Wear-resistant shaft shoulder tool for friction stir additive manufacturing

Abstract

The invention provides a wear-resistant shaft shoulder tool for friction stir additive manufacturing, and relates to the technical field of additive manufacturing. The wear-resistant shaft shoulder tool for friction stir additive manufacturing comprises a clamping handle and a wear-resistant metal assembly, wherein a bar channel is formed in the clamping handle; the wear-resistant metal assembly is arranged on the end face of one end of the clamping handle, the wear resistance of the wear-resistant metal assembly is larger than that of the clamping handle, the wear-resistant metal assembly is detachably connected with the clamping handle, and the side, away from the clamping handle, of the wear-resistant metal assembly is provided with a wear-resistant plane. The wear-resistant metal component with higher wear resistance is arranged on the end face of one end of the clamping handle, so that in the additive manufacturing process, the wear-resistant metal component provides extrusion and stirring friction effects on a plastic material and bears main wear of the plastic material to a shaft shoulder tool, and the service life of the shaft shoulder tool is prolonged; due to the fact that only the abrasion-resistant metal assembly is made of abrasion-resistant materials with high price, the manufacturing cost of the shaft shoulder tool is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of additive manufacturing, and in particular to a wear-resistant shoulder tool for friction stir additive manufacturing. Background Art

[0002] Friction stir additive manufacturing is a new type of solid-phase additive manufacturing method. It uses rods as raw materials. Under the action of axial force, the rods generate heat by friction with the substrate and reach a thermoplastic flow state. As the spindle moves along the set path, the rods continue to plasticize and deposit on the substrate surface to form an additive manufacturing layer. The shoulder tool at the front end of the spindle head plays an important role in additive deposition molding. For conventional 2xxx, 6xxx, 7xxx and other commonly used aluminum alloys, the shoulder tool is made of hot working die steel such as H13, which can meet the wear resistance requirements of the shoulder tool during the friction stir additive manufacturing process of aluminum alloys.

[0003] For high-strength wear-resistant materials, such as Al-SiC composites, shoulder tools made of conventional materials will inevitably be worn because the tool wear resistance is lower than that of the additive material. On the one hand, the worn shoulder will affect the stability of the additive manufacturing process. On the other hand, the worn shoulder tool material will enter the additive manufacturing deposition layer, affecting the microstructure and mechanical properties of the additive manufacturing deposition layer.

[0004] Common wear-resistant materials such as polycrystalline cubic boron nitride, tungsten-rhenium alloy, tungsten-cobalt alloy, etc. are often used to prepare stirring head tools for stir friction welding. However, the preparation process of these wear-resistant materials is complicated and the production cost is high. The volume of the shoulder tool manufactured by stir friction additive manufacturing is several times that of the stirring head used in stir friction welding. The economic cost of using the above-mentioned wear-resistant materials to produce shoulder tools is too high. Summary of the invention

[0005] The present invention provides a wear-resistant shoulder tool for friction stir additive manufacturing, so as to solve the problem of high production cost of shoulder tools produced by wear-resistant materials in the prior art.

[0006] The present invention provides a wear-resistant shoulder tool for stir friction additive manufacturing, comprising: A clamping handle, wherein the interior of the clamping handle has a bar passage; A wear-resistant metal component is arranged on the end surface of one end of the clamping handle, the wear resistance of the wear-resistant metal component is greater than the wear resistance of the clamping handle, the wear-resistant metal component is detachably connected to the clamping handle, and the side of the wear-resistant metal component facing away from the clamping handle has a wear-resistant plane.

[0007] According to a wear-resistant shoulder tool for stir friction additive manufacturing provided by the present invention, a positioning groove is provided on the end face of one end of the clamping handle, the wear-resistant metal component is embedded in the positioning groove, and the thickness of the wear-resistant metal component is greater than the depth of the positioning groove, so that part of the wear-resistant metal component protrudes from the positioning groove.

[0008] According to a wear-resistant shoulder tool for stir friction additive manufacturing provided by the present invention, the wear-resistant metal component includes a plurality of wear-resistant alloy blocks, the plurality of wear-resistant alloy blocks are arranged in sequence along the circumferential direction to enclose an opening connected to the bar channel, and the plurality of wear-resistant alloy blocks are spliced ​​on the side away from the clamping handle to form the wear-resistant plane.

[0009] According to a wear-resistant shoulder tool for stir friction additive manufacturing provided by the present invention, the wear-resistant alloy block is provided with at least one wear-resistant alloy countersunk hole, a wear-resistant bolt is arranged in the wear-resistant alloy countersunk hole, and the bottom wall of the positioning groove is provided with a plurality of threaded holes corresponding one by one to the wear-resistant alloy countersunk holes, and the wear-resistant bolts are threadedly matched with the corresponding threaded holes.

[0010] According to a wear-resistant shoulder tool for stir friction additive manufacturing provided by the present invention, a first plane is provided on the side of the wear-resistant alloy block facing the opening, and a second plane is provided at one end of the wear-resistant alloy block; among two adjacent wear-resistant alloy blocks, the first plane of one wear-resistant alloy block abuts against the second plane of the other wear-resistant alloy block, and the second planes of multiple wear-resistant alloy blocks cooperate to form the opening.

[0011] According to a wear-resistant shoulder tool for friction stir additive manufacturing provided by the present invention, the cross-sectional area of ​​the bar channel is equal to the cross-sectional area of ​​the opening.

[0012] According to a wear-resistant shoulder tool for stir friction additive manufacturing provided by the present invention, a wear-resistant alloy locating key is provided on the side of the wear-resistant alloy block facing the clamping handle, and a plurality of locating key grooves are provided on the bottom wall of the locating groove, and the wear-resistant alloy locating keys are embedded in the locating key grooves one by one.

[0013] According to a wear-resistant shoulder tool for friction stir additive manufacturing provided by the present invention, the cross-sections of the wear-resistant alloy locating key and the locating keyway are both non-circular.

[0014] According to a wear-resistant shoulder tool for friction stir additive manufacturing provided by the present invention, the wear-resistant alloy countersunk hole passes through the wear-resistant alloy locating key, the locating keyway is connected to the threaded hole, and the locating keyway is coaxially arranged with the threaded hole.

[0015] According to a wear-resistant shoulder tool for friction stir additive manufacturing provided by the present invention, the outer peripheral surface of the clamping handle is provided with a flange, and the edge of the flange is provided with a positioning groove.

[0016] The wear-resistant shoulder tool for stir friction additive manufacturing provided by the present invention has a wear-resistant metal component with greater wear resistance arranged on the end face of one end of the clamping handle. During the additive manufacturing process, the wear-resistant metal component provides extrusion and stirring friction effects on the plastic material, thereby assuming the main wear of the plastic material on the shoulder tool and extending the service life of the shoulder tool. Since only the wear-resistant metal component uses a relatively expensive wear-resistant material, the manufacturing cost of the shoulder tool is effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the wear-resistant shoulder tool for stir friction additive manufacturing provided by the present invention.

[0019] Figure 2 It is a schematic diagram of the side cross-sectional structure of the wear-resistant shoulder tool for stir friction additive manufacturing provided by the present invention.

[0020] Figure 3 It is a structural schematic diagram of the clamping handle provided by the present invention.

[0021] Figure 4 It is a structural schematic diagram of the wear-resistant alloy block provided by the present invention.

[0022] Reference numerals: 1. Bar channel; 2. Wear-resistant alloy block; 3. Wear-resistant bolt; 4. Flange; 5. Positioning groove; 6. Wear-resistant alloy countersunk hole; 7. Clamping handle; 8. Positioning keyway; 9. Threaded hole; 10. Wear-resistant alloy positioning key; 11. Positioning groove. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0026] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0028] Combine the following Figure 1-Figure 4 The specific structure of the wear-resistant shoulder tool for friction stir additive manufacturing of the present invention is described.

[0029] like Figure 1 As shown, the wear-resistant shoulder tool used for stir friction additive manufacturing includes a clamping handle 7 and a wear-resistant metal component. The clamping handle 7 has a rod channel 1 inside. The wear-resistant metal component is arranged on the end face of one end of the clamping handle 7. The wear resistance of the wear-resistant metal component is greater than that of the clamping handle 7. The wear-resistant metal component is detachably connected to the clamping handle 7, and the side of the wear-resistant metal component facing away from the clamping handle 7 has a wear-resistant plane.

[0030] The wear-resistant shoulder tool for stir friction additive manufacturing provided by the present invention has a wear-resistant metal component with greater wear resistance set on the end face of one end of the clamping handle 7. During the additive manufacturing process, the wear-resistant metal component provides extrusion and stirring friction effects on the plastic material, thereby assuming the main wear of the plastic material on the shoulder tool and extending the service life of the shoulder tool. Since only the wear-resistant metal component uses a relatively expensive wear-resistant material, the manufacturing cost of the shoulder tool is effectively reduced.

[0031] In one embodiment of the present invention, the wear-resistant plane is used to provide extrusion and stirring friction to the plastic material during the additive manufacturing process. The wear-resistant plane is circular. Of course, the shape of the wear-resistant plane is not limited thereto and is determined based on actual production needs.

[0032] In one embodiment of the present invention, the bar channel 1 serves as a conveying channel for the bar. During the additive manufacturing process, the bar is continuously fed out by the bar channel 1 and plasticized after friction with the substrate to generate heat. The bar channel 1 is arranged along the length direction of the clamping handle 7. The bar channel 1 passes through the clamping handle 7 and has ports formed at both ends of the clamping handle 7. The central axis of the bar channel 1 is in the same straight line as the central axis of the clamping handle 7, that is, the bar channel 1 is coaxially arranged with the clamping handle 7. In this embodiment, the cross-section of the bar channel 1 is rectangular. Of course, the cross-sectional shape of the bar channel 1 is not limited thereto and may also be other shapes, which are determined according to actual needs.

[0033] In a preferred embodiment of the present invention, the roughness of the inner surface of the bar channel 1 should be less than 0.2, and the bar channel 1 is polished by fluid polishing when machining the shoulder tool to reduce the friction resistance during feeding.

[0034] In one embodiment of the present invention, the clamping handle 7 is cylindrical, and the matching accuracy level between the clamping handle 7 and the main shaft is h6 to ensure reliable and stable installation of the shaft shoulder.

[0035] In one embodiment of the present invention, a positioning groove 5 is provided on the end surface of one end of the clamping handle 7. The positioning groove 5 is used to install the wear-resistant metal component and plays a positioning role on the wear-resistant metal component. The positioning groove 5 not only provides an installation position for the wear-resistant metal component, but also plays a positioning role on the wear-resistant metal component to prevent the wear-resistant metal component from moving. The positioning groove 5 is a circular groove body. Of course, the shape of the positioning groove 5 is not limited to this, and is specifically determined according to the shape of the wear-resistant metal component.

[0036] In a preferred embodiment of the present invention, an outer conical surface is provided on the outer circumference of one end of the clamping handle 7. The outer conical surface is provided on the outer circumference of one end of the clamping handle 7, which increases the surface area of ​​the clamping handle 7 while reducing the volume of the clamping handle 7, thereby improving the heat conduction and heat dissipation capacity of the clamping handle 7 itself, and is beneficial to the heat management of the stir friction additive process.

[0037] In one embodiment of the present invention, the wear-resistant metal component is embedded in the positioning groove 5, and the thickness of the wear-resistant metal component is greater than the depth of the positioning groove 5, so that part of the wear-resistant metal component protrudes from the positioning groove 5. Specifically, the height of the wear-resistant metal component protruding from the positioning groove 5 is 0.8 times the depth of the positioning groove 5. By making part of the wear-resistant metal component protrude from the positioning groove 5, during the additive manufacturing process, the wear-resistant plane provides extrusion and stirring friction to the plastic material, and the clamping handle 7 will not be worn, further extending the service life of the shoulder tool.

[0038] It should be noted that the thickness of the wear-resistant metal component refers to the dimension along the length direction of the clamping handle 7, that is, Figure 2 The size in the up-down direction.

[0039] In one embodiment of the present invention, the wear-resistant metal component includes a plurality of wear-resistant alloy blocks 2, which are arranged in sequence along the circumferential direction to enclose an opening connected to the rod channel 1, and the plurality of wear-resistant alloy blocks 2 are spliced ​​to form a circular plate body, and the thicknesses of the plurality of wear-resistant alloy blocks 2 are equal. The plurality of wear-resistant alloy blocks 2 are spliced ​​on the side away from the clamping handle 7 to form a wear-resistant plane, and the opening is located at the center of the wear-resistant plane.

[0040] In one embodiment of the present invention, the wear-resistant metal component includes four wear-resistant alloy blocks 2, each of which has the same shape and size. With such a setting, when installing the wear-resistant alloy block 2, there is no need to consider the installation position of each wear-resistant alloy block 2, which effectively simplifies the installation method of the wear-resistant shoulder tool, shortens the installation time, and improves the installation efficiency. Of course, the number of wear-resistant alloy blocks 2 is not limited to this, and five, six or more blocks can also be set, which is determined according to actual needs. The material of the wear-resistant alloy block 2 can be polycrystalline cubic boron nitride, tungsten-rhenium alloy or tungsten-cobalt alloy. Of course, the material of the wear-resistant alloy block 2 is not limited to this, and it is determined according to actual needs.

[0041] In one embodiment of the present invention, the wear-resistant alloy block 2 is provided with at least one wear-resistant alloy countersunk hole 6, which penetrates the wear-resistant alloy block 2, is a circular hole, and is provided with a wear-resistant bolt 3, and the nut of the wear-resistant bolt 3 is located in the wear-resistant alloy countersunk hole 6 to prevent the wear-resistant bolt 3 from being worn during use. The bottom wall of the positioning groove 5 is provided with a plurality of threaded holes 9 corresponding to the wear-resistant alloy countersunk holes 6 one by one, the threaded holes 9 are coaxially arranged with the wear-resistant alloy countersunk holes 6, and the wear-resistant bolts 3 are threadedly matched with the corresponding threaded holes 9.

[0042] In one embodiment of the present invention, a first plane is provided on the side of the wear-resistant alloy block 2 facing the opening, and a second plane is provided at one end of the wear-resistant alloy block 2. Among two adjacent wear-resistant alloy blocks 2, the first plane of one wear-resistant alloy block 2 abuts against the second plane of the other wear-resistant alloy block 2, and the second planes of multiple wear-resistant alloy blocks 2 cooperate to form an opening. In this embodiment, four wear-resistant alloy blocks 2 are provided, and the first planes of two adjacent wear-resistant alloy blocks 2 are perpendicular, thereby forming a rectangular opening.

[0043] Preferably, a cambered surface is provided on one side of the wear-resistant alloy block 2 facing the inner wall of the positioning groove 5, and the cambered surface is similar to the cambered surface of the inner wall of the positioning groove 5. The cambered surface of the wear-resistant alloy block 2 abuts against the inner wall of the positioning groove 5, and the wear-resistant alloy block 2 is limited by the inner wall of the positioning groove 5 to prevent the wear-resistant bolts 3 of the wear-resistant alloy block 2 from loosening. Since the first plane of one wear-resistant alloy block 2 abuts against the second plane of the other wear-resistant alloy block 2 in two adjacent wear-resistant alloy blocks 2, when one of the wear-resistant alloy blocks 2 is subjected to external force, the other wear-resistant alloy block 2 abuts against the wear-resistant alloy block 2 and the side wall of the positioning groove 5, so that the wear-resistant alloy block 2 is limited from two directions to prevent the wear-resistant alloy block 2 from loosening.

[0044] In one embodiment of the present invention, the cross-sectional area of ​​the bar material channel 1 is equal to the cross-sectional area of ​​the opening. In this embodiment, the cross-sectional area of ​​the bar material channel 1 and the cross-sectional area of ​​the opening are both rectangular, and the cross-sectional width and length of the bar material channel 1 are equal to the cross-sectional length and width of the opening. In this way, no step is formed at the connection between the bar material channel 1 and the opening, reducing the friction resistance during feeding.

[0045] In one embodiment of the present invention, a wear-resistant alloy positioning key 10 is provided on the side of the wear-resistant alloy block 2 facing the clamping handle 7. The wear-resistant alloy positioning key 10 is integrally formed with the wear-resistant alloy block 2, and of course, a connection method of welding or interference fit can also be adopted. The bottom wall of the positioning groove 5 is provided with a plurality of positioning key slots 8, and the wear-resistant alloy positioning keys 10 are embedded in the positioning key slots 8 one by one. By embedding the wear-resistant alloy positioning keys 10 in the corresponding positioning key slots 8, the wear-resistant alloy positioning keys 10 cooperate with the positioning key slots 8 to position the wear-resistant alloy block 2, and then cooperate with the fixing effect of the wear-resistant bolts 3, effectively improving the stability of the wear-resistant alloy block 2 and preventing the wear-resistant alloy block 2 from loosening during use.

[0046] In one embodiment of the present invention, the cross-sections of the wear-resistant alloy positioning key 10 and the positioning key slot 8 are both non-circular. After the wear-resistant alloy positioning key 10 is embedded in the positioning key slot 8, since the cross-sections of the wear-resistant alloy positioning key 10 and the positioning key slot 8 are both non-circular, the wear-resistant alloy block 2 can be limited to prevent the wear-resistant alloy block 2 from rotating around the axis of the wear-resistant bolt 3, thereby further improving the stability of the wear-resistant alloy block 2.

[0047] Specifically, in this embodiment, the thickness of the wear-resistant alloy positioning key 10 is equal to the depth of the positioning key slot 8, the cross-section of the wear-resistant alloy positioning key 10 is elliptical, and the cross-section of the positioning key slot 8 is elliptical. Of course, the cross-sectional shape of the wear-resistant alloy positioning key 10 and the positioning key slot 8 is not limited to elliptical, but can also be triangular, rectangular or other shapes.

[0048] In one embodiment of the present invention, the wear-resistant alloy countersunk hole 6 passes through the wear-resistant alloy positioning key 10, and the wear-resistant alloy countersunk hole 6 and the wear-resistant alloy positioning key 10 are coaxially arranged. Of course, the wear-resistant alloy countersunk hole 6 and the wear-resistant alloy positioning key 10 can also be non-coaxially arranged.

[0049] The positioning keyway 8 is connected to the threaded hole 9, and the positioning keyway 8 and the threaded hole 9 are coaxially arranged. Such an arrangement has the following three effects: First, the area occupied by the wear-resistant alloy countersunk hole 6 and the threaded hole 9 is reduced. Since the size of the positioning groove 5 is small, the positioning keyway 8 is connected to the threaded hole 9, and the positioning keyway 8 and the threaded hole 9 are coaxially arranged, which can reduce the total area occupied by the wear-resistant alloy countersunk hole 6 and the threaded hole 9, and can adapt to smaller positioning grooves 5. Second, the processing amount during the hole opening is reduced. Since the threaded hole 9 is located in the positioning keyway 8, the threaded hole 9 is opened in the positioning keyway 8, and the threaded hole 9 can be set shorter, reducing the processing amount. Third, it is convenient to assemble the wear-resistant alloy block 2. After the wear-resistant alloy positioning key 10 is embedded in the positioning keyway 8, since the positioning keyway 8 and the threaded hole 9 are coaxially arranged, the wear-resistant alloy countersunk hole 6 will be automatically aligned with the threaded hole 9, and there is no need to align the wear-resistant alloy countersunk hole 6 with the threaded hole 9 separately, which simplifies the assembly method and improves the assembly efficiency.

[0050] In one embodiment of the present invention, a flange 4 is provided on the outer circumferential surface of the clamping handle 7. The flange 4 is used to connect with the main shaft. The flange 4 is provided with a plurality of bolt holes. The plurality of bolt holes are arranged at intervals along the circumferential direction. The flange 4 is connected with the main shaft by bolts. A positioning block is provided on the main shaft. A positioning groove 5 is provided on the edge of the flange 4. The positioning block and the positioning groove 5 are positioned and matched to ensure that the bar material channel 1 of the main shaft is completely aligned with the bar material channel 1 of the clamping handle 7, which simplifies the assembly method of the wear-resistant shoulder tool and further improves the assembly efficiency.

[0051] Combine the following Figures 1 to 4 A specific embodiment of the present invention is described as follows. Figures 1 to 4 As shown, the wear-resistant shoulder tool used for stir friction additive manufacturing includes a clamping handle 7 and a wear-resistant metal component. The clamping handle 7 has a rod channel 1 inside. The wear-resistant metal component is arranged on the end face of one end of the clamping handle 7. The wear resistance of the wear-resistant metal component is greater than that of the clamping handle 7. The side of the wear-resistant metal component facing away from the clamping handle 7 has a wear-resistant plane.

[0052] The clamping handle 7 is cylindrical, and the matching accuracy grade between the clamping handle 7 and the main shaft is h6. The end surface of one end of the clamping handle 7 is provided with a positioning groove 5, and the positioning groove 5 is a circular groove body. The outer peripheral surface of one end of the clamping handle 7 is provided with an outer cone surface, and the outer cone surface is arranged in a ring shape.

[0053] The bar channel 1 is arranged along the length direction of the clamping handle 7. The bar channel 1 passes through the clamping handle 7 and has ports formed at both ends of the clamping handle 7. The bar channel 1 is coaxially arranged with the clamping handle 7. The cross-section of the bar channel 1 is rectangular, and the roughness of the inner surface of the bar channel 1 is less than 0.2.

[0054] The wear-resistant metal component is embedded in the positioning groove 5, and the thickness of the wear-resistant metal component is greater than the depth of the positioning groove 5, so that part of the wear-resistant metal component protrudes from the positioning groove 5. The wear-resistant metal component includes four wear-resistant alloy blocks 2, which are arranged in sequence along the circumferential direction to enclose an opening connected to the bar channel 1. The four wear-resistant alloy blocks 2 are spliced ​​to form a circular plate body, and the thickness of the four wear-resistant alloy blocks 2 is equal. The four wear-resistant alloy blocks 2 are spliced ​​on the side away from the clamping handle 7 to form a wear-resistant plane, and the opening is located at the center of the wear-resistant plane. A first plane is provided on the side of the wear-resistant alloy block 2 facing the opening, and a second plane is provided at one end of the wear-resistant alloy block 2. A curved surface is provided on the side of the wear-resistant alloy block 2 facing the inner wall of the positioning groove 5, and the curvature of the curved surface is similar to the curvature of the inner wall of the positioning groove 5, and the curved surface of the wear-resistant alloy block 2 abuts against the inner wall of the positioning groove 5. Among two adjacent wear-resistant alloy blocks 2, the first plane of one wear-resistant alloy block 2 abuts against the second plane of the other wear-resistant alloy block 2, and the second planes of the four wear-resistant alloy blocks 2 cooperate to form a rectangular opening. The cross section of the bar material channel 1 and the cross section of the opening are both rectangular, and the cross section width and length of the bar material channel 1 are equal to the length and width of the cross section of the opening.

[0055] The wear-resistant alloy block 2 is provided with a wear-resistant alloy countersunk hole 6, which passes through the wear-resistant alloy block 2. The wear-resistant alloy countersunk hole 6 is a circular hole. A wear-resistant bolt 3 is arranged in the wear-resistant alloy countersunk hole 6. The nut of the wear-resistant bolt 3 is located in the wear-resistant alloy countersunk hole 6. The bottom wall of the positioning groove 5 is provided with four threaded holes 9 corresponding to the wear-resistant alloy countersunk holes 6 one by one. The threaded hole 9 is coaxially arranged with the wear-resistant alloy countersunk hole 6, and the wear-resistant bolt 3 is threadedly matched with the corresponding threaded hole 9.

[0056] A wear-resistant alloy positioning key 10 is provided on the side of the wear-resistant alloy block 2 facing the clamping handle 7. The wear-resistant alloy positioning key 10 is integrally formed with the wear-resistant alloy block 2. The bottom wall of the positioning groove 5 is provided with four positioning key slots 8. The wear-resistant alloy positioning keys 10 are embedded in the positioning key slots 8 one by one. The thickness of the wear-resistant alloy positioning key 10 is equal to the depth of the positioning key slot 8. The cross-section of the wear-resistant alloy positioning key 10 is elliptical, and the cross-section of the positioning key slot 8 is elliptical. The wear-resistant alloy countersunk hole 6 passes through the wear-resistant alloy positioning key 10, and the wear-resistant alloy countersunk hole 6 is coaxially arranged with the wear-resistant alloy positioning key 10. The positioning key slot 8 is connected with the threaded hole 9, and the positioning key slot 8 is coaxially arranged with the threaded hole 9.

[0057] The outer circumferential surface of the clamping handle 7 is provided with a flange 4, which is used to connect with the main shaft, and is provided with eight bolt holes, which are arranged at intervals along the circumferential direction, and the flange 4 and the main shaft are connected together by bolts. A positioning block is provided on the main shaft, and a positioning groove 11 is provided on the edge of the flange 4, and the positioning block is positioned and matched with the positioning groove 11.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wear-resistant shoulder tool for friction stir additive manufacturing, characterized in that: include: A clamping handle (7), wherein the interior of the clamping handle (7) is provided with a bar passage (1); A wear-resistant metal component, wherein the wear-resistant metal component is arranged on an end surface of one end of the clamping handle (7), the wear resistance of the wear-resistant metal component is greater than the wear resistance of the clamping handle (7), the wear-resistant metal component is detachably connected to the clamping handle (7), and the side of the wear-resistant metal component facing away from the clamping handle (7) has a wear-resistant plane.

2. The wear-resistant shoulder tool for friction stir additive manufacturing according to claim 1, characterized in that: A positioning groove (5) is provided on the end surface of one end of the clamping handle (7), the wear-resistant metal component is embedded in the positioning groove (5), and the thickness of the wear-resistant metal component is greater than the depth of the positioning groove (5), so that part of the wear-resistant metal component protrudes from the positioning groove (5).

3. The wear-resistant shoulder tool for friction stir additive manufacturing according to claim 1, characterized in that: The wear-resistant metal component comprises a plurality of wear-resistant alloy blocks (2), wherein the plurality of wear-resistant alloy blocks (2) are arranged in sequence along the circumferential direction to enclose an opening connected to the bar material channel (1), and the plurality of wear-resistant alloy blocks (2) are spliced ​​on a side away from the clamping handle (7) to form the wear-resistant plane.

4. The wear-resistant shoulder tool for friction stir additive manufacturing according to claim 3, characterized in that: The wear-resistant alloy block (2) is provided with at least one wear-resistant alloy countersunk hole (6), a wear-resistant bolt (3) is arranged in the wear-resistant alloy countersunk hole (6), the bottom wall of the positioning groove (5) is provided with a plurality of threaded holes (9) corresponding one-to-one to the wear-resistant alloy countersunk holes (6), and the wear-resistant bolts (3) are threadedly matched with the corresponding threaded holes (9).

5. The wear-resistant shoulder tool for friction stir additive manufacturing according to claim 4, characterized in that: The wear-resistant alloy block (2) is provided with a first plane on one side facing the opening, and a second plane is provided at one end of the wear-resistant alloy block (2); among two adjacent wear-resistant alloy blocks (2), the first plane of one wear-resistant alloy block (2) abuts against the second plane of the other wear-resistant alloy block (2), and the second planes of a plurality of wear-resistant alloy blocks (2) cooperate to enclose the opening.

6. The wear-resistant shoulder tool for friction stir additive manufacturing according to claim 5, characterized in that: The cross-sectional area of ​​the bar material channel (1) is equal to the cross-sectional area of ​​the opening.

7. The wear-resistant shoulder tool for friction stir additive manufacturing according to claim 5, characterized in that: A wear-resistant alloy positioning key (10) is provided on one side of the wear-resistant alloy block (2) facing the clamping handle (7), and a plurality of positioning key slots (8) are provided on the bottom wall of the positioning groove (5), and the wear-resistant alloy positioning keys (10) are embedded in the positioning key slots (8) in a one-to-one correspondence.

8. The wear-resistant shoulder tool for friction stir additive manufacturing according to claim 7, characterized in that: The cross-sections of the wear-resistant alloy positioning key (10) and the positioning key slot (8) are both non-circular.

9. The wear-resistant shoulder tool for friction stir additive manufacturing according to claim 7, characterized in that: The wear-resistant alloy countersunk hole (6) passes through the wear-resistant alloy positioning key (10), the positioning key slot (8) is connected to the threaded hole (9), and the positioning key slot (8) and the threaded hole (9) are coaxially arranged.

10. The wear-resistant shoulder tool for friction stir additive manufacturing according to any one of claims 1 to 9, characterized in that: The outer peripheral surface of the clamping handle (7) is provided with a flange (4), and the edge of the flange (4) is provided with a positioning groove (11).

Images