A high efficiency stir head device for copper-aluminum alloy dissimilar alloy welding

Abstract

The utility model discloses a kind of high-efficiency stirring head devices for copper-aluminum alloy dissimilar alloy welding, belong to welding stirring tool technical field, including rotary friction tool, shaft sleeve and stirring needle, machine tool is driven handle rotation, in turn drive rotary friction tool high-speed rotation.And the end of rotary friction tool is provided with shaft shoulder, the center of shaft shoulder inserts stirring needle, stirring needle is coaxial transmission connection with rotary friction tool, to drive stirring needle rotation by rotary friction tool, and the end of shaft sleeve is provided with compact smoothening mouth, in welding process, the compact smoothening mouth of shaft sleeve can be flattened and compacted to plasticized metal material, and ensure that metal material surface is flat.And shaft sleeve side is provided with discharge port, and excess plastic mixed metal material is discharged from discharge port in welding process, simultaneously, airflow is outwardly radiated by convection tank, to inhibit rotary friction tool temperature rise, to relieve the effect of rotary friction tool and stirring needle heat deformation.

Description

Technical Field

[0001] This utility model relates to the technical field of welding stirring tools, specifically to a high-efficiency stirring head device for welding dissimilar copper-aluminum alloys. Background Technology

[0002] Copper-aluminum dissimilar alloy welding is a challenging technical task. Traditional welding methods, such as argon arc welding and laser welding, often result in weld fractures at the copper-aluminum joint due to uneven grain structure at the weld.

[0003] To overcome these problems, friction stir welding is often used in the welding of dissimilar metal materials. Among them, the stationary shoulder stirring head device is a key component in friction stir welding, and its design and performance directly affect the welding quality and welding efficiency. However, due to the high temperature and intense friction generated on the surface of the base material during friction welding, excess high-temperature mixed plasticized metal is formed. Since the high-temperature mixed plasticized metal cannot be effectively discharged from the stationary shoulder stirring head, metal accumulation and overheating of the friction head will occur, which will cause deformation of the stationary shoulder stirring head and affect the metal welding effect. Utility Model Content

[0004] Therefore, this utility model provides a high-efficiency stirring head device for welding dissimilar copper-aluminum alloys. By setting a discharge port on the bushing, it solves the problem in the prior art that the deformation of the stirring head affects the metal welding effect.

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

[0006] This utility model discloses a high-efficiency stirring head device for welding dissimilar copper-aluminum alloys, comprising:

[0007] A rotating friction device with a shoulder at the end;

[0008] The bushing has a pressing and smoothing opening at one end and a discharge port on the side. A pair of convection grooves are symmetrically arranged on both sides of the discharge port.

[0009] The stirring pin is conical in shape and has multiple machined facets. The end of the stirring pin is inserted into the center of the shoulder, and the stirring pin passes through the pressing and smoothing opening and is adapted to rotate within the bushing.

[0010] The stirring needle is coaxially connected to the rotating friction device, which is inserted into the bushing and communicates with the outside through the convection groove and the discharge port.

[0011] Furthermore, the multiple cut surfaces on the outside of the stirring needle are planar.

[0012] Furthermore, the rotary friction device is fixed to the tool holder, the tool holder comprising:

[0013] The tapered shank has a pull stud inside, which cooperates with the broaching mechanism of the machining center spindle to complete radial positioning and axial locking.

[0014] The flange is fixed coaxially with the tapered shank at its upper end and connected to the clamping mechanism at its lower end. The clamping mechanism has a locking hole on its side, and a fastener is provided in the locking hole to lock the rotating friction device in the clamping mechanism.

[0015] Furthermore, the shaft sleeve is fitted inside the adapter assembly, which includes an adapter sleeve, a hollow groove, a locking nut, and a threaded port. The tool holder is located inside the adapter sleeve, and the adapter sleeve has multiple hollow grooves on its exterior.

[0016] The locking and clamping mechanism is located inside the adapter sleeve. The bottom of the adapter sleeve is provided with a threaded opening. A bushing is installed inside the threaded opening. The outside of the threaded opening is threadedly connected to the locking nut. The locking nut and the bushing are pressed and fixed together.

[0017] Furthermore, the shoulder edge is provided with rounded corners.

[0018] Furthermore, the fit tolerance between the shoulder and the pressing and smoothing opening is less than 0.2mm.

[0019] Furthermore, the multiple cross-sections on the outside of the stirring needle are helical curved surfaces.

[0020] This utility model has the following advantages:

[0021] This utility model discloses a high-efficiency stirring head device for welding dissimilar copper-aluminum alloys. The device uses a conical stirring pin with a threaded design to weld dissimilar metals. The stirring pin generates heat through friction within the weld seam of the dissimilar materials, melting the metal and thoroughly mixing the grains. Excess ductile metal is discharged through the discharge port on the bushing. Simultaneously, airflow passes through a convection channel, reducing the temperature rise of the rotating friction fixture and stirring pin through air cooling. This alleviates the problem of thermal deformation of the friction head, reduces ductile metal accumulation, and reduces shoulder wear, thereby improving the welding effect of dissimilar metals. Attached Figure Description

[0022] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0023] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0024] Figure 1 A perspective view of a welding stirring head device provided by this utility model;

[0025] Figure 2 A three-dimensional view of the cross-section stirring needle provided for this utility model;

[0026] Figure 3 A three-dimensional view of the spiral-section stirring needle provided by this utility model;

[0027] Figure 4 A perspective view of the bushing provided for this utility model;

[0028] Figure 5 A perspective view of the knife handle provided for this utility model;

[0029] Figure 6 A perspective view of the adapter component provided by this utility model;

[0030] In the figure: 1 Rotary friction fixture; 2 Shoulder; 3 Bushing; 4 Convection groove; 5 Stirring needle; 6 Discharge port; 7 Pressing and smoothing port; 8 Knife handle; 81 Conical handle; 82 Flange; 83 Clamping mechanism; 84 Locking hole; 9 Adapter assembly; 91 Adapter sleeve; 92 Hollowed-out groove; 93 Locking nut; 94 Threaded opening. Detailed Implementation

[0031] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] Please refer to this as well. Figures 1-6 This utility model discloses a high-efficiency stirring head device for welding dissimilar copper-aluminum alloys. It can remove excess plastic mixed metal during the friction welding process, reduce wear, and dissipate heat through air cooling, effectively improving the durability of the stirring friction welding head. The technical solution of this utility model will be described below by means of specific embodiments.

[0033] In one specific embodiment disclosed in this utility model, such as Figure 1 The high-efficiency stirring head device for welding dissimilar copper-aluminum alloys includes a rotary friction device 1, a bushing 3, and a stirring pin 5. The rotary friction device 1 is cylindrical, with its end mounted on a tool holder 8. The tool holder 8 is rotated by a machine tool, which in turn drives the rotary friction device 1 to rotate at high speed. A shoulder 2 is provided at the end of the rotary friction device 1. The shoulder 2 is flat at the base of the stirring head to facilitate contact with the material surface, thereby assisting in heat generation and preventing the overflow of plastic material. Based on this structure, a stirring pin 5 is inserted at the center of the shoulder 2. The stirring pin 5 is coaxially connected to the rotary friction device 1, so that the rotary friction device 1 drives the stirring pin 5 to rotate. The stirring pin 5 is a cylindrical or conical protrusion that can be inserted into the material to be welded, responsible for frictional heat generation and material stirring.

[0034] In this embodiment, the stirring needle 5 rotates within the bushing 3, and the end of the bushing 3 is provided with a pressing and smoothing port 7. During the welding process, since the fit tolerance between the rotary friction device 1 and the pressing and smoothing port 7 is less than 0.2mm, the pressing and smoothing port 7 of the rotary friction device 1 and the shoulder 2 are tightly fitted. Through this fit, the pressing and smoothing port 7 of the bushing 3 can flatten and press the plasticized metal material and ensure that the surface of the metal material is flat. On the other hand, a discharge port 6 is provided on the side of the bushing 3, and a pair of convection grooves 4 are symmetrically arranged on both sides of the discharge port 6. The rotary friction device 1 is inserted into the bushing 3 and communicates with the outside through the convection grooves 4 and the discharge port 6. During the welding process, excess plastic mixed metal material is discharged from the discharge port 6, and the convection channel 4 can also discharge plastic material to the outside. At the same time, during the rotation of the rotary friction device 1, airflow will also pass through the convection channel 4 to form convection, thereby dissipating the heat accumulated on the rotary friction device 1 into the air and conducting heat outward through the bushing 3, thereby reducing the temperature of the rotary friction device 1 in the operating state, thus playing a role in alleviating the thermal deformation of the rotary friction device 1 and the stirring pin 5.

[0035] In this embodiment, as Figure 2 and Figure 3 The stirring pin 5 has a conical shape on the outside and multiple machined facets. It should be noted that the multiple facets on the outside of the stirring pin 5 are flat, which improves the mixing effect of copper and aluminum metal in the weld pool. Optionally, the multiple facets on the outside of the stirring pin 5 can also be spiral curved surfaces. During the rotation of the stirring pin 5, it is beneficial for the shaped metal material to enter the discharge port 6 through the spiral curved surface and be discharged outward.

[0036] In some embodiments, the shoulder 2 is provided with a rounded corner, thereby forming an arc structure on the shoulder 2 and increasing the pressure on the machine tool from the Z-axis direction, thereby generating better frictional heat on the metal material.

[0037] In one specific embodiment of this utility model, the rotary friction device 1 is fixed on the tool holder 8. The tool holder 8 includes a tapered shank 81, a flange 82, a clamping mechanism 83, and a locking hole 84. The tapered shank 81 has a pull stud inside, which cooperates with the tool puller mechanism of the machining center spindle to achieve radial positioning and axial locking, preventing the tool holder 8 from loosening. The tapered shank 81 is coaxially fixed to the upper end of the flange 82, and the lower end of the flange 82 is connected to the clamping mechanism 83. During tool changing in the machining center, the flange 82 can be clamped by a robotic arm to complete the tool change. The clamping mechanism 83 has a locking hole 84 on its side, and a fastener is installed in the locking hole 84 to lock the rotary friction device 1 inside the clamping mechanism 83.

[0038] In this embodiment, the bushing 3 is assembled inside the adapter assembly 9. The adapter assembly 9 includes an adapter sleeve 91, a hollowed-out groove 92, a locking nut 93, and a threaded opening 94. The tool holder 8 is located inside the adapter sleeve 91. The adapter sleeve 91 has multiple hollowed-out grooves 92 on its exterior to improve heat dissipation. The adapter sleeve 91 contains a locking and clamping mechanism 83. The bottom of the adapter sleeve 91 has a threaded opening 94, and the bushing 3 is installed inside the threaded opening 94. In use, the outside of the threaded opening 94 is threadedly connected to the locking nut 93, and the locking nut 93 is abutted and fixed to the bushing 3.

[0039] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A high-efficiency stirring head device for welding dissimilar copper-aluminum alloys, characterized in that, include: A rotating friction device (1) has a shoulder (2) at its end; The bushing (3) has a pressing and smoothing opening (7) at the end and a discharge port (6) on the side. A pair of convection grooves (4) are symmetrically arranged on both sides of the discharge port (6). The stirring needle (5) is conical in shape and has multiple machined facets. The end of the stirring needle (5) is inserted into the center of the shoulder (2), and the stirring needle (5) passes through the pressing and smoothing opening (7) and is adapted to rotate within the bushing (3). The stirring needle (5) is coaxially connected to the rotating friction device (1), and the rotating friction device (1) is inserted into the bushing (3) and communicates with the outside world through the convection groove (4) and the discharge port (6).

2. The high-efficiency stirring head device for welding dissimilar copper-aluminum alloys as described in claim 1, characterized in that, The stirring needle (5) has multiple planar surfaces on its exterior.

3. The high-efficiency stirring head device for welding dissimilar copper-aluminum alloys as described in claim 1, characterized in that, The rotary friction device (1) is fixed on the tool holder (8), the tool holder (8) comprising: The taper shank (81) has a pull stud inside, which cooperates with the broaching mechanism of the machining center spindle to complete radial positioning and axial locking; The flange (82) is fixed coaxially with the tapered shank (81) at its upper end and connected to the clamping mechanism (83) at its lower end. The clamping mechanism (83) has a locking hole (84) on its side. The locking hole (84) is provided with a fastener to lock the rotating friction device (1) in the clamping mechanism (83).

4. The high-efficiency stirring head device for welding dissimilar copper-aluminum alloys as described in claim 3, characterized in that, The bushing (3) is assembled inside the adapter assembly (9). The adapter assembly (9) includes an adapter sleeve (91), a hollow groove (92), a locking nut (93), and a threaded port (94). The tool holder (8) is located inside the adapter sleeve (91). The adapter sleeve (91) has multiple hollow grooves (92) on its outside. The locking clamping mechanism (83) is located inside the adapter sleeve (91). The bottom of the adapter sleeve (91) is provided with a threaded port (94). The bushing (3) is installed inside the threaded port (94). The outside of the threaded port (94) is threadedly connected to the locking nut (93). The locking nut (93) and the bushing (3) are pressed and fixed together.

5. The high-efficiency stirring head device for welding dissimilar copper-aluminum alloys as described in claim 1, characterized in that, The shoulder (2) has rounded corners at its edge.

6. The high-efficiency stirring head device for welding dissimilar copper-aluminum alloys as described in claim 1, characterized in that, The fit tolerance between the shoulder (2) and the pressing and smoothing opening (7) is less than 0.2 mm.

7. The high-efficiency stirring head device for welding dissimilar copper-aluminum alloys as described in claim 1, characterized in that, The stirring needle (5) has multiple helical surfaces on its exterior.

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