Friction stir additive manufacturing welding tool

Abstract

The utility model discloses a friction stir additive manufacturing welding tool, and belongs to the field of solid phase additive manufacturing. The friction stir additive manufacturing welding tool comprises a shaft sleeve and a friction stir welding rod, the main shaft comprises a working part assembled in the shaft sleeve, the working part comprises a cutting section, a containing section and a conveying section which are sequentially connected, the cutting section comprises a cutting rib protruding out of a main body of the working part in the radial direction, and the conveying section is provided with threads; the outer diameter of the cutting section and the outer diameter of the conveying section are both larger than the outer diameter of the containing section. By means of the structure, in the wire feeding friction stir additive manufacturing process, the phenomenon that due to the fact that a welding tool edge is discontinuous, wire blocking or unstable wire feeding always exists is solved, and the feeding stability in the friction stir additive manufacturing process is improved.

Description

Technical Field

[0001] The utility model belongs to the field of solid phase additive manufacturing, and specifically relates to a friction stir additive manufacturing welding tool. Background Art

[0002] Friction stir additive manufacturing is a new solid-phase additive manufacturing technology. During the additive manufacturing process, the material does not need to be melted and then solidified. Friction stir additive manufacturing is performed by cutting the material into particles.

[0003] In the related art, due to the discontinuity of the welding tool blade, wire blocking has always existed, so there is a problem of wire blocking during the wire feeding process of the wire feeder, which will cause the wire feeder to overheat, unstable wire feeding and other problems. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a friction stir additive manufacturing welding tool to solve the problem of wire blocking or unstable wire feeding due to the discontinuity of the welding tool blade, and improve the feeding stability in the friction stir additive manufacturing process.

[0005] According to the embodiment of the utility model, the friction stir additive manufacturing welding tool includes: a sleeve; a main shaft, the main shaft includes a working part assembled in the sleeve, the working part includes a cutting section, a receiving section and a conveying section connected in sequence, the cutting section includes a cutting rib protruding radially from the main body of the working section, the conveying section is formed as a thread, and the outer diameters of the cutting section and the conveying section are both larger than the outer diameter of the receiving section.

[0006] According to the friction stir additive manufacturing welding tool of the embodiment of the utility model, by providing a cutting section, a receiving section and a conveying section connected in sequence, the cut material particles are stored in the receiving section and then enter the conveying section for friction additive manufacturing. This can effectively alleviate the wire feeding fluctuation caused by the instability of the wire feeder and improve the feeding stability.

[0007] According to an embodiment of the utility model, there are a plurality of cutting ribs, and the plurality of cutting ribs are arranged at intervals along the circumference of the main shaft.

[0008] According to an embodiment of the present invention, the cutting rib is formed into an external thread shape.

[0009] According to an embodiment of the present invention, an extending direction of the cutting rib is parallel to the axial direction of the main shaft.

[0010] According to an embodiment of the utility model, a first feed port is provided on the shaft sleeve, and the first feed port is directly opposite to the cutting segment in the radial direction.

[0011] According to an embodiment of the utility model, a second feed port is provided on the shaft sleeve, and the second feed port is directly opposite to the accommodating section in the radial direction.

[0012] According to an embodiment of the utility model, an overflow port is provided on the shaft sleeve, and the overflow port is directly opposite to the conveying section.

[0013] According to an embodiment of the utility model, there are multiple overflow ports, and the multiple overflow ports are evenly spaced along the circumference of the shaft sleeve.

[0014] According to an embodiment of the utility model, the conveying section is formed as a single-start thread, a double-start thread, or a triple-start thread.

[0015] According to an embodiment of the utility model, the main shaft further comprises a driving part, the driving part is power-coupled to a power source, and an end of the driving part away from the power source is detachably connected to the working part.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic diagram of the cooperation between the main shaft and the shaft sleeve provided in the embodiment of the utility model;

[0019] Figure 2 It is a schematic diagram of a main shaft provided by an embodiment of the utility model;

[0020] Figure 3 It is another schematic diagram of a main shaft provided by an embodiment of the utility model;

[0021] Figure 4 This is another schematic diagram of a main shaft provided by an embodiment of the utility model.

[0022] Reference numerals: sleeve 1 , main shaft 2 , working portion 21 , cutting segment 211 , cutting rib 2111 , accommodating segment 212 , conveying segment 213 , first feed port 11 , second feed port 12 , overflow port 13 , driving portion 14 . DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0024] Reference below Figure 1-Figure 4 A friction stir additive manufacturing welding tool according to an embodiment of the present invention is described.

[0025] In some embodiments, the friction stir additive manufacturing welding tool includes: a sleeve 1 and a main shaft 2.

[0026] like Figure 1-3 As shown, the friction stir additive manufacturing welding tool includes a sleeve 1 and a spindle 2, the spindle 2 includes a working part 21 assembled in the sleeve 1, the working part 21 includes a cutting section 211, a receiving section 212 and a conveying section 213 connected in sequence, the cutting section 211 includes a cutting rib 2111 radially protruding from the main body of the working part 21, the conveying section 213 is formed as a thread, and the outer diameters of the cutting section 211 and the conveying section 213 are both larger than the outer diameter of the receiving section 212.

[0027] It can be understood that the spindle 2 of the stir friction additive manufacturing welding tool includes a working part 21, which is rotatably fitted in the sleeve 1. The working part 21 includes a cutting section 211, a receiving section 212 and a conveying section 213 connected in sequence. The cutting section 21 has a cutting rib 2111 radially protruding from the main body of the working part 21 for cutting materials, such as cutting wire into particles. The cut particle material is pushed to the receiving section 212 under the rotation of the cutting rib 2111. The receiving section 212 is a space formed by the working part 21 and the sleeve 1 extending in the axial direction, so as to accommodate The conveying section 213 is a threaded structure with an outer diameter larger than that of the containing section 212. The conveying section 213 is used to convey the material in the containing section 212. When a large amount of material is fed, the material is stored in the containing section 212. When a small amount of material is fed, the material in the containing section 212 is used. The conveying section 213 is a threaded structure with an outer diameter larger than that of the containing section 212. The conveying section 213 is used to cause the friction between particles and particles, particles and threads to generate heat under the action of thread rotation, thereby initially plasticizing the material and squeezing the material downward. When the material is transmitted to contact with the substrate, stirring friction occurs between the material and the substrate. The heat generated causes the particle / powder material to undergo plastic softening and forms a deposition layer on the substrate.

[0028] According to the friction stir additive manufacturing welding tool of the embodiment of the utility model, by adding a accommodating section 212 between the cutting section 211 and the conveying section 213, the accommodating section 212 is used to accommodate the granular material cut by the cutting section 211, and then push the material to the conveying section 213, which can effectively alleviate the feeding fluctuation caused by the instability of the feeder. When the feeding is large, the material is stored in the accommodating section 212, and when the feeding is small, the material in the accommodating section 212 is used, thereby avoiding the wire blocking phenomenon due to the discontinuity of the welding tool blade during the feeding friction stir additive manufacturing process. Therefore, the conveying section 213 can stably receive the material and enter the early plasticized state, and continuously and stably add material on the substrate, thereby improving the additive efficiency.

[0029] In some embodiments, there are multiple cutting ribs 2111 , and the multiple cutting ribs 2111 are arranged at intervals along the circumference of the main shaft 2 .

[0030] like Figure 2-3 As shown, a plurality of cutting ribs 2111 are arranged at intervals along the circumference of the main shaft 2. Under the rotation of the main shaft 2, the plurality of cutting ribs 2111 cut the wire into particles, and the particles are convenient for further friction and material addition.

[0031] According to the friction stir additive manufacturing welding tool of the embodiment of the utility model, a plurality of cutting ribs 2111 are arranged spaced apart along the circumference of the main shaft 2 to cut the wire into particles so that the wire can enter the early plasticization state in the conveying section 213, thereby improving the additive efficiency.

[0032] In some embodiments, the cutting rib 2111 is formed into an external thread shape.

[0033] like Figure 2 As shown, the cutting rib 2111 is formed into an external thread shape, and the thread lead angle can be 0°-80°. The cutting rib 2111 can adapt to different materials by changing the thread lead angle, that is, changing the cutting angle. For sticky materials, the thread lead angle can be set to 50°-80°. Increasing the thread angle can increase the blade length, increase the cutting time, and facilitate material cutting.

[0034] Optionally, in some embodiments, the extending direction of the cutting rib 2111 is parallel to the axial direction of the main shaft 2 .

[0035] like Figure 3 As shown, the extension direction of the cutting rib 2111 is parallel to the axial direction of the main shaft 2. For brittle materials, a 90° rise angle is used, that is, a vertical cutting edge is used to increase the number of cutting edges, improve cutting efficiency, and facilitate material cutting.

[0036] In some embodiments, a first feed port 11 is provided on the sleeve 1 , and the first feed port 11 is directly opposite to the cutting segment 211 in the radial direction.

[0037] like Figure 1As shown, a first feed port 11 is provided on the sleeve 1, and the first feed port 11 is radially opposite to the cutting section 211. There can be multiple first feed ports 11, and filamentary materials can be conveyed through the first feed port 11 to facilitate the filamentary materials to be cut into particles in the cutting section 211. The granular materials are rotated and pushed by the cutting ribs 2111 to enter the accommodating section 212, and then enter the conveying section 213 for friction reinforcement.

[0038] According to the friction stir additive manufacturing welding tool of the embodiment of the utility model, by setting the first feed port 11 to be radially opposite to the cutting section 211, it is convenient to cut the filamentary material into particles in the cutting section 211, and the granular materials are easier to be squeezed and plasticized by friction, thereby facilitating the friction additive manufacturing of the conveying section 213 and improving the additive efficiency.

[0039] In some embodiments, the shaft sleeve 1 is provided with a second feed port 12 , and the second feed port 12 is directly opposite to the accommodating section 212 in the radial direction.

[0040] like Figure 1 As shown, the shaft sleeve 1 is provided with a second feed port 12, which is radially opposite to the accommodating section 212. There can be multiple second feed ports 12. Granular materials that do not need to be cut can be transported through the second feed port 12. The granular materials directly enter the accommodating section 212 and then enter the conveying section 213 for friction material enhancement.

[0041] According to the friction stir additive manufacturing welding tool of the embodiment of the utility model, by arranging the second feed port 12 to be radially opposite to the accommodating section 212, it is convenient to directly convey granular material to the friction stir additive manufacturing welding tool, so that the granular material directly enters the accommodating section 212, which can simplify the friction additive manufacturing process.

[0042] In some embodiments, an overflow port 13 is provided on the shaft sleeve 1 , and the overflow port 13 is directly opposite to the conveying section 213 .

[0043] like Figure 1 As shown, the shaft sleeve 1 is provided with an overflow port 13, which is directly opposite to the conveying section 213. The conveying section 213 generates heat by friction between particles and particles, particles and threads under the action of thread rotation, thereby initially plasticizing the material and squeezing the material downward. At the same time, the overflow port 13 is used to allow excess material to overflow from the overflow port 213.

[0044] According to the friction stir additive manufacturing welding tool of the embodiment of the utility model, an overflow port 13 is provided on the shaft sleeve, and the overflow port 13 is directly opposite to the conveying section 213. When the thread of the conveying section 213 rotates to make the granular material enter the early plasticized state and extrude the additive downward, the excess material overflows from the overflow port 13, thereby avoiding the problems of clogging of the conveying section 213, local overheating and unstable feeding caused by excessive feeding speed, thereby improving the stability of the additive.

[0045] In some embodiments, there are multiple overflow ports 13 , and the multiple overflow ports 13 are evenly spaced along the circumference of the sleeve 1 .

[0046] like Figure 1 As shown, there are multiple overflow ports 13 , which are evenly spaced along the circumference of the sleeve 1 . Under the action of the threaded rotation of the conveying section 213 , excess material can overflow from the multiple circumferential overflow ports 13 of the sleeve 1 .

[0047] According to the friction stir additive manufacturing welding tool of the embodiment of the utility model, multiple overflow ports 13 are evenly spaced along the circumference of the sleeve 1. During the process of the threaded rotation of the conveying section 213 causing the granular material to enter a pre-plasticized state and squeeze the additive downward, excess material is evenly overflowed from the multiple overflow ports 13 in the circumferential direction, thereby improving the overflow efficiency, avoiding the problem of local overheating and unstable feeding caused by blockage of the conveying section 213, and improving the additive stability.

[0048] In some embodiments, the transmission section 213 is formed as a single-start thread, a double-start thread, or a triple-start thread.

[0049] like Figure 2-4 As shown, the transmission section 213 can be formed into a single-start thread, a double-start thread, or a triple-start thread, and different thread types can be flexibly selected according to material properties or additive rate.

[0050] According to the friction stir additive manufacturing welding tool of the embodiment of the utility model, the conveying section 213 can be formed into a single-start thread, a double-start thread, or a triple-start thread, so as to flexibly select the thread type of the conveying section 213. The multi-start thread design facilitates the conveying of materials and increases the deposition speed.

[0051] In some embodiments, the main shaft 2 further includes a driving portion 14 , which is power-coupled to a power source, and an end of the driving portion 14 away from the power source is detachably connected to the working portion 21 .

[0052] like Figure 1-4 As shown, the main shaft 2 also includes a driving part 14, which is power-coupled with a power source. The power source drives the driving part 14 to rotate, and drives the main shaft 2 to rotate, thereby driving the cutting section 211 and the conveying section 213 to rotate. The cutting ribs 2111 of the cutting section 211 rotate to cut the material. The cut granular material is pushed to the accommodating section 212 for material storage under the rotation of the cutting ribs 2111. The threaded structure of the conveying section 213 is used to cause the material in the accommodating section 212 to generate heat through friction between particles and particles, particles and threads under the rotation of the threads, thereby preliminarily plasticizing the material and squeezing the material downward. When the material is transmitted to contact with the substrate, stirring friction occurs between the material and the substrate, and the heat generated causes the granular / powder material to undergo plastic softening and form a deposition layer on the substrate.

[0053] The end of the driving part 14 away from the power source is detachably connected to the working part 21. When the working part 21 is worn during the rotation and friction, the working part 21 can be replaced. The cutting section 211, the accommodating section 212 and the conveying section 213 can be detachably connected. The cutting section 211, the accommodating section 212 or the conveying section 213 can be replaced separately to replace the worn parts without replacing the entire working part 21. Further, as Figure 4 As shown, the driving portion 14 can be connected to the conveying section 213 alone and directly used for friction enhancement of the granular material.

[0054] According to the friction stir additive manufacturing welding tool of the embodiment of the utility model, the driving part 14 is provided to be coupled with the power source to facilitate driving the working part 21 to rotate, so as to drive the cutting segment 211 to rotate and cut the material into particles. The conveying segment 213 rotates to make the particle material generate heat by initial friction and plasticize the additive on the substrate. The end of the driving part 14 away from the power source is detachably connected to the working part 21 to replace the working part 21 or replace the cutting segment 211, the accommodating segment 212 or the conveying segment 213 separately, which is convenient for replacing worn parts. At the same time, the driving part 14 can be flexibly selected to be directly connected to the conveying segment 213 according to the type of material to carry out friction stir additive manufacturing of the particle material. The structure is simple and convenient for disassembly and assembly.

[0055] In one embodiment, a friction stir additive manufacturing welding tool according to an embodiment of the utility model includes: a sleeve 1 and a spindle 2, the spindle 2 includes a working part 21, the working part 21 has a cutting section 211, a receiving section 212 and a conveying section 213, the cutting section 21 has a cutting rib 2111, and the sleeve 1 includes a first feed port 11, a second feed port 12, an overflow port 13 and a driving part 14. During the additive process of the friction stir additive manufacturing welding tool, the driving part 14 drives the main shaft 2 to rotate and move to the additive position, the main shaft drives the working part 21 to rotate, the first feed port 11 conveys the filamentary material to the cutting section 211, the cutting rib 2111 rotates to cut the filamentary material into granular material and pushes it to the accommodating section 212, the accommodating section 212 can store the material, the material in the accommodating section 212 can further enter the conveying section 213, the second feed port 12 conveys the granular material that does not need to be cut to the accommodating section 212 and then into the conveying section 213, under the action of the rotation of the thread, the conveying section 213 causes friction between the particles and the particles and the particles and the thread to generate heat, thereby preliminarily plasticizing the material and squeezing the material downward, when the material is transmitted to contact with the substrate, stir friction occurs between the material and the substrate, the heat generated causes the granular / powder material to be plastically softened, and a deposition layer is formed on the substrate, the overflow port 13 is used to overflow the material when there is too much material in the conveying section 213.

[0056] In another embodiment, a friction stir additive manufacturing welding tool according to an embodiment of the utility model includes: a sleeve 1 and a spindle 2, the spindle 2 includes a working part 21, the working part 21 has a cutting section 211, a receiving section 212 and a conveying section 213, the cutting section 21 has a cutting rib 2111, and the sleeve 1 includes a first feed port 11, a second feed port 12, an overflow port 13 and a driving part 14. During the additive process of the friction stir additive manufacturing welding tool, the driving unit 14 drives the main shaft 2 to rotate and move to the additive position, the main shaft drives the working unit 21 to rotate, the first feed port 11 conveys the filamentary material to the cutting section 211, the cutting rib 2111 rotates to cut the filamentary material into granular material and pushes it to the accommodating section 212, the accommodating section 212 can store the material, the material in the accommodating section 212 can further enter the conveying section 213, the conveying section 213, under the action of the rotation of the thread, the friction between the particles and the particles and the threads generates heat, thereby preliminarily plasticizing the material and squeezing the material downward, when the material is transmitted to contact with the substrate, stirring friction occurs between the material and the substrate, the heat generated causes the granular / powder material to undergo plastic softening, and a deposition layer is formed on the substrate, the overflow port 13 is used to overflow the material when there is too much material in the conveying section 213.

[0057] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0058] In the description of the present invention, "plurality" means two or more.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", 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 utility model. In this specification, the schematic representation 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.

[0060] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A friction stir additive manufacturing welding tool, characterized in that: include: Bushings; The main shaft comprises a working part assembled in the sleeve, the working part comprises a cutting section, a receiving section and a conveying section connected in sequence, the cutting section comprises a cutting rib radially protruding from the main body of the working part, the conveying section is formed as a thread, and the outer diameters of the cutting section and the conveying section are both larger than the outer diameter of the receiving section.

2. The friction stir additive manufacturing welding tool according to claim 1, characterized in that: There are a plurality of cutting ribs, and the plurality of cutting ribs are arranged at intervals along the circumferential direction of the main shaft.

3. The friction stir additive manufacturing welding tool according to claim 1, characterized in that: The cutting rib is formed in an external thread shape.

4. The friction stir additive manufacturing welding tool according to claim 1, characterized in that: The extending direction of the cutting rib is parallel to the axial direction of the main shaft.

5. The friction stir additive manufacturing welding tool according to claim 1, characterized in that: The shaft sleeve is provided with a first feed opening, and the first feed opening is directly opposite to the cutting section in radial direction.

6. The friction stir additive manufacturing welding tool according to claim 5, characterized in that: The shaft sleeve is provided with a second feed opening, and the second feed opening is directly opposite to the accommodating section in the radial direction.

7. The friction stir additive manufacturing welding tool according to claim 1, characterized in that: The shaft sleeve is provided with an overflow port, and the overflow port is directly opposite to the conveying section.

8. The friction stir additive manufacturing welding tool according to claim 7, characterized in that: There are multiple overflow openings, and the multiple overflow openings are evenly spaced along the circumference of the sleeve.

9. The friction stir additive manufacturing welding tool according to claim 1, characterized in that: The conveying section is formed as a single-start thread, a double-start thread, or a triple-start thread.

10. The friction stir additive manufacturing welding tool according to claim 1, characterized in that: The main shaft further comprises a driving part, which is power-coupled to a power source, and one end of the driving part away from the power source is detachably connected to the working part.

Images