Welding device

Abstract

The utility model provides a kind of welding device, comprising: base frame;Positioning structure is set on base frame, to install welded piece;Welding structure is located above positioning structure, and welding structure includes connecting frame and the welding head being set on connecting frame, and connecting frame is movably set on base frame along vertical direction;First driving part, first driving part and connecting frame driving cooperation;Detection structure is set on connecting frame and is located above positioning structure, and detection structure includes first photoelectric sensor and second photoelectric sensor, and first photoelectric sensor and second photoelectric sensor are all inclined to set, and the distance between first photoelectric sensor and second photoelectric sensor gradually reduces along the direction of the top end to bottom end of base frame;Controller, controller is signal connected with detection structure and first driving part.The technical scheme of the application effectively solves the problem that the welding device in the related art has a high probability of causing injury to the operator's hand when welding.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, and more specifically, to a welding apparatus. Background Technology

[0002] As a key piece of equipment in industrial production, the press is widely used in many fields, including but not limited to plastic welding and metal parts forming. Specifically, the press can join two or more layers of materials together.

[0003] In existing technology, when using a pressing machine, the operator manually feeds the materials and steps on a control panel, which then allows the welding head to weld different materials. However, during operation, both feeding and stepping on the control panel require manual operation, which can easily result in the operator's hand being below the welding head while the welding head continues to move towards the positioning structure. This could lead to the operator's hand being pinched or injured by the welding head and the positioning structure. Utility Model Content

[0004] The main objective of this invention is to provide a welding device that addresses the problem that welding devices in related technologies have a high probability of causing injury to the operator's hands during welding.

[0005] To achieve the above objectives, according to one aspect of the present invention, a welding apparatus is provided, comprising: a base frame; a positioning structure disposed on the base frame for mounting the workpiece to be welded; a welding structure located above the positioning structure, the welding structure including a connecting frame and a welding head disposed on the connecting frame, the connecting frame being movably disposed on the base frame in a vertical direction; a first driving member, the first driving member drivingly cooperating with the connecting frame; a detection structure disposed on the connecting frame and located above the positioning structure, the detection structure including a first photoelectric sensor and a second photoelectric sensor, both the first photoelectric sensor and the second photoelectric sensor being inclined, the distance between the first photoelectric sensor and the second photoelectric sensor gradually decreasing along the direction from the top end to the bottom end of the base frame; and a controller, the controller being signal-connected to the detection structure and the first driving member.

[0006] Furthermore, the light-emitting surface of the first photoelectric sensor and / or the light-emitting surface of the second photoelectric sensor are strip-shaped.

[0007] Furthermore, the positioning structure includes a positioning ring, and the side of the welding head facing the positioning ring is arc-shaped.

[0008] Furthermore, the base frame includes a base and a column mounted on the base, a welded structure is mounted on the column, and the positioning structure also includes a mounting plate mounted on the base. The mounting plate is located at the end of the positioning ring facing the column, and the mounting plate protrudes from the positioning ring in the radial direction of the positioning ring.

[0009] Furthermore, the positioning structure also includes a support base mounted on the base frame, and the mounting plate is detachably mounted on the support base.

[0010] Furthermore, the welding device also includes a first indicator and a second indicator disposed on the outer periphery of the top of the mounting plate, the distance between the first indicator and the second indicator being less than or equal to the width of the welding head.

[0011] Furthermore, the welding device also includes an alarm structure, the controller is signal-connected to the alarm structure, and the alarm structure is capable of emitting an alarm sound and / or an alarm light.

[0012] Furthermore, the welding head is an ultrasonic welding head.

[0013] Furthermore, the detection structure also includes a fixed frame, a second driving member, a first connecting member, and a second connecting member. The fixed frame is mounted on the connecting frame, the first photoelectric sensor is mounted on the first connecting member, and the second photoelectric sensor is mounted on the second connecting member. Both the first and second connecting members are movably mounted on the fixed frame in the lateral direction, and both the first and second connecting members are guided and engaged with the fixed frame. The second driving member is driven and engaged with both the first and second connecting members to bring the first and second connecting members closer to or further away from each other.

[0014] Furthermore, the detection structure also includes a third driving component, which drives the fixed frame to move along the vertical direction on the connecting frame, and the fixed frame and the connecting frame are guided together.

[0015] The welding device, employing the technical solution of this utility model, includes a base frame, a positioning structure, a welding structure, a first driving component, a detection structure, and a controller. The positioning structure positions the workpiece to be welded, facilitating welding by the welding head. The controller controls the operation of the first driving component, which in turn moves the connecting frame vertically along the base frame. The connecting frame then moves the welding head towards or away from the positioning structure. A first photoelectric sensor and a second photoelectric sensor detect whether the operator's hand is directly below the welding head. When the first and second photoelectric sensors detect that the operator's hand is within the vertical space where the welding head contacts the workpiece, the controller stops the first driving component, thus stopping the downward movement of the connecting frame and the welding head. The first and second photoelectric sensors are tilted, allowing most of the light emitted from them to reach the operator's hand, thus enabling more effective monitoring and preventing injury from the welding head and positioning structure. Therefore, the technical solution of this application effectively solves the problem that the welding head of the welding device in the related technology has a high probability of causing injury to the operator's hand during welding. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 A perspective structural schematic diagram of an embodiment of the welding apparatus according to the present invention is shown;

[0018] Figure 2 It shows Figure 1 A partially enlarged schematic diagram of point A of the welding device;

[0019] Figure 3 It shows Figure 1 A three-dimensional structural diagram of the welding device from another perspective;

[0020] Figure 4 It shows Figure 3 A partially enlarged schematic diagram of point B of the welding device;

[0021] Figure 5 It shows Figure 1 A three-dimensional structural diagram of the welding device from another perspective;

[0022] Figure 6 It shows Figure 3 A magnified schematic diagram of part C of the welding device.

[0023] The above figures include the following reference numerals:

[0024] 10. Base frame; 11. Base; 12. Column; 20. Positioning structure; 21. Positioning ring; 22. Mounting plate; 23. Support base; 30. Welding structure; 31. Connecting frame; 32. Welding head; 40. Detection structure; 41. First photoelectric sensor; 42. Second photoelectric sensor; 43. Fixing frame; 431. Frame body; 432. Third block; 44. Second driving component; 45. First connecting component; 46. Second connecting component; 47. Third driving component; 50. First indicating part; 60. Second indicating part. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0026] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0027] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0028] like Figure 1 , Figure 2 as well as Figure 4As shown, the welding apparatus of this embodiment includes: a base frame 10, a positioning structure 20, a welding structure 30, a detection structure 40, and a controller. The positioning structure 20 is disposed on the base frame 10 for mounting the workpiece to be welded. The welding structure 30 is located above the positioning structure 20 and includes a connecting frame 31 and a welding head 32 disposed on the connecting frame 31. The connecting frame 31 is movably disposed on the base frame 10 in a vertical direction. A first driving member is also present, drivingly engaging with the connecting frame 31. The detection structure 40 is disposed on the connecting frame 31 and located above the positioning structure 20. The detection structure 40 includes a first photoelectric sensor 41 and a second photoelectric sensor 42, both of which are inclined. The distance between the first photoelectric sensor 41 and the second photoelectric sensor 42 gradually decreases from the top to the bottom of the base frame 10. The controller is signal-connected to the detection structure 40 and the first driving member.

[0029] The welding device, employing the technical solution of this utility model, includes a base frame 10, a positioning structure 20, a welding structure 30, a first driving component, a detection structure 40, and a controller. The positioning structure 20 positions the workpiece to be welded, facilitating welding of the workpiece by the welding head 32. The controller controls the operation of the first driving component, which in turn drives the connecting frame 31 to move vertically along the base frame 10. The connecting frame 31 then drives the welding head 32 to move towards or away from the positioning structure 20. A first photoelectric sensor 41 and a second photoelectric sensor 42 detect whether the operator's hand is directly below the welding head 32. When the first photoelectric sensor 41 and the second photoelectric sensor 42 detect that the operator's hand is located within the vertical space of the area of ​​the welding head 32 that contacts the workpiece, the controller stops the first driving component, thereby stopping the downward movement of the connecting frame 31 and the welding head 32. The first photoelectric sensor 41 and the second photoelectric sensor 42 are tilted, allowing most of the light emitted from them to reach the operator's hand. This enables the first and second photoelectric sensors 41 and 42 to more effectively monitor the operator's hand, preventing injury from the welding head 32 and the positioning structure 20. Therefore, the technical solution of this application effectively solves the problem of the high probability of injury to the operator's hand from the welding head during welding in related technologies.

[0030] It should be noted that the first photoelectric sensor 41 and the second photoelectric sensor 42 are inclined. Compared to when the first photoelectric sensor 41 and the second photoelectric sensor 42 are upright, the light emitted by the first photoelectric sensor 41 and the second photoelectric sensor 42 can cover a larger area. That is, the light emitted by the first photoelectric sensor 41 and the second photoelectric sensor 42 can illuminate the area where the welding head contacts the workpiece, thus more effectively detecting the operator's hand and reducing the probability of the operator's hand being pinched. The first driving component can be a drive motor.

[0031] The vertical space where the welding head 32 contacts the workpiece refers to the space formed by stretching the maximum outline of the area where the welding head 32 contacts the workpiece in the vertical direction.

[0032] The vertical direction refers to the height direction of the base frame 10. The welding device in this embodiment is an ultrasonic welding press.

[0033] like Figure 1 and Figure 6 As shown, in this embodiment, the light-emitting surface of the first photoelectric sensor 41 and the light-emitting surface of the second photoelectric sensor 42 are strip-shaped. This arrangement allows the light emitted by the first photoelectric sensor 41 and the second photoelectric sensor 42 to cover a larger area, thereby enabling the first photoelectric sensor 41 and the second photoelectric sensor 42 to more effectively detect the operator's hand and reduce the probability of the operator's hand being pinched by the welding head 32 and the positioning structure 20.

[0034] It should be noted that the light-emitting surface of the first photoelectric sensor 41 and the light-emitting surface of the second photoelectric sensor 42 are strip-shaped, indicating that the length of the light-emitting surface is m times the width of the light-emitting surface, where m is a number greater than or equal to 2 and less than or equal to 4.

[0035] like Figure 2 and Figure 4 As shown, in this embodiment, the positioning structure 20 includes a positioning ring 21, and the side of the welding head 32 facing the positioning ring 21 is arc-shaped. The positioning ring 21 can effectively position the workpiece to be welded, facilitating the welding head 32 to weld the workpiece. The arc-shaped side of the welding head 32 facing the positioning ring 21 allows the shape of the welding head 32 to match the shape of the positioning ring 21, facilitating the welding head 32 to weld the workpiece.

[0036] It should be noted that the inclined arrangement of the first photoelectric sensor 41 and the second photoelectric sensor 42 increases the coverage area of ​​the light emitted by the first photoelectric sensor 41 and the second photoelectric sensor 42. Consequently, the light emitted by the first photoelectric sensor 41 and the second photoelectric sensor 42 can completely illuminate the area where the welding head 32 and the workpiece meet along the outer surface of the positioning ring 21. Compared to the first photoelectric sensor 41 and the second photoelectric sensor 42 being upright, this solves the problem of the small coverage area of ​​the light emitted by the first photoelectric sensor 41 and the second photoelectric sensor 42 when the outer surface of the positioning ring is circular and the first photoelectric sensor 41 and the second photoelectric sensor 42 are upright.

[0037] like Figure 3 As shown, in this embodiment, the base frame 10 includes a base 11 and a column 12 disposed on the base 11. The welding structure 30 is disposed on the column 12. The positioning structure 20 also includes a mounting plate 22 disposed on the base 11. The mounting plate 22 is disposed at the end of the positioning ring 21 facing the column 12, and the mounting plate 22 protrudes from the positioning ring 21 in the radial direction. The base 11 can support the column 12 and the positioning structure 20. The column 12 can support the welding structure 30. The mounting plate 22 can support the positioning ring 21. The mounting plate 22 protrudes from the positioning ring 21 in the radial direction, so that after the welded part is fitted onto the outer periphery of the positioning ring 21, the mounting plate 22 can stop the end of the welded part, facilitating the welding head 32 to weld the welded part.

[0038] like Figure 3 As shown, in this embodiment, the positioning structure 20 further includes a support base 23 disposed on the base frame 10, and the mounting plate 22 is detachably disposed on the support base 23. The support base 23 can support the mounting plate 22. The mounting plate 22 is detachably disposed, so that the positioning ring 21 can be replaced with different diameters to accommodate the welding of welded parts of different sizes.

[0039] like Figures 4 to 6 As shown, in this embodiment, the welding device further includes a first indicator 50 and a second indicator 60 disposed on the outer periphery of the top of the mounting plate 22. The distance between the first indicator 50 and the second indicator 60 is equal to the width of the welding head 32. The first indicator 50 and the second indicator 60 can indicate the area to be welded, facilitating the rotation of the welded part on the positioning ring 21 after welding a certain area of ​​the welded part. The area adjacent to the welded area can be moved between the first indicator 50 and the second indicator 60, facilitating re-welding by the welding head. In other embodiments, the distance between the first indicator 50 and the second indicator 60 is less than the width of the welding head 32. The above arrangement facilitates the operator to completely weld around the circumference of the welded part, avoiding omissions of some areas, that is, avoiding unwelded areas.

[0040] like Figure 1 As shown, in this embodiment, the welding device also includes an alarm structure. The controller is signal-connected to the alarm structure, which can emit an alarm sound and an alarm light. By emitting an alarm sound and an alarm light, the operator can easily determine whether one circumference of the workpiece has been completely welded. Specifically, when the welding head 32 runs a preset number of times, the alarm structure emits an alarm sound and an alarm light.

[0041] The number of times the welding head 32 runs refers to the number of times the welding head welds a single workpiece. The alarm structure includes a light fixture and a sound generator; the light fixture emits light, and the sound generator emits sound to provide an alert.

[0042] Specifically, the line connecting the center of the first indicator 50 and the center of the positioning ring 21 is a first straight line, and the line connecting the center of the second indicator 60 and the center of the positioning ring 21 is a second straight line. The angle between the first and second straight lines is a preset angle α. The preset number of times is n, where n = 360 / α.

[0043] In this embodiment, the preset included angle α is 60°.

[0044] It should be noted that after the welding head 32 welds the workpiece once, the controller controls the alarm structure to emit an alarm sound and an alarm light, and the counter records the number of times the welding head has welded.

[0045] like Figure 1 As shown, in this embodiment, the welding head 32 is an ultrasonic welding head. Ultrasonic waves can heat the workpiece to be welded, thereby welding the workpiece.

[0046] Specifically, the components to be welded include a cloth bag and a mouth support ring, the mouth support ring being supported at the opening of the cloth bag. The welding head welds the cloth bag and the mouth support ring together.

[0047] like Figure 2 , Figure 4 as well as Figure 6As shown, in this embodiment, the detection structure 40 further includes a fixed frame 43, a second driving member 44, a first connecting member 45, and a second connecting member 46. The fixed frame 43 is disposed on the connecting frame 31, the first photoelectric sensor 41 is disposed on the first connecting member 45, and the second photoelectric sensor 42 is disposed on the second connecting member 46. The first connecting member 45 and the second connecting member 46 are both movably disposed on the fixed frame 43 in the lateral direction, and the first connecting member 45 and the second connecting member 46 are both guided and engaged with the fixed frame 43. The second driving member 44 is driven and engaged with both the first connecting member 45 and the second connecting member 46, so that the first connecting member 45 and the second connecting member 46 move closer to each other or further away from each other. The second driving member 44 can drive the first connecting member 45 and the second connecting member 46 to move on the fixed frame 43, so that the first connecting member 45 and the second connecting member 46 can move closer to each other or further away from each other, so that the first photoelectric sensor 41 and the second photoelectric sensor 42 can move closer to each other or further away from each other, so that the distance between the first photoelectric sensor 41 and the second photoelectric sensor 42 can be adjusted according to the diameter of the welded part, so as to achieve more effective detection of the operator's hand and make the welding device more versatile.

[0048] It should be noted that when adjusting the distance between the first photoelectric sensor 41 and the second photoelectric sensor 42 according to the diameter of the part being welded, it is also necessary to replace the positioning ring 21 with one of the corresponding diameters according to the diameter of the part being welded.

[0049] like Figure 2 As shown, in this embodiment, the detection structure 40 further includes a third driving member 47, which drives the fixing frame 43 to move vertically on the connecting frame 31, and the fixing frame 43 guides the connecting frame 31. The third driving member 47 can drive the fixing frame 43 to move vertically on the connecting frame 31, and the fixing frame 43 can drive the first photoelectric sensor 41 and the second photoelectric sensor 42 to move relative to the positioning ring 21, so that the distance between the first photoelectric sensor 41 and the second photoelectric sensor 42 and the positioning ring 21 in the vertical direction can be changed, thereby adapting to welded parts of different diameters and making the welding device more versatile.

[0050] It should be noted that the fixing frame 43 includes a frame body 431, on which an installation space is provided. The first connecting member 45 and the second connecting member 46 are both disposed within the installation space, and a portion of the structure of the second driving member 44 is rotatably located within the installation space. The second driving member 44 is rotatably mounted on the frame body 431, and both the second driving member 44 and the first connecting member 45 and the second connecting member 46 are threadedly engaged. The side of the first connecting member 45 facing the column 12 and the side of the second connecting member 46 facing the column 12 are both guided by the connecting frame 31.

[0051] The first connector 45 includes a first block, and the second connector 46 includes a second block. The first block is provided with a first threaded hole, and the second block is provided with a second threaded hole. The second driving member 44 is a first driving screw, which passes through the first threaded hole and the second threaded hole.

[0052] The fixing frame 43 also includes a third block 432, which is disposed on the side of the frame 431 facing the column 12, and the side of the third block 432 facing the connecting frame 31 is guided and engaged with the connecting frame 31. The third driving member 47 is a second driving screw, which passes through the third threaded hole and is rotatably mounted on the connecting frame 31.

[0053] Specifically, the first drive screw can only rotate on the frame 431 and cannot move along its own axis on the frame 431. The second drive screw can only rotate on the connecting frame 31 and cannot move along its own axis on the connecting frame 31.

[0054] In other embodiments, the second drive member 44 and the third drive member 47 can be hydraulic cylinders or pneumatic cylinders, or of course, electric actuators.

[0055] In the description of this utility model, it should be understood that "multiple" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0056] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0057] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0058] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A welding apparatus, characterized in that, include: Base frame (10); A positioning structure (20) is provided on the base frame (10) for mounting the welded parts; A welding structure (30) is located above the positioning structure (20). The welding structure (30) includes a connecting frame (31) and a welding head (32) disposed on the connecting frame (31). The connecting frame (31) is movably disposed on the base frame (10) in the vertical direction. The first driving component is driven to cooperate with the connecting frame (31); A detection structure (40) is disposed on the connecting frame (31) and located above the positioning structure (20). The detection structure (40) includes a first photoelectric sensor (41) and a second photoelectric sensor (42). The first photoelectric sensor (41) and the second photoelectric sensor (42) are both inclined. The distance between the first photoelectric sensor (41) and the second photoelectric sensor (42) gradually decreases along the direction from the top end to the bottom end of the base frame (10). The controller is signal-connected to the detection structure (40) and the first drive element.

2. The welding apparatus according to claim 1, characterized in that, The light-emitting surface of the first photoelectric sensor (41) and / or the light-emitting surface of the second photoelectric sensor (42) are strip-shaped.

3. The welding apparatus according to claim 1, characterized in that, The positioning structure (20) includes a positioning ring (21), and the side of the welding head (32) facing the positioning ring (21) is arc-shaped.

4. The welding apparatus according to claim 3, characterized in that, The base frame (10) includes a base (11) and a column (12) disposed on the base (11). The welding structure (30) is disposed on the column (12). The positioning structure (20) also includes a mounting plate (22) disposed on the base (11). The mounting plate (22) is disposed at one end of the positioning ring (21) facing the column (12). The mounting plate (22) protrudes from the positioning ring (21) in the radial direction.

5. The welding apparatus according to claim 4, characterized in that, The positioning structure (20) further includes a support base (23) disposed on the base frame (10), and the mounting plate (22) is detachably disposed on the support base (23).

6. The welding apparatus according to claim 4, characterized in that, The welding device further includes a first indicator (50) and a second indicator (60) disposed on the outer periphery of the top of the mounting plate (22), wherein the distance between the first indicator (50) and the second indicator (60) is less than or equal to the width of the welding head (32).

7. The welding apparatus according to any one of claims 1 to 6, characterized in that, The welding device also includes an alarm structure, and the controller is signal-connected to the alarm structure, which is capable of emitting an alarm sound and / or an alarm light.

8. The welding apparatus according to any one of claims 1 to 6, characterized in that, The welding head (32) is an ultrasonic welding head.

9. The welding apparatus according to any one of claims 1 to 6, characterized in that, The detection structure (40) further includes a fixed frame (43), a second driving member (44), a first connecting member (45), and a second connecting member (46). The fixed frame (43) is disposed on the connecting frame (31). The first photoelectric sensor (41) is disposed on the first connecting member (45). The second photoelectric sensor (42) is disposed on the second connecting member (46). The first connecting member (45) and the second connecting member (46) are both movably disposed on the fixed frame (43) in the lateral direction. The first connecting member (45) and the second connecting member (46) are both guided and engaged with the fixed frame (43). The second driving member (44) is driven and engaged with the first connecting member (45) and the second connecting member (46) so that the first connecting member (45) and the second connecting member (46) move closer to each other or further away from each other.

10. The welding apparatus according to claim 9, characterized in that, The detection structure (40) further includes a third driving member (47), which drives the fixing frame (43) to move along the vertical direction on the connecting frame (31), and the fixing frame (43) guides the connecting frame (31).

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