Tube sheet fillet angle tooling
By designing an angle fixture for fillet welds in tube sheets, the welding quality problem caused by unstable welding torch angles was solved, achieving stability of welding parameters and high performance of welded components, thereby improving welding quality and service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- API HEAT TRANSFER SUZHOU
- Filing Date
- 2025-08-07
- Publication Date
- 2026-07-10
AI Technical Summary
During the welding of fillet welds in tube sheets, the unstable current output caused by the unstable angle of the welding torch affects the welding quality and the life of the components. In addition, the lack of skilled operation by the welders leads to frequent welding defects.
A tooling fixture for corner welds on tube sheets was designed, including an annular seat, a vertical plate, a rotating shaft, a worm gear mechanism, and a tooling positioning head. Through a sliding structure and an angle adjustment mechanism, it assists the welder in maintaining the appropriate angle and stability between the welding torch and the workpiece, ensuring the consistency of welding parameters.
It improves welding quality, reduces welding defects, enhances the performance and service life of welded components, and in particular mitigates the effects of incomplete penetration depth and failure angle, thereby improving fatigue resistance.
Smart Images
Figure CN224475766U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of welding auxiliary equipment technology, and in particular to angle tooling for tube sheet fillet welds. Background Technology
[0002] During the welding process of fillet welds in tube sheets, due to factors such as the lack of proficiency of workers in operating the welding torch angle, wire feed speed, and tungsten electrode depth, fatigue failures occur continuously in the critical and load-bearing fillet weld components. Among these factors, the incomplete penetration depth, as an initial defect, has the greatest impact on fatigue life, while the failure angle has a significant impact on fatigue life. Under the same stress level, tensile loading has the greatest impact.
[0003] Inexperienced or unskilled welders may encounter interference from electric current or other sources during the welding process, making it difficult to maintain the proper angle between the welding torch and the workpiece surface. Different angles affect the current output, resulting in different heat inputs. This causes welders to change their welding speed while observing the molten pool, ultimately leading to excessively rapid or slow cooling of the molten pool. This further generates welding defects and affects the quality of fillet welds. These problems seriously impact the performance and service life of welded components. Therefore, there is an urgent need for a tooling that can assist welders in maintaining the welding torch angle. Utility Model Content
[0004] The purpose of this invention is to provide a tooling for the angle of fillet welds in tube sheets, so as to solve the problems mentioned in the background art.
[0005] The tube sheet fillet weld angle tooling provided in this application adopts the following technical solution:
[0006] Angle fixture for fillet welds on tube sheets includes an annular seat and a tube sheet component. The annular seat is placed on the surface of the tube sheet component. A vertical plate is mounted on the annular seat via a sliding structure. A rotating shaft is rotatably connected to the outer wall of the vertical plate. A connecting frame is fixedly connected to one end of the rotating shaft. Two fixing rings are fixedly connected to the outer wall of the connecting frame. The two fixing rings are C-shaped and have an installation cylinder inside. A threaded connector is fixedly connected to the bottom outer wall of the installation cylinder. A fixture positioning head is threadedly connected to the outer wall of the threaded connector. The outer wall of the fixture positioning head is tapered. An angle adjustment mechanism is installed on the outer wall of the vertical plate.
[0007] Preferably, the sliding structure includes an annular groove formed on the inner wall of the annular seat, and an arc-shaped slider is fixedly connected to the bottom end of the upright plate. The cross-section of the annular groove is T-shaped, and the arc-shaped slider is adapted to the annular groove and slidably connected to the inner wall of the annular groove.
[0008] Preferably, the angle adjustment mechanism includes a worm gear and a worm, the worm gear and the worm mesh with each other, the worm gear is fixedly connected to the outer wall of the end of the rotating shaft away from the connecting frame, and the worm is rotatably connected to the outer wall of the vertical plate through two bearing seats.
[0009] Preferably, one end of the worm gear passes through one of the bearing seats and is fixedly connected to a knob.
[0010] Preferably, the top outer walls of both fixing rings are threaded with a first locking member, the bottom end of the first locking member passing through the fixing ring and abutting against the outer wall of the mounting cylinder.
[0011] Preferably, the outer wall of the tooling positioning head is threadedly connected to a second locking member, the end of which penetrates and extends into the interior of the tooling positioning head.
[0012] Preferably, the bottom outer wall of the annular seat is bonded with multiple rubber pads, which are evenly distributed in a circumferential array with equal spacing.
[0013] Preferably, the outer wall of the mounting cylinder has an avoidance notch.
[0014] In summary, this application includes the following beneficial technical effects:
[0015] 1. This fillet weld angle fixture can effectively assist welders in maintaining the appropriate angle between the welding torch and the surface of the workpiece. The angle adjustment mechanism can accurately adjust and stabilize the welding torch angle, avoiding fluctuations in the welding torch angle caused by the welder's lack of skill. This can reduce problems such as unstable current output and heat input differences caused by angle changes, thereby reducing the probability of abnormal cooling rate of the molten pool, reducing welding defects such as incomplete penetration, and improving the welding quality of fillet welds, enhancing the performance and service life of welded components.
[0016] 2. The tooling can be adjusted to make the welding torch rotate evenly and stably around the pipe during the welding process, ensuring the consistency of the welding process and reducing the impact of changes in welding speed due to poor welder skills or interference from current. At the same time, its structural design can help control the stability of the welding torch parameters, reduce the impact of initial defects on the fatigue life of the welded components, and especially improve the adverse effects of incomplete penetration depth and failure angle, thereby improving the fatigue resistance of key and load-bearing fillet welded components. Attached Figure Description
[0017] Figure 1 This is an overall schematic diagram of an embodiment of the application;
[0018] Figure 2 This is a three-dimensional schematic diagram of an embodiment of the application;
[0019] Figure 3 This is a partial exploded view of the structure of an embodiment of the application.
[0020] Explanation of reference numerals in the attached drawings: 1. Annular seat; 2. Annular groove; 3. Arc-shaped slider; 4. Vertical plate; 5. Rotating shaft; 6. Connecting frame; 7. Fixing ring; 8. Mounting cylinder; 9. First locking element; 10. Threaded connector; 11. Tooling positioning head; 12. Second locking element; 13. Rubber pad; 14. Worm gear; 15. Shaft seat; 16. Worm; 17. Knob; 18. Tube sheet component; 19. Clearance notch. Detailed Implementation
[0021] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.
[0022] This application discloses an angle fixture for fillet welds on tube sheets. (Refer to...) Figure 1-3 The tube sheet fillet weld angle fixture includes an annular seat 1 and a tube sheet component 18. The annular seat 1 is placed on the surface of the tube sheet component 18. The annular seat 1 is mounted with a vertical plate 4 via a sliding structure. The outer wall of the vertical plate 4 is rotatably connected to a rotating shaft 5. One end of the rotating shaft 5 is fixedly connected to a connecting frame 6. The outer wall of the connecting frame 6 is fixedly connected to two fixing rings 7. The two fixing rings 7 are C-shaped and have an installation cylinder 8 inside. The bottom outer wall of the installation cylinder 8 is fixedly connected to a threaded connector 10. The outer wall of the threaded connector 10 is threadedly connected to a fixture positioning head 11. The outer wall of the fixture positioning head 11 is tapered. An angle adjustment mechanism is installed on the outer wall of the vertical plate 4.
[0023] The sliding structure includes an annular groove 2 formed on the inner wall of the annular seat 1. An arc-shaped slider 3 is fixedly connected to the bottom end of the vertical plate 4. The cross-section of the annular groove 2 is "T" shaped. The arc-shaped slider 3 is adapted to the annular groove 2 and is slidably connected to the inner wall of the annular groove 2. By sliding the arc-shaped slider 3 in the annular groove 2, the vertical plate 4 and the subsequent connected components can be moved to adjust their position in the circumferential direction along the annular seat 1, thereby adapting to the welding requirements of different positions on the tube plate 18. The "T" shaped design of the annular groove 2 and the arc-shaped slider 3 can effectively prevent the arc-shaped slider 3 from falling out of the annular groove 2, ensuring the stability of the sliding process.
[0024] The angle adjustment mechanism includes a worm gear 14 and a worm 16. The worm gear 14 and the worm 16 mesh with each other. The worm gear 14 is fixedly connected to the outer wall of the end of the rotating shaft 5 away from the connecting frame 6. The worm 16 is rotatably connected to the outer wall of the vertical plate 4 through two bearing seats 15. One end of the worm 16 passes through one of the bearing seats 15 and is fixedly connected to a knob 17. When it is necessary to adjust the angle of the tooling positioning head 11, the knob 17 is rotated. The knob 17 drives the worm 16 to rotate. Since the worm 16 meshes with the worm gear 14, the rotation of the worm 16 will drive the worm gear 14 to rotate. The worm gear 14 will then drive the rotating shaft 5 to rotate. The rotation of the rotating shaft 5 will drive the mounting cylinder 8 and the tooling positioning head 11 to rotate together through the connecting frame 6 and other components, thereby realizing the angle adjustment. The meshing of the worm gear 14 and the worm 16 has self-locking properties, which can keep the angle unchanged after the angle is adjusted, ensuring the stability of the angle of the tooling positioning head 11 during the welding process.
[0025] Both fixing rings 7 have a first locking member 9 threadedly connected to their top outer walls. The bottom end of the first locking member 9 passes through the fixing ring 7 and abuts against the outer wall of the mounting cylinder 8. The fixing ring 7 and the first locking member 9 cooperate to quickly fix the mounting cylinder 8. After the mounting cylinder 8 is properly positioned within the fixing ring 7, tighten the first locking member 9 so that the bottom end of the first locking member 9 is tightly against the outer wall of the mounting cylinder 8, thereby fixing the mounting cylinder 8 within the fixing ring 7 and preventing it from shifting during welding. At the same time, the extension length of the mounting cylinder 8 can be adjusted in real time according to the position of the pipe fittings on the tube sheet 18. Simply loosen the first locking member 9, push or pull the mounting cylinder 8 to adjust it to the appropriate extension length, and then tighten the first locking member 9 again.
[0026] The outer wall of the tooling positioning head 11 is threaded with a second locking member 12. The end of the second locking member 12 penetrates and extends into the interior of the tooling positioning head 11. The function of the second locking member 12 is to fix the welding torch head inside the tooling positioning head 11, ensuring that the welding torch head remains stable when rotating and welding around the pipe fitting. After the welding torch head is installed inside the tooling positioning head 11, the second locking member 12 is tightened so that its end is tightly abutted against the outer wall of the welding torch head, thereby firmly fixing the welding torch head and preventing the welding torch head from shaking or shifting during the welding process. The tooling positioning head 11 can be connected by threads. The connector 10 can be quickly replaced with a tooling positioning head 11 with a tapered surface angle of 45°, 60°, or 80° to meet the welding requirements of tube sheet fillet welds at different angles. When replacing, simply loosen the second locking element 12, remove the welding torch head from the original tooling positioning head 11, unscrew the original tooling positioning head 11 from the threaded connector 10, replace it with the tooling positioning head 11 of the required angle and screw it onto the threaded connector 10, and finally put the welding torch head into the new tooling positioning head 11 and tighten the second locking element 12 to easily complete the replacement and thus easily weld tube sheet fillet welds.
[0027] Multiple rubber pads 13 are bonded to the bottom outer wall of the annular seat 1, and the multiple rubber pads 13 are evenly distributed in a circumferential array at equal intervals. The rubber pads 13 can increase the friction between the annular seat 1 and the tube sheet 18, prevent the annular seat 1 from sliding on the surface of the tube sheet 18, and at the same time, the rubber pads 13 can also play a certain buffering role, avoiding hard collisions between the annular seat 1 and the tube sheet 18 and damage to the surface of the tube sheet 18.
[0028] The outer wall of the mounting cylinder 8 is provided with a clearance notch 19. The purpose of the clearance notch 19 is to facilitate the insertion of the welding torch handle into the mounting cylinder 8 to complete the installation of the welding torch head. At the same time, the welding torch handle can be quickly grasped and slid outward within the clearance notch 19 to pull the welding torch out of the mounting cylinder 8 for disassembly. This provides convenience for the installation and disassembly of the welding torch and improves the operating efficiency.
[0029] The implementation principle of the tube sheet fillet weld angle fixture in this embodiment is as follows: In use, first place the annular seat 1 at a suitable position on the tube sheet 18. Increase friction using the rubber pad 13 to prevent slippage. Insert the welding torch into the mounting cylinder 8. The handle on its outside slides within the clearance notch 19, ensuring the mounting cylinder 8 does not obstruct the installation of the welding torch. When the welding torch head enters the fixture positioning head 11, tighten the second locking member 12 to fix the welding torch head. Then, adjust the angle and length of the mounting cylinder 8 according to the size and position of the tube to be welded on the tube sheet 18. When adjusting the angle, rotate the knob 17. The knob 17 drives the worm gear 16 to rotate, which in turn drives the worm wheel 14 to rotate. The worm wheel 14 then drives the rotating shaft 5 to rotate. The rotation of the rotating shaft 5 is transmitted through components such as the connecting frame 6. The moving installation cylinder 8, tooling positioning head 11, and welding torch head rotate together. When adjusting the length, loosen the first locking member 9, push or pull the installation cylinder 8 to the appropriate position, and then tighten the first locking member 9, so that the pipe is located at the axis of the annular seat 1. Then, make the conical surface of the tooling positioning head 11 abut against the outer circumference of the pipe and the top of the tube plate 18 respectively. At this time, welding can be carried out. When welding, push the vertical plate 4 at a uniform speed. Through the sliding structure, make the vertical plate 4 rotate clockwise or counterclockwise on the annular seat 1 once. The vertical plate 4 will drive the welding torch head to weld the pipe on the tube plate 18 evenly. After welding is completed, loosen the second locking member 12, hold the welding torch handle, and let the handle slide outward in the clearance notch 19. The welding torch can then be pulled out from the installation cylinder 8 and tooling positioning head 11 to complete the disassembly.
[0030] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.
[0031] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.
[0032] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. Angle fixture for fillet welds on tube sheets, comprising an annular seat (1) and a tube sheet component (18), characterized in that: The annular seat (1) is placed on the surface of the tube plate (18). The annular seat (1) is equipped with a vertical plate (4) through a sliding structure. The outer wall of the vertical plate (4) is rotatably connected to a rotating shaft (5). One end of the rotating shaft (5) is fixedly connected to a connecting frame (6). The outer wall of the connecting frame (6) is fixedly connected to two fixing rings (7). The two fixing rings (7) are designed in a "C" shape. An installation cylinder (8) is sleeved inside. The bottom outer wall of the installation cylinder (8) is fixedly connected to a threaded connector (10). The outer wall of the threaded connector (10) is threadedly connected to a tooling positioning head (11). The outer wall of the tooling positioning head (11) is tapered. An angle adjustment mechanism is installed on the outer wall of the vertical plate (4).
2. The tube sheet fillet weld angle fixture according to claim 1, characterized in that: The sliding structure includes an annular groove (2) formed on the inner wall of the annular seat (1), and an arc-shaped slider (3) is fixedly connected to the bottom end of the upright plate (4). The cross-section of the annular groove (2) is "T" shaped. The arc-shaped slider (3) is adapted to the annular groove (2) and is slidably connected to the inner wall of the annular groove (2).
3. The tube sheet fillet weld angle fixture according to claim 2, characterized in that: The angle adjustment mechanism includes a worm gear (14) and a worm (16). The worm gear (14) and the worm (16) mesh with each other. The worm gear (14) is fixedly connected to the outer wall of the rotating shaft (5) away from the connecting frame (6). The worm (16) is rotatably connected to the outer wall of the vertical plate (4) through two bearings (15).
4. The tube sheet fillet weld angle fixture according to claim 3, characterized in that: One end of the worm (16) passes through one of the bearings (15) and is fixedly connected to a knob (17).
5. The tube sheet fillet weld angle fixture according to claim 1, characterized in that: The top outer walls of both fixed rings (7) are threaded with a first locking member (9), the bottom end of the first locking member (9) passes through the fixed ring (7) and abuts against the outer wall of the mounting cylinder (8).
6. The tube sheet fillet weld angle fixture according to claim 1, characterized in that: The outer wall of the tooling positioning head (11) is threaded with a second locking member (12), the end of which penetrates and extends into the interior of the tooling positioning head (11).
7. The tube sheet fillet weld angle fixture according to claim 1, characterized in that: Multiple rubber pads (13) are bonded to the bottom outer wall of the annular seat (1), and the multiple rubber pads (13) are evenly distributed in a circumferential array with equal spacing.
8. The tube sheet fillet weld angle fixture according to claim 1, characterized in that: The outer wall of the mounting cylinder (8) is provided with an avoidance notch (19).