Welding and welding jig monitoring system

Abstract

According to one example of the present invention, in order to improve welding defects caused by a welding cap, there may be provided a welding system comprising: a welding cap having an opening corresponding to a formed welding line and provided to surround a welding part and a welding line at the top of a welding object when welding the welding object; an image capturing means that captures an image of the welding line after welding is completed, and captures an image of the periphery of the opening of the welding cover while waiting for welding; a focus adjusting member coupled to the photographing member to adjust a photographing focus of the photographing member when photographing the welding line and the welding cover; a cover lifting part which lowers the welding cover to be close to a welding object for welding and lifts the welding cover to be spaced apart from the welding object after welding is completed; and the monitoring part monitors the welding state and the state of the welding cover through shooting information of the shooting part.

Description

Technical Field

[0001] The present invention relates to a welding monitoring system and method thereof, and more particularly to a welding and welding fixture monitoring system, which can improve welding defects caused by the welding fixture by monitoring the state of the welding fixture. Background Art

[0002] Welding using laser can be used to join a plurality of plates in a stacked state or to join a plurality of plates in a state where their parts partially overlap. In addition, laser welding can be used to join a plurality of plates where they extend on the same surface. Laser welding can also be performed manually, but when production efficiency is improved and the welding process is performed in large quantities, automatic laser welding can be performed.

[0003] Lasers may be used for spot welding, in which a plurality of spots may be formed in a row, or the spots may be formed in a plurality of rows.

[0004] Figures 1 to 3 An example in which welding is automatically performed by a welding jig in conventional laser welding is shown.

[0005] As shown in the figure, when welding the first plate 1 and the second plate 2, a welding jig 10 that pressurizes the first plate 1 and the second plate 2 can be used to prevent separation between the first plate 1 and the second plate 2. The welding jig 10 is moved to the welding surface position h0 by the lifting member 11 during welding, and is moved to the welding waiting position h1 after the welding is completed.

[0006] That is, when welding is completed, the welding fixture 10 rises and the welded plate can be moved to the next process. Afterwards, when the plate to be welded is transferred to the welding position and the welding fixture 10 descends, these plates can be fixed.

[0007] When the welding part 20 is welded, the welding jig 10 presses the first plate 1 and the second plate 2, so that the welding line is included between the first plate 1 and the second plate 2. At this time, the welding jig 10 can be set to surround the welding line. When the welding part 20 is welded, foreign matter 4 (splash) generated during the welding of the first plate 1 and the second plate 2 adheres to the welding jig 10, thereby preventing them from splashing into the first plate 1 and the second plate 2.

[0008] At the same time, the photographing component 30 is configured to monitor the welding quality. The photographing component is configured to photograph the welding line surrounded by the welding fixture 10. Since the position of the welding line is always fixed, the focus of the photographing component is also fixed, so it photographs the image of the welding result, thereby monitoring the welding quality.

[0009] That is, since welding is automatically performed, generally, a monitoring system using such a photographing component is mainly used.

[0010] However, such monitoring system only monitors welding results and is not suitable for identifying the causes of welding defects. That is, when welding defects occur, the causes of welding defects can only be identified after the fact without other options.

[0011] In particular, the foreign matter 4 attached to the welding jig 10 becomes an obstacle to the moving path of the welding beam B, so that the energy of the welding beam B cannot be transmitted to the first plate 1 and the second plate 2 as welding objects, so that welding defects may occur. That is, welding defects caused by the foreign matter 4 accumulated in the welding jig 10 are not easy to be monitored and removed in advance.

[0012] In order to solve welding defects caused by the foreign matter 4 of the welding jig 10 obstructing the path of the welding beam B, a subsequent cleaning process of removing the foreign matter 4 from the welding jig 10 is required.

[0013] The conventional photographing component 30 is used to photograph the welding state of the first plate 1 and the second plate 2 as welding objects, wherein the focal point of the photographing component 30 is on the welding surfaces of the first plate 1 and the second plate 2 .

[0014] Generally, the photographing position h2 of the photographing component is fixed, and the position of the welding fixture 10 moves from the welding surface position h0 to the welding waiting position h1. The focus of the photographing component is not on the welding fixture 10, but on the welding surface of the first plate 1 and the second plate 2, so there is a problem that it is difficult to accurately photograph the welding fixture 10 at the welding waiting position h1.

[0015] The welding jig 10 provides a good welding environment by surrounding the welding rod or welding beam B, and is configured to prevent foreign matter (spatter) generated during welding from adhering to the welding line or surrounding plates. Therefore, the welding jig 10 can also be called a welding cover.

[0016] Reference Figure 4 and Figure 5 , the focus of the photographing component 30 is located on the welding surface of the first plate 1 and the second plate 2 , so it is difficult to accurately confirm the state of foreign matter accumulated on the welding jig 10 . Figure 4 is an image captured by the capturing component, Figure 5 Here is an actual photo of the welding jig when the parts were being photographed.

[0017] like Figure 5 As shown, foreign matter 4 may accumulate on the path of the welding beam in the welding jig 10 , and welding defects may be caused by these foreign matter.

[0018] Therefore, there is a need to provide an effective monitoring system that can prevent welding defects in advance by monitoring the state of the welding jig and monitoring the welding quality. Summary of the invention

[0019] Technical issues

[0020] The purpose of the present invention is to solve the problems of traditional welding monitoring systems.

[0021] Through an example of the present invention, it is intended to provide a foreign matter monitoring system for a welding fixture and a method for monitoring foreign matter in a welding fixture, which can focus a shooting component on the welding fixture based on the position information of the welding fixture to obtain shooting information of the welding fixture and monitor the accumulation state of foreign matter in the welding fixture through video.

[0022] An example of the present invention is to provide a monitoring system and method, which can monitor the state of a welding fixture and the welding quality through a single shooting component.

[0023] An example of the present invention is to provide a monitoring system and method, which can avoid the extra time loss required for the entire welding process by changing the welding quality monitoring time point and the welding fixture monitoring time point.

[0024] Technical Solution

[0025] In order to achieve the above-mentioned purpose, a foreign matter monitoring system for a welding fixture according to a preferred example of the present invention includes: a welding fixture, which pressurizes the welding object when the welding object is in a welding state; a photographing component, which photographs the welding fixture when the welding object is in a welding waiting state; a position adjustment component, which is coupled to the photographing component to adjust the position of the photographing component based on the position information of the welding fixture, thereby setting the photographing focus of the photographing component on the welding fixture; and a monitoring component, which receives the photographing information to monitor the state of the welding fixture.

[0026] In a preferred example of the present invention, the foreign matter monitoring system of the welding fixture also includes a control component, which calculates a shooting position correction value of an initial shooting position of the shooting component based on the position information of the welding fixture, and controls the operation of the position adjustment component so that the shooting component moves from the initial shooting position by the shooting position correction value, wherein the initial shooting position is a position where the shooting focus of the shooting component is set on the welding surface of the welding object.

[0027] In a preferred example of the present invention, when the welding object is in a welding waiting state, when the welding fixture moves from the welding surface position to the welding waiting position, the control component calculates a shooting position correction value by reflecting the waiting interval and the focal length of the shooting component, and the waiting interval is the interval between the welding surface position and the welding waiting position.

[0028] In a preferred example of the present invention, the position adjustment component adjusts the position of the shooting component from the initial shooting position to the correction shooting position so that the shooting component shoots the welding fixture placed at the welding waiting position from the correction shooting position, thereby providing shooting information to the monitoring component, wherein the correction shooting position is a position separated from the initial shooting position by a shooting position correction value, and the welding waiting position is a position separated from the welding surface of the welding object by a waiting interval.

[0029] In a preferred example of the present invention, the monitoring part receives the photographing information and displays it as a video image, thereby monitoring the accumulation state of foreign matter in the welding jig generated by welding of the welding object.

[0030] In a preferred example of the present invention, the foreign matter monitoring system for a welding jig further includes a jig lifting component coupled to the welding jig to adjust the position of the welding jig relative to a welding surface of the welding object.

[0031] In a preferred example of the present invention, the clamp lifting component is operated so that during the welding operation of the welding object, the welding clamp is lowered from the welding waiting position to the welding surface position to pressurize the welding object, and the operation is operated so that after the welding of the welding object is completed, the welding clamp is lifted from the welding surface position to the welding waiting position, wherein the welding surface position is the position of the welding surface of the welding object, and the welding waiting position is a position spaced apart in one direction on the welding surface of the welding object.

[0032] In a preferred example of the present invention, the foreign matter monitoring system for a welding jig further includes a welding component that irradiates a welding object with a welding beam along a welding line.

[0033] In a preferred example of the present invention, the welding jig is provided with a jig opening through which the welding beam passes, and the welding jig is placed on a welding surface of a welding object so that the jig opening is positioned in a welding region including a welding line.

[0034] In a preferred example of the present invention, the monitoring part receives photographing information of a welding jig including a jig opening to monitor a state in which foreign matter generated when a welding object is welded is accumulated in the jig opening.

[0035] The method for monitoring foreign matter in a welding jig according to a preferred example of the present invention may monitor an accumulation state of foreign matter in the welding jig using a foreign matter monitoring system for the welding jig.

[0036] In order to achieve the above-mentioned purpose, according to an example of the present invention, a welding system can be provided, including: a welding cover having an opening corresponding to a formed welding line and configured to surround a welding component and a welding line above a welding object when welding the welding object; a photographing component which photographs the welding line after welding is completed and photographs the periphery of the opening of the welding cover when waiting for welding; a focus adjustment component which is coupled to the photographing component to adjust the photographing focus of the photographing component when photographing the welding line and the welding cover; a cover lifting component which lowers the welding cover close to the welding object for welding and lifts the welding cover to be spaced apart from the welding object after welding is completed; and a monitoring component which monitors the welding state and the state of the welding cover through photographing information of the photographing component.

[0037] When the welding object is fixed by the welding cover, the welding cover can also be called a welding fixture.

[0038] Through this example, the welding quality and the state of the welding cap can be monitored. In particular, the welding monitoring image and the welding cap monitoring image can be obtained by the same shooting component without adding any shooting component.

[0039] Preferably, welding is performed at the welding surface position (h0) after the welding hood is completely lowered by the hood lifting member, and after the welding is completed, the welding line is photographed by the photographing member.

[0040] Preferably, after the photographing of the welding line is completed, the welding hood is lifted by the hood lifting member to prepare for new welding at the welding waiting position (h1).

[0041] During the welding preparation process, the finished welded objects can be removed for other processes and new welded objects can be introduced.

[0042] Preferably, the welding surface position and the welding waiting position are preset.

[0043] Preferably, after the welding cover is completely lifted by the cover lifting and lowering member, the welding cover is photographed by the photographing member.

[0044] Preferably, before the photographing component photographs, the focus is automatically adjusted by the focus adjusting component.

[0045] The focus set when photographing the welding line may be different from the focus set when photographing the welding hood. That is, the two focal points are different, so the focus needs to be adjusted to obtain a clear welding line image and a clear welding hood image.

[0046] For this purpose, the focus can be automatically adjusted in the focus adjustment component.

[0047] The focus adjustment component can be configured to adjust the focus by changing the position of the photographing component. That is, by changing the position of the photographing component when photographing the welding line and the position of the photographing component when photographing the welding cover, the best focus can be adjusted in any case.

[0048] The focus adjustment means may be arranged to change the position of the photographing means between an initial photographing position (h2) for photographing the welding line and a correction photographing position (h3) for photographing the welding cap.

[0049] Preferably, the operation of the cover lifting component and the operation of the focus adjustment component are performed simultaneously. More specifically, preferably, the operation of the focus adjustment component is performed and completed within the operation cycle of the cover lifting component. This means that no additional time is required to operate the focus adjustment component.

[0050] Therefore, the extra time required for focus adjustment between welding and soldering is unnecessary.

[0051] Preferably, the monitoring component is configured to display the photographed information as an image. Therefore, the monitoring operator can intuitively monitor the welding quality and the welding cap state, and monitor the welding quality and the welding cap state through image analysis.

[0052] Beneficial Effects

[0053] Through an example of the present invention, a foreign matter monitoring system for a welding fixture and a method for monitoring foreign matter in a welding fixture can be provided, which can focus a shooting component on the welding fixture based on the position information of the welding fixture to obtain shooting information of the welding fixture, thereby monitoring the accumulation state of foreign matter in the welding fixture through video.

[0054] According to an example of the present invention, a monitoring system and method can be provided, which can monitor the state of a welding fixture and the welding quality through a single photographing component.

[0055] Through an example of the present invention, a monitoring system and method can be provided, which can avoid the extra time loss required for the entire welding process by changing the welding quality monitoring time point and the welding fixture monitoring time point. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 and Figure 2 It is a view for explaining a welding process of a welding object of a welded part.

[0057] Figures 3 to 5 It is a view for explaining the problem that it is difficult to monitor the accumulation state of foreign matter in a welding jig by taking an image of a component in the conventional technology.

[0058] Figure 61 is a configuration diagram of a foreign matter monitoring system for a welding jig according to an example of the present invention.

[0059] Figure 7 4 is a structural diagram of a foreign matter monitoring system for a welding fixture according to an example of the present invention.

[0060] Figure 8 An operating state of a welding jig when welding parts are in a welding state in one example of the present invention is shown.

[0061] Fig. 9 An operating state of a welding jig and a position adjustment member when a welding member is in a welding waiting state in one example of the present invention is shown.

[0062] Fig.10 is an image acquired in a photographing component in one example of the present invention, Fig.11 Here is an actual photo of the welding jig when the parts were being photographed. DETAILED DESCRIPTION

[0063] While the present invention can be variously modified and can have various examples, specific examples will be shown and described in the drawings.

[0064] However, these are not intended to limit the present application to a specific embodiment, and should be understood to include all changes, equivalents and alternatives included in the essence and technical scope of the present application. When describing the present application, if it is determined that the detailed description of the relevant known technology may obscure the main purpose of the present application, its detailed description will be omitted.

[0065] Terms such as first or second may be used to describe various elements, but these elements should not be limited by these terms. These terms are only used to distinguish one element from another.

[0066] The terms used in the present application are only used to describe specific examples, and these examples are not intended to limit the present application. Unless the context clearly dictates otherwise, a singular expression includes a plural expression.

[0067] In the present application, it must be understood that terms such as “including” or “having” are intended to indicate the presence of features, numbers, steps, operations, elements, parts, or a combination thereof described in the specification, but do not preclude the presence or possibility of adding one or more other features, numbers, steps, operations, elements, parts, or a combination thereof.

[0068] Therefore, the construction shown in the example described in this specification is only the most preferred example of the present application, and does not represent the entire technical idea of ​​the present application, so various equivalents and modifications that can replace them may exist when the present application is filed.

[0069] Furthermore, in the present application, the drawings should be understood as being enlarged or reduced for the convenience of explanation.

[0070] Hereinafter, a foreign matter monitoring system for a welding fixture and a method for monitoring foreign matter in a welding fixture according to a preferred example of the present invention will be described with reference to the accompanying drawings. However, the accompanying drawings are illustrative, and the scope of the foreign matter monitoring system for a welding fixture and the method for monitoring foreign matter in a welding fixture of the present application is not limited by the accompanying drawings.

[0071] Reference Figures 6 to 9 The foreign body monitoring system 100 for a welding system or welding fixture includes a welding fixture 120, a fixture lifting component 125, a welding component 130, a photographing component 140, a position adjustment component 150, and a monitoring component 160. The monitoring system 100 may include a control component 170 that controls the photographing time point of the photographing component 140.

[0072] The control component 170 may be configured to control operations of the position adjustment component 150 and the clamp lifting component 125 .

[0073] Here, the welding jig 120 can perform the function of preventing welding foreign matter from splashing into the periphery by surrounding the welding part. Therefore, the welding jig 120 can be called a welding cover. In this case, the jig lifting member 125 can be called a cover lifting member.

[0074] In addition, the position adjustment component 150 may be provided to adjust the focus of the photographing component 140. Therefore, the position adjustment component 150 may be referred to as a focus adjustment component.

[0075] The welding jig 120 may be configured to apply pressure to the welding objects 111 and 112 when the welding objects 111 and 112 are welded to restrict movement of the welding objects 111 and 112. The position of the welding jig 120 is adjusted by the jig lifting member 125.

[0076] The welding jig 120 is positioned at the welding surface position h0 when the welding objects 111 and 112 are in a welding state. The welding jig 120 is positioned at the welding waiting position h1 when the welding objects 111 and 112 are in a welding waiting state. The welding waiting position h1 is a position spaced apart from the welding surfaces of the welding objects 111 and 112 by a waiting interval Δh1.

[0077] That is, the welding jig 120 is configured to be raised and lowered by the operation of the jig lifting part 125, wherein the raising time point can be controlled by the control part 170. When welding is completed, the welding objects 111, 112 are automatically transferred, and a new welding object is positioned below the welding jig 120 and the welding part 130. Thereafter, the welding jig 120 is lowered by the jig lifting part 125, whereby a new welding can be performed.

[0078] The welding jig 120 is provided with a jig opening 121 for passing the welding beam B. A jig lifting member is coupled to the welding jig 120 , whereby the welding jig 120 can be lowered toward the welding objects 111 , 112 in the arrow F1 direction or can be raised away from the welding objects 111 , 112 in the arrow F2 direction.

[0079] The jig opening 121 may be formed in various shapes according to a welding position or a welding line. For example, the jig opening 121 may be formed in a long slit shape in a width direction of the welding object.

[0080] The jig elevating member 125 may adjust the position of the welding jig 120 relative to the welding objects 111 , 112 according to the operating state of the welding member 130 .

[0081] The photographing member 140 is located above the welding objects 111 and 112 and the welding jig 120. The position adjusting member 150 may be coupled to the photographing member 140.

[0082] The position adjustment member 150 is a device coupled to the support member 155 to adjust the position of the photographing member 140. The position adjustment member 150 may adjust the photographing position of the photographing member 140 so that the focus is set on the photographing target of the photographing member 140.

[0083] The initial photographing position h2 is a position where the focus of the photographing member (140) is set on the welding surface of the welding objects 111 and 112. Therefore, in order to photograph the welding fixture 120 located at the welding waiting position h1, the photographing position of the photographing member 140 must be moved from the initial photographing position h2 to the correction photographing position h3. The correction photographing position h3 is a position where the focus of the photographing member 140 is set on the welding fixture 120 located at the welding waiting position h1.

[0084] When the welding object is in a welding waiting state, when the welding fixture 120 moves from the welding surface position h0 to the welding waiting position h1, the control component 170 can calculate the shooting position correction value Δh2 by reflecting the waiting interval Δh1 and the focal length of the shooting component 140, and the waiting interval Δh1 is the interval between the welding surface position h0 and the welding waiting position h1.

[0085] The control part 170 calculates the photographing position correction value Δh2 in consideration of the waiting interval Δh1. Here, the waiting interval Δh1 is the interval between the welding surface position h0 and the welding waiting position h1. The photographing position correction value Δh2 is the interval between the initial photographing position h2 and the corrected photographing position h3.

[0086] When the control part 170 calculates the photographing position correction value Δh2, the control part 170 controls the operation of the position adjustment part 150 so that the photographing part 140 moves from the initial photographing position h2 by the photographing position correction value Δh2. Therefore, the photographing part 140 is positioned to be spaced apart from the welding jig 120 at the welding waiting position h1 by a focal length.

[0087] When the photographing part 140 is located at the correction photographing position h3, it can photograph the welding jig 120 located at the welding waiting position h1.

[0088] At the correction photographing position h3, the photographing part 140 is focused on the welding jig 120, whereby the photographing part 140 can secure the image of the welding jig 120. The photographing part 140 can provide the photographed image of the welding jig 120 to the monitoring part 160.

[0089] Meanwhile, the problem of automatically adjusting the focus by calculating the shooting position correction value may be very complicated or difficult. When the distance variation width between the object and the shooting component is preset and when a very precise focus adjustment is unnecessary, a preset focus adjustment may be performed. This focus adjustment may also be performed simply by changing the position of the shooting component.

[0090] The monitoring part 160 receives the photographing information and displays it as an image. The operator can monitor the accumulation or accumulation state of the foreign matter 114 of the welding fixture 120 caused by the welding of the welding objects 111, 112 through the image displayed on the monitoring part 160. In particular, it can be monitored whether the opening is blocked by foreign matter. Of course, the welding quality and the fixture state can be automatically monitored by the image analysis program.

[0091] The monitoring part 160 receives photographing information of the welding jig 120 including the jig opening 121 to monitor a state in which foreign matter 114 generated when the welding objects 111 , 112 are welded is accumulated in the jig opening 121 .

[0092] The present invention can focus the photographing component 140 on the welding fixture 120 based on the position information of the welding fixture 120 to obtain the photographing information of the welding fixture 120, so as to monitor the accumulation state of the foreign matter 114 in the welding fixture 120 through video.

[0093] In the following, reference Figure 8 and Fig. 9 , the operation of the foreign matter monitoring system 100 according to the welding jig, the positions of the welding jig 120 and the photographing member 140 will be described in more detail.

[0094] The welding jig 120 is placed on the welding surfaces of the welding objects 111 and 112 so that the jig opening 121 is positioned in the welding area including the welding line L. In this case, the welding jig 120 presses the welding objects 111 and 112 at the welding surface position h0. In this example, the welding objects 111 and 112 are respectively referred to as the first welding object 111 and the second welding object 112.

[0095] The welding part 130 irradiates the welding objects 111 and 112 with the welding beam B along the welding line L. The welding part 130 is a device that irradiates the welding objects 111 and 112 with the welding beam B. If the welding part 130 is a device capable of welding the welding objects 111 and 112, various types of known welding devices may be used.

[0096] The welding beam B passes through the jig opening 121 to irradiate a welding line of the welding objects 111 and 112. The welding line is a connection line between the first welding object 111 and the second welding object 112. When the welding beam B irradiates the first welding object 111 and the second welding object 112 along the welding line, the first welding object 111 is connected to the second welding object 112.

[0097] When the welding of the welding part 130 is completed, as shown in FIG. Fig. 9 As shown, the welding jig 120 moves to the welding waiting position h1. When the welding jig 120 is raised from the welding surface position h0 to the welding waiting position h1 by the jig lifting member 125 (F2), the welding jig 120 is separated from the first welding object 111 and the second welding object 112.

[0098] When the welding jig 120 moves to the waiting position, the photographing member 140 moves to focus on the welding jig 120 through the position adjustment member 150. That is, the photographing member 140 is positioned to be spaced apart from the welding jig 120 by a focal length.

[0099] The position adjustment part 150 adjusts the position of the photographing part 140 based on the position information of the welding jig 120 so that the photographing part 140 is spaced apart from the welding jig 120 by a focal length. Therefore, the photographing part 140 moves from the initial photographing position h2 to the correction photographing position h3.

[0100] Reference Fig.10 and Fig.11 Since the focus of the photographing part 140 is set on the welding jig 120, the accumulation state of foreign matter on the welding jig 120 can be accurately inspected. Fig.10 is an image acquired by the photographing component 140 in one example of the present invention, Fig.11 This is an actual photo of the welding jig 120 when the component 140 is photographed.

[0101] The operator may check the accumulation state of the foreign matter 114 on the welding jig 120 through the acquired image of the welding jig 120 displayed on the monitoring part 160 during the welding waiting time.

[0102] Therefore, the operator can determine the accumulation state of the foreign matter 114 in the welding jig 120 through the image of the welding jig 120 without physically inspecting the welding jig 120, thereby easily determining whether the foreign matter 114 of the welding jig 120 has been cleaned.

[0103] Hereinafter, the present invention will be described in detail by way of examples. However, the scope of the present invention is not limited by the following examples. The preferred examples of the present invention as described above are disclosed for illustrative purposes, and those skilled in the art with common knowledge of the present invention can make various modifications, changes and additions within the spirit and scope of the present invention, and these modifications, changes and additions should be considered to fall within the scope of the following claims.

[0104] Industrial Applicability

[0105] Industrial applicability is described in the detailed description of the present invention.

Claims

1. A foreign body monitoring system for a welding fixture, comprising: A welding fixture that pressurizes the welding object when the welding object is in a welding state; A photographing component for photographing the welding fixture when the welding object is in a welding waiting state; a position adjustment component coupled to the photographing component to adjust the position of the photographing component based on the position information of the welding fixture, thereby setting the photographing focus of the photographing component on the welding fixture; as well as A monitoring component receives the photographing information to monitor the state of the welding fixture.

2. The foreign matter monitoring system for a welding fixture according to claim 1, further comprising: a control component that calculates a photographing position correction value of an initial photographing position of the photographing component based on the position information of the welding jig, and controls the operation of the position adjustment component so that the photographing component moves the photographing position correction value from the initial photographing position, The initial photographing position is a position where the photographing focus of the photographing component is set on the welding surface of the welding object.

3. The foreign matter monitoring system for welding fixture according to claim 2, wherein: When the welding object is in a welding waiting state, when the welding fixture moves from the welding surface position to the welding waiting position, the control component calculates the shooting position correction value by reflecting the waiting interval and the focal length of the shooting component, and the waiting interval is the interval between the welding surface position and the welding waiting position.

4. The foreign matter monitoring system for welding fixture according to claim 2, wherein: The position adjustment component adjusts the position of the photographing component from the initial photographing position to the correction photographing position, so that the photographing component photographs the welding fixture placed at the welding waiting position from the correction photographing position, and provides the photographing information to the monitoring component. The correction shooting position is a position spaced apart from the initial shooting position by the shooting position correction value, The welding waiting position is a position spaced apart from the welding surface of the welding object by a waiting interval.

5. The foreign matter monitoring system for welding fixture according to claim 4, wherein: The monitoring part receives the photographing information and displays the photographing information as a video image, thereby monitoring an accumulation state of foreign matter in the welding jig generated by welding of the welding object.

6. The foreign matter monitoring system for a welding fixture according to claim 1, further comprising: A jig lifting member is coupled to the welding jig to adjust a position of the welding jig relative to the welding surface of the welding object.

7. The foreign matter monitoring system for a welding fixture according to claim 6, wherein: The clamp lifting component operates so that: During the welding operation of the welding object, the welding fixture is lowered from the welding waiting position to the welding surface position to pressurize the welding object, After the welding of the welding object is completed, the welding fixture is lifted from the welding surface position to the welding waiting position, The welding surface position is a position of the welding surface of the welding object, and the welding waiting position is a position spaced apart in one direction of the welding surface of the welding object.

8. The foreign matter monitoring system for a welding fixture according to claim 1, further comprising: The welding parts are irradiated with a welding beam along a welding line.

9. The foreign matter monitoring system for a welding fixture according to claim 8, wherein: The welding fixture is provided with a fixture opening for the welding beam to pass through, The welding jig is placed on the welding surface of the welding object so that the jig opening is located in a welding region including the welding line.

10. The foreign matter monitoring system for welding fixture according to claim 9, wherein: The monitoring part receives photographing information of the welding jig including the jig opening to monitor a state in which foreign matter generated when the welding object is welded is accumulated in the jig opening.

11. A welding system comprising: a welding hood having an opening corresponding to the formed welding line and arranged to surround a welding part above the welding object and the welding line when welding the welding object; A photographing component, which photographs the welding line after welding is completed, and photographs the periphery of the opening of the welding cover when waiting for welding; a focus adjustment component coupled to the photographing component to adjust a photographing focus of the photographing component when photographing the welding line and the welding cover; a hood lifting member that lowers the welding hood close to the welding object to perform welding, and lifts the welding hood to be spaced apart from the welding object after welding is completed; and A monitoring component monitors the welding state and the state of the welding cover through the photographing information of the photographing component.

12. The welding system according to claim 11, wherein: After the welding hood is completely lowered by the hood lifting and lowering means, welding is performed at the welding surface position (h0), and after welding is completed, the welding line is photographed by the photographing means.

13. The welding system according to claim 12, wherein: After the photographing of the welding line is completed, the welding cover is lifted by the cover lifting member to prepare for new welding at the welding waiting position (h1).

14. The welding system according to claim 13, wherein: The welding surface position and the welding waiting position are preset.

15. The welding system according to claim 13, wherein: After the welding cover is completely lifted by the cover lifting component, the welding cover is photographed by the photographing component.

16. The welding system of claim 15, wherein: Before photographing by the photographing component, the photographing focus is automatically adjusted by the focus adjusting component.

17. The welding system of claim 16, wherein: The focus adjustment component is configured to adjust the photographing focus by changing the position of the photographing component.

18. The welding system of claim 17, wherein: The focus adjustment means is configured to change the position of the photographing means between an initial photographing position (h2) for photographing the weld line and a corrected photographing position (h3) for photographing the weld cap.

19. The welding system of claim 18, wherein: The operation of the cover lifting and lowering member and the operation of the focus adjusting member are performed simultaneously.

20. The welding system of claim 11, wherein: The monitoring component is configured to display the photographing information as an image.

Images