Welding slag purging device and method for withdrawal and straightening welding machine

Abstract

The invention discloses a device and a method for purging welding slag of a withdrawal and straightening welding machine, which are applied to the technical field of equipment control and comprise an upper welding wheel and a lower welding wheel, a welding machine frame; the purging assembly comprises a spray head and a compressed gas supply part, the spray head communicates with the compressed gas supply part, the spray head is installed on the welding machine frame, and the spray head faces the position, close to the upper welding wheel and the lower welding wheel, of the strip steel; the spray head is used for providing compressed gas to the surface of the strip steel; and the controller is used for controlling starting and stopping of the purging assembly according to the running state of the upper welding wheel and the running state of the lower welding wheel, and the controller is connected with the welding wheels and the purging assembly. The welding slag purging device of the withdrawal and straightening welding machine is simple in structure, low in cost, low in failure rate, high in reliability and stable in use process, and can be widely applied to welding slag purging scenes of hidden parts of strip steel lap welding machines.

Description

Technical Field

[0001] The invention relates to the technical field of equipment control, and in particular to a welding slag purging device and method for a straightening welding machine. Background Art

[0002] During the cold rolling production process of plates and strips, the process setting requires that the tail of the previous roll of strip and the head of the next roll of strip be welded together using a lap welder in the straightening unit to facilitate strip production.

[0003] In the related technology, during welding, if the surface of the welding wheel is oily or the welding machine current is not appropriate, after the strip is welded, the welding slag scattered at the weld will remain on the surface of the strip. If it is not cleaned in time, the welding slag scattered on the surface of the strip during production will not only reduce the cleanliness of the strip surface and affect the product quality image, but also cause iron powder to accumulate in the roller and affect its normal rotation. In severe cases, it will cause the roller to get stuck and shorten its service life.

[0004] Therefore, how to improve the welding quality of strip steel is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide a welding slag purging device and method for a straightening welding machine, which is used to synchronously remove welding slag on the surface of a steel strip, improve the surface cleanliness of the steel strip, and ensure the welding quality of the steel strip.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A welding slag purging device for a straightening welding machine, comprising:

[0008] The upper welding wheel and the lower welding wheel are used to weld the overlapping parts of two adjacent steel strips, the steel strips are located between the upper welding wheel and the lower welding wheel, and the steel strips can move under the rotation of the upper welding wheel and the lower welding wheel;

[0009] A welding machine frame, used for mounting the upper welding wheel and the lower welding wheel;

[0010] A purge assembly, the purge assembly comprising a nozzle and a compressed gas supply component, the nozzle being in communication with the compressed gas supply component, the nozzle being mounted on the welding machine frame, and the nozzle being oriented toward the strip steel near the upper welding wheel and the lower welding wheel, and the nozzle being used to provide compressed gas to the surface of the strip steel;

[0011] The controller is used to control the start and stop of the purge assembly according to the operating status of the upper welding wheel and the lower welding wheel, and the controller is connected to the welding wheel and the purge assembly.

[0012] On the other hand, the purge assembly includes a purge frame, the nozzle is mounted on the purge frame, the purge frame is mounted on the welding machine frame, and the purge frame is located at the back of the upper welding wheel and the lower welding wheel.

[0013] On the other hand, it also includes a translation component, the purge frame is connected to the welding machine frame through the translation component, the translation component is connected to the controller, and the controller is also used to control the movement of the translation component according to the rotation direction of the upper welding wheel and the lower welding wheel to change the position of the purge frame.

[0014] On the other hand, it also includes a quick-release mechanism, and the purge frame and the welding machine frame are detachably connected through the quick-release mechanism.

[0015] On the other hand, it also includes a slag receiving component for carrying welding slag, which is installed on the welding machine frame and is located at the bottom of the steel strip.

[0016] On the other hand, the slag receiving component is located on a side of the welding machine frame away from the purge assembly, and the slag receiving component is detachably connected to the welding machine frame.

[0017] On the other hand, it also includes a slide rail and a driving component, both of which are installed on the welding machine frame, and the driving end of the driving component is connected to the slag connecting component, which is used to push the slag connecting component to move on the slide rail so that the slag connecting component moves from one side of the upper welding wheel and the lower welding wheel to the other side.

[0018] On the other hand, the slide rail is parallel to the extension direction of the overlapped portion, the number of the slide rails is at least two, and a slide groove is provided at the bottom of the slag receiving component, and the slide groove is adapted to the slide rail.

[0019] A method for purging welding slag of a straightening welding machine comprises the following steps:

[0020] Acquire the operating status of the upper welding wheel and the lower welding wheel, and start the purge assembly when the upper welding wheel and the lower welding wheel start welding;

[0021] Controlling the compressed gas supply component to supply compressed gas to the nozzle, and controlling the pressure of the nozzle to be a target pressure;

[0022] When the upper welding wheel and the lower welding wheel stop welding, closing the purge assembly;

[0023] The amount of welding slag on the surface of the steel strip is judged. When the amount of welding slag on the surface of the steel strip is ≥ a preset amount, the target pressure is increased; when the amount of welding slag on the surface of the steel strip is < a preset amount, the target pressure is reduced.

[0024] On the other hand, the welding slag purging device of the straightening welding machine further includes a translation component, and the translation component is connected to the controller; before starting the purging component, it also includes the steps of:

[0025] Determining the rotation direction of the upper welding wheel and the lower welding wheel;

[0026] Determining the moving direction of the steel strip according to the rotation directions of the upper welding wheel and the lower welding wheel;

[0027] According to the moving direction of the steel strip, the translation component is controlled to move, and the translation component drives the purge frame to move to the back of the upper welding wheel and the lower welding wheel.

[0028] The welding slag purging device of the straightening welding machine provided by the present invention comprises: an upper welding wheel and a lower welding wheel, which are used for welding the overlapping parts of two adjacent steel strips, the steel strip is located between the upper welding wheel and the lower welding wheel, and the steel strip can move under the rotation of the upper welding wheel and the lower welding wheel; a welding machine frame, which is used to install the upper welding wheel and the lower welding wheel; a purging assembly, which comprises a nozzle and a compressed gas supply component, the nozzle is connected to the compressed gas supply component, the nozzle is installed on the welding machine frame, and the nozzle is facing the position of the upper welding wheel and the lower welding wheel on the steel strip, and the nozzle is used to provide compressed gas to the surface of the steel strip; a controller, which is used to control the start and stop of the purging assembly according to the operating status of the upper welding wheel and the lower welding wheel, and the controller is connected to the welding wheel and the purging assembly. The welding slag purging device for a straightening welding machine provided by the present invention installs the purging assembly on the welding machine frame, utilizes the compressed gas supply component in the purging assembly to provide compressed gas to the nozzle, and then removes the welding slag on the surface of the weld seam of the cold-rolled strip steel. The purging assembly is started synchronously with the upper welding wheel and the lower welding wheel, and can maintain the purging of the welding slag during the entire welding process, thereby ensuring the surface finish of the strip steel and reducing the influence of the welding slag on the upper welding wheel and the lower welding wheel. The welding slag purging device for a straightening welding machine has a simple structure, low cost, low failure rate, high reliability, and stable use process. It can be widely used in welding slag purging scenarios of hidden parts of various strip steel lap welding machines, and can be widely used in steel rolling systems in cold rolling, hot rolling and other related fields.

[0029] The welding slag purging method of the straightening welding machine provided by the present invention comprises the following steps: obtaining the operating status of the upper welding wheel and the lower welding wheel, and starting the purging assembly when the upper welding wheel and the lower welding wheel start welding; controlling the compressed gas supply component to supply compressed gas to the nozzle, and controlling the pressure of the nozzle to be a target pressure; closing the purging assembly when the upper welding wheel and the lower welding wheel stop welding; judging the amount of welding slag on the surface of the strip, and when the amount of welding slag on the surface of the strip is ≥ a preset amount, increasing the target pressure; and when the amount of welding slag on the surface of the strip is < a preset amount, reducing the target pressure. The welding slag purging method for a straightening welding machine provided by the present invention obtains the operating status of the upper welding wheel and the lower welding wheel as a basis for judging whether the purging component is started, thereby ensuring that the component removes the welding slag in a timely manner, improves the surface cleanliness of the strip steel, and purifies the operating environment of the strip steel; at the same time, by judging the amount of welding slag on the surface of the strip steel, it is judged whether the purging effect of the purging component reaches the expected level, thereby providing a reference for the pressure of the nozzle during the next welding, ensuring that the amount of welding slag of the strip steel is gradually reduced during continuous welding production, and avoiding waste caused by excessive pressure of the nozzle and influence on the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic structural diagram of a specific implementation of the welding slag purging device for a straightening welding machine provided by the present invention;

[0032] Figure 2 This is a schematic structural diagram of a translation component in a welding slag purging device for a tension-leveling welding machine provided by the present invention;

[0033] Figure 3 It is a structural schematic diagram of the slag receiving component in the welding slag purging device of the tension and straightening welding machine provided by the present invention;

[0034] Figure 4 The present invention provides a flow chart of the welding slag purging method for a straightening welding machine.

[0035] Reference numerals:

[0036] Upper welding wheel 1; lower welding wheel 2; strip steel 3; welding machine frame 4; purge assembly 5; nozzle 5-1; compressed gas supply component 5-2; purge frame 5-3; translation component 6; slag receiving component 7; slide rail 7-1; driving component 7-2. DETAILED DESCRIPTION

[0037] The core of the present invention is to provide a welding slag purging device and method for a straightening welding machine, which can avoid the influence of welding slag on strip steel and rollers, improve the yield of strip steel, and increase the service life of rollers.

[0038] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0039] Please refer to Figures 1 to 3 As shown, Figure 1 A schematic structural diagram of a specific implementation of the welding slag purging device for a straightening welding machine provided by the present invention; Figure 2 This is a schematic structural diagram of a translation component in a welding slag purging device for a tension-leveling welding machine provided by the present invention; Figure 3 The present invention is a schematic structural diagram of the slag receiving component in the slag blowing device of the tension and straightening welding machine provided by the present invention.

[0040] In this embodiment, the slag purging device of the tension and straightening welding machine includes:

[0041] The upper welding wheel 1 and the lower welding wheel 2 are used to weld the overlapping parts of two adjacent steel strips 3. The steel strip 3 is located between the upper welding wheel 1 and the lower welding wheel 2. The steel strip 3 can move under the rotation of the upper welding wheel 1 and the lower welding wheel 2.

[0042] A welding machine frame 4, used for mounting an upper welding wheel 1 and a lower welding wheel 2;

[0043] The purge assembly 5 includes a nozzle 5-1 and a compressed gas supply component 5-2. The nozzle 5-1 is connected to the compressed gas supply component 5-2. The nozzle 5-1 is installed on the welding machine frame 4, and the nozzle 5-1 faces the position of the strip steel 3 close to the upper welding wheel 1 and the lower welding wheel 2. The nozzle 5-1 is used to provide compressed gas to the surface of the strip steel 3;

[0044] The controller is used to control the start and stop of the purge assembly 5 according to the operating status of the upper welding wheel 1 and the lower welding wheel 2, and the controller is connected to the welding wheel and the purge assembly 5.

[0045] Specifically, when two rolls of steel strips 3 need to be welded, the edges of the two rolls of steel strips 3 are overlapped to form an overlapping portion, and the upper welding wheel 1 and the lower welding wheel 2 serve as two poles respectively. There is a gap between the upper welding wheel 1 and the lower welding wheel 2 for the overlapping portion of the steel strips 3 to be placed in. The rotation of the upper welding wheel 1 and the lower welding wheel 2 drives the overlapping portions of the two steel strips 3 to move, and at the same time, the overlapping portions are welded and fixed to form a weld.

[0046] The slag purging device of the straightening welding machine is installed with a purging assembly 5 on a welding machine frame 4, and a compressed gas supply component 5-2 in the purging assembly 5 is used to provide compressed gas to a nozzle 5-1, and then the slag on the surface of the weld of the cold-rolled strip steel 3 is removed. The purging assembly 5 is started synchronously with the upper welding wheel 1 and the lower welding wheel 2, and the slag can be purged during the entire welding process to ensure the surface finish of the strip steel 3 and reduce the influence of the slag on the upper welding wheel 1 and the lower welding wheel 2. The slag purging device of the straightening welding machine has a simple structure, low cost, low failure rate, high reliability, and stable use process. It can be widely used in slag purging scenarios of hidden parts of various strip steel 3 lap welding machines, and can be widely used in cold rolling, hot rolling and other related steel rolling systems.

[0047] In some embodiments, the purge assembly 5 includes a purge frame 5-3, which can be formed by welding and fixing a plurality of metal rods. The purge frame 5-3 is used to support the nozzle 5-1. In order to facilitate adjustment and improve the scope of application, the nozzle 5-1 can be movably mounted on the purge frame 5-3, that is, the spray angle of the nozzle 5-1 is adjustable, which can be adjusted electrically or manually; further, the nozzle 5-1 is mounted on the purge frame 5-3, and a detachable connection can be adopted to facilitate the replacement and maintenance of the nozzle 5-1. The purge frame 5-3 is mounted on the welding machine frame 4, and the purge frame 5-3 is located on the back of the upper welding wheel 1 and the lower welding wheel 2. The back of the upper welding wheel 1 and the lower welding wheel 2 refers to the side of the upper welding wheel 1 and the lower welding wheel 2 away from the moving direction of the strip steel 3, that is, when the strip steel 3 moves toward the first direction, the purge frame 5-3 is located on the side of the upper welding wheel 1 and the lower welding wheel 2 away from the first direction.

[0048] In some embodiments, a translation component 6 is also included, and the purge frame 5-3 is connected to the welding machine frame 4 through the translation component 6, and the translation component 6 is connected to the controller. The controller is also used to control the movement of the translation component 6 according to the rotation direction of the upper welding wheel 1 and the lower welding wheel 2 to change the position of the purge frame 5-3; specifically, the translation component 6 can be a telescopic rod, a slide rail 7-1, a manipulator and other structures. The function of the translation component 6 is to drive the purge frame 5-3 to move. The translation component 6 is installed on the welding machine frame 4. A slide groove can be provided on the side wall of the translation component 6. The purge frame 5-3 is moved by a pulley. It is installed in the slide groove of the translation component 6. When the position of the purge frame 5-3 needs to be changed, it can be moved in the slide groove through the pulley; the corners of the translation component 6 can adopt an arc transition; according to the rotation direction of the upper welding wheel 1 and the lower welding wheel 2, that is, the movement direction of the strip steel 3, the movement of the translation component 6 is controlled, thereby driving the purge frame 5-3 to move, and finally realizing the adjustment of the position of the nozzle 5-1. Its purpose is to ensure that the nozzle 5-1 is located on the back of the upper welding wheel 1 and the lower welding wheel 2 when the rotation direction of the upper welding wheel 1 and the lower welding wheel 2 changes, that is, when the welding direction of the strip steel 3 changes.

[0049] In some embodiments, a quick release mechanism is also included, and the purge frame 5-3 is detachably connected to the welding machine frame 4 through the quick release mechanism. The quick release mechanism can be a structure such as a buckle or a bolt, which is convenient for disassembly and assembly of the purge frame 5-3 and adjustment of the position of the purge frame 5-3 to meet the purge effect of the nozzle 5-1 in different scenarios. The purge frame 5-3 can be used as a complete module, and after unified processing, it can be installed on the welding machine frame 4 in different scenarios, which is easy to operate.

[0050] In some embodiments, a slag receiving component 7 for carrying welding slag is also included, which is installed on the welding machine frame 4 and is located at the bottom of the steel strip 3; specifically, the slag receiving component 7 can be a metal box that is resistant to high temperatures and can accommodate welding slag.

[0051] In some embodiments, the slag collecting component 7 is located on a side of the welding machine frame 4 away from the purge assembly 5 to ensure that the welding slag can smoothly fall into the slag collecting component 7. The slag collecting component 7 is detachably connected to the welding machine frame 4 to facilitate the disassembly of the slag collecting component 7 to dump the welding slag.

[0052] In some embodiments, it also includes a slide rail 7-1 and a driving component 7-2, both of which are installed on the welding machine frame 4, and the driving end of the driving component 7-2 is connected to the slag receiving component 7, which is used to push the slag receiving component 7 to move on the slide rail 7-1, so that the slag receiving component 7 moves from one side of the upper welding wheel 1 and the lower welding wheel 2 to the other side; specifically, through the setting of the slide rail 7-1 and the driving component 7-2, the position of the slag receiving component 7 can be conveniently changed, and the position of the slag receiving component 7 can be changed according to the setting position of the nozzle 5-1. The slag receiving component 7 should be located on different sides of the upper welding wheel 1 and the lower welding wheel 2 with the nozzle 5-1 to ensure that the welding slag blown by the nozzle 5-1 can fall into the slag receiving component 7 on the opposite side.

[0053] In some embodiments, the slide rail 7-1 is parallel to the extension direction of the overlapped portion, so that the slag connecting component 7 can be moved from one side of the steel strip 3 to the other side. The number of the slide rails 7-1 is at least two to ensure the stability of the slag connecting component 7. A slide groove is provided at the bottom of the slag connecting component 7, and the slide groove is adapted to the slide rail 7-1 to ensure that the slag connecting component 7 can move smoothly.

[0054] In some embodiments, the driving component 7-2 is a cylinder, the cylinder body of the cylinder is installed on the welding machine frame 4, the piston rod of the cylinder is connected to the slag receiving component 7, and the driving component 7-2 is connected to the controller. The cylinder is easy to control and only needs to push the slag receiving component 7; further, the slag receiving component 7 should have at least part of its structure extending to the outside of the strip steel 3 in order to better bear the welding slag.

[0055] In addition to the above-mentioned slag purging device for the straightening welding machine, a straightening welding machine is also provided, including the above-mentioned slag purging device for the straightening welding machine. Other structures of the straightening welding machine can refer to related technologies.

[0056] In addition to the above-mentioned slag purging device for a straightening welding machine, the present invention also provides a slag purging method for a straightening welding machine, which can adopt the above-mentioned slag purging device for a straightening welding machine, and of course, other devices capable of executing the method can also be adopted. The slag purging method for a straightening welding machine comprises the following steps:

[0057] Step S1: obtaining the operating status of the upper welding wheel 1 and the lower welding wheel 2, and starting the purge assembly 5 when the upper welding wheel 1 and the lower welding wheel 2 start welding;

[0058] Step S2: Control the compressed gas supply component 5-2 to supply compressed gas to the nozzle 5-1, and control the pressure of the nozzle 5-1 to be the target pressure;

[0059] Step S3: When the upper welding wheel 1 and the lower welding wheel 2 stop welding, the purge assembly 5 is closed;

[0060] Step S4: Determine the amount of welding slag on the surface of the steel strip 3. When the amount of welding slag on the surface of the steel strip 3 is ≥ the preset amount, increase the target pressure; when the amount of welding slag on the surface of the steel strip 3 is < the preset amount, reduce the target pressure.

[0061] The welding slag purging method of the straightening welding machine obtains the operating status of the upper welding wheel 1 and the lower welding wheel 2 as the basis for judging whether the purging component 5 is started, so as to ensure that the component removes the welding slag in time, improve the surface cleanliness of the steel strip 3, and purify the operating environment of the steel strip 3; at the same time, by judging the amount of welding slag on the surface of the steel strip 3, it is judged whether the purging effect of the purging component 5 reaches the expected level, thereby providing a reference for the pressure of the nozzle 5-1 during the next welding, ensuring that the amount of welding slag of the steel strip 3 is gradually reduced during continuous welding production, and avoiding waste caused by excessive pressure of the nozzle 5-1 and influence on the welding process.

[0062] In some embodiments, the welding slag purging device of the straightening welding machine further includes a translation component 6, and the translation component 6 is connected to the controller; before starting the purging component 5, the steps are also included:

[0063] Determine the rotation direction of the upper welding wheel 1 and the lower welding wheel 2;

[0064] The moving direction of the steel strip 3 is determined according to the rotation direction of the upper welding wheel 1 and the lower welding wheel 2;

[0065] According to the moving direction of the steel strip 3 , the translation component 6 is controlled to move, and the translation component 6 drives the purge frame 5 - 3 to move to the back of the upper welding wheel 1 and the lower welding wheel 2 .

[0066] Specifically, according to the rotation direction of the upper welding wheel 1 and the lower welding wheel 2, that is, the moving direction of the steel strip 3, the movement of the translation component 6 is controlled, and the translation component 6 drives the purging frame 5-3 to move, and finally the position of the nozzle 5-1 is changed; the above steps can change the position of the nozzle 5-1 in time when the rotation direction of the upper welding wheel 1 and the lower welding wheel 2 changes, that is, when the welding direction of the steel strip 3 changes, to ensure that the nozzle 5-1 is located on the back of the upper welding wheel 1 and the lower welding wheel 2, so as to ensure a good purging effect.

[0067] The welding slag purging device and method of the straightening welding machine provided by the present invention, the nozzle 5-1 is fixed on the back of the welding wheel, after the welding is started, the purge component 5 is automatically opened, and the compressed air passes through the nozzle 5-1 to clean the welding slag on the surface of the strip steel 3; the controller is connected to the power supply through the PLC program, and interlocked with the operating state of the welding machine unit to control the start and stop of the purge component 5. When the welding of the strip steel 3 is started, the controller is powered on to open the purge component 5, and the purge component 5 starts to purge the welding slag on the surface of the strip steel 3. When the welding machine stops, the power is turned off, the purge component 5 stops purging, and the welding slag is collected and cleaned.

[0068] The above is a detailed introduction to the welding slag purging device and method for the straightening welding machine provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A welding slag purging device for a straightening welding machine, characterized in that: include: The upper welding wheel (1) and the lower welding wheel (2) are used to weld the overlapping parts of two adjacent steel strips (3), the steel strip (3) being located between the upper welding wheel (1) and the lower welding wheel (2), and the steel strip (3) being movable under the rotation of the upper welding wheel (1) and the lower welding wheel (2); A welding machine frame (4) used for mounting the upper welding wheel (1) and the lower welding wheel (2); A purge assembly (5), the purge assembly (5) comprising a nozzle (5-1) and a compressed gas supply component (5-2), the nozzle (5-1) being in communication with the compressed gas supply component (5-2), the nozzle (5-1) being mounted on the welding machine frame (4), and the nozzle (5-1) being directed toward a position on the steel strip (3) close to the upper welding wheel (1) and the lower welding wheel (2), the nozzle (5-1) being used to provide compressed gas to the surface of the steel strip (3); A controller is used to control the start and stop of the purge assembly (5) according to the operating states of the upper welding wheel (1) and the lower welding wheel (2), and the controller is connected to the welding wheel and the purge assembly (5).

2. The welding slag purging device of the tension and straightening welding machine according to claim 1 is characterized in that: The purge assembly (5) comprises a purge frame (5-3), the nozzle (5-1) is mounted on the purge frame (5-3), the purge frame (5-3) is mounted on the welding machine frame (4), and the purge frame (5-3) is located at the back of the upper welding wheel (1) and the lower welding wheel (2).

3. The welding slag purging device of the tension and straightening welding machine according to claim 2 is characterized in that: The invention also comprises a translation component (6), wherein the purge frame (5-3) is connected to the welding machine frame (4) via the translation component (6), and the translation component (6) is connected to the controller. The controller is also used to control the movement of the translation component (6) according to the rotation direction of the upper welding wheel (1) and the lower welding wheel (2), so as to change the position of the purge frame (5-3).

4. The welding slag purging device of the tension and straightening welding machine according to claim 2 is characterized in that: It also comprises a quick-release mechanism, through which the purge frame (5-3) and the welding machine frame (4) are detachably connected.

5. The welding slag purging device for a straightening welding machine according to any one of claims 1 to 4, characterized in that: It also comprises a slag receiving component (7) for carrying welding slag, which is installed on the welding machine frame (4), and the slag receiving component (7) is located at the bottom of the steel strip (3).

6. The welding slag purging device for a tension and straightening welding machine according to claim 5, characterized in that: The slag receiving component (7) is located on a side of the welding machine frame (4) away from the purge assembly (5), and the slag receiving component (7) is detachably connected to the welding machine frame (4).

7. The welding slag purging device of the tension and straightening welding machine according to claim 6 is characterized in that: It also includes a slide rail (7-1) and a driving component (7-2), wherein the slide rail (7-1) and the driving component (7-2) are both mounted on the welding machine frame (4), and the driving end of the driving component (7-2) is connected to the slag receiving component (7) for pushing the slag receiving component (7) to move on the slide rail (7-1), so that the slag receiving component (7) moves from one side of the upper welding wheel (1) and the lower welding wheel (2) to the other side.

8. The welding slag purging device for a straightening welding machine according to claim 7, characterized in that: The slide rail (7-1) is parallel to the extension direction of the overlapped portion, the number of the slide rails (7-1) is at least two, and a slide groove is provided at the bottom of the slag receiving component (7), and the slide groove is adapted to the slide rail (7-1).

9. A method for blowing away welding slag of a straightening welding machine, using the device for blowing away welding slag of a straightening welding machine as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: Acquiring the operating states of the upper welding wheel (1) and the lower welding wheel (2), and starting the purge assembly (5) while the upper welding wheel (1) and the lower welding wheel (2) start welding; Controlling the compressed gas supply component (5-2) to supply compressed gas to the nozzle (5-1), and controlling the pressure of the nozzle (5-1) to be a target pressure; When the upper welding wheel (1) and the lower welding wheel (2) stop welding, the purge assembly (5) is closed; The amount of welding slag on the surface of the steel strip (3) is determined, and when the amount of welding slag on the surface of the steel strip (3) is greater than or equal to a preset amount, the target pressure is increased; when the amount of welding slag on the surface of the steel strip (3) is less than the preset amount, the target pressure is reduced.

10. The welding slag purging method for a straightening welding machine according to claim 9, wherein the welding slag purging device for a straightening welding machine further comprises a translation component (6), and the translation component (6) is connected to the controller; characterized in that: Before starting the purge assembly (5), the method further comprises the following steps: Determining the rotation direction of the upper welding wheel (1) and the lower welding wheel (2); Determining the moving direction of the steel strip (3) according to the rotation directions of the upper welding wheel (1) and the lower welding wheel (2); The movement of the translation component (6) is controlled according to the moving direction of the steel strip (3), and the translation component (6) drives the blowing frame (5-3) to move to the back of the upper welding wheel (1) and the lower welding wheel (2).

Images