Friction stir welding water cooling plate welding tool bit with self-cleaning function

Abstract

The friction stir welding water cooling plate welding tool bit with the self-cleaning function comprises a mounting sleeve, a stirring rod is arranged in the mounting sleeve, and a stirring needle is arranged at the bottom end of the stirring rod; a plurality of groups of cleaning pipelines are arranged in the mounting sleeve, the plurality of groups of cleaning pipelines are arranged in an annular array by taking the axis of the stirring rod as the axis, air outlets of the cleaning pipelines are arranged towards the direction of the stirring needle, and an air inlet assembly is further arranged outside the mounting sleeve; the cleaning device has the beneficial effects that the plurality of groups of cleaning pipelines which are arranged in the mounting sleeve and are distributed in the annular array by taking the axis of the stirring rod as the axis are matched with the gas inlet assembly communicated with an external high-pressure gas source, so that high-pressure gas can be continuously or directionally guided to the surface of the stirring needle; the structure effectively solves the problem that chippings, oxides or impurities are attached and accumulated on the stirring needle and the surface of a welding area in the welding process.

Description

Technical Field

[0001] This utility model relates to a welding cutter head for water-cooled plates with self-cleaning friction stir welding function. Background Technology

[0002] Friction stir welding technology has significant advantages in the field of water-cooled plate welding, especially in welding lightweight materials such as aluminum alloys, where it can achieve high-strength, low-deformation connections.

[0003] However, during the welding process, the high-speed rotation of the stirring pin and its insertion into the workpiece generate frictional heat, which easily leads to the continuous adhesion of metal debris, oxides, and environmental impurities to the surface of the stirring pin and the welding area. As these deposits accumulate with the welding process, impurities can be drawn into the weld, forming defects such as holes and inclusions, which severely reduce the sealing performance and mechanical properties of the water-cooled plate. Moreover, at high temperatures, impurities react chemically with the surface of the stirring pin, which can accelerate tool wear and even soften and fail. In view of this, this utility model proposes a stirring friction welding water-cooled plate welding head with a self-cleaning function to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a welding cutter head for water-cooled plates with self-cleaning friction stir welding, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A self-cleaning friction stir welding cutter for water-cooled plates includes a mounting sleeve, a stirring rod is provided inside the mounting sleeve, and a stirring needle is provided at the bottom end of the stirring rod.

[0007] The mounting sleeve has multiple sets of cleaning pipes inside, which are arranged in a circular array around the axis of the stirring rod. The air outlet of the cleaning pipe is facing the stirring needle. An air inlet assembly is also provided on the outside of the mounting sleeve. The air inlet assembly is connected to the cleaning pipes, so that high-pressure gas is introduced to the surface of the stirring needle through the cleaning pipes.

[0008] As an improvement to the above technical solution, a clamping handle is provided at the top of the stirring rod;

[0009] The mounting sleeve has an internal hexagonal groove, and an external hexagonal block is fixedly installed on the outer wall of the clamping handle. The external hexagonal block is adapted to the internal hexagonal groove, and the external hexagonal block is placed in the internal hexagonal groove so that the stirring needle is placed at the bottom end of the mounting sleeve.

[0010] As an improvement to the above technical solution, the internal hexagonal slot has multiple sets of first mounting holes, and the external hexagonal block has multiple sets of second mounting holes. The positions and sizes of the multiple sets of first mounting holes and the multiple sets of second mounting holes are matched, and the first mounting holes and the second mounting holes are connected by bolts.

[0011] As an improvement to the above technical solution, the mounting sleeve is provided with a mounting through groove, the stirring rod is adapted to the mounting through groove, and the stirring needle is placed at the bottom end of the mounting sleeve through the mounting through groove.

[0012] As an improvement to the above technical solution, the mounting sleeve is provided with a first annular groove and a second annular groove, the first annular groove and the second annular groove are symmetrically arranged, and the first annular groove and the second annular groove are coaxially arranged with the mounting sleeve;

[0013] Multiple sets of connecting pipes are provided between the first annular groove and the second annular groove. The multiple sets of connecting pipes are arranged in a circular array around the axis of the mounting sleeve. The cleaning pipe is connected to the second annular groove.

[0014] As an improvement to the above technical solution, the mounting groove is located at the center of the first annular groove and the second annular groove;

[0015] The connecting pipe has multiple sets of heat dissipation slots, which are oriented toward the mounting through slot.

[0016] As an improvement to the above technical solution, multiple sets of air inlets are provided inside the mounting sleeve. The multiple sets of air inlets are arranged in a circular array around the axis of the mounting sleeve, and the air inlets are connected to the inner cavity of the first annular groove.

[0017] As an improvement to the above technical solution, the air intake assembly includes a movable sleeve, which is rotatably sealed on the outer wall of the mounting sleeve, and an air intake pipe is provided on the movable sleeve.

[0018] An air intake cavity is provided between the movable sleeve and the mounting sleeve, and the air intake cavity is connected to the air intake hole.

[0019] As an improvement to the above technical solution, a shoulder is provided on the mounting sleeve;

[0020] The mounting sleeve is also provided with a cleaning ring groove, and the cleaning pipe is set in the cleaning ring groove. The cleaning ring groove is coaxial with the shaft shoulder.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] By setting multiple sets of cleaning pipes inside the mounting sleeve and arranged in a ring array around the axis of the stirring rod, and in conjunction with the air intake component connected to the external high-pressure air source, high-pressure gas can be continuously or directionally introduced to the surface of the stirring pin. This structure effectively solves the problem of debris, oxides or impurities adhering and accumulating on the surface of the stirring pin and welding area during the welding process, realizing active real-time cleaning of the working area of ​​the cutting head, and significantly improving the continuous operation capability and process stability of the equipment.

[0023] By setting the pipe outlet towards the stirring needle, the continuous purging of high-pressure gas not only removes impurities but also blows away contaminants around the weld pool during the welding process, effectively preventing impurities from being drawn into the weld. This directly ensures the purity of the weld metal and reduces the generation of welding defects (such as holes and inclusions), thereby significantly improving the mechanical properties and sealing reliability of the water-cooled plate friction stir welded joint.

[0024] While the high-pressure gas is purging and cleaning, it flows over the high-temperature stirring pin and the surface of the welding area, which can accelerate the heat dissipation of the area and achieve forced convection cooling. This integrated air cooling mechanism effectively reduces the working temperature of the stirring pin tip, inhibits tool wear and softening caused by overheating, extends the service life of the cutting head, and helps to maintain stable welding heat input and optimize the welding heat cycle process. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a side view of the present invention;

[0027] Figure 3 This utility model Figure 2 Sectional view of AA;

[0028] Figure 4 This utility model Figure 3 A cross-sectional view of the mounting sleeve;

[0029] Figure 5 This is a schematic diagram of the structure of the mounting sleeve of this utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the stirring rod of this utility model;

[0031] Figure 7 This is a schematic diagram showing the position of the shoulder of this utility model.

[0032] In the diagram: 10. Intake assembly; 11. Intake pipe; 12. Intake chamber; 13. Movable sleeve; 20. Mounting sleeve; 21. Mounting through groove; 22. Internal hexagonal groove; 221. First mounting hole; 23. First annular groove; 24. Intake hole; 25. Connecting pipe; 26. Heat dissipation groove; 27. Second annular groove; 28. Cleaning pipe; 29. ​​Cleaning annular groove; 30. Clamping handle; 31. External hexagonal block; 311. Second mounting hole; 40. Stirring rod; 50. Stirring needle; 60. Shoulder. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Example:

[0035] like Figure 1-7 As shown, this embodiment proposes a welding head for water-cooled plates with self-cleaning friction stir welding, including a mounting sleeve 20, a stirring rod 40 is provided inside the mounting sleeve 20, and a stirring needle 50 is provided at the bottom end of the stirring rod 40;

[0036] The mounting sleeve 20 has multiple sets of cleaning pipes 28 inside, and the multiple sets of cleaning pipes 28 are arranged in a circular array around the axis of the stirring rod 40. The air outlet of the cleaning pipe 28 is arranged towards the stirring needle 50. The mounting sleeve 20 is also provided with an air inlet assembly 10, which is connected to the cleaning pipes 28, so that high-pressure gas is introduced into the surface of the stirring needle 50 through the cleaning pipes 28.

[0037] In this case, the preferred high-pressure gas is an inert gas.

[0038] In this embodiment, when performing friction stir welding on the water-cooled plate, the air intake assembly 10 is connected to an external high-pressure air supply device (such as an industrial air compressor), so that high-pressure gas enters the cleaning pipe 28 through the air intake assembly 10, thereby allowing the high-pressure gas to be introduced to the surface of the stirring pin 50 through the cleaning pipe 28 to clean the dust on the surface of the stirring pin 50. Of course, during the water-cooled plate welding process, the cleaning pipe 28 continuously provides high-pressure gas to continuously blow the welding area, and at the same time, the heat dissipation process is completed during the blowing process.

[0039] By setting multiple sets of cleaning pipes 28 inside the mounting sleeve 20 and arranged in a ring array around the axis of the stirring rod 40, and in conjunction with the air intake component 10 connected to the external high-pressure air source, high-pressure gas can be continuously or directionally introduced to the surface of the stirring pin 50. This structure effectively solves the problem of debris, oxides or impurities adhering and accumulating on the surface of the stirring pin 50 and the welding area during the welding process, realizing active real-time cleaning of the working area of ​​the cutting head, and significantly improving the continuous operation capability and process stability of the equipment.

[0040] By setting the outlet of the cleaning pipe 28 toward the stirring pin 50, the continuous purging of high-pressure gas not only removes impurities, but also blows away contaminants around the weld pool during the welding process, effectively preventing impurities from being drawn into the weld. This directly ensures the purity of the weld metal and reduces the generation of welding defects such as holes and inclusions, thereby significantly improving the mechanical properties and sealing reliability of the water-cooled plate friction stir welded joint.

[0041] While the high-pressure gas is purging and cleaning, it flows over the high-temperature stirring pin 50 and the surface of the welding area, which can accelerate the heat dissipation of the area and achieve forced convection cooling. This integrated air cooling mechanism effectively reduces the working temperature of the tip of the stirring pin 50, inhibits tool wear and softening caused by overheating, extends the service life of the cutting head, and helps to maintain stable welding heat input and optimize the welding heat cycle process.

[0042] Specifically, the top end of the stirring rod 40 is provided with a clamping handle 30;

[0043] The mounting sleeve 20 has an internal hexagonal groove 22, and the outer wall of the clamping handle 30 is fixedly provided with an external hexagonal block 31. The external hexagonal block 31 is adapted to the internal hexagonal groove 22. The external hexagonal block 31 is placed in the internal hexagonal groove 22, so that the stirring needle 50 is placed at the bottom end of the mounting sleeve 20.

[0044] In this embodiment, the stirring rod 40 is strictly constrained in the radial and axial directions by the multi-plane meshing structure of the outer hexagonal block 31 on the outer wall of the clamping handle 30 and the inner hexagonal groove 22 of the mounting sleeve 20. This design ensures that the stirring needle 50 and the bottom end of the mounting sleeve 20 are precisely coaxially aligned, and the uniform force distribution of the hexagonal meshing surface can efficiently transmit the welding torque.

[0045] Specifically, the internal hexagonal slot 22 has multiple sets of first mounting holes 221, and the external hexagonal block 31 has multiple sets of second mounting holes 311. The positions and sizes of the multiple sets of first mounting holes 221 and the multiple sets of second mounting holes 311 are matched, and the first mounting holes 221 and the second mounting holes 311 are connected by bolts.

[0046] In this embodiment, a three-dimensional constraint system of axial locking, radial force transmission, and end face sealing is constructed by connecting the internal hexagonal slot 22 with multiple sets of matching first mounting holes 221 and second mounting holes 311 on the external hexagonal block 31 and bolts. This design ensures efficient torque transmission of the hexagonal meshing structure while giving the tool head modular and rapid maintenance capabilities.

[0047] Specifically, the mounting sleeve 20 is provided with a mounting groove 21, the stirring rod 40 is adapted to the mounting groove 21, and the stirring needle 50 is placed at the bottom end of the mounting sleeve 20 through the mounting groove 21.

[0048] In this embodiment, by providing an installation through groove 21 that precisely matches the stirring rod 40 inside the installation sleeve 20, a triple functional carrier is constructed, which serves as an axial positioning reference, a mechanical transmission space, and a heat dissipation conduction path. This structure ensures that the stirring pin 50 is precisely positioned at the bottom of the installation sleeve 20 with a constant extension length, while providing full circumferential rigid support for the stirring rod 40 to resist welding loads.

[0049] Specifically, the mounting sleeve 20 has a first annular groove 23 and a second annular groove 27. The first annular groove 23 and the second annular groove 27 are symmetrically arranged and are coaxial with the mounting sleeve 20.

[0050] Multiple sets of connecting pipes 25 are provided between the first annular groove 23 and the second annular groove 27. The multiple sets of connecting pipes 25 are arranged in a ring array with the axis of the mounting sleeve 20. The cleaning pipe 28 is connected to the second annular groove 27.

[0051] In this embodiment, when high-pressure gas is introduced, the high-pressure gas passes through the first annular groove 23 and the connecting pipe 25 in sequence and is discharged from the cleaning pipe 28.

[0052] A high-pressure gas circuit hub integrating graded pressure stabilization, uniform distribution, rigid reinforcement and thermal management is constructed through the coaxially symmetrical first annular groove 23, second annular groove 27 and annular array connecting pipe 25. This structure transforms point-based gas supply into area-wide pressure equalization, ensuring the consistency of output airflow parameters of each cleaning pipe 28 and completely eliminating welding cleaning dead corners.

[0053] Specifically, the mounting groove 21 is located at the center of the first annular groove 23 and the second annular groove 27;

[0054] Multiple sets of heat dissipation slots 26 are provided on the connecting pipe 25, and the heat dissipation slots 26 are arranged in the direction of the mounting through slot 21.

[0055] In this embodiment, the heat dissipation groove 26 can provide the inner wall area of ​​the connecting pipe 25. Since the connecting pipe 25 is arranged in a ring array outside the stirring rod 40, it is convenient for the stirring rod 40 to transfer heat to the heat dissipation groove 26 and the connecting pipe 25 through the installation groove 21. When high pressure gas passes through, it can carry away the heat generated by stirring friction.

[0056] The heat dissipation mechanism of the heat sink 26 can reduce thermal fatigue damage to the stirring rod 40 and stirring pin 50, so that the cutter head can maintain its structural integrity under high temperature and high load conditions.

[0057] Specifically, the mounting sleeve 20 has multiple sets of air inlets 24, which are arranged in a ring array around the axis of the mounting sleeve 20, and the air inlets 24 are connected to the inner cavity of the first annular groove 23.

[0058] Specifically, the air intake assembly 10 includes a movable sleeve 13, which is rotatably sealed on the outer wall of the mounting sleeve 20, and an air intake pipe 11 is provided on the movable sleeve 13.

[0059] An air intake cavity 12 is provided between the movable sleeve 13 and the mounting sleeve 20, and the air intake cavity 12 is connected to the air intake hole 24.

[0060] In this embodiment, during the cleaning process, the air inlet pipe 11 is connected to a high-pressure air supply device (such as an industrial-grade air compressor). When the mounting sleeve 20 rotates, the high-pressure gas passes through the air inlet pipe 11, the air inlet chamber 12, the air inlet hole 24, the first annular groove 23, the connecting pipe 25, the second annular groove 27, and the cleaning pipe 28 in sequence. This effectively solves the sealing technical problem of continuously and stably introducing external air sources into the rotating cutter head under dynamic working conditions, and ensures the uninterrupted operation of the self-cleaning function during the welding process.

[0061] Specifically, the mounting sleeve 20 is provided with a shoulder 60;

[0062] The mounting sleeve 20 is also provided with a cleaning annular groove 29, and the cleaning pipe 28 is disposed in the cleaning annular groove 29. The cleaning annular groove 29 is coaxially disposed with the shoulder 60.

[0063] In this embodiment, the cleaning annular groove 29 is designed so that the opening of the cleaning pipe 28 is not flush with the shoulder 60, which facilitates the discharge of high-pressure gas. This achieves a non-coplanar layout between the airflow outlet and the end face of the shoulder 60, ensuring that the airflow covers the working area of ​​the stirring needle 50 without obstruction at a preset spray angle.

[0064] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding tip for water-cooled plates with self-cleaning friction stir welding function, characterized in that: Includes an installation sleeve (20), inside which is provided a stirring rod (40), and at the bottom end of the stirring rod (40) is a stirring needle (50). The mounting sleeve (20) has multiple sets of cleaning pipes (28) inside. The multiple sets of cleaning pipes (28) are arranged in a ring array around the axis of the stirring rod (40). The air outlet of the cleaning pipe (28) is arranged towards the stirring needle (50). An air inlet assembly (10) is also provided on the outside of the mounting sleeve (20). The air inlet assembly (10) is connected to the cleaning pipes (28) so that high-pressure gas is introduced into the surface of the stirring needle (50) through the cleaning pipes (28).

2. The self-cleaning friction stir welding cutter head for water-cooled plates according to claim 1, characterized in that: The top end of the stirring rod (40) is provided with a clamping handle (30). The mounting sleeve (20) has an internal hexagonal groove (22), and an external hexagonal block (31) is fixedly provided on the outer wall of the clamping handle (30). The external hexagonal block (31) is adapted to the internal hexagonal groove (22), and the external hexagonal block (31) is placed in the internal hexagonal groove (22), so that the stirring needle (50) is placed at the bottom end of the mounting sleeve (20).

3. The self-cleaning friction stir welding cutter head for water-cooled plates according to claim 2, characterized in that: The internal hexagonal slot (22) has multiple sets of first mounting holes (221), and the external hexagonal block (31) has multiple sets of second mounting holes (311). The positions and sizes of the multiple sets of first mounting holes (221) and the multiple sets of second mounting holes (311) are matched, and the first mounting holes (221) and the second mounting holes (311) are connected by bolts.

4. The self-cleaning friction stir welding cutter head for water-cooled plates according to claim 1, characterized in that: The mounting sleeve (20) is provided with a mounting groove (21), the stirring rod (40) is adapted to the mounting groove (21), and the stirring needle (50) is placed at the bottom of the mounting sleeve (20) through the mounting groove (21).

5. The self-cleaning friction stir welding cutter head for water-cooled plates according to claim 4, characterized in that: The mounting sleeve (20) is provided with a first annular groove (23) and a second annular groove (27). The first annular groove (23) and the second annular groove (27) are symmetrically arranged and are coaxial with the mounting sleeve (20). Multiple sets of connecting pipes (25) are provided between the first annular groove (23) and the second annular groove (27). The multiple sets of connecting pipes (25) are arranged in an annular array with the axis of the mounting sleeve (20). The cleaning pipe (28) is connected to the second annular groove (27).

6. The self-cleaning friction stir welding cutter head for water-cooled plates according to claim 5, characterized in that: The mounting groove (21) is located at the center of the first annular groove (23) and the second annular groove (27); Multiple sets of heat dissipation grooves (26) are provided on the connecting pipe (25), and the heat dissipation grooves (26) are arranged in the direction of the mounting through groove (21).

7. A self-cleaning friction stir welding cutter for water-cooled plates according to claim 5, characterized in that: The mounting sleeve (20) has multiple sets of air inlets (24), which are arranged in a ring array around the axis of the mounting sleeve (20). The air inlets (24) are connected to the inner cavity of the first annular groove (23).

8. A self-cleaning friction stir welding cutter for water-cooled plates according to claim 7, characterized in that: The air intake assembly (10) includes a movable sleeve (13), which is rotatably sealed on the outer wall of the mounting sleeve (20), and an air intake pipe (11) is provided on the movable sleeve (13). An air intake cavity (12) is provided between the movable sleeve (13) and the mounting sleeve (20), and the air intake cavity (12) is connected to the air intake hole (24).

9. A self-cleaning friction stir welding cutter for water-cooled plates according to claim 1, characterized in that: The mounting sleeve (20) is provided with a shoulder (60); The mounting sleeve (20) is also provided with a cleaning ring groove (29), and the cleaning pipe (28) is set in the cleaning ring groove (29). The cleaning ring groove (29) is coaxially set with the shoulder (60).

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