A three-dimensional welding platform with a protective structure and its welding method

Abstract

The application relates to the technical field of welding platforms, and discloses a three-dimensional welding platform with a protection structure, which comprises a machining table, a horizontal moving component is fixedly installed at the front side edge of the machining table, a lifting component is arranged at the top of the horizontal moving component, a deflection component is fixedly installed at the top of the lifting component, a protection plate is fixedly installed at the top of the deflection component, and an adjusting component is fixedly installed at the left end of the deflection component. When welding workpieces at different positions on the top of the machining table, the left hand holds the holding handle, then walks leftward and rightward, the demand for face protection is met, the left hand holds the holding handle again, the pressing switch is pressed by fingers, the output end of the electric push rod is elongated, the mounting plate is driven to move upwards along the guide rod, the holding handle is pushed by the left hand, the rotating shaft rotates in the shaft sleeve, the inclination angle of the protection plate is adjusted, and the purpose of protecting the operator in a large area is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of welding platforms, and particularly relates to a three-dimensional welding platform with a protection structure and a welding method thereof. Background Art

[0002] A three-dimensional welding platform is a base for supporting and fixing workpieces. Multiple through holes are provided at the top of the platform to facilitate the falling of debris generated during welding. Fixing parts are fixed at the top of the platform through bolts and the like in the through holes, and then the workpieces are stably fixed at the top of the platform. At this time, the workpieces can be welded.

[0003] When welding workpieces, the operator needs to hold a welding torch in one hand and a protective mask in the other hand. The protective area of the protective mask is small and cannot protect the trunk part. However, if only the area of the protective mask is increased, the weight will also increase, making it difficult to hold and inconvenient to protect the operator. Therefore, further improvements can be made. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] Aiming at the deficiencies of the prior art, the invention provides a three-dimensional welding platform with a protection structure and a welding method thereof, which have the advantages of protecting the operator without the need for hand-holding, etc., and solve the problems that the protective mask needs to be held by hand and has a small protective area.

[0006] (2) Technical Solutions

[0007] To achieve the above-mentioned purpose of protecting the operator without the need for hand-holding, the invention provides the following technical solutions: A three-dimensional welding platform with a protection structure includes a processing table. Through holes are arrayed on the surface of the processing table. Telescopic rods are fixedly installed at the four corners of the bottom of the processing table. A transverse movement component is fixedly installed at the front edge of the processing table. A lifting component is arranged on the top of the transverse movement component. A deflection component is fixedly installed on the top of the lifting component. A protective plate is fixedly installed on the top of the deflection component. An adjustment component is fixedly installed at the left end of the deflection component. A support component is fixedly installed at the right end of the deflection component.

[0008] Preferably, the transverse movement component includes a slide rail fixedly installed on the top of the processing table. A material dropping port extending to the lower side of the processing table is provided at the bottom of the slide rail. An inclined plate is integrally formed at the bottom of the front side wall of the material dropping port of the slide rail. A slider is slidably connected inside the slide rail. The cross section of the slider is in a "convex" shape and is adapted to the slide rail. A sliding seat is fixedly installed on the top of the slider, and the sliding seat abuts against the top of the slide rail and slides.

[0009] Preferably, the lifting component includes a support plate fixedly installed on the top of the slide and extending to the rear and upward. A guide rod is fixedly installed at the top of the support plate. An electric push rod is fixedly installed on the top of the slide and in front of the support plate. An mounting plate is fixedly installed on the top of the electric push rod. A sliding hole adapted to the guide rod is opened through the surface of the mounting plate. The guide rod is inserted into the sliding hole. The front half of the mounting plate is inclined to the lower front.

[0010] Preferably, the lifting component further includes a suction pipe fixedly installed on the rear side of the mounting plate, with air inlets arrayed on the rear side of the suction pipe, and air pumps fixedly installed at both ends of the suction pipe via flexible hoses.

[0011] Preferably, the deflection component includes two rotating shaft seats fixedly installed on the top of the mounting plate. Each rotating shaft seat has a bushing fixedly installed inside it. A fan-shaped plate is arranged in an array on the opposite side of each of the two bushings. An inclined surface is provided on the outer side of the free end of each fan-shaped plate. A rotating shaft is rotatably connected through the rotating shaft seat. A protective plate is fixedly installed on the top of the rotating shaft. An annular flange is fixedly installed at the end of the rotating shaft. A turntable is sleeved on the outer side of the annular flange. An annular groove is opened on the turntable corresponding to the annular flange. A spring is fixedly installed on the other side of the turntable. A friction disc is fixedly installed on the other end of the spring. A collar is fixedly installed on the other side of the friction disc. The friction disc abuts against the surface of the rotating shaft seat. An inclined portion adapted to the end of the fan-shaped plate is provided on the inner wall of the end of the collar. The collar is sleeved on the outer side of the fan-shaped plate and the bushing.

[0012] Preferably, the adjusting component includes a sleeve fitted on the outer side of the left end of the rotating shaft, the sleeve being fixedly installed on the side of the rotating shaft seat, a rotating arm extending backward and upward being fixedly installed on the left end of the rotating shaft, a grip extending to the right being fixedly installed on the other end of the rotating arm, and a push switch being fixedly installed on the surface of the grip.

[0013] Preferably, the push switch is electrically connected to the electric push rod and is connected in series in the same circuit.

[0014] Preferably, the support component includes a support base fixedly installed on the right end of the rotating shaft. A mounting plate is fixedly installed on the top of the support base. An annular groove is formed in the mounting plate. The inner wall of the annular groove is composed of multiple arc-shaped surfaces. A rotating column is embedded in the annular groove. The rotating column has a "convex" cross-section. Mounting holes are arrayed on the circumferential surface of the lower half of the rotating column. A second spring is fixedly installed on the end face of the mounting hole. A sliding column is fixedly installed on the other end of the second spring. The other end of the sliding column slides against the inner wall of the annular groove. An arc-shaped support is fixedly installed on the top of the rotating column.

[0015] Preferably, the welding method for this three-dimensional platform includes the following specific steps:

[0016] S1. The user supports their left arm on the top of the sleeve and grips the handle with their left hand, while holding the welding torch with their right hand and supporting their right arm on the top of the arc-shaped support. At this time, the face is located behind the protective plate, thus protecting the face and supporting both arms.

[0017] S2. By holding the handle with the left hand and moving left and right, the slider moves within the slide rail, and the slide block moves synchronously, thus adapting to the need for facial protection when welding workpieces at different positions on the top left and right of the processing table.

[0018] S3. Hold the handle with your left hand and press the switch with your fingers to extend the output end of the electric push rod, thereby moving the mounting plate upward along the guide rod. The sleeve and the arc-shaped bracket support the left and right arms to move up and down synchronously, and the protective plate moves upward synchronously to cover the front of the face.

[0019] S4. Then, push the handle with your left hand to make the shaft rotate inside the bushing, adjust the tilt angle of the protective plate, and the arc-shaped support rotates with the shaft to meet the welding requirements of the workpiece under different tilt angles. After the shaft stops rotating, the elasticity of the spring causes the assembly of the friction disc and the collar to move towards the surface of the shaft seat, so that the friction disc is in close contact with the surface of the shaft seat, ensuring the friction between the two. Then, the collar presses against the surface of the sector plate, causing the sector plate to tilt inward and press against the surface of the shaft, further ensuring the friction between the shaft and the shaft seat, and keeping the assembly of the protective plate and the shaft in the current tilt state.

[0020] S5. Then, with the right arm supporting the top of the arc-shaped support, when the right arm swings, it drives the assembly of the arc-shaped support and the rotating column to rotate in the annular groove. The sliding column slides on the inner wall of the annular groove. With the elasticity of the second spring, the friction between the sliding column and the inner wall of the annular groove is ensured, thereby inhibiting the rotation of the arc-shaped support. When the right arm stops swinging, the arc-shaped support is kept in the current position, providing stable support for the right arm.

[0021] (III) Beneficial Effects

[0022] Compared with the prior art, the present invention provides a three-dimensional welding platform with a protective structure and a welding method thereof, which has the following beneficial effects:

[0023] This three-dimensional welding platform with a protective structure and its welding method involves holding the handle with the left hand and moving left and right to move the slider within the slide rail, with the slide block moving synchronously. This adapts to the need for facial protection when welding workpieces at different positions on the top of the processing table. Holding the handle with the left hand and pressing a switch with the fingers extends the output end of the electric push rod, causing the mounting plate to move upward along the guide rod. This allows the sleeve and arc-shaped support to simultaneously support the left and right arms moving up and down, and the protective plate to move upward simultaneously, shielding the front of the face. By pushing the handle with the left hand, the rotating shaft rotates inside the bushing, adjusting the tilt angle of the protective plate. The arc-shaped support follows the rotation of the shaft, thus meeting the welding requirements of the workpiece at different tilt angles. The right arm supports the top of the arc-shaped support. When the right arm swings, it causes the assembly of the arc-shaped support and the rotating column to rotate within the annular groove. The sliding column slides on the inner wall of the annular groove, and the elasticity of the second spring ensures friction between the sliding column and the inner wall of the annular groove, thereby inhibiting the rotation of the arc-shaped support. When the right arm stops swinging, the arc-shaped support remains in its current position, providing stable support for the right arm. This achieves the purpose of providing large-area protection for the operator. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of a three-dimensional welding platform with a protective structure proposed in this invention;

[0025] Figure 2 This is a three-dimensional exploded view of the lifting component of a three-dimensional welding platform with a protective structure proposed in this invention.

[0026] Figure 3 This is a three-dimensional exploded view of the deflection component of a three-dimensional welding platform with a protective structure proposed in this invention.

[0027] Figure 4 This is a three-dimensional cross-sectional view of the deflection component of a three-dimensional welding platform with a protective structure proposed in this invention.

[0028] Figure 5 This is a three-dimensional exploded view of the support component of a three-dimensional welding platform with a protective structure proposed in this invention.

[0029] Figure 6 This is a three-dimensional cross-sectional view of the support component of a three-dimensional welding platform with a protective structure proposed in this invention.

[0030] In the diagram: 1. Processing table; 2. Through hole; 3. Telescopic rod; 4. Lateral movement component; 5. Lifting component; 6. Deflection component; 7. Protective plate; 8. Adjustment component; 9. Support component; 41. Slide rail; 42. Inclined plate; 43. Slider; 44. Slide seat; 51. Support plate; 52. Guide rod; 53. Electric push rod; 54. Mounting plate; 55. Sliding hole; 56. Suction pipe; 57. Air inlet; 61. Rotary... 62. Shaft seat; 63. Shaft sleeve; 64. Sector plate; 65. Rotating shaft; 66. Annular flange; 67. Turntable; 68. Spring 1; 69. Friction disc; 80. Collar; 81. Sleeve; 82. Rotating arm; 83. Grip handle; 84. Push switch; 91. Support base; 92. Mounting plate; 93. Annular groove; 94. Rotating column; 95. Mounting hole; 96. Spring 2; 97. Sliding column; 98. Arc-shaped support. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please see Figure 1 A three-dimensional welding platform with a protective structure includes a processing table 1. The surface of the processing table 1 is arrayed with through holes 2. Telescopic rods 3 are fixedly installed at the four corners of the bottom of the processing table 1. A transverse moving component 4 is fixedly installed at the front edge of the processing table 1. A lifting component 5 is provided on the top of the transverse moving component 4. A deflection component 6 is fixedly installed on the top of the lifting component 5. A protective plate 7 is fixedly installed on the top of the deflection component 6. An adjustment component 8 is fixedly installed on the left end of the deflection component 6. A support component 9 is fixedly installed on the right end of the deflection component 6.

[0033] Please see Figure 1 -2. The transverse component 4 includes a slide rail 41 fixedly installed on the top of the processing table 1. The bottom of the slide rail 41 has a discharge port extending to the lower side of the processing table 1. An inclined plate 42 is integrally formed on the bottom of the front side wall of the discharge port of the slide rail 41. Through the discharge port, during the welding process, debris splashed into the slide rail 41 can fall to the bottom of the processing table 1, and the inclined plate 42 further guides the debris, facilitating its fall. A slider 43 is slidably connected inside the slide rail 41. The slider 43 has a "convex" cross-section and is adapted to the slide rail 41. A slide block 44 is fixedly installed on the top of the slider 43, and slides against the top of the slide rail 41. Thus, the slider 43 and slide block 44 are clamped at the opening of the slide rail 41, allowing the slide block 44 to slide stably left and right on the top of the slide rail 41.

[0034] Please see Figure 2 The lifting component 5 includes a support plate 51 fixedly mounted on the top of the slide 44 and extending rearward and upward. A guide rod 52 is fixedly mounted on the top of the support plate 51. An electric push rod 53 is fixedly mounted on the top of the slide 44 and in front of the support plate 51. A mounting plate 54 is fixedly mounted on the top of the electric push rod 53. A sliding hole 55 adapted to the guide rod 52 is opened through the surface of the mounting plate 54. The guide rod 52 is inserted into the sliding hole 55. A stop plate is provided on the top of the guide rod 52 to prevent the mounting plate 54 from detaching from the guide rod 52. Thus, when the output end of the electric push rod 53 extends or retracts, the mounting plate 54 can be driven to move up and down along the guide rod 52. The front half of the mounting plate 54 is inclined forward and downward, and the inclined part of the mounting plate 54 can support the operator's torso. The lifting component 5 also includes a suction pipe 56 fixedly mounted on the rear side of the mounting plate 54. An air inlet 57 is arrayed on the rear side of the suction pipe 56. Air pumps are fixedly mounted on both ends of the suction pipe 56 through hoses. The air pump draws air into the suction pipe 56, and the gas generated during welding enters the suction pipe 56 through the air inlet 57, thus drawing out harmful gases and protecting the operator.

[0035] Please see Figure 3 -4. The deflection component 6 includes two rotating shaft seats 61 fixedly installed on the top of the mounting plate 54. Each rotating shaft seat 61 has a bushing 62 fixedly inserted inside. On opposite sides of each bushing 62, a fan-shaped plate 63 is arranged in an array. The free end of each fan-shaped plate 63 has an inclined surface. A rotating shaft 64 is rotatably connected inside the rotating shaft seat 61. A protective plate 7 is fixedly installed on the top of the rotating shaft 64, allowing the protective plate 7 to rotate with the rotating shaft 64. An annular flange 65 is fixedly installed at the end of the rotating shaft 64. A turntable 66 is fitted onto the outer side of the annular flange 65. The turntable 66 has an annular groove corresponding to the annular flange 65, allowing the rotating shaft 64 and the turntable 66 to rotate relative to each other. A spring 67 is fixedly installed on the other side of the turntable 66. A friction disc 68 is fixedly installed on the other end of the spring 67. A collar 69 is fixedly installed on the other side of the friction disc 68. The friction disc 68 abuts against the surface of the rotating shaft seat 61. The elasticity of the spring 67 ensures the friction between the friction disc 68 and the rotating shaft seat 61, and also ensures the friction between the turntable 66 and the rotating shaft 64. The inner wall of the end of the collar 69 is provided with an inclined portion that matches the end of the sector plate 63. The collar 69 is sleeved on the outside of the sector plate 63 and the bushing 62. Through the squeezing action of the collar 69 on the sector plate 63, the sector plate 63 tends to press tightly against the surface of the rotating shaft 64, ensuring the friction when the rotating shaft 64 rotates.

[0036] Please see Figure 3-4. The adjusting component 8 includes a sleeve 81 fitted onto the outer side of the left end of the rotating shaft 64, which supports the operator's left arm. The sleeve 81 is fixedly installed on the side of the rotating shaft seat 61. A rotating arm 82 extending rearward and upward is fixedly installed on the left end of the rotating shaft 64, and a grip 83 extending to the right is fixedly installed on the other end of the rotating arm 82. The grip 83 can be pushed with the left hand to rotate the assembly of the push switch 84 and the protective plate 7. The push switch 84 is fixedly installed on the surface of the grip 83. The push switch 84 is electrically connected to the electric push rod 53 and connected in series in the same circuit. When the left hand presses the push switch 84, the output end of the electric push rod 53 can be extended.

[0037] Please see Figure 5 -6. The support component 9 includes a support base 91 fixedly installed on the right end of the rotating shaft 64. A mounting plate 92 is fixedly installed on the top of the support base 91. An annular groove 93 is formed in the mounting plate 92. The inner wall of the annular groove 93 is composed of multiple arc-shaped surfaces. A rotating column 94 is embedded in the annular groove 93. The cross-section of the rotating column 94 is convex, so that the rotating column 94 is stably set in the annular groove 93. The mounting plate 92 and the rotating column 94 are rotatably connected. Mounting holes 95 are arrayed on the circumferential surface of the lower half of the rotating column 94. A second spring 96 is fixedly installed on the end face of the mounting hole 95. A sliding column 97 is fixedly installed on the other end of the second spring 96. The other end of the sliding column 97 slides against the inner wall of the annular groove 93. An arc-shaped support 98 is fixedly installed on the top of the rotating column 94. The elasticity of spring 96 ensures the friction between the sliding column 97 and the inner wall of the annular groove 93. Furthermore, the interlocking of the sliding column 97 with the arc-shaped surface within the annular groove 93 further suppresses the rotation of the rotating column 94, thus providing stable support for the right arm.

[0038] The welding method for this 3D platform has the following specific steps:

[0039] S1. The user supports his left arm on the top of the sleeve 81 and grasps the handle 83 with his left hand. He holds the welding torch with his right hand and supports his right arm on the top of the arc-shaped support 98. At this time, his face is located behind the protective plate 7, which protects his face and supports his arms.

[0040] S2. By holding the handle 83 with the left hand and moving left and right, the slider 43 is moved within the slide rail 41, and the slide block 44 moves synchronously, thereby adapting to the need for facial protection when welding workpieces at different positions on the top left and right of the processing table 1.

[0041] S3. Then, by holding the handle 83 with the left hand and pressing the switch 84 with the fingers, the output end of the electric push rod 53 is extended, thereby causing the mounting plate 54 to move upward along the guide rod 52. Thus, the sleeve 81 and the arc-shaped support 98 support the left and right arms to move up and down synchronously, and the protective plate 7 moves upward synchronously to cover the front of the face.

[0042] S4. Then, by pushing the handle 83 with the left hand, the rotating shaft 64 rotates inside the bushing 62, adjusting the tilt angle of the protective plate 7. The arc-shaped support 98 rotates with the rotating shaft 64, thereby meeting the welding requirements of the workpiece under different tilt angles. After the rotating shaft 64 stops rotating, the elasticity of the spring 67 causes the assembly of the friction disc 68 and the collar 69 to move towards the surface of the rotating shaft seat 61, so that the friction disc 68 is in close contact with the surface of the rotating shaft seat 61, ensuring the friction between the two. Then, the collar 69 presses against the surface of the sector plate 63, causing the sector plate 63 to tilt inward and press against the surface of the rotating shaft 64, further ensuring the friction between the rotating shaft 64 and the rotating shaft seat 61, so that the assembly of the protective plate 7 and the rotating shaft 64 remains in the current tilt state.

[0043] S5. Then, with the right arm supporting the top of the arc-shaped support 98, when the right arm swings, the assembly of the arc-shaped support 98 and the rotating column 94 rotates in the annular groove 93. The sliding column 97 slides on the inner wall of the annular groove 93. With the elastic action of the second spring 96, the friction between the sliding column 97 and the inner wall of the annular groove 93 is ensured, thereby inhibiting the rotation of the arc-shaped support 98. When the right arm stops swinging, the arc-shaped support 98 is kept in the current position, providing stable support for the right arm.

[0044] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A three-dimensional welding platform with a protective structure, comprising a processing table (1), characterized in that: The surface of the processing table (1) is provided with through holes (2), and telescopic rods (3) are fixedly installed at the four corners of the bottom of the processing table (1). A transverse component (4) is fixedly installed at the front edge of the processing table (1). A lifting component (5) is provided on the top of the transverse component (4). A deflection component (6) is fixedly installed on the top of the lifting component (5). A protective plate (7) is fixedly installed on the top of the deflection component (6). An adjustment component (8) is fixedly installed on the left end of the deflection component (6). A support component (9) is fixedly installed on the right end of the deflection component (6). The support component (9) includes a support base (91) fixedly installed on the right end of the rotating shaft (64). A mounting plate (92) is fixedly installed on the top of the support base (91). An annular groove (93) is opened in the mounting plate (92). The inner wall of the annular groove (93) is composed of multiple arc-shaped surfaces. A rotating column (94) is embedded in the annular groove (93). The cross-section of the rotating column (94) is convex. Mounting holes (95) are arrayed on the circumferential surface of the lower half of the rotating column (94). A second spring (96) is fixedly installed on the end face of the mounting hole (95). A sliding column (97) is fixedly installed on the other end of the second spring (96). The other end of the sliding column (97) slides against the inner wall of the annular groove (93). An arc-shaped support (98) is fixedly installed on the top of the rotating column (94).

2. The three-dimensional welding platform with a protective structure according to claim 1, characterized in that: The transverse component (4) includes a slide rail (41) fixedly installed on the top of the processing table (1). The bottom of the slide rail (41) has a material drop port extending to the lower side of the processing table (1). The bottom of the front side wall of the material drop port of the slide rail (41) is integrally formed with an inclined plate (42). The slide rail (41) is slidably connected to a slider (43). The slider (43) has a "convex" cross-section. The slide rail (41) and the slider (43) are adapted to each other. A slide seat (44) is fixedly installed on the top of the slider (43). The slide seat (44) slides against the top of the slide rail (41).

3. The three-dimensional welding platform with a protective structure according to claim 2, characterized in that: The lifting component (5) includes a support plate (51) fixedly installed on the top of the slide (44) and extending to the rear and upper side. A guide rod (52) is fixedly installed on the top of the support plate (51). An electric push rod (53) is fixedly installed on the top of the slide (44) and in front of the support plate (51). An mounting plate (54) is fixedly installed on the top of the electric push rod (53). A sliding hole (55) adapted to the guide rod (52) is opened through the surface of the mounting plate (54). The guide rod (52) is inserted into the sliding hole (55). The front half of the mounting plate (54) is inclined to the lower front side.

4. The three-dimensional welding platform with a protective structure according to claim 3, characterized in that: The lifting component (5) also includes a suction pipe (56) fixedly installed on the rear side of the mounting plate (54). The suction pipe (56) has an air inlet (57) arrayed on the rear side. Air pumps are fixedly installed at both ends of the suction pipe (56) through hoses.

5. The three-dimensional welding platform with a protective structure according to claim 4, characterized in that: The deflection component (6) includes two pivot seats (61) fixedly mounted on the top of the mounting plate (54). Each pivot seat (61) has a bushing (62) fixedly mounted inside it. Each bushing (62) has a fan-shaped plate (63) arranged in an array on opposite sides. The free end of each fan-shaped plate (63) has an inclined surface. A pivot shaft (64) is rotatably connected inside the pivot seat (61). A protective plate (7) is fixedly mounted on the top of the pivot shaft (64). An annular flange (65) is fixedly mounted at the end of the pivot shaft (64). The annular flange (65) has an outer... A turntable (66) is provided on the side. The turntable (66) has an annular groove corresponding to the annular flange (65). A spring (67) is fixedly installed on the other side of the turntable (66). A friction disc (68) is fixedly installed on the other end of the spring (67). A collar (69) is fixedly installed on the other side of the friction disc (68). The friction disc (68) abuts against the surface of the rotating shaft seat (61). The inner wall of the end of the collar (69) is provided with an inclined part that matches the end of the sector plate (63). The collar (69) is sleeved on the outside of the sector plate (63) and the bushing (62).

6. The three-dimensional welding platform with a protective structure according to claim 5, characterized in that: The adjustment component (8) includes a sleeve (81) sleeved on the outer side of the left end of the rotating shaft (64). The sleeve (81) is fixedly installed on the side of the rotating shaft seat (61). A rotating arm (82) extending backward and upward is fixedly installed on the left end of the rotating shaft (64). A grip (83) extending to the right is fixedly installed on the other end of the rotating arm (82). A push switch (84) is fixedly installed on the surface of the grip (83).

7. The three-dimensional welding platform with a protective structure according to claim 6, characterized in that: The push switch (84) is electrically connected to the electric push rod (53) and is connected in series in the same circuit.

8. The three-dimensional welding platform with a protective structure according to claim 7, characterized in that, The welding method of this three-dimensional welding platform has the following specific steps: S1. The user supports his left arm on the top of the sleeve (81) and grasps the handle (83) with his left hand. He holds the welding gun with his right hand and supports his right arm on the top of the arc-shaped support (98). At this time, his face is located behind the protective plate (7), thus protecting his face and supporting his arms. S2. By holding the handle (83) with the left hand and walking to the left and right, the slider (43) is driven to slide in the slide rail (41), and the slide block (44) moves synchronously, so as to meet the needs of face protection when welding workpieces at different positions on the top left and right of the processing table (1). S3. Then, hold the handle (83) with your left hand and press the switch (84) with your fingers to extend the output end of the electric push rod (53), thereby causing the mounting plate (54) to move upward along the guide rod (52). Thus, the sleeve (81) and the arc-shaped support (98) support the left and right arms to move up and down synchronously, and the protective plate (7) moves upward synchronously to cover the front of the face. S4. Then, by pushing the handle (83) with the left hand, the shaft (64) rotates inside the bushing (62), adjusting the tilt angle of the protective plate (7). The arc-shaped support (98) rotates with the shaft (64), thereby meeting the welding requirements of the workpiece under different tilt angles. After the shaft (64) stops rotating, the elasticity of the spring (67) causes the assembly of the friction disc (68) and the collar (69) to move towards the surface of the shaft seat (61), so that the friction disc (68) is pressed tightly against the surface of the shaft seat (61), ensuring the friction between the two. Then, the collar (69) presses against the surface of the sector plate (63), causing the sector plate (63) to tilt inward and press against the surface of the shaft (64), further ensuring the friction between the shaft (64) and the shaft seat (61), so that the assembly of the protective plate (7) and the shaft (64) remains in the current tilt state. S5. Then, by supporting the right arm on the top of the arc-shaped support (98), when the right arm swings, it drives the assembly of the arc-shaped support (98) and the rotating column (94) to rotate in the annular groove (93). The sliding column (97) slides on the inner wall of the annular groove (93). With the elastic action of the second spring (96), the friction between the sliding column (97) and the inner wall of the annular groove (93) is ensured, thereby suppressing the rotation of the arc-shaped support (98). When the right arm stops swinging, the arc-shaped support (98) is kept in the current position, providing stable support for the right arm.

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