Tube plate welding gun

Abstract

The invention discloses a tube plate welding gun, and relates to the technical field of tube plate welding, the tube plate welding gun comprises a machine body and a machine head, the machine head is rotatably arranged on the machine body, a driving mechanism used for driving the machine head to rotate is arranged in the machine body, an adjusting mechanism is arranged on the machine head, and a welding mechanism and a wire feeding tube are arranged at the adjusting end of the adjusting mechanism; and a wire feeding mechanism is arranged in the machine body and is used for feeding a welding wire into the wire feeding pipe. The wire feeding pipe can be driven by the adjusting mechanism to move, so that the feeding position of the welding wire can be accurately adjusted, the welding mechanism can be driven by the adjusting mechanism to move, the position of the welding mechanism can be accurately adjusted, the welding mechanism can be driven to rotate, and the welding angle can be adjusted; and therefore, the tube plates with different sizes can be conveniently and accurately welded.

Description

Technical Field

[0001] The present application relates to the technical field of tube-sheet welding, and in particular to a tube-sheet welding gun. Background Art

[0002] Tube-to-sheet welding is a common welding process in the industrial field, primarily used to connect pipes to flat plates (with holes in the plates). It is widely used in the manufacturing of boilers, heat exchangers, pressure vessels, chemical equipment, and other applications. The quality of the weld directly affects the equipment's sealing, pressure-bearing capacity, and service life.

[0003] Currently, referring to patent publication number CN102039468A, when welding a pipe to a plate, one end of the pipe is first inserted into a hole in the plate, and then a welding torch is used to perform a circumferential weld at the connection between the pipe and the plate. In actual production, welding of tube sheets of varying sizes is often necessary. When the diameter of the pipe changes, the position and angle of the welding head within the welding torch, as well as the position of the welding wire, need to be adjusted. However, conventional welding torches struggle to achieve multi-directional adjustment of the welding head position, angle, and wire feed position, making it difficult to precisely weld tube sheets of varying sizes. Summary of the Invention

[0004] In order to facilitate precise welding of tube sheets of different sizes, the present application provides a tube sheet welding gun.

[0005] The tube-to-sheet welding gun provided in this application adopts the following technical solution: A tube-to-sheet welding gun, comprising a body and a head, the head being rotatably mounted on the body, a driving mechanism for driving the head to rotate being arranged in the body, an adjusting mechanism being arranged on the head, a welding mechanism and a wire feeding tube being arranged on the adjusting end of the adjusting mechanism, a wire feeding mechanism being arranged in the body, the wire feeding mechanism feeding the welding wire into the wire feeding tube; the adjusting mechanism comprising a baffle, a main slider, a main screw, a first lifting seat, a first lifting screw, a first sliding seat, a first sliding screw, a first auxiliary slider, a second lifting seat, a second lifting screw, a second sliding seat, a second sliding screw, a second auxiliary slider, a rotating seat and a locking member, the baffle being fixedly mounted on the head, the main slider being slidably mounted on the baffle, the main screw being rotatably mounted in the baffle and threadedly passing through the main slider, the first lifting seat and the second lifting seat sliding respectively It is arranged at both ends of the main slider, the first lifting screw is rotatably arranged in the first lifting seat and threaded through the main slider, the second lifting screw is rotatably arranged in the second lifting seat and threaded through the main slider, the first sliding seat is fixedly arranged on the first lifting seat, the first sub-slider is slidably arranged in the first sliding seat, the first sliding screw is rotatably arranged in the first sliding seat and threaded through the first sub-slider, the wire feeding tube is arranged on the first sub-slider, the second sliding seat is fixedly arranged on the second lifting seat, the second sub-slider is slidably arranged in the second sliding seat, the second sliding screw is rotatably arranged in the second sliding seat and threaded through the second sub-slider, the rotating seat is rotatably arranged on the second sub-slider, the locking piece is arranged on the rotating seat and is used to lock the rotating seat, and the welding mechanism is arranged on the rotating seat.

[0006] By adopting the above technical solution, the wire feeding mechanism feeds the welding wire into the wire feeding tube, and the rotating mechanism in the machine body drives the welding mechanism and the wire feeding tube to rotate through the machine head and the adjustment assembly. The adjustment mechanism welds the tube sheet during the rotation process. When welding tube sheets of different sizes, rotating the first lifting screw and the first sliding screw can drive the first sub-slider to move up and down and move parallel, thereby driving the wire feeding tube to move, so that the welding wire feeding position can be precisely adjusted. Rotating the second lifting screw and the second sliding screw can drive the second sub-slider to move up and down and move parallel, thereby driving the welding mechanism to move, so that the position of the welding mechanism can be precisely adjusted. At the same time, rotating the rotating seat can drive the welding mechanism to rotate to adjust the welding angle, thereby facilitating precise welding of tube sheets of different sizes.

[0007] Preferably, the welding mechanism includes a gun body, a gun head, a gun tail, a mounting block, a clamping rod and a tungsten needle, the gun body is fixedly set on a rotating seat, the gun head is set on one side of the gun body, the gun tail thread is set on the other side of the gun body, the mounting block is set in the gun head, the clamping rod is connected to the gun tail, the tungsten needle is inserted in the clamping rod, the end of the tungsten needle slides through the mounting block and out of the gun head, a slide groove is set in the mounting block, the clamping rod is slidably set in the slide groove, the mounting block is located in the slide groove on the side away from the gun body to form a chamfer, when the end of the clamping rod moves to abut the chamfer, the clamping rod clamps and fixes the tungsten needle.

[0008] By adopting the above technical solution, one end of the tungsten needle passes through the gun head and the mounting block and is inserted into the clamping rod. The sliding tungsten needle can adjust the length of the tungsten needle extending out of the gun head. By rotating the gun tail, the gun tail drives the clamping rod to slide in the sliding groove of the mounting block. When the end of the clamping rod abuts the chamfer, the end of the clamping rod tilts under the guiding action of the chamfer, so that the tungsten needle can be clamped and fixed.

[0009] Preferably, the wire feeding mechanism includes a wire reel, a mounting plate, a second driving member, a wire feeding wheel, a wire tensioning wheel and a pressure plate, the wire reel is rotatably arranged in the fuselage, the mounting plate is arranged in the fuselage, the wire feeding wheel is rotatably arranged on the mounting plate, the second driving member is arranged on the mounting plate, the driving end of the second driving member is connected to the wire feeding wheel, the pressure plate is arranged on the mounting plate, the wire tensioning wheel is rotatably arranged on the pressure plate, and the wire tensioning wheel presses the welding wire onto the wire feeding wheel.

[0010] By adopting the above technical solution, the welding wire is wound on the wire reel, the pressure plate drives the wire tensioning wheel to press the welding wire onto the wire feeding wheel, the second driving member on the mounting plate drives the wire feeding wheel to rotate, and the wire feeding wheel drives the welding wire to move, so that the welding wire can be automatically fed out from the wire feeding tube.

[0011] Preferably, a guide rail is provided in the fuselage, a slide seat is slidably provided on the guide rail, and the mounting plate is fixedly provided on the slide seat.

[0012] By adopting the above technical solution, when the welding wire is fed out for a long time, the end of the welding wire will abut the workpiece. When the second driving member continues to drive the wire feeding wheel to rotate, the wire feeding wheel will not continue to drive the welding wire to feed. At this time, the wire feeding wheel rolls on the welding wire. Under the action of the guide rail and the slide seat, the wire feeding wheel can drive the mounting plate to slide on the machine body, thereby buffering the feeding of the welding wire and preventing the welding wire from being stuck on the workpiece.

[0013] Preferably, a rotating rod is rotatably provided on the mounting plate, a pressure plate is threadedly mounted on the rotating rod, an accommodating groove is provided at one end of the pressure plate, the rotating rod is located in the accommodating groove, and the pressure plate moves to abut against the pressure plate.

[0014] By adopting the above technical solution, first rotate the rotating rod into the accommodating groove of the pressure plate, and then rotate the pressure plate so that the bottom wall of the pressure plate is pressed against the top wall of the pressure plate, and the wire tensioning wheel can be quickly pressed down, so that the wire tensioning wheel can press the welding wire tightly onto the wire feeding wheel.

[0015] Preferably, a locking mechanism for locking the pipeline is provided on the machine head, and the locking mechanism includes a third driving member, a pull rod, a stop rod, a front cone sleeve, a rear cone sleeve and a locking sleeve. The stop rod is fixedly arranged at the end of the machine head away from the fuselage, and the third driving member is arranged in the fuselage. The pull rod is slidably arranged in the stop rod, the machine head and the fuselage. One end of the pull rod is connected to the driving end of the third driving member, and the other end extends out of the stop rod. The front cone sleeve is fixedly arranged at the end of the pull rod extending out of the stop rod, and the rear cone sleeve is fixedly arranged at the end of the pull rod. The locking sleeve is sleeved on the pull rod and is located between the front cone sleeve and the rear cone sleeve. A plurality of deformation grooves are provided on the locking sleeve, and the pipeline is sleeved on the deformation sleeve.

[0016] By adopting the above technical solution, before welding the pipeline, the locking sleeve is first extended into the pipeline, and the third driving member then pulls the pull rod to move, and the pull rod drives the front cone sleeve to move toward the rear cone sleeve, and the ends of the front cone sleeve and the rear cone sleeve that are close to each other are inserted into the locking sleeve. Under the action of the deformation groove, the locking sleeve expands and deforms, and after expansion, the locking sleeve presses against the inner wall of the pipeline, thereby locking the pipeline and making it difficult for the pipeline to move during welding.

[0017] Preferably, both ends of the locking sleeve in the length direction are protruded to form locking rings, and the deformation groove is provided in the locking ring and the locking sleeve.

[0018] By adopting the above technical solution, when the locking sleeve expands outward, it drives the locking ring to move outward, and the locking ring moves to press against the inner wall of the pipe, thereby further improving the locking effect of the locking mechanism on the pipe.

[0019] Preferably, the driving mechanism includes a first driving member, a driving gear and a driven ring gear, the first driving member is arranged in the fuselage, the driving gear is rotatably arranged in the fuselage and connected to the driving end of the first driving member, the driven ring gear is rotatably arranged in the fuselage, the driven ring gear is engaged with the driving gear, and the driven ring gear is fixedly connected to the machine head.

[0020] By adopting the above technical solution, the first driving member drives the driving gear to rotate, the driving gear drives the driven ring gear to rotate, and the driven ring gear drives the machine head to rotate, so that the welding mechanism can perform circumferential welding around the pipe.

[0021] Preferably, a rack is fixedly installed in the fuselage, a first gear is rotatably provided on the mounting plate, the first gear is transmission-connected to the driving end of the second driving member, a second gear is rotatably provided on the mounting plate, the second gear is meshed with the first gear, a turntable is coaxially fixed on the second gear, a reset tooth is provided on the turntable, and each time the turntable rotates one circle, the reset tooth contacts the rack once and drives the mounting plate to move and reset.

[0022] By adopting the above technical solution, after the mounting plate moves and buffers on the guide rail through the slide, the second driving member drives the wire feeding wheel to rotate to feed the welding wire, and the second driving member simultaneously drives the first gear to rotate, and the first gear drives the turntable to rotate through the second gear, and the turntable drives the reset tooth to rotate. Whenever the turntable drives the reset tooth to move to the rack, the reset tooth contacts the rack and drives the mounting plate to move and reset. After the reset tooth has moved the mounting plate multiple times, it can drive the mounting plate to slowly move and reset.

[0023] Preferably, the reset tooth is rotatably arranged on the turntable, a reset torsion spring is provided at the rotation connection between the reset tooth and the turntable, an empty slot is opened in the middle of the rack, and when the mounting plate moves and resets, the turntable drives the rack to rotate into the empty slot.

[0024] By adopting the above technical solution, after the mounting plate moves and resets, when the turntable drives the reset tooth to rotate to the rack, the reset tooth rotates into the empty slot of the rack, so that the reset tooth will not continue to move the mounting plate. When the mounting plate moves again for buffering and the reset tooth just rotates to the rack, the reset tooth can rotate away from the rack, so that the movement of the mounting plate will not be hindered, and then the reset torsion spring drives the reset tooth to rotate and reset.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. The adjustment mechanism drives the wire feeding tube to move, so that the wire feeding position can be accurately adjusted. The adjustment mechanism drives the welding mechanism to move, so that the welding mechanism position can be accurately adjusted. The adjustment mechanism drives the welding mechanism to rotate, so as to adjust the welding angle, thereby facilitating accurate welding of tube sheets of different sizes. 2. With the help of the guide rail and the slide, when the welding wire is fed out for a long time, the end of the welding wire will abut the workpiece. When the second driving member continues to drive the wire feeding wheel to rotate, the wire feeding wheel will not continue to drive the welding wire to feed the wire. At this time, the wire feeding wheel rolls on the welding wire. Under the action of the guide rail and the slide, the wire feeding wheel can drive the mounting plate to slide on the machine body, thereby buffering the feeding of the welding wire and preventing the welding wire from being stuck on the workpiece. 3. Through the locking mechanism, before welding the pipeline, the locking sleeve is first extended into the pipeline, and the third driving member pulls the pull rod to move, and the pull rod drives the front cone sleeve to move toward the rear cone sleeve. The ends of the front cone sleeve and the rear cone sleeve that are close to each other are inserted into the locking sleeve. Under the action of the deformation groove, the locking sleeve expands and deforms. After expansion, the locking sleeve presses against the inner wall of the pipeline, thereby locking the pipeline and preventing the pipeline from moving easily during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of the tube-to-sheet welding gun in Example 1 of the present application; Figure 2 This is a partial structural diagram of the tube-to-sheet welding gun in Example 1 of the present application; Figure 3 This is an exploded view of part of the structure of the tube-to-sheet welding gun in Example 1 of the present application, highlighting the adjustment mechanism; Figure 4 This is a partial structural diagram of the tube-to-sheet welding gun in Example 1 of the present application, highlighting the first auxiliary slider; Figure 5 This is a partial structural diagram of the tube-to-sheet welding gun in Example 1 of the present application, highlighting the second auxiliary slider; Figure 6 This is a partial structural cross-sectional view of the tube-to-sheet welding gun in Example 1 of the present application, highlighting the welding mechanism; Figure 7 This is a partial structural diagram of the tube-to-sheet welding gun in Example 1 of the present application, highlighting the wire feeding mechanism; Figure 8 This is an exploded view of part of the structure of the tube-to-sheet welding gun in Example 1 of the present application, highlighting the wire feeding mechanism; Figure 9 This is a partial structural diagram of the tube-to-sheet welding gun in Example 1 of the present application, highlighting the wire feeding gear; Figure 10 This is a partial structural cross-sectional view of the tube-to-sheet welding gun in Example 1 of the present application, highlighting the locking mechanism; Figure 11 This is a partial structural diagram of the tube-to-sheet welding gun in Example 2 of the present application; Figure 12 This is an exploded cross-sectional view of part of the structure of the tube-to-sheet welding gun in Example 2 of the present application.

[0027] 1. Body; 2. Head; 3. Wire feeding tube; 4. Driving mechanism; 41. First driving member; 42. Driving gear; 43. Driven gear ring; 5. Adjusting mechanism; 501. Baffle; 502. Main slider; 503. Main screw rod; 504. First lifting seat; 505. First lifting screw rod; 506. First sliding seat; 507. First sliding screw rod; 508. First auxiliary slider; 509. Second lifting seat; 510. Second lifting screw rod; 511. Second sliding seat; 512. Second sliding screw rod; 513. Second auxiliary slider; 514. Rotating seat; 515. Locking member; 6. Welding mechanism; 61. Gun body; 62. Gun head; 63. Gun tail; 64. Mounting block; 65. Clamping rod; 66. Tungsten needle; 7. Wire feeding mechanism; 71. Wire reel; 72. Mounting plate; 73 , second driving member; 74, wire feeding wheel; 75, wire tightening wheel; 76, pressure plate; 8, slide groove; 9, chamfer; 10, guide rail; 11, slide seat; 12, rotating rod; 13, pressure plate; 14, receiving groove; 15, locking mechanism; 151, third driving member; 152, pull rod; 1521, first rod body; 1522, second rod body; 153, stop rod; 154, front cone sleeve; 155, rear cone Sleeve; 156, locking sleeve; 16, deformation groove; 17, wire feed cover; 18, handle; 19, end cover; 20, arc groove; 21, mounting seat; 22, mounting bracket; 23, cover plate; 24, wire feed gear; 25, C-shaped frame; 26, locking ring; 27, rack; 28, first gear; 29, second gear; 30, turntable; 31, reset tooth; 32, reset torsion spring; 33, empty slot. DETAILED DESCRIPTION

[0028] The following is combined with Figures 1-12 This application is described in further detail.

[0029] The embodiment of the present application discloses a tube-to-sheet welding gun.

[0030] Example 1: Reference Figure 1 A tube-to-sheet welding gun includes a body 1 and a head 2, the head 2 is rotatably mounted at one end of the body 1, a wire feeding cover 17 is threadedly mounted on the end of the body 1 away from the head 2, an end cover 19 is threadedly mounted on the end of the wire feeding cover 17 away from the body 1, and a handle 18 is fixedly mounted on the bottom of the body 1.

[0031] Reference Figure 1 and Figure 2A driving mechanism 4 is installed in the body 1. The driving mechanism 4 includes a first driving member 41, a driving gear 42, and a driven ring gear 43. The first driving member 41 is fixedly installed in the body 1, and the driving gear 42 is rotatably installed in the body 1. The driving gear 42 is fixedly installed at the driving end of the first driving member 41. The driven ring gear 43 is rotatably installed in the body 1, and the driven ring gear 43 is meshed with the driving gear 42. The driven ring gear 43 is fixedly connected to the head 2. In the present application, the first driving member 41 can be optionally used as a servo motor. The first driving member 41 can drive the head 2 to rotate through the driving gear 42 and the driven ring gear 43.

[0032] The machine head 2 is mounted with an adjustment mechanism 5, on which a welding mechanism 6 and a wire feed tube 3 are mounted. A wire feed mechanism 7 is mounted within the machine body 1. This mechanism feeds the welding wire into the wire feed tube 3, which then moves the welding wire through the wire feed tube 3 to the workpiece where it will be welded. The machine head 2, through the adjustment mechanism 5, drives the wire feed tube 3 and the welding mechanism 6 to rotate around the pipe. The welding mechanism 6 then automatically performs circumferential welding on the joint between the pipe and the plate.

[0033] Reference Figure 3 、 Figure 4 and Figure 5 Specifically, the adjustment mechanism 5 includes a baffle 501, a main slider 502, a main screw 503, a first lifting seat 504, a first lifting screw 505, a first sliding seat 506, a first sliding screw 507, a first auxiliary slider 508, a second lifting seat 509, a second lifting screw 510, a second sliding seat 511, a second sliding screw 512, a second auxiliary slider 513, a rotating seat 514, and a locking member 515. Two baffles 501 are installed, and the two baffles 501 are fixedly installed on the machine head 2 at intervals. The main screw 503 is rotatably mounted on the two baffles 501. The main slider 502 is slidably installed between the two baffles 501 along the length of the machine head 2 via two slide rods, and the main screw 503 is threaded through the main slider 502.

[0034] The first lifting seat 504 is slidably installed on one side of the main slider 502 along the thickness direction of the machine head 2 through two sliding rods. The first lifting screw rod 505 is rotatably installed in the first lifting seat 504, and the first lifting screw rod 505 is threaded through the main slider 502. Rotating the first lifting screw rod 505 can drive the first lifting seat 504 to move up and down.

[0035] The first sliding seat 506 is fixedly installed on the outer wall of the first lifting seat 504, and the first sub-slider 508 is slidably installed in the first sliding seat 506 along the length direction of the machine head 2 through two sliding rods. The first sliding screw 507 is rotatably installed in the first sliding seat 506, and the first sliding screw 507 is threaded through the first sub-slider 508. Rotating the first sliding screw 507 can drive the first sub-slider 508 to move horizontally.

[0036] The wire feeding tube 3 is fixedly mounted at the bottom of the first auxiliary slider 508. By rotating the first lifting screw 505 and the first sliding screw 507, the wire feeding tube 3 can be driven to move up and down and move parallel to each other, thereby facilitating precise adjustment of the wire feeding position of the welding wire.

[0037] The second lifting seat 509 is installed on the other side of the main slider 502 by sliding along the thickness direction of the machine head 2 through two sliding rods. The second lifting screw rod 510 is rotatably installed in the second lifting seat 509, and the second lifting screw rod 510 is threaded through the main slider 502. Rotating the second lifting screw rod 510 can drive the second lifting seat 509 to move up and down.

[0038] The second sliding seat 511 is fixedly installed on the outer wall of the second lifting seat 509, and the second sub-slider 513 is slidably installed in the second sliding seat 511 along the length direction of the machine head 2 through two sliding rods. The second sliding screw 512 is rotatably installed in the second sliding seat 511, and the second sliding screw 512 is threaded through the second sub-slider 513. Rotating the second sliding screw 512 can drive the second sub-slider 513 to move horizontally.

[0039] The rotating seat 514 is rotatably installed at the bottom of the second sub-slider 513 through a rotating shaft, and the locking piece 515 is threadedly installed on the rotating seat 514. An arc groove 20 is opened in the second sub-slider 513, and the locking piece 515 slides in the arc groove 20. In this application, the locking piece 515 can be selected as a bolt.

[0040] The welding mechanism 6 is mounted on a rotating base 514. Rotating the second lifting screw 510 and the second sliding screw 512 enables the welding mechanism 6 to move vertically and horizontally, thereby facilitating precise adjustment of the welding position of the welding mechanism 6. Rotating the rotating base 514 drives the welding mechanism 6 to rotate, and rotating the locking member 515 to lock the rotating base 514 allows the welding angle of the welding mechanism 6 to be adjusted, facilitating precise welding of tube sheets of different sizes.

[0041] Reference Figure 3 and Figure 6 Specifically, the welding mechanism 6 includes a gun body 61, a gun head 62, a gun butt 63, a mounting block 64, a clamping rod 65, and a tungsten needle 66. The gun body 61 is fixedly mounted on the rotating base 514, the gun head 62 is fixedly mounted on one side of the gun body 61, and the gun butt 63 is threadedly mounted on the other side of the gun body 61. The mounting block 64 is threadedly mounted within the gun head 62, and the end of the mounting block 64 is inserted into the gun body 61. The clamping rod 65 is mounted at the end of the gun butt 63. A slide groove 8 is defined in the end of the mounting block 64 near the clamping rod 65, and the end of the clamping rod 65 away from the gun butt 63 is slidably mounted in the slide groove 8.

[0042] The mounting block 64 has a chamfer 9 formed on the end of the chute 8 away from the clamping rod 65. The inner diameter of the chute 8 gradually decreases at this chamfer 9. The end of the clamping rod 65 near the chamfer 9 is beveled. A tungsten needle 66 is slidably mounted within the mounting block 64, with one end of the needle inserted into the clamping rod 65 and the other end extending out of the machine head 2.

[0043] The sliding tungsten needle 66 can adjust the length of the tungsten needle 66 extending out of the gun head 62. After the tungsten needle 66 is adjusted, the gun tail 63 is rotated, and the gun tail 63 drives the clamping rod 65 to slide in the slide groove 8 of the mounting block 64. When the end of the clamping rod 65 abuts the chamfer 9 of the slide groove 8, the end of the clamping rod 65 is tilted under the guidance of the chamfer 9, so that the tungsten needle 66 can be clamped and fixed.

[0044] Reference Figure 7 、 Figure 8 and Figure 9 Specifically, the wire feeding mechanism 7 includes a wire reel 71, a mounting plate 72, a second driving member 73, a wire feeding roll 74, a wire tightening roll 75, and a pressure plate 76. A mounting seat 21 is fixedly mounted within the body 1, and a mounting frame 22 is fixedly mounted on the mounting seat 21. The wire reel 71 is rotatably mounted on the mounting frame 22, and the welding wire is wound on the wire reel 71. A guide rail 10 is fixedly mounted on the mounting seat 21, and a slide 11 is slidably mounted on the guide rail 10. The mounting plate 72 is fixedly mounted on the slide 11.

[0045] A second drive member 73 is fixedly mounted on the side wall of the mounting plate 72. A wire feed roller 74 is rotatably mounted within the mounting plate 72. A wire feed gear 24 is mounted within the wire feed roller 74. The wire feed gear 24 increases the friction between the wire feed roller 74 and the welding wire, facilitating wire feeding by the wire feed roller 74. The driving end of the second drive member 73 is connected to the wire feed roller 74. In the present application, the second drive member 73 can optionally be a servo motor. One end of the pressure plate 76 is rotatably mounted on the mounting plate 72 via a rotating shaft. A wire tensioning roller 75 is rotatably mounted at the bottom center of the pressure plate 76. The welding wire passes between the wire tensioning roller 75 and the wire feed roller 74. The other end of the pressure plate 76 is provided with a receiving slot 14. A rotating rod 12 is rotatably mounted on the mounting plate 72. A pressure plate 13 is threadedly mounted on the rotating rod 12. A cover plate 23 is removably fixed to the outer wall of the mounting plate 72 via bolts. The cover plate 23 covers the outer sides of the wire feed roller 74 and the pressure plate 76 to ensure the stability of the wire feed roller 74 during rotation.

[0046] When the rotating rod 12 rotates to a vertical position, the rotating rod 12 moves into the receiving groove 14, and the pressure plate 13 is rotated. The pressure plate 13 moves downward and presses the pressure plate 76 against the mounting plate 72. The pressure plate 76 drives the wire tensioning roller 75 to press the welding wire against the wire feeding roller 74. The second driving member 73 on the mounting plate 72 drives the wire feeding roller 74 to rotate, and the wire feeding roller 74 drives the welding wire to move. The welding wire passes through the fuselage 1 and enters the wire feeding tube 3, so that the welding wire can be automatically fed out of the wire feeding tube 3.

[0047] Reference Figure 3 and Figure 10 The machine head 2 is equipped with a locking mechanism 15, which is inserted into the pipe and locks the pipe. Specifically, the locking mechanism 15 includes a third driving member 151, a pull rod 152, a blocking rod 153, a front cone sleeve 154, a rear cone sleeve 155, and a locking sleeve 156. The third driving member 151 is fixedly installed in the machine body 1, and the pull rod 152 is composed of a first rod body 1521 and a second rod body 1522. The first rod body 1521 is slidably installed in the machine body 1 and the machine head 2. The end of the first rod body 1521 is fixedly connected to the driving end of the third driving member 151. In this application, the third driving member 151 can be optionally used as a cylinder.

[0048] The blocking rod 153 is fixedly installed at the end of the machine head 2 away from the fuselage 1, and the second rod body 1522 is slidably installed in the blocking rod 153 and the machine head 2. One end of the second rod body 1522 is threadedly installed on the end of the first rod body 1521 away from the third driving member 151, and the other end of the second rod body 1522 extends to the outside of the blocking rod 153.

[0049] The front cone sleeve 154 is threadedly fixedly mounted on the end of the second rod 1522 away from the first rod 1521, and the rear cone sleeve 155 is fixedly mounted on the end of the blocking rod 153 away from the fuselage 1, and the second rod 1522 slides through the rear cone sleeve 155. The diameters of the ends of the front cone sleeve 154 and the rear cone sleeve 155 that are close to each other gradually decrease and form a tapered shape.

[0050] Locking sleeve 156 is mounted between front and rear cone sleeves 154 and 155. It fits over second rod 1522. The inner sidewalls of locking sleeve 156 are flared at both ends to engage the tapered ends of front and rear cone sleeves 154 and 155. Locking rings 26 are integrally formed on both ends of the outer sidewalls of locking sleeve 156. Multiple deformation grooves 16 are spaced apart within locking sleeve 156 and locking ring 26.

[0051] Before welding the pipe, the locking sleeve 156 is first inserted into the pipe. The third driving member 151 drives the second rod 1522 to move via the first rod 1521. The second rod 1522 drives the front cone sleeve 154 to move toward the rear cone sleeve 155. The tapered ends of the front cone sleeve 154 and the rear cone sleeve 155, which are close to each other, are inserted into the locking sleeve 156. Under the action of the multiple deformation grooves 16, the locking sleeve 156 expands and deforms. After the expansion, the locking sleeve 156 drives the locking ring 26 to press against the inner wall of the pipe, thereby locking the pipe and preventing it from moving during welding.

[0052] The tube-to-sheet welding gun of the present embodiment is implemented as follows: before welding a pipe, the locking sleeve 156 is first inserted into the pipe. The third driving member 151 drives the second rod 1522 to move via the first rod 1521. The second rod 1522 drives the front cone sleeve 154 toward the rear cone sleeve 155. The tapered ends of the front cone sleeve 154 and the rear cone sleeve 155, which are close to each other, are inserted into the locking sleeve 156. Under the action of the multiple deformation grooves 16, the locking sleeve 156 expands and deforms. After the locking sleeve 156 expands, it drives the locking ring 26 to press against the inner wall of the pipe, thereby locking the pipe and preventing it from moving during welding. The pipe is then inserted into the hole in the plate. The first lifting screw 505 and the first sliding screw 507 are rotated to adjust the position of the wire feed tube 3. The second lifting screw 510 and the second sliding screw 512 are rotated to adjust the position of the tungsten needle 66. The rotating seat 514 is rotated to adjust the welding angle of the tungsten needle 66. The second driving member 73 drives the wire feed roller 74 to rotate, and the wire feed roller 74 drives the welding wire to move. After passing through the machine body 1, the welding wire enters the wire feed tube 3, so that the welding wire can be automatically fed out of the wire feed tube 3. The first driving member 41 can drive the head 2 to rotate through the driving gear 42 and the driven ring gear 43. The head 2 drives the wire feed tube 3 and the welding mechanism 6 to rotate around the pipe through the adjustment mechanism 5. The welding mechanism 6 then automatically performs circumferential welding on the connection between the pipe and the plate.

[0053] Example 2: Reference Figure 11 and Figure 12 This embodiment differs from Example 1 in that a first gear 28 and a second gear 29 are rotatably mounted on the outer wall of the cover plate 23, meshing with each other. The second gear 29 is located above the first gear 28, and the rotating shaft of the first gear 28 is inserted into the driving end of the second driving member 73. A turntable 30 is coaxially fixedly mounted on the second gear 29. A reset tooth 31 is rotatably mounted on the outer wall of the turntable 30, and a reset torsion spring 32 is installed at the rotational connection between the reset tooth 31 and the turntable 30. C-shaped frames 25 are fixedly mounted at both ends of the guide rail 10 via bolts. A rack 27 is formed at the bottom of the C-shaped frame 25, and a slot 33 is defined in the middle of the rack 27.

[0054] The implementation principle of Example 2 of the present application is as follows: After the mounting plate 72 moves and buffers on the guide rail 10 through the slide 11, the second drive member 73 drives the wire feed wheel 74 to rotate to feed the welding wire. The second drive member 73 simultaneously drives the first gear 28 to rotate. The first gear 28 drives the turntable 30 to rotate through the second gear 29. The turntable 30 drives the reset tooth 31 to rotate. Whenever the turntable 30 drives the reset tooth 31 to move to the rack 27, the reset tooth 31 contacts the rack 27 and moves the mounting plate 72 to reset. After the reset tooth 31 has moved the mounting plate 72 multiple times, it can drive the mounting plate 72 to slowly move and reset. After the mounting plate 72 moves and resets, when the turntable 30 drives the reset tooth 31 to rotate to the rack 27, the reset tooth 31 rotates into the empty slot 33 of the rack 27, so that the reset tooth 31 will not continue to move the mounting plate 72. When the mounting plate 72 moves again for buffering and the reset tooth 31 just rotates to the rack 27, the reset tooth 31 can rotate away from the rack 27 so that the movement of the mounting plate 72 is not blocked, and then the reset torsion spring 32 drives the reset tooth 31 to rotate and reset.

[0055] The above are merely optional embodiments of the present disclosure and are not intended to limit the present disclosure. Those skilled in the art will readily appreciate that the present disclosure may be modified and varied in various ways. Any modifications, equivalent substitutions, improvements, and the like made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure.

Claims

1. A tube-to-sheet welding gun, characterized by: The invention comprises a machine body (1) and a machine head (2), wherein the machine head (2) is rotatably arranged on the machine body (1), a driving mechanism (4) for driving the machine head (2) to rotate is arranged in the machine body (1), an adjusting mechanism (5) is arranged on the machine head (2), a welding mechanism (6) and a wire feeding tube (3) are arranged on the adjusting end of the adjusting mechanism (5), a wire feeding mechanism (7) is arranged in the machine body (1), and the wire feeding mechanism (7) feeds the welding wire into the wire feeding tube (3); the adjusting mechanism (5) comprises a baffle (501), a main slider (502), a main screw rod (503), a first lifting seat (504), a first lifting screw rod (505), a first lifting screw rod (506), a first lifting screw rod (507), a first lifting screw rod (508), a first lifting screw rod (509), a first lifting screw rod (501), a first lifting screw rod (501), a first lifting screw rod (501), a first lifting screw rod (502), a first lifting screw rod (503), a first lifting screw rod (504), a first lifting screw rod (505), a first lifting screw rod (506), a first lifting screw rod (507), a first lifting screw rod (508), a first lifting screw rod (509), a first lifting screw rod (509), a first lifting screw rod (501 ... 5), a first sliding seat (506), a first sliding screw (507), a first auxiliary slider (508), a second lifting seat (509), a second lifting screw (510), a second sliding seat (511), a second sliding screw (512), a second auxiliary slider (513), a rotating seat (514) and a locking member (515), the baffle (501) is fixedly arranged on the machine head (2), the main slider (502) is slidably arranged on the baffle (501), the main screw (503) is rotatably arranged in the baffle (501) and is threaded through the main slider (502), the first lifting seat (504) and the second lifting seat ( 509) are respectively slidably arranged at both ends of the main slider (502), the first lifting screw rod (505) is rotatably arranged in the first lifting seat (504) and is threaded through the main slider (502), the second lifting screw rod (510) is rotatably arranged in the second lifting seat (509) and is threaded through the main slider (502), the first sliding seat (506) is fixedly arranged on the first lifting seat (504), the first auxiliary slider (508) is slidably arranged in the first sliding seat (506), the first sliding screw rod (507) is rotatably arranged in the first sliding seat (506) and is threaded through the first auxiliary slider (508), The wire feeding tube (3) is arranged on the first auxiliary slider (508), the second sliding seat (511) is fixedly arranged on the second lifting seat (509), the second auxiliary slider (513) is slidably arranged in the second sliding seat (511), the second sliding screw (512) is rotatably arranged in the second sliding seat (511) and threaded through the second auxiliary slider (513), the rotating seat (514) is rotatably arranged on the second auxiliary slider (513), the locking member (515) is arranged on the rotating seat (514) and is used to lock the rotating seat (514), and the welding mechanism (6) is arranged on the rotating seat (514).

2. A tube-to-sheet welding gun according to claim 1, characterized in that: The welding mechanism (6) comprises a gun body (61), a gun head (62), a gun tail (63), a mounting block (64), a clamping rod (65) and a tungsten needle (66), wherein the gun body (61) is fixedly arranged on a rotating seat (514), the gun head (62) is arranged on one side of the gun body (61), the gun tail (63) is threadedly arranged on the other side of the gun body (61), the mounting block (64) is arranged in the gun head (62), the clamping rod (65) is connected to the gun tail (63), and the tungsten needle (66) is fixedly arranged on the rotating seat (514). The needle (66) is inserted into the clamping rod (65), and the end of the tungsten needle (66) slides through the mounting block (64) and passes through the gun head (62). A slide groove (8) is provided in the mounting block (64), and the clamping rod (65) is slidably set in the slide groove (8). The mounting block (64) is located in the slide groove (8) and has a chamfer (9) formed on the side away from the gun body (61). When the end of the clamping rod (65) moves to abut the chamfer (9), the clamping rod (65) clamps and fixes the tungsten needle (66).

3. The tube-to-sheet welding gun according to claim 1, characterized in that: The wire feeding mechanism (7) comprises a wire reel (71), a mounting plate (72), a second driving member (73), a wire feeding wheel (74), a wire tightening wheel (75) and a pressure plate (76); the wire reel (71) is rotatably arranged in the machine body (1); the mounting plate (72) is arranged in the machine body (1); the wire feeding wheel (74) is rotatably arranged on the mounting plate (72); the second driving member (73) is arranged on the mounting plate (72); the driving end of the second driving member (73) is connected to the wire feeding wheel (74); the pressure plate (76) is arranged on the mounting plate (72); the wire tightening wheel (75) is rotatably arranged on the pressure plate (76); and the wire tightening wheel (75) presses the welding wire onto the wire feeding wheel (74).

4. A tube-to-sheet welding gun according to claim 3, characterized in that: A guide rail (10) is provided in the body (1), a slide seat (11) is slidably provided on the guide rail (10), and the mounting plate (72) is fixedly provided on the slide seat (11).

5. The tube-to-sheet welding gun according to claim 3, characterized in that: A rotating rod (12) is rotatably provided on the mounting plate (72), a pressure plate (13) is threadedly installed on the rotating rod (12), an accommodating groove (14) is provided at one end of the pressure plate (76), the rotating rod (12) is located in the accommodating groove (14), and the pressure plate (13) moves to abut against the pressure plate (76).

6. The tube-to-sheet welding gun according to claim 1, characterized in that: The machine head (2) is provided with a locking mechanism (15) for locking the pipeline. The locking mechanism (15) comprises a third driving member (151), a pull rod (152), a blocking rod (153), a front cone sleeve (154), a rear cone sleeve (155) and a locking sleeve (156). The blocking rod (153) is fixedly arranged at the end of the machine head (2) away from the machine body (1). The third driving member (151) is arranged in the machine body (1). The pulling rod (152) is slidably arranged in the blocking rod (153), the machine head (2) and the machine body (1). One end of the pull rod (152) is connected to the driving end of the third driving member (151), and the other end extends out of the blocking rod (153). The front cone sleeve (154) is fixedly set on the end of the pull rod (152) extending out of the blocking rod (153). The rear cone sleeve (155) is fixedly set on the end of the pull rod (152). The locking sleeve (156) is sleeved on the pull rod (152) and is located between the front cone sleeve (154) and the rear cone sleeve (155). A plurality of deformation grooves (16) are provided on the locking sleeve (156), and the pipeline is sleeved on the deformation sleeve.

7. The tube-to-sheet welding gun according to claim 6, characterized in that: Both ends of the locking sleeve (156) in the length direction are protruded outwardly to form locking rings (26), and the deformation groove (16) is opened in the locking ring (26) and the locking sleeve (156).

8. The tube-to-sheet welding gun according to claim 1, characterized in that: The driving mechanism (4) comprises a first driving member (41), a driving gear (42) and a driven ring gear (43); the first driving member (41) is arranged in the machine body (1); the driving gear (42) is rotatably arranged in the machine body (1) and connected to the driving end of the first driving member (41); the driven ring gear (43) is rotatably arranged in the machine body (1); the driven ring gear (43) is meshed with the driving gear (42), and the driven ring gear (43) is fixedly connected to the machine head (2).

9. The tube-to-sheet welding gun according to claim 3, characterized in that: A rack (27) is fixedly installed in the body (1), a first gear (28) is rotatably provided on the mounting plate (72), the first gear (28) is transmission-connected to the driving end of the second driving member (73), a second gear (29) is rotatably provided on the mounting plate (72), the second gear (29) is meshed with the first gear (28), a turntable (30) is coaxially fixed on the second gear (29), a reset tooth (31) is provided on the turntable (30), and each time the turntable (30) rotates one circle, the reset tooth (31) contacts the rack (27) once and moves the mounting plate (72) to reset.

10. The tube-to-sheet welding gun according to claim 9, characterized in that: The reset tooth (31) is rotatably arranged on the turntable (30), and a reset torsion spring (32) is provided at the rotation connection between the reset tooth (31) and the turntable (30). An empty slot (33) is provided in the middle of the rack (27). When the mounting plate (72) moves and resets, the turntable (30) drives the rack (27) to rotate into the empty slot (33).

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