A kind of automatic welding equipment for measuring tube inner arc piece

Abstract

The application discloses a kind of automatic welding equipment of determination tube inner arc piece, including table board, rack is installed on the table board, steering motor is installed on the rack, the machine shaft of steering motor is installed with carousel, four fixed rods are symmetrically installed on the lateral wall of carousel, the end of each fixed rod away from carousel is installed with limit plate, the side of each limit plate away from fixed rod is fixedly installed with arc surface positioning plate.The application realizes continuous welding production by rotating mode to successively fix and weld, and realizes the quick positioning and fixing between determination tube and inner arc piece by the way of pressurizing and abutting positioning to fix determination tube and inner arc piece and by the way of decompressing to release determination tube and inner arc piece, increases the reliability of welding, and does not need manual operation, is safer and more efficient.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to an automatic welding device for measuring the arc-shaped sheet inside a tube. Background Technology

[0002] Existing welding equipment for water meter measuring tubes and inner arc plates typically uses welding fixtures for manual fixing. This requires manually placing the measuring tube and inner arc plate together and fixing them with the fixture before welding them together using a welding machine. Although this increases welding accuracy, manual fixing poses safety hazards, requires repeated disassembly and assembly, and cannot be done continuously. Furthermore, the manual fixing method is slow, resulting in low welding efficiency for measuring tubes and inner arc plates on the production line. Summary of the Invention

[0003] The purpose of this invention is to solve the problems of insufficient safety of manual positioning and fixing welding in the prior art, inability to produce continuously, and low production efficiency due to the complexity of the positioning and fixing steps. Therefore, an automatic welding device for measuring the arc-shaped pieces inside the tube is proposed.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] An automatic welding device for measuring arc-shaped pieces inside a tube includes a platform with a frame mounted on it. A steering motor is mounted on the frame, and a turntable is mounted on the shaft of the steering motor. Four fixing rods are symmetrically mounted on the side wall of the turntable. A limit plate is mounted on the end of each fixing rod away from the turntable. An arc-shaped positioning plate is fixedly mounted on the side of each limit plate away from the fixing rod. A right-angle tube is inserted into the upper arc surface of each arc-shaped positioning plate. The upper end of each right-angle tube extends above the arc-shaped positioning plate and is sealed with a locking pin. Each locking pin has a circumferential joint on its side wall. The device has multiple arc-shaped locking holes extending to the bottom of the locking pin. A piston pin is slidably installed in each arc-shaped locking hole, and an arc-shaped locking rod is installed on each piston pin. The end of each arc-shaped locking rod away from the piston pin extends to the outside of the locking pin. A movable welding mechanism is installed on the platform, and two brackets are installed on the platform. A gas rod is installed on the side of each bracket away from the arc-shaped positioning plate. The movable end of the gas rod passes through the bracket and is fitted with a pressure regulating box. A controller is installed on the platform, and the steering motor is electrically connected to the controller. The control end of the gas rod is connected to the controller via a hose.

[0006] Furthermore, each of the arc-shaped positioning plates is embedded with a pressure guiding main pipe, and multiple pressure guiding branch pipes are symmetrically inserted at equal intervals on the bottom side wall of each pressure guiding main pipe. A positioning rod is slidably inserted at the lower end of each pressure guiding branch pipe, and the upper end of each positioning rod extends into the pressure guiding branch pipe and is fitted with a piston plate. The lower ends of two symmetrical positioning rods extend to the bottom of the arc-shaped positioning plate and are jointly fixedly installed with a clamping plate.

[0007] Furthermore, each of the arc-shaped positioning plates has a slot on the side away from the limiting plate, and each slot is equipped with three quick-connect female air tubes. The right-angle tube and the two pressure guiding tubes are connected to the corresponding quick-connect female air tubes at the ends near the slots.

[0008] Furthermore, each pressure regulating box is equipped with a sleeve at one end near the arc-shaped positioning plate, and three quick-connect male air tubes are installed on the side wall of each pressure regulating box located inside the sleeve. A control nozzle is installed on the side wall of each pressure regulating box. Two pressure regulating boxes are vertically distributed on the platform and correspond to two adjacent arc-shaped positioning plates. Each control nozzle is connected to the controller via a flexible hose.

[0009] Furthermore, the mobile welding mechanism includes two upright plates symmetrically fixed on a platform. Each upright plate has a vertical groove extending through its side wall. Two vertical slide rods are symmetrically installed in each vertical groove. A vertical cylinder slide plate is mounted on each of the two vertical slide rods on the same side. A guide rail plate is installed at the end of each vertical cylinder slide plate near the arc-shaped positioning plate. A horizontal groove is opened on the inner side of each guide rail plate. A horizontal slide rod is installed in each horizontal groove. A horizontal cylinder slide plate is slidably mounted on each horizontal slide rod. The control ends of the vertical cylinder slide plate and the horizontal cylinder slide plate are connected to a controller via flexible hoses.

[0010] Furthermore, a positioning frame is installed on both horizontal cylinder slide plates. Two positioning slide rods are symmetrically installed in the positioning frame. A cylinder base is installed on both positioning slide rods. A welding machine is installed on the cylinder base. The welding needle of the welding machine extends to the bottom of the cylinder base. The welding needle of the welding machine is located above the corresponding arc-shaped positioning plate. The welding machine is electrically connected to a controller. The cylinder base is connected to the controller through a flexible hose.

[0011] The advantages are: continuous welding production is achieved by fixing and welding successively through rotation; the measuring tube and the inner arc plate are fixed by pressurizing and positioning and then released by depressurizing, which realizes rapid positioning and fixing between the measuring tube and the inner arc plate, increasing the reliability of welding; and no manual operation is required, making it safer and more efficient. Attached Figure Description

[0012] Figure 1This is a schematic diagram of the structure of an automatic welding device for measuring the arc-shaped sheet inside a tube, as proposed in this invention.

[0013] Figure 2 This is an enlarged view of the clamping plate structure of an automatic welding device for measuring arc-shaped plates inside a tube, as proposed in this invention.

[0014] Figure 3 This is an enlarged view of the arc-shaped positioning plate part of the automatic welding equipment for measuring arc-shaped pieces inside a pipe, as proposed in this invention;

[0015] Figure 4 This is an enlarged view of a portion of the moving welding mechanism of an automatic welding device for measuring arc-shaped plates inside a tube, as proposed in this invention.

[0016] Figure 5 for Figure 2 Enlarged view of point A in the middle.

[0017] In the diagram: 1. Platform, 11. Frame, 12. Controller, 2. Steering Motor, 21. Turntable, 22. Fixing Rod, 23. Limiting Plate, 3. Arc-shaped Positioning Plate, 31. Slot, 32. Quick-connect Female Air Pipe, 4. Vertical Plate, 41. Vertical Slide, 42. Vertical Slide Rod, 43. Vertical Cylinder Slide Plate, 44. Guide Rail Plate, 45. Horizontal Slide, 46. Horizontal Slide Rod, 47. Horizontal Cylinder Slide Plate, 5. Positioning Frame, 51. Positioning Slide Rod, 52. Cylinder Base, 53. Welding Machine, 6. Bracket, 61. Air Rod, 7. Pressure Regulator Box, 71. Sleeve, 72. Quick-connect Male Air Pipe, 73. Control Nozzle, 8. Main Pressure Guide Pipe, 81. Branch Pressure Guide Pipe, 82. Positioning Rod, 83. Piston Plate, 84. Pressing Plate, 9. Right Angle Tube, 91. Locking Column, 92. Arc-shaped Locking Hole, 93. Piston Column, 94. Arc-shaped Locking Rod, a. Measuring Tube, b. Inner Arc-shaped Plate. Detailed Implementation

[0018] Reference Figure 1 , Figure 2 and Figure 5An automatic welding device for measuring arc-shaped pieces inside a tube includes a platform 1, a frame 11 mounted on the platform 1, a steering motor 2 mounted on the frame 11, a turntable 21 mounted on the shaft of the steering motor 2, four fixing rods 22 symmetrically mounted on the side wall of the turntable 21, a limit plate 23 mounted on the end of each fixing rod 22 away from the turntable 21, an arc-shaped positioning plate 3 fixedly mounted on the side of each limit plate 23 away from the fixing rod 22, a right-angle tube 9 inserted into the upper arc surface of each arc-shaped positioning plate 3, the upper end of each right-angle tube 9 extending above the arc-shaped positioning plate 3 and sealed with a locking post 91, and each locking post 91 having a symmetrically circumferential opening on its side wall. Multiple arc-shaped locking holes 92 extending to the bottom of the locking pin 91 are provided. A piston pin 93 is slidably installed in each arc-shaped locking hole 92. An arc-shaped locking rod 94 is installed on each piston pin 93. The end of each arc-shaped locking rod 94 away from the piston pin 93 extends to the outside of the locking pin 91. A movable welding mechanism is installed on the platform 1. Two brackets 6 are installed on the platform 1. A gas rod 61 is installed on the side of each bracket 6 away from the arc-shaped positioning plate 3. The movable end of the gas rod 61 passes through the bracket 6 and is equipped with a pressure regulating box 7. A controller 12 is installed on the platform 1. The steering motor 2 is electrically connected to the controller 12. The control end of the gas rod 61 is connected to the controller 12 through a hose.

[0019] The controller 12 can control the steering motor 2 to rotate the turntable 21, so that the fixed rod 22 and the limiting plate 23 drive the arc-shaped positioning plate 3 to rotate. The steering motor 2 rotates a right angle each time, which means that the arc-shaped positioning plate 3 can be transferred from one side to the adjacent side each time, realizing the transfer of the measuring tube a and the inner arc-shaped piece b.

[0020] The measuring tube a can be fitted onto the arc-shaped positioning plate 3, so that the hole on the measuring tube a can be fitted onto the right-angle tube 9 and the locking post 91, thereby achieving the positioning and installation of the measuring tube a. The hole of the inner arc-shaped piece b is fitted onto the locking post 91 and the right-angle tube 9, so that the inner arc-shaped piece b and the hole of the measuring tube a are in contact and fixed, avoiding the situation where the measuring tube a and the inner arc-shaped piece b slide against each other, which would cause welding misalignment and increase the reliability of welding.

[0021] When the pressure inside the right-angle tube 9 increases, the pressure inside the arc-shaped locking hole 92 also increases. This causes the piston rod 93 to rotate and move the arc-shaped locking rod 94 out of the arc-shaped locking hole 92, making the end of the arc-shaped locking rod 94 press tightly against the inner arc-shaped plate b. This makes the connection between the inner arc-shaped plate b and the measuring tube a tighter, preventing slippage and further increasing the reliability of the welding. When the pressure inside the right-angle tube 9 decreases, the pressure inside the arc-shaped locking hole 92 also decreases. This causes the piston rod 93 to move the arc-shaped locking rod 94 back, allowing the arc-shaped locking rod 94 to enter the arc-shaped locking hole 92. This does not affect the installation of the measuring tube a and the inner arc-shaped plate b.

[0022] Reference Figure 2 and Figure 3Each arc-shaped positioning plate 3 is embedded with a pressure guiding main pipe 8. Multiple pressure guiding branch pipes 81 are symmetrically inserted at equal intervals on the bottom side wall of each pressure guiding main pipe 8. A positioning rod 82 is slidably inserted at the lower end of each pressure guiding branch pipe 81. The upper end of each positioning rod 82 extends into the pressure guiding branch pipe 81 and is fitted with a piston plate 83. The lower ends of two symmetrical positioning rods 82 extend to the bottom of the arc-shaped positioning plate 3 and are jointly fixedly installed with a clamping plate 84.

[0023] When the pressure inside the main pressure guiding pipe 8 increases, the pressure inside the branch pressure guiding pipe 81 also increases. This causes the piston plate 83 to push the positioning rod 82, causing the clamping plate 84 to move downward. This allows the clamping plate 84 to press against the inner wall of the measuring pipe a, so that the side wall pipe a is pressed and fixed by the arc-shaped positioning plate 3 and multiple clamping plates 84, preventing the measuring pipe a from sliding on the arc-shaped positioning plate 3 and further increasing the reliability of the welding. When the pressure inside the main pressure guiding pipe 8 decreases, the pressure inside each branch pressure guiding pipe 81 decreases. This causes the piston plate 83 to move the positioning rod 82 upward, causing the clamping plate 84 to move upward, which in turn causes the clamping plate 84 to release the measuring pipe a, allowing the measuring pipe a to be easily removed from the arc-shaped positioning plate 3.

[0024] Reference Figure 1 and Figure 3 Each arc-shaped positioning plate 3 has a slot 31 on the side away from the limiting plate 23. Each slot 31 is equipped with three quick-connect female tubes 32. The right-angle tube 9 and the two pressure guiding tubes 8 are connected to the corresponding quick-connect female tubes 32 at the end near the slot 31.

[0025] Each pressure regulating box 7 has a socket 71 installed at one end near the arc-shaped positioning plate 3. Each pressure regulating box 7 has three quick-connect male air tubes 72 installed on the side wall inside the socket 71. Each pressure regulating box 7 has a control nozzle 73 installed on the side wall. Two pressure regulating boxes 7 are vertically distributed on the platform 1 and correspond to two adjacent arc-shaped positioning plates 3. Each control nozzle 73 is connected to the controller 12 through a hose.

[0026] Both the main pressure guide tube 8 and the right-angle tube 9 are sealed by the quick-connect female endotracheal tube 32, preventing any change in their internal pressure. The insert 71 can be inserted into the slot 31. The controller 12 can then control the air rod 61 to push the pressure regulating box 7, causing the insert 71 to insert into the corresponding slot 31. This allows the quick-connect male endotracheal tube 72 to be inserted into the quick-connect female endotracheal tube 32. The controller 12 then controls the air pressure in the main pressure guide tube 8 and the right-angle tube 9 via the hose and control nozzle 73. This is achieved by installing the measuring tube a and the inner arc-shaped plate b on the first side. On the arc-shaped positioning plate 3, rotating to the second side increases the pressure inside the pressure guiding main pipe 8 and the right-angle pipe 9 through the pressure regulating box 7, thereby fixing the measuring pipe a and ensuring a tight connection between the inner arc-shaped piece b and the measuring pipe a. Rotating to the third side allows for welding, and the pressure inside the pressure guiding main pipe 8 and the right-angle pipe 9 is reduced through the pressure regulating box 7, thereby loosening the measuring pipe a and the inner arc-shaped piece b. Rotating to the fourth side allows the loosened measuring pipe a and the inner arc-shaped piece b to be removed, achieving continuous welding production without manual operation, which is more efficient and safer.

[0027] Reference Figure 1 and Figure 4 The mobile welding mechanism includes two upright plates 4 symmetrically fixed on the platform 1. Each upright plate 4 has a vertical groove 41 through its side wall. Two vertical slide rods 42 are symmetrically installed in each vertical groove 41. A vertical cylinder slide plate 43 is installed on each of the two vertical slide rods 42 on the same side. A guide rail plate 44 is installed at the end of each vertical cylinder slide plate 43 near the arc-shaped positioning plate 3. A horizontal groove 45 is opened on the inner side of each guide rail plate 44. A horizontal slide rod 46 is installed in each horizontal groove 45. A horizontal cylinder slide plate 47 is slidably installed on each horizontal slide rod 46. The control ends of the vertical cylinder slide plate 43 and the horizontal cylinder slide plate 47 are connected to the controller 12 through a hose.

[0028] A positioning frame 5 is installed on both horizontal cylinder slide plates 47. Two positioning slide rods 51 are symmetrically installed inside the positioning frame 5. A cylinder base 52 is installed on both positioning slide rods 51. A welding machine 53 is installed on the cylinder base 52. The welding needle of the welding machine 53 extends to the bottom of the cylinder base 52. The welding needle of the welding machine 53 is located above the corresponding arc-shaped positioning plate 3. The welding machine 53 is electrically connected to the controller 12. The cylinder base 52 is connected to the controller 12 through a hose.

[0029] The controller 12 can drive the vertical cylinder slide plate 43 to move the guide rail plate 44 up and down, which in turn enables the two horizontal cylinder slide plates 47 to move up and down. The controller 12 can also control the two horizontal cylinder slide plates 47 to move horizontally on the horizontal slide bar 46, which in turn enables the positioning frame 5 to move horizontally with the horizontal cylinder slide plates 47 and to move up and down. This allows the cylinder base 52 to drive the welding machine 53 to move in three dimensions, and the welding machine 53 can perform multi-point welding on the outer surface of the inner arc-shaped piece b through the welding needle.

[0030] When the platform 1 is installed adjacent to the external feeding robot arm and the discharging robot arm, the feeding robot arm will put the measuring tube a on the arc-shaped positioning plate 3, so that the hole of the measuring tube a is fitted on the right-angle tube 9 and the locking post 91, and the feeding robot arm will cover the measuring tube a with the inner arc-shaped piece b, so that the hole of the inner arc-shaped piece b is fitted on the right-angle tube 9 and the locking post 91, thus positioning the measuring tube a and the inner arc-shaped piece b.

[0031] The controller 12 controls the steering motor 2 to drive the turntable 21 to rotate counterclockwise, which causes the fixed rod 22 and the limiting plate 23 to drive the arc-shaped positioning plate 3 to rotate. This causes the arc-shaped positioning plate 3 to rotate 90 degrees counterclockwise, that is, to rotate the arc-shaped positioning plate 3 containing the measuring tube a and the inner arc-shaped piece b to one side of the first pressure regulating box 7. Then the controller 12 controls the air rod 61 to extend, so that the insert 71 on the pressure regulating box 7 is inserted into the slot 31 on the arc-shaped positioning plate 3. This causes the quick-connect male of the air tube 72 to be inserted into the quick-connect female of the air tube 32. The controller 12 increases the pressure in the first pressure regulating box 7 through the hose and the control nozzle 73, which increases the pressure in the main pressure guiding pipe 8 and the right-angle pipe 9. Then the controller 12 controls the air rod 61 to reset, which drives the pressure regulating box 7 to reset. This causes the quick-connect male of the air tube 72 to separate from the quick-connect female of the air tube 32, and the seal in the main pressure guiding pipe 8 and the right-angle pipe 9 is in a high-pressure state.

[0032] When the pressure inside the right-angle tube 9 increases, the piston rod 93 inside the arc-shaped locking hole 92 moves and pushes the arc-shaped locking rod 94 outward and presses against the inner arc-shaped plate b, so that the inner arc-shaped plate b is pressed against the measuring tube a. When the pressure inside the pressure guiding main tube 8 increases, the pressure inside the pressure guiding branch tube 81 increases, and the piston plate 83 pushes the positioning rod 82 so that the pressing plate 84 moves down and presses against the inner wall of the measuring tube a, so that the measuring tube a is fixed on the arc-shaped positioning plate 3.

[0033] The controller 12 controls the steering motor 2 to drive the turntable 21 to rotate counterclockwise, which causes the fixed rod 22 and the limit plate 23 to drive the arc-shaped positioning plate 3 to rotate. This causes the arc-shaped positioning plate 3 to rotate 90 degrees counterclockwise, that is, to rotate the arc-shaped positioning plate 3 containing the measuring tube a and the inner arc-shaped piece b to one side of the second pressure regulating box 7. The controller 12 controls the air rod 61 to extend, so that the sleeve 71 on the pressure regulating box 7 is inserted into the slot 31 on the arc-shaped positioning plate 3, which causes the quick-connect male of the air pipe 72 to be inserted into the quick-connect female of the air pipe 32. Then, the controller 12 controls the vertical cylinder slide plate 43 to drive the guide rail plate 44 to move up and down, and controls the two horizontal cylinder slide plates 47 to drive the positioning frame 5 to move horizontally, and controls the cylinder base 52 to move within the positioning frame 5, so that the welding needle of the welding machine 53 can move freely in three dimensions to change the welding position and weld the measuring tube a and the inner arc-shaped piece b.

[0034] After welding, the controller 12 reduces the pressure inside the second pressure regulating box 7 through the hose and control nozzle 73, which reduces the pressure inside the pressure guiding main pipe 8 and the right-angle pipe 9. Then, the controller 12 controls the air rod 61 to reset, which drives the pressure regulating box 7 to reset, thus separating the quick-connect male connector 72 and the quick-connect female connector 32 of the air hose, and the seal inside the pressure guiding main pipe 8 and the right-angle pipe 9 is in a negative pressure state.

[0035] When the pressure inside the right-angle tube 9 decreases, the piston rod 93 inside the arc-shaped locking hole 92 moves and pulls the arc-shaped locking rod 94 inward to retract into the arc-shaped locking hole 92, releasing the inner arc-shaped piece b from the measuring tube a. When the pressure inside the pressure guiding main tube 8 decreases, the pressure inside the pressure guiding branch tube 81 decreases, and the piston plate 83 pulls the positioning rod 82, causing the pressing plate 84 to move upward to release the measuring tube a. The controller 12 controls the steering motor 2 to drive the turntable 21 to rotate counterclockwise, causing the fixing rod 22 and the limiting plate 23 to drive the arc-shaped positioning plate 3 to rotate, thus causing the arc-shaped positioning plate 3 to rotate 90 degrees counterclockwise, that is, the arc-shaped positioning plate 3 containing the measuring tube a and the inner arc-shaped piece b is rotated to the discharge robot arm. The discharge robot arm then unloads the welded measuring tube a and the inner arc-shaped piece b from the arc-shaped positioning plate 3 and discharges them. Moreover, the four arc-shaped positioning plates 3 can continuously perform feeding, transfer, fixing, welding and discharge of measuring tube a and the inner arc-shaped piece b, increasing production efficiency.

Claims

1. An automatic welding device for measuring the arc-shaped sheet inside a tube, comprising a platform (1), characterized in that, A frame (11) is installed on the platform (1). A steering motor (2) is installed on the frame (11). A turntable (21) is installed on the shaft of the steering motor (2). Four fixing rods (22) are symmetrically installed on the side wall of the turntable (21). A limit plate (23) is installed on the end of each fixing rod (22) away from the turntable (21). An arc-shaped positioning plate (3) is fixedly installed on the side of each limit plate (23) away from the fixing rod (22). A right-angle tube (9) is inserted into the upper arc surface of each arc-shaped positioning plate (3). The upper end of each right-angle tube (9) extends to the top of the arc-shaped positioning plate (3) and is sealed with a locking post (91). A plurality of ring-shaped symmetrical openings are provided on the side wall of each locking post (91) that penetrate to the bottom of the locking post (91). An arc-shaped locking hole (92) is provided, and a piston rod (93) is slidably installed in each arc-shaped locking hole (92). An arc-shaped locking rod (94) is installed on each piston rod (93). The end of each arc-shaped locking rod (94) away from the piston rod (93) extends to the outside of the locking rod (91). A movable welding mechanism is installed on the platform (1). Two brackets (6) are installed on the platform (1). A gas rod (61) is installed on the side of each bracket (6) away from the arc-shaped positioning plate (3). The movable end of the gas rod (61) passes through the bracket (6) and is fitted with a pressure regulating box (7). A controller (12) is installed on the platform (1). The steering motor (2) is electrically connected to the controller (12). The control end of the gas rod (61) is connected to the controller (12) through a hose. Each of the arc-shaped positioning plates (3) is embedded with a pressure guiding main pipe (8). Multiple pressure guiding branch pipes (81) are symmetrically inserted at equal intervals on the bottom side wall of each pressure guiding main pipe (8). A positioning rod (82) is slidably inserted at the lower end of each pressure guiding branch pipe (81). The upper end of each positioning rod (82) extends into the pressure guiding branch pipe (81) and is fitted with a piston plate (83). The lower ends of two symmetrical positioning rods (82) extend to the bottom of the arc-shaped positioning plate (3) and are jointly fixedly installed with a clamping plate (84).

2. The automatic welding equipment for measuring the arc-shaped sheet inside a tube according to claim 1, characterized in that, Each of the arc-shaped positioning plates (3) has a slot (31) on the side away from the limiting plate (23). Each slot (31) is equipped with three quick-connect female tubes (32). The right-angle tube (9) and the two pressure guiding tubes (8) are connected to the corresponding quick-connect female tubes (32) at the end near the slot (31).

3. The automatic welding equipment for measuring the arc-shaped sheet inside a tube according to claim 1, characterized in that, Each pressure regulating box (7) has a sleeve (71) installed at one end near the arc-shaped positioning plate (3). Each pressure regulating box (7) has three quick-connect male endotracheal tubes (72) installed on the side wall inside the sleeve (71). Each pressure regulating box (7) has a control nozzle (73) installed on the side wall. Two pressure regulating boxes (7) are vertically distributed on the platform (1) and correspond to two adjacent arc-shaped positioning plates (3). Each control nozzle (73) is connected to the controller (12) through a hose.

4. The automatic welding equipment for measuring the arc-shaped sheet inside a tube according to claim 1, characterized in that, The mobile welding mechanism includes two upright plates (4) symmetrically fixed on the platform (1). Each upright plate (4) has a vertical groove (41) through it on its side wall. Each vertical groove (41) has two vertical slide rods (42) symmetrically installed in it. The two vertical slide rods (42) on the same side are both equipped with a vertical cylinder slide plate (43). Each vertical cylinder slide plate (43) has a guide rail plate (44) installed at one end near the arc positioning plate (3). Each guide rail plate (44) has a horizontal groove (45) on its inner side. Each horizontal groove (45) has a horizontal slide rod (46) installed in it. Each horizontal slide rod (46) has a horizontal cylinder slide plate (47) slidably installed on it. The control ends of the vertical cylinder slide plate (43) and the horizontal cylinder slide plate (47) are connected to the controller (12) through a hose.

5. The automatic welding equipment for measuring the arc-shaped sheet inside a tube according to claim 4, characterized in that, A positioning frame (5) is installed on both horizontal cylinder slide plates (47). Two positioning slide rods (51) are symmetrically installed in the positioning frame (5). A cylinder base (52) is installed on both positioning slide rods (51). A welding machine (53) is installed on the cylinder base (52). The welding needle of the welding machine (53) extends to the bottom of the cylinder base (52). The welding needle of the welding machine (53) is located above the corresponding arc-shaped positioning plate (3). The welding machine (53) is electrically connected to the controller (12). The cylinder base (52) is connected to the controller (12) through a hose.

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