A small-diameter pipe welding torch swing mechanism

Abstract

The present invention provides a small-diameter pipe welding welding gun swinging mechanism, which relates to the technical field of welding gun swinging. The small-diameter pipe welding welding gun swinging mechanism comprises an inner furnace body and a base, and is characterized in that a slide is slidably connected to the base via a sliding part, a welding arm is provided on the slide, and the welding arm is movably connected to the welding gun via an adjusting part, a first driving part for driving the slide to complete an axial gun swinging action is provided on the base, a second driving part for driving the welding arm to complete a radial gun swinging action is provided on the slide, and a third driving part for adjusting the extension length of the welding arm is also provided on the slide.

Description

Technical Field

[0001] The invention relates to the technical field of welding gun swinging, in particular to a small-diameter pipe welding welding gun swinging mechanism. Background Art

[0002] When welding the inner wall girth of a small-diameter pipe, the swinging motion of a conventional welding torch is limited due to the limited inner wall space of the small-space pipe, and it is difficult to swing the welding torch to a large extent. For example, the patent number CN201721273574.1 and the authorized utility model patent discloses an automatic welding torch swinger for annular welds. At the same time, a similar welding torch swinging mechanism is also difficult to be applied to the girth welding of small-diameter pipes.

[0003] Especially when facing welding work with long length and deep welding depth, even the welding gun is difficult to reach the welding position, and it is even more difficult to achieve regular swing of the welding gun and continuous welding of the circumferential seam, which increases the difficulty of circumferential seam welding of pipe fittings with lower apertures. Summary of the invention

[0004] The invention aims to provide a small-diameter pipe welding torch swing mechanism, aiming to solve the problem that the welding torch is difficult to swing during the circumferential seam welding of small-diameter pipes.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: it includes a base, characterized in that a slide is slidably connected to the base via a sliding part, a welding arm is provided on the slide, and the welding arm is movably connected to a welding gun via an adjusting part, a first driving part for driving the slide to complete an axial gun swinging action is provided on the base, a second driving part for driving the welding arm to complete a radial gun swinging action is provided on the slide, and a third driving part for adjusting the extension length of the welding arm is also provided on the slide.

[0006] Preferably, the sliding portion includes a slide rail, a guide rail, a groove structure, etc.

[0007] In order to enable the welding gun to extend into welding positions of different depths in small-diameter pipes, a splicing portion is provided at the end of the welding arm, and multiple welding arms can be spliced ​​end to end via the splicing portion. The adjusting portion also installs the welding gun at one end or both ends of the welding arm via the splicing portion.

[0008] Specifically, the splicing part includes a socket opened at one end of the welding arm, and the other end of the welding arm and the adjusting part are respectively provided with a connecting piece that can be inserted into the socket. The splicing part also includes a first locking piece for fixing the connecting piece in the socket.

[0009] In order to increase the inner diameter range of pipes that the welding gun is suitable for, the adjustment part includes a mounting seat, the connecting piece is arranged on the mounting seat, a slide groove is provided on the mounting seat, the tail end of the welding gun is slidably connected to the slide groove, and the tail end of the welding gun is provided with a second locking piece for adjusting its fixed position in the slide groove.

[0010] Specifically, the slide comprises a shell, a rotating center is arranged inside the shell, a guide part for installing the welding arm is coaxially arranged on the rotating center, two ends of the guide part penetrate the shell, and the guide part is rotatably connected to the shell.

[0011] Preferably, a bearing is provided between the rotating center and the housing.

[0012] Preferably, the first driving part is installed on the base, and is used to drive the slide to reciprocate along the direction of the sliding part; the second driving part is installed in the outer shell, and is used to drive the rotating center to rotate; the third driving part is installed in the rotating center, and the third driving part can be self-locking, and the third driving part is used to drive the welding arm to reciprocate along the guide part.

[0013] In order to realize the axial swinging movement of the welding gun, the first driving part includes a first motor, a speed regulator is installed on the output shaft of the first motor, a first gear is installed on the output shaft of the speed regulator, the slide is provided with a rack, and the first gear is meshed with the rack.

[0014] In order to realize the radial swinging movement of the welding gun, it is characterized in that the second driving part includes a second motor, the second motor is provided with a second gear, the outer side of the rotating center is provided with a gear ring, and the second gear is meshed with the gear ring.

[0015] In order to facilitate the adjustment of the depth of the welding arm extending into the pipe to be welded, the third driving part includes a third motor, the welding arm is provided with a tooth groove arranged along its axial direction, and the output shaft of the third motor is provided with a worm gear assembly, and the worm gear assembly is connected to the tooth groove via a gear assembly.

[0016] In order to prevent the welding arm from rotating in the guide part, the welding arm is further provided with a limiting groove arranged along its axial direction, and the guide part is provided with a protrusion inserted into the limiting groove, and the protrusion is slidably connected to the limiting groove.

[0017] The beneficial effects of the present invention are:

[0018] 1. The swing of the welding gun is achieved by the combination of the reciprocating movement of the slide along the axial direction of the pipe fitting and the rotation of the welding arm. It can effectively reduce the swing amplitude of the welding gun while ensuring the swing distance of the welding gun head, and effectively solve the problem of small internal space and inconvenience of swinging the welding gun when welding the girth of small-diameter pipe fittings. It provides a convenient welding method for the girth welding of small-diameter pipe fittings, reduces the welding difficulty, and improves the welding efficiency;

[0019] 2. The third driving part can also adjust the depth of the welding arm in the pipe to be welded, so that the welding gun can perform welding work at welding positions at different depths, so that the welding gun swing structure can be applied to more complex welding environments and have better working performance;

[0020] 3. The third motor drives the gear assembly through the worm gear assembly, wherein the worm gear assembly can realize an effective self-locking function after adjusting the extended length of the welding arm, thereby ensuring that the position of the adjusted welding arm is fixed, preventing the distance of the welding arm from changing during welding, causing the center of the welding gun's moving trajectory to shift, thereby ensuring the quality of welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a main axonometric schematic diagram of the present invention;

[0022] Figure 2 It is a full cutaway right side schematic diagram of the present invention;

[0023] Figure 3 is an enlarged schematic diagram of the splicing portion in the present invention;

[0024] Figure 4 The present invention Figure 1 The enlarged schematic diagram of point A in the middle;

[0025] Figure 5 is a schematic top view of the adjustment part of the present invention;

[0026] Figure 6 It is a full cross-sectional front view schematic diagram of the present invention;

[0027] Figure 7 is a schematic diagram of a full cross-section top view of the present invention;

[0028] Figure 8 The present invention Figure 1 Enlarged view of point B in the middle.

[0029] In the figure: 1. base; 2. sliding part; 3. slide; 4. welding arm; 5. adjustment part; 6. welding gun; 7. first driving part; 8. second driving part; 9. third driving part; 10. splicing part; 101. socket; 102. connecting piece; 103. first locking piece; 51. mounting seat; 52. slide groove; 53. second locking piece; 31. housing; 32. rotating center; 33. guide part; 71. first motor; 72. speed regulator; 73. first gear; 74. rack; 81. second motor; 82. second gear; 83. ring gear; 91. third motor; 92. tooth groove; 93. worm gear assembly; 94. gear assembly; 11. limit groove; 12. protrusion. DETAILED DESCRIPTION

[0030] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0031] like Figure 1 As shown, a small-diameter pipe welding welding gun swinging mechanism includes a base 1, characterized in that a slide 3 is slidably connected to the base via a sliding portion 2, a welding arm 4 is provided on the slide 3, and the welding arm 4 is movably connected to a welding gun 6 via an adjusting portion 5, a first driving portion 7 for driving the slide 3 to complete an axial gun swinging action is provided on the base 1, a second driving portion 8 for driving the welding arm 4 to complete a radial gun swinging action is provided on the slide 3, and a third driving portion 9 for adjusting the extension length of the welding arm 4 is also provided on the slide 3.

[0032] When performing girth welding on small-diameter pipe fittings, the welding arm 4 carrying the welding gun 6 is used to extend into the pipe fitting to weld the joint of the pipe fitting, and the swing of the welding gun 6 is achieved by combining the reciprocating movement of the slide 3 along the axial direction of the pipe fitting with the rotation of the welding arm 4. Under the condition of ensuring the swing distance of the head of the welding gun 6, the swing amplitude of the welding gun 6 can be effectively reduced, and the problem of small internal space and inconvenience in swinging the welding gun 6 during girth welding of small-diameter pipe fittings is effectively solved. A convenient welding method is provided for girth welding of small-diameter pipe fittings, which reduces the welding difficulty and improves the welding efficiency.

[0033] In addition, the third driving unit 9 can also adjust the depth of the welding arm 4 in the pipe to be welded, so that the welding gun 6 can weld at welding positions at different depths, so that the swing structure of the welding gun 6 can be suitable for more complex welding environments and have better working performance.

[0034] Preferably, the sliding part 2 includes but is not limited to a slide rail, a guide rail, a groove structure, etc., which is used to guide the movement of the slide 3 and reduce friction.

[0035] See also Figure 2 and Figure 3 The end of the welding arm 4 is provided with a splicing portion 10, and a plurality of welding arms 4 can be spliced ​​end to end via the splicing portion 10, so as to extend or shorten the length of the welding arm 4, so as to be suitable for welding positions of different depths;

[0036] The adjusting portion 5 also installs the welding gun 6 at one end or both ends of the welding arm 4 through the splicing portion 10; the welding gun 6 is also installed on the welding arm 4 through the splicing portion 10, which is convenient for disassembly, assembly and replacement of the welding gun 6, and thus the flexibility of the use of the welding gun 6 swinging mechanism; when the welding gun 6 is installed at one end of the welding arm 4, the welding arm 4 can realize single-sided welding. When the welding gun 6 is installed at both ends of the welding arm 4, the pipe fittings to be welded are installed at both ends of the welding arm 4, and the welding gun 6 is moved to the corresponding position to be welded, which can realize the function of simultaneous welding on both sides, further improve the welding work efficiency, and effectively improve the working performance of the present invention.

[0037] Furthermore, the splicing portion 10 includes a socket 101 provided at one end of the welding arm 4, and a connecting piece 102 which can be inserted into the socket 101 is respectively provided on the other end of the welding arm 4 and the adjusting portion 5, and the splicing portion 10 also includes a first locking piece 103 for fixing the connecting piece 102 in the socket 101;

[0038] When splicing the welding arm 4 or installing the welding gun 6, the connecting piece 102 is inserted into the socket 101, and the first locking piece 103 is used to fix the connecting piece 102 to ensure the stability and strength of the welding arm 4; wherein the connecting piece 102 is rod-shaped, block-shaped, spherical or irregularly shaped, but not limited to the above shapes, the shape of the socket 101 is adapted to the shape of the connecting piece 102, and the cross-sectional shape of the connecting piece 102 includes but is not limited to circular, elliptical, multi-deformed, etc.; wherein the first locking piece 103 includes but is not limited to a pin, a locking screw, a latch or a buckle, etc.

[0039] See also Figure 4 and Figure 5 The adjusting portion 5 comprises a mounting seat 51, the connecting member 102 is arranged on the mounting seat 51, a slide groove 52 is provided on the mounting seat 51, the tail end of the welding gun 6 is slidably connected to the slide groove 52, and the tail end of the welding gun 6 is provided with a second locking member 53 for adjusting its fixed position in the slide groove 52;

[0040] The connecting piece 102 is arranged on the mounting seat 51, and the welding gun 6 can be mounted on the welding arm 4 through the mounting seat 51. At the same time, the welding gun 6 is slidably mounted in the slide groove 52 on the mounting seat 51, and is fixed by the second locking piece 53. Before welding, the eccentricity of the head of the welding gun 6 can be adjusted. Within the limit length range of the slide groove 52, the inner diameter range of the pipe fittings applicable to the welding gun 6 is increased, so as to achieve a wider range of use and improve its practicality. In addition, according to the different inner diameters of the pipe fittings, the welding gun 6 can be replaced through the splicing piece, so that the use is more flexible and changeable, and the adaptability to the working environment is stronger;

[0041] The second locking member 53 also includes but is not limited to a locking screw, a buckle or a latch.

[0042] See also Figure 6 and Figure 7 The slide 3 includes a shell 31, a rotating center 32 is provided in the shell 31, a guide portion 33 for mounting the welding arm 4 is coaxially provided on the rotating center 32, both ends of the guide portion 33 pass through the shell 31, and the guide portion 33 is rotatably connected to the shell 31;

[0043] In the present invention, the shape of the welding arm 4 includes but is not limited to circular, elliptical, and multi-deformed shapes, wherein the guide portion 33 is tubular, and the cross-sectional shape of the guide portion 33 is adapted to the shape of the welding arm 4, ensuring that the welding arm 4 can be smoothly inserted into the guide portion 33, and the guide portion 33 supports and fixes the welding arm 4.

[0044] See also Figure 6 A bearing is provided between the rotating core 32 and the shell 31 to increase the stability of the rotating core 32 rotating in the shell, while reducing the friction force when the rotating core 32 rotates, ensuring that the rotating core 32 can rotate more smoothly.

[0045] Further, the first driving part 7 is installed on the base 1, and is used to drive the slide 3 to reciprocate along the direction of the sliding part 2; the second driving part 8 is installed in the housing, and is used to drive the rotating center 32 to rotate; the third driving part 9 is installed in the rotating center 32, and the third driving part 9 can be self-locking, and the third driving part 9 is used to drive the welding arm 4 to reciprocate along the guide part 33;

[0046] During the welding process, the shell drives the reciprocating movement and rotation of the welding arm 4, and the superposition of the two motion trajectories realizes the control of the swing trajectory of the welding gun 6, wherein the rotation of the welding arm 4 is realized by the rotating core 32 carrying the welding arm 4 to rotate, and the third driving device has a self-locking function. After the welding gun 6 is moved to a suitable position, it can be effectively fixed to prevent the initial position of the welding gun 6 from changing during the rotation of the welding arm 4, resulting in the center of the swing trajectory of the welding gun 6 being offset, and finally causing the welding position to be offset. In this way, the accuracy of the welding position is guaranteed, the quality of welding is further guaranteed, and the mechanical properties and reliability of the equipment are improved.

[0047] See also Figure 1 Figure 6 and Figure 7 The first driving part 7 includes a first motor 71, a speed regulator 72 is installed on the output shaft of the first motor 71, a first gear 73 is installed on the output shaft of the speed regulator 72, and the slide 3 is provided with a rack 74, and the first gear 73 is meshed with the rack 74; the first motor 71 is used as a power source, and is realized in the form of alternating positive and negative rotation. The reciprocating movement of the shell is realized through the structure of the first gear 73 and the rack 74, and by adjusting the frequency of the alternating positive and negative rotation of the first motor 71, the swing amplitude of the welding gun 6 along the axial direction of the pipe to be welded can be adjusted, the trajectory of the welding gun 6 swinging the gun can be changed, and the welding work of a wider weld can be realized, and the speed regulator 72 can adjust the speed of the motor output to a suitable degree, and then transmit it to the slide 3 through the gear, so as to realize better control of the reciprocating speed of the slide 3.

[0048] See also Figure 6 and Figure 7The second driving part 8 includes a second motor 81, a second gear 82 is provided on the second motor 81, a gear ring 83 is provided on the outer side of the rotating center 32, and the second gear 82 is meshed with the gear ring 83;

[0049] The second motor 81 provides power for the rotation of the rotating core 32. The second motor 81 can be a reduction motor. At the same time, like the first motor 71, it can also be connected to an external speed regulator 72 for adjusting the output speed of the second motor 81 to ensure that the second motor 81 can mesh with the ring gear 83 through the second gear 82, so that the rotating core 32 can drive the welding gun 6 on the welding arm 4 to rotate at a suitable speed.

[0050] See also Figure 2 and Figure 6 The third driving part 9 includes a third motor 91, the welding arm 4 is provided with a tooth groove 92 arranged along its axial direction, the output shaft of the third motor 91 is provided with a worm gear assembly 93, and the worm gear assembly 93 is connected to the tooth groove 92 via a gear assembly 94;

[0051] The third motor 91 drives the gear assembly 94 through the worm gear assembly 93, wherein the worm gear assembly 93 can realize an effective self-locking function after adjusting the extended length of the welding arm 4, thereby ensuring that the position of the adjusted welding arm 4 is fixed, preventing the distance of the welding arm 4 from changing during the welding process, causing the center of the moving trajectory of the welding gun 6 to shift, thereby ensuring the quality of welding.

[0052] See also Figure 8 The welding arm 4 is also provided with a limiting groove 11 arranged along its axial direction, and the guide portion 33 is provided with a protrusion 12 inserted into the limiting groove 11, and the protrusion 12 is slidably connected with the limiting groove 11;

[0053] When the cross-section of the welding arm 4 is circular, the protrusion 12 on the guide portion 33 is inserted into the limiting groove 11, which can effectively prevent the gear assembly 94 from rotating when driving the welding arm 4 to move through the tooth groove 92, causing the gear assembly 94 to disengage from the tooth groove 92, thereby ensuring the stability and continuity of the third driving portion 9 moving the welding arm 4, and at the same time increasing the stability of the welding arm 4 during the movement process.

[0054] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A small-diameter pipe welding torch swing mechanism, comprising a base (1), characterized in that: The base (1) is slidably connected to a slide table (3) via a sliding portion (2); a welding arm (4) is provided on the slide table (3); the welding arm (4) is movably connected to a welding gun (6) via an adjusting portion (5); a first driving portion (7) for driving the slide table (3) to complete an axial gun swinging action is provided on the base (1); a second driving portion (8) for driving the welding arm (4) to complete a radial gun swinging action is provided on the slide table (3); and a third driving portion (9) for adjusting the extension length of the welding arm (4) is also provided on the slide table (3); The end of the welding arm (4) is provided with a splicing portion (10), and a plurality of the welding arms (4) can be spliced ​​end to end via the splicing portion (10), and the welding gun (6) is installed at one end or both ends of the welding arm (4); The splicing portion (10) comprises a socket (101) provided at one end of the welding arm (4); the other end of the welding arm (4) and the adjusting portion (5) are respectively provided with a connecting piece (102) which can be inserted into the socket (101); the splicing portion (10) further comprises a first locking piece (103) for fixing the connecting piece (102) in the socket (101); The adjusting portion (5) comprises a mounting seat (51), a slide groove (52) is provided on the mounting seat (51), the tail end of the welding gun (6) is slidably connected to the slide groove (52), and the tail end of the welding gun (6) is provided with a second locking member (53) for adjusting its fixed position in the slide groove (52); The slide (3) comprises a shell (31), a rotating center (32) is arranged inside the shell (31), a guide portion (33) for mounting the welding arm (4) is coaxially arranged on the rotating center (32), two ends of the guide portion (33) pass through the shell (31), and the guide portion (33) is rotatably connected to the shell (31); The first driving part (7) is mounted on the base (1) and is used to drive the slide table (3) to reciprocate along the direction of the sliding part (2); the second driving part (8) is mounted in the housing and is used to drive the rotating center (32) to rotate; the third driving part (9) is mounted in the rotating center (32), the third driving part (9) is self-locking, and is used to drive the welding arm (4) to reciprocate along the guide part (33); The second driving part (8) comprises a second motor (81), the second motor (81) is provided with a second gear (82), a gear ring (83) is provided on the outer side of the rotating center (32), and the second gear (82) is meshed with the gear ring (83); The third driving part (9) comprises a third motor (91), the welding arm (4) is provided with a tooth groove (92) arranged along its axial direction, the output shaft of the third motor (91) is provided with a worm gear assembly (93), and the worm gear assembly (93) is connected to the tooth groove (92) via a gear assembly (94).

2. A small-diameter pipe welding torch swing mechanism as claimed in claim 1, characterized in that: The first driving part (7) comprises a first motor (71), a speed regulator (72) is mounted on the output shaft of the first motor (71), a first gear (73) is mounted on the output shaft of the speed regulator (72), the slide (3) is provided with a rack (74), and the first gear (73) is meshed with the rack (74).

3. A small-diameter pipe welding torch swing mechanism as claimed in claim 1, characterized in that: The welding arm (4) is also provided with a limiting groove (11) arranged along its axial direction, and the guide portion (33) is provided with a protrusion (12) inserted into the limiting groove (11), and the protrusion (12) is slidably connected to the limiting groove (11).

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