阅读说明：本技术 一种板卷箱定尾角度调节方法 (Method for adjusting tail-fixing angle of coil box ) 是由 刘志卫 李中华 李杨 吕耀强 高燕 马永乐 于 2020-06-06 设计创作，主要内容包括：本发明涉及一种板卷箱定尾角度调节方法,属于热轧技术领域。本发明的技术方案是：红外摄像机检测钢卷侧边正向形貌,系统识别钢卷形貌,当<Image he="24" wi="79" file="673596DEST_PATH_IMAGE002.GIF" imgContent="drawing" imgFormat="GIF" orientation="portrait" inline="no"></Image>时,1#摇篮辊带动钢卷负向转动一定弧长；1#摇篮辊调整完整后,红外摄像机重新检测钢卷侧边正向形貌,通过图形拟合再次计算调整后定尾角度值<Image he="27" wi="34" file="72960DEST_PATH_IMAGE004.GIF" imgContent="drawing" imgFormat="GIF" orientation="portrait" inline="no"></Image>,确保钢卷调整后的定尾角度<Image he="29" wi="144" file="446172DEST_PATH_IMAGE006.GIF" imgContent="drawing" imgFormat="GIF" orientation="portrait" inline="no"></Image>范围内,保证钢卷能够正常开卷。本发明的有益效果是：通过对板卷箱钢卷定尾角度进行自动修正,可以有效的避免定尾角度过高或者过低带来的开卷风险,确保板卷箱钢卷开卷时序顺利进行,有效提升了板卷箱运行的稳定性,实现了产线自动化水平和生产效率的提升。(The invention relates to a method for adjusting the tail-fixing angle of a coil box, and belongs to the technical field of hot rolling. The technical scheme of the invention is as follows: detecting the positive appearance of the side edge of the steel coil by an infrared camera, and identifying the appearance of the steel coil by a system When the steel coil is rotated in the negative direction, the No. 1 cradle roller drives the steel coil to rotate for a certain arc length; after the No. 1 cradle roll is completely adjusted, the infrared camera redetects the forward morphology of the side edge of the steel coil, and the adjusted final angle value is calculated again through pattern fitting Ensuring the tail-positioning angle of the steel coil after adjustment Within the range, the steel coil can be ensured to be normally uncoiled. The invention has the beneficial effects that: through deciding the tail angle to coil of strip case coil of strip and carrying out automatic correction, can effectually avoid deciding that the tail angle is too high or cross the risk of opening a book of bringing excessively, ensure that coil of strip case coil of strip is opened a book the chronogenesis and is gone on smoothly, effectively promoted coil of strip case operation's stability, realized the promotion of production line automation level and production efficiency.)

1. A tail-positioning angle adjusting method for a coil box is characterized by comprising the following steps:

step 1, ending the tail timing sequence of the coil box, and pausing the uncoiling timing sequence of the coil box;

step 2, detecting the side positive morphology of the steel coil by an infrared camera, identifying the steel coil morphology by a system, and calculating the actual definite tail angle value theta through pattern fitting_{Practice of}；

Step 3, the system calculates whether theta satisfies [ -15 degrees, +15 degrees °]Where θ ═ θ_{Practice of}-θ_Target. When the theta value meets the requirement, the coil box executes an uncoiling time sequence;

step 4, if the value theta does not meet the requirement, when the angle theta is more than +15 degrees, the 1# cradle roller drives the steel coil to rotate in the positive direction; when theta is less than-15 degrees, the 1# cradle roller drives the steel coil to rotate in the negative direction;

step 5, detecting the side forward morphology of the steel coil again by the infrared camera, recognizing the morphology of the steel coil by the system, and calculating the adjusted tail angle value theta through pattern fitting_{Adjustment of}；

Step 6, the system calculates whether the adjusted theta value satisfies [ -15 degrees, +15 degrees ] or not again]When theta is required to be equal to theta_{Adjustment of}-θ_Target(ii) a When theta does not meet the requirement, carrying out corresponding adjustment again;

and 7, finally, when the theta meets the requirements of [ -15 degrees, +15 degrees ], the coil box executes an uncoiling sequence.

2. The method for adjusting the tail-defining angle of a coil box according to claim 1, wherein: the infrared camera is arranged on the transmission side of the coil box and used for detecting the shape of the forward side edge of the steel coil.

3. The method for adjusting the tail-defining angle of a coil box according to claim 1, wherein: theta is described_{Practice of}The angle of the circle center corresponding to the top end of the cross center line of the steel coil to the top end of the tail part of the steel coil.

4. The method for adjusting the tail-defining angle of a coil box according to claim 1, wherein: the target tail-fixing angle value theta_Target＝135°。

5. The method for adjusting the tail end angle of the coil box according to claim 1, wherein the method comprises the following steps: the speed of the No. 1 cradle roller is not less than +0.5m/s when the roller rotates positively, and not less than-0.5 m/s when the roller rotates negatively.

6. The method for adjusting the tail-defining angle of a coil box according to claim 1, wherein: the central angle corresponding to the positive or negative rotation of a certain arc length is theta, and the value theta is | theta_{Practice of}-θ_Target|。

7. The method for adjusting the tail-defining angle of a coil box according to claim 6, wherein: the angle theta can be calculated by the formula l-theta pi d/360, and the arc length value l required to rotate is calculated.

8. The method for adjusting the tail-defining angle of a coil box according to claim 7, wherein: and d is a calculated value of the outer diameter of the coiled steel coil and is obtained from the second level.

Technical Field

The invention relates to a method for adjusting the tail-fixing angle of a coil box, and belongs to the technical field of hot rolling.

Background

Coil boxes are a common piece of equipment in hot continuous rolling plants. The intermediate blank is fed into a finishing mill through the processes of coiling and uncoiling by a coil box, and the coil box has good effects on reducing the transverse temperature difference between the head and the tail of the intermediate blank, removing the surface oxide scale and the like. The method comprises the steps that firstly, an intermediate blank needs to undergo coiling and uncoiling processes in the process of passing through a coil box, tail fixing is the last link of a coiling time sequence of the coil box, tail length is calculated through tracking, tail fixing control is achieved through the accumulated integral of roller speed, and the tail of a steel coil needs to be stopped within a certain height range after tail fixing so as to guarantee smooth proceeding of a subsequent uncoiling time sequence. However, due to the influence of the material tracking precision of the intermediate blank and the function precision of equipment, the tail fixing accuracy and consistency of the coiled sheet box have various uncertainties in a field environment, and when the tail fixing is higher, the head of the intermediate blank is warped after uncoiling; when the fixed tail is lower, the head of the intermediate billet can be knocked after uncoiling, the two problems can cause the head of the intermediate billet to scratch and rub with a roller way or other equipment in the uncoiling process to cause uncoiling failure, and scrap steel can be caused in serious cases.

When the tail fixing is abnormal in the production process, the tail fixing angle can be adjusted through a tail fixing compensation value, and the principle is that the final tail fixing angle is adjusted by correcting the length change of the tail tracking distance. However, the regulation has some limit problems, such as the lag of the regulation and the timeliness and accuracy of the observation of the abnormal problems in the field. Therefore, how to realize the automatic regulation and control of abnormal tail fixing is significant for improving the labor efficiency and the production stability.

Disclosure of Invention

The invention aims to provide a method for adjusting the tail-fixing angle of a coil box_{Practice of}Then with theta_TargetComparing the values to determine theta_{Practice of}-θ_TargetWhether or not the value satisfies [ -15 °, +15 ° ]]When the requirement is met, when the requirement is exceeded, the coil of strip case 1# cradle roller carries out corresponding rotation and adjusts the fixed tail, realize the coil of strip case and decide the automatic control of tail closed loop, decide the tail angle to coil of strip case coil of strip and carry out automatic correction, can effectually avoid deciding that the tail angle is too high or cross the risk of opening a book of bringing excessively, ensure that the coil of strip case is opened a book the coil of strip chronogenesis and is gone on smoothly, the stability of coil of strip case operation has effectively been promoted, the promotion of production line automation level and production efficiency has been realized, the above-mentioned problem that exists among the background art has been solved effectively.

The technical scheme of the invention is as follows: a tail-positioning angle adjusting method for a coil box comprises the following steps:

step 1, ending the tail timing sequence of the coil box, and pausing the uncoiling timing sequence of the coil box;

step 2, detecting the side positive morphology of the steel coil by an infrared camera, identifying the steel coil morphology by a system, and calculating the actual definite tail angle value theta through pattern fitting_{Practice of}；

Step 3, the system calculates whether theta satisfies [ -15 degrees, +15 degrees °]Where θ ═ θ_{Practice of}-θ_Target. When the theta value meets the requirement, the coil box executes an uncoiling time sequence;

step 4, if the value of theta does not meet the requirement, when the angle theta is more than +15 degrees, the 1# cradle roller drives the steel coil to rotate forward for a certain arc length; when theta is less than-15 degrees, the 1# cradle roller drives the steel coil to rotate in the negative direction for a certain arc length;

step 5, detecting the side forward morphology of the steel coil again by the infrared camera, recognizing the morphology of the steel coil by the system, and calculating the adjusted tail angle value theta through pattern fitting_{Adjustment of}；

Step 6, the system calculates again whether the adjusted theta value satisfies [ -15 °,+15°]when theta is required to be equal to theta_{Adjustment of}-θ_Target(ii) a When theta does not meet the requirement, carrying out corresponding adjustment again;

and 7, finally, when the theta meets the requirements of [ -15 degrees, +15 degrees ], the coil box executes an uncoiling sequence.

The infrared camera is arranged on the transmission side of the coil box and used for detecting the shape of the forward side edge of the steel coil.

Theta is described_{Practice of}The angle of the circle center corresponding to the top end of the cross center line of the steel coil to the top end of the tail part of the steel coil.

The target tail-fixing angle value theta_Target＝135°。

The 1# cradle roller has a speed upsilon of +0.5m/s when rotating in the positive direction and has a speed upsilon of-0.5 m/s when rotating in the negative direction

The central angle corresponding to the positive or negative rotation of a certain arc length is theta, and the value theta is | theta_{Practice of}-θ_Target|。

The angle theta can be calculated by the formula l-theta pi d/360, and the arc length value l required to rotate is calculated.

And d is a calculated value of the outer diameter of the coiled steel coil and is obtained from the second level.

The invention has the beneficial effects that: detecting the forward morphology of the side edge of the steel coil at the end of the tail by using an infrared camera, and calculating the actual tail-fixing angle value theta by means of graph fitting_{Practice of}Then with theta_TargetComparing the values to determine theta_{Practice of}-θ_TargetWhether or not the value satisfies [ -15 °, +15 ° ]]When the requirement is met, when the requirement is exceeded, the cradle roller of the coil box No. 1 is correspondingly rotated to adjust the fixed tail, the automatic control of the closed loop of the fixed tail of the coil box is realized, the tail angle of the coil box steel is automatically corrected, the uncoiling risk caused by overhigh or overlow tail angle can be effectively avoided, the coil box uncoiling time sequence is ensured to be smoothly carried out, the stability of the operation of the coil box is effectively improved, and the improvement of the production line automation level and the production efficiency is realized.

Drawings

FIG. 1 is a schematic view of a roll of the present invention;

FIG. 2 is a flow chart of a control method of the present invention;

in the figure: CR1 is a No. 1 cradle roll, BR is a bending roll, FR is a forming roll, theta_TargetAnd the final target angle value is obtained.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the embodiments of the present invention with reference to the drawings of the embodiments, and it is obvious that the described embodiments are a small part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work based on the embodiments of the present invention belong to the protection scope of the present invention.

A tail-positioning angle adjusting method for a coil box comprises the following steps:

step 1, ending the tail timing sequence of the coil box, and pausing the uncoiling timing sequence of the coil box;

step 2, detecting the side positive morphology of the steel coil by an infrared camera, identifying the steel coil morphology by a system, and calculating the actual definite tail angle value theta through pattern fitting_{Practice of}；

Step 3, the system calculates whether theta satisfies [ -15 degrees, +15 degrees °]Where θ ═ θ_{Practice of}-θ_Target. When the theta value meets the requirement, the coil box executes an uncoiling time sequence;

step 4, if the value of theta does not meet the requirement, when the angle theta is more than +15 degrees, the 1# cradle roller drives the steel coil to rotate forward for a certain arc length; when theta is less than-15 degrees, the 1# cradle roller drives the steel coil to rotate in the negative direction for a certain arc length;

step 5, detecting the side forward morphology of the steel coil again by the infrared camera, recognizing the morphology of the steel coil by the system, and calculating the adjusted tail angle value theta through pattern fitting_{Adjustment of}；

Step 6, the system calculates whether the adjusted theta value satisfies [ -15 degrees, +15 degrees ] or not again]When theta is required to be equal to theta_{Adjustment of}-θ_Target(ii) a When theta does not meet the requirement, carrying out corresponding adjustment again;

and 7, finally, when the theta meets the requirements of [ -15 degrees, +15 degrees ], the coil box executes an uncoiling sequence.

The infrared camera is arranged on the transmission side of the coil box and used for detecting the shape of the forward side edge of the steel coil.

Theta is described_{Practice of}The angle of the circle center corresponding to the top end of the cross center line of the steel coil to the top end of the tail part of the steel coil.

The target tail-fixing angle value theta_Target＝135°。

The 1# cradle roller has a speed upsilon of +0.5m/s when rotating in the positive direction and has a speed upsilon of-0.5 m/s when rotating in the negative direction

The central angle corresponding to the positive or negative rotation of a certain arc length is theta, and the value theta is | theta_{Practice of}-θ_Target|。

The angle theta can be calculated by the formula l-theta pi d/360, and the arc length value l required to rotate is calculated.

And d is a calculated value of the outer diameter of the coiled steel coil and is obtained from the second level.

In order to more clearly understand the content of the invention, the process of coiling the lower coil box is described, firstly, after the head of the intermediate blank enters the bending roller of the coil box, the head of the blank is extruded by the three rollers to generate bending deformation, the bent head and the cambered guard plate of the forming roller generate impact to complete the forming of the innermost ring, then the intermediate blank is driven by the cradle roller 1# and the bending roller to complete the subsequent coiling process, and the tail of the coil box is determined by tracking the tail of the intermediate blank so as to determine the length of the intermediate blank, and then the tail position is determined according to the corresponding speed. Wherein CR1 is No. 1 cradle roll, BR is bending roll, FR is forming roll, theta_TargetAnd the final target angle value is obtained.