Automatic welding equipment for internal and external longitudinal joints

Abstract

The automatic welding equipment is characterized by further comprising a base, an inner longitudinal seam welding mechanism and an outer longitudinal seam welding mechanism, wherein the inner longitudinal seam welding mechanism and the outer longitudinal seam welding mechanism are arranged on the base; the inner longitudinal seam welding mechanism and the outer longitudinal seam welding mechanism comprise a tool for placing a workpiece, an inner longitudinal seam welding special machine for welding an inner longitudinal seam of the workpiece and an outer longitudinal seam welding special machine for welding an outer longitudinal seam of the workpiece. According to the automatic welding machine, detection and alignment of the welding seam position of the workpiece are automatically completed, positioning is conducted after the welding seam position is aligned, the welding seam is automatically welded after positioning is completed, through arrangement of the inner longitudinal seam welding mechanism and the outer longitudinal seam welding mechanism, an outer longitudinal seam and an inner longitudinal seam of the cylindrical workpiece are automatically welded, the automation degree is high, and the machining efficiency is high; the welding position is accurate, and the welding quality is high.

Description

Technical Field

[0001] The present invention relates to internal and external longitudinal seam welding equipment, and specifically refers to an automatic internal and external longitudinal seam welding equipment. Background Art

[0002] In the prior art, cylindrical workpieces such as pipes and tanks are made by welding after being formed by curling metal plates or metal strips. In order to ensure the firmness of welding, it is necessary to weld the external longitudinal seam and the internal longitudinal seam of the cylindrical workpiece. In the prior art, most of the welding is carried out manually, but the welding efficiency is low and the welding quality is uncontrollable by manual welding, which is restricted by the skills of welding workers. For this reason, an automatic internal and external longitudinal seam welding equipment is proposed. Summary of the Invention

[0003] The purpose of the present invention is to propose an automatic internal and external longitudinal seam welding equipment to solve the above problems.

[0004] To achieve the above purpose, the present invention provides the following technical solution: an automatic internal and external longitudinal seam welding equipment, including a control system; it is characterized in that it further 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 the workpiece, an internal longitudinal seam welding special machine for welding the internal longitudinal seam of the workpiece, and an external longitudinal seam welding special machine for welding the external longitudinal seam of the workpiece; the tooling includes a fixed seat, a rotating roller movably installed on the fixed seat, a positioning block one installed on the rotating roller to position the workpiece on the rotating roller, a guiding shaft movably installed on the fixed seat, a moving seat slidably installed on the guiding shaft, a pressing block installed on the moving seat to press the workpiece to position and press the workpiece, and a cylinder installed on the fixed seat and connected to the moving seat to drive the moving seat to move. It also includes a flux backing box arranged below the tooling.

[0005] Further preferably, the external longitudinal seam welding mechanism further includes a lifting tooling arranged on both sides of the tooling 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 two arranged on the lifting claw to limit the position of the workpiece, and a lining device for supporting the workpiece.

[0007] Further preferably, the lining device includes a copper seat for load-bearing and conducting electricity, and a ceramic pad arranged on the copper seat for blocking flux and receiving the molten pool.

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

[0009] Further preferably, the special machine for outer longitudinal seam welding includes a column, a beam slidably mounted on the column, a welding mobile frame slidably mounted on the beam, a welding frame slidably mounted on the welding mobile 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 welding frame, the manual adjustment mechanism includes a transverse adjustment 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, wherein the angle adjustment mechanism includes 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; By detecting the settings of the adjustment mechanism, the workpiece is driven to rotate by the adjustment mechanism to adjust the weld position. At the same time, with 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 at the set weld position, the laser is turned on to emit the set laser line. At this time, the CCD camera is used for shooting again, and the captured image is compared with the set standard image again to determine whether there is any deviation between the weld and the laser line used as the reference. If there is a deviation, the angle adjustment mechanism is controlled according to the deviation direction to finely adjust the angle of the workpiece, so as to ensure the accuracy of the welding position and improve the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a schematic structural diagram of the external longitudinal seam welding mechanism of the present invention; Figure 3 is a schematic structural diagram of the tooling in the present invention; Figure 4 is a schematic structural diagram of the lifting tooling in the present invention; Figure 5 is a schematic structural diagram of the external longitudinal seam welding special machine in the present invention; Figure 6 is in the present invention Figure 5 partial sectional structural diagram; Figure 7 is in the present invention Figure 5 partial structural diagram; Figure 8 is a schematic structural diagram of the internal longitudinal seam welding special machine in the present invention; Figure 9 is a partial structural diagram of the internal longitudinal seam welding special machine in the present invention; Figure 10 is a partial structural diagram of another embodiment of the present invention; Figure 11 is a schematic structural diagram of another embodiment of the present invention; Figure 12 is a schematic structural diagram of the detection mechanism in the present invention; Figure 13 is a schematic structural diagram of the adjustment mechanism and the angle adjustment mechanism in the present invention; Figure 14 is a schematic structural diagram of the angle adjustment mechanism in the present invention.

[0016] Legend: 1. Base; 2. Inner longitudinal seam welding mechanism; 21. Inner longitudinal seam welding special machine; 211. Inner longitudinal seam machine frame; 212. Inner longitudinal seam moving frame; 213. Motor III; 214. Inner longitudinal seam longitudinal moving frame; 215. Inner longitudinal seam transverse moving frame; 3. Outer longitudinal seam welding mechanism; 31. Outer longitudinal seam welding special machine; 311. Column; 312. Cross beam; 313. Welding moving frame; 314. Welding frame; 315. Manual adjustment mechanism; 316. Welding machine; 32. Rack; 33. Motor I; 34. Gear; 35. Motor II; 36. Lead screw; 37. Transverse adjustment frame; 371. Longitudinal adjustment frame; 372. Adjusting lead screw; 373. Adjusting handwheel; 4. Tooling; 41. Fixed seat; 42. Rotating roller; 43. Positioning block I; 44. Guide shaft; 45. Moving seat; 46. Pressing block; 47. Cylinder; 5. Flux backing box; 6. Lifting tooling; 61. Lifting seat; 62. Transverse moving mechanism; 63. Longitudinal moving mechanism; 64. Lifting claw; 65. Positioning block II; 66. Copper seat; 67. Ceramic pad; 7. Detection mechanism; 71. Detection machine frame; 72. Laser emitter; 73. Detection cylinder; 74. CCD camera; 8. Adjustment mechanism; 81. Adjustment machine 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 implementation manners

[0017] Next, we will further explain an automatic welding device for inner and outer longitudinal seams of the present invention in conjunction with the accompanying drawings.

[0018] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indications will also change accordingly.

[0019] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense; for example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] Refer to Figures 1 - 14As shown in the figure, an automatic internal and external longitudinal seam welding device includes a control system; it is characterized by further including a base 1, an internal longitudinal seam welding mechanism 2 placed on the base 1, and an external longitudinal seam welding mechanism 3; the internal longitudinal seam welding mechanism 2 and the external longitudinal seam welding mechanism 3 include a tooling 4 for placing the workpiece, an internal longitudinal seam welding special machine 21 for welding the internal longitudinal seam of the workpiece, and an external longitudinal seam welding special machine 31 for welding the external longitudinal seam of the workpiece; the tooling 4 includes a fixed seat 41, a rotating roller 42 movably installed on the fixed seat 41, a positioning block one 43 installed on the rotating roller 42 to position the workpiece on the rotating roller 42, a guiding shaft 44 movably installed on the fixed seat 41, a moving seat 45 slidably installed on the guiding shaft 44, a pressing block 46 installed on the moving seat 45 to press the workpiece and position and press the workpiece, and a cylinder 47 installed on the fixed seat 41 and connected to the moving seat 45 to drive the moving seat 45 to move. It also includes a flux backing box 5 arranged below the tooling 4; The flux backing box 5 is filled with submerged arc flux, which can be used as a backing protection during welding to prevent burn-through and also help with weld formation; Through the setting of the tooling 4, it is used to support the workpiece and pre-position the workpiece; through the setting of the rotating roller 42, it is convenient for the workpiece on the rotating roller 42 to rotate and reduces the resistance during rotation; Through the setting of the positioning block one 43, one end of the workpiece is positioned. Through the setting of the pressing block 46 and the cylinder 47, the cylinder 47 drives the pressing block 46 to act and cooperate with the positioning block to press the workpiece, thereby limiting the position of the workpiece; Through the setting of this device, the detection and alignment of the weld position of the workpiece are automatically completed. After the weld position is aligned, positioning is performed. After positioning is completed, the weld is automatically welded. Through the setting of the internal longitudinal seam welding mechanism 2 and the external longitudinal seam welding mechanism 3, the external longitudinal seam and the internal longitudinal seam of the cylindrical workpiece are automatically welded, with high automation, high processing efficiency, accurate welding position and high welding quality.

[0021] In one embodiment, the external longitudinal seam welding mechanism 3 further 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 during use, so as to meet workpieces of different diameters.

[0022] In one embodiment, the lifting tooling 6 includes a lifting seat 61, a transverse moving mechanism 62 placed on the lifting seat 61, a longitudinal moving mechanism 63 placed on the transverse moving mechanism 62, a lifting claw 64 placed on the longitudinal moving mechanism 63, a positioning block two 65 arranged on the lifting claw 64 to limit the position of the workpiece, and a cushioning device for supporting the workpiece; Through the setting of the positioning block two 65, it is used for positioning the workpiece when the lifting claw 64 is inserted into the workpiece; The described gasket device includes a copper seat 66 for load-bearing and conduction, and a ceramic pad 67 disposed on the copper seat 66 for blocking the welding flux and connecting to the molten pool. By the setting of the gasket device, and the gasket device is composed of a copper seat 66 and a ceramic pad 67. The copper seat 66 is used for load-bearing and conduction, while the ceramic pad 67 is used for blocking the welding flux and connecting to the molten pool.

[0023] In one embodiment, both the longitudinal movement mechanism 63 and the transverse movement mechanism 62 are servo drive systems composed of a servo motor, a lead screw 36, and a nut seat; using a servo drive system as the driver, the transmission position is accurate and reliable.

[0024] In one embodiment, the special longitudinal seam welding machine 31 includes a column 311, a cross beam 312 slidably mounted on the column 311, a welding moving frame 313 slidably mounted on the cross beam 312, a welding frame 314 slidably mounted on the welding moving 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; A servo drive system for driving the cross beam 312 to move up and down is installed on the column 311; a rack 32 is installed on the cross beam 312, and a first motor 33 is installed on the welding moving frame 313. The first motor 33 is connected to a gear 34 that meshes with the rack 32; a second motor 35 is installed on the welding moving frame 313, and the second motor 35 is drivingly connected to a lead screw 36, and the lead screw 36 is movably connected to the welding frame 314; When the cross beam 312 moves up and down, the servo drive system installed on the column 311 drives the cross beam 312 to move up and down. When moving horizontally, the first motor 33 drives the gear 34 to rotate, and when the gear 34 rotates, it drives the welding moving frame 313 to move on the cross beam 312 through the meshing cooperation with the rack 32; When the welding frame 314 moves up and down, the second motor 35 drives the lead screw 36 to rotate, and when the lead screw 36 rotates, it drives the welding frame 314 to move up and down through the screw-threaded cooperation with the welding frame 314.

[0025] In one embodiment, the manual adjustment mechanism 315 includes a transverse adjustment frame 37 installed on the welding frame 314, a longitudinal adjustment frame 371 slidably mounted on the transverse adjustment frame 37, an adjustment lead screw 372 installed on the transverse adjustment frame 37 and the longitudinal adjustment frame 371, and an adjustment handwheel 373 installed at one end of the adjustment lead screw 372. The longitudinal adjustment frame 371 is movably connected to the adjustment lead screw 372 installed on the transverse adjustment frame 37, and the welding machine 316 is movably connected to the adjustment lead screw 372 installed on the longitudinal adjustment frame 371; By manually adjusting the settings of the manual adjustment mechanism 315, the up, down, left, and right positions of the welding machine 316 can be finely adjusted. When manually adjusting, by rotating the adjustment handwheel 373, the adjustment handwheel 373 drives the adjustment lead screw 372. When the adjustment lead screw 372 rotates, it adjusts the up, down, left, and right positions through the screw fit with the longitudinal moving frame or the welding machine 316.

[0026] In one embodiment, the special machine for inner longitudinal seam welding 21 includes an inner longitudinal seam machine frame 211 installed on the base 1, an inner longitudinal seam moving frame 212 slidably installed on the inner longitudinal seam machine frame 211, a rack 32 installed on the inner longitudinal seam machine frame 211, a motor three 213 installed on the inner longitudinal seam moving frame 212, a gear 34 installed on the motor three 213 and drivingly connected to the rack 32, an inner longitudinal seam longitudinal moving frame 214 slidably installed on the inner longitudinal seam moving frame 212, a servo drive 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 installed on the inner longitudinal seam longitudinal moving frame 214, a servo drive system provided on the inner longitudinal seam longitudinal moving frame 214 for driving the inner longitudinal seam transverse moving frame 215 to move horizontally, and a welding machine 316 installed on the inner longitudinal seam transverse moving frame 215; When the inner longitudinal seam welding machine 316 moves back and forth, by starting the motor three 213, the motor drives the gear 34 to rotate. The gear 34 drives the inner longitudinal seam moving frame 212 to move on the inner longitudinal seam machine frame 211 through the meshing fit with the rack 32. When moving up and down, the servo drive 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 drive 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.

[0027] In one embodiment, it further includes a detection and adjustment mechanism 8 for detecting the position of the workpiece weld seam and automatically adjusting the workpiece position according to the detection result so that the workpiece weld seam is in the 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 machine frame 71, a laser emitter 72 installed on the detection machine frame 71 for emitting a reference line, a detection cylinder 73 installed on the detection machine frame 71, and a CCD camera 74 installed on the detection cylinder 73; the adjustment mechanism 8 further includes an adjustment machine frame 81, an adjustment frame 82 slidably installed on the adjustment machine frame 81, an adjustment roller 83 movably installed on the adjustment frame 82, an adjustment motor 84 installed on the adjustment frame 82 and drivingly connected to the adjustment roller 83, and a servo drive system provided on the adjustment machine frame 81 for driving the adjustment frame 82 to move; a contact sensor 85 is further installed on the adjustment roller 83; By detecting the settings of the adjustment mechanism 8, the workpiece is driven to rotate by the adjustment mechanism 8 to adjust the weld position. At the same time, with the setting of the CCD camera 74, 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 preset in the control system to determine the weld position. When determining the weld position, the standard position image of the weld is preset in the control system in advance. The weld position can also use the laser line emitted by the laser emitter 72 as the reference line of the weld in the standard image. When adjusting the circumferential position of the workpiece, the servo drive system drives the adjustment frame 82 to move forward. When the contact sensor 85 contacts the workpiece during the forward movement of the adjustment frame 82 driving the adjustment roller 83, a signal is sent to the control system. The control system controls the servo drive system to stop operating. At this time, the adjustment roller 83 fits with the workpiece surface. Then, the control adjustment motor 84 is started. The adjustment motor 84 drives the adjustment roller 83 to rotate. The adjustment roller 83 drives the workpiece to rotate through the frictional force between the adjustment roller 83 and the workpiece until the weld moves to the set position and then stops operating. The control system controls the servo system to drive the adjustment roller 83 to reset.

[0028] In one embodiment, it further includes an angle adjustment mechanism 9 for adjusting the angular position of the workpiece. The angle adjustment mechanism 9 includes angle adjustment frames 91 arranged on both sides of the tooling 4, electric hydraulic cylinders 92 installed on the angle adjustment frames 91, and ball heads 93 installed at the ends of the piston rods of the electric hydraulic cylinders 92. With 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, after the weld is in the set weld position, when the set laser line is emitted by the laser, at this time, the CCD camera 74 is used for shooting again. The captured image is compared with the set standard image again to determine whether there is a skew between the weld and the laser line as the reference. If there is a skew, the angle adjustment mechanism 9 is controlled to finely adjust the angle of the workpiece according to the skew direction. During adjustment, the electric hydraulic cylinder 92 on the deviated side is controlled to start. 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. Detection is carried out in real time during the pushing process. When the weld is aligned with the laser line, the pushing stops. At this time, the weld position is accurate, thus ensuring the accurate welding position and improving the welding quality. The setting of the ball head 93 is to enable better contact with the workpiece, and there will be no sharp corners at the contact position. At the same time, after the angle of the workpiece is adjusted, the workpiece can be better clamped. Elastic flexible pads can also be added to the positioning block one 43 and the pressing block 46 to be applicable to both ends of the workpiece with an inclined angle. At the same time, flexible pads can also be added to the positioning block two 65 on the lifting claw 64.

[0029] When the present invention is in use: When automatically welding the outer longitudinal seam of a workpiece: First, the worker moves the workpiece onto the rotating roller 42 of the tooling 4 of the outer longitudinal seam welding mechanism 3 through a hoisting device or other equipment; Then the control system controls the laser to emit a laser line, controls the detection cylinder 73 to start, the detection cylinder 73 drives the video transmitter to move forward to a set position and turns on the CCD camera 74. The CCD camera 74 captures an image and transmits it to the control system, which compares it with the standard image set in the control system. If the weld seam is not in the set position, the control system controls the servo drive system to drive the adjustment frame 82 to move forward. When the contact sensor 85 contacts the workpiece during the forward movement of the adjustment frame 82 driving the adjustment roller 83, a signal is sent to the control system, and the control system controls the servo drive system to stop. At this time, the adjustment roller 83 fits with the workpiece surface, and then the control system controls the adjustment motor 84 to start. The adjustment motor 84 drives the adjustment roller 83 to rotate, and the adjustment roller 83 drives the workpiece to rotate through the friction force between the adjustment roller 83 and the workpiece; During the process of the adjustment roller 83 driving the workpiece to rotate, the CCD camera 74 takes real-time shots. When the weld seam moves to the set position, the control system controls the rotation to stop and controls the adjustment frame 82 to reset; 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 seam and the standard laser line. If there is an angular deviation, the control system controls the angle adjustment mechanism 9 to finely adjust the angle of the workpiece according to the deviation direction. During adjustment, the electric hydraulic cylinder 92 on the side with the deviation is controlled to start, and the electric hydraulic cylinder 92 controls the piston rod and the ball head 93 to extend, and the workpiece is pushed through the ball head 93. Detection is carried out in real time during the pushing process, and when the weld seam is aligned with the laser line, the pushing stops; At this time, if the diameter of the workpiece does not need to be lifted, the control system controls the cylinder 47 to push out the pressing block 46, and the pressing block 46 presses against the workpiece to fix the workpiece. At this time, the positioning of the workpiece is completed; If the workpiece needs to be lifted, the control system controls the lifting tooling 6 on both sides of the workpiece to start, and drives the lifting claws 64 to insert into the workpiece simultaneously through the transverse moving mechanism 62 until the positioning block two 65 abuts against the end of the workpiece, and the inner wall of the workpiece contacts the gasket device to complete the fixation of the workpiece; Then the control system controls the adjustment mechanism 8 to reset; then the control system controls the longitudinal moving mechanism 63 to drive the workpiece to move upward to the set position; Then the control system controls the outer longitudinal seam welding special machine 31 to drive the welding machine 316 to weld the outer longitudinal seam of the workpiece; After welding is completed, the lifting tooling 6 places the workpiece on the rotating roller 42 or the cylinder 47 drives the pressing block 46 to reset. At this time, the worker can move the workpiece to the next process or move it onto the rotating roller 42 of the tooling 4 of the inner longitudinal seam welding mechanism 2; When welding the inner longitudinal seam of the workpiece: Similarly, first detect the weld position through the detection mechanism 7, and control the adjustment mechanism 8 to drive the workpiece to rotate until the weld position is at the set position. Then, adjust the angle of the workpiece according to the laser line. After aligning the weld with the laser line, the control system controls the cylinder 47 to drive the pressing block 46 to press against the workpiece to complete the fixation of the workpiece; After the workpiece is fixed, the control system controls the inner longitudinal seam welding special machine 21 to drive the welding machine 316 to weld the inner longitudinal seam of the workpiece according to the set path. After welding is completed, control the cylinder 47 to drive the pressing block 46 to reset. Then, the worker operates the hoisting equipment to remove the workpiece that has completed the welding of the inner longitudinal seam and the outer longitudinal seam, and thus completes the welding work of the workpiece.

[0030] The protection scope of the present invention is not limited to the above embodiments and their transformations. Routine modifications and replacements made by those skilled in the art based on the content of this embodiment all fall within the protection scope of the present invention.

Claims

1. An automatic welding equipment for internal and external longitudinal seams, including a control system; characterized in that It 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 tooling for placing the workpiece, an inner longitudinal seam welding special machine for welding the inner longitudinal seam of the workpiece, and an outer longitudinal seam welding special machine for welding the outer longitudinal seam of the workpiece; the tooling includes a fixed seat, a rotating roller movably installed on the fixed seat, a first positioning block installed on the rotating roller to position the workpiece on the rotating roller, a guiding shaft movably installed on the fixed seat, a moving seat slidably installed on the guiding shaft, a pressing block installed on the moving seat to press the workpiece and position and press the workpiece, a cylinder installed on the fixed seat and connected to the moving seat to drive the moving seat to move, and a flux backing box provided below the tooling.

2. The automatic internal and external longitudinal seam welding equipment according to claim 1, characterized in that: The outer longitudinal seam welding mechanism further includes a lifting tooling provided on both sides of the tooling for lifting and positioning the workpiece.

3. The automatic internal and external longitudinal seam welding equipment 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 second positioning block provided on the lifting claw to limit the position of the workpiece, and a backing device for supporting the workpiece.

4. The automatic internal and external longitudinal seam welding equipment according to claim 3, characterized in that: The backing device includes a copper seat for load-bearing and conducting electricity and a ceramic pad provided on the copper seat for blocking the flux and receiving the molten pool.

5. An automatic internal and external longitudinal seam welding device according to claim 3, characterized in that: Both the longitudinal moving mechanism and the transverse moving mechanism are servo drive systems composed of a servo motor, a lead screw, and a nut seat.

6. The automatic internal and external longitudinal seam welding equipment according to claim 1, characterized in that: The outer longitudinal seam welding special machine includes a column, a cross beam slidably installed on the column, a welding moving frame slidably installed on the cross beam, a welding frame slidably installed on the welding moving frame, a manual adjustment mechanism installed on the welding frame, and a welding machine installed on the manual adjustment mechanism.

7. An automatic welding device 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 lead screw installed on the transverse adjustment frame and the longitudinal adjustment frame, and an adjustment handwheel installed at one end of the adjustment lead screw. The longitudinal adjustment frame is movably connected to the adjustment lead screw installed on the transverse adjustment frame, and the welding machine is movably connected to the adjustment lead screw installed on the longitudinal adjustment frame.

8. An automatic internal and external longitudinal seam welding device according to claim 1, characterized in that: It also includes a detection and adjustment mechanism for detecting the position of the workpiece weld seam and automatically adjusting the position of the workpiece according to the detection result so that the workpiece weld seam is in a set position; the detection and adjustment mechanism includes a detection mechanism and an adjustment mechanism; the detection mechanism includes a detection frame, a laser emitter 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.

9. The automatic internal and external longitudinal seam welding equipment according to claim 8, characterized in that: The adjustment mechanism further includes an adjustment frame, an adjustment rack slidably installed on the adjustment frame, an adjustment roller movably installed on the adjustment rack, an adjustment motor installed on the adjustment rack and drivingly connected to the adjustment roller, and a servo drive system provided on the adjustment frame for driving the adjustment rack to move; a contact sensor is also installed on the adjustment roller.

10. The automatic internal and external longitudinal seam welding equipment according to claim 1, characterized in that: It further includes an angle adjustment mechanism for adjusting the angular position of the workpiece. The angle adjustment mechanism includes angle adjustment brackets arranged on both sides of the tooling, electric hydraulic cylinders installed on the angle adjustment brackets, and ball heads installed at the ends of the piston rods of the electric hydraulic cylinders.

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