CN110026557B - Direct-writing device for remelting mixed solid particles and forming method - Google Patents
Direct-writing device for remelting mixed solid particles and forming method Download PDFInfo
- Publication number
- CN110026557B CN110026557B CN201910453783.1A CN201910453783A CN110026557B CN 110026557 B CN110026557 B CN 110026557B CN 201910453783 A CN201910453783 A CN 201910453783A CN 110026557 B CN110026557 B CN 110026557B
- Authority
- CN
- China
- Prior art keywords
- pulping
- extrusion
- solid particles
- piston rod
- remelting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
Abstract
The invention relates to the technical field of additive manufacturing, and discloses a direct-writing device for remelting mixed solid particles and a forming method, wherein the device comprises a feeding system, a pulping system and an extrusion system, wherein the feeding system is configured to store at least two types of solid particles; the pulping system comprises a pulping device and a plurality of pulping material cylinders, wherein the pulping device can extend into the pulping material cylinders so as to enable solid particles in the pulping material cylinders to form semi-solid slurry; the extrusion system can extend into the pulping material cylinder to extrude the semi-solid slurry; the feeding system, the pulping device and the extrusion system are configured to simultaneously correspond to the pulping material cylinders so as to sequentially perform feeding, pulping and extrusion actions on the pulping material cylinders. The formed part prepared by the forming method has uniform tissue and high forming precision.
Description
Technical Field
The invention relates to the technical field of metal additive manufacturing, in particular to a direct-writing device for remelting mixed solid particles and a forming method.
Background
Additive manufacturing technology is a technology for molding parts by using a bondable material such as powdered or filiform metal or plastic and the like in a layer-by-layer printing mode on the basis of a digital model file. The metal additive manufacturing process based on the high-energy beam generally takes the high-energy beam as a heat source, and the printing equipment has a complex structure and high equipment and material cost; meanwhile, the formed part has larger temperature gradient in the high-energy beam scanning forming process, and is easy to cause defects and larger internal stress to tissues.
Patent No. CN106925783A discloses a high-efficiency metal 3D printing device and method, which combines the preparation process of liquid metal slurry with the additive manufacturing and forming process, and adopts the scheme that metal melt is directly fed, so that the metal melt is continuously sprayed in a liquid flow form for printing, a cooling medium is utilized for rapid cooling, and the printing process is completed through the movement of a printing head and a forming substrate. However, during the forming process, the direct change of the metal from the liquid state to the solid state generates larger solidification shrinkage, so that the formed part has low dimensional precision, the structure cannot be well controlled, and the formed part generates larger internal stress.
Patent No. CN106623840A discloses an alloy semisolid spinning additive manufacturing device, which combines the process of preparing semisolid slurry and the additive manufacturing forming process, omits slurry transfer and directly realizes the forming process on a forming substrate. The method is characterized in that molten metal is injected into a pulping device, semi-solid slurry is obtained through chilling nucleation, and the slurry is stacked on a forming platform moving according to a preset program layer by layer through a spinning pipe, so that semi-solid spinning additive preparation is realized. Although the method consciously adopts the process of manufacturing nucleation by the spinning tube, the preparation of the semi-solid slurry requires a large amount of uniform nucleation cores, and the heat preservation temperature and the heat preservation time need to be accurately controlled to realize the control of the growth behavior of primary particles, and the high-viscosity semi-solid slurry with controllable flow behavior is difficult to prepare only by the chilling action of the smooth region of the spinning tube. And semi-solid spinning vibration material disk equipment passes through solitary slurrying device slurrying to pile up the thick liquids to the shaping platform layer by layer through the spinning pipe, the device production efficiency is low, is not suitable for large-scale production.
Based on the problems, the direct-writing device for remelting the mixed solid particles is simple in structure, small in internal stress of the formed part, small in solidification shrinkage, high in production efficiency and suitable for large-scale production, and the forming quality of the formed part is improved.
Disclosure of Invention
The invention aims to provide a direct-writing device and a forming method for remelting mixed solid particles, which have the advantages of small internal stress and small solidification shrinkage of a formed part and improve the forming quality of the formed part.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a direct-writing device for remelting mixed solid particles, which comprises:
a feed system configured to store at least two solid particles;
the pulping system comprises a pulping device and a plurality of pulping material cylinders, each pulping material cylinder is provided with a heating device, and the pulping device is configured to extend into the pulping material cylinder so that the solid particles in the pulping material cylinder form semi-solid slurry;
an extrusion system configured to extend into the pulping barrel to extrude a semi-solid slurry formed within the pulping barrel;
the feeding system, the pulping device and the extruding system are configured to simultaneously correspond to the pulping material cylinders so as to sequentially feed, pulp and extrude the pulping material cylinders.
The device has the advantages that the device is simple in structure, reduces cost, can enable the structure of the formed part to be uniform, reduces structural defects and internal stress, improves the mechanical property of the formed part, and obviously improves the quality of the formed part;
the pulping material barrels are arranged in a plurality of modes, and the feeding system, the pulping device and the extrusion system can simultaneously correspond to the pulping material barrels so as to sequentially perform feeding, pulping and extrusion actions on the pulping material barrels, save the working time, improve the working efficiency and be suitable for large-scale production.
As a preferable scheme of the direct-writing device for remelting the mixed solid particles, the pulping system further comprises a rotary workbench, and the feeding system, the pulping device and the extrusion system are all arranged on the rotary workbench and are circularly arranged around the rotation center of the rotary workbench;
the pulping material cylinders are arranged below the rotary workbench, the pulping material cylinders are arranged along the circle, and the rotary workbench rotates to drive the feeding system, the pulping device and the extrusion system to rotate. The rotary worktable can drive the feeding system, the pulping device and the extrusion system to rotate, different processes are realized on different stations, the circulation of the three processes of feeding, pulping and extrusion is realized, and further the continuous production is realized.
As a preferable scheme of the direct-writing device for remelting mixed solid particles, the pulping device comprises a first driving device and a pulping piston rod, and the first driving device drives the pulping piston rod to rotate and can move along the axial direction of the pulping material barrel. Solid particles in the pulping material cylinder can form semi-solid slurry by driving the pulping piston rod through the first driving device, and the control is convenient.
As a preferable scheme of the direct-writing device for remelting the mixed solid particles, the bottom end of the pulping piston rod is provided with a shearing part. The arrangement of the shearing component can provide shearing force and extrusion force in the pulping process of the pulping piston rod, so that the components of the semi-solid slurry are more uniform.
As a preferable mode of the direct-writing apparatus for remelting mixed solid particles, the shearing member includes a plurality of pins, and the plurality of pins are circumferentially arranged along the end face and/or the side face of the bottom end of the pulping piston rod. This arrangement can enhance the shearing and squeezing action.
As a preferable mode of the direct-writing apparatus for remelting mixed solid particles, the pulping apparatus further includes a first pressure detection device, a first displacement detection device, and a torque detection device, the first pressure detection device is configured to detect the pressure of the pulping piston rod, the first displacement detection device is configured to detect the displacement of the pulping piston rod, and the torque detection device is configured to detect the torque of the pulping piston rod. Can detect the pressure of slurrying piston rod through first pressure measurement, detect the displacement of slurrying piston rod through first displacement detection device, detect the moment of torsion of slurrying piston rod through moment of torsion detection device to in the detection slurrying feed cylinder semisolid slurry viscosity state under the effect of slurrying piston rod.
As a preferable scheme of the direct-writing device for remelting mixed solid particles, the extrusion system includes a second driving device, an extrusion piston rod, and a plurality of extrusion heads disposed on each pulping cylinder, and the second driving device drives the extrusion piston rod to move along an axial direction of the pulping cylinder, so as to extrude the semisolid slurry from the extrusion heads. The extrusion piston rod is driven to move through the second driving device, the formed semi-solid slurry can be extruded, and the extruded semi-solid slurry can be shaped through the extrusion head.
As a preferable mode of the direct-writing apparatus for remelting mixed solid particles described above, the extrusion system further includes a second pressure detection device configured to detect the pressure of the extrusion piston rod, and a second displacement detection device configured to detect the displacement of the extrusion piston rod.
As a preferable mode of the direct-writing apparatus for remelting mixed solid particles, a temperature measurement system is further included, and the temperature measurement system includes a plurality of temperature detection devices configured to detect the temperature of each of the pulping barrels and each of the extrusion heads. The temperature detection devices can detect the temperatures of the pulping material cylinder and the extrusion head so as to control the preparation and extrusion of the semi-solid slurry.
The invention also provides a forming method for remelting the mixed solid particles, which adopts the direct-writing device for remelting the mixed solid particles and comprises the following steps:
s1, adding at least two solid particles which are uniformly mixed into a feeding system;
s2, conveying the solid particles in the feeding system to the pulping cylinder;
and S3, forming the solid particles in the pulping material cylinder into semi-solid slurry by controlling the heating condition of the heating device and the pulping condition of the pulping device, and extruding the semi-solid slurry by controlling the extrusion condition of the extrusion system.
The forming method of the mixed solid particle remelting is characterized in that at least two kinds of solid particles which are uniformly mixed are added into a feeding system, and the solid particles in the feeding system are conveyed into a pulping charging barrel; the semi-solid slurry is extruded by controlling the extrusion condition of the extrusion system, so that the flowing behavior of the semi-solid slurry is effectively controlled, the semi-solid slurry has small shrinkage in the deposition and solidification processes, the forming precision is high, the formed part has uniform tissue, the tissue defect and the internal stress are reduced, the mechanical property of the formed part is improved, and the quality of the formed part is obviously improved.
The invention has the beneficial effects that:
the direct-writing device for remelting the mixed solid particles stores at least two kinds of uniformly mixed solid particles through the feeding system and provides the solid particles for the pulping system, the pulping system can extend into the pulping material cylinder so that the solid particles in the pulping material cylinder form semi-solid slurry, and the semi-solid slurry formed in the pulping material cylinder is extruded out through the extruding system;
the pulping material barrels are arranged in a plurality of modes, and the feeding system, the pulping device and the extrusion system can simultaneously correspond to the pulping material barrels so as to sequentially perform feeding, pulping and extrusion actions on the pulping material barrels, save the working time, improve the working efficiency and be suitable for large-scale production.
The invention provides a solid particle remelting forming method, which is characterized in that at least two kinds of solid particles which are uniformly mixed are added into a feeding system, and the solid particles in the feeding system are conveyed into a pulping charging barrel; the semi-solid slurry is extruded by controlling the extrusion condition of the extrusion system, so that the flowing behavior of the semi-solid slurry is effectively controlled, the semi-solid slurry has small shrinkage in the deposition and solidification processes, the forming precision is high, the formed part has uniform tissue, the tissue defect and the internal stress are reduced, the mechanical property of the formed part is improved, and the quality of the formed part is obviously improved.
Drawings
FIG. 1 is a schematic structural view of a direct-write apparatus for remelting mixed solid particles according to the present invention;
FIG. 2 is a schematic structural diagram of a feeding system, a pulping system and a three-dimensional moving system provided by the invention;
FIG. 3 is a schematic diagram of the feed system, pulping system and extrusion system provided by the present invention;
FIG. 4 is a ready-to-assemble view of the feed system, slurrying system, and extrusion system of FIG. 3 of the present invention;
FIG. 5 is a schematic structural diagram of a piston rod for pulping provided by the invention showing a shearing component;
FIG. 6 is a schematic structural diagram of a feeding system, a pulping piston rod and an extruding piston rod of the direct-writing device for remelting mixed solid particles, which are provided by the invention, respectively corresponding to a third pulping material cylinder, a first pulping material cylinder and a second pulping material cylinder;
fig. 7 is a schematic structural diagram of a feeding system, a pulping piston rod and an extrusion piston rod of the direct-writing device for remelting mixed solid particles, which are provided by the invention, respectively corresponding to a second pulping material cylinder, a third pulping material cylinder and a first pulping material cylinder.
In the figure:
1. a feed system;
2. a pulping system; 21. a pulping device; 23. rotating the working table; 212. a piston rod is made into slurry; 221. a first pulping barrel; 222. a second pulping cylinder; 223. a third pulping material cylinder; 2121. a shearing member;
3. an extrusion system; 32. extruding a piston rod; 33. an extrusion head;
4. a three-dimensional moving system;
5. an atmosphere protecting device; 51. sealing the box body; 52. a gas supply device; 53. a purification system; 511. a first transition bin; 512. a second transition bin;
6. a control system;
7. a heating device.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. 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, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The invention provides a direct-writing device for remelting mixed solid particles, which comprises a feeding system 1, a pulping system 2 and an extrusion system 3, wherein the feeding system 1 is configured to store at least two solid particles which are uniformly mixed; the pulping system 2 comprises a pulping device 21 and a plurality of pulping material cylinders, wherein the pulping device 21 can extend into the pulping material cylinders so that solid particles in the pulping material cylinders form semi-solid slurry; the extrusion system 3 can extend into the pulping material cylinder to extrude the semi-solid slurry formed in the pulping material cylinder; the feeding system 1, the slurrying system 2 and the extrusion system 3 are configured to be able to correspond to each slurrying cylinder at the same time to sequentially perform feeding, slurrying and extrusion actions for each slurrying cylinder.
The solid particles are preferably metal particles, and the mixed solid particles are rapidly melted by utilizing the difference of melting points to form a solid-liquid two-phase metal melt suspending the high-melting-point solid-phase metal particles, namely semi-solid slurry, which is composed of special structures and fluid properties of the semi-solid slurry, wherein the semi-solid slurry has a large number of nucleation cores, the structure of the formed part is uniform, the tissue defects and internal stress are reduced, the mechanical property of the formed part is improved, the quality of the formed part is remarkably improved, and meanwhile, the shrinkage of the semi-solid slurry in the deposition and solidification processes is small, and the forming precision is high. The pulping material cylinders are arranged in a plurality of numbers, the feeding system 1, the pulping device 21 and the extrusion system 3 can simultaneously correspond to the pulping material cylinders so as to sequentially perform feeding, pulping and extrusion actions on the pulping material cylinders, thereby saving the working time, improving the working efficiency and being suitable for large-scale production.
Preferably, the direct-writing device for remelting mixed solid particles further comprises a three-dimensional moving system 4, wherein the three-dimensional moving system 4 is arranged below the extrusion system 3, so that the semi-solid slurry extruded by the extrusion system 3 is formed on a platform of the three-dimensional moving system 4, and the three-dimensional moving system 4 is arranged to facilitate the preparation of complex formed parts. Preferably, the three-dimensional moving system 4 is provided with a heating component and a temperature measuring component, the platform of the three-dimensional moving system 4 can be heated through the heating component, so that the interlayer bonding property of the formed part is improved, the quality of the formed part is improved, and the temperature of the platform of the three-dimensional moving system 4 can be monitored in real time through the temperature measuring device, so that the control is facilitated. The specific three-dimensional moving system 4, the structure of the heating assembly and the heating manner belong to the prior art, and are not described herein again.
As shown in fig. 1, the feeding system 1 includes a feeding hopper for storing solid particles, and the lower portion of the feeding hopper has a funnel structure for facilitating the output of the solid particles under the action of gravity.
In order to enable the mixed solid particles in the pulping material cylinders to form semi-solid slurry, a heating device 7 is arranged on the outer side of each pulping material cylinder, and the solid particles in the pulping material cylinders can be heated by the heating devices 7 and melted into the semi-solid slurry. Preferably, the heating device 7 can be heated by electromagnetic induction or resistance heating, and high-energy beams are not needed to be used as a heat source, so that the cost is greatly reduced.
As shown in fig. 3, the pulping system 2 further comprises a rotary worktable 23, the feeding system 1, the pulping device 21 and the extrusion system 3 are all arranged on the rotary worktable 23, and the feeding system 1, the pulping device 21 and the extrusion system 3 are circularly arranged around the rotation center of the rotary worktable 23; a plurality of slurrying feed cylinders all set up in swivel work head 23 below, and a plurality of slurrying feed cylinders are along above-mentioned circular arranging, and swivel work head 23 rotates and drives feeding system 1, slurrying device 21 and extrusion system 3 and rotate, realizes different processes on the station of difference, has realized that the circulation of feed, slurrying, three process of extruding goes on, and then has realized continuous production. Preferably, the feed system 1, the slurrying device 21 and the extrusion system 3 are all connected to the rotary table 23 by flanges. In the present embodiment, the driving device rotates the rotary table 23 by belt drive, but in other embodiments, the belt drive is not limited thereto, and it is sufficient if the rotary table 23 can be rotated.
As shown in fig. 4, the pulping apparatus 21 comprises a first driving device and a pulping piston rod 212, wherein the first driving device drives the pulping piston rod 212 to rotate and can move along the axial direction of the pulping cylinder. The solid particles in the pulping material cylinder can form semi-solid slurry by driving the pulping piston rod 212 through the first driving device, and the control is convenient. Preferably, the first driving device is an electric cylinder, and the electric cylinder is connected with the pulping piston rod 212 through a worm gear and worm speed reducer, and drives the pulping piston rod 212 to rotate and move along the axial direction of the pulping cylinder.
Further, as shown in fig. 5, a shearing member 2121 is disposed at the bottom of the piston rod 212 for providing shearing force and extrusion force during the slurry making process of the piston rod 212, so that the components of the semi-solid slurry are more uniform. Preferably, the shearing part 2121 comprises a plurality of pins, and the plurality of pins are circumferentially arranged along the end face and/or the side face of the bottom end of the pulping piston rod 212, so that the shearing and extruding effects can be enhanced, solid particles in the pulping cylinder are rotationally sheared and extruded, and semi-solid slurry formed in the pulping cylinder is more uniform. In this embodiment, a plurality of circles of pins are arranged on the bottom end face of the grout producing piston rod 212, the circle centers of the plurality of circles of pins coincide, each circle of pins comprises a plurality of pins, and therefore more uniform shearing force and extrusion force can be provided for semi-solid-state grout preparation.
The pulping apparatus 21 further comprises first pressure detection means configured to detect a pressure of the pulping piston rod 212, first displacement detection means configured to detect a displacement of the pulping piston rod 212, and torque detection means configured to detect a torque of the pulping piston rod 212. The pressure of the pulping piston rod 212 can be detected through the first pressure detection device, the displacement of the pulping piston rod 212 is detected through the first displacement detection device, and the torque of the pulping piston rod 212 is detected through the torque detection device, so that the viscosity state of the semi-solid pulp in the pulping cylinder under the action of the pulping piston rod 212 can be detected. Preferably, in this embodiment, the first pressure detection device is a pressure sensor, the first displacement detection device is a displacement sensor, the torque detection device is a torque sensor, and the viscosity state of the semi-solid slurry in the pulping cylinder during pulping is represented by a numerical value fed back by the pressure sensor, the displacement sensor and the torque sensor, so that the preparation of the slurry is completed by controlling the shearing and extruding time. In the present embodiment, the first pressure detecting means, the first displacement detecting means, and the torque detecting means are all integrated in the first driving means, and in other embodiments, the first pressure detecting means, the first displacement detecting means, and the torque detecting means are not limited to the above-described installation positions as long as the pressure, the displacement, and the torque of the piston rod 212 can be detected.
As shown in fig. 2 and 3, the extrusion system 3 includes a second driving device, an extrusion piston rod 32, and a plurality of extrusion heads 33 disposed on each of the pulping barrels, and the second driving device drives the extrusion piston rod 32 to move in the axial direction of the pulping barrel to extrude the semisolid slurry from the extrusion heads 33. The extrusion piston rod 32 is driven by the second driving device to move, so that the formed semi-solid slurry can be extruded, and the extruded semi-solid slurry can be shaped by the extrusion head 33. Preferably, different shapes of semi-solid slurries are extruded by mounting different shapes of extrusion heads 33 on the slurrying cartridges. The extrusion system 3 further includes a second pressure detection device and a second displacement detection device, the second pressure detection device is configured to detect the pressure of the extrusion piston rod 32, and the second displacement detection device is configured to detect the displacement of the extrusion piston rod 32, preferably, the second pressure detection device and the second displacement detection device are respectively a pressure sensor and a displacement sensor, in this embodiment, both the second pressure detection device and the second displacement detection device are disposed on the second driving device, and are used for data acquisition during the extrusion process of the semi-solid slurry and performing feedback control, so as to facilitate the semi-solid extrusion of the semi-solid slurry.
Preferably, the mixed solid particle remelting direct-writing apparatus further includes a temperature measuring system including a plurality of temperature detecting devices configured to detect the temperature of each of the pulping barrels and each of the extrusion heads 33 so as to control the preparation and extrusion of the semi-solid slurry. Preferably, each temperature detecting device is a non-contact temperature detecting device capable of detecting the temperature of each pulping barrel and each extrusion head 33 in real time.
Preferably, the direct-writing device for remelting mixed solid particles further comprises an atmosphere protection device 5, wherein the atmosphere protection device 5 comprises a closed box body 51, a gas supply device 52 and a purification system 53, and the feeding system 1, the pulping system 2 and the three-dimensional moving system 4 are all arranged in the closed box body 51; the gas supply device 52 is communicated with the closed box body 51 and supplies protective gas to the closed box body 51; the purge system 53 is in communication with the enclosure 51, and is configured to cyclically purge the gas in the enclosure 51. This atmosphere protection device 5 can seal the forming process, provides protective gas in to the seal box through gas supply arrangement 52, protects the forming process, and clean system 53's setting realizes the gas circulation purification in the seal box 51, improves the cleanliness factor in the seal box 51, and then guarantees the shaping quality of formed part.
Further, a first transition bin 511 for adding solid particles and a second transition bin 512 for taking out molded parts molded on the platform of the three-dimensional moving system 4 are provided outside the closed box body 51. The first transition bin 511 can be used for conveniently adding solid particles into the feeding system 1, and the second transition bin 512 can be used for conveniently taking out formed parts, so that the operation is convenient.
The direct-writing device for remelting the mixed solid particles further comprises a control system 6, wherein the feeding system 1, the pulping system 2, the extruding system 3, the three-dimensional moving system 4, the heating device 7, the temperature measuring system and the atmosphere protection device 5 are all electrically connected with the control system 6, and the control system 6 is used for controlling the actions of all the systems and devices.
The device simple structure, the cost is reduced can make the formed part tissue even, reduces organizational defect and internal stress, improves the mechanical properties of formed part, is showing the quality that improves the formed part. In the present embodiment, the pulping system 2 is provided with three pulping cylinders, which are a first pulping cylinder 221, a second pulping cylinder 222 and a third pulping cylinder 223.
The invention also provides a forming method for remelting the mixed solid particles, which adopts the direct-writing device for remelting the mixed solid particles to prepare the solid particles and comprises the following steps:
s1, adding the at least two solid particles which are uniformly mixed into the feeding system 1;
s2, conveying the solid particles in the feeding system 1 into a pulping material cylinder;
and S3, forming the solid particles in the pulping material cylinder into semi-solid slurry by controlling the heating condition of the heating device 7 and the pulping condition of the pulping device 21, and extruding the semi-solid slurry by controlling the extrusion condition of the extrusion system 3.
The forming method of the mixed solid particle remelting is characterized in that at least two kinds of solid particles which are uniformly mixed are added into a feeding system 1, and the solid particles in the feeding system 1 are conveyed into a pulping material cylinder; the heating condition of the heating device 7 and the pulping condition of the pulping device 21 are controlled to enable solid particles in the pulping material cylinder to form semi-solid slurry, the extrusion condition of the extrusion system 3 is controlled to extrude the semi-solid slurry, and then the semi-solid slurry moves along a set route through the three-dimensional moving system 4 to be molded on a platform of the three-dimensional moving system 4, so that the structure of a molded part is uniform, the structure defect and the internal stress are reduced, the mechanical property of the molded part is improved, the quality of the molded part is obviously improved, meanwhile, the shrinkage of the semi-solid slurry in the deposition and solidification processes is small, and the molding precision is high.
Specifically, the heating conditions of the heating device 7 include a heating temperature and a heating time. The pulping conditions of the pulping apparatus 21 include a pressure parameter detected by the first pressure detecting means, a displacement parameter detected by the first displacement detecting means, and a torque parameter detected by the torque detecting means. The extrusion conditions of the extrusion system 3 include a pressure parameter detected by the first pressure detecting means and a displacement parameter detected by the second displacement detecting means.
Specifically, the control system 6 controls the opening/closing device 52 and the purge system 53 to cyclically purge the gas in the closed casing 51 so that the oxygen content of water in the closed casing 51 is maintained at 1ppm or less.
Then, at least two kinds of solid particles which are uniformly mixed are provided for the pulping material cylinder of the pulping system 2 through the first transition bin 511, the rotary table 23 is controlled to rotate through the control system 6 (the rotating direction is shown as an arrow in fig. 4), the feeding system 1, the pulping piston rod 212 and the extrusion piston rod 32 respectively correspond to the first pulping material cylinder 221, the second pulping material cylinder 222 and the third pulping material cylinder 223 (see fig. 4), the pulping piston rod 212 is controlled to extend into the second pulping material cylinder 222 by the first driving device, the extrusion piston rod 32 is controlled to extend into the third pulping material cylinder 223 by the second driving device, the heating device 7 is controlled to be started, and the first pulping material cylinder 221, the second pulping material cylinder 222, the third pulping material cylinder 223 and the pulping piston rod 212, the extrusion piston rod 32 and the extrusion head 33 inside are respectively preheated.
Controlling to start an electromagnetic valve of the pulping system 2 to enable the uniformly mixed solid particles to enter a first pulping material barrel 221; controlling to close the electromagnetic valve of the pulping system 2 and starting the heating device 7 at the outer side of the first pulping material barrel 221 to rapidly heat the first pulping material barrel 221; simultaneously controlling the pulping piston rod 212 and the extruding piston rod 32 to retreat and enabling the rotary workbench 23 to rotate, so that the feeding system 1, the pulping piston rod 212 and the extruding piston rod 32 respectively correspond to the third pulping material cylinder 223, the first pulping material cylinder 221 and the second pulping material cylinder 222 (see fig. 6); controlling to start the electromagnetic valve of the feeding system 1, so that the uniformly mixed solid particles enter the third pulping material cylinder 223, and simultaneously controlling the first driving device and the second driving device, so that the pulping piston rod 212 moves axially and circumferentially in the first pulping material cylinder 221, the solid particles in the first pulping material cylinder 221 are subjected to rotary shearing, extrusion and melting, simultaneously, the components of the semi-solid slurry in the first pulping material cylinder 221 are more uniform, and the extrusion piston rod 32 controlled by the second driving device enters the second pulping material cylinder 222 to be continuously preheated; controlling to close the electromagnetic valve of the feeding system 1 and start the heating device 7 at the outer side of the third pulping material barrel 223 to rapidly heat the third pulping material barrel 223; simultaneously controlling the pulping piston rod 212 and the extruding piston rod 32 to retreat and enabling the rotary worktable 23 to rotate, so that the feeding system 1, the pulping piston rod 212 and the extruding piston rod 32 respectively correspond to the second pulping material cylinder 222, the third pulping material cylinder 223 and the first pulping material cylinder 221 (see fig. 7); to this end, the semi-solid slurry in the first slurry barrel 221 is ready; controlling to start the electromagnetic valve of the feeding system 1, enabling the uniformly mixed solid particles to enter the second pulping material cylinder 222, simultaneously controlling the first driving device and the second driving device, enabling the pulping piston rod 212 to move axially and circumferentially in the third pulping material cylinder 223, rotationally shearing, extruding and melting the solid particles in the third pulping material cylinder 223, simultaneously enabling the components of the semi-solid slurry in the third pulping material cylinder 223 to be more uniform, and controlling the extruding piston rod 32 controlled by the second driving device to be matched with the three-dimensional moving system 4, the first pulping material cylinder 221, the electromagnetic valve and the extruding head 33 for three-dimensional extrusion forming; in the printing process, the electromagnetic valve of the feeding system 1 is controlled to be closed, and the heating device 7 at the outer side of the second pulping material cylinder 222 is controlled to be opened to rapidly heat the second pulping material cylinder 222; meanwhile, the first driving device controls the pulping piston rod 212 to retreat and preserve the semi-solid slurry in the third pulping cylinder 223; to this end, the semi-solid slurry in the third slurry barrel 223 is ready; after the semi-solid slurry in the first slurry making cylinder 221 is used up, the extrusion piston rod 32 is controlled to retract, so that the feeding system 1, the slurry making piston rod 212 and the extrusion piston rod 32 respectively correspond to the first slurry making cylinder 221, the second slurry making cylinder 222 and the third slurry making cylinder 223 (see fig. 4); the second driving device controls the extrusion piston rod 32 to be matched with the three-dimensional moving system 4, the third pulping material cylinder 223, the electromagnetic valve and the extrusion head 33 to carry out three-dimensional extrusion forming; in the printing process, the first pulping material cylinder 221 is filled with solid particles again, and the first driving device is controlled to enable the pulping piston rod 212 to move axially and circumferentially in the second pulping material cylinder 222, so that the solid particles in the second pulping material cylinder 222 are subjected to rotary shearing, extrusion and melting, and the components of the semi-solid slurry in the second pulping material cylinder 222 are more uniform, so that the semi-solid slurry in the second pulping material cylinder 222 is ready; after the semi-solid slurry in the third slurry making cylinder 223 is used up, the extrusion piston rod 32 is controlled to retract, so that the feeding system 1, the slurry making piston rod 212 and the extrusion piston rod 32 respectively correspond to the third slurry making cylinder 223, the first slurry making cylinder 221 and the second slurry making cylinder 222 (see fig. 6); controlling the extrusion piston rod 32 of the second driving device to cooperate with the three-dimensional moving system 4, the second pulping material cylinder 222, the electromagnetic valve and the extrusion head 33 to carry out three-dimensional extrusion forming; according to the working process, the high-efficiency automatic printing of the multi-station metal direct writing device can be realized.
In the circulating preparation and extrusion forming processes of the semi-solid metal slurry, the viscosity state of the semi-solid slurry in the pulping cylinder under the action of the pulping piston rod 212 is represented by numerical values fed back by the pressure sensor, the displacement sensor and the torque sensor on the first driving device, so that the preparation of the slurry can be completed by controlling the time of shearing and extrusion; the extrusion electric cylinder is used for data acquisition in the extrusion process of the slurry and is matched with the control system 6 to perform feedback control on the extrusion process through a pressure sensor and a displacement sensor of the extrusion electric cylinder; the real-time temperatures of the first pulping material cylinder 221, the second pulping material cylinder 222, the third pulping material cylinder 223 and the three extrusion heads 33 are respectively monitored through a temperature measuring system, and the heat supply of the heating device 7 is fed back and adjusted according to the monitoring result; dynamically controlling an inert gas supply device to cooperate with a purification system 53 through a numerical value fed back by a water oxygen detector in the atmosphere protection system 5, and circularly treating the gas in the closed box body 51 to ensure that the water and oxygen content in the closed box body 51 is maintained below 1 ppm; and the platform of the three-dimensional mobile system 4 is heated through the heating component and the temperature measuring component, and real-time temperature detection is carried out.
After the part forming process is completed, the pulping system 2 and the extrusion system 3 are controlled to stop, and the formed part is taken out through the second transition bin 512 on the left side of the closed box body 51.
In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are based on the orientations and positional relationships shown in the drawings and are used for convenience in description and simplicity in operation, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be constructed in a particular operation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. A direct-write apparatus for remelting mixed solid particles, comprising:
a feed system (1), the feed system (1) being configured to store at least two solid particles;
the pulping system (2) comprises a pulping device (21) and three pulping material cylinders, each pulping material cylinder is provided with a heating device (7), and the pulping device (21) can extend into the pulping material cylinder so that the solid particles in the pulping material cylinder form semi-solid slurry;
the extrusion system (3) can extend into the pulping cylinder to extrude the semi-solid slurry formed in the pulping cylinder;
the feeding system (1), the pulping device (21) and the extrusion system (3) are configured to simultaneously correspond to one pulping cylinder respectively so as to sequentially perform feeding, pulping and extrusion actions on each pulping cylinder.
2. The direct-writing mixed solid particle remelting device according to claim 1, wherein the slurrying system (2) further comprises a rotating table (23), and the feeding system (1), the slurrying device (21) and the extrusion system (3) are all arranged on the rotating table (23) and are circularly arranged around a rotation center of the rotating table (23);
the pulping material cylinders are arranged below the rotary workbench (23) and are circularly arranged, and the rotary workbench (23) rotates to drive the feeding system (1), the pulping device (21) and the extrusion system (3) to rotate.
3. The direct-write apparatus for remelting mixed solid particles according to claim 1, wherein the slurrying apparatus (21) comprises a first driving device and a slurrying piston rod (212), and the first driving device drives the slurrying piston rod (212) to rotate and can move along the axial direction of the slurrying cylinder.
4. The direct-write apparatus for remelting mixed solid particles according to claim 3, wherein the bottom end of the slurrying piston rod (212) is provided with a shearing member (2121).
5. The direct-write apparatus for remelting mixed solid particles according to claim 4, wherein the shearing member (2121) comprises a plurality of pins arranged circumferentially along an end face and/or a side face of the bottom end of the slurrying piston rod (212).
6. The direct-write apparatus for remelting mixed solid particles according to claim 3, wherein the slurrying apparatus (21) further comprises a first pressure detecting device configured to detect a pressure of the slurrying piston rod (212), a first displacement detecting device configured to detect a displacement of the slurrying piston rod (212), and a torque detecting device configured to detect a torque of the slurrying piston rod (212).
7. The direct-write apparatus for remelting mixed solid particles according to claim 1, wherein the extrusion system (3) comprises a second driving device, an extrusion piston rod (32), and a plurality of extrusion heads (33) disposed on each of the slurry cylinders, and the second driving device drives the extrusion piston rod (32) to move in the axial direction of the slurry cylinders to extrude the semisolid slurry from the extrusion heads (33).
8. The direct-write apparatus for remelting mixed solid particles according to claim 7, wherein the extrusion system (3) further comprises a second pressure detection device configured to detect the pressure of the extrusion piston rod (32) and a second displacement detection device configured to detect the displacement of the extrusion piston rod (32).
9. The direct-write apparatus for remelting mixed solid particles according to claim 7, further comprising a temperature measurement system comprising a plurality of temperature detection devices configured to detect the temperature of the pulping barrel and each of the extrusion heads (33).
10. A forming method by remelting mixed solid particles, using a direct-writing apparatus by remelting mixed solid particles according to any one of claims 1 to 9, comprising the steps of:
s1, adding the at least two solid particles which are uniformly mixed into the feeding system (1);
s2, conveying the solid particles in the feeding system (1) into the pulping cylinder;
s3, forming the solid particles in the pulping material cylinder into semi-solid slurry by controlling the heating condition of the heating device (7) and the pulping condition of the pulping device (21), and extruding the semi-solid slurry by controlling the extrusion condition of the extrusion system (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910453783.1A CN110026557B (en) | 2019-05-28 | 2019-05-28 | Direct-writing device for remelting mixed solid particles and forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910453783.1A CN110026557B (en) | 2019-05-28 | 2019-05-28 | Direct-writing device for remelting mixed solid particles and forming method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110026557A CN110026557A (en) | 2019-07-19 |
| CN110026557B true CN110026557B (en) | 2021-08-27 |
Family
ID=67243714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910453783.1A Active CN110026557B (en) | 2019-05-28 | 2019-05-28 | Direct-writing device for remelting mixed solid particles and forming method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110026557B (en) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6955532B2 (en) * | 2002-09-25 | 2005-10-18 | University Of Rochester | Method and apparatus for the manufacture of high temperature materials by combustion synthesis and semi-solid forming |
| KR101149379B1 (en) * | 2003-07-28 | 2012-06-28 | 얀센 파마슈티카 엔.브이. | Benzimidazole, benzthiazole and benzoxazole derivatives and their use as lta4h modulators |
| CN101070571B (en) * | 2006-05-12 | 2011-04-20 | 日精树脂工业株式会社 | Method for manufacturing composite material for carbon nano material and metal material |
| CN103521734B (en) * | 2013-10-14 | 2015-08-12 | 南昌大学 | Slip casting machine is got in a kind of rotary four station cleanings |
| US20150125334A1 (en) * | 2013-11-01 | 2015-05-07 | American Hakko Products, Inc. | Materials and Process Using a Three Dimensional Printer to Fabricate Sintered Powder Metal Components |
| CN205058634U (en) * | 2015-10-30 | 2016-03-02 | 黑龙江省科学院自动化研究所 | Fused deposition formula industry 3D printer feeding system |
| CN106925729B (en) * | 2017-05-11 | 2019-08-23 | 昆山盛事达机械有限公司 | Magnesium alloy and aluminium alloy semi-solid slurry preparation structure |
| CN109201982B (en) * | 2017-09-29 | 2020-08-04 | 中国航空制造技术研究院 | Forming device and forming method based on vacuum induction heating |
| CN108788157A (en) * | 2018-07-16 | 2018-11-13 | 南方科技大学 | A kind of increasing material manufacturing device and method |
| CN109226758B (en) * | 2018-10-22 | 2021-01-26 | 西安增材制造国家研究院有限公司 | Cylinder body rotary type multi-station annular powder-paving laser selective melting forming equipment |
-
2019
- 2019-05-28 CN CN201910453783.1A patent/CN110026557B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN110026557A (en) | 2019-07-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104875389B (en) | Three-dimensional printer and printing method and three-dimensional printing head | |
| CN103056473B (en) | A kind of continuous vacuum welding stove and welding method thereof | |
| EP4000765A1 (en) | Additive manufacturing with adjusted cooling responsive to thermal characteristic of workpiece | |
| EP3846995B1 (en) | Molding apparatus and methods | |
| CN108817397B (en) | Additive manufacturing device and method | |
| CN108941562B (en) | Method and device for manufacturing metal additive by continuous powder feeding induction heating | |
| CN105619744A (en) | Intelligent material plasticization single-line production system for three-dimensional rapid prototyping | |
| CN105537591A (en) | Metal 3D (three-dimensional) printing device and metal 3D printing method | |
| CN110026557B (en) | Direct-writing device for remelting mixed solid particles and forming method | |
| CN103847104A (en) | Three-dimensional waxing printer and using method thereof | |
| CN111889690B (en) | Gas atomization method of full-automatic vacuum tight coupling gas atomization device | |
| CN108817395B (en) | Additive manufacturing device and method | |
| CN110171135A (en) | A kind of 3D printing head | |
| CN106001567B (en) | Laser rapid prototyping supplies powder device in succession | |
| CN110369867A (en) | A kind of clean type laser cutting system with circulating water cooling function | |
| CN110125415B (en) | Rod remelting direct-writing forming equipment and rod remelting forming method | |
| JP3139570B2 (en) | Nozzle closing valve for metal injection molding equipment | |
| CN109676925B (en) | Material feeding device for 3D printer during working | |
| CN216324932U (en) | Integrated wax mold production device integrating wax melting and cooling | |
| CN213618275U (en) | PE tubular product extrusion moulding machine | |
| CN212579142U (en) | High-speed filling device of plastic fuse-element | |
| CN108747868B (en) | Grinding wheel manufacturing device based on induction heating additive manufacturing and using method | |
| CN104045058B (en) | A kind of controlled, non-caking unsaturated hydride preparation facilities of hydrogen richness and method | |
| CN113510220A (en) | Artificial skeleton forming device applying digital 3D printing technology | |
| CN113210568A (en) | Mix double spray 3D printer of feeding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |