Welding tool for annular pipe fitting
By designing the welding tool for annular pipe fittings, the positioning plate, clamp and downward mechanism are used to achieve accurate positioning of the pipe fittings and connectors, solving the problem of position deviation during welding and improving welding accuracy and clearance accuracy.
Patent Information
- Application Number
- CN202411238671.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2022-12-30
- Publication Date
- 2024-12-27
AI Technical Summary
During the circumferential laser welding of annular pipe fittings, the position of the pipe fittings and the connecting head is not easy to fix, and deviations are prone to occur, resulting in difficult to ensure welding accuracy and gap accuracy.
A welding tool for annular pipe fittings is designed, including positioning plates, mounting tables, pipe fittings and connectors. The precise positioning and fixing of pipe fittings and connectors is achieved through clamps, support plates, springs and downcoming mechanisms to ensure the flat body of the pipe fittings. The correct position and clearance of the portion and the tube body during welding.
The position accuracy and gap accuracy of pipe fittings are improved, the welding effect and weld accuracy are improved, and position deviations are avoided during welding.
Smart Images
Figure CN119188088A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of precision parts processing, in particular to a welding tool for an annular pipe fitting. Background Art
[0002] Laser welding is an efficient and precise welding method that uses a high-energy-density laser beam as a heat source. Laser welding is one of the important aspects of the application of laser material processing technology. Due to its unique advantages, it has been successfully applied to the precision welding of micro and small parts. There are two main methods for circumferential laser welding of annular pipes in the prior art: the first is that the laser welding head rotates around the annular pipe to achieve welding of the annular pipe; the second is that the laser welding head is fixed and rotates the annular pipe to achieve welding of the annular pipe.
[0003] In existing production, a pipe fitting and a connector need to be welded using laser, and the assembly gap of the parts weld is very high. When the weld is butt-jointed, the materials on both sides must not overlap, misalign or twist under the premise of ensuring the surface requirements. During the welding process, the position of the pipe fitting and the connector is not easy to fix, and deviation is prone to occur. Summary of the invention
[0004] The purpose of the present invention is to provide a welding tool for an annular pipe fitting, which can improve the position accuracy of the pipe fitting and the gap accuracy between the pipe fitting and the connecting head, thereby improving the overall welding effect and weld accuracy.
[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a welding tool for an annular pipe fitting, comprising: a mounting platform, a positioning plate, a pipe fitting, and a connector, wherein the positioning plate is fixedly mounted on the top of the mounting platform, the pipe fitting comprises a pipe body portion and a flat body portion, an upper surface of the positioning plate is provided with a mounting groove for mounting the pipe body portion of the pipe fitting, and a pressing mechanism for pressing the pipe body portion is provided above the mounting groove; A receiving groove is provided at one end of the positioning plate and perpendicular to the length direction of the installation groove, a support plate is symmetrically installed inside the receiving groove, a clamping block is provided on the opposite sides of the two support plates, a spring is provided between the clamping block and the support plate, and a groove is provided on the opposite side of the clamping block, when the clamping block is clamped, the flat body of the pipe fitting is located between the two grooves; A sink is provided at the front side of the receiving groove, a through groove is provided in the middle position of the sink and extends to the inside of the receiving groove, a positioning block is detachably installed in the through groove, one end of the top of the positioning block is located below the flat body of the pipe fitting, and the other end is detachably installed in the connecting head, a first through hole is provided in the upper part of the positioning block, and a first latch is embedded and installed in the first through hole for connecting the connecting head with the positioning block, second through holes are provided through the left and right surfaces of the positioning plate, and two third through holes are provided at intervals in the lower part of the positioning block, the third through holes are correspondingly connected to the second through holes, and a second latch can pass through the second through hole and the third through hole in sequence to fix the positioning block; A mounting block is provided on the upper surface of the mounting platform and on one side close to the receiving groove, a rotating clamp is fixedly installed on the top of the mounting block, the rotating clamp includes a pressing portion and a clamping portion, the clamping portion having a mounting hole is located above the receiving groove, the mounting hole is provided for a pressing block having a fixing rod to be detachably connected, when the rotating clamp is in a natural state, the flat body portion of the pipe fitting is located between the pressing block and the positioning block.
[0006] The further improved scheme in the above technical scheme is as follows: 1. In the above scheme, the pressing mechanism further includes: a fixed block, a rotating pressure rod, a pressure plate and a driving mechanism, the fixed block with a fourth through hole is installed on one side of the support frame, the driving mechanism is located below the fixed block, and the movable end of the driving mechanism passes upward through the fourth through hole and is fixedly connected to a connecting frame with a sliding rod, one end of the rotating pressure rod is rotatably connected to the fixed block, and the bottom of the other end is connected to the pressure plate, the middle part of the rotating pressure rod has a sliding hole for the sliding rod to connect, and when the driving mechanism is extended, the connecting frame pushes the rotating pressure rod upward to rotate around the axis.
[0007] 2. In the above solution, the driving mechanism is a push cylinder or a telescopic motor.
[0008] 3. In the above solution, the length of the pipe is 1 to 3 times the length of the pressure plate.
[0009] 4. In the above solution, the pressure plate is an aluminum plate.
[0010] 5. In the above solution, a reinforcing rib is provided between the support frame and the mounting platform.
[0011] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: 1. The welding tool of the annular pipe fitting of the present invention has a spring disposed between the clamping block on the positioning plate and the support plate, and a groove is disposed on the opposite side of the clamping block. When the clamping block is clamped, the flat body of the pipe fitting is located between the two grooves, a sink is disposed on the front side of the receiving groove, and a through groove is provided in the middle position of the sink and extends to the inside of the receiving groove. One end of the top of the positioning block is located below the flat body of the pipe fitting, and the other end is provided for the connector to be detachably installed. The clamping portion with the mounting hole is located above the receiving groove, and the mounting hole is provided for a fixing rod The pressing block is detachably connected, and the lower end of the pressing block is located between the two clamping blocks and is in squeeze contact with the flat body of the pipe fitting. The pipe fitting is placed in the installation groove to achieve preliminary positioning of the pipe fitting, and the flat body of the pipe fitting is clamped on the left and right by the clamping blocks. At the same time, the flat body is pressed against the top of the positioning block by the pressing block, and the second mounting piece is fixed to the other end of the positioning block, thereby achieving position fixation of the pipe fitting and the connector, greatly improving the position accuracy of the pipe fitting, and also improving the gap accuracy between the pipe fitting and the connector, thereby improving the overall welding effect.
[0012] 2. The welding tool of the annular pipe fitting of the present invention is provided with a pressing mechanism for pressing the pipe body above the installation groove, and the pressing mechanism includes: a fixed block, a rotating pressure rod, a pressure plate and a driving mechanism. The movable end of the driving mechanism passes upward through a fourth through hole and is fixedly connected to a connecting frame with a sliding rod. One end of the rotating pressure rod is rotatably connected to the fixed block, and the bottom of the other end is connected to a pressure plate. The middle part of the rotating pressure rod has a sliding hole for the sliding rod to connect. When the driving mechanism is extended, the connecting frame pushes the rotating pressure rod upward to rotate around the axis, so that the pipe body of the pipe fitting can be pressed into the installation groove, avoiding the situation where the position of the flat body part is offset due to the arching of the pipe body, thereby further improving the position accuracy of the pipe fitting. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Attached Figure 1 It is a schematic diagram of the overall structure of the welding tooling of the annular pipe fitting of the present invention; Attached Figure 2 The partial structure of the welding tool of the annular pipe of the present invention is shown in FIG. Figure 1 ; Attached Figure 3 The present invention is attached Figure 2 A magnified image of point A; Attached Figure 4 The partial structure of the welding tool of the annular pipe of the present invention is shown in FIG. Figure 2 ; Attached Figure 5 The present invention is attached Figure 4 The enlarged view of point B; Attached Figure 6 The partial structural section of the welding tool of the annular pipe fitting of the present invention is a three-dimensional Figure 1 ; Attached Figure 7The present invention is attached Figure 6 Enlarged view of point C; Attached Figure 8 The partial structural section of the welding tool of the annular pipe fitting of the present invention is a three-dimensional Figure 2 ; Attached Fig. 9 The present invention is attached Figure 8 Enlarged view of point D.
[0014] In the above drawings: 1, positioning plate; 101, mounting groove; 2, support frame; 3, pressing mechanism; 4, fixing block; 41, fourth through hole; 5, rotating pressure rod; 6, pressure plate; 7, driving mechanism; 8, connecting frame; 9, sliding rod; 10, sliding hole; 13, accommodating groove; 14, support plate; 15, clamping block; 16, spring; 17, sink groove; 18, through groove; 19, positioning block; 20, first through hole; 22, first Three-way hole; 23, first latch; 24, second latch; 25, notch groove; 26, mounting block; 27, rotating clamp; 271, pressing portion; 272, clamping portion; 28, mounting hole; 29, fixing rod; 30, pressing block; 31, nut; 32, gasket; 33, groove; 34, mounting platform; 35, reinforcing rib; 100, pipe fitting; 200, pipe body; 300, flat body; 400, connector. DETAILED DESCRIPTION
[0015] The present invention can be further understood through the specific embodiments given below, but they are not intended to limit the present invention.
[0016] Embodiment 1: A welding tool for an annular pipe fitting, comprising: a mounting platform 34, a positioning plate 1, a pipe fitting 100, and a connector 400. The positioning plate 1 is fixedly mounted on the top of the mounting platform 34. The pipe fitting 100 comprises a pipe body 200 and a flat body 300. The upper surface of the positioning plate 1 is provided with a mounting groove 101 for mounting the pipe body 200 of the pipe fitting 100. A pressing mechanism 3 for pressing the pipe body 200 is provided above the mounting groove 101. The pipe fitting is placed in the mounting groove of the positioning plate, thereby achieving preliminary positioning of the pipe fitting. A receiving groove 13 is provided at one end of the positioning plate 1 and perpendicular to the length direction of the installation groove 101. A support plate 14 is symmetrically installed inside the receiving groove 13. A clamping block 15 is provided on the opposite side of the two support plates 14. A spring 16 is provided between the clamping block 15 and the support plate 14. A groove 33 is provided on the opposite side of the clamping block 15. When the clamping block 15 is clamped, the flat body 300 of the pipe fitting 100 is located between the two grooves 33. By pressing the pressing part of the rotating clamping jaw, the clamping end of the rotating clamping jaw is lifted, and the two clamping blocks are pulled apart, and the flat body of the pipe fitting is placed between the two clamping blocks. The clamping blocks are released, and under the action of the two clamping blocks, the flat body is fixed between the grooves of the two clamping blocks, so that the left and right fixation of the flat body is achieved. Then, the rotating clamping jaw is released, so that the pressing block presses the flat body and the positioning block, thereby achieving the position fixation of the flat body, which greatly improves the position accuracy of the pipe fitting. A sink 17 is provided at the front side of the receiving groove 13, and a through groove 18 is provided in the middle position of the sink 17 and extends toward the inside of the receiving groove 13. The through groove 18 is provided for a positioning block 19 to be detachably installed. One end of the top of the positioning block 19 is located below the flat body 300 of the pipe fitting 100, and the other end is provided for a connector 400 to be detachably installed. The connector is fixedly mounted on the other end of the positioning block by the first latch, thereby improving the gap accuracy between the pipe fitting and the connector, and the positioning block and the positioning plate are detachably connected by the second latch, thereby facilitating the rapid disassembly and installation of the positioning block, effectively avoiding the situation in which the positioning block is damaged during the processing and causing the position accuracy of the connector to decrease, facilitating the replacement of the positioning block, thereby ensuring the position accuracy of the connector during long-term use; A mounting block 26 is provided on the upper surface of the mounting platform and on one side close to the receiving groove 13. A rotating clamp 27 is fixedly installed on the top of the mounting block 26. The rotating clamp 27 includes a pressing portion 271 and a clamping portion 272. The clamping portion 272 having a mounting hole 28 is located above the receiving groove 13. The mounting hole 28 is provided for a pressing block 30 having a fixing rod 29 to be detachably connected. When the rotating clamp 27 is in a natural state, the flat body portion 300 of the pipe fitting 100 is located between the pressing block 30 and the positioning block 19.
[0017] The above-mentioned pressing mechanism 3 further includes: a fixed block 4, a rotating pressure rod 5, a pressure plate 6 and a driving mechanism 7. The fixed block 4 with a fourth through hole 41 is installed on one side of the support frame 2, and the driving mechanism 7 is located below the fixed block 4, and the movable end of the driving mechanism 7 passes upward through the fourth through hole 41 and is fixedly connected to a connecting frame 8 with a sliding rod 9. One end of the rotating pressure rod 5 is rotatably connected to the fixed block 4, and the bottom of the other end is connected to the pressure plate 6. The middle part of this rotating pressure rod 5 has a sliding hole 10 for connecting the sliding rod 9. When the driving mechanism 7 is extended, the connecting frame 8 pushes the rotating pressure rod 5 upward to rotate around the axis, so that the tube body of the pipe fitting can be pressed into the installation groove to avoid the situation where the tube body is arched and the position of the flat body is offset, thereby further improving the position accuracy of the pipe fitting.
[0018] The driving mechanism 7 is a push cylinder.
[0019] The length of the above-mentioned pipe is twice the length of the pressing plate 6.
[0020] The pressing plate 6 is an aluminum plate.
[0021] The fixing rod 29 is a screw rod, which is located at the upper and lower sides of the clamping portion 272 and has a nut 31 mounted on the outer wall of the fixing rod 29 .
[0022] A first through hole 20 is provided at the upper portion of the positioning block 19, and a first latch 23 can be embedded and installed in the first through hole 20, so as to connect the connector 400 to the positioning block 19; second through holes are provided through the left and right surfaces of the positioning plate 1, and two third through holes 22 are provided at intervals at the lower portion of the positioning block 19, and the third through holes 22 are correspondingly connected to the second through holes, and a second latch 24 can pass through the second through hole and the third through hole 22 in sequence to fix the positioning block 19.
[0023] A supporting frame 2 is disposed at the bottom of the positioning plate 1 .
[0024] A reinforcing rib 35 is disposed between the support frame 2 and the mounting platform 34 .
[0025] Embodiment 2: A welding tool for an annular pipe fitting, comprising: a mounting platform 34, a positioning plate 1, a pipe fitting 100, and a connector 400, wherein the positioning plate 1 is fixedly mounted on the top of the mounting platform 34, the pipe fitting 100 comprises a pipe body 200 and a flat body 300, and an upper surface of the positioning plate 1 is provided with a mounting groove 101 for mounting the pipe body 200 of the pipe fitting 100, and a pressing mechanism 3 for pressing the pipe body 200 is provided above the mounting groove 101; The pipe fitting is placed in the installation groove to realize the preliminary positioning of the pipe fitting, and the flat body of the pipe fitting is clamped on the left and right by the clamping block, and the flat body is pressed on the top of the positioning block by the pressing block, and the second mounting piece is fixed to the other end of the positioning block, so that the position of the pipe fitting and the connector is fixed, which greatly improves the position accuracy of the pipe fitting and the gap accuracy between the pipe fitting and the connector, thereby improving the overall welding effect; A receiving groove 13 is provided at one end of the positioning plate 1 and perpendicular to the length direction of the installation groove 101. A support plate 14 is symmetrically installed inside the receiving groove 13. A clamping block 15 is provided on the opposite side of the two support plates 14. A spring 16 is provided between the clamping block 15 and the support plate 14. A groove 33 is provided on the opposite side of the clamping block 15. When the clamping block 15 is clamped, the flat body 300 of the pipe fitting 100 is located between the two grooves 33. The fixing rod is passed through the mounting hole and fixed to the mounting hole by two nuts, so that the pressing block can be quickly disassembled and installed, which effectively avoids the situation that the pressing force of the pressing block on the pipe fitting changes and causes position deviation due to damage of the pressing block during processing, and facilitates the replacement of the pressing block, thereby ensuring the position accuracy of the pipe fitting during long-term use; A sink 17 is provided at the front side of the receiving groove 13, and a through groove 18 is provided in the middle position of the sink 17 and extends toward the inside of the receiving groove 13. The through groove 18 is provided for a positioning block 19 to be detachably installed. One end of the top of the positioning block 19 is located below the flat body 300 of the pipe fitting 100, and the other end is provided for a connector 400 to be detachably installed. The movable end of the driving mechanism pushes the connecting frame upward, so that the connecting frame moves upward, and drives the sliding rod to move upward along the sliding hole. During the upward movement of the sliding rod, the rotating clamping claw is pushed to rotate and open, and the rotating clamping claw rotates around the connecting shaft of the fixed block, and the pressing effect on the pipe body is lost, which makes it easier for personnel to take out the pipe fittings. A mounting block 26 is disposed on the upper surface of the mounting platform and on one side close to the receiving groove 13. A rotating clamp 27 is fixedly mounted on the top of the mounting block 26. The rotating clamp 27 includes a pressing portion 271 and a clamping portion 272. The clamping portion 272 having a mounting hole 28 is located above the receiving groove 13. The mounting hole 28 is provided for a pressing block 30 having a fixing rod 29 to be detachably connected. When the rotating clamp 27 is in a natural state, the flat body portion 300 of the pipe fitting 100 is located between the pressing block 30 and the positioning block 19. The movable end of the driving mechanism pushes the connecting frame downward, so that the connecting frame moves downward and drives the slide bar to move downward along the slide hole. During the downward movement of the slide bar, the rotating clamp is pushed to rotate and close, so that the pressure plate presses the tube body into the installation groove.
[0026] The above-mentioned pressing mechanism 3 further includes: a fixed block 4, a rotating pressure rod 5, a pressure plate 6 and a driving mechanism 7. The fixed block 4 with a fourth through hole 41 is installed on one side of the support frame 2, and the driving mechanism 7 is located below the fixed block 4, and the movable end of the driving mechanism 7 passes upward through the fourth through hole 41 and is fixedly connected to a connecting frame 8 with a sliding rod 9. One end of the rotating pressure rod 5 is rotatably connected to the fixed block 4, and the bottom of the other end is connected to the pressure plate 6. The middle part of this rotating pressure rod 5 has a sliding hole 10 for connecting the sliding rod 9. When the driving mechanism 7 is extended, the connecting frame 8 pushes the rotating pressure rod 5 upward to rotate around the axis.
[0027] The driving mechanism 7 is a telescopic motor.
[0028] The length of the above-mentioned pipe is 2.5 times the length of the pressing plate 6.
[0029] The fixing rod 29 is a screw rod, which is located at the upper and lower sides of the clamping portion 272 and has a nut 31 sleeved on the outer wall of the fixing rod 29 ; a gasket 32 is provided between the nut 31 and the clamping portion 272 .
[0030] A first through hole 20 is provided at the upper portion of the positioning block 19, and a first latch 23 can be embedded and installed in the first through hole 20, so as to connect the connector 400 to the positioning block 19; second through holes are provided through the left and right surfaces of the positioning plate 1, and two third through holes 22 are provided at intervals at the lower portion of the positioning block 19, and the third through holes 22 are correspondingly connected to the second through holes, and a second latch 24 can pass through the second through hole and the third through hole 22 in sequence to fix the positioning block 19.
[0031] The top of the positioning block 19 has a notch groove 25 for welding the pipe fitting 100 and the connector 400 .
[0032] The mounting groove 101 is a V-shaped groove.
[0033] The working principle of the present invention is as follows: When in use, the pipe fitting is placed into the installation groove of the positioning plate to achieve preliminary positioning of the pipe fitting; Next, by pressing the pressing part of the rotating clamping jaw, the clamping end of the rotating clamping jaw is lifted, and the two clamping blocks are pulled apart, the flat body of the pipe fitting is placed between the two clamping blocks, and the clamping blocks are released. Under the action of the two clamping blocks, the flat body is fixed between the grooves of the two clamping blocks, and the left and right fixation of the flat body is achieved. Then, the rotating clamping jaw is released, so that the pressing block presses the flat body and the positioning block, thereby achieving the position fixation of the flat body, which greatly improves the position accuracy of the pipe fitting. The connecting head is fixedly installed on the other end of the positioning block by the first latch, thereby improving the gap accuracy between the pipe fitting and the connecting head, and the positioning block and the positioning plate are detachably connected by the second latch, so that it is convenient to quickly disassemble and install the positioning block, effectively avoiding the situation that the positioning block is damaged during the processing and the position accuracy of the connecting head is reduced, and it is convenient to replace the positioning block, thereby ensuring the position accuracy of the connecting head during long-term use; the fixing rod is passed through the mounting hole and the fixing rod is fixed to the mounting hole by two nuts, thereby facilitating the quick disassembly and installation of the pressing block, effectively avoiding the situation that the pressing block is damaged during the processing and the pressure holding force of the pressing block on the pipe fitting is changed and the position is offset, and it is convenient to replace the pressing block, thereby ensuring the position accuracy of the pipe fitting during long-term use; The movable end of the driving mechanism pushes the connecting frame upward, causing the connecting frame to move upward and driving the sliding rod to move upward along the sliding hole. During the upward movement of the sliding rod, the rotating claw is pushed to rotate and open, and the rotating claw rotates around the connecting shaft of the fixed block, thereby losing the pressing effect on the pipe body, making it easier for personnel to take out the pipe fittings. The movable end of the driving mechanism pushes the connecting frame downward, causing the connecting frame to move downward and driving the sliding rod to move downward along the sliding hole. During the downward movement of the sliding rod, the rotating claw is pushed to rotate and close, so that the pressure plate presses the pipe body into the installation groove.
[0034] When the welding tooling of the above-mentioned annular pipe fitting is used, the pipe fitting is placed in the installation groove to achieve preliminary positioning of the pipe fitting, and the flat body of the pipe fitting is clamped on the left and right by the clamping blocks, and the flat body is pressed on the top of the positioning block by the pressing block, and the second mounting piece is fixed to the other end of the positioning block, thereby achieving position fixation of the pipe fitting and the connecting head, greatly improving the position accuracy of the pipe fitting, and also improving the gap accuracy between the pipe fitting and the connecting head, thereby improving the overall welding effect; further, it can realize pressing the pipe body of the pipe fitting into the installation groove to avoid the situation where the position of the flat body is offset due to the arching of the pipe body, thereby further improving the position accuracy of the pipe fitting.
[0035] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.
Claims
1. A welding tool for an annular pipe, characterized in that: include: A mounting platform (34), a positioning plate (1), a pipe fitting (100), and a connector (400), wherein the positioning plate (1) is fixedly mounted on the top of the mounting platform (34), the pipe fitting (100) comprises a pipe body portion (200) and a flat body portion (300), and the upper surface of the positioning plate (1) is provided with a mounting groove (101) for mounting the pipe body portion (200) of the pipe fitting (100), and a pressing mechanism (3) for pressing the pipe body portion (200) is provided above the mounting groove (101); A receiving groove (13) is provided at one end of the positioning plate (1) and perpendicular to the length direction of the installation groove (101); a support plate (14) is symmetrically installed inside the receiving groove (13); a clamping block (15) is provided on opposite sides of the two support plates (14); a spring (16) is provided between the clamping block (15) and the support plate (14); a groove (33) is provided on the opposite side of the clamping block (15); when the clamping block (15) is clamped, the flat body (300) of the pipe fitting (100) is located between the two grooves (33); A sink (17) is provided at the front side of the accommodating groove (13), and a through groove (18) is provided in the middle position of the sink (17) and extends toward the inside of the accommodating groove (13). The through groove (18) is provided for a positioning block (19) to be detachably installed. One end of the top of the positioning block (19) is located below the flat body (300) of the pipe fitting (100), and the other end is provided for a connector (400) to be detachably installed. A first through hole is provided at the top of the positioning block (19). (20), the first through hole (20) can be used for a first latch (23) to be embedded and installed, and is used to connect the connector (400) to the positioning block (19), the left and right surfaces of the positioning plate (1) are penetrated with second through holes, and two third through holes (22) are spaced apart at the lower part of the positioning block (19), the third through holes (22) are correspondingly connected to the second through holes, and a second latch (24) can pass through the second through hole and the third through hole (22) in sequence to fix the positioning block (19); A mounting block (26) is provided on the upper surface of the mounting platform (34) and on a side close to the receiving groove (13). A rotating clamp (27) is fixedly mounted on the top of the mounting block (26). The rotating clamp (27) comprises a pressing portion (271) and a clamping portion (272). The clamping portion (272) has a mounting hole (28) and is located above the receiving groove (13). The mounting hole (28) is provided for a pressing block (30) having a fixing rod (29) to be detachably connected. When the rotating clamp (27) is in a natural state, the flat body portion (300) of the pipe fitting (100) is located between the pressing block (30) and the positioning block (19).
2. The welding tool for annular pipe according to claim 1, characterized in that: The pressing mechanism (3) further comprises: a fixed block (4), a rotating pressure rod (5), a pressure plate (6) and a driving mechanism (7); the fixed block (4) having a fourth through hole (41) is mounted on one side of the support frame (2); the driving mechanism (7) is located below the fixed block (4); and the movable end of the driving mechanism (7) passes upward through the fourth through hole (41) and is fixedly connected to a connecting frame (8) having a sliding rod (9); one end of the rotating pressure rod (5) is rotatably connected to the fixed block (4); the bottom of the other end is connected to the pressure plate (6); the middle part of the rotating pressure rod (5) has a sliding hole (10) for connecting the sliding rod (9); when the driving mechanism (7) is extended, the connecting frame (8) pushes the rotating pressure rod (5) upward to rotate around the axis.
3. The welding tool for annular pipe according to claim 2, characterized in that: The driving mechanism (7) is a push-up cylinder or a telescopic motor.
4. The welding tool for annular pipe according to claim 2, characterized in that: The length of the pipe (100) is 1 to 3 times the length of the pressing plate (6).
5. The welding tool for annular pipe according to claim 2, characterized in that: The pressing plate (6) is an aluminum plate.
6. The welding tool for annular pipe according to claim 1, characterized in that: A reinforcing rib (35) is provided between the support frame (2) and the mounting platform (34).