A method for automatically shifting the roll of a hot rolling coiler

Abstract

The present invention discloses a method for automatically shifting the roll of a hot rolling coiler. A strip steel detection device is added at the position of the finishing rolling entrance guide plate to check the head position information of the strip steel. When the strip steel is in the process of running from the flying shear to each finishing rolling frame, the process machine sends the thickness information of the strip steel to the coiling L1 computer for multiple times. When the thickness of the strip steel is greater than the set thickness value, the coiling L1 computer automatically starts the automatic shifting process of the roll. The present invention achieves the purpose of reducing the load of operators, reducing operating errors and accidents caused thereby.

Description

Technical Field

[0001] The invention relates to hot rolling coiling technology, and more specifically to an automatic gear shifting method for a coiler of a hot rolling coiler. Background Art

[0002] The coiler is an important equipment in the hot rolling production line, which is used to roll the hot rolled strip into steel coils. The coiler is located after the finishing mill and is the last process of the hot rolling production line. Figure 1 As shown, the coiler mainly includes roller table 1, side guide plate 2, pinch roller 3, reel 4, three auxiliary coiling rollers 5, hydraulic cylinder 6 of auxiliary coiling roller, etc. The roller table 1 is mainly responsible for conveying the strip from the finishing mill to the coiler unit; the side guide plate 2 is mainly used to center the strip; the pinch roller 3 is mainly used to apply a certain clamping force to the strip in the head biting stage, and at the same time implement the first bending deformation on it, and apply a stable tension to the strip in the tail coiling stage to ensure good coil quality; the auxiliary coiling roller 5 is mainly used to help bend the strip and make the strip tightly wound on the reel 4; the reel 4 is mainly used to apply tension to the strip after it is wound to ensure the coil quality is qualified.

[0003] The thickness of hot rolled strip steel generally ranges from 1.2mm to 25.4mm. When the coiler produces thin strip steel, the reel 4 needs to provide high speed and low torque. When producing thick strip steel, the reel 4 needs to provide low speed and high torque. However, the torque provided by the motor of the coiler is limited, so the reel 4 needs to be shifted when switching between thin strip steel and thick strip steel.

[0004] Combination Figure 2 As shown, the motor 8 inputs torque to the gearbox 7 through the input shaft 71, and the input shaft 71 is provided with an input shaft low-speed gear 72 and an input shaft high-speed gear 73, the input shaft low-speed gear 72 is meshed with the output shaft low-speed gear 76, and the input shaft high-speed gear 73 is meshed with the output shaft high-speed gear 75. When the clutch 77 is meshed with the input shaft low-speed gear 72 and the output shaft low-speed gear 76, the output shaft 74 outputs low-speed high-torque to the reel 4; when the clutch 77 is meshed with the input shaft high-speed gear 73 and the output shaft high-speed gear 75, the output shaft 74 outputs high-speed low-torque to the reel 4.

[0005] Combination Figure 3 As shown, the existing coiler has manual gear shifting, and the steps are as follows: the operator manually reviews the rolling schedule and determines whether and when to shift gears according to the thickness of the strip to be rolled. When the thickness that needs to be shifted is reached, the operation of the coiler is manually stopped in advance, and the low or high speed gear is manually input. If the gear shift is successful, the coiler is manually operated and the gear shift is completed; if the gear shift is unsuccessful, the coiler needs to be rotated inching until the gear shift is successful.

[0006] The existing coiler's reel adopts manual shifting, which has the following main disadvantages:

[0007] 1) Operators need to carefully review the schedule and manually select the timing of gear shifting. Manual gear shifting increases the operating load.

[0008] 2) Since shifting is a very important step, if the wrong gear is used, it may cause an accident. It is difficult to avoid mistakes and omissions in manual shifting, and it is also difficult to prevent accidents. Summary of the invention

[0009] In view of the above-mentioned defects existing in the prior art, the object of the present invention is to provide a method for automatically shifting the reel of a hot rolling coiler, so as to reduce the load on operators, reduce operating errors and accidents caused thereby.

[0010] To achieve the above object, the present invention adopts the following technical solution:

[0011] A method for automatically shifting the reel of a hot rolling coiler:

[0012] A strip steel detection device is arranged at the position of the finishing rolling entrance guide plate, and the strip steel detection device is used to check the head position information of the strip steel;

[0013] During the operation of the strip from the flying shear to each finishing rolling stand, the process machine sends the thickness information of the strip to the coiling L1 computer multiple times;

[0014] When the thickness of the strip is greater than the set thickness value, the coiling L1 computer starts the automatic gear shifting process of the coiling drum.

[0015] Preferably, the reel automatic shifting method further comprises the following steps:

[0016] 1) When the strip detection device detects the head position of the strip, the coiling L1 computer sends a signal to the process machine indicating that the head position of the strip has reached the position before the flying shear;

[0017] 2) The process machine sends the thickness information of the strip to the coiling L1 computer for the first time;

[0018] 3) When the head of the strip is sequentially bitten into each of the finishing stands, the coiling L1 computer sends a signal to the process machine indicating that the head of the strip has reached each of the finishing stands, and the process machine sends the thickness information of the strip to the coiling L1 computer sequentially;

[0019] 4) When the thickness of the strip is greater than the set thickness value, the coiling L1 computer automatically starts the automatic gear shifting process of the coiling drum;

[0020] 5) Determine whether there is strip steel on the reel. If yes, wait until the reel is finished winding and unloaded, and then the reel automatically shifts gears; if no, proceed to step 7);

[0021] 6) The reel automatically stops and starts shifting, and then determines whether the automatic shifting is successful.

[0022] Preferably, during the operation of the strip from the flying shear to the finishing rolling stands, the process machine sends the thickness information of the strip to the coiling L1 computer three times before the flying shear, at the F1 stand, and at the F2 stand.

[0023] Preferably, the step 3) further comprises:

[0024] When the head of the strip is bitten into the finishing rolling F1 stand, the coiling L1 computer sends the thickness information of the strip to the process machine for the second time;

[0025] When the head position of the strip is bitten into the finishing rolling F2 stand, the coiling L1 computer sends the thickness information of the strip to the process machine for the third time.

[0026] Preferably, in step 5), the set thickness value is 7 mm.

[0027] Preferably, in step 7), whether the automatic shifting is successful is determined as follows:

[0028] If the gear proximity switch on the transmission is turned on, it means that the automatic gear shift is successful;

[0029] If the gear proximity switch on the gearbox is not turned on, it means that the automatic gear shift is unsuccessful. After the reel automatically rotates at a speed S for a time T, the reel automatically stops and shifts gears;

[0030] It is determined again whether the gear proximity switch on the gearbox is turned on. If it is turned on, the gear shift is successful; if it is not turned on, the gear shift fails.

[0031] Preferably, the speed S of the reel is 0.5 m / s, and the rotation time T is 1 s.

[0032] Preferably, the strip steel detection device is a pyrometer.

[0033] The present invention provides a method for automatically shifting the reel of a hot rolling coiler, which has the following beneficial effects:

[0034] 1) Reduce the operating load, improve the degree of automation, and create the necessary conditions for centralized monitoring of the hot-rolled production line;

[0035] 2) Automatic shifting eliminates the mistakes and accidents caused by manual shifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of an existing coiler;

[0037] Figure 2 It is a structural schematic diagram of a gearbox on an existing coiler;

[0038] Figure 3 It is a schematic diagram of the existing manual shifting process;

[0039] Figure 4 It is a schematic flow chart of the automatic gear shifting method of the reel of the present invention;

[0040] Figure 5 It is a schematic diagram of the installation of the strip steel detection device in the automatic reel shifting method of the present invention;

[0041] Figure 6 It is a schematic diagram of a gear proximity switch on a gearbox in the automatic gear shifting method of a reel of the present invention. DETAILED DESCRIPTION

[0042] In order to better understand the above technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0043] Combination Figure 4 and Figure 5 As shown, the present invention provides a method for automatically shifting the reel of a hot rolling coiler:

[0044] A strip detection device 92 is added at the position of the finishing entrance guide plate 91 to check the head position information of the strip. The reason for selecting this position is that if the strip detection device 92 is set at the rough rolling exit, there may be two strips between rough rolling and finishing rolling, which cannot achieve accurate gear shifting. If it is arranged after the F1 frame 96, it will not provide enough time for the coiler to shift the roll. A dephosphorization box 94 and a vertical roller 95 are usually set between the flying shear 93 and the F1 frame 96, and the water and fog are relatively large, which will affect the strip head position detection of the strip detection device 92.

[0045] Since the gear shifting of the coil is very important, to ensure that everything is safe, when the strip is running from the flying shear 93 to the finishing rolling stands, the process machine sends the strip thickness information to the coiling L1 computer multiple times.

[0046] Combination Figures 4 to 6 As shown, the automatic gear shifting method of the reel of the present invention further comprises the following steps:

[0047] 1) When the strip detection device 92 detects the head position of the strip, the coiling L1 computer sends a signal to the process machine that the head position of the strip has reached the front of the flying shear 93;

[0048] 2) The process machine sends the strip thickness information to the coiling L1 computer for the first time;

[0049] 3) When the head position of the strip is sequentially bitten into the finishing rolling F1~F7 frames 96~102, the coiling L1 computer sends a signal to the process machine that the head position of the strip has reached the finishing rolling F1~F7 frames 96~102;

[0050] 4) The process machine sends multiple strip thickness information to the coiling L1 computer;

[0051] 5) When the thickness of the strip is greater than 7mm, the coiling L1 computer automatically starts the automatic reel shifting process;

[0052] 6) Determine whether there is strip steel on the reel. If yes, wait for the reel to be wound up and unloaded, and then the reel will automatically shift gears; if not, go to step 7);

[0053] 7) The reel stops automatically and starts shifting gears, and then determines whether the automatic shifting is successful, as follows:

[0054] If the corresponding gear proximity switch 771 or gear proximity switch 772 on the gearbox is turned on, it means that the automatic gear shift is successful;

[0055] If the corresponding gear proximity switch 771 or gear proximity switch 772 on the gearbox is not turned on, it means that the automatic gear shift is unsuccessful, and the reel automatically rotates at a speed S for a time T, then the reel automatically stops and shifts gears;

[0056] It is determined again whether the corresponding gear proximity switch 771 or gear proximity switch 772 on the gearbox is turned on. If it is turned on, the gear shift is successful; if it is not turned on, the gear shift fails.

[0057] Example

[0058] A strip steel detection device 92 is added at the position of the finishing rolling entrance guide plate 91. The strip steel detection device 92 uses a landinstruments pyrometer, model M1 / 600-1600C, which is used to check the head position information of the strip steel.

[0059] Since the gear shifting of the reel is very important, to ensure that everything is foolproof, the process machine needs to send the strip thickness information to the coiling L1 computer three times in front of the flying shear 93, the F1 frame 96, and the F2 frame 97.

[0060] The automatic gear shifting method of the reel in this embodiment further comprises the following steps:

[0061] 1) When the strip detection device 92 detects the head position of the strip, the coiling L1 computer sends a signal to the process machine that the head position of the strip has reached the front of the flying shear 93;

[0062] 2) The process machine sends the strip thickness information to the coiling L1 computer for the first time;

[0063] 3) When the head position of the strip is sequentially bitten into the finishing rolling F1 stand 96, the coiling L1 computer sends a signal to the process machine that the head position of the strip has reached the finishing rolling F1 stand 96;

[0064] 4) The process machine sends the strip thickness information to the coiling L1 computer for the second time;

[0065] 5) When the head position of the strip is sequentially bitten into the finishing rolling F2 stand 97, the coiling L1 computer sends a signal to the process machine that the head position of the strip has reached the finishing rolling F2 stand 97;

[0066] 6) The process machine sends the strip thickness information to the coiling L1 computer for the third time;

[0067] 7) When the thickness of the strip is greater than 7mm, the coiling L1 computer automatically starts the automatic reel shifting process;

[0068] 8) Determine whether there is strip steel on the reel. If yes, wait for the reel to be wound up and unloaded, and then the reel will automatically shift gears; if not, go to step 9);

[0069] 9) The reel stops automatically and starts shifting gears, and then determines whether the automatic shifting is successful, as follows:

[0070] If the corresponding gear proximity switch 771 or gear proximity switch 772 on the gearbox is turned on, it means that the automatic gear shift is successful;

[0071] If the corresponding gear proximity switch 771 or gear proximity switch 772 on the gearbox is not turned on, it means that the automatic gear shift is unsuccessful, and the reel automatically rotates at a speed of 0.5m / s for 1s, then the reel automatically stops and shifts gears;

[0072] 10) Determine again whether the corresponding gear proximity switch 771 or gear proximity switch 772 on the gearbox is turned on. If it is turned on, the gear shift is successful; if it is not turned on, the gear shift fails.

[0073] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A method for automatically shifting the reel of a hot rolling coiler, Features: A strip steel detection device is arranged at the position of the finishing rolling entrance guide plate, and the strip steel detection device is used to check the head position information of the strip steel; During the operation of the strip from the flying shear to each finishing rolling stand, the process machine sends the thickness information of the strip to the coiling L1 computer multiple times; When the thickness of the strip is greater than the set thickness value, the coiling L1 computer starts the automatic gear shifting process of the coiling drum. The automatic reel shifting method further comprises the following steps: 1) When the strip detection device detects the head position of the strip, the coiling L1 computer sends a signal to the process machine indicating that the head position of the strip has reached the front of the flying shear; 2) The process machine sends the thickness information of the strip to the coiling L1 computer for the first time; 3) When the head of the strip is bitten into each of the finishing stands in sequence, the coiling L1 computer sends a signal to the process machine indicating that the head of the strip has reached each of the finishing stands; the process machine sends the thickness information of the strip to the coiling L1 computer in sequence; 4) When the thickness of the strip is greater than the set thickness value, the coiling L1 computer automatically starts the automatic gear shifting process of the coiling drum; 5) Determine whether there is strip steel on the reel. If yes, wait until the reel is finished winding and unloaded, and then the reel automatically shifts gears; otherwise, proceed to step 6); 6) The reel automatically stops and starts shifting, and then determines whether the automatic shifting is successful. During the operation of the strip from the flying shear to the finishing rolling stands, the process machine sends the strip thickness information to the coiling L1 computer three times before the flying shear, the F1 stand, and the F2 stand. The step 3) further comprises: When the head position of the strip is bitten into the finishing rolling F1 stand, the coiling L1 computer sends the thickness information of the strip to the process machine for the second time; When the head of the strip is bitten into the finishing rolling F2 stand, the coiling L1 computer sends the thickness information of the strip to the process machine for the third time. In step 6), whether the automatic shifting is successful is determined as follows: If the gear proximity switch on the transmission is turned on, it means that the automatic gear shift is successful; If the gear proximity switch on the gearbox is not turned on, it means that the automatic gear shift is unsuccessful. After the reel automatically rotates at a speed S for a time T, the reel automatically stops and shifts gears; It is determined again whether the gear proximity switch on the gearbox is turned on. If it is turned on, the gear shift is successful; if it is not turned on, the gear shift fails.

2. The method for automatically shifting the reel of a hot rolling coiler according to claim 1, Features: In the step 4), the set thickness value is 7 mm.

3. The method for automatically shifting the reel of a hot rolling coiler according to claim 1, Features: The speed S of the reel is 0.5 m / s, and the rotation time T is 1 s.

4. The method for automatically shifting the reel of a hot rolling coiler according to claim 1, Features: The strip steel detection device is a pyrometer.

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