CN114905135A - Vibration material disk push system and vibration material disk equipment - Google Patents
Vibration material disk push system and vibration material disk equipment Download PDFInfo
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- CN114905135A CN114905135A CN202110184581.9A CN202110184581A CN114905135A CN 114905135 A CN114905135 A CN 114905135A CN 202110184581 A CN202110184581 A CN 202110184581A CN 114905135 A CN114905135 A CN 114905135A
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- push rod
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- linear driving
- driving structure
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- 239000000463 material Substances 0.000 title claims abstract description 85
- 239000000654 additive Substances 0.000 claims abstract description 119
- 230000000996 additive effect Effects 0.000 claims abstract description 118
- 238000004519 manufacturing process Methods 0.000 claims abstract description 26
- 238000003756 stirring Methods 0.000 claims abstract description 26
- 238000003466 welding Methods 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 9
- 238000005452 bending Methods 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 230000008713 feedback mechanism Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
- B65G47/82—Rotary or reciprocating members for direct action on articles or materials, e.g. pushers, rakes, shovels
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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
Abstract
The invention relates to the technical field of friction stir welding, in particular to a material increase pushing system and material increase manufacturing equipment. The additive material pushing system comprises a push rod and a first linear driving structure, wherein the starting end of the push rod is connected with the first linear driving structure, and the tail end of the push rod is suitable for being inserted into an additive material channel of a friction stir welding tool under the driving of the first linear driving structure so as to push additive materials and realize additive material conveying; the device also comprises a push rod supporting structure movably sleeved on the push rod, wherein the push rod supporting structure is suitable for moving relative to the push rod in the axial direction of the push rod so as to avoid the shake and bending of the push rod in the process of propelling material increase and prevent the push rod from being broken so as to ensure the accurate and stable conveying of the rod material.
Description
Technical Field
The invention relates to the technical field of friction stir welding, in particular to an additive pushing system and additive manufacturing equipment.
Background
The industrial development promotes the high-speed advance of machining industry, but the traditional technologies such as turning, milling, planing and grinding are not enough to meet the industrial requirements, and the additive manufacturing mode is started to be generated. Stirring friction material increase manufacturing is used as a solid phase material increase technology, heat is generated through friction of a stirring head, the material increase material reaches a plasticizing state, manufacturing of complex parts can be achieved rapidly, and the method has great engineering significance.
The rod material is a conventional friction stir additive material, and in the friction stir additive manufacturing process, the rod material is placed in the additive channel and rotates with the stirring head to perform additive manufacturing. In order to continuously perform additive manufacturing, a conveying mechanism is required to continuously convey the bars, and related structures for conveying the bars in the stirring friction additive manufacturing process are not provided temporarily in the prior art, so that the bars are accurately and stably conveyed.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the problem of stable transportation of bars in the friction stir additive manufacturing process in the prior art, so as to provide an additive pushing system and an additive manufacturing apparatus.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the invention provides an additive material pushing system which comprises a push rod and a first linear driving structure, wherein the starting end of the push rod is connected with the first linear driving structure, and the tail end of the push rod is suitable for being inserted into an additive material channel of a friction stir welding tool to push additive materials under the driving of the first linear driving structure; and the push rod assisting structure is movably sleeved on the push rod and is suitable for moving relative to the push rod in the axial direction of the push rod.
In the additive material pushing system, the push rod assisting structure comprises a bearing, and the bearing is sleeved on the push rod; and the bearing is fixed at the movable end of the second linear driving structure through a bearing seat.
In the additive material pushing system, the device further comprises a vertical plate, and the first linear driving structure and the second linear driving structure are fixed on the vertical plate.
In the additive material pushing system, the first linear driving structure is an electric cylinder, and the starting end of the push rod is connected with the movable end of the electric cylinder; the second linear driving structure comprises a supporting motor, a screw rod and a sliding seat, the screw rod is connected with the driving end of the supporting motor, and the sliding seat is in sliding fit with the screw rod.
In the additive material pushing system, along with the pushing of the push rod, the bearing is always located in the middle of the push rod outside the additive material channel under the driving of the second linear driving structure.
In the additive material pushing system, during the additive material pushing process, the bearing and the push rod complete respective strokes in the same time. In the additive material pushing system, a pressure sensor, an end face bearing and an end cover bearing are sequentially arranged at the movable end of the electric cylinder, the end face bearing is fixedly arranged at the bottom of the pressure sensor, and the end cover bearing is rotatably assembled at the bottom of the end face bearing; the end cover bearing is an end cover bearing with a seat, and the initial end of the push rod is inserted into the seat of the end cover bearing.
The additive material pushing system further comprises a horizontal moving base and a rack, wherein the horizontal moving base is connected to the rack in a sliding mode through a guide rail; driven by a horizontal motor on the rack, the horizontal moving base drives the push rod and the first linear driving structure to move horizontally.
In the additive material pushing system, the push rod is a cylindrical push rod.
The invention also provides additive manufacturing equipment which comprises a workbench, a friction stir welding tool, a main shaft system and the additive propulsion system, wherein additive channels are arranged in the friction stir welding tool and the main shaft system, and are quadrangular prism channels; the tail end of a push rod of the additive material pushing system is suitable for being inserted into an additive material channel of the friction stir welding tool under the driving of the first linear driving structure so as to push additive materials.
The technical scheme of the invention has the following advantages:
1. the additive material pushing system comprises a push rod and a first linear driving structure, wherein the starting end of the push rod is connected with the first linear driving structure, and the tail end of the push rod is suitable for being inserted into an additive material channel of a friction stir welding tool under the driving of the first linear driving structure so as to push additive materials and realize additive material conveying; the device also comprises a push rod supporting structure movably sleeved on the push rod, wherein the push rod supporting structure is suitable for moving relative to the push rod in the axial direction of the push rod so as to avoid the shake and bending of the push rod in the process of propelling material increase and prevent the push rod from being broken so as to ensure the accurate and stable conveying of the rod material.
2. According to the material increase pushing system provided by the invention, along with the pushing of the push rod, the bearing is always positioned in the middle of the push rod outside the material increase channel under the driving of the second linear driving structure, so that the bending of the push rod is further avoided.
3. According to the additive pushing system provided by the invention, the movable end of the electric cylinder is sequentially provided with the pressure sensor, the end face bearing and the end cover bearing, wherein the end cover bearing is an end cover bearing with a seat and is used for accommodating and rotating along with the push rod, and the end face bearing plays a role in assembling and supporting the end cover bearing so as to ensure that enough thrust is provided for the push rod and prevent the movable end of the electric cylinder from rotating along with the push rod, so that the stability of the electric cylinder is ensured.
4. The additive material pushing system further comprises a horizontal moving base, wherein the horizontal moving base drives the push rod and the first linear driving structure to move horizontally, so that the push rod can avoid an inlet of the additive material channel when the additive material is assembled in the additive material channel, and the push rod is driven to reset to the inlet of the additive material channel after the additive material is assembled, so that the smooth operation of the whole additive material assembling process is facilitated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of an additive manufacturing apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an additive push system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a horizontal movement system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a pressure sensor system according to an embodiment of the present invention;
fig. 5 is a first schematic view of an assist structure according to an embodiment of the present invention;
fig. 6 is a second schematic view of an assisting structure according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a spindle system according to an embodiment of the present invention.
Description of the reference numerals:
10-an additive push system; 11-a servo motor; 12-a cylinder rod; 20-a pressure sensor system; 21-a pressure sensor; 22-end face bearing; 23-end cap bearings; 30-a supporting structure; 31-assist motor; 32-a bearing seat; 33-a bearing; 34-a vertical plate; 40-a spindle system; 41-additive channel inlet; 42-a main shaft; 43-a knife handle; 44-a belt; 45-a drive shaft; 50-a stirring head; 60-a workbench; 70-horizontally moving the base; 71-a frame; 72-a horizontal motor; 80-a push rod; 90-numerical control system; 100-air conditioning system.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
As shown in fig. 1, the present embodiment provides an additive manufacturing apparatus, which includes a spindle system 40, a stirring head 50, and a workbench 60, wherein during operation, the spindle system 40 drives the stirring head 50 to rotate, so as to implement additive manufacturing on the workbench 60; as shown in fig. 7, the spindle system 40 includes a spindle 42 that is driven to rotate by a drive shaft 45 of a spindle motor (not shown) through a belt 44 or a gear, and a tool shank 43 attached to the spindle; a mixing head 50 is mounted at the working end of the tool shank 43, wherein the spindle 42, the tool shank 43 and the mixing head 50 can be mounted in a known manner, and the spindle 42, the tool shank 43 and the mixing head 50 have mutually communicated additive channels therein, and the additive channels have additive channel inlets 41.
When additive manufacturing is required, the additive manufacturing apparatus provided in this embodiment inserts a rod material to be additively manufactured, for example, an aluminum rod, into the additive channel from the additive channel inlet 41, and advances downward to perform additive manufacturing under the action of an additive propulsion system described below, and can prevent the additive propulsion system from rotating with the rod material.
The vibration material disk equipment that this embodiment provided, the main shaft system, for belt or gear drive structure, it is rotatory to drive the main shaft through the motor, for avoiding structures such as main shaft bearing to need to rotate at a high speed and the effect of below high temperature to ablate down, the main shaft need dispose cooling system, and this cooling system can be water-cooling structure, through water-cooling machine cooling liquid to the main shaft cooling. The spindle can be cooled by oil cooling, and the water cooling machine is replaced by a hydraulic system to cool the spindle. In addition, the additive manufacturing apparatus provided in this embodiment may further include a counter system 90 and an air conditioning system 100.
As shown in fig. 2 to 6, the additive manufacturing apparatus provided in this embodiment further includes an additive propulsion system 10, where the additive propulsion system 10 further includes a push rod 80 and a first linear driving structure, a start end of the push rod 80 is connected to the first linear driving structure, and a tail end of the push rod 80 is adapted to be driven by the first linear driving structure and inserted into an additive channel of a friction stir welding tool to push additive material; the starting end of the push rod refers to the top end of the push rod 80 shown in fig. 5, and the tail end of the push rod refers to the bottom end of the push rod 80 shown in fig. 5. Specifically, the first linear driving structure may be provided as an electric cylinder, as shown in fig. 2, the electric cylinder includes a servo motor 11 and an electric cylinder rod 12, and the electric cylinder rod 12 is connected with the start end of the push rod 80 as the movable end of the electric cylinder.
The push rod 80 is preferably a cylindrical push rod made of an ejector pin material, and because the push rod 80 rotates along with the rotation of the main shaft in the material increase channel, the cylindrical push rod can avoid centrifugal force generated by the push rod in the rotating process to a certain extent, but the cylindrical material used in industry has certain error, so that the shaking phenomenon can be avoided in the rotating process, the push rod needs to bear large pressure in the propelling process, and the push rod is bent or broken when being pressurized in shaking. As shown in fig. 5 and 6, the additive manufacturing apparatus provided in this embodiment further includes a push rod supporting structure 30 movably sleeved on the push rod 80, where the push rod supporting structure 30 is adapted to move relative to the push rod in the axial direction of the push rod, so as to avoid shaking and bending of the push rod during the additive manufacturing process, and prevent the push rod from being broken, so as to ensure accurate and stable conveying of the rod material.
As shown in fig. 5 and 6, in the additive material pushing system, the push rod assisting structure 30 includes a bearing 33 and a second linear driving structure, the bearing 33 is sleeved on the push rod 80, and the bearing 33 is fixed at a movable end of the second linear driving structure through a bearing seat 32. Specifically, the second linear driving structure comprises a supporting motor 31, a screw rod and a sliding seat, the screw rod is connected with the driving end of the supporting motor 31, and the sliding seat is in sliding fit with the screw rod; wherein the bearing block 32 is connected to the screw by means of a slide. The pushing system is responsible for pushing the raw material bar into the main shaft while avoiding the system to rotate with the bar. The part consists of a servo motor and an electric cylinder rod, wherein the servo motor rotates, and the rotating force is converted into the pushing force of the downward movement of the electric cylinder rod through a screw rod mechanism.
The first linear driving structure provides a larger downward pressure to the push rod 80, the push rod inevitably bends, and the starting end of the push rod 80 is fixedly connected with the first linear driving structure, and the tail end of the push rod 80 is inserted into the additive material channel, so that the tail end of the push rod is axially fixed, and the two ends of the push rod are fixed, so that the position of the push rod bent by force is generally generated at the middle position of a distance from the outer side of the additive material channel to the starting end of the additive material channel. Therefore, preferably, in the additive material pushing system, as the push rod 80 is pushed, the bearing 33 is always located in the middle of the push rod outside the additive material channel under the driving of the second linear driving structure, so that bending of the push rod is further avoided. In order to meet the requirement that the bearing 33 can be always located in the middle of the outer side of the additive channel in the additive manufacturing process, the downward moving speed of the bearing can be selected to be half of the pushing speed of the push rod. In addition, as an alternative embodiment, the support motor 31 for powering the bearing may be in communication with the servo motor 11 for powering the push rod; according to the signal of the servo motor 11, the help motor 31 can adjust the rotating speed in real time, and in the additive material advancing process, the bearing and the push rod complete respective strokes in the same time so as to ensure that the bearing is always positioned in the middle of the push rod outside the additive material channel.
Optionally, the additive material pushing system further includes a vertical plate 34, and the first linear driving structure and the second linear driving structure are fixed on the vertical plate 34.
Optionally, in the additive material pushing system, a pressure sensor system 20 is disposed at a movable end of the electric cylinder, the pressure sensor system 20 includes a pressure sensor 21, an end face bearing 22 and an end cap bearing 23, which are disposed in sequence, the end face bearing 22 is fixedly disposed at a bottom of the pressure sensor 21, and the end cap bearing 23 is rotatably mounted at a bottom of the end face bearing 22; the end cover bearing 23 is an end cover bearing with a seat, the starting end of the push rod 80 is inserted into the axle seat of the end cover bearing, and the end face bearing plays a role in assembling and supporting the end cover bearing so as to ensure that enough thrust is provided for the push rod and prevent the movable end of the electric cylinder from rotating along with the rotation of the movable end of the electric cylinder, thereby ensuring the stability of the electric cylinder. The pressure sensor senses the pressure applied by the push rod to the raw material and realizes the closed-loop control of the pressure through the PID regulation of the PLC. The pressure system is added with a feedback mechanism through the pressure sensor, the material increase pressure is ensured through the torque judgment of the servo motor and the double feedback mechanism of the pressure sensor, and the pressure accuracy is ensured by adopting the pressure sensor to establish the pressure feedback mechanism.
As shown in fig. 3, the additive material pushing system further includes a horizontal moving base 70 and a frame 71, where the horizontal moving base 70 is slidably connected to the frame 71 through a guide rail; the additive propulsion system 10 is fixed on the horizontal moving base 70, and driven by the horizontal motor 72 on the rack 71, the horizontal moving base 70 drives the push rod 80 and the first linear driving structure to move horizontally. The horizontal moving base drives the push rod and the first linear driving structure to move horizontally, so that the push rod can avoid an inlet of the additive channel when the additive material is assembled in the additive channel, and the push rod is driven to reset to the inlet of the additive channel after the additive material is assembled, so that the whole additive material assembling process can be operated smoothly.
When the additive manufacturing equipment provided by the embodiment is used, additive raw materials are put into an additive channel inlet below the push rod, the main shaft rotates and moves along the Z-axis direction, and the stirring head stops moving at a position 0.1-5mm away from the base plate; in particular, the position may be reached first and then rotated.
The push rod pushes the material to move downwards and apply pressure, the main shaft moves according to the original path, and the material is deposited on the substrate at the moment. Along with the main shaft, the raw materials are continuously consumed and shortened, the push rod continuously moves downwards, and the help mechanism moves along with the downward movement of the push rod at the moment, so that the help mechanism is always positioned at the center of the push rod. In particular, the device can be changed into displacement control without using a pressure sensor, namely the push rod moves downwards 0.1-100mm per minute.
In the additive material manufacturing apparatus provided by this embodiment, the additive material channel provided in the friction stir welding tool and the spindle system may be selected as a quadrangular prism channel; the tail end of a push rod of the additive material pushing system is suitable for being inserted into an additive material channel of the friction stir welding tool under the driving of the first linear driving structure so as to push additive materials.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications derived therefrom are intended to be within the scope of the invention.
Claims (10)
1. An additive material pushing system is characterized by comprising,
the starting end of the push rod is connected with the first linear driving structure, and the tail end of the push rod is suitable for being inserted into an additive material channel of the friction stir welding tool to push additive materials under the driving of the first linear driving structure;
and the push rod assisting structure is movably sleeved on the push rod and is suitable for moving relative to the push rod in the axial direction of the push rod.
2. The additive pushing system of claim 1, wherein the push rod assist structure comprises,
the bearing is sleeved on the push rod;
and the bearing is fixed at the movable end of the second linear driving structure through a bearing seat.
3. The additive push system of claim 2 further comprising a riser, the first and second linear drive structures being fixed to the riser.
4. The additive push system of claim 2,
the first linear driving structure is an electric cylinder, and the starting end of the push rod is connected with the movable end of the electric cylinder;
the second linear driving structure comprises a supporting motor, a screw rod and a sliding seat, wherein the screw rod is connected with the driving end of the supporting motor, and the sliding seat is in sliding fit with the screw rod.
5. The additive pushing system according to any one of claims 2 to 4, wherein the bearing is always located in the middle of the push rod outside the additive channel under the driving of the second linear driving structure as the push rod is pushed.
6. The additive push system of claim 5 wherein the bearing and the push rod complete their respective strokes in the same time during additive propulsion.
7. The additive pushing system according to claim 4, wherein a pressure sensor, an end face bearing and an end cap bearing are sequentially arranged at a movable end of the electric cylinder, the end face bearing is fixedly arranged at the bottom of the pressure sensor, and the end cap bearing is rotatably assembled at the bottom of the end face bearing; the end cover bearing is an end cover bearing with a seat, and the initial end of the push rod is inserted into the seat of the end cover bearing.
8. The additive propulsion system of claim 1 further comprising a horizontally moving base and a frame, the horizontally moving base slidably connected to the frame by a guide rail; driven by a horizontal motor on the rack, the horizontal moving base drives the push rod and the first linear driving structure to move horizontally.
9. The additive propulsion system of claim 1 wherein the pushrod is a cylindrical pushrod.
10. An additive manufacturing apparatus comprising a table, a friction stir welding tool and spindle system, and the additive propulsion system of any of claims 1-9, the friction stir welding tool and spindle system having additive channels therein, the additive channels being quadrangular prism channels; the tail end of a push rod of the additive material pushing system is suitable for being inserted into an additive material channel of the friction stir welding tool under the driving of the first linear driving structure so as to push additive materials.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110184581.9A CN114905135A (en) | 2021-02-08 | 2021-02-08 | Vibration material disk push system and vibration material disk equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110184581.9A CN114905135A (en) | 2021-02-08 | 2021-02-08 | Vibration material disk push system and vibration material disk equipment |
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| CN114905135A true CN114905135A (en) | 2022-08-16 |
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| CN202110184581.9A Pending CN114905135A (en) | 2021-02-08 | 2021-02-08 | Vibration material disk push system and vibration material disk equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117340284A (en) * | 2023-10-20 | 2024-01-05 | 北京科技大学 | Portable friction stir deposition additive manufacturing device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117340284A (en) * | 2023-10-20 | 2024-01-05 | 北京科技大学 | Portable friction stir deposition additive manufacturing device |
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