A wear-resistant shoulder tool for friction stir additive manufacturing

Abstract

The application provides a wear-resistant shoulder tool for friction stir additive manufacturing, and relates to the technical field of additive manufacturing. The wear-resistant shoulder tool for friction stir additive manufacturing comprises a clamping handle and a wear-resistant metal component. The inside of the clamping handle is provided with a bar channel. The wear-resistant metal component is arranged on the end face of one end of the clamping handle. The wear resistance of the wear-resistant metal component is greater than that of the clamping handle. The wear-resistant metal component is detachably connected with the clamping handle. The side, which is away from the clamping handle, of the wear-resistant metal component is provided with a wear-resistant plane. In the additive manufacturing process, the wear-resistant metal component provides extrusion and friction stirring effects on the plastic material, and bears the main wear of the plastic material on the shoulder tool, thereby prolonging the service life of the shoulder tool. Since only the wear-resistant metal component uses wear-resistant materials with high prices, the manufacturing cost of the shoulder tool is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of additive manufacturing technology, in particular to a wear-resistant shoulder tool for friction stir additive manufacturing. BACKGROUND

[0002] Friction stir additive manufacturing is a new type of solid-phase forming additive manufacturing method, which uses a rod as a raw material. The rod produces heat by friction with the substrate under the action of axial force, reaches a thermoplastic flow state, and continuously plasticizes and deposits on the substrate surface to form an additive manufacturing layer as the spindle moves along the set path. The shoulder tool at the front end of the spindle head plays an important role in additive deposition forming. For conventional 2xxx, 6xxx, 7xxx, etc. commonly used aluminum alloys, the shoulder tool is made of H13 hot work die steel, which can meet the requirements of the shoulder tool wear resistance during aluminum alloy friction stir additive manufacturing.

[0003] For high-strength wear-resistant materials such as Al-SiC composites, the shoulder tool made of conventional materials will inevitably be worn due to the lower wear resistance of the tool than the additive material. On the one hand, the worn shoulder will affect the stability of the additive manufacturing process, and 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 friction stir welding tools. However, the production process of these wear-resistant materials is complex, and the production cost is high. The volume of the shoulder tool for friction stir additive manufacturing is several times that of the friction stir welding tool. The economic cost of producing the shoulder tool from the above wear-resistant materials is too high. SUMMARY

[0005] The present application provides a wear-resistant shoulder tool for friction stir additive manufacturing to solve the problem of high production cost of wear-resistant materials for producing shoulder tools in the prior art.

[0006] The present application provides a wear-resistant shoulder tool for friction stir additive manufacturing, comprising:

[0007] a clamping handle, the inside of the clamping handle having a rod channel;

[0008] a wear-resistant metal component, the wear-resistant metal component being arranged on the end face of one end of the clamping handle, the wear resistance of the wear-resistant metal component being greater than that of the clamping handle, the wear-resistant metal component being detachably connected with the clamping handle, and the wear-resistant metal component having a wear-resistant flat surface on the side away from the clamping handle.

[0009] According to the application, a wear-resistant shoulder tool for friction stir additive manufacturing is provided, wherein an end face of one end of the clamping handle is provided with a positioning groove, and a 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 out of the positioning groove.

[0010] According to the application, a wear-resistant shoulder tool for friction stir additive manufacturing is provided, wherein the wear-resistant metal component comprises a plurality of wear-resistant alloy blocks, and the plurality of wear-resistant alloy blocks are sequentially arranged in a circumferential direction to enclose an opening in communication with the bar channel, and the plurality of wear-resistant alloy blocks are spliced on a side away from the clamping handle to form the wear-resistant plane.

[0011] According to the application, a wear-resistant shoulder tool for friction stir additive manufacturing is provided, wherein the wear-resistant alloy block is provided with at least one wear-resistant alloy countersunk hole, the wear-resistant alloy countersunk hole is provided with a wear-resistant bolt, the bottom wall of the positioning groove is provided with a plurality of threaded holes corresponding to the wear-resistant alloy countersunk holes one by one, and the wear-resistant bolt is threadedly matched with the corresponding threaded hole.

[0012] According to the application, a wear-resistant shoulder tool for friction stir additive manufacturing is provided, wherein the wear-resistant alloy block is provided with a first plane on a side facing the opening, and the wear-resistant alloy block is provided with a second plane on one end; in adjacent two 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 the plurality of wear-resistant alloy blocks cooperatively enclose the opening.

[0013] According to the application, a wear-resistant shoulder tool for friction stir additive manufacturing is provided, wherein the cross-sectional area of the bar channel is equal to the cross-sectional area of the opening.

[0014] According to the application, a wear-resistant shoulder tool for friction stir additive manufacturing is provided, wherein the wear-resistant alloy block is provided with a wear-resistant alloy positioning key on a side facing the clamping handle, and the bottom wall of the positioning groove is provided with a plurality of positioning key grooves, and the wear-resistant alloy positioning key is embedded in the positioning key groove one by one.

[0015] According to the application, a wear-resistant shoulder tool for friction stir additive manufacturing is provided, wherein the cross sections of the wear-resistant alloy positioning key and the positioning key groove are both non-circular.

[0016] According to the application, a wear-resistant shoulder tool for friction stir additive manufacturing is provided, wherein the wear-resistant alloy countersunk hole penetrates through the wear-resistant alloy positioning key, the positioning key groove is in communication with the threaded hole, and the positioning key groove and the threaded hole are coaxially arranged.

[0017] The application provides a wear-resistant shoulder tool for friction stir additive manufacturing, and a flange is arranged on the outer circumferential surface of the clamping handle, and an edge of the flange is provided with a positioning groove.

[0018] The application provides a wear-resistant shoulder tool for friction stir additive manufacturing, and a wear-resistant metal component with greater wear resistance is arranged on the end surface of one end of the clamping handle, so that the wear-resistant metal component provides extrusion and friction stirring to the plastic material during the additive manufacturing process, and mainly bears the wear of the plastic material to the shoulder tool, thereby prolonging the service life of the shoulder tool; since only the wear-resistant metal component uses wear-resistant materials with high prices, the manufacturing cost of the shoulder tool is effectively reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0020] Figure 1 FIG. 1 is a schematic diagram of the three-dimensional structure of the wear-resistant shoulder tool for friction stir additive manufacturing provided by the application.

[0021] Figure 2 FIG. 2 is a schematic diagram of the side view structure of the wear-resistant shoulder tool for friction stir additive manufacturing provided by the application.

[0022] Figure 3 FIG. 3 is a schematic diagram of the structure of the clamping handle provided by the application.

[0023] Figure 4 FIG. 4 is a schematic diagram of the structure of the wear-resistant alloy block provided by the application.

[0024] Reference signs:

[0025] 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 key groove; 9, threaded hole; 10, wear-resistant alloy positioning key; 11, positioning groove. DETAILED DESCRIPTION

[0026] In order to make the objects, technical solutions and advantages of the application clearer, the technical solutions in the application will be described clearly and completely below in combination with the drawings in the application. Obviously, the described embodiments are some embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the application.

[0027] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0028] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0029] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be 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 "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0030] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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 present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0031] The following will be described in conjunction with Figures 1-4The application discloses a specific structure of a wear-resistant shoulder tool for friction stir additive manufacturing.

[0032] As Figure 1 shown in the figure, the wear-resistant shoulder tool for friction stir additive manufacturing comprises a clamping handle 7 and a wear-resistant metal component, the inside of the clamping handle 7 is provided with a bar channel 1, 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 with the clamping handle 7, and the wear-resistant metal component is provided with a wear-resistant plane on the side away from the clamping handle 7.

[0033] The wear-resistant shoulder tool for friction stir additive manufacturing provided by the application has the advantages that the wear-resistant metal component with greater wear resistance is arranged on the end face of one end of the clamping handle 7, the wear-resistant metal component provides extrusion and friction stirring action on the plastic material during the additive manufacturing process, and the wear-resistant metal component bears the main wear of the plastic material on the shoulder tool, thereby prolonging the service life of the shoulder tool; since only the wear-resistant metal component uses wear-resistant materials with a higher price, the manufacturing cost of the shoulder tool is effectively reduced.

[0034] In an embodiment of the application, the wear-resistant plane is used to provide extrusion and friction stirring action on the plastic material during the additive manufacturing process, and the wear-resistant plane is circular, of course, the shape of the wear-resistant plane is not limited to this, and is determined according to actual production requirements.

[0035] In an embodiment of the application, the bar channel 1 is used as a conveying channel of the bar, and the bar is continuously sent out from the bar channel 1 and plasticized after being rubbed against the base plate to generate heat during the additive manufacturing process. The bar channel 1 is arranged along the length direction of the clamping handle 7, the bar channel 1 penetrates through the clamping handle 7, and ports are formed at both ends of the clamping handle 7. The central axis of the bar channel 1 is coaxial with the central axis of the clamping handle 7, that is, the bar channel 1 is coaxially arranged with the clamping handle 7. In the embodiment, the cross section of the bar channel 1 is rectangular, of course, the cross section shape of the bar channel 1 is not limited to this, and can also be other shapes, and is determined according to actual needs.

[0036] In a preferred embodiment of the application, 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 adopting fluid polishing when the shoulder tool is processed, so as to reduce the friction resistance during feeding.

[0037] In an embodiment of the application, the clamping handle 7 is in the shape of a cylinder, and the cooperation precision grade of the clamping handle 7 and the main shaft is h6, so as to ensure the reliability and stability of the shoulder installation.

[0038] In one embodiment of the present application, the end face of one end of the clamping handle 7 is provided with a positioning groove 5, which is used to install the wear-resistant metal assembly and plays a positioning role on the wear-resistant metal assembly. The positioning groove 5 provides a mounting position for the wear-resistant metal assembly and plays a positioning role on the wear-resistant metal assembly, preventing the wear-resistant metal assembly from moving. The positioning groove 5 is a circular groove, but the shape of the positioning groove 5 is not limited to this and is determined according to the shape of the wear-resistant metal assembly.

[0039] In one preferred embodiment of the present application, the outer circumferential surface of one end of the clamping handle 7 is provided with an outer taper surface. The outer taper surface is provided on the outer circumferential surface 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 being beneficial to heat management in the friction stir additive process.

[0040] In one embodiment of the present application, the wear-resistant metal assembly is embedded in the positioning groove 5, and the thickness of the wear-resistant metal assembly is greater than the depth of the positioning groove 5, so that part of the wear-resistant metal assembly protrudes out of the positioning groove 5. Specifically, the height of the wear-resistant metal assembly protruding out of the positioning groove 5 is 0.8 times the depth of the positioning groove 5. By making part of the wear-resistant metal assembly protrude out of the positioning groove 5, the wear-resistant flat surface provides extrusion and friction stirring effects on the plastic material during the additive manufacturing process, and the clamping handle 7 will not be worn, thereby further prolonging the service life of the shoulder tool.

[0041] It should be noted that the thickness of the wear-resistant metal assembly refers to the size along the length direction of the clamping handle 7, i.e. Figure 2 the size in the up-down direction.

[0042] In one embodiment of the present application, the wear-resistant metal assembly includes a plurality of wear-resistant alloy blocks 2, which are arranged in sequence in the circumferential direction to enclose an opening in communication with the bar channel 1. 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 to form a wear-resistant flat surface on the side away from the clamping handle 7, and the opening is located at the center of the wear-resistant flat surface.

[0043] In one embodiment of the present application, the wear-resistant metal assembly includes four wear-resistant alloy blocks 2, each of which has the same shape and size. With such a setting, when the wear-resistant alloy blocks 2 are installed, there is no need to consider the installation position of each wear-resistant alloy block 2, effectively simplifying the installation method of the wear-resistant shoulder tool, shortening the installation time, and improving the installation efficiency. Of course, the number of wear-resistant alloy blocks 2 is not limited to this and can be five, six or more, 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, but the material of the wear-resistant alloy block 2 is not limited to this and is determined according to actual needs.

[0044] In one embodiment of the present application, the wear-resistant alloy block 2 is provided with at least one wear-resistant alloy countersunk hole 6, the wear-resistant alloy countersunk hole 6 penetrates 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, 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 hole 6, the threaded hole 9 is coaxially arranged with the wear-resistant alloy countersunk hole 6, and the wear-resistant bolt 3 is threadedly connected with the corresponding threaded hole 9.

[0045] In one embodiment of the present application, the wear-resistant alloy block 2 is provided with a first plane on the side facing the opening, and the wear-resistant alloy block 2 is provided with a second plane on one end. In the adjacent two 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 plurality of wear-resistant alloy blocks 2 cooperatively enclose the opening. In this embodiment, the wear-resistant alloy block 2 is provided with four wear-resistant alloy blocks 2, and the first planes of the adjacent two wear-resistant alloy blocks 2 are perpendicular, thereby enclosing a rectangular opening.

[0046] Preferably, the wear-resistant alloy block 2 is provided with an arc surface on the side facing the inner wall of the positioning groove 5, the arc surface has an arc similar to that of the inner wall of the positioning groove 5, the arc surface of the wear-resistant alloy block 2 abuts against the inner wall of the positioning groove 5, the wear-resistant alloy block 2 is limited by the inner wall of the positioning groove 5, and the wear-resistant bolt 3 of the wear-resistant alloy block 2 is prevented 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 the adjacent two wear-resistant alloy blocks 2, when one of the wear-resistant alloy blocks 2 is subjected to an external force, the other wear-resistant alloy block 2 abuts against the wear-resistant alloy block 2 and abuts against the side wall of the positioning groove 5, thereby limiting the wear-resistant alloy block 2 from two directions to prevent the wear-resistant alloy block 2 from loosening.

[0047] In one embodiment of the present application, the cross-sectional area of the bar channel 1 is equal to the cross-sectional area of the opening. In this embodiment, the cross-section of the bar channel 1 and the cross-section of the opening are both rectangular, and the width and length of the cross-section of the bar channel 1 are equal to the length and width of the cross-section of the opening. In this way, no step is formed at the connection between the bar channel 1 and the opening, thereby reducing the frictional resistance during feeding.

[0048] In one embodiment of the present application, the wear-resistant alloy block 2 is provided with wear-resistant alloy positioning keys 10 on the side facing the clamping handle 7, which are integrally formed with the wear-resistant alloy block 2, and can also be connected by welding or interference fit. The bottom wall of the positioning groove 5 is provided with a plurality of positioning key grooves 8, and the wear-resistant alloy positioning keys 10 are correspondingly embedded in the positioning key grooves 8. By embedding the wear-resistant alloy positioning keys 10 in the corresponding positioning key grooves 8, the wear-resistant alloy positioning keys 10 and the positioning key grooves 8 cooperate to position the wear-resistant alloy block 2, and in combination with the fixing effect of the wear-resistant bolts 3, the stability of the wear-resistant alloy block 2 is effectively improved, preventing the wear-resistant alloy block 2 from loosening during use.

[0049] In one embodiment of the present application, the cross sections of the wear-resistant alloy positioning keys 10 and the positioning key grooves 8 are non-circular. When the wear-resistant alloy positioning keys 10 are embedded in the positioning key grooves 8, since the cross sections of the wear-resistant alloy positioning keys 10 and the positioning key grooves 8 are non-circular, the wear-resistant alloy block 2 is limited from rotating around the axis of the wear-resistant bolts 3, further improving the stability of the wear-resistant alloy block 2.

[0050] Specifically, in the present embodiment, the thickness of the wear-resistant alloy positioning keys 10 is equal to the depth of the positioning key grooves 8, the cross section of the wear-resistant alloy positioning keys 10 is elliptical, and the cross section of the positioning key grooves 8 is elliptical. Of course, the cross-sectional shapes of the wear-resistant alloy positioning keys 10 and the positioning key grooves 8 are not limited to elliptical, but can also be triangular, rectangular or other shapes.

[0051] In one embodiment of the present application, the wear-resistant alloy countersunk hole 6 penetrates 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. Of course, the wear-resistant alloy countersunk hole 6 and the wear-resistant alloy positioning key 10 can also be arranged non-coaxially.

[0052] The locating keyway 8 is connected to the threaded hole 9, and the locating keyway 8 and the threaded hole 9 are coaxially arranged. This arrangement has the following three advantages: First, it reduces the area occupied by the wear-resistant alloy countersunk hole 6 and the threaded hole 9. Since the size of the locating groove 5 is small, connecting the locating keyway 8 to the threaded hole 9 and setting them coaxially reduces the total area occupied by the wear-resistant alloy countersunk hole 6 and the threaded hole 9, allowing for the adaptation to smaller locating grooves 5. Second, it reduces the machining amount when drilling. Since the threaded hole 9 is located within the locating keyway 8, the threaded hole 9 can be made shorter, reducing the machining amount. Third, it facilitates the assembly of the wear-resistant alloy block 2. After the wear-resistant alloy locating key 10 is embedded into the locating keyway 8, the wear-resistant alloy countersunk hole 6 will automatically align with the threaded hole 9 because the locating keyway 8 and the threaded hole 9 are coaxially arranged. This eliminates the need for separate alignment of the wear-resistant alloy countersunk hole 6 and the threaded hole 9, simplifying the assembly process and improving assembly efficiency.

[0053] In one embodiment of the present invention, a flange 4 is provided on the outer peripheral surface of the clamping handle 7. The flange 4 is used to connect to the spindle. The flange 4 is provided with multiple bolt holes, which are arranged at intervals along the circumference. The flange 4 and the spindle are connected together by bolts. A positioning block is provided on the spindle, and a positioning groove 5 is provided on the edge of the flange 4. The positioning block and the positioning groove 5 are positioned and engaged to ensure that the bar material channel 1 of the spindle is completely aligned with the bar material channel 1 of the clamping handle 7. This simplifies the assembly method of the wear-resistant shoulder tool and further improves the assembly efficiency.

[0054] The following is combined Figures 1 to 4 A specific embodiment of the present invention is described, such as Figures 1 to 4 As shown, the wear-resistant shoulder tool for friction stir additive manufacturing includes a clamping shank 7 and a wear-resistant metal component. The clamping shank 7 has a bar material channel 1 inside. The wear-resistant metal component is disposed on the end face of one end of the clamping shank 7. The wear resistance of the wear-resistant metal component is greater than that of the clamping shank 7. The side of the wear-resistant metal component away from the clamping shank 7 has a wear-resistant surface.

[0055] The clamping handle 7 is cylindrical, and the fitting accuracy grade between the clamping handle 7 and the spindle is h6. A positioning groove 5 is provided on the end face of one end of the clamping handle 7, and the positioning groove 5 is a circular groove. An outer conical surface is provided on the outer peripheral surface of one end of the clamping handle 7, and the outer conical surface is arranged in a ring.

[0056] The bar material channel 1 is arranged along the length direction of the clamping handle 7. The bar material channel 1 passes through the clamping handle 7 and has ports formed at both ends of the clamping handle 7. The bar material channel 1 is coaxial with the clamping handle 7. The cross-section of the bar material channel 1 is rectangular and the roughness of the inner surface of the bar material channel 1 is less than 0.2.

[0057] The wear-resistant metal assembly is embedded in the positioning groove 5, and the thickness of the wear-resistant metal assembly is greater than the depth of the positioning groove 5, so that part of the wear-resistant metal assembly protrudes from the positioning groove 5. The wear-resistant metal assembly includes four wear-resistant alloy blocks 2, which are arranged in sequence along the circumference to enclose an opening in communication with the bar channel 1. The four wear-resistant alloy blocks 2 are spliced to form a circular plate body, and the thicknesses of the four wear-resistant alloy blocks 2 are equal. The four wear-resistant alloy blocks 2 are spliced to form a wear-resistant flat surface on the side away from the clamping handle 7, and the opening is located at the center of the wear-resistant flat surface. The side of the wear-resistant alloy block 2 facing the opening is provided with a first flat surface, and one end of the wear-resistant alloy block 2 is provided with a second flat surface. The side of the wear-resistant alloy block 2 facing the inner wall of the positioning groove 5 is provided with an arc surface, and the curvature of the arc surface is similar to that of the inner wall of the positioning groove 5. The arc surface of the wear-resistant alloy block 2 abuts against the inner wall of the positioning groove 5. Among the two adjacent wear-resistant alloy blocks 2, the first flat surface of one wear-resistant alloy block 2 abuts against the second flat surface of the other wear-resistant alloy block 2, and the second flat surfaces of the four wear-resistant alloy blocks 2 cooperatively enclose a rectangular opening. The cross section of the bar channel 1 and the cross section of the opening are both rectangular, and the cross section width and length of the bar channel 1 are equal to the cross section length and width of the opening.

[0058] The wear-resistant alloy block 2 is provided with a wear-resistant alloy countersunk hole 6, the wear-resistant alloy countersunk hole 6 penetrates through the wear-resistant alloy block 2, the wear-resistant alloy countersunk hole 6 is a circular hole, and 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, and the bottom wall of the positioning groove 5 is provided with four threaded holes 9 corresponding to the wear-resistant alloy countersunk hole 6. The threaded holes 9 are coaxially arranged with the wear-resistant alloy countersunk hole 6, and the wear-resistant bolt 3 is threadedly connected with the corresponding threaded hole 9.

[0059] The side of the wear-resistant alloy block 2 facing the clamping handle 7 is provided with a wear-resistant alloy positioning key 10, and 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 grooves 8, and the wear-resistant alloy positioning key 10 is embedded in the positioning key groove 8 in a one-to-one correspondence. The thickness of the wear-resistant alloy positioning key 10 is equal to the depth of the positioning key groove 8, and the cross section of the wear-resistant alloy positioning key 10 is elliptical. The cross section of the positioning key groove 8 is elliptical. The wear-resistant alloy countersunk hole 6 penetrates 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 groove 8 and the threaded hole 9 are in communication, and the positioning key groove 8 and the threaded hole 9 are coaxially arranged.

[0060] The outer circumferential surface of the clamping handle 7 is provided with a flange 4, and the flange 4 is used for connecting with the main shaft. The flange 4 is provided with eight bolt holes, which are arranged at intervals along the circumference. The flange 4 and the main shaft are connected together by bolts. The main shaft is provided with a positioning block, and the edge of the flange 4 is provided with a positioning groove 11. The positioning block and the positioning groove 11 are positioned and matched.

[0061] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; and although the present application has been described in detail with reference to the foregoing embodiments, it should be appreciated by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A wear-resistant shoulder tool for friction stir additive manufacturing, characterized in that, include: Clamping handle (7), the interior of which has bar material channel (1); A wear-resistant metal component is disposed 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). The side of the wear-resistant metal component away from the clamping handle (7) has a wear-resistant surface. The end face of one end of the clamping handle (7) is provided with a positioning groove (5), and the wear-resistant metal component is embedded in the positioning groove (5). 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 multiple wear-resistant alloy blocks (2), which are arranged sequentially along the circumference to form an opening communicating with the bar material channel (1). The multiple wear-resistant alloy blocks (2) are spliced ​​together on the side away from the clamping handle (7) to form the wear-resistant plane. The wear-resistant alloy block (2) is provided with at least one wear-resistant alloy countersunk hole (6), and a wear-resistant bolt (3) is provided 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) that correspond one-to-one with the wear-resistant alloy countersunk hole (6). The wear-resistant bolt (3) is threadedly engaged with the corresponding threaded hole (9). The wear-resistant alloy block (2) has a first plane on one side facing the opening, and a second plane on one end of the wear-resistant alloy block (2); in 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 the opening.

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

3. The wear-resistant shoulder tool for friction stir additive manufacturing according to claim 1, characterized in that, The wear-resistant alloy block (2) is provided with a wear-resistant alloy positioning key (10) on the side facing the clamping handle (7), and the bottom wall of the positioning groove (5) is provided with a plurality of positioning keyways (8), and the wear-resistant alloy positioning key (10) is embedded in the positioning keyway (8) one by one.

4. The wear-resistant shoulder tool for friction stir additive manufacturing according to claim 3, characterized in that, The cross-sections of the wear-resistant alloy locating key (10) and the locating keyway (8) are both non-circular.

5. The wear-resistant shoulder tool for friction stir additive manufacturing according to claim 3, characterized in that, The wear-resistant alloy countersunk hole (6) passes through the wear-resistant alloy positioning key (10), the positioning keyway (8) communicates with the threaded hole (9), and the positioning keyway (8) and the threaded hole (9) are coaxially arranged.

6. The wear-resistant shoulder tool for friction stir additive manufacturing according to any one of claims 1 to 5, characterized in that, The outer circumferential 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).

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