On-line temper mill non-open roll or slightly open roll overweld process method

Abstract

The invention provides an on-line temper mill non-open roller or micro-open roller over-welding process method which comprises the following steps: S1, starting an on-line temper mill automatic over-welding procedure, and selecting non-open roller or micro-open roller according to the condition of a welding machine; s2, the speed of the online temper mill is reduced, and the rolling force of a lower roller of the temper mill is reduced to the minimum rolling force; and S3, the temper mill is accelerated and operates normally. According to the application, by modifying the over-welding mode of the temper mill, the over-welding time of the cold line temper mill is reduced from 1 minute and 30 seconds to 45 seconds during thin material production, the over-welding time is saved by about 40 seconds, and the loop length of an outlet is about 20% after over-welding.

Description

Technical Field

[0001] The invention belongs to the technical field of stainless steel production, and in particular relates to a process method for an online flattening machine to pass a weld without opening a roll or with slightly opening a roll. Background Art

[0002] Since the online flattening machine takes a long time to pass the weld seam, the middle speed is fast when producing thin plates, resulting in too much looper at the export and insufficient time for unloading the coil at the export. The middle speed needs to be reduced to unload the coil normally. Summary of the invention

[0003] In view of this, the present invention aims to propose a process method for passing the weld seam of an online flattening machine without opening the roller or with slightly opening the roller, so as to solve at least one technical problem in the background technology.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] The process of passing the weld seam with an online flattening machine without opening the roller or with slightly opening the roller comprises the following steps:

[0006] S1: Start the automatic welding seam passing program of the online leveling machine, and select the non-opening roller or slightly opening roller according to the situation of the welding machine;

[0007] S2: The online skin pass mill reduces its speed to reduce the rolling force of the lower roll of the skin pass mill to the minimum rolling force;

[0008] S3: The leveling machine speeds up and operates normally.

[0009] Furthermore, step S1 also includes balancing the inlet and outlet tensions of the online leveling machine, and the tensions are both 20-45 MPa.

[0010] Furthermore, in step S1, if the welding machine uses laser welding or lap welding, and the interface is flat, then it is selected not to open the roller, otherwise it is selected to use a slightly open roller.

[0011] Further, if a slightly open roller is selected in step S1, step S1 also includes opening the polisher;

[0012] Step S3 also includes opening the lower working roll of the online leveling machine to a specified position. The leveling machine closing position can be set on the HMI. When the set position is reached, the lower working roll of the leveling machine is closed, and after the roll gap closing line number is triggered, the tension balance of the leveling machine entrance and exit is canceled and the polisher is closed.

[0013] Furthermore, when the roll is slightly opened in step S3, the lower working roll of the online leveling machine is opened to a position of 4.5-5.5 mm.

[0014] Furthermore, in step S1, it is selected not to open the rollers, and step S3 also includes setting the closing position of the leveling machine on the HMI, restoring the stopping force of the leveling machine when the set position is reached, and canceling the tension balance at the inlet and outlet of the leveling machine after the roller gap closing line number is triggered.

[0015] Furthermore, step S2 also includes selecting the mode of online leveling as human-machine selection.

[0016] Furthermore, in step S2, the reduced speed of the online leveling machine is 19-21 m / min.

[0017] Compared with the prior art, the process method of the online flattening machine without opening the roller or slightly opening the roller to pass the weld seam has the following advantages:

[0018] This application reduces the time of the cold wire leveler to pass the weld seam from 1 minute and 30 seconds to 45 seconds when producing thin materials by modifying the leveler passing the weld seam mode, saving about 40 seconds of the time of passing the weld seam, and the exit looper amount after passing the weld seam is about 20%. When the running speed of the middle part of the cold wire is guaranteed to be 150m / min, when the tail of the cold wire is unloaded, the exit looper amount is too large, and the middle part of the cold wire needs to be slowed down to unload the coil normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a diagram showing the effect of the online leveling machine with a micro-open roller passing over the weld seam as described in Example 1 of the present invention. DETAILED DESCRIPTION

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0023] Example 1

[0024] Online flattening machine with slightly open rollers passing through weld seams

[0025] The online leveling machine adopts the existing technology. The model of the online leveling machine is: CAPL Inline 2-high SPM

[0026] 1. Balance the tension at the inlet and outlet of the online leveling machine and turn on the polisher: When the automatic welding seam passing program of the online leveling machine is started, balance the tension at the inlet and outlet of the online leveling machine and turn on the polisher

[0027] 2. The online leveling machine slows down to the set speed: The speed of the leveling machine passing the weld can be set on the HMI, and the position where it slows down to the set speed can be set on the HMI. At 20m / min, it is 1.8m in front of the leveling machine. When the online leveling machine automatically passes the weld, it will automatically slow down according to the current speed, the set speed and the set position.

[0028] 3. The lower working roller of the online leveling machine is opened to the 5mm position: When the weld is leveled online and reaches the weld speed, the online leveling machine opens the lower working roller.

[0029] 4. Close the lower working roll of the online leveler: close the lower working roll and restore the braking force position 1.5m behind the leveler; the leveler closing position can be set on the HMI, and the lower working roll of the leveler is closed when it reaches the set position, and the tension balance of the leveler entrance and exit is cancelled after the roll gap closing line number is triggered.

[0030] 5. Turn off the polisher and increase the speed to normal operating speed.

[0031] When the leveling machine is put into use for the first time, the embodiment 1 should be selected. After it is put into use, the specific working mode of the leveling machine can be selected according to the production situation. When the next roll is not put into use, the working mode of the leveling machine will automatically select the operating mode of the embodiment 1. And the working mode of the leveling machine cannot be switched during the automatic welding time of the leveling machine. The effect is as follows Figure 1 shown.

[0032] Example 2

[0033] 1. Balance the inlet and outlet tension of the online leveler: When the automatic welding seam passing program of the online leveler is started, balance the inlet and outlet tension of the online leveler

[0034] 2. The online leveler drops to the set speed: The rolling force of the lower roller of the leveler drops to the minimum rolling force. The speed of the leveler passing the weld can be set on the HMI, and the position to drop to the set speed can be set on the HMI. When the online leveler automatically passes the weld, it will automatically drop according to the current speed, the set speed and the set position. When the set speed is reached, the rolling force of the lower roller of the leveler drops to the minimum rolling force.

[0035] 3. Restore rolling force: The leveler closing position can be set on the HMI. When the leveler reaches the set position, the leveler stop force is restored, and the tension balance at the leveler entrance and exit is canceled after the roll gap closing line number is triggered.

[0036] 4. Speed ​​up to normal operating speed.

[0037] This application reduces the time of the cold wire leveler to pass the weld seam from 1 minute and 30 seconds to 45 seconds when producing thin materials by modifying the leveler passing the weld seam mode, saving about 40 seconds of the time of passing the weld seam, and the exit looper amount after passing the weld seam is about 20%. When the running speed of the middle part of the cold wire is guaranteed to be 150m / min, when the tail of the cold wire is unloaded, the exit looper amount is too large, and the middle part of the cold wire needs to be slowed down to unload the coil normally.

[0038] The operators can select between slightly open roller and non-open roller according to the production situation. The mode selection buttons are all on the HMI (human-machine interface). In some places, the welding machine uses laser welding and the weld mouth is relatively flat, so non-open roller can be used. In some places, the welding machine uses lap welding, so non-open roller must be used to prevent damage to the working roller.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The process of passing the weld seam with a non-open roller or slightly open roller on an online flattening machine is characterized by: The steps include: S1: Start the automatic welding seam passing program of the online leveling machine, and select the non-opening roller or slightly opening roller according to the situation of the welding machine; S2: The online skin pass mill reduces its speed to reduce the rolling force of the lower roll of the skin pass mill to the minimum rolling force; S3: The leveling machine speeds up and operates normally.

2. The process for passing the weld seam with a non-roller or slightly-roller-opened online skin-passing machine according to claim 1 is characterized in that: Step S1 also includes balancing the inlet and outlet tensions of the online leveling machine, and the tensions are both 20-45 MPa.

3. The process for passing the weld seam with a non-roller or slightly-roller-opened online flattening machine according to claim 1 is characterized in that: In step S1, if the welding machine uses laser welding or lap welding, and the interface is flat, then the roller is not opened, otherwise, a slightly opened roller is used.

4. The process method for passing the weld seam with a non-roller or slightly-roller-opened online skin-passing machine according to claim 1 is characterized in that: If a slightly open roller is selected in step S1, step S1 also includes opening the polisher; Step S3 also includes opening the lower working roll of the online leveling machine to a specified position. The leveling machine closing position can be set on the HMI. When the set position is reached, the lower working roll of the leveling machine is closed, and after the roll gap closing line number is triggered, the tension balance of the leveling machine entrance and exit is canceled and the polisher is closed.

5. The process method for passing the weld seam with a non-open roller or slightly-open roller of an online flattening machine according to claim 4 is characterized in that: When the roll is slightly opened in step S3, the lower working roll of the online leveling machine is opened to a position of 4.5-5.5 mm.

6. The process for passing the weld seam with a non-roller or slightly-roller-opened online flattening machine according to claim 1 is characterized in that: In step S1, it is selected not to open the rollers, and step S3 also includes setting the closing position of the leveling machine on the HMI, restoring the stopping force of the leveling machine when reaching the set position, and canceling the tension balance of the leveling machine entrance and exit after the roller gap closing line number is triggered.

7. The process for passing the weld seam with a non-open roller or slightly open roller of an online skin-passing machine according to claim 1 is characterized in that: Step S2 also includes the mode selection of online leveling as human-machine selection.

8. The on-line flattening machine non-roller or slightly-roller over-welding process method according to claim 1 is characterized in that: In step S2, the speed of the online leveling machine after reduction is 19-21 m / min.

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