CN109848563B - Synchronous laser polishing module based on existing laser additive equipment - Google Patents

Synchronous laser polishing module based on existing laser additive equipment Download PDF

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CN109848563B
CN109848563B CN201811608889.6A CN201811608889A CN109848563B CN 109848563 B CN109848563 B CN 109848563B CN 201811608889 A CN201811608889 A CN 201811608889A CN 109848563 B CN109848563 B CN 109848563B
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laser
polishing
axis
platform
moving platform
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CN109848563A (en
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管迎春
黎宇航
张震
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Tsinghua University
Beihang University
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Tsinghua University
Beihang University
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Priority to CH00997/19A priority patent/CH715701B1/en
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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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/352—Working by laser beam, e.g. welding, cutting or boring for surface treatment
    • 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
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/30—Platforms or substrates
    • B22F12/37—Rotatable
    • 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
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20—Direct sintering or melting
    • B22F10/25—Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
    • 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
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/50—Treatment of workpieces or articles during build-up, e.g. treatments applied to fused layers during build-up
    • 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
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/30—Platforms or substrates
    • B22F12/33—Platforms or substrates translatory in the deposition plane
    • 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
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/40—Radiation means
    • B22F12/44—Radiation means characterised by the configuration of the radiation means
    • B22F12/45—Two or more
    • 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
    • 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
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/34—Laser welding for purposes other than joining
    • B23K26/342—Build-up welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • 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
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • 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
    • 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
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/30—Process control
    • B22F10/32—Process control of the atmosphere, e.g. composition or pressure in a building chamber
    • 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
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/30—Process control
    • B22F10/36—Process control of energy beam parameters
    • 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
    • B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
    • 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
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • B22F2998/10—Processes characterised by the sequence of their steps
    • 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 a synchronous laser polishing module based on existing laser additive manufacturing equipment, belongs to the technical field of laser additive manufacturing, and mainly comprises a Z-axis cooperative motion system, a rotatable processing platform and an XY two-axis linkage cross sliding table. Compared with the prior art, the technical breakthrough of the invention is that the Laser Metal Deposition (LMD) technology is combined with the laser polishing technology, the laser polishing treatment can be respectively carried out on the surface area and the lateral area of the first layer, the second layer … and the Nth layer while the additive deposition forming is carried out, not only the problem of difficulty in large-area laser polishing of the large-inflection-point metal part of the cantilever structure can be solved, but also the problem of the laser incidence angle when the laser is used for polishing the curved surface inner/outer wall part with the high depth-diameter ratio can be solved, and the surface roughness of the LMD final formed part is effectively reduced by the laser polishing of each deposition layer.

Description

Synchronous laser polishing module based on existing laser additive equipment
Technical Field
The invention belongs to the technical field of laser additive manufacturing, and particularly relates to a synchronous laser polishing module based on existing laser additive equipment.
Background of the study
The Laser Additive Manufacturing (LAM) technology is one of the most potential advanced manufacturing technologies at present, and the method realizes the direct forming of three-dimensional solid parts by layering the digital data of a three-dimensional model and then realizing the layered processing and layer-by-layer accumulation, thereby not only being widely applied to the fields of aerospace, energy power, biomedical treatment and the like, but also having very important strategic significance on the development of the manufacturing industry in China.
Laser Metal Deposition (LMD) techniques featuring simultaneous powder feeding and Selective Laser Melting (SLM) techniques featuring powder bed powdering have been developed depending on the powder feeding manner. The Laser Metal Deposition (LMD) technology characterized by synchronous powder feeding can be combined with the traditional equal material (such as welding) or material reduction (such as turning and milling) technology, so that the advantages of various additive and equal material and material reduction processing technologies are fully exerted, and the integral, high-performance and low-cost processing and manufacturing of metal parts are realized.
However, the temperature distribution, dynamic characteristics and solidification behavior of the molten pool during the processing of Laser Metal Deposition (LMD) technology directly affect the forming accuracy, metallurgical defects, fused texture and mechanical properties. And LMD is at the very fast material melting and solidification speed in the forming process of synchronous powder feeding, and the gas can not have sufficient overflow time in the solidification process in the molten bath and forms the gas pocket, and too high temperature can lead to the molten bath to splash in addition, makes the powder granule that splashes adhere on the sedimentary deposit, leads to being difficult to form between the layer and closely remelting, and the interlayer combines badly, forms great interlaminar and does not fuse the defect, not only can produce the poor side step effect of precision and higher surface roughness, and the great stress concentration in hole edge often can become the crack initiation point, this has restricted LMD technical further practical application.
As a new processing mode, the laser polishing has the advantages of non-contact, micro-area, optional area, precision or ultra-precision realization, fine-grain reinforcement, increase of corrosion resistance and fatigue resistance of different materials, environmental protection, high efficiency and the like. The principle is that the uneven surface of the material reaches the melting temperature in a very short time, and after the convex surface of the material is melted, the molten metal is filled into the concave surface of the material under the action of surface tension and gravity. When the laser beam exits, the higher cooling rate solidifies the molten material, causing the convex surface to lower, the concave surface to level, and the cycle is repeated until the material surface roughness meets the use requirements.
In recent years, there have been used laser polishing techniques by both domestic and foreign scholars to improve the surface accuracy and reduce the surface roughness of additively manufactured parts, such as: the organization and the performance of laser polishing additive titanium alloy and nickel-based superalloy are respectively researched by Yingchun and the like of the mechanical institute of Beijing aerospace university, and the surface roughness of the part after the additive is reduced to be below 0.2 mu m; E.Yasa and J-P.Kruth of the mechanical engineering system of Shanun university, Belgium adopt laser polishing remelting treatment to reduce the surface porosity and surface roughness of the additive 316L part; the influence of different laser polishing parameters (scanning speed, laser power, lap joint rate and the like) on the surface quality of the additive Ti-6Al-4V part is researched by S.Marimuth and the like at the British scientific verticality manufacturing technical center; b.rosa et al, south communication and control institute, france, performed laser polishing studies on additive 316L parts; meanwhile, D.Bhaduri et al of the mechanical engineering system of the university of Bominghan, England, adopt different laser polishing energy densities to study the surface roughness of the material-added 316L part; laser polishing studies were conducted on additive Ti6Al4V, nickel 625, and CoCr alloy parts, respectively, by the university of hong kong tally industries and systems engineering.
However, the laser polished additive parts are mostly concentrated on a plane or an inclined plane, the structure is relatively simple, and although the research on laser polishing of concave additive CoCr alloy parts has been performed by k.c. yung et al of the industry and the system engineering system of hong kong university, the research is a one-step processing mode that laser polishing is performed after additive forming on the existing additive equipment is completed, and additive and polishing cannot be performed. In addition, the current LMD technology is often used for forming various parts with complex shapes, and for metal parts with large inflection points and curved surface inner/outer wall parts with high depth-diameter ratio, which contain cantilever structures, the limitation of the stroke range of a polishing platform and the height-diameter ratio of the parts is often caused, so that laser beams cannot irradiate a specified polishing position during laser polishing, and the optimal polishing path and processing parameters cannot be obtained. Although the foreign scholars adjust the incident angle of the laser beam by adjusting the scanning galvanometer at present, the scanning range of the incident angle is limited and can only reach +/-10 degrees, and the laser polishing requirement cannot be met for curved surface inner wall parts with high depth-diameter ratio, so that the laser polishing research on the large-inflection-point metal parts with cantilever structures and curved surface inner/outer wall parts with high depth-diameter ratio is seriously insufficient.
Therefore, the research and development of a simple process, high polishing efficiency, high automation degree, environmental protection and capability of improving the surface precision of the LMD complex parts, and the realization of a module for synchronous laser polishing on the existing laser material increase equipment, the one-step processing mode of material increase and polishing is formed, and the problem to be solved by the current researchers is urgently solved.
Disclosure of Invention
The invention aims to provide a synchronous laser polishing module based on the existing laser material adding equipment. This module combines together current Laser Metal Deposition (LMD) technique and laser polishing technique, can be when the vibration material disk takes shape, respectively to the first layer, the second floor …, the surface area and the side direction region on the Nth layer carry out laser polishing and handle, not only can solve the problem of cantilever structure's big inflection point metal parts large tracts of land laser polishing difficulty, and the laser incident angle problem when can solving the curved surface inside/outside wall part of laser polishing height depth-diameter ratio, powder when effectively having improved LMD deposit through the laser polishing to each sedimentary deposit splashes and the adhesion problem, the deposit of the next floor is formed and is provided good overlap joint basis, the surface roughness of the final forming part of LMD has effectively been reduced.
The invention relates to a synchronous laser polishing module based on the existing laser material adding equipment, which mainly comprises a Z-axis cooperative motion system, a rotatable processing platform and an XY two-axis linkage cross sliding table, and is characterized in that: the Z-axis cooperative motion system comprises a laser metal deposition double-path synchronous powder feeding laser head and a laser polishing laser head, the two laser heads are arranged in parallel, and the positions of the two laser heads along the Z-axis direction are controlled by the laser metal deposition system and the laser polishing system respectively; the rotatable processing platform is fixedly arranged on the XY two-axis linkage cross sliding table and comprises a supporting platform rotating around an X axis and a chuck rotating around a Z axis, the chuck rotating around the Z axis is arranged on the supporting platform rotating around the X axis, and the supporting platform and the chuck are respectively controlled by two alternating current servo motors to rotate; XY diaxon linkage cross slip table include X axle moving platform, drive X axle horizontal motion's alternating current servo motor, Y axle moving platform, drive Y axle horizontal motion's alternating current servo motor, above-mentioned X axle moving platform installation is fixed under above-mentioned two parallel laser heads, and Y axle moving platform installs on X axle moving platform, but Y axle moving platform is last to install the rotary processing platform simultaneously.
Compared with the prior art, the invention has the following advantages:
(1) according to the invention, a Laser Metal Deposition (LMD) technology is combined with a laser polishing technology, so that the surface areas and the lateral areas of the first layer, the second layer … and the Nth layer can be respectively subjected to laser polishing treatment while additive deposition forming is carried out, the problem of difficulty in large-area laser polishing of large-inflection-point metal parts of a cantilever structure can be solved, and the problem of laser incidence angle when the parts with high depth-diameter ratio and curved inner/outer walls are polished by laser can be solved;
(2) the laser polishing method effectively improves the problems of powder splashing and adhesion during LMD deposition by laser polishing of each deposition layer, provides a good lap joint basis for deposition forming of the next layer, and effectively reduces the surface roughness of the LMD final forming part;
(3) the polishing device has the advantages of simple structure, high polishing efficiency, high automation degree and environmental protection, can reduce the surface roughness of the LMD-formed complex component, can realize large-area and repeated processing of any region of the complex component, and is easy to realize industrial application.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a rotatable processing platform according to the present invention;
FIG. 3 is a schematic structural view of an XY two-axis linkage cross sliding table according to the present invention;
FIG. 4 is a schematic view of the polishing process of the present invention;
FIG. 5 is a schematic view of a large-inflection point metal part with a cantilever structure;
fig. 6 is a schematic view of a curved inner/outer wall part with a high depth-to-diameter ratio.
The names of the parts in the figure are as follows:
1. a laser head for laser polishing; 2. a double-path synchronous powder feeding laser head for laser metal deposition; 3. a rotatable processing platform; 4. the XY two shafts are linked with a cross sliding table; 31. an AC servo motor for controlling the rotation of the supporting platform; 32. a support platform; 33. a chuck; 34. an AC servo motor for controlling the chuck to rotate; 41. a Y-axis moving platform; 42. an X-axis moving platform; 43. an AC servo motor for driving the Y axis; 44. an AC servo motor for driving the X axis; 5. a large inflection point metal part having a cantilever structure; 6. a metal substrate; 7. high depth-diameter ratio curved surface inner/outer wall parts.
Detailed Description
For a better understanding of the present invention, reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings and are not intended to limit the scope of the invention.
The implementation example takes the processing of a large-inflection-point metal part (5) with a cantilever structure and a curved surface inner/outer wall part (7) with a high depth-diameter ratio as an example, combines a Laser Metal Deposition (LMD) technology with a laser polishing technology, and has the following working process:
firstly, selecting a proper metal substrate (6), installing the metal substrate on a chuck (33), adjusting the focal length position of a double-path synchronous powder feeding laser head (2) for laser metal deposition, aligning the focal length position to the metal substrate (6), starting a laser metal deposition system and a synchronous powder feeding system after selecting a proper overlap ratio and a deposition working path as shown in figure 1, starting additive forming, and performing under the protection of inert gas in the forming process. In the additive forming process, the alternating current servo motor (43) and the alternating current servo motor (44) can respectively carry out synchronous control on the Y-axis moving platform and the X-axis moving platform, so that the horizontal movement of the rotatable processing platform (3) is realized, and the implementation of each deposition path is effectively ensured. After the first layer is deposited and formed, the laser metal deposition system and the synchronous powder feeding system are suspended, the alternating current servo motor (44) is started to drive the X-axis moving platform (42), and the rotatable processing platform (3) and the Y-axis moving platform (41) are moved to be right below the laser head (1) for laser polishing, as shown in figure 4. And adjusting the position of a laser head (1) for laser polishing by a laser polishing system, finding a proper focal length, selecting proper laser polishing parameters, and polishing the first deposition layer under the protection of inert gas. And when the laser polishing system is suspended after polishing is finished, starting an alternating current servo motor (44) to drive an X-axis moving platform (42), moving a rotatable processing platform (3) and a Y-axis moving platform (41) to be under a double-path synchronous powder feeding laser head (2) for laser metal deposition, and starting metal deposition and reciprocating circulation of a second layer to realize the technological effect of laser polishing while additive forming. When the curved side wall of a large-inflection-point metal part (5) with a cantilever structure or the curved inner wall of a curved inner/outer wall part (7) with a high depth-diameter ratio needs to be polished, the polishing angle of the material-added part can be adjusted by driving an alternating current servo motor (31) or an alternating current servo motor (34) to respectively control the rotating angles of a supporting platform (32) and a chuck (33) in a rotating mode, and therefore laser polishing of each deposition layer is accurately achieved until the whole part is machined.
The above examples are provided for illustrative purposes and are not intended to limit the scope of the present invention, and any modifications, improvements, etc. made to the methods, steps, or conditions within the spirit and principle of the present invention are within the scope of the present invention.

Claims (1)

1. The utility model provides a synchronous laser polishing module based on current laser vibration material disk equipment, mainly includes Z axle cooperation motion system, rotatable processing platform, XY diaxon linkage cross slip table, its characterized in that: the Z-axis cooperative motion system comprises a laser metal deposition double-path synchronous powder feeding laser head and a laser polishing laser head, the two laser heads are arranged in parallel, and the positions of the two laser heads along the Z-axis direction are controlled by the laser metal deposition system and the laser polishing system respectively; the rotatable processing platform is fixedly arranged on the XY two-axis linkage cross sliding table and comprises a supporting platform rotating around an X axis and a chuck rotating around a Z axis, the chuck rotating around the Z axis is arranged on the supporting platform rotating around the X axis, and the supporting platform and the chuck are respectively controlled by an alternating current servo motor to rotate; XY diaxon linkage cross slip table include X axle moving platform, drive X axle horizontal motion's alternating current servo motor, Y axle moving platform, drive Y axle horizontal motion's alternating current servo motor, above-mentioned X axle moving platform installation is fixed under above-mentioned two parallel laser heads, and Y axle moving platform installs on X axle moving platform, but Y axle moving platform is last to install the rotary processing platform simultaneously.
CN201811608889.6A 2018-12-26 2018-12-26 Synchronous laser polishing module based on existing laser additive equipment Active CN109848563B (en)

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CN201811608889.6A CN109848563B (en) 2018-12-26 2018-12-26 Synchronous laser polishing module based on existing laser additive equipment
CH00997/19A CH715701B1 (en) 2018-12-26 2019-08-08 Laser additive manufacturing system comprising a laser metal coating system and a synchronized laser polishing system.

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CN109848563A (en) 2019-06-07
CH715701B1 (en) 2020-08-14

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