CN113000863A - Follow-up dynamic cold restraint device and method for metal additive manufacturing equipment - Google Patents
Follow-up dynamic cold restraint device and method for metal additive manufacturing equipment Download PDFInfo
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- CN113000863A CN113000863A CN202110201246.5A CN202110201246A CN113000863A CN 113000863 A CN113000863 A CN 113000863A CN 202110201246 A CN202110201246 A CN 202110201246A CN 113000863 A CN113000863 A CN 113000863A
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- additive manufacturing
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- 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
- B22F3/24—After-treatment of workpieces or articles
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- 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
- B33Y40/20—Post-treatment, e.g. curing, coating or polishing
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- 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
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
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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 discloses a follow-up dynamic cold restraint device and a follow-up dynamic cold restraint method for metal additive manufacturing equipment.
Description
Technical Field
The invention belongs to the field of metal structural part fuse wire/powder feeding type additive manufacturing (3D printing), and particularly relates to a follow-up dynamic cold restraint device and method for metal additive manufacturing equipment.
Background
The Additive Manufacturing (AM) technology is a technology for manufacturing a solid part by designing a data model through a CAD and adopting a method of accumulating materials layer by layer, and in the additive manufacturing process, a conventional tool and a fixture are not needed, and a part with a complex shape can be quickly and accurately manufactured by using three-dimensional data, so that the machining process is simplified, the manufacturing period of parts is shortened, and the technology is a manufacturing technology which has the advantages of high efficiency, low consumption, and great reduction of research and development costs. With the rapid development of additive manufacturing technology, metal additive manufacturing can realize direct manufacturing of highly complex metal components which are difficult to realize by traditional manufacturing methods, such as direct application in metal prostheses, aerospace complex structural components and other fields. In the fields of aerospace and the like, efficient and low-cost manufacturing of high-performance, large-scale and integrated metal structural parts is urgently needed to be solved, and a novel manufacturing method is provided by a metal additive manufacturing technology. The metal additive manufacturing mainly takes electric arc, laser, electron beam and the like as heat sources, melts metal into liquid state at high temperature, and accumulates layer by layer to manufacture a metal structural part. At present, the method for improving the strength of the metal additive printing piece generally adopts means such as hammering strengthening and the like to enable a welding bead to generate plastic deformation and achieve the purposes of improving dislocation density and refining and strengthening crystal grains.
Under the action of cold-hot alternating thermal cycle of metal additive manufacturing, dislocation density is greatly reduced by the recovery recrystallization of a deformed structure, at the moment, the main toughening effect mainly comes from grain refinement, the overall strengthening effect of a metal printing piece is reduced, and the inhibition and regulation of the recovery recrystallization behavior can be realized by utilizing a dynamic cold restraint technology, so that the high-density dislocation cannot be obviously recovered due to low temperature, the toughening effect is realized, and the aim of strengthening the mechanical property of the metal printing piece is fulfilled.
Disclosure of Invention
The invention aims to overcome the defects and provide a follow-up dynamic cold restraint device and a follow-up dynamic cold restraint method for metal additive manufacturing equipment, which are used for inhibiting and regulating the recovery recrystallization behavior of a printed piece subjected to a plastic deformation strengthening method such as hammering strengthening and the like, improving the strengthening effect of the plastic deformation strengthening method such as hammering strengthening and the like, and achieving the purposes of improving the dislocation density, refining grains and improving the structure performance of a metal printed piece.
In order to achieve the purpose, the follow-up dynamic cold restraint device for the metal additive manufacturing equipment comprises a connecting plate, wherein the connecting plate is connected with an insulating clamping block, a transverse position regulator and a longitudinal position regulator, the insulating clamping block is fixed on a printing head, the transverse position regulator is connected with a cooling block, the cooling block is connected with a cooling medium circulating system, and the cooling block is used for clamping and tightly contacting a workpiece.
The longitudinal position adjuster is connected with the insulating clamping block.
The bottom and the side of the cooling block are covered with copper braided belts.
The cooling block is provided with a medium inlet and a medium outlet, and the medium inlet and the medium outlet are connected with a cooling medium circulating system through a cooling medium conduit.
The cooling medium conduit is connected to the medium inlet and the medium outlet through a quick coupling.
The workpiece is machined on the substrate and cold constrained by the apparatus.
A method of operation of a follow-up dynamic cold restraint device for metal additive manufacturing equipment, comprising the steps of:
s1, adjusting the position of the cooling block by the longitudinal position adjuster/the lateral position adjuster;
s2, closely contacting the cooling block on the workpiece;
and S3, starting a cooling medium circulation system, continuously regulating and controlling the temperature of the workpiece by the cooling block when the printing head prints, and realizing the inhibition and regulation and control of the recovery recrystallization behavior by using a dynamic cold restraint technology.
The longitudinal height direction distance between the cooling block and the workpiece is automatically adjusted through the longitudinal position adjuster.
The transverse width direction distance between the cooling block and the workpiece is automatically adjusted through the transverse position adjuster.
The cooling block is closely contacted on the workpiece through a copper braided belt.
Compared with the prior art, the device clamps the workpiece through the cooling block, inhibits and regulates the recovery recrystallization behavior of the printed piece subjected to the plastic deformation strengthening method such as hammering strengthening and the like through the dynamic cold constraint technology, improves the effect of the plastic deformation strengthening method such as hammering strengthening and the like, and achieves the purposes of improving the dislocation density, refining grains and improving the structure performance of the metal printed piece.
Furthermore, the invention is provided with a transverse position regulator and a longitudinal position regulator, the two-direction position regulation can ensure that the cooling block is in close contact with the printing workpiece through the cooling block, the distance can be regulated in a certain transverse range for thin-wall parts with certain thickness, the position of the cooling block can be changed through position regulation for larger solid parts, and even if the heights of two sides of the manufactured workpiece are not consistent, the bottoms of the two cooling blocks are still in close contact with the workpiece, thereby realizing the purpose of cold restraint.
Furthermore, the copper braided belts are covered at the bottom and the side surfaces of the cooling block, and can enable the cooling block to be in close contact with a manufactured workpiece, so that the cold restraint effect is ensured.
The method of the invention is that when the workpiece is printed, the cooling block is continuously used for carrying out cold restraint on the workpiece, the recovery recrystallization behavior of the printed piece by plastic deformation strengthening methods such as hammering strengthening and the like can be inhibited and regulated, the strengthening effect of the plastic deformation strengthening methods such as hammering strengthening and the like is improved, and the purposes of improving dislocation density, refining crystal grains and improving the structure performance of the metal printed piece are achieved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a left side view of the follower cold restraint of the present invention;
FIG. 3 is a top view of the follower cold restraint of the present invention;
the printing device comprises a printing head 1, an insulating clamping block 2, a longitudinal position regulator 3, a connecting plate 4, a printing material 5, a transverse position regulator 6, a cooling block 7, a base plate 8, a cooling medium guide pipe 9, a quick joint 10, a medium inlet 10-1, a medium outlet 10-2, a medium outlet 11, a copper woven belt 12, a workpiece 13 and a cooling medium circulating system.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1, 2 and 3, a follow-up dynamic cold restraint device for metal additive manufacturing equipment comprises a connecting plate 4, wherein the connecting plate 4 is connected with an insulating clamping block 2, a transverse position regulator 6 and a longitudinal position regulator 3, the insulating clamping block 2 is fixed on a printing head 1, the transverse position regulator 6 is connected with a cooling block 7, the cooling block 7 is connected with a cooling medium circulation system 13, and the cooling block 7 is used for clamping and closely contacting a workpiece 12 to perform machining manufacturing on a base plate 8 and performing cold restraint by the device. The connecting plate 4 is provided with a transverse position regulator 6 and a longitudinal position regulator 3, and the longitudinal position regulator 3 is connected with the insulating clamping block 2. The longitudinal position adjuster 3 mainly acts on the vertical position self-adjustment of the cooling block 7, and the lateral position adjuster 6 mainly acts on the horizontal position self-adjustment of the cooling block 7.
The cooling block 7 is provided with a medium inlet 10-1 and a medium outlet 10-2, and the medium inlet 10-1 and the medium outlet 10-2 are connected with a cooling medium circulating system 13 through a cooling medium conduit 9. The cooling medium conduit 9 is connected to the medium inlet 10-1 and the medium outlet 10-2 through the quick coupling 10.
The bottom and the side of the cooling block 7 are covered with copper braided belts 11, which mainly aims at improving the contact area and the heat dissipation efficiency.
A method of operation of a follow-up dynamic cold restraint device for metal additive manufacturing equipment, comprising the steps of:
s1, adjusting the position of the cooling block by the longitudinal position adjuster/the lateral position adjuster;
s2, closely contacting the cooling block on the workpiece through a copper woven belt;
and S3, starting a cooling medium circulation system, continuously regulating and controlling the temperature of the workpiece by the cooling block when the printing head prints, and realizing the inhibition and regulation and control of the recovery recrystallization behavior by using a dynamic cold restraint technology.
When the printing workpiece 12 on the substrate 8 is a thin-wall part, the printing workpiece can be clamped between the cooling blocks 7 for cooling, and the transverse position regulator can be regulated within a certain range; in the case of a larger solid piece, it can be brought into contact with the copper braid 11 below the cooling block, while the longitudinal position adjuster 3 adjusts the vertical position of the cooling block. The two-direction position adjustment can ensure the close contact of the cooling block and the printing workpiece, can adjust the thin-wall part within a certain range, and can also realize the cold restraint purpose through the contact of the bottoms of the two cooling blocks for a larger solid part.
Claims (10)
1. The follow-up dynamic cold restraint device for the metal additive manufacturing equipment is characterized by comprising a connecting plate (4), wherein the connecting plate (4) is connected with an insulating clamping block (2), a transverse position regulator (6) and a longitudinal position regulator (3), the insulating clamping block (2) is fixed on a printing head (1), the transverse position regulator (6) is connected with a cooling block (7), the cooling block (7) is connected with a cooling medium circulating system (13), and the cooling block (7) is used for clamping and tightly contacting a workpiece (12).
2. A follow-up dynamic cold restraint device for metal additive manufacturing equipment according to claim 1, characterized in that the longitudinal position adjuster (3) is connected with the insulating clamping block (2).
3. A follow-up dynamic cold restraint device for metal additive manufacturing equipment according to claim 1, characterized in that the bottom and sides of the cooling block (7) are covered with copper braided bands (11).
4. The follow-up dynamic cold restraint device for the metal additive manufacturing equipment is characterized in that a medium inlet (10-1) and a medium outlet (10-2) are formed in the cooling block (7), and the medium inlet (10-1) and the medium outlet (10-2) are connected with the cooling medium circulating system (13) through a cooling medium conduit (9).
5. The follow-up dynamic cold restraint device for metal additive manufacturing equipment according to claim 4, characterized in that the cooling medium conduit (9) connects the medium inlet (10-1) and the medium outlet (10-2) through a quick coupling (10).
6. A follow-up dynamic cold restraint device for metal additive manufacturing equipment according to claim 1, characterized in that the workpiece (12) is machined on the base plate (8) and is cold restrained by the device.
7. The method of operating a follower dynamic cold restraint apparatus for metal additive manufacturing equipment of claim 1, comprising the steps of:
s1, adjusting the position of the cooling block (7) through the longitudinal position adjuster (3) and the transverse position adjuster (6);
s2, closely contacting the cooling block (7) on the workpiece (12);
and S3, starting the cooling medium circulation system (13), continuously regulating and controlling the temperature of the workpiece (12) by the cooling block (7) when the printing head (1) prints, and realizing the inhibition and regulation and control of the recovery recrystallization behavior by using the dynamic cold restraint technology.
8. Working method of a follow-up dynamic cold restraint device for metal additive manufacturing equipment according to claim 7, characterized in that the longitudinal heightwise distance between the cooling block (7) and the workpiece (12) is automatically adjusted by the longitudinal position adjuster (3).
9. The working method of the follow-up dynamic cold restraint device for the metal additive manufacturing equipment according to claim 7, characterized in that the transverse width direction distance between the cooling block (7) and the workpiece (12) is automatically adjusted by the transverse position adjuster (6).
10. The working method of the follow-up dynamic cold restraint device for the metal additive manufacturing equipment according to claim 7, characterized in that the cooling block (7) is in close contact on the workpiece (12) through a copper braided belt (11).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110201246.5A CN113000863B (en) | 2021-02-23 | 2021-02-23 | Follow-up dynamic cold restraint device and method for metal additive manufacturing equipment |
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| CN202110201246.5A CN113000863B (en) | 2021-02-23 | 2021-02-23 | Follow-up dynamic cold restraint device and method for metal additive manufacturing equipment |
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| CN113000863A true CN113000863A (en) | 2021-06-22 |
| CN113000863B CN113000863B (en) | 2023-04-07 |
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Cited By (2)
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| CN114871544A (en) * | 2022-06-21 | 2022-08-09 | 北京奥邦新材料有限公司 | Water-cooling gun head based on large heat energy input electric arc additive |
| CN115338430A (en) * | 2022-08-19 | 2022-11-15 | 江苏宇钛新材料有限公司 | Laser material increase device and method for alloy thin-wall structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114871544A (en) * | 2022-06-21 | 2022-08-09 | 北京奥邦新材料有限公司 | Water-cooling gun head based on large heat energy input electric arc additive |
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| CN113000863B (en) | 2023-04-07 |
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