A positioning clamping device for welding protective doors

Abstract

The present invention discloses a positioning and clamping device for welding a protective door, which relates to the technical field of protective door welding, and comprises a processing platform and a positioning platform, a splint which is slidably provided in the positioning platform, one end of a negative pressure air bag being fixedly connected to the positioning platform, a docking air chamber which is communicated with the negative pressure air bag being provided in the splint, a port which is communicated with the docking air chamber being provided on the splint, a sealing sheet being provided on the outside of the port, a movable plate being provided on the splint, and a negative pressure port being provided on the movable plate; in the present invention, the present invention comprises a processing platform and a positioning platform, a splint which is slidably provided in the positioning platform, one end of a negative pressure air bag being fixedly connected to the positioning platform, a docking air chamber which is communicated with the negative pressure air bag being provided in the splint, a port which is communicated with the docking air chamber being provided on the splint, a sealing sheet being provided on the outside of the port, a movable plate being provided on the splint, and a negative pressure port being provided on the movable plate.

Description

Technical Field

[0001] The invention relates to the technical field of protective door welding, in particular to a positioning and clamping device for protective door welding. Background Art

[0002] In the production and manufacturing process of protective doors, welding technology is a key link to ensure the quality and performance of protective doors.

[0003] Existing positioning devices often rely on mechanical structures to achieve clamping. When faced with smooth protective door components, the mechanical clamping components have difficulty effectively engaging with the smooth surface, resulting in insufficient friction and a high risk of sliding during welding.

[0004] For components with uneven center of gravity distribution, the mechanical clamping force cannot accurately adapt to the center of gravity characteristics. Under the action of gravity, the components are prone to unstable conditions such as tilting and flipping, which seriously affects the welding accuracy and causes defects such as weld deviation and insufficient welding strength, greatly reducing the quality and reliability of the protective door.

[0005] Although some positioning devices have introduced a negative pressure adsorption system as an auxiliary fixation method, this system has obvious defects.

[0006] The adsorption force is usually fixed and cannot be flexibly adjusted according to the actual conditions such as the material, surface characteristics, size and center of gravity distribution of the component.

[0007] For small, thin, and smooth components, excessive fixed adsorption force may cause component deformation; while for large components with complex center of gravity, the fixed adsorption force is not enough to overcome their gravity and inertia, and stable adsorption and fixation cannot be achieved, making it difficult to meet the welding needs of diverse protective door components.

[0008] In view of this, this application is hereby filed. Summary of the Invention

[0009] The object of the present invention is to provide a positioning and clamping device for welding a protective door to solve the problems raised in the above background technology.

[0010] In order to solve the above technical problems, the present invention provides a positioning and clamping device for welding a protective door, comprising a processing platform and a positioning table, a splint slidably provided in the positioning table, one end of a negative pressure airbag fixedly connected to the positioning table, a docking air chamber connected to the negative pressure airbag provided in the splint, a port connected to the docking air chamber provided on the splint, a sealing sheet provided on the outside of the port, a movable plate provided on the splint, a negative pressure port provided on the movable plate, the movable plate is sealed with the port, a push rod slidably connected to the splint is provided on the movable plate, a spring is provided between the splint and the movable plate, an opening airbag whose position coincides with the push rod is provided in the splint, the opening airbag is connected to a connecting air path, and the connecting air path is connected to an opening rod whose position coincides with the port.

[0011] Furthermore, the bottom surface of the positioning platform is connected to a base, the top surface of the base is provided with a rotating motor, the output shaft of the rotating motor is connected to a rotating plate, the top surface of the positioning platform is provided with a vertical groove, the rotating plate is provided with an oblique groove staggered with the vertical groove, the bottom surface of the splint is provided with a vertical slider slidably connected to the vertical groove, and the bottom surface of the vertical slider is connected to an oblique column slidably connected to the oblique groove.

[0012] Furthermore, a connecting air hole is provided on the vertical slider, a connecting air pipe is provided on the top surface of the vertical slider, a docking air hole is provided in the docking air chamber, and the other end of the connecting air pipe is connected to the docking air hole.

[0013] Furthermore, there are four of the vertical grooves, the oblique grooves and the negative pressure airbags arranged in a circular array.

[0014] Furthermore, a connecting port is provided on the front of the splint, and a connecting pipe is provided on the back of the movable plate. The negative pressure port in the movable plate is connected with the docking air chamber through the connecting port and the connecting pipe. A push hole is provided on the splint, and the push rod passes through the push hole and is slidably connected to the splint, and interferes with the opening airbag.

[0015] Furthermore, there are four push rods, four push holes and four opening air bags, and the push rods are distributed at the four corners of the movable plate. The positions of the push holes and the opening air bags are adapted to the push rods.

[0016] Furthermore, there are multiple movable plates and sealing plates, which are distributed on the clamping plate in a linear array at intervals.

[0017] Furthermore, the negative pressure ports are divided into multiple groups and are opened in a linear array. A rubber pad is provided on the movable plate, and the rubber pad is adapted to the negative pressure port.

[0018] Furthermore, a welding robot arm is provided on the processing platform, and two welding robot arms are located on both sides of the positioning platform.

[0019] Furthermore, a transverse guide rail module is provided between the bottom surface of the welding robot arm and the positioning table and the processing platform.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In the present invention, during the positioning and clamping process, negative pressure adsorption assists to further ensure that the components will not be displaced during the welding process, greatly improving the positioning and clamping accuracy, ensuring the welding quality, and the movement of the splint and the negative pressure change of the negative pressure airbag can be automatically adjusted according to the size of the protective door component. Whether it is a small component or a large component, precise positioning, effective clamping and adaptive negative pressure adsorption can be achieved, which greatly enhances the versatility and adaptability of the device to workpieces of different sizes.

[0022] In the present invention, multiple movable plates and sealing sheets are distributed on the splint in a linear array at intervals, which means that when contacting the protective door component, contact and adjustment can be performed segment by segment and at multiple points according to the surface contour of the component. The irregularly shaped protective door component has many changes in contour. The movable plates, sealing sheets and negative pressure ports distributed in a linear array can flexibly respond to these changes. When encountering local protrusions, depressions or special shape areas on the workpiece, the movable plates at the corresponding positions can be displaced independently to trigger the negative pressure adsorption mechanism.

[0023] In the present invention, multiple negative pressure ports opened in a linear array can generate negative pressure adsorption force from more positions on the basis of fitting the contour of the component. These negative pressure ports can closely fit the contour of the component to achieve all-round, multi-point contact. For protective door components with complex curved surfaces or irregular edges, the negative pressure ports in the linear array can adjust the adsorption position section by section according to the undulations of the component surface to ensure that every key part can be effectively covered. On the basis of fitting the contour of the component, many negative pressure ports work simultaneously to generate negative pressure adsorption force from more positions. This multi-directional adsorption force can effectively resist the displacement of components caused by factors such as welding thermal deformation and mechanical vibration, further stabilize the components, and improve positioning accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a positioning and clamping device for welding protective doors;

[0025] Figure 2 This is a schematic diagram of the positioning structure of a positioning clamping device for welding a protective door;

[0026] Figure 3 This is a schematic diagram of the exploded structure of a positioning and clamping device for welding protective doors;

[0027] Figure 4 This is a schematic diagram of the clamping plate structure of a positioning and clamping device for welding a protective door;

[0028] Figure 5 This is a schematic diagram of the movable plate structure of a positioning and clamping device for welding a protective door;

[0029] Figure 6 This is a schematic diagram of the connecting plate structure of a positioning and clamping device for welding a protective door;

[0030] Figure 7 This is a schematic diagram of the opening structure of a positioning clamping device for welding a protective door;

[0031] Figure 8 This is a schematic diagram of the back structure of the connecting plate of a positioning clamping device for welding a protective door.

[0032] In the picture:

[0033] 1. Processing platform; 11. Welding robot arm;

[0034] 2. Positioning platform; 21. Base; 22. Rotating motor; 23. Rotating plate; 24. Vertical slot; 25. Oblique slot;

[0035] 3. Clamp; 31. Vertical slider; 32. Diagonal column;

[0036] 4. Movable plate; 41. Spring;

[0037] 5. Sealing piece; 51. Connecting port; 52. Push rod; 53. Connecting pipe; 54. Push hole; 55. Opening airbag; 56. Connecting air path; 57. Opening rod;

[0038] 6. Negative pressure airbag; 61. Connecting air hole; 62. Connecting trachea; 63. Connecting air chamber; 64. Connecting air hole;

[0039] 7. Rubber pad. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0041] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0042] See also Figure 1-8 , the present invention provides a technical solution:

[0043] A positioning and clamping device for welding a protective door includes a processing platform 1 and a positioning platform 2. A welding robot arm 11 is provided on the processing platform 1. The welding robot arm 11 has two located on both sides of the positioning platform 2. A transverse guide rail module is provided between the bottom surface of the welding robot arm 11 and the positioning platform 2 and the processing platform 1.

[0044] The positioning platform 2 can move in the transverse direction through a transverse guide rail module provided between its bottom surface and the processing platform 1 .

[0045] Before welding the protective door, the positioning platform 2 is first moved to a suitable initial position so as to accurately position the protective door components.

[0046] The protective door component to be welded is placed on the positioning platform 2. The positioning platform 2 itself plays a role in preliminary positioning, ensuring that the protective door component is in a suitable starting position for welding.

[0047] The two welding robot arms 11 can also move in the lateral direction through the lateral guide rail module between the bottom surface thereof and the processing platform 1 .

[0048] After the positioning platform 2 completes positioning of the protective door component, the welding robot arm 11 can move along the transverse guide rail module to a position close to the protective door component according to the welding process requirements, and prepare for welding operations.

[0049] During the welding process, the welding robot arm 11 can also adjust its own position through the transverse guide rail module to adapt to the welding requirements of different parts of the protective door, such as moving along the edge of the protective door for welding.

[0050] The welding robot arm 11 is equipped with corresponding welding tools. After moving to a suitable position, the welding robot arm 11 is started and performs welding operations on the protective door components according to a preset welding program to firmly weld the components together.

[0051] The transverse guide rail module enables both the positioning platform 2 and the welding robot arm 11 to have good mobility. For protective doors of different sizes and shapes, the positioning platform 2 can be moved to the appropriate position for adaptive positioning, and the welding robot arm 11 can also be flexibly moved to different positions for welding, which greatly improves the adaptability of the device to welding various protective doors.

[0052] The bottom surface of the positioning platform 2 is connected to the base 21, and the top surface of the base 21 is provided with a rotating motor 22. The output shaft of the rotating motor 22 is connected to the rotating plate 23. The top surface of the positioning platform 2 is provided with a vertical groove 24, and the rotating plate 23 is provided with an oblique groove 25 staggered with the vertical groove 24. The bottom surface of the splint 3 is provided with a vertical slider 31 that is slidably connected to the vertical groove 24, and the bottom surface of the vertical slider 31 is connected to an oblique column 32 that is slidably connected to the oblique groove 25. There are four vertical grooves 24, four oblique grooves 25 and four negative pressure airbags 6 arranged in a circular array.

[0053] The positioning platform 2 can be moved to a suitable initial position before welding through the transverse guide rail module between the base 21 and the processing platform 1 to prepare for the positioning of the protective door components.

[0054] After the rotating motor 22 on the top surface of the base 21 is started, its output shaft drives the rotating plate 23 to rotate.

[0055] Since the top surface of the positioning platform 2 is provided with a vertical groove 24 and the rotating plate 23 is provided with an oblique groove 25 and the two are staggered, when the rotating plate 23 rotates, the vertical slider 31 (connected to the bottom surface of the clamping plate 3) which is slidingly connected to the vertical groove 24 will cause the vertical slider 31 to move vertically in the vertical groove 24 due to the action of the oblique groove 25 on the oblique column 32 (connected to the bottom surface of the vertical slider 31).

[0056] Because there are four vertical grooves 24, four oblique grooves 25 and four negative pressure airbags 6 arranged in a circular array, when the rotating motor 22 drives the rotating plate 23 to rotate, the four clamping plates 3 can move toward or away from the center synchronously, thereby realizing precise positioning and clamping of protective door components of different sizes placed on the positioning platform 2.

[0057] After the protective door component is positioned and clamped, the welding robot arm 11 moves to a position close to the component through the transverse guide rail module and starts welding according to the preset program. During the welding process, the welding robot arm 11 can also adjust its position with the help of the transverse guide rail module to complete welding of different parts.

[0058] The rotating motor 22 drives the rotating plate 23 to rotate, driving the splint 3 to move precisely, which can not only adapt to the positioning of protective door components of different sizes, but also achieve more accurate center positioning of the components through precise circular array layout, greatly improving positioning accuracy and versatility.

[0059] The four clamping plates 3 move synchronously to clamp the protective door components from multiple directions, which can effectively prevent the components from shifting during the welding process and ensure the welding quality.

[0060] The automatically adjusted positioning and clamping process of the clamping plate 3 reduces manual auxiliary operations, and cooperates with the welding robot arm 11 and the transverse guide rail module to greatly improve the overall welding work efficiency.

[0061] The structures of the rotating motor 22, vertical slot 24, oblique slot 25, etc. are relatively clear and simple, and are easy to troubleshoot and repair when a fault occurs. In addition, the positioning and clamping range of the splint 3 can be flexibly adjusted by adjusting the parameters of the rotating motor 22 according to the requirements of different protective door components.

[0062] One end of the negative pressure airbag 6 is fixedly connected to the positioning platform 2, and a connecting air hole 61 is provided on the vertical slider 31. A connecting air pipe 62 is provided on the top surface of the vertical slider 31, and a docking air hole 64 is provided in the docking air chamber 63. The other end of the connecting air pipe 62 is communicated with the docking air hole 64. A port communicating with the docking air chamber 63 is provided on the splint 3, and a sealing sheet 5 is provided on the outside of the port. A movable plate 4 is provided on the splint 3, and a negative pressure port is provided on the movable plate 4. The movable plate 4 is sealed with the port, and a push rod 52 slidably connected to the splint 3 is provided on the movable plate 4. A spring 41 is provided between the splint 3 and the movable plate 4. An opening airbag 55 whose position coincides with the push rod 52 is provided in the splint 3. The opening airbag 55 is connected to a connecting air path 56, and the connecting air path 56 is connected to an opening rod 57 whose position coincides with the port;

[0063] A connecting port 51 is provided on the front of the splint 3, and a connecting pipe 53 is provided on the back of the movable plate 4. The negative pressure port in the movable plate 4 is connected with the docking air chamber 63 through the connecting port 51 and the connecting pipe 53. A push hole 54 is provided on the splint 3, and the push rod 52 passes through the push hole 54 and is slidably connected to the splint 3, and conflicts with the opening airbag 55. There are four push rods 52, push holes 54 and opening airbags 55. The push rods 52 are distributed at the four corners of the movable plate 4, and the positions of the push holes 54 and the opening airbag 55 are adapted to the push rods 52.

[0064] The positioning table 2 relies on the transverse guide rail module between the base 21 and the processing platform 1 to move to the appropriate initial position before welding, laying the foundation for the positioning of the protective door components. When the rotating motor 22 drives the rotating plate 23 to rotate, the four clamping plates 3 can move synchronously toward or away from the center to achieve positioning and preliminary clamping of protective door components of different sizes.

[0065] During the clamping process, in the initial state, the sealing sheets 5 are located on the outside and in contact with each other and cannot shrink inward, so the docking air chamber 63 is closed.

[0066] When the protective door component contacts the clamping plate 3 , it first abuts against the movable plate 4 . The movable plate 4 is forced to retract toward the clamping plate 3 , pushing the push rod 52 to squeeze and open the airbag 55 .

[0067] After the airbag 55 is opened and pressurized, the opening rod 57 is raised through the connecting air path 56 to push open the sealing sheet 5. At this time, the docking air chamber 63 contacts the surface of the protective door component.

[0068] One end of the negative pressure airbag 6 is fixed in the positioning platform 2, and the negative pressure generated by it is transmitted to the docking air chamber 63 through the connecting air hole 61, the connecting air pipe 62, and the docking air hole 64, thereby adsorbing the surface of the protective door component and enhancing the stability of the component clamping.

[0069] Moreover, when the clamp 3 is closest to the center of the positioning table 2, the negative pressure airbag 6 is stretched to the minimum, and the corresponding clamped workpiece size is the smallest. At this time, the negative pressure is also the minimum. The negative pressure increases with the increase of the workpiece size, realizing adaptive negative pressure adsorption of workpieces of different sizes.

[0070] The rotating motor 22 drives the rotating plate 23 to rotate, accurately controls the movement of the clamping plate 3, and combines the circular array layout to achieve high-precision center positioning of the protective door components. At the same time, during the positioning and clamping process, negative pressure adsorption assists to further ensure that the components will not be displaced during the welding process, greatly improving the positioning and clamping accuracy and ensuring welding quality.

[0071] The movement of the splint 3 and the negative pressure change of the negative pressure airbag 6 can be automatically adjusted according to the size of the protective door component. Whether it is a small component or a large component, precise positioning, effective clamping and adaptive negative pressure adsorption can be achieved, which greatly enhances the versatility and adaptability of the device to workpieces of different sizes.

[0072] From component positioning and clamping to negative pressure adsorption fixation, the entire process is highly automated, reducing a large amount of manual auxiliary operations. Combined with the efficient operation of the welding robot arm 11 and the transverse guide rail module, the welding cycle is greatly shortened and the overall work efficiency is significantly improved.

[0073] The structures of the rotating motor 22, vertical slots 24, oblique slots 25, negative pressure airbags 6 and related air paths in the device are relatively clear and simple, and are easy to check and repair when a fault occurs.

[0074] The negative pressure adsorption assisted clamping method, based on traditional mechanical clamping, additionally increases the fixing force of the protective door components, effectively resists the thermal stress and mechanical vibration generated during the welding process, further ensures the stability of the components during the welding process, improves the reliability of welding, and reduces the occurrence of welding defects.

[0075] There are multiple movable plates 4 and sealing plates 5, which are distributed on the clamping plate 3 in a linear array. The negative pressure ports are divided into multiple groups and opened in a linear array. A rubber pad 7 is provided on the movable plate 4, and the rubber pad 7 is adapted to the negative pressure port.

[0076] The plurality of movable plates 4 and sealing sheets 5 are spaced apart and distributed in a linear array on the clamping plate 3, which means that when contacting the protective door component, contact and adjustment can be performed section by section and at multiple points according to the surface contour of the component.

[0077] Compared to settings with fewer or non-array distribution, the linear array can more closely and comprehensively fit the edges of workpieces with various complex shapes, making positioning more precise and ensuring a higher level of position accuracy for protective door components before welding.

[0078] Multiple negative pressure ports arranged in a linear array can generate negative pressure adsorption force from more locations while fitting the contours of the components, further stabilizing the components and improving positioning accuracy.

[0079] The irregularly shaped protective door components have many changes in their contours, and the movable panels 4, sealing sheets 5 and negative pressure ports distributed in a linear array can flexibly cope with these changes.

[0080] When encountering a local protrusion, depression or special shape area on the workpiece, the movable plate 4 at the corresponding position can independently move to trigger the negative pressure adsorption mechanism.

[0081] For example, there is a small protrusion on the edge of the workpiece. When the movable plate 4 at this position is squeezed, it will push the push rod 52 to open the airbag 55, and then allow the corresponding docking air chamber 63 and the negative pressure port to adsorb and fix the protrusion without affecting the positioning and adsorption of other parts, thereby achieving personalized and precise fixation of irregular workpieces.

[0082] Since the movable panels 4 are distributed in a linear array, when the protective door component is placed on the clamping plate 3 , the surface of the component will contact multiple movable panels 4 at the same time.

[0083] Compared with the setting of a small number of movable plates 4, more contact points mean that in a shorter time, a sufficient number of movable plates 4 are squeezed and displaced, pushing the push rod 52 to squeeze open the airbag 55, thereby quickly pushing open the sealing plate 5, so that the docking air chamber 63 and the negative pressure port begin to adsorb the workpiece.

[0084] For example, if there is only one movable plate 4, the component may need to move over a large range to trigger adsorption. However, multiple linear array movable plates 4 can quickly start the adsorption process as soon as the component is placed in place, greatly shortening the time from placing the workpiece to completing fixation, and improving overall work efficiency.

[0085] The linear array arrangement of multiple movable plates 4 and sealing sheets 5 can trigger the negative pressure adsorption mechanism more quickly when contacting a workpiece, saving preparation time and further improving efficiency.

[0086] The linear array design makes the device more adaptable to irregularly shaped workpieces and can better adsorb and fix the local features of the workpiece.

[0087] The rubber pad 7 is adapted to the negative pressure port. When negative pressure is generated, the rubber pad 7 can fill the tiny gap between the negative pressure port and the workpiece surface, forming a better sealing effect and reducing air leakage, thereby making the adsorption force more stable and less susceptible to interference from factors such as vibration and airflow during welding.

[0088] During the welding process, stable suction ensures that the protective door components remain in the correct position, reducing welding defects caused by displacement. Furthermore, the soft rubber pad 7 acts as a buffer between the clamping plate 3 and the workpiece during the suction process, effectively preventing the hard material of the clamping plate 3 from directly scratching and abrading the workpiece surface. This protective effect is particularly important for protective door components that require special surface treatments and high aesthetic quality.

[0089] The rubber pad 7 enhances the sealing performance of the negative pressure adsorption, making the adsorption force more stable, and can better cope with various interferences during the welding process, thereby improving the welding stability and reliability.

[0090] At the same time, the rubber pad 7 has a certain degree of softness, which can prevent the splint 3 from making direct hard contact with the surface of the protective door component during the negative pressure adsorption process, thereby preventing scratches, wear and other damages to the workpiece surface. It is especially suitable for welding protective door components with high surface quality requirements.

Claims

1. A positioning and clamping device for welding a protective door, comprising a processing platform (1) and a positioning platform (2), characterized in that: The positioning platform (2) is slidably provided with a clamping plate (3), one end of a negative pressure airbag (6) is fixedly connected to the positioning platform (2), a docking air chamber (63) in communication with the negative pressure airbag (6) is provided in the clamping plate (3), a port in communication with the docking air chamber (63) is provided on the clamping plate (3), a sealing sheet (5) is provided on the outer side of the port, a movable plate (4) is provided on the clamping plate (3), a negative pressure port is provided on the movable plate (4), the movable plate (4) is sealed with the port, a push rod (52) in sliding connection with the clamping plate (3) is provided on the movable plate (4), a spring (41) is provided between the clamping plate (3) and the movable plate (4), an opening airbag (55) whose position coincides with the push rod (52) is provided in the clamping plate (3), the opening airbag (55) is connected to a connecting air path (56), and the connecting air path (56) is connected to an opening rod (57) whose position coincides with the port.

2. A positioning and clamping device for welding a protective door according to claim 1, characterized in that: The bottom surface of the positioning platform (2) is connected to a base (21), the top surface of the base (21) is provided with a rotating motor (22), the output shaft of the rotating motor (22) is connected to a rotating plate (23), the top surface of the positioning platform (2) is provided with a vertical groove (24), the rotating plate (23) is provided with an oblique groove (25) staggered with the vertical groove (24), the bottom surface of the clamping plate (3) is provided with a vertical slider (31) slidably connected to the vertical groove (24), and the bottom surface of the vertical slider (31) is connected to an oblique column (32) slidably connected to the oblique groove (25).

3. A positioning and clamping device for welding a protective door according to claim 2, characterized in that: A connecting air hole (61) is provided on the vertical slider (31), a connecting air pipe (62) is provided on the top surface of the vertical slider (31), a connecting air hole (64) is provided in the docking air chamber (63), and the other end of the connecting air pipe (62) is in communication with the docking air hole (64).

4. A positioning and clamping device for welding a protective door according to claim 3, characterized in that: The vertical grooves (24), the oblique grooves (25) and the negative pressure airbags (6) are each arranged in a circular array in four pieces.

5. A positioning and clamping device for welding a protective door according to claim 4, characterized in that: The front of the splint (3) is provided with a connection port (51), and the back of the movable plate (4) is provided with a connection pipe (53). The negative pressure port in the movable plate (4) is connected to the docking air chamber (63) through the connection port (51) and the connection pipe (53). The splint (3) is provided with a push hole (54). The push rod (52) passes through the push hole (54) and is slidably connected to the splint (3), and contacts the opening air bag (55).

6. A positioning and clamping device for welding a protective door according to claim 5, characterized in that: There are four push rods (52), four push holes (54) and four opening air bags (55). The push rods (52) are distributed at the four corners of the movable plate (4). The positions of the push holes (54) and the opening air bags (55) are adapted to the push rods (52).

7. A positioning and clamping device for welding a protective door according to claim 6, characterized in that: There are a plurality of movable plates (4) and sealing plates (5), which are distributed on the clamping plate (3) at intervals in a linear array.

8. A positioning and clamping device for welding a protective door according to claim 7, characterized in that: The negative pressure ports are divided into a plurality and are opened in a linear array. A rubber pad (7) is provided on the movable plate (4), and the rubber pad (7) is adapted to the negative pressure ports.

9. A positioning and clamping device for welding a protective door according to claim 8, characterized in that: A welding robot arm (11) is provided on the processing platform (1), and two welding robot arms (11) are located on both sides of the positioning platform (2).

10. A positioning and clamping device for welding a protective door according to claim 9, characterized in that: A transverse guide rail module is provided between the bottom surfaces of the welding robot arm (11) and the positioning platform (2) and the processing platform (1).

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