Friction stir additive device and equipment

Abstract

The utility model relates to a stirring friction material adding device and equipment. The stirring friction material adding device comprises a cutter handle and a stirring friction material adding device, the stirring head is detachably connected with the cutter handle; the cutter handle and the stirring head are coaxially connected; the plurality of milling blades are arranged at the bottom of the stirring head; the milling cutter blade extends out of a stirring head in the direction away from the cutter handle; the plurality of stirring needles are arranged on the shaft shoulder of the stirring head; the multiple stirring needles are distributed in the circumferential direction of a shaft shoulder of the stirring head. Wherein a first channel is formed in the cutter handle in the axial direction, a second channel is formed in the stirring head in the axial direction, and the first channel and the second channel are communicated to form a material channel. According to the utility model, the additive forming process can be improved, the problem that the discharge port is blocked by the flash of excess material extrusion during widening is avoided, and meanwhile, the forming efficiency is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of additive manufacturing, in particular to a friction stir additive device and equipment. Background Art

[0002] Additive manufacturing is a revolutionary rapid prototyping technology that uses a discrete-accumulation method to discretize the digital model and then continuously stack the materials to form the required solid model. Friction stir additive manufacturing is based on friction stir welding technology. The material generates heat through friction, so that the material reaches a semi-solid state. The stirring head stirs and disperses the material to achieve accumulation and forming. This technology has the advantages of low additive temperature and high speed, and can achieve efficient and high-quality manufacturing of large structural parts such as rocket connecting rings and aircraft wing trusses. In this technology, the stirring head plays a key role in material forming and performance. In order to meet process requirements, the existing stirring head has added features such as cooling and stirring needles to adjust the temperature of the additive material at the front end of the stirring head, and to fully stir the additive layer to improve the effect between the additive layers.

[0003] At present, for additive components with a wide width and large size, a single-channel process can no longer meet the forming requirements, and a widening process is required, that is, a process method in which multiple additive channels are connected to form a wide channel. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model discloses a friction stir material adding device and equipment.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] In a first aspect, a friction stir additive device is provided, comprising:

[0007] knife handle;

[0008] A stirring head is detachably connected to the knife handle; and the knife handle and the stirring head are coaxially connected;

[0009] A plurality of milling blades are provided on the bottom side of the mixing head; and the milling blades extend out of the mixing head in a direction away from the tool handle;

[0010] A plurality of stirring pins are provided on the shoulder of the stirring head; and the plurality of stirring pins are distributed circumferentially along the shoulder of the stirring head;

[0011] The tool handle is provided with a first channel along its axial direction, and the stirring head is provided with a second channel along its axial direction. The first channel and the second channel are connected to form a material channel.

[0012] In one embodiment of the present invention, the knife handle and the stirring head are threadedly connected.

[0013] In one embodiment of the present utility model, the inner wall of the tool handle is provided with multiple circles of first threads; the stirring head includes a first body and a second body; the diameter of the first body is smaller than the diameter of the second body; the outer wall of the first body is provided with multiple circles of second threads, the first body extends into the tool handle, and the first threads and the second threads engage with each other.

[0014] In one embodiment of the present invention, the first body defines a first-level channel, the second body defines a second-level channel, and the first-level channel and the second-level channel are communicated.

[0015] In one embodiment of the present invention, the diameter of the second-stage channel close to the first-stage channel is smaller than the diameter of the second-stage channel away from the first-stage channel.

[0016] In one embodiment of the present invention, the taper of the second-stage channel away from the aperture of the first-stage channel is 0°-2°.

[0017] In one embodiment of the present invention, the first body defines a first sealing groove; the second body defines a second sealing groove; and both the first sealing groove and the second sealing groove are filled with sealing rings.

[0018] In one embodiment of the present invention, the plurality of milling blades are evenly distributed along the circumference of the mixing head.

[0019] In one embodiment of the present invention, the knife handle is provided with a water inlet channel and a water outlet channel along its axial direction, a water trough is provided between the knife handle and the stirring head, and the water inlet channel, the water trough and the water outlet channel are connected.

[0020] In a second aspect, a friction stir additive device is provided, comprising:

[0021] Drive device;

[0022] The friction stir additive device provided in the first aspect is connected to the driving end of the driving device.

[0023] The above technical solution of the utility model has the following advantages compared with the prior art:

[0024] The self-milling function in the friction stir additive device of the present invention can improve the additive molding process, avoid the problem of excess material being squeezed out and flash clogging the discharge port during widening, and also improve the molding efficiency.

[0025] The arrangement of the stirring needle and the additive track in the friction stir additive device described in the utility model can improve the mechanical properties of the widened layer.

[0026] The friction stir additive device described in the present invention can control the additive molding width by changing the track spacing and the feeding ratio, and better achieve a gradual change in layer width when multiple channels are stacked, thereby improving the additive efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0028] Figure 1 It is a structural schematic diagram of the friction stir additive device in the present invention from a first perspective.

[0029] Figure 2 It is a structural schematic diagram of the friction stir additive device in the present invention from a second perspective.

[0030] Figure 3 It is a structural schematic diagram of the stirring head in the utility model from the first perspective.

[0031] Figure 4 It is a structural schematic diagram of the stirring head in the utility model from a second viewing angle.

[0032] Figure 5 It is a top view of the friction stir additive device in the present invention.

[0033] Figure 6 yes Figure 5 Cross-section view at AA in the middle.

[0034] Figure 7 This is a motion trajectory diagram of the friction stir additive device in the present invention.

[0035] Figure 8 It is a working schematic diagram of the friction stir additive device in the present invention.

[0036] Explanation of the figure marks in the specification: 10. Tool handle; 11. First channel; 12. Water inlet channel; 13. Water outlet channel; 14. Water tank; 20. Stirring head; 21. First body; 22. Second body; 23. Mounting hole; 24. First-level channel; 25. Second-level channel; 31. First sealing groove; 32. Second sealing groove; 40. Milling blade; 50. Stirring needle. DETAILED DESCRIPTION

[0037] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0038] The aforementioned and other technical aspects, features, and functions of the present invention will be more clearly demonstrated in the following detailed description of the embodiments with reference to the accompanying drawings. Directional terms such as up, down, left, right, front, and back, used in the following embodiments, are merely references to the accompanying drawings. Therefore, the directional terms used are for illustrative purposes only and are not intended to limit the present invention. Furthermore, throughout the embodiments, identical reference numerals denote identical components. Example 1

[0039] Combine Figures 1 to 6 A friction stir additive device includes a tool holder 10, a stirring head 20, a plurality of milling blades 40 and a plurality of stirring pins 50.

[0040] The stirring head 20 and the knife handle 10 are detachably connected; and the knife handle 10 and the stirring head 20 are coaxially connected;

[0041] A plurality of milling blades 40 are provided on the bottom side of the mixing head 20; and the milling blades 40 extend out of the mixing head 20 in a direction away from the tool handle 10;

[0042] A plurality of stirring pins 50 are provided on the shoulder of the stirring head 20; and the plurality of stirring pins 50 are distributed circumferentially along the shoulder of the stirring head 20;

[0043] The tool handle 10 defines a first channel 11 along its axial direction, and the stirring head 20 defines a second channel along its axial direction. The first channel 11 and the second channel are connected to form a material channel.

[0044] This embodiment provides a friction stir additive device. By providing a milling blade 40 and adding a self-milling function, the additive molding process can be improved, and the problem of excess material being squeezed out and burrs clogging the discharge port during widening can be avoided, while also improving the molding efficiency.

[0045] In this embodiment, the tool handle 10 and the mixing head 20 are threadedly connected. Specifically, the inner wall of the tool handle 10 is provided with multiple turns of a first thread; the mixing head 20 includes a first body 21 and a second body 22; the diameter of the first body 21 is smaller than the diameter of the second body 22; the outer wall of the first body 21 is provided with multiple turns of a second thread, and the first body 21 extends into the tool handle 10, with the first and second threads intermeshing.

[0046] It should be noted that the "detachable connection" can also be a pin connection, a snap connection, or a plug connection. The "detachable connection" allows the connection between the handle 10 and the stirring head 20 to be easily disassembled and reassembled when needed. It is understood that the stirring head 20 of different structures can be replaced according to process requirements.

[0047] In this embodiment, the first body 21 defines a first-level channel 24 , and the second body 22 defines a second-level channel 25 . The first-level channel 24 and the second-level channel 25 are in communication.

[0048] Furthermore, the diameter of the second-stage channel 25 close to the first-stage channel 24 is smaller than the diameter of the second-stage channel 25 away from the first-stage channel 24 .

[0049] The taper of the second-stage channel 25 away from the first-stage channel 24 is 0°-2°, which can make the discharge smoother and prevent blockage.

[0050] In this embodiment, the first body 21 defines a first sealing groove 31. The second body 22 defines a second sealing groove 32. Both the first sealing groove 31 and the second sealing groove 32 are filled with sealing rings, which fill the gap between the tool handle 10 and the stirring head 20. The sealing rings are used to prevent the coolant from overflowing, wherein the coolant can be cooling water. When the stirring head 20 generates high temperature during the welding process, the coolant passes through the water inlet channel 12, the water tank 14, and the water outlet channel 13 to reduce the temperature of the stirring head 20, while the sealing rings ensure that the coolant does not leak, thereby maintaining the stability and efficiency of the welding process.

[0051] In this embodiment, a plurality of milling blades 40 are evenly distributed along the circumference of the mixing head 20. Specifically, a mounting hole 23 is provided on the bottom side of the mixing head 20, and the milling blades 40 are fixed to the bottom side of the mixing head 20 through the mounting hole 23. Figure 2 As shown, four milling blades 40 are provided, with adjacent milling blades 40 forming a 90° angle. The milling blades 40 are arranged at an angle. The tilt direction of the milling blades 40 should be coordinated with the welding direction to ensure that the material can flow smoothly from the front to the rear of the stirring head 20 during the welding process, reducing the risk of material accumulation and defects.

[0052] In this embodiment, the tool handle 10 defines a water inlet channel 12 and a water outlet channel 13 along its axial direction. A water trough 14 is provided between the tool handle 10 and the stirring head 20, and the water inlet channel 12, the water trough 14, and the water outlet channel 13 are connected. Coolant can thus be passed through the water inlet channel 12 to the water trough 14 and discharged through the water outlet channel 13, ensuring that the stirring head 20 maintains a suitable operating temperature during the friction stir additive manufacturing process, preventing material overheating. Furthermore, the coolant helps reduce the temperature of the stirring head 20 and the welding area, thereby ensuring the performance and microstructure of the friction stir additive manufacturing process.

[0053] Combine Figure 7 and Figure 8 , the working principle of this embodiment is as follows:

[0054] The stirring head 20 is mounted at the lower end of the tool handle 10, and the material channel houses the additive consumables, namely the rod. Rotation of the tool handle 10 drives the rod and stirring head 20, generating heat and plasticization through friction between the rod and the substrate, forming a solid additive layer. The material is laid flat along the forming and leveling tracks, then along the widening track to create a widened layer. After the widening process is complete, the material is laid again along the raising track to reach the second layer. Example 2

[0055] This embodiment provides a friction stir additive device, comprising a driving device and the friction stir additive device as described in Example 1. The friction stir additive device is connected to a driving end of the driving device.

[0056] Those skilled in the art can configure a specific drive device according to actual needs, such as a robotic arm, a three-axis drive, etc., and the details will not be repeated here. The friction stir additive device described in this embodiment includes the friction stir additive device described in the above embodiment, so the beneficial effects thereof are also possessed by the friction stir additive device, and the details will not be repeated here.

[0057] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0058] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A friction stir additive device, characterized in that: include: Handle (10); The stirring head (20) is detachably connected to the knife handle (10); and the knife handle (10) and the stirring head (20) are coaxially connected; A plurality of milling blades (40) are provided on the bottom side of the stirring head (20); and the milling blades (40) extend out of the stirring head (20) in a direction away from the tool handle (10); A plurality of stirring needles (50) are provided on the shaft shoulder of the stirring head (20); and the plurality of stirring needles (50) are distributed circumferentially along the shaft shoulder of the stirring head (20); The tool handle (10) is provided with a first channel (11) along its axial direction, and the stirring head (20) is provided with a second channel along its axial direction, and the first channel (11) and the second channel are connected to form a material channel.

2. The friction stir additive device according to claim 1, characterized in that: The knife handle (10) and the stirring head (20) are threadedly connected.

3. The friction stir additive device according to claim 2, characterized in that: The inner wall of the tool handle (10) is provided with a plurality of turns of first threads; the stirring head (20) comprises a first main body (21) and a second main body (22); the diameter of the first main body (21) is smaller than the diameter of the second main body (22); the outer wall of the first main body (21) is provided with a plurality of turns of second threads, the first main body (21) extends into the tool handle (10), and the first threads and the second threads engage with each other.

4. The friction stir additive device according to claim 3, characterized in that: The first main body (21) defines a first-level channel (24), the second main body (22) defines a second-level channel (25), and the first-level channel (24) and the second-level channel (25) are in communication.

5. The friction stir additive device according to claim 4, characterized in that: The caliber of the second-stage channel (25) close to the first-stage channel (24) is smaller than the caliber of the second-stage channel (25) away from the first-stage channel (24).

6. The friction stir additive device according to claim 5, characterized in that: The taper of the second-stage channel (25) away from the first-stage channel (24) is 0°-2°.

7. The friction stir additive device according to claim 3, characterized in that: The first body (21) is provided with a first sealing groove (31); the second body (22) is provided with a second sealing groove (32); and both the first sealing groove (31) and the second sealing groove (32) are filled with sealing rings.

8. The friction stir additive device according to claim 1, characterized in that: The plurality of milling blades (40) are evenly distributed along the circumference of the stirring head (20).

9. The friction stir additive device according to claim 1, characterized in that: The knife handle (10) is provided with a water inlet channel (12) and a water outlet channel (13) along its axial direction. A water trough (14) is provided between the knife handle (10) and the stirring head (20). The water inlet channel (12), the water trough (14) and the water outlet channel (13) are in communication.

10. A friction stir additive device, characterized in that: include: Drive device; The friction stir additive device according to any one of claims 1 to 9, connected to the driving end of the driving device.

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