A strip steel welding method

Abstract

The present application discloses a strip steel welding method, the method comprising: storing a first preset length of the outlet strip steel in a deviation correction roller group at the outlet of a welding machine; when the outlet strip steel and the inlet strip steel meet the overlap requirements, using a welding machine to weld the outlet strip steel and the inlet strip steel to obtain a target weld; if the target weld seam does not meet the preset requirements, cutting off the target weld seam and the strip steel at the jaw position of the welding machine; using the deviation correction roller group to release the stored outlet strip steel toward the inlet strip steel, and controlling the inlet strip steel to move toward the outlet strip steel, so that the outlet strip steel and the inlet strip steel meet the overlap requirements, and using the welding machine to re-weld the outlet strip steel and the inlet strip steel. The present application can reduce the quality risk when re-welding the strip steel.

Description

Technical Field

[0001] The present application relates to the technical field of strip steel welding, and in particular, to a strip steel welding method. Background Art

[0002] In the cold rolling recoiling unit, when a welding machine is used to weld the strip steel, if the weld quality does not meet the standard, it is necessary to cut off the strip steel and the weld seam at the welding machine jaw position, and then control the strip steel on the inlet and outlet sides of the welding machine to move toward each other in a point-by-point manner to meet the overlap requirements during strip steel welding, so as to re-weld the strip steel.

[0003] Because the strip steel at the outlet side of the welding machine runs through the entire cold rolling recoiling unit, when controlling the strip steel at the outlet side of the welding machine to move in steps, the roller system of the entire unit needs to be reversed. On the one hand, the control difficulty of the roller system transmission is increased. On the other hand, the reversal of the roller system is prone to produce foreign matter, causing damage to the strip steel, thereby reducing the strip steel quality and yield rate. Summary of the invention

[0004] The embodiments of the present application provide a strip steel welding method, which reduces the impact on the quality of the strip steel when the strip steel is re-welded.

[0005] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0006] According to a first aspect of an embodiment of the present application, a strip steel welding method is provided, comprising:

[0007] The deviation correction roller group at the welder outlet stores the outlet strip steel of the first preset length;

[0008] When the outlet steel strip and the inlet steel strip meet the overlap requirements, a welding machine is used to weld the outlet steel strip and the inlet steel strip to obtain a target weld;

[0009] If the target weld does not meet the preset requirements, the target weld and the strip steel at the jaw position of the welding machine are cut off;

[0010] The deviation correction roller group is used to release the stored export strip steel toward the import strip steel, and the import strip steel is controlled to move toward the export strip steel, so that the export strip steel and the import strip steel meet the overlapping requirements, and the welding machine is used to re-weld the export strip steel and the import strip steel.

[0011] In some embodiments of the present application, based on the above scheme, the deviation-correcting roller group includes at least a first roller group and a second roller group, the first roller group is located between the second roller group and the welder, and the deviation-correcting roller group at the welder outlet stores the outlet strip steel of the first preset length, including:

[0012] Controlling the first roller group and the second roller group to rotate in a positive direction to drive the outlet steel strip to move from the welding machine inlet to the welding machine outlet;

[0013] The first preset length of the exit steel strip is stored between the first roll set and the second roll set.

[0014] In some embodiments of the present application, based on the above solution, storing the exit steel strip of the first preset length between the first roll group and the second roll group includes:

[0015] In the process of the outlet steel strip moving from the welding machine inlet to the welding machine outlet, if the distance between the tail of the outlet steel strip and the jaw position of the welding machine is the first preset length for the first time, the rotation speed of the second roller group is controlled to be less than the rotation speed of the first roller group, so that the outlet steel strip is lifted downward;

[0016] When the tail of the exit steel strip reaches the exit clamp position of the welding machine, the second roller group and the first roller group are controlled to stop rotating to store the exit steel strip of the first preset length.

[0017] In some embodiments of the present application, based on the above solution, the first roller group and the second roller group both include a deviation correction roller located below the outlet steel strip and a pressure roller located above the outlet steel strip, and before the outlet steel strip of the first preset length is stored between the first roller group and the second roller group, the following further includes:

[0018] During the process of the outlet strip moving from the welding machine inlet to the welding machine outlet, if the tail of the outlet strip reaches the inlet shear position, the first roller group and the second roller group are controlled to stop rotating, the inlet shear is used to cut off the tail of the outlet strip, and the first roller group and the second roller group are controlled to rotate forward to drive the outlet strip to continue moving from the welding machine inlet to the welding machine outlet, wherein the welding machine inlet is located between the welding machine outlet and the inlet shear.

[0019] In some embodiments of the present application, based on the above solution, before the inlet shear is used to cut off the tail of the outlet steel strip, the method further includes:

[0020] During the process of the outlet steel strip moving from the welding machine inlet to the welding machine outlet, if the outlet steel strip completes tail swinging, the pressing roller is controlled to be pressed down to press the outlet steel strip.

[0021] In some embodiments of the present application, based on the above solution, the use of the deviation-correcting roller group to drive the outlet steel strip to move in the direction of the inlet steel strip includes:

[0022] The second roller group is controlled to stop rotating, and the first roller group is controlled to rotate in the opposite direction, so that the stored outlet steel strip is released toward the inlet steel strip.

[0023] In some embodiments of the present application, based on the above solution, controlling the first roller group to rotate in the opposite direction includes:

[0024] Obtaining a second preset length and rotation speed;

[0025] determining a rotation time according to the second preset length and the rotation speed;

[0026] According to the rotation time and the rotation speed, the first roller group is controlled to rotate in the reverse direction.

[0027] In some embodiments of the present application, based on the above solution, after the outlet steel strip and the inlet steel strip are welded by a welding machine to obtain a target weld, the method further includes:

[0028] If the target weld meets the preset requirements, the deviation-correcting roller group is used to release the stored export strip.

[0029] In some embodiments of the present application, based on the above solution, the step of using the deviation-correcting roller group to release the stored export steel strip includes:

[0030] The rotation speed of the second roller set is controlled to be greater than the rotation speed of the first roller set to release the stored exit steel strip.

[0031] In some embodiments of the present application, based on the above solution, after the deviation-correcting roller group is used to release the stored exit steel strip, the method further includes:

[0032] The first roller group and the second roller group are controlled to rotate in a positive direction at the same speed.

[0033] The beneficial effects of this application are as follows:

[0034] The correcting roller group at the outlet of the welding machine stores the outlet strip of the first preset length. After welding the outlet strip and the inlet strip, a target weld is obtained. If the target weld does not meet the requirements, it is necessary to cut off the target weld and the strip at the jaw position of the welding machine, and re-weld the outlet strip and the inlet strip. When re-welding, only the correcting roller group is used to release the stored outlet strip, and there is no need to reverse the roller system of the entire unit, which reduces the impact on the quality of the strip when re-welding.

[0035] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0037] Figure 1 A schematic diagram showing the use of an existing strip steel welding method;

[0038] Figure 2 A schematic diagram of a strip steel welding method in an embodiment of the present application is shown;

[0039] Figure 3 A flow chart of a strip steel welding method in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] In addition, described feature, structure or characteristic can be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided so as to provide a full understanding of the embodiments of the present application. However, it will be appreciated by those skilled in the art that the technical scheme of the present application can be put into practice without one or more of the specific details, or other methods, components, devices, steps, etc. can be adopted. In other cases, known methods, devices, realizations or operations are not shown or described in detail to avoid blurring the various aspects of the present application.

[0042] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0043] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0044] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0045] Figure 1 The schematic diagram of the use of the existing strip steel welding method is shown. Figure 1 , 1 is an inlet shear, 2 is an inlet strip steel, 3 is an inlet clamp, 4 is a welder, 5 is an outlet clamp, 6 is a deviation correction roller of the first roller group, 7 is a pressure roller of the first roller group, 8 is an outlet strip steel, 9 is a deviation correction roller of the second roller group, 10 is a pressure roller of the second roller group, and 11 is a third deviation correction roller. For a better understanding of the embodiments of the present application, refer to Figure 1 , for explanation:

[0046] The head of the inlet strip and the tail of the outlet strip are overlapped at the jaw position of the welding machine, and the jaw position of the welding machine is located between the inlet jaw and the outlet jaw. The welding machine is used to weld the inlet strip and the outlet strip to obtain the target strip. If the weld meets the requirements, the target strip is taken away from the welding machine. If the weld does not meet the requirements, the weld and the strips on both sides of the weld (the strips at the jaw position of the welding machine) are cut off from both sides of the weld. The head of the inlet strip and the tail of the outlet strip move toward each other and are overlapped again at the jaw position of the welding machine. The inlet strip and the outlet strip are re-welded by the welding machine. When the head of the inlet strip and the tail of the outlet strip move toward each other, the subsequent unit of the outlet strip must reverse the roller system to make the outlet strip retreat. When the subsequent unit of the outlet strip needs to reverse the roller system, the transmission control difficulty increases, and it is also easy to cause the strip to be damaged, affecting the quality of the strip.

[0047] Figure 2 A schematic diagram of a strip steel welding method in an embodiment of the present application is shown. Figure 3 A flow chart of a strip steel welding method in an embodiment of the present application is shown. Figure 2 In the figure, 1 is the inlet shear, 2 is the inlet strip, 3 is the inlet clamp, 4 is the welder, 5 is the outlet clamp, 6 is the deviation correction roller of the first roller group, 7 is the pressure roller of the first roller group, 8 is the outlet strip, 9 is the deviation correction roller of the second roller group, 10 is the pressure roller of the second roller group, 11 is the third deviation correction roller, and 12 is the stored outlet strip, see Figure 1 , Figure 2 and Figure 3 , a strip welding method is provided, comprising at least S1 to S4:

[0048] In step S1, the first preset length of the outlet steel strip is stored in the deflection correction roller group at the outlet of the welding machine. The outlet of the welding machine is located between the deflection correction roller group and the inlet of the welding machine. The first preset length can be an empirical value, such as 100-200 mm, or can be determined according to the length of the steel strip cut off when the weld is unqualified. The first preset length of the outlet steel strip can be understood as the stored outlet steel strip.

[0049] In step S2, when the outlet steel strip and the inlet steel strip meet the overlap requirements, a welding machine is used to weld the outlet steel strip and the inlet steel strip to obtain a target weld, wherein the target weld is a weld formed by welding the tail of the outlet steel strip and the head of the inlet steel strip.

[0050] In step S3, if the target weld does not meet the preset requirements, the target weld and the strip steel at the jaw position of the welding machine are cut off. The preset requirements are quality requirements of the weld. If the target weld has cracks or cracks appear after the target weld is struck, the target weld does not meet the preset requirements.

[0051] In step S4, the deviation correction roller group is used to release the stored export strip steel in the direction of the import strip steel, and the import strip steel is controlled to move in the direction of the export strip steel, so that the export strip steel and the import strip steel meet the overlapping requirements, and the welding machine is used to re-weld the export strip steel and the import strip steel.

[0052] In some embodiments, the deviation correction roller group includes at least a first roller group and a second roller group, the first roller group is located between the second roller group and the welder, and the deviation correction roller group at the welder outlet stores the first preset length of the export strip steel, including: controlling the first roller group and the second roller group to rotate forward to drive the export strip steel to move from the welder inlet to the welder outlet; storing the export strip steel of the first preset length between the first roller group and the second roller group. When re-welding, the export strip steel stored between the first roller group and the second roller group is released toward the inlet strip steel.

[0053] In some embodiments, the deviation-correcting roller group further includes a third deviation-correcting roller, wherein the third deviation-correcting roller is located between the first roller group and the second roller group, and the third deviation-correcting roller is located above the exit steel strip.

[0054] In some embodiments, the storing of the first preset length of the export strip between the first roller group and the second roller group includes: when the export strip moves from the welder inlet to the welder outlet, if the distance between the tail of the export strip and the jaw position of the welder is the first preset length for the first time, controlling the rotation speed of the second roller group to be less than the rotation speed of the first roller group, so that the export strip is pulled downward; when the tail of the export strip reaches the welder outlet jaw position, controlling the second roller group and the first roller group to stop rotating, so as to store the first preset length of the export strip. When the rotation speed of the second roller group is less than the rotation speed of the first roller group, the length of the export strip carried away by the second roller group is less than the length of the export strip carried away by the first roller group, and the export strip will be pulled downward. As time goes by, the length of the pulled export strip increases continuously, so as to store the export strip.

[0055] In some embodiments, the first roller group and the second roller group both include a deflection correction roller located below the outlet strip and a pressure roller located above the outlet strip. Before the outlet strip of the first preset length is stored between the first roller group and the second roller group, the process further includes: during the process of the outlet strip moving from the welder inlet to the welder outlet, if the tail of the outlet strip reaches the inlet shear position, the first roller group and the second roller group are controlled to stop rotating, the inlet shear is used to cut off the tail of the outlet strip, and the first roller group and the second roller group are controlled to rotate forward to drive the outlet strip to continue to move from the welder inlet to the welder outlet, wherein the welder inlet is located between the welder outlet and the inlet shear. Controlling the first roller group to stop rotating means controlling the deflection correction roller and the pressure roller of the first roller group to stop rotating, and controlling the second roller group to stop rotating means controlling the deflection correction roller and the pressure roller of the second roller group to stop rotating.

[0056] In some embodiments, before the inlet shear is used to cut off the tail of the outlet steel strip, the method further includes: in the process of the outlet steel strip moving from the welder inlet to the welder outlet, if the outlet steel strip has completed tail swinging, controlling the pressure roller to press down to press the outlet steel strip. When the outlet steel strip has completed tail swinging, the pressure roller is used to press the outlet steel strip, so that the outlet steel strip runs stably.

[0057] In some embodiments, the use of the deviation-correcting roller group to drive the outlet steel strip to move in the direction of the inlet steel strip includes: controlling the second roller group to stop rotating, and controlling the first roller group to rotate in the opposite direction, so that the stored outlet steel strip is released in the direction of the inlet steel strip. Figure 2 , the outlet strip is released to the right.

[0058] In some embodiments, controlling the first roller group to rotate in the opposite direction includes: obtaining a second preset length and a rotation speed; determining a rotation time according to the second preset length and the rotation speed; and controlling the first roller group to rotate in the opposite direction according to the rotation time and the rotation speed. The second preset length may be an empirical value, such as 50-80 mm, or may be set according to the length of the strip to be cut.

[0059] In some embodiments, after the export steel strip and the import steel strip are welded by a welding machine to obtain a target weld, the method further includes: if the target weld meets a preset requirement, the deviation correction roller group is used to release the stored export steel strip.

[0060] In some embodiments, the use of the deviation-correcting roller group to release the stored export steel strip includes: controlling the rotation speed of the second roller group to be greater than the rotation speed of the first roller group to release the stored export steel strip.

[0061] In some embodiments, after the stored exit steel strip is released by using the deviation-correcting roller group, the method further includes: controlling the first roller group and the second roller group to rotate in the same direction at the same speed.

[0062] In some embodiments, the exit steel strip is the entry steel strip of a previous welding, and the entry steel strip is the exit steel strip of a next welding.

[0063] In the present application, the correcting roller group at the outlet of the welding machine stores the outlet strip of the first preset length. After welding the outlet strip and the inlet strip, a target weld is obtained. If the target weld does not meet the requirements, it is necessary to cut off the target weld and the strip at the jaw position of the welding machine, and re-weld the outlet strip and the inlet strip. When re-welding, only the correcting roller group is used to release the stored outlet strip, and there is no need to reverse the roller system of the entire unit, thereby reducing the impact on the quality of the strip when re-welding the strip.

[0064] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on a computer-readable medium or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of the present application and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these. In addition, each functional unit may be integrated into a processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit.

[0065] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0066] The units described as separate components may or may not be physically separated, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed in multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0067] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read~Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc., which can store program code.

[0068] The above description is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. A strip steel welding method, characterized in that: include: The deviation correction roller group at the welder outlet stores the outlet steel strip of the first preset length; When the outlet steel strip and the inlet steel strip meet the overlap requirements, a welding machine is used to weld the outlet steel strip and the inlet steel strip to obtain a target weld; If the target weld does not meet the preset requirements, the target weld and the strip steel at the jaw position of the welding machine are cut off; The deviation correction roller group is used to release the stored export strip steel toward the import strip steel, and the import strip steel is controlled to move toward the export strip steel, so that the export strip steel and the import strip steel meet the overlapping requirements, and the welding machine is used to re-weld the export strip steel and the import strip steel.

2. A strip steel welding method according to claim 1, characterized in that: The deviation-correcting roller group at least comprises a first roller group and a second roller group, wherein the first roller group is located between the second roller group and the welder, and the deviation-correcting roller group at the welder outlet stores the outlet strip steel of the first preset length, comprising: Controlling the first roller group and the second roller group to rotate in a positive direction to drive the outlet steel strip to move from the welding machine inlet to the welding machine outlet; The first preset length of the exit steel strip is stored between the first roll set and the second roll set.

3. A strip steel welding method according to claim 2, characterized in that: The step of storing the first preset length of the exit steel strip between the first roll group and the second roll group comprises: In the process of the outlet steel strip moving from the welding machine inlet to the welding machine outlet, if the distance between the tail of the outlet steel strip and the jaw position of the welding machine is the first preset length for the first time, the rotation speed of the second roller group is controlled to be less than the rotation speed of the first roller group, so that the outlet steel strip is lifted downward; When the tail of the exit steel strip reaches the exit clamp position of the welding machine, the second roller group and the first roller group are controlled to stop rotating to store the exit steel strip of the first preset length.

4. A strip steel welding method according to claim 2, characterized in that: The first roller group and the second roller group both include a deviation correction roller located below the outlet steel strip and a pressure roller located above the outlet steel strip. Before the outlet steel strip of the first preset length is stored between the first roller group and the second roller group, the method further includes: During the process of the outlet strip moving from the welding machine inlet to the welding machine outlet, if the tail of the outlet strip reaches the inlet shear position, the first roller group and the second roller group are controlled to stop rotating, the inlet shear is used to cut off the tail of the outlet strip, and the first roller group and the second roller group are controlled to rotate forward to drive the outlet strip to continue moving from the welding machine inlet to the welding machine outlet, wherein the welding machine inlet is located between the welding machine outlet and the inlet shear.

5. A strip steel welding method according to claim 4, characterized in that: Before the inlet shearing method is used to cut off the tail of the outlet steel strip, the method further comprises: During the process of the outlet steel strip moving from the welding machine inlet to the welding machine outlet, if the outlet steel strip completes tail swinging, the pressing roller is controlled to be pressed down to press the outlet steel strip.

6. A strip steel welding method according to claim 2, characterized in that: The use of the deviation-correcting roller group to drive the outlet steel strip to move in the direction of the inlet steel strip includes: The second roller group is controlled to stop rotating, and the first roller group is controlled to rotate in the opposite direction, so that the stored outlet steel strip is released toward the inlet steel strip.

7. A strip steel welding method according to claim 6, characterized in that: The controlling the first roller group to rotate in the opposite direction comprises: Obtaining a second preset length and rotation speed; determining a rotation time according to the second preset length and the rotation speed; According to the rotation time and the rotation speed, the first roller group is controlled to rotate in the reverse direction.

8. A strip steel welding method according to claim 2, characterized in that: After the outlet steel strip and the inlet steel strip are welded by a welding machine to obtain a target weld, the method further includes: If the target weld meets the preset requirements, the deviation-correcting roller group is used to release the stored export strip.

9. A strip steel welding method according to claim 8, characterized in that: The method of releasing the stored export steel strip by using the deviation-correcting roller group comprises: The rotation speed of the second roller set is controlled to be greater than the rotation speed of the first roller set to release the stored exit steel strip.

10. A strip steel welding method according to claim 2, characterized in that: After the deviation-correcting roller group is used to release the stored exit steel strip, the method further comprises: The first roller group and the second roller group are controlled to rotate in a positive direction at the same speed.

Images