CN114393292B - Friction stir welding additive manufacturing device and method capable of continuously feeding rod - Google Patents
Friction stir welding additive manufacturing device and method capable of continuously feeding rod Download PDFInfo
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- CN114393292B CN114393292B CN202111616078.2A CN202111616078A CN114393292B CN 114393292 B CN114393292 B CN 114393292B CN 202111616078 A CN202111616078 A CN 202111616078A CN 114393292 B CN114393292 B CN 114393292B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/1245—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding characterised by the apparatus
- B23K20/1255—Tools therefor, e.g. characterised by the shape of the probe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/26—Auxiliary equipment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The invention discloses a friction stir welding additive manufacturing device and a method capable of continuously feeding bars, wherein the friction stir welding additive manufacturing device comprises a welding mechanism, a first feeding mechanism, a second feeding mechanism and a feeding mechanism, the welding mechanism is used for stirring friction additive positions and guiding bars to axially move towards the additive positions, the first feeding mechanism is used for driving the bars to axially move towards the additive positions, the second feeding mechanism is used for driving the bars to axially move towards the first feeding mechanism, the second feeding mechanism is arranged between the welding mechanism and the first feeding mechanism and is located at the side of the bars which axially move, the feeding mechanism is arranged between the first feeding mechanism and the second feeding mechanism and is located at the side of the bars which axially move, and the first feeding mechanism and the second feeding mechanism alternately drive a plurality of bars to continuously move towards the additive positions. The automatic continuous feeding device for the bars realizes automatic continuous feeding of the bars, and a stopping device is not needed in the process of material adding.
Description
Technical Field
The invention belongs to the technical field of welding, and particularly relates to a friction stir welding additive manufacturing device and method capable of continuously feeding bars.
Background
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
At present, a fusion welding method is mostly adopted in additive manufacturing (3D printing) of metals, namely, laser, electric arc, electron beam and the like are adopted as heat sources, the working temperature is higher than the melting point of materials, the base metal is melted, defects such as air holes and cracks are easy to generate during solidification, and the performance of 3D printed parts is reduced. Friction stir welding is a technology for plasticizing and flowing materials to form welding seams by utilizing friction heat generation and stirring action between a shaft shoulder and a stirring pin and a workpiece, and weld metal is not melted, so that the defects of air holes, cracks and the like are avoided, the deformation is small, and grains are refined.
Therefore, the metal additive manufacturing by friction stir welding, especially the additive manufacturing of light metals such as aluminum alloy, magnesium alloy and the like, can obtain high-performance parts with fine grains, no air holes and no cracks. At present, the feeding mode of friction stir welding additive manufacturing (Fiction stir additive manufacturing, FSAM) comprises the types of plates, bars, wires, powder, particles and the like, wherein an FSAM device which takes the plates as the feeding is the simplest, and the common friction stir welding device can be realized, but the shape of a printed part is greatly limited; the tooling is complex, and the plates are required to be milled flat and the tooling is repeated after each layer of welding is finished, so that a great deal of time is wasted. FSAM taking powder as feed can automatically prepare metal powder from a source to obtain materials with any components, but the price of raw materials is high, the requirement on the granularity of the powder is high, a discharge hole is easy to block and the powder is easy to splash in the welding process, and a certain dust explosion risk exists. FSAM taking wires as feed can realize continuous feed of raw materials, but compared with bars, the wires are poorer in rigidity and easy to extrude out of the shaft shoulder of the stirring head; in addition, the diameter of the wire is smaller, and when the efficiency of the material increase is lower and the width of the material increase is larger, the requirement on the wire feeding speed is higher. The FSAM raw material fed by the bar is low in cost and high in efficiency, but the biggest problem is discontinuous feeding process.
Therefore, how to realize friction stir welding additive manufacturing with low cost, high efficiency, continuous feeding, high material availability and printing of various metal materials is an important research point and hot spot in the field.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is how to realize continuous rod feeding and material adding in the friction stir welding process.
In order to solve the technical problems, the invention provides a friction stir welding additive manufacturing device capable of continuously feeding bars, which comprises a welding mechanism, a first feeding mechanism, a second feeding mechanism and a feeding mechanism, wherein the welding mechanism is used for stirring friction additive positions and guiding bars to axially move towards the additive positions, the first feeding mechanism is used for driving the bars to axially move towards the additive positions, the second feeding mechanism is used for driving the bars to axially move towards the first feeding mechanism, the second feeding mechanism is arranged between the welding mechanism and the first feeding mechanism and is positioned at the side of the bars which axially move, the feeding mechanism is arranged between the first feeding mechanism and the second feeding mechanism and is positioned at the side of the bars which axially move, and the first feeding mechanism and the second feeding mechanism alternately drive a plurality of bars to continuously move towards the additive positions;
in the first working state, the first feeding mechanism drives the post-feeding bar to axially move towards the material adding position, meanwhile, the post-feeding bar drives the pre-feeding bar to axially move towards the material adding position, and meanwhile, the second feeding mechanism loosens the post-feeding bar, positions the post-feeding bar;
under the second working condition, the second feeding mechanism drives the first feeding bar to move towards the material adding position, and meanwhile the first feeding mechanism loosens the first feeding bar and then the feeding mechanism drives the second feeding bar to move sideways towards the first feeding mechanism.
In one embodiment of the invention, the first feeding mechanism is a pushing type feeding mechanism for pushing the bar to axially move.
In one embodiment of the invention, the second feeding mechanism is a clamping feeding mechanism for clamping and driving the bar to axially move.
In one embodiment of the invention, the second feeding mechanism comprises a clamping assembly for releasably clamping the bar and a moving assembly for driving the clamping assembly to move along the axial direction of the bar.
In one embodiment of the invention, the feeding mechanism is a pushing type feeding mechanism for pushing the bars to move laterally, a plurality of bars are buffered on the feeding mechanism, and the feeding mechanism drives the bars to move laterally to the first feeding mechanism in sequence.
In one embodiment of the invention, the feeding mechanism comprises a guide assembly for guiding the bar to move axially after moving laterally and a side pushing assembly for pushing the bar to move laterally.
In one embodiment of the invention, the welding mechanism comprises a stirring head, a tool handle, a main shaft and a fixing pipe, wherein the stirring head is fixed on the tool handle, the tool handle is fixed on the main shaft, and the fixing pipe penetrates through the main shaft, the tool handle and the stirring head.
The invention also provides another technical scheme: the friction stir welding additive manufacturing method capable of continuously feeding the rod adopts the friction stir welding additive manufacturing device, and comprises the following steps:
step one, a plurality of bars are put between the first feeding mechanism and the welding mechanism until the bars extend out of the welding mechanism, and step two is carried out;
step two, the first feeding mechanism drives the nth bar to axially move towards the material adding position on the substrate, the welding mechanism starts to rotate, material adding is started, and the step three is performed;
and step three, repeating the following processes until the material addition is finished:
when a first feeding mechanism reaches a set position, a second feeding mechanism drives an nth bar to axially move towards a material adding position on a substrate after positioning the nth bar, the first feeding mechanism is reset, the feeding mechanism pushes an (n+1) th bar to laterally move to the first feeding mechanism, when the second feeding mechanism reaches the set position, the second feeding mechanism releases the nth bar, resets the (n+1) th bar to the nth bar, and the first feeding mechanism drives the nth bar to axially move towards the material adding position on the substrate.
In one embodiment of the invention, when the first feeding mechanism reaches the set position, the distance between the upper end of the nth bar and the feeding mechanism is 20-200mm, and when the second feeding mechanism reaches the set position, the distance between the upper end of the nth bar and the welding mechanism is 50-200mm.
In one embodiment of the invention, the diameter of the bar for material addition is 5-30mm, the length is 200-1000mm, the main shaft torque of the welding mechanism is more than or equal to 200 N.mm, the rotating speed of the welding mechanism is 500-3000r/min, the welding speed of the welding mechanism is 80-1000mm/min, the single-layer material addition thickness is 0.5-5mm, the feeding speeds of the first feeding mechanism and the second feeding mechanism are 50-1000mm/min, and the feeding speed of the feeding mechanism is 50-500mm/min.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
(1) Compared with the traditional manufacturing of the metal additive by fusion welding, the manufacturing device and the manufacturing method for the friction stir welding additive have the advantages that the working temperature of the friction stir welding additive manufacturing is lower than the melting point of the material, no defects such as air holes and cracks exist in the process of adding materials, the structure is thinned, the printed parts are excellent in comprehensive performance, and the like, automatic continuous feeding of the bars is realized, a stop device is not needed in the process of adding the bars, key holes generated by multiple material adding are avoided by manpower or a robot to a main shaft, the probability of occurrence of defects in the parts of the additive is reduced, the automatic friction stir welding additive manufacturing is enabled, and the manufacturing device and the manufacturing method are applicable to friction stir welding additive manufacturing of parts with various diameters and various material brands.
(2) Compared with friction stir welding additive manufacturing with plates as feed materials, the friction stir welding additive manufacturing device and method for continuously feeding the rods disclosed by the invention have the advantages that only the base plates are required to be fixed by the tool, the clamping layer by layer is not required, the tool time is shortened, and the efficiency of additive manufacturing is greatly improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application.
FIG. 1 is a schematic illustration of a continuously fed friction stir welding additive manufacturing apparatus of the present disclosure;
FIG. 2 is a schematic illustration of a continuously fed friction stir welding additive manufacturing process in accordance with the present disclosure;
FIG. 3 is a schematic illustration of a continuously fed friction stir welding additive manufacturing process of the present disclosure;
FIG. 4 is a schematic illustration of a continuously fed friction stir welding additive manufacturing process in accordance with the present disclosure;
FIG. 5 is a schematic illustration of a continuously fed friction stir welding additive manufacturing process of the present disclosure;
FIG. 6 is a schematic illustration of a continuously fed friction stir welding additive manufacturing process of the present disclosure;
fig. 7 is a schematic structural view of a stirring head disclosed in the invention.
Wherein, 1, the material adding position; 11. an additive layer; 12. an additive position; 13. the material adding position; 2. a bar; 3. a welding mechanism; 31. a stirring head; 32. a knife handle; 33. a main shaft; 34. a fixed tube; 4. a first feeding mechanism; 5. a second feeding mechanism; 51. a clamp; 52. a second cylinder or hydraulic cylinder; 53. lifting the guide rail; 54. a bracket; 6. a feeding mechanism; 61. translating the guide rail; 62. a slide block; 63. a third cylinder or hydraulic cylinder; 7. a substrate.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the improvements provided herein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof. In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, are merely relational terms determined for convenience in describing structural relationships of the various components or elements of the present disclosure, and do not denote any one of the components or elements of the present disclosure, and are not to be construed as limiting the present disclosure. In the present disclosure, terms such as "fixedly coupled," "connected," and the like are to be construed broadly and refer to either a fixed connection or an integral or removable connection; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms in the disclosure may be determined according to circumstances, and should not be interpreted as limiting the disclosure, for relevant scientific research or a person skilled in the art.
The following is a preferred embodiment for illustrating the present invention, but is not intended to limit the scope of the present invention.
Example 1
Referring to fig. 1 to 7, as shown in the drawings, a friction stir welding additive manufacturing apparatus capable of continuously feeding bars includes a welding mechanism 3 for stirring a friction additive position 1 and guiding a bar 2 to axially move toward the additive position, a first feeding mechanism 4 for driving the bar 2 to axially move toward the additive position, a second feeding mechanism 5 for driving the bar 2 to axially move toward the additive position, and a feeding mechanism 6 for driving the bar 2 to laterally move toward the first feeding mechanism 4, wherein the second feeding mechanism 5 is disposed between the welding mechanism 3 and the first feeding mechanism 4 and is located at a side of the bar 2 that axially moves, the feeding mechanism 6 is disposed between the first feeding mechanism 4 and the second feeding mechanism 5 and is located at a side of the bar 2 that axially moves, and the first feeding mechanism 4 and the second feeding mechanism 5 alternately drive a plurality of bars 2 to continuously move toward the additive position;
in the first working state, the first feeding mechanism 4 drives the post-feeding bar 2 to axially move towards the material adding position, meanwhile, the post-feeding bar drives the pre-feeding bar to axially move towards the material adding position, and meanwhile, the second feeding mechanism 5 loosens the post-feeding bar after positioning the post-feeding bar;
in the second working state, the second feeding mechanism 5 drives the pre-feeding bar to move towards the material adding position, and the first feeding mechanism 4 loosens the pre-feeding bar and then the feeding mechanism 6 drives the post-feeding bar to move laterally towards the first feeding mechanism 4.
The welding mechanism 3, the first feeding mechanism 4, the second feeding mechanism 5 and the feeding mechanism 6 are all fixed on a frame (not shown in the figure), so that the relative positions between the two mechanisms are kept unchanged during the welding process. The conveying speed of the bars in the feeding mechanism 6, how the first feeding mechanism 4 and the second feeding mechanism 5 work alternately, the respective movement speed, the rotation speed of the welding mechanism, the welding speed and the like are controlled by a numerical control system, so that the efficient cooperative work of the mechanisms is ensured. The first feeding mechanism 4 and the second feeding mechanism 5 alternately drive the bars to axially move in a relay manner. The additive layer 11, the added locations 12 and the to-be-added locations 13 can be seen in fig. 1. Compared with the traditional manufacturing of the metal additive by fusion welding, the working temperature of the manufacturing of the additive by friction stir welding is lower than the melting point of the material, the manufacturing process of the additive by friction stir welding has the advantages of fine structure, excellent comprehensive performance of printed parts and the like, automatic continuous feeding of the bars is realized, a stop device is not needed in the process of the additive, the bars are added to a main shaft manually or by a robot, key holes generated by multiple additive are avoided, the probability of occurrence of defects in the parts by the additive is reduced, the automatic manufacturing of the additive by friction stir welding is enabled to be possible, and the manufacturing process of the additive by friction stir welding is applicable to the manufacturing of the parts with various diameters and various material marks. Compared with friction stir welding additive manufacturing taking plates as feeding materials, the friction stir welding additive manufacturing method has the advantages that only the base plate needs to be fixed through the tool, clamping layer by layer is not needed, tool time is shortened, and efficiency of additive manufacturing is greatly improved.
In a preferred embodiment of this embodiment, the first feeding mechanism 4 is a pushing type feeding mechanism for pushing the rod to move axially. Specifically, the first feeding mechanism 4 includes a first cylinder or a hydraulic cylinder, and a piston rod of the first cylinder or the hydraulic cylinder abuts against and pushes the rod. In other embodiments it may also be: the first feeding mechanism is a clamping type feeding mechanism for clamping and driving the bar to axially move.
In a preferred embodiment of this embodiment, the second feeding mechanism 5 is a clamping feeding mechanism that clamps and drives the rod to move axially, and specifically, the second feeding mechanism includes a clamping assembly that is used for releasably clamping the rod, and a moving assembly that is used for driving the clamping assembly to move axially along the rod. The clamping assembly comprises a second air cylinder or a hydraulic cylinder 51 and a clamp 52, the second air cylinder 51 can control the clamp 52 to be in a clamping state or a loosening state according to the distance between the bar and the discharge hole, the moving assembly comprises a lifting guide rail 53, the second air cylinder or the hydraulic cylinder 51 is movably connected to the lifting guide rail 53, and the moving driving part drives the second air cylinder or the hydraulic cylinder 51 to move along the axial direction of the bar. In other embodiments it may also be: the second feeding mechanism is a pin type feeding mechanism with a pin shaft positioned to drive the bar to axially move.
In a preferred embodiment of the present embodiment, the feeding mechanism 6 is a pushing type feeding mechanism for pushing the rods to move laterally, a plurality of rods are buffered on the feeding mechanism 6, the feeding mechanism 6 drives the rods to move laterally to the first feeding mechanism 4 sequentially, and specifically, the feeding mechanism 6 includes a guiding assembly for guiding the rods to move laterally and then axially and a side pushing assembly for pushing the rods to move laterally. The guide assembly comprises a translation guide rail 61 for guiding the bar to move, one end of the translation guide rail 61 is provided with a through hole as a discharging hole of the bar, and the discharging hole is coaxially arranged with a piston rod of the first cylinder or the hydraulic cylinder. The side pushing assembly comprises a sliding block 62 contacted with the bar and a third air cylinder or hydraulic cylinder 63, wherein a piston rod of the third air cylinder or hydraulic cylinder 63 is connected with the sliding block 62, and the sliding block 62 pushes the bar 2 to move laterally. In other embodiments it may also be: the feeding mechanism is a clamping type feeding mechanism for clamping and driving the bar to move laterally.
In a preferred embodiment of the present embodiment, the welding mechanism 3 includes a stirring head 31, a handle 32, a main shaft 33, and a fixing pipe 34, the stirring head 31 is fixed to the handle 32, the handle 32 is fixed to the main shaft 33, and the fixing pipe 34 passes through the main shaft 33, the handle 32, and the stirring head 31. The main shaft 33, the tool handle 32 and the stirring head 31 are coaxially arranged, coaxial through holes are formed in the center of the main shaft 33, the through holes are larger than the diameter of the bar, a fixing pipe 34 is arranged between the main shaft 33 and the bar, the inner diameter and the outer diameter of the fixing pipe 34 are respectively matched with the inner diameter of the main shaft 33 and the outer diameter of the bar, the tool handle 32 is arranged on the main shaft 33, and the stirring head 31 is arranged on the tool handle 32. The outer diameter of the fixed pipe 34 is matched with the inner diameter of the main shaft 33, and the inner diameter of the fixed pipe 34 is matched with the diameter of the bar. The outer diameter of the fixed pipe 34 is fixed, the inner diameter is adjustable according to the diameter of the bar or the inner diameter and the outer diameter of the fixed pipe 34 are fixed, but the fixed pipe 34 with different inner diameters can be replaced according to the diameter of the bar. The stirring head 31 is divided into a clamping end, a transition zone and a welding functional zone. Unlike stirring heads for friction stir welding, stirring heads for material addition do not have stirring pins, and the outer diameter of a welding working area is 1.5-5 times of the diameter of a bar. The clamping end is connected with the cutter handle, and the inner diameter of the cutter handle is matched with the diameter of the clamping end of the stirring head.
The following describes a friction stir welding additive manufacturing method capable of continuously feeding a rod, the friction stir welding additive manufacturing device is adopted, and the friction stir welding additive manufacturing method comprises the following steps:
step one, putting a plurality of bars 2 between the first feeding mechanism 4 and the welding mechanism 3 until the bars 2 extend out of the welding mechanism 3;
step two, the first feeding mechanism 4 drives the nth bar to axially move towards the material adding position on the substrate 7, and the welding mechanism 3 starts to rotate and starts to add materials;
and step three, repeating the following processes until the material addition is finished:
when the first feeding mechanism 4 reaches the set position, the second feeding mechanism 5 positions the nth bar and then drives the nth bar to axially move towards the material adding position on the substrate 7, the first feeding mechanism 4 is reset, the feeding mechanism 6 pushes the (n+1) th bar to laterally move to the first feeding mechanism 4, when the second feeding mechanism 5 reaches the set position, the second feeding mechanism 5 releases the nth bar, resets the (n+1) th bar to the nth bar, and the first feeding mechanism 4 drives the nth bar to axially move towards the material adding position on the substrate 7.
The feeding mechanism is started, and the third cylinder or the hydraulic cylinder starts to work to push the sliding block so that the bars in the bar bin move on the lifting guide rail to enter the discharge hole positioned on the lifting guide rail. The spindle begins to rotate and the first cylinder or hydraulic cylinder begins to operate and the stirring head begins to move along the welding path as the bar comes into contact with the base plate. At this time, the clamp component is in a loosening state, and the piston rod of the first cylinder drives the nth bar to move in the material adding process. As shown in fig. 2.
The bar is driven by the first cylinder or the hydraulic cylinder to move until the bar is 20-200mm away from the discharge hole of the translation guide rail, as shown in figure 3.
Then the second cylinder or the hydraulic cylinder 52 enables the clamp 51 to clamp the nth bar, the clamp 51 is fixed on the bracket 54, the bracket 54 moves on the lifting guide rail 53 to drive the clamp 51 to move downwards, and further uniform downward feeding of the nth bar is achieved, and meanwhile the first cylinder starts to retract the piston rod, as shown in fig. 4.
The second feeding mechanism drives the bar to move until the bar is 50-200mm away from the main shaft inner fixed pipe, as shown in fig. 5.
The feeding mechanism is started, the third cylinder starts to work, and the slide block is pushed to enable the (n+1) th bar to move on the translation guide rail and enter the discharge port, as shown in fig. 6.
Then the first cylinder starts to work, the bar is accelerated at a speed higher than the bar feeding speed to push the bar downwards until the (n+1) bar is in contact with the (n) bar, at the moment, the clamp releases the bar, and the bar is driven by the first cylinder to move downwards at the same speed.
In a preferred embodiment of the present embodiment, when the first feeding mechanism reaches the set position, a distance between the upper end of the nth bar and the feeding mechanism is 20-200mm, and when the second feeding mechanism reaches the set position, a distance between the upper end of the nth bar and the welding mechanism is 50-200mm.
In one embodiment of the invention, the diameter of the bar for material addition is 5-30mm, the length is 200-1000mm, the main shaft torque of the welding mechanism is more than or equal to 200 N.mm, the rotating speed of the welding mechanism is 500-3000r/min, the welding speed of the welding mechanism is 80-1000mm/min, the single-layer material addition thickness is 0.5-5mm, the feeding speed of the first feeding mechanism and the second feeding mechanism is 50-1000mm/min, and the feeding speed of the feeding mechanism is 50-500mm/min.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A friction stir welding additive manufacturing device capable of continuously feeding bars comprises a welding mechanism for stirring friction additive positions and guiding bars to axially move towards the additive positions and a first feeding mechanism for driving the bars to axially move towards the additive positions,
the welding machine is characterized by further comprising a second feeding mechanism for driving the bars to axially move towards the material adding position and a feeding mechanism for driving the bars to laterally move towards the first feeding mechanism, wherein the second feeding mechanism is arranged between the welding mechanism and the first feeding mechanism and is positioned at the side of the bars which axially move, the feeding mechanism is arranged between the first feeding mechanism and the second feeding mechanism and is positioned at the side of the bars which axially move, and the first feeding mechanism and the second feeding mechanism alternately drive a plurality of bars to continuously move towards the material adding position;
in the first working state, the first feeding mechanism drives the post-feeding bar to axially move towards the material adding position, meanwhile, the post-feeding bar drives the pre-feeding bar to axially move towards the material adding position, and meanwhile, the second feeding mechanism loosens the post-feeding bar, positions the post-feeding bar;
in a second working state, the second feeding mechanism drives the first feeding bar to move towards the material adding position, and the first feeding mechanism loosens the first feeding bar and then the feeding mechanism drives the second feeding bar to move sideways towards the first feeding mechanism;
the first feeding mechanism is a pushing type feeding mechanism for pushing the bar to axially move;
the second feeding mechanism is a clamping type feeding mechanism for clamping and driving the bar to axially move.
2. The continuous stick feed friction stir welding additive manufacturing apparatus of claim 1 wherein the clamp feed mechanism comprises a clamp assembly for clamping the stick and a moving assembly for moving the clamp assembly in the axial direction of the stick.
3. The friction stir welding additive manufacturing device capable of continuously feeding bars according to claim 1, wherein the feeding mechanism is a pushing type feeding mechanism for pushing the bars to move laterally, a plurality of bars are buffered on the feeding mechanism, and the feeding mechanism drives the bars to move laterally to the first feeding mechanism in sequence.
4. A friction stir welding additive manufacturing apparatus according to claim 3 wherein the feed mechanism comprises a guide assembly for guiding the bar to move axially after moving laterally and a side pushing assembly for pushing the bar to move laterally.
5. The friction stir welding additive manufacturing apparatus of claim 1 wherein the welding mechanism comprises a stirring head, a handle, a spindle, and a securing tube, the stirring head being secured to the handle, the handle being secured to the spindle, the securing tube passing through the spindle, the handle, and the stirring head.
6. A friction stir welding additive manufacturing method capable of continuously feeding a rod, characterized in that the friction stir welding additive manufacturing device according to any one of claims 1 to 5 is adopted, and the friction stir welding additive manufacturing method comprises the following steps:
step one, a plurality of bars are put between the first feeding mechanism and the welding mechanism until the bars extend out of the welding mechanism, and step two is carried out;
step two, the first feeding mechanism drives the nth bar to axially move towards the material adding position on the substrate, the welding mechanism starts to rotate, material adding is started, and the step three is performed;
and step three, repeating the following processes until the material addition is finished:
when a first feeding mechanism reaches a set position, a second feeding mechanism drives an nth bar to axially move towards a material adding position on a substrate after positioning the nth bar, the first feeding mechanism is reset, the feeding mechanism pushes an (n+1) th bar to laterally move to the first feeding mechanism, when the second feeding mechanism reaches the set position, the second feeding mechanism releases the nth bar, resets the (n+1) th bar to the nth bar, and the first feeding mechanism drives the nth bar to axially move towards the material adding position on the substrate.
7. The friction stir welding additive manufacturing method according to claim 6, wherein when the first feeding mechanism reaches a set position, a distance between an upper end of an nth bar and the feeding mechanism is 20-200mm, and when the second feeding mechanism reaches the set position, a distance between an upper end of the nth bar and the welding mechanism is 50-200mm.
8. The friction stir welding additive manufacturing method according to claim 6, wherein the diameter of the rod for additive is 5-30mm, the length is 200-1000mm, the main shaft torque of the welding mechanism is more than or equal to 200 n.mm, the rotating speed of the welding mechanism is 500-3000r/min, the welding speed of the welding mechanism is 80-1000mm/min, the single-layer additive thickness is 0.5-5mm, the feeding speed of the first feeding mechanism and the second feeding mechanism is 50-1000mm/min, and the feeding speed of the feeding mechanism is 50-500mm/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111616078.2A CN114393292B (en) | 2021-12-27 | 2021-12-27 | Friction stir welding additive manufacturing device and method capable of continuously feeding rod |
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| CN202111616078.2A CN114393292B (en) | 2021-12-27 | 2021-12-27 | Friction stir welding additive manufacturing device and method capable of continuously feeding rod |
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| JP3400993B2 (en) * | 2001-08-27 | 2003-04-28 | 川崎重工業株式会社 | Friction stir welding equipment |
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