the axis of rotation; step 2.3: the deceleration moment required by the mandrel to decelerate to the speed of the strip steel is as follows: Wherein: Representing moment of inertia; represents angular velocity; Is the reduction ratio of the coiling machine; Is the deceleration rate; and 2.4, calculating the overshoot percentage as follows: When the belt head is coiled, the m value is controlled to be 90% -120%, and at the moment, the influence on the coiling thickness difference and the slipping is minimum, so that the initial tension is obtained ) Is set at a set value of (a).
  3. 3. The method for controlling a continuous acid rolling mill train karlsel coiling machine according to claim 2, wherein the coiling process in the step 3 is as follows: Step 3.1, adopting the control mode of step 2 when the belt head enters 0-1.5 circles of the mandrel; step 3.2, gradually transiting to a preset normal tension set value to control the belt head in the process of entering the mandrel for 1.5-3 circles; and 3.3, judging the coiling completion according to the thickness of the strip steel, wherein the coiling number of the thin material is 5, and the coiling number of the thick material is 3-3.5.
  4. 4. The method of claim 1, wherein the tension setting is a step-up from low to high during the winding process between the strip head entering the mandrel and the outer ring winding, and the maximum tension is: Wherein: the mandrel is tightly hooped by the outer band steel to generate pressure.
  5. 5. A control system for a karsoer coiler of an acid tandem mill train, comprising: The control signal comprises a Karussell coiling machine coiling current feedback and speed feedback, a rolling mill outlet acceleration condition, a coil-assisting coiling completion signal and a coiling machine tension building completion signal; the module M2 is used for acquiring feeding information of the acid tandem rolling mill unit and calculating initial tension of the belt head entering the mandrel by combining a given value of coiling tension of the coiling machine; a module M3 for judging the state switching moment according to the tension building completion signal, the rolling mill outlet shearing signal and the auxiliary winding completion signal and combining the completion condition of the whole winding process; A module M4 for carrying out coiling control in the process of leading the belt head into the mandrel and coiling the outer ring; The module M5 is used for gradually increasing the overshoot speed of the coiling machine based on the load feedback and the coiling length of the actual coiling machine, thereby establishing the coiling tension and realizing stable control; When the belt head enters the mandrel, the tension pressure P of the auxiliary winding belt is relied between the belt steel and the mandrel, so that the belt steel and the mandrel are prevented from slipping, and the maximum tension is calculated as follows: Wherein: Is the static friction coefficient; the length of the mandrel is rolled into the strip steel; The width of the strip steel; Tension pressure for the auxiliary winding belt; representing the pressure of the strip steel and the mandrel.
  6. 6. The control system of a carrousel coiler of an acid tandem mill train according to claim 5, characterized in that the module M2 comprises: the module M2.1 is that the coiling shear speed is set to 240mpm, the speed of a coiling machine is 240+8mpm, and the speed of a mandrel is 32mpm/sec when the strip steel enters a half circle of the coiling machine and the strip steel is the same as the speed of the strip steel; Module M2.2 mandrel moment of inertia of the coiler is , The quality is indicated by the fact that, Representing the vertical distance between the particle and the axis of rotation; The module M2.3 is that the deceleration moment required by the mandrel to decelerate to the speed of the strip steel is as follows: Wherein: Representing moment of inertia; represents angular velocity; Is the reduction ratio of the coiling machine; Is the deceleration rate; The module M2.4 is calculated as follows: When the belt head is coiled, the m value is controlled to be 90% -120%, and at the moment, the influence on the coiling thickness difference and the slipping is minimum, so that the initial tension is obtained ) Is set at a set value of (a).
  7. 7. The control system of a carrousel coiler of an acid tandem mill train according to claim 6, characterized in that the coiling process in the module M3 is: the module M3.1 adopts a control mode of the module M2 in the process that the belt head enters the mandrel for 0-1.5 circles; the module M3.2 is controlled by gradually transiting to a preset normal tension set value in the process that the belt head enters the mandrel for 1.5-3 circles; and the module M3.3 is used for judging the coiling completion according to the thickness of the strip steel, wherein the coiling number of turns of the thin material is 5, and the thickness of the thick material is 3-3.5.
  8. 8. The control system of a continuous acid rolling mill unit karl recoiling machine according to claim 5, wherein the tension setting is a step-wise lifting from low to high during the process of winding the strip head into the mandrel to wind the outer ring, and the maximum tension is after winding the outer ring: Wherein: the mandrel is tightly hooped by the outer band steel to generate pressure.

Description

Control method and system of Carlo coil coiling machine of acid continuous rolling unit Technical Field The invention relates to the technical field of production of cold rolling plants, in particular to a control method and a control system of a Carlo siren coiling machine of an acid tandem rolling unit. Background In the production of an acid continuous rolling unit, a coiling machine is an important device in unit equipment. The coiling machine is usually arranged at the tail part of the machine unit, and as the name implies, the coiling machine is equipment for recoiling straight strip steel into finished steel coils and consists of a coiling mandrel, a coiling assisting belt, an outer supporting arm and other main equipment. In the coiling process, the coiling tension can directly influence the shape, thickness difference, coiling quality and the like of the finished strip steel. Under abnormal conditions, the thickness difference fluctuation is large, the belt head is slipped and broken, the belt head cannot be normally coiled, the inner ring is unwound, so that coil unloading cannot be realized, the inner ring core pulling phenomenon occurs in the coil unloading process, the coil collapse phenomenon occurs after the coil is hoisted into a warehouse, the coil slipping phenomenon occurs in the uncoiling process of a downstream unit, the multilayer surface of the inner ring is contused, the surface roughness of a coiling mandrel is rapidly reduced, the belt is damaged and the like. When in software control, the coiling machine generally adopts a constant tension control mode, and the setting of the coiling speed is always higher than the actual speed feedback of the strip steel, so that the coiling machine rapidly coils the strip head and reaches the set tension, namely the set torque current value. When the head of the strip steel enters the wrapper belt, the mandrel generates traction force on the strip steel, and the mandrel reduces the mandrel axial speed to be synchronous with the strip steel under the external acting force of the strip steel. Because the mandrel is large mechanical equipment, the integral inertia is relatively large, and the braking moment generated by speed reduction is relatively large, so that the actual tension fluctuation of the strip steel is greatly influenced. The two conditions are that when the strip steel coiling tension is relatively high, the strip steel and the mandrel generate relative sliding friction, and when the strip steel coiling tension is relatively low, the mandrel and the strip steel inner ring generate serious abrasion, and when the strip steel coiling tension is relatively low, the strip steel and the mandrel do not generate sliding friction. The momentary rise in winding tension has a relatively great influence on the winding stability, irrespective of the two conditions, which occurs at the moment the tape head bites into the coiler, and which is almost impossible for the operator to intervene in the operation. Patent document CN110193532a discloses a method for rapidly judging and controlling tension fluctuation of a coiler, which comprises detecting control precision of coiler torque, controlling thickness precision of an outlet, reducing deviation of actual value and set value of coiling tension, reducing deviation of actual value and set value of coiling speed, and controlling output of coiler transmission system torque. However, the present patent cannot completely solve the existing technical problems, and cannot meet the needs of the present invention. Disclosure of Invention Aiming at the defects in the prior art, the invention aims to provide a control method and a control system of a Carlo coil coiling machine of an acid tandem rolling mill set. The control method of the Carlo coil coiling machine of the acid continuous rolling unit provided by the invention comprises the following steps: Step 1, collecting control signals of an acid tandem mill unit, and judging the moment point of tension setting switching through the collected control signals, wherein the control signals comprise a Karussell coiling machine coiling current feedback and speed feedback, a rolling mill outlet acceleration condition, a coil-assisting coiling completion signal and a coiling machine tension building completion signal; Step 2, obtaining feeding information of an acid tandem rolling mill unit, and calculating initial tension of a belt head entering a mandrel by combining a given value of coiling tension of a coiling machine; step 3, judging the moment of state switching according to the tension building completion signal, the rolling mill outlet shearing signal and the auxiliary winding completion signal and simultaneously combining the completion condition of the whole winding process; Step 4, coiling control is carried out in the process of winding the tape head from the core shaft to the outer ring; And 5, gradually increasing the overshoot speed of the coiling