An automatic welding equipment for internal and external longitudinal seams

Abstract

The present invention discloses an automated welding device for internal and external longitudinal seams, characterized in that it further comprises a base, an internal longitudinal seam welding mechanism and an external longitudinal seam welding mechanism disposed on the base; the internal longitudinal seam welding mechanism and the external longitudinal seam welding mechanism comprise tooling for placing a workpiece, a dedicated internal longitudinal seam welding machine for welding the internal longitudinal seam of the workpiece, and a dedicated external longitudinal seam welding machine for welding the external longitudinal seam of the workpiece. The invention automatically detects and aligns the position of the workpiece weld seam, positions the weld seam after alignment, and automatically welds the weld seam after positioning is complete. By configuring the internal longitudinal seam welding mechanism and the external longitudinal seam welding mechanism, the external and internal longitudinal seams of a cylindrical workpiece are automatically welded, with a high degree of automation, high processing efficiency, precise welding position, and high welding quality.

Description

Technical Field

[0001] The invention relates to internal and external longitudinal seam welding equipment, in particular to internal and external longitudinal seam automatic welding equipment. Background Art

[0002] In existing technology, cylindrical workpieces such as pipes and tanks are manufactured by welding metal sheets or strips after being rolled and formed. To ensure weld strength, both the outer and inner longitudinal seams of the cylindrical workpieces need to be welded. This process is often performed manually, but manual welding is inefficient, with uncontrollable weld quality and limited technical skills. Therefore, an automated internal and external longitudinal seam welding device is proposed. Summary of the Invention

[0003] The purpose of the present invention is to solve the above problems and to provide an automatic welding device for internal and external longitudinal seams.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: an automatic welding equipment for internal and external longitudinal seams, including a control system; it is characterized in that it also includes a base, an internal longitudinal seam welding mechanism and an external longitudinal seam welding mechanism placed on the base; the internal longitudinal seam welding mechanism and the external longitudinal seam welding mechanism include a tooling for placing a workpiece, a special machine for welding the internal longitudinal seam of the workpiece, and a special machine for welding the external longitudinal seam of the workpiece; the tooling includes a fixed seat, a rotating roller movably mounted on the fixed seat, a positioning block mounted on the rotating roller for positioning the workpiece on the rotating roller, a guide shaft movably mounted on the fixed seat, a movable seat slidably mounted on the guide shaft, a pressing block mounted on the movable seat for pressing the workpiece and positioning and pressing the workpiece position, and a cylinder mounted on the fixed seat and connected to the movable seat to drive the movable seat to move, and also includes a flux pad box arranged under the tooling.

[0005] Further preferably, the outer longitudinal seam welding mechanism further includes lifting fixtures provided on both sides of the fixture for lifting and positioning the workpiece.

[0006] Further preferably, the lifting tooling includes a lifting seat, a transverse moving mechanism placed on the lifting seat, a longitudinal moving mechanism placed on the transverse moving mechanism, a lifting claw placed on the longitudinal moving mechanism, a positioning block 2 arranged on the lifting claw for limiting the position of the workpiece, and a padding device for supporting the workpiece.

[0007] Further preferably, the liner device comprises a copper seat for bearing weight and conducting electricity and a ceramic pad arranged on the copper seat for blocking solder and connecting to the molten pool.

[0008] Further preferably, the longitudinal moving mechanism and the transverse moving mechanism are both servo transmission systems composed of a servo motor, a screw rod, and a nut seat.

[0009] Further preferably, the special machine for welding the outer longitudinal seam includes a column, a beam slidably mounted on the column, a welding movable frame slidably mounted on the beam, a welding frame slidably mounted on the welding movable frame, a manual adjustment mechanism mounted on the welding frame, and a welding machine mounted on the manual adjustment mechanism.

[0010] Further preferably, the manual adjustment mechanism includes a transverse adjustment frame installed on the welding frame, a longitudinal adjustment frame slidably installed on the transverse adjustment frame, an adjustment screw installed on the transverse adjustment frame and the longitudinal adjustment frame, and an adjustment handwheel installed at one end of the adjustment screw, the longitudinal adjustment frame is movably connected to the adjustment screw installed on the transverse adjustment frame, and the welding machine is movably connected to the adjustment screw installed on the longitudinal adjustment frame.

[0011] Further preferably, it also includes a detection and adjustment mechanism for detecting the position of the workpiece weld and automatically adjusting the workpiece position according to the detection result so that the workpiece weld is in a set position; the detection and adjustment mechanism includes a detection frame, a laser transmitter installed on the detection frame for emitting a reference line, a detection cylinder installed on the detection frame, and a CCD camera installed on the detection cylinder.

[0012] Further preferably, the adjustment mechanism includes an adjustment frame, an adjustment frame slidably mounted on the adjustment frame, an adjustment roller movably mounted on the adjustment frame, an adjustment motor mounted on the adjustment frame and transmission-connected to the adjustment roller, and a servo transmission system arranged on the adjustment frame for driving the adjustment frame to move; a contact sensor is also mounted on the adjustment roller.

[0013] Further preferably, it also includes an angle adjustment mechanism for adjusting the angular position of the workpiece, the angle adjustment mechanism comprising angle adjustment frames arranged on both sides of the tooling, an electric hydraulic cylinder installed on the angle adjustment frame, and a ball head installed at the end of the piston rod of the electric hydraulic cylinder.

[0014] The beneficial effects of the present invention are as follows: through the setting of the device, the detection and alignment of the weld position of the workpiece are automatically completed, the weld position is positioned after alignment, and the weld is automatically welded after positioning is completed. Through the setting of the inner longitudinal seam welding mechanism and the outer longitudinal seam welding mechanism, the outer longitudinal seam and the inner longitudinal seam of the cylindrical workpiece are automatically welded, with a high degree of automation, high processing efficiency, accurate welding position and high welding quality;

[0015] By detecting the setting of the adjustment mechanism, the workpiece is driven to rotate by the adjustment mechanism to adjust the weld position. At the same time, through the setting of the CCD camera, real-time shooting is carried out to align the weld with the set weld position. The captured image is transmitted to the control system in real time and compared with the standard image set in advance in the control system to determine the weld position. When the weld is in the set weld position, the laser is turned on to emit the set laser line. At this time, the CCD camera is used to shoot again. The captured image is compared with the set standard image again to determine whether there is a deviation between the weld and the laser line as a reference. If there is a deviation, the angle of the workpiece is fine-tuned according to the direction of the deviation by controlling the angle adjustment mechanism, thereby ensuring the accuracy of the welding position and improving the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the outer longitudinal seam welding mechanism of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the tooling in the present invention;

[0019] Figure 4 It is a structural schematic diagram of the lifting tool in the present invention;

[0020] Figure 5 This is a schematic structural diagram of the special machine for welding longitudinal seams in the present invention;

[0021] Figure 6 In the present invention Figure 5 Schematic diagram of the local cross-section structure;

[0022] Figure 7 In the present invention Figure 5 Schematic diagram of the local structure;

[0023] Figure 8 This is a schematic structural diagram of the internal longitudinal seam welding machine of the present invention;

[0024] Figure 9 This is a partial structural diagram of the inner longitudinal seam welding machine of the present invention;

[0025] Figure 10 It is a partial structural schematic diagram of another embodiment of the present invention;

[0026] Figure 11 It is a structural schematic diagram of another embodiment of the present invention;

[0027] Figure 12 It is a structural diagram of the detection mechanism of the present invention;

[0028] Figure 13It is a structural schematic diagram of the adjustment mechanism and the angle adjustment mechanism in the present invention;

[0029] Figure 14 It is a structural schematic diagram of the angle adjustment mechanism in the present invention.

[0030] Legend: 1. Base; 2. Internal longitudinal seam welding mechanism; 21. Internal longitudinal seam welding machine; 211. Internal longitudinal seam frame; 212. Internal longitudinal seam movable frame; 213. Motor 3; 214. Internal longitudinal seam longitudinal movable frame; 215. Internal longitudinal seam transverse movable frame; 3. External longitudinal seam welding mechanism; 31. External longitudinal seam welding machine; 311. Column; 312. Crossbeam; 313. Welding movable frame; 314. Welding frame; 315. Manual adjustment mechanism; 316. Welding machine; 32. Rack; 33. Motor 1; 34. Gear; 35. Motor 2; 36. Screw; 37. Transverse adjustment frame; 371. Longitudinal adjustment frame; 372. Adjustment screw; 373. Adjustment handwheel; 4. Tooling; 41. Fixture Fixed seat; 42. Rotating roller; 43. Positioning block 1; 44. Guide shaft; 45. Moving seat; 46. Pressing block; 47. Cylinder; 5. Flux pad box; 6. Lifting tool; 61. Lifting seat; 62. Horizontal moving mechanism; 63. Longitudinal moving mechanism; 64. Lifting claw; 65. Positioning block 2; 66. Copper seat; 67. Ceramic pad; 7. Detection mechanism; 71. Detection frame; 72. Laser emitter; 73. Detection cylinder; 74. CCD camera; 8. Adjustment mechanism; 81. Adjustment frame; 82. Adjustment frame; 83. Adjustment roller; 84. Adjustment motor; 85. Contact sensor; 9. Angle adjustment mechanism; 91. Angle adjustment frame; 92. Electric hydraulic cylinder; 93. Ball head. DETAILED DESCRIPTION

[0031] Next, we will further explain the automatic welding equipment for internal and external longitudinal seams of the present invention with reference to the accompanying drawings.

[0032] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0033] In the present invention, unless otherwise specified or limited, the terms "connect," "fix," etc. should be understood broadly. For example, "fix" can refer to a fixed connection, a detachable connection, or an integral connection; it can also refer to a mechanical connection, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0034] See Figures 1-14As shown in, an internal and external longitudinal seam automated welding equipment includes a control system; it is characterized in that it also includes a base 1, an internal longitudinal seam welding mechanism 2 and an external longitudinal seam welding mechanism 3 placed on the base 1; the internal longitudinal seam welding mechanism 2 and the external longitudinal seam welding mechanism 3 include a tool 4 for placing a workpiece, an internal longitudinal seam welding machine 21 for welding the internal longitudinal seam of the workpiece, and an external longitudinal seam welding machine 31 for welding the external longitudinal seam of the workpiece; the tool 4 includes a fixed seat 41, a rotating roller 42 movably mounted on the fixed seat 41, a positioning block 43 mounted on the rotating roller 42 for positioning the position of the workpiece on the rotating roller 42, a guide shaft 44 movably mounted on the fixed seat 41, a movable seat 45 slidably mounted on the guide shaft 44, a pressing block 46 mounted on the movable seat 45 for pressing the workpiece and positioning and pressing the workpiece position, and a cylinder 47 mounted on the fixed seat 41 and connected to the movable seat 45 to drive the movable seat 45 to move, and also includes a flux pad box 5 arranged below the tool 4;

[0035] The flux liner box 5 contains submerged arc flux, which can be used as a backing protection during the welding process to prevent burn-through and also help the weld to form;

[0036] The tooling 4 is provided to support the workpiece and pre-position the workpiece; the rotating roller 42 is provided to facilitate the rotation of the workpiece on the rotating roller 42, thereby reducing the resistance during rotation;

[0037] By setting the positioning block 43, one end of the workpiece is positioned, and by setting the pressing block 46 and the cylinder 47, the cylinder 47 drives the pressing block 46 to move and cooperate with the positioning block to press the workpiece, thereby limiting the position of the workpiece;

[0038] Through the setting of this device, the detection and alignment of the weld position of the workpiece are automatically completed, the weld position is positioned after alignment, and the weld is automatically welded after positioning is completed. Through the setting of the inner longitudinal seam welding mechanism 2 and the outer longitudinal seam welding mechanism 3, the outer longitudinal seam and the inner longitudinal seam of the cylindrical workpiece are automatically welded, with a high degree of automation, high processing efficiency, precise welding position and high welding quality.

[0039] In one embodiment, the outer longitudinal seam welding mechanism 3 also includes a lifting tooling 6 arranged on both sides of the tooling 4 for lifting and positioning the workpiece; through the setting of the lifting tooling 6, it can be used to lift the workpiece on the tooling 4 when in use, so as to meet the needs of workpieces of different diameters.

[0040] In one embodiment, the lifting tool 6 includes a lifting seat 61, a lateral moving mechanism 62 placed on the lifting seat 61, a longitudinal moving mechanism 63 placed on the lateral moving mechanism 62, a lifting claw 64 placed on the longitudinal moving mechanism 63, a positioning block 65 provided on the lifting claw 64 to limit the position of the workpiece, and a pad device to support the workpiece;

[0041] The second positioning block 65 is provided to position the workpiece when the lifting claw 64 is inserted into the workpiece.

[0042] The liner device includes a copper seat 66 for bearing weight and conducting electricity, and a ceramic pad 67 disposed on the copper seat 66 for blocking solder and connecting to the molten pool;

[0043] By setting a liner device, the liner device is composed of a copper seat 66 and a ceramic pad 67. The copper seat 66 is used for bearing weight and conducting electricity, and the ceramic pad 67 is used for blocking solder and connecting the molten pool.

[0044] In one embodiment, the longitudinal moving mechanism 63 and the transverse moving mechanism 62 are both servo transmission systems composed of a servo motor, a screw rod 36, and a nut seat; using the servo transmission system as a driver, the transmission position is accurate and reliable.

[0045] In one embodiment, the outer longitudinal seam welding machine 31 includes a column 311, a beam 312 slidably mounted on the column 311, a welding movable frame 313 slidably mounted on the beam 312, a welding frame 314 slidably mounted on the welding movable frame 313, a manual adjustment mechanism 315 mounted on the welding frame 314, and a welding machine 316 mounted on the manual adjustment mechanism 315.

[0046] The column 311 is equipped with a servo transmission system for driving the crossbeam 312 to move up and down; the crossbeam 312 is equipped with a rack 32, and the welding movable frame 313 is equipped with a motor 1 33, which is connected to a gear 34 that meshes with the rack 32; the welding movable frame 313 is equipped with a motor 2 35, which is transmission-connected to a screw rod 36, which is movably connected to the welding frame 314;

[0047] The servo drive system provided on the column 311 drives the beam 312 to move up and down when the beam 312 moves up and down. When the beam 312 moves laterally, the motor 33 drives the gear 34 to rotate. When the gear 34 rotates, it engages with the rack 32 to drive the welding movable frame 313 to move on the beam 312.

[0048] When the welding frame 314 moves up and down, the motor 2 35 drives the screw rod 36 to rotate. When the screw rod 36 rotates, it drives the welding frame 314 to move up and down through the spiral cooperation with the welding frame 314.

[0049] In one embodiment, the manual adjustment mechanism 315 includes a transverse adjustment frame 37 mounted on the welding frame 314, a longitudinal adjustment frame 371 slidably mounted on the transverse adjustment frame 37, an adjustment screw 372 mounted on the transverse adjustment frame 37 and the longitudinal adjustment frame 371, and an adjustment handwheel 373 mounted on one end of the adjustment screw 372. The longitudinal adjustment frame 371 is movably connected to the adjustment screw 372 mounted on the transverse adjustment frame 37, and the welding machine 316 is movably connected to the adjustment screw 372 mounted on the longitudinal adjustment frame 371.

[0050] Through the setting of the manual adjustment mechanism 315, the up, down, left and right positions of the welding machine 316 can be fine-tuned. During manual adjustment, the adjustment hand wheel 373 is rotated, and the adjustment hand wheel 373 drives the adjustment screw rod 372. When the adjustment screw rod 372 rotates, it is adjusted up, down, left and right by screw cooperation with the longitudinal movable frame or the welding machine 316.

[0051] In one embodiment, the inner longitudinal seam welding machine 21 includes an inner longitudinal seam frame 211 mounted on the base 1, an inner longitudinal seam moving frame 212 slidably mounted on the inner longitudinal seam frame 211, a rack 32 mounted on the inner longitudinal seam frame 211, a motor 3 213 mounted on the inner longitudinal seam moving frame 212, a gear 34 mounted on the motor 3 213 and transmission-connected to the rack 32, an inner longitudinal seam longitudinal moving frame 214 slidably mounted on the inner longitudinal seam moving frame 212, a servo transmission system provided on the inner longitudinal seam moving frame 212 for driving the inner longitudinal seam longitudinal moving frame 214 to move up and down, an inner longitudinal seam transverse moving frame 215 slidably mounted on the inner longitudinal seam longitudinal moving frame 214, a servo transmission system provided on the inner longitudinal seam longitudinal moving frame 214 for driving the inner longitudinal seam transverse moving frame 215 to move transversely, and a welding machine 316 mounted on the inner longitudinal seam transverse moving frame 215;

[0052] When the inner longitudinal seam welding machine 316 moves forward and backward, the motor 3 213 is started and the gear 34 on the motor is driven to rotate. The gear 34 drives the inner longitudinal seam moving frame 212 to move on the inner longitudinal seam machine frame 211 through engagement with the rack 32. When moving up and down, the servo transmission system provided on the inner longitudinal seam moving frame 212 drives the inner longitudinal seam longitudinal moving frame 214 to move up and down; when moving horizontally, the servo transmission system provided on the inner longitudinal seam longitudinal moving frame 214 drives the inner longitudinal seam transverse moving frame 215 and the welding machine 316 to move horizontally.

[0053] In one embodiment, the machine further includes a detection and adjustment mechanism 8 for detecting the position of the workpiece weld and automatically adjusting the position of the workpiece according to the detection result so that the workpiece weld is in a set position; the detection and adjustment mechanism 8 includes a detection mechanism 7 and an adjustment mechanism 8; the detection mechanism 7 includes a detection frame 71, a laser emitter 72 mounted on the detection frame 71 for emitting a reference line, a detection cylinder 73 mounted on the detection frame 71, and a CCD camera 74 mounted on the detection cylinder 73; the adjustment mechanism 8 also includes an adjustment frame 81, an adjustment frame 82 slidably mounted on the adjustment frame 81, an adjustment roller 83 movably mounted on the adjustment frame 82, an adjustment motor 84 mounted on the adjustment frame 82 and transmission-connected to the adjustment roller 83, and a servo transmission system provided on the adjustment frame 81 for driving the adjustment frame 82 to move; the adjustment roller 83 is also mounted on the contact sensor 85;

[0054] By detecting the setting of the adjustment mechanism 8, the adjustment mechanism 8 drives the workpiece to rotate to adjust the weld position. At the same time, the CCD camera 74 is set to take pictures in real time to align the weld with the set weld position. The captured image is transmitted to the control system in real time and compared with the standard image set in advance in the control system to determine the weld position.

[0055] When locating the weld seam, the standard position image of the weld seam is set in the control system in advance. The weld seam position can also be determined by the laser line emitted by the laser emitter 72 as the reference line of the weld seam in the standard image.

[0056] When adjusting the circumferential position of the workpiece, the servo transmission system drives the adjustment frame 82 to move forward. During the process of the adjustment frame 82 driving the adjustment roller 83 to move forward, when the contact sensor 85 contacts the workpiece, it sends a signal to the control system. The control system controls the servo transmission system to stop the action. At this time, the adjustment roller 83 is in contact with the surface of the workpiece, and then the adjustment motor 84 is controlled to start. The adjustment motor 84 drives the adjustment roller 83 to rotate. The adjustment roller 83 is driven to rotate by the friction between the adjustment roller and the workpiece until the weld moves to the set position and stops. The control system controls the servo system to drive the adjustment roller 83 to reset.

[0057] In one embodiment, an angle adjustment mechanism 9 for adjusting the angular position of the workpiece is further included, wherein the angle adjustment mechanism 9 comprises angle adjustment frames 91 provided on both sides of the tooling 4, an electric hydraulic cylinder 92 installed on the angle adjustment frame 91, and a ball head 93 installed at the end of the piston rod of the electric hydraulic cylinder 92;

[0058] Through the setting of the angle adjustment mechanism 9, when there is a deviation between the weld on the workpiece itself and the axis of the workpiece, when the weld is in the set weld position, the set laser line is emitted by the laser, and then the CCD camera 74 is used to shoot again. The shot image is compared with the set standard image again to determine whether there is a deviation between the weld and the laser line used as a reference. If there is a deviation, the angle adjustment mechanism 9 is controlled to fine-tune the angle of the workpiece according to the deflection direction. During adjustment, the electric hydraulic cylinder 92 on the side with the deviation is started, and the electric hydraulic cylinder 92 controls the piston rod and the ball head 93 to extend, and the workpiece is pushed by the ball head 93. Real-time detection is performed during the pushing process. When the weld is aligned with the laser line, the pushing is stopped. At this time, the weld position is accurate, thereby ensuring the accuracy of the welding position and improving the welding quality.

[0059] The ball head 93 is provided so as to achieve better contact between the ball head and the workpiece without any sharp corners at the contact position.

[0060] At the same time, the workpiece can be better clamped after the workpiece angle is adjusted. Elastic flexible pads can be added to the positioning block 1 43 and the clamping block 46 to adapt to the two ends of the workpiece with an inclined angle. At the same time, a flexible pad can also be added to the positioning block 2 65 on the lifting claw 64.

[0061] When the present invention is used:

[0062] When automatically welding the outer longitudinal seam of a workpiece: first, a worker moves the workpiece onto the rotating roller 42 of the tooling 4 of the outer longitudinal seam welding mechanism 3 by means of a lifting device or other equipment;

[0063] Then the control system controls the laser to emit a laser line, controls the detection cylinder 73 to start, and the detection cylinder 73 drives the video transmitter to move forward to the set position and turns on the CCD camera 74. The CCD camera 74 takes pictures and transmits the pictures to the control system, and compares them with the standard pictures set in the control system. If the weld is not in the set position, the control system controls the servo transmission system to drive the adjustment frame 82 to move forward. During the process of the adjustment frame 82 driving the adjustment roller 83 to move forward, when the contact sensor 85 contacts the workpiece, it sends a signal to the control system, and the control system controls the servo transmission system to stop the action. At this time, the adjustment roller 83 is in contact with the surface of the workpiece, and then controls the adjustment motor 84 to start. The adjustment motor 84 drives the adjustment roller 83 to rotate, and the adjustment roller 83 is driven to rotate by the friction between the adjustment roller 83 and the workpiece.

[0064] During the process of the workpiece being rotated by the adjusting roller 83, real-time photography is performed by the CCD camera 74. When the weld moves to the set position, the control system stops the rotation and controls the adjusting frame 82 to reset.

[0065] At this time, the image captured by the CCD camera 74 is compared with the set standard image to determine whether there is an angular deviation between the weld and the standard laser line. If there is an angular deviation, the control system controls the angle adjustment mechanism 9 to fine-tune the angle of the workpiece according to the deflection direction. During adjustment, the electric hydraulic cylinder 92 on the side with the deviation is activated. The electric hydraulic cylinder 92 controls the piston rod and ball head 93 to extend, and the ball head 93 pushes the workpiece. Real-time detection is performed during the pushing process. When the weld is aligned with the laser line, the pushing stops.

[0066] At this time, if the diameter of the workpiece does not need to be lifted, the cylinder 47 is controlled to push out the pressing block 46, and the pressing block 46 presses the workpiece tightly to fix the workpiece, and the positioning of the workpiece is completed at this time;

[0067] If the workpiece needs to be lifted, the control system controls the lifting fixtures 6 on both sides of the workpiece to start, and drives the lifting claws 64 to be inserted into the workpiece at the same time through the lateral movement mechanism 62 until the second positioning block 65 abuts against the end of the workpiece and the inner wall of the workpiece contacts the lining device to complete the fixation of the workpiece;

[0068] Then the control system controls the adjustment mechanism 8 to reset; then the control system controls the longitudinal movement mechanism 63 to drive the workpiece to move upward to the set position;

[0069] Then the control system controls the outer longitudinal seam welding machine 31 to drive the welding machine 316 to weld the outer longitudinal seam of the workpiece;

[0070] After welding is completed, the tooling 6 is lifted and the workpiece is placed on the rotating roller 42 or the cylinder 47 drives the pressing block 46 to reset. At this time, the staff can move the workpiece to the next process or move it to the rotating roller 42 of the tooling 4 of the inner longitudinal seam welding mechanism 2;

[0071] When welding the inner longitudinal seam of a workpiece:

[0072] Similarly, the weld position is detected by the detection mechanism 7, and the adjustment mechanism 8 is controlled to rotate the workpiece until the weld position is at the set position. The angle of the workpiece is adjusted according to the laser line. After the weld is aligned with the laser line, the control system controls the cylinder 47 to drive the pressing block 46 to press the workpiece tightly and complete the fixation of the workpiece.

[0073] After the workpiece is fixed, the control system controls the inner longitudinal seam welding machine 21 to drive the welding machine 316 to weld the inner longitudinal seam of the workpiece according to the set path. After the welding is completed, the control cylinder 47 drives the clamping block 46 to reset, and then the worker operates the lifting equipment to remove the workpiece with the inner and outer longitudinal seams welded, and the welding work of the workpiece is completed.

[0074] The protection scope of the present invention is not limited to the above embodiment and its variations. Conventional modifications and replacements made by those skilled in the art based on the contents of this embodiment fall within the protection scope of the present invention.

Claims

1. An automatic welding device for internal and external longitudinal seams, including a control system; characterized in that The machine also includes a base, an inner longitudinal seam welding mechanism and an outer longitudinal seam welding mechanism placed on the base; the inner longitudinal seam welding mechanism and the outer longitudinal seam welding mechanism include a tool for placing a workpiece, an inner longitudinal seam welding machine for welding the inner longitudinal seam of the workpiece, and an outer longitudinal seam welding machine for welding the outer longitudinal seam of the workpiece; the tool includes a fixed seat, a rotating roller movably mounted on the fixed seat, a positioning block mounted on the rotating roller for positioning the workpiece on the rotating roller, a guide shaft movably mounted on the fixed seat, a movable seat slidably mounted on the guide shaft, a pressing block mounted on the movable seat for pressing the workpiece to position the workpiece, and a cylinder mounted on the fixed seat and connected to the movable seat to drive the movable seat to move; the machine also includes a flux pad box arranged below the tool; The machine also includes a detection and adjustment mechanism for detecting the position of the workpiece weld and automatically adjusting the position of the workpiece according to the detection result so that the workpiece weld is at a set position; the detection and adjustment mechanism includes a detection mechanism for photographing and aligning the weld with the set weld position to determine the weld position and an adjustment mechanism for automatically adjusting the position of the workpiece according to the detection result so that the workpiece weld is at the set position; the detection mechanism includes a detection frame, a laser transmitter mounted on the detection frame for emitting a reference line, a detection cylinder mounted on the detection frame, and a CCD camera mounted on the detection cylinder; The adjustment mechanism includes an adjustment frame, an adjustment frame slidably mounted on the adjustment frame, an adjustment roller movably mounted on the adjustment frame, an adjustment motor mounted on the adjustment frame and connected to the adjustment roller, and a servo transmission system arranged on the adjustment frame for driving the adjustment frame to move; the adjustment roller is also equipped with a contact sensor; It also includes an angle adjustment mechanism for adjusting the angular position of the workpiece so that the weld is aligned with the laser line when the weld on the workpiece itself is deviated from the laser line serving as a reference. The angle adjustment mechanism includes an angle adjustment frame arranged on both sides of the tooling, an electric hydraulic cylinder installed on the angle adjustment frame, and a ball head installed at the end of the piston rod of the electric hydraulic cylinder.

2. The automatic welding equipment for internal and external longitudinal seams according to claim 1, characterized in that: The outer longitudinal seam welding mechanism also includes lifting fixtures arranged on both sides of the fixture for lifting and positioning the workpiece.

3. The automatic welding equipment for internal and external longitudinal seams according to claim 2, characterized in that: The lifting tooling includes a lifting seat, a transverse moving mechanism placed on the lifting seat, a longitudinal moving mechanism placed on the transverse moving mechanism, a lifting claw placed on the longitudinal moving mechanism, a positioning block 2 arranged on the lifting claw to limit the position of the workpiece, and a padding device that supports the workpiece.

4. The automatic welding equipment for internal and external longitudinal seams according to claim 3, characterized in that: The lining device comprises a copper seat for bearing weight and conducting electricity and a ceramic pad arranged on the copper seat for blocking solder and connecting the molten pool.

5. The automatic welding equipment for internal and external longitudinal seams according to claim 3, characterized in that: The longitudinal moving mechanism and the transverse moving mechanism are both servo transmission systems composed of a servo motor, a screw rod, and a nut seat.

6. The automatic welding equipment for internal and external longitudinal seams according to claim 1, characterized in that: The external longitudinal seam welding machine includes a column, a beam slidably mounted on the column, a welding movable frame slidably mounted on the beam, a welding frame slidably mounted on the welding movable frame, a manual adjustment mechanism mounted on the welding frame, and a welding machine mounted on the manual adjustment mechanism.

7. The automatic welding equipment for internal and external longitudinal seams according to claim 6, characterized in that: The manual adjustment mechanism includes a transverse adjustment frame installed on the welding frame, a longitudinal adjustment frame slidably installed on the transverse adjustment frame, an adjustment screw installed on the transverse adjustment frame and the longitudinal adjustment frame, and an adjustment handwheel installed at one end of the adjustment screw. The longitudinal adjustment frame is movably connected to the adjustment screw installed on the transverse adjustment frame, and the welding machine is movably connected to the adjustment screw installed on the longitudinal adjustment frame.

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