CN112192038A - Large-breadth metal foil-shaped brazing filler metal placing mechanism and laser cutting method using same - Google Patents
Large-breadth metal foil-shaped brazing filler metal placing mechanism and laser cutting method using same Download PDFInfo
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- CN112192038A CN112192038A CN202011011534.6A CN202011011534A CN112192038A CN 112192038 A CN112192038 A CN 112192038A CN 202011011534 A CN202011011534 A CN 202011011534A CN 112192038 A CN112192038 A CN 112192038A
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- brazing filler
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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
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
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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
- B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
- B23K26/123—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in an atmosphere of particular gases
-
- 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
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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Abstract
The invention discloses a large-format metal foil brazing filler metal placing mechanism and a laser cutting method using the same, wherein the placing mechanism comprises a supporting base plate and a bonding structure, and the bonding structure is used for bonding the metal foil brazing filler metal so as to fix the metal foil brazing filler metal on the supporting base plate; the support bottom plate is distributed with vent holes for allowing cutting gas of laser processing equipment to pass through the vent holes during laser processing; the adhesive structure comprises a hot melt adhesive. The laser cutting method of the large-breadth metal foil-shaped brazing filler metal is realized by utilizing the placing mechanism, the placing mechanism is placed on a working table top of laser cutting equipment, and the shape of the large-breadth metal foil-shaped brazing filler metal is processed by the laser cutting equipment. The placing mechanism is simple in structure and convenient and fast to operate, the placing mechanism can be smoothly operated after cutting is finished, and the laser cutting equipment is a universal laser cutting machine tool, so that the cutting energy density is effectively solved, and the processing universality of the metal foil-shaped brazing filler metal is improved.
Description
Technical Field
The invention belongs to the field of hot working, and particularly relates to a large-width metal foil-shaped brazing filler metal placing mechanism and a laser cutting method using the large-width metal foil-shaped brazing filler metal placing mechanism.
Background
With the improvement of science and technology and the increase of income of people, more and more people go out and choose to take the airplane for going out. However, at present, most airplanes cannot use the mobile phone, so that the time and the light on the airplane are isolated from the world. The use of notebook computers or tablet computers or mobile terminals to access the internet through wireless broadband, mobile office, call and send short messages, and web surfing entertainment has become an urgent need for many aviation travelers.
The existing network system used on the airplane is certified by airworthiness, the internet surfing data of the airplane is transmitted to a satellite through a wireless device of the airplane, and the satellite is transmitted to a receiving station on the ground, so that the flight signal is not interfered and the flight safety is not influenced. If the mobile phone is used for surfing the internet in flight, the airplane can start the interference equipment, all GPRS signals of the mobile phone are shielded, so that the safety risk is avoided, and then the mobile phone is connected with a wireless local area network on the airplane and surfs the internet through satellite communication.
With the rapid development of civil aviation in China, the number of civil aviation airplanes, the airline mileage and the number of passengers are increased, and the demand of the airplanes for surfing the internet is also increased. WiFi speed on aircraft is slow today because the radio spectrum allocated by the communications commission to air-to-ground connections is limited to 300 mhz to 3000 mhz. In the aircraft, a frequency band of only 3 mhz is allocated for wireless connection.
The communications committee has opened up some high frequency bands for wireless connectivity on aircraft. Ku band satellites are in common use at present, and Ka band satellite communication represents the future development direction. Both Ku and Ka bands require large planar patch antennas to implement, with long test dimensions of substantially around 1 meter. The large plane panel antenna is composed of a multi-layer structure, each layer is a precision machining structure, stable and firm connection is achieved through brazing among the layers, and brazing filler metal needs to be accurately preset at the solid position connected with each layer before brazing.
Generally, the brazing adopts a metal foil-shaped brazing filler metal with the thickness of 0.05mm, and for the specification size with the width exceeding 250mm, the prior art can only press the foil with the thickness of 0.1mm and above; the processing of the brazing filler metal foil with a simple shape generally adopts a blade to directly cut, and the brazing filler metal foil with a complex shape needs to be manufactured with a metal pressing sheet and fixed reliably and then processed by a milling machine. However, the preparation time for milling is long, the requirements on a machine tool and a cutter are high, and the processing efficiency is low. For a complex brazing filler metal foil with a small size, in order to improve the processing efficiency, a laser engraving machine is generally adopted in the industry for cutting, however, the stroke of the laser engraving machine is small and generally does not exceed 0.5 m, and for a brazing filler metal foil with the thickness of 0.1mm, due to the fact that the laser power is small, cutting is not thorough, and the cutting edge has thermal deformation, the requirement of brazing filler metal processing is difficult to meet.
Disclosure of Invention
Aiming at the defects or the improvement requirements of the prior art, the invention provides a large-format metal foil brazing filler metal placing mechanism and a laser cutting method using the same, and aims to effectively realize stable and reliable placing by arranging a supporting base plate with a vent hole and matching with a hot-melt adhesive and an adhesive tape, thereby solving the technical problem of large-format metal foil brazing filler metal cutting.
To achieve the above object, according to one aspect of the present invention, there is provided a placement mechanism for a large-format metal foil-like brazing filler metal, characterized in that the placement mechanism includes a support base plate and a bonding structure, wherein:
the support bottom plate is distributed with vent holes for allowing cutting gas of laser processing equipment to pass through the vent holes and be discharged during laser processing;
the bonding structure comprises a hot-melt adhesive for bonding the metal foil-shaped brazing filler metal, so that the metal foil-shaped brazing filler metal is fixed on the supporting base plate.
Preferably, the supporting bottom plate is a metal plate with a light reflection rate of more than 95%.
Preferably, the support base plate is made of copper.
Preferably, the vent holes are long-strip-shaped, a vent groove perpendicular to the vent holes is formed in the support bottom plate, the vent grooves are multiple, and each vent groove is communicated with two vent holes.
Preferably, the bonding structure further comprises an adhesive tape for reinforcing an edge of the metal foil-like filler metal on the support base.
Preferably, the hot melt adhesive is polyvinyl alcohol.
According to another aspect of the present invention, there is provided a laser cutting method for a large-format metal foil brazing filler metal, which is implemented by using the placing mechanism, the placing mechanism is placed on a workbench of a laser cutting device, and the laser cutting device is used to machine the shape of the large-format metal foil brazing filler metal, wherein the specific cutting and machining steps are as follows:
s1: prepressing and flattening coiled metal foil-shaped brazing filler metal, adhering a single piece of prepressed and flattened metal foil-shaped brazing filler metal to the upper surface of a supporting base plate by adopting a hot-melt adhesive, reinforcing the edge of the metal foil-shaped brazing filler metal on the supporting base plate by using an adhesive tape, and placing the supporting base plate on a working table of laser cutting equipment;
s2: opening a laser cutting device, presetting the shape processing program of the metal foil-shaped brazing filler metal in the laser cutting device, adjusting laser processing parameters, and adopting non-oxidizing gas as cutting gas;
s3: operating a processing program, and cutting and processing the metal foil-shaped brazing filler metal;
s4: and closing the laser cutting equipment, taking down the brazing filler metal placing mechanism, tearing off the adhesive tape, putting the supporting base plate and the metal foil-shaped brazing filler metal into hot water for soaking, and gradually taking down the cut and formed metal foil-shaped brazing filler metal from the supporting base plate.
Preferably, the cutting gas is an inert gas.
Preferably, the method further comprises the step S5: the supporting bottom plate is cleaned and aired for later use, so that the placing mechanism can be reused.
Preferably, the size of the supporting bottom plate is slightly larger than that of the metal foil-shaped brazing filler metal required to be cut, so that the cut surface area of the metal foil-shaped brazing filler metal is provided with vent holes.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
(1) according to the placing mechanism of the metal foil-shaped brazing filler metal, the composite mechanism consisting of the supporting base plate, the hot-melt adhesive and the adhesive tape is arranged, the ventilating groove is formed in the supporting base plate, the range of the ventilating groove is larger than the size of the brazing filler metal to be cut, and the stability of foil materials when the brazing filler metal is cut is improved.
(2) According to the placing mechanism of the metal foil-shaped brazing filler metal, the residual materials around the metal foil-shaped brazing filler metal are reinforced by the adhesive tape, so that the reliability of the brazing filler metal in cutting is effectively improved.
(3) According to the placing mechanism of the metal foil-shaped brazing filler metal, the metal foil-shaped brazing filler metal is bonded through the hot melt adhesive, so that the metal foil-shaped brazing filler metal is connected with the supporting base plate, and the convenience of taking down the parts after cutting is improved;
(4) according to the placing mechanism of the metal foil-shaped brazing filler metal, the non-oxidizing gas during cutting is replaced by the inert gas, so that the phenomenon that the brazing filler metal is oxidized during cutting to influence the use performance can be effectively avoided.
(5) The laser cutting equipment is a universal laser cutting machine tool, effectively solves the problem of cutting energy density, does not need to be changed specially, and improves the processing universality of the metal foil-shaped brazing filler metal.
(6) The laser cutting method of the large-breadth metal foil-shaped brazing filler metal has the advantages that the placing mechanism is simple in structure and convenient to operate, the placing mechanism can be operated smoothly after cutting is completed, the main structure supporting base plate can be used repeatedly after being cleaned, the applicability of cutting of the metal foil-shaped brazing filler metal is guaranteed, and the laser cutting method has good use value and popularization value.
Drawings
FIG. 1 is a schematic structural view of a support base plate of a mechanism for placing a metal foil-like brazing filler metal in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a large-format metal foil-shaped brazing filler metal in an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, the placing mechanism for the large-format metal foil-shaped brazing filler metal 3 comprises a supporting base plate 1 and a bonding structure, wherein the bonding structure is used for bonding the metal foil-shaped brazing filler metal 3 so as to fix the metal foil-shaped brazing filler metal 3 on the supporting base plate 1; the bonding structure comprises a hot-melt adhesive, so that bonding is conveniently realized and the metal foil-shaped brazing filler metal 3 is conveniently removed. The invention adopts the hot melt adhesive, which is coated in a melting state and cooled to be a solid state to complete bonding, so that the metal foil-shaped brazing filler metal 3 can be conveniently fixed on the supporting bottom plate 1 in a bonding mode, can be melted again when being heated after laser processing is completed, and can be conveniently separated from the supporting bottom plate 1 after the processing is completed. The hot melt adhesive of the present invention is preferably a polyvinyl alcohol which is completely soluble in hot water for easy removal.
The supporting bottom plate 1 is an integrally formed whole, vent holes 2 are distributed on the supporting bottom plate, so that cutting gas of laser processing equipment can pass through the vent holes 2 during laser processing, and the metal foil-shaped brazing filler metal 3 at the vent holes 2 is in a suspended state; the cutting gas is allowed to escape through these vent holes 2 because if the gas flow formed by the cutting gas is not led out, the gas flow blowing force deforms the metal foil-like brazing filler metal 3 and even blows off the surface of the supporting base plate 1, thereby affecting the forming accuracy and flatness of the metal foil-like brazing filler metal 3.
Further, the supporting base plate 1 is a metal plate with a light reflection rate of more than 95%, and the metal with higher light reflection rate includes Au, Cu, Mo and the like. The supporting base plate 1 is preferably made of copper, because if the light reflection rate of the supporting base plate 1 is not high, laser can melt the supporting base plate 1, so that the metal foil-shaped brazing filler metal 3 and the supporting base plate 1 are welded together in a fusion mode and cannot be separated; copper is preferred because it is the most common of the high reflectance metals and the reflectance of 800nm copper can reach 98.1%. Therefore, the support base plate 1 is not melted and cut at the time of laser processing of the metal foil-like brazing material 3.
Further, the vent holes 2 are strip-shaped, vent grooves 4 perpendicular to the vent holes 2 are formed in the supporting bottom plate 1, the vent grooves 4 are multiple, and each vent groove 4 is communicated with two vent holes 2. When the air vent 2 adopting the strip shape can play a role of ventilation, the processing is convenient, the air flow guiding effect is good, and the air vent groove 4 is additionally arranged, so that the ventilation effect can be further improved.
Further, the bonding structure further includes an adhesive tape for reinforcing the edge of the metal foil-like filler metal 3 on the support base plate 1, because the edge of the metal foil-like filler metal 3 has a problem that the adhesive force is not so large and the edge is not reinforced, and a displacement and deformation are generated when the edge is not reinforced by an air flow, the adhesive tape is used for reinforcement. The adhesive tape is a commercially available finished product.
According to another aspect of the present invention, there is also provided a laser cutting method for a large-format metal foil brazing filler metal 3, which is implemented by using the placing mechanism, the placing mechanism is placed on a workbench of a laser cutting device, and the laser cutting device is used for processing the shape of the large-format metal foil brazing filler metal 3, wherein the specific cutting processing steps are as follows:
s1: sticking a single piece of metal foil-shaped brazing filler metal 3 with a large width (the maximum specification of the currently processable coiled aluminum brazing filler metal is 0.1mm thick and 400mm wide, in the embodiment, the coiled aluminum brazing filler metal with the specification is cut into single pieces with the thickness of 0.1mm multiplied by 1200mm in length multiplied by 400mm in width, and a heavy object is pressed to be flat) to the upper surface of a supporting base plate 1 by using a hot melt adhesive, reinforcing the edge of the metal foil-shaped brazing filler metal 3 on the supporting base plate 1 by using an adhesive tape, and then placing the supporting base plate 1 on a working table top of laser cutting equipment;
s2: opening a laser cutting device, presetting the shape processing program of the metal foil brazing filler metal 3 in the laser cutting device, and adjusting laser processing parameters (the adjustable parameters of the laser device mainly comprise processing speed, laser power, airflow rate and the like, wherein the processing speed basically has no influence on the processing of the metal foil brazing filler metal 3, the laser power is selected according to the thickness of a cutting plate, the aluminum of the adopted aluminum brazing filler metal also belongs to a material with higher light reflection rate and also needs certain laser power, the airflow rate is preferably set to be 8L/min), non-oxidizing gas is adopted as cutting gas, and the cutting gas is preferably inert gas, such as argon;
s3: operating a processing program to cut and process the metal foil-shaped brazing filler metal 3; laser cutterIn cutting, the metal foil-like brazing material 3 is melted by laser heating, and then a non-oxidizing gas (Ar, He, N) is blown through a nozzle coaxial with the laser beam2Etc.) by means of strong pressure of the non-oxidizing gas to discharge the liquid metal, thereby forming a notch. The high-power-density laser beam is utilized to irradiate the metal foil-shaped brazing filler metal 3, so that the metal foil-shaped brazing filler metal 3 is quickly heated to the vaporization temperature and evaporated to form holes, and the holes continuously form slits with narrow widths along with the movement of the light beam to the material, thereby completing the cutting of the metal foil-shaped brazing filler metal 3. The invention adopts laser cutting, the laser beam is focused into a very small light spot, the focus position reaches very high power density, the heat input by the light beam far exceeds the part reflected, conducted or diffused by the material, the metal foil brazing filler metal 3 is quickly heated to the vaporization degree, and the holes are formed by evaporation. Along with the relative linear movement of the laser beam and the metal foil-shaped brazing filler metal 3, the hole continuously forms a slit with a narrow width, the trimming edge is slightly affected by heat, and the metal foil-shaped brazing filler metal 3 basically does not deform, so that the cutting precision is high, and the cutting requirement of the metal foil-shaped brazing filler metal 3 can be met;
s4: closing the laser cutting equipment, taking down the brazing filler metal placing mechanism, tearing off the adhesive tape, putting the supporting base plate 1 and the metal foil-shaped brazing filler metal 3 into hot water for soaking, and then gradually taking down the cut and formed metal foil-shaped brazing filler metal 3 from the supporting base plate 1; the individual edge positions can be cut apart along the plane of the support base 1 with a blade;
step S5: the clean supporting baseplate 1 that washs dries for subsequent use to realize the reuse of placing the mechanism.
Further, the size of the supporting bottom plate 1 is slightly larger than that of the metal foil-shaped brazing filler metal 3 to be cut, so that the cut surface area of the metal foil-shaped brazing filler metal 3 is provided with the vent holes 2.
The placing mechanism of the metal foil-shaped brazing filler metal 3 of the present invention is based on the existing general laser cutting equipment, and is used to realize the laser cutting processing of the large-format metal foil-shaped brazing filler metal 3 as shown in fig. 2. The grade of the metal foil-shaped brazing filler metal 3 processed in the embodiment is AlSiMg11.5-1.5 (the main components and the content are as follows: Si: 11.5% +/-0.8%, Mg: 1.5% +/-0.5%, and the balance is Al), ternary eutectic components, and the melting point is as follows: the solidus line is 577 ℃, the liquidus line is 580 ℃, the metal foil-shaped brazing filler metal 3 with a simple shape is directly cut by a blade in the industry; the metal foil brazing filler metal 3 with a complex shape is flatly laid on a metal substrate, the rest parts are pressed by covering a metal plate with the thickness of about 3mm, pins are arranged according to the shape of a part for fixing, the preparation time is long, the part can be basically processed only in a single piece, a fine sharp cutter is selected during processing, the rotating speed is high, and the laser equipment is a pass-through type precision laser cutting machine tool and is usually used for blanking or directly forming a metal sheet. Because the thickness of the metal foil brazing filler metal 3 is not large, the strength of the metal foil brazing filler metal is not enough to support the cutting process, and the basic shape of the working table of the laser cutting machine tool is the shape of a radiating fin with larger intervals, if the metal foil brazing filler metal is directly placed on the working table of the laser cutting machine tool for processing, the blowing force of air flow for cutting can enable the metal foil brazing filler metal 3 to be displaced, deformed or even blown away, therefore, the invention specially adopts a placing mechanism to bond and fix the metal foil brazing filler metal 3, and then places the supporting base plate 1 on the working table of the laser cutting machine tool, thereby facilitating the processing of the metal foil brazing filler metal 3.
The placing mechanism of the metal foil-shaped brazing filler metal 3 is simple in structure and convenient to operate, placing and taking-down operations of the large-width metal foil-shaped brazing filler metal 3 are simple, cutting quality and machining efficiency of the large-width metal foil-shaped brazing filler metal 3 are improved, the problems that efficiency is low in the milling process and the cutting cannot be conducted due to the fact that cutting power and cutting stroke are small in laser engraving equipment are avoided, efficient and stable production of civil aviation communication devices is guaranteed, and the placing mechanism has good use value and popularization value.
It is to be understood that the foregoing are many different embodiments or examples of the different features of the present embodiments. Specific examples of components and arrangements are described above to simplify the illustrative embodiments. These are, of course, merely examples and are not intended to limit the embodiments, and for example, device dimensions are not limited to the ranges or values disclosed, but may depend on processing conditions and/or desired properties of the device. Moreover, the formation of a first feature over or on a second feature in the description that follows may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features may be formed interposing the first and second features, such that the first and second features may not be in direct contact, although the various features may be drawn arbitrarily to varying proportions for simplicity and clarity of illustration.
Spatially relative terms, such as "under," "below," "lower," "above," "upper," and the like, may be used herein to describe one element or feature's relationship to another element or feature(s) as illustrated in the figures. These spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be oriented in different ways (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. Mechanism of placing of big breadth metal foil form brazing filler metal, its characterized in that, should place the mechanism and include supporting baseplate and bonding structure, wherein:
the support bottom plate is distributed with vent holes for allowing cutting gas of laser processing equipment to pass through the vent holes and be discharged during laser processing;
the bonding structure comprises a hot-melt adhesive for bonding the metal foil-shaped brazing filler metal, so that the metal foil-shaped brazing filler metal is fixed on the supporting base plate.
2. The mechanism of claim 1, wherein the support base is a metal plate with a light reflection rate of greater than 95%.
3. The mechanism of claim 1, wherein the support base is made of copper.
4. The large format metal foil brazing filler metal placing mechanism according to claim 1, wherein the vent holes are elongated, and a plurality of vent grooves perpendicular to the vent holes are formed in the support base plate, and each vent groove communicates with two vent holes.
5. The large format metal foil brazing filler metal placement mechanism according to claim 1, wherein the bonding structure further comprises an adhesive tape for reinforcing the edges of the metal foil brazing filler metal on the support base.
6. The mechanism of claim 1, wherein the hot melt adhesive is polyvinyl alcohol.
7. The laser cutting method of the large-width metal foil brazing filler metal is characterized by being realized by using the placing mechanism of any one of claims 1 to 6, wherein the placing mechanism is placed on a working table of laser cutting equipment, the laser cutting equipment is used for processing the shape of the large-width metal foil brazing filler metal, and the specific cutting processing steps are as follows:
s1: prepressing and flattening coiled metal foil-shaped brazing filler metal, adhering a single piece of prepressed and flattened metal foil-shaped brazing filler metal to the upper surface of a supporting base plate by adopting a hot-melt adhesive, reinforcing the edge of the metal foil-shaped brazing filler metal on the supporting base plate by using an adhesive tape, and placing the supporting base plate on a working table of laser cutting equipment;
s2: opening a laser cutting device, presetting the shape processing program of the metal foil-shaped brazing filler metal in the laser cutting device, adjusting laser processing parameters, and adopting non-oxidizing gas as cutting gas;
s3: operating a processing program, and cutting and processing the metal foil-shaped brazing filler metal;
s4: and closing the laser cutting equipment, taking down the brazing filler metal placing mechanism, tearing off the adhesive tape, putting the supporting base plate and the metal foil-shaped brazing filler metal into hot water for soaking, and gradually taking down the cut and formed metal foil-shaped brazing filler metal from the supporting base plate.
8. The laser cutting method for large-format metal foil brazing filler metal according to claim 7, wherein the cutting gas is an inert gas.
9. The laser cutting method for large-format metal foil brazing filler metal according to claim 7, further comprising step S5: the supporting bottom plate is cleaned and aired for later use, so that the placing mechanism can be reused.
10. The laser cutting method of large-format metal foil brazing filler metal according to claim 7, wherein the size of the supporting base plate is slightly larger than that of the metal foil brazing filler metal to be cut, so as to ensure that the cut surface area of the metal foil brazing filler metal has vent holes.
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| CN108817686A (en) * | 2018-07-03 | 2018-11-16 | 京东方科技集团股份有限公司 | Substrate placing stage and cutter device |
| CN209910123U (en) * | 2019-01-17 | 2020-01-07 | 天津科技大学 | Super-hydrophilic air conditioner radiating fin and production device thereof |
| CN110877164A (en) * | 2019-12-30 | 2020-03-13 | 无锡昆仑富士仪表有限公司 | Laser cutting fixture for metal thin film |
| CN111482713A (en) * | 2020-04-28 | 2020-08-04 | 上海沪航卫星科技有限公司 | Laser cutting method of low-melting-point low-strength metal film |
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