CN111482713A - Laser cutting method of low-melting-point low-strength metal film - Google Patents
Laser cutting method of low-melting-point low-strength metal film Download PDFInfo
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- CN111482713A CN111482713A CN202010348955.1A CN202010348955A CN111482713A CN 111482713 A CN111482713 A CN 111482713A CN 202010348955 A CN202010348955 A CN 202010348955A CN 111482713 A CN111482713 A CN 111482713A
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- metal
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- metal film
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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
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
- B23K26/1462—Nozzles; Features related to nozzles
-
- 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
Abstract
The laser cutting method of the low-melting-point low-strength metal film comprises the following steps: generating cutting size data of the metal gasket parent metal according to the size of the metal film; calibrating an absolute zero point of the laser nozzle; fixing a metal liner base material, and finishing cutting of the metal liner according to the cutting size data of the metal liner; flatly paving the metal film base metal on a metal liner, returning a laser nozzle to an absolute zero point, resetting working parameters of a laser, and cutting the metal film base metal according to the cutting size data of the metal film; and stripping the metal film to obtain the finished product of the metal film. According to the laser cutting method, the metal gasket with the specific thickness is selected, the distance between the edge of the metal gasket and the cutting point on the metal film is set, the appropriate laser power and the air pressure of the nozzle air flow are set, and the same zero point cutting of the gasket and the metal film is carried out, so that the processing efficiency is greatly improved while the processing precision is ensured, the precision and the efficiency are both considered, and the blank of the laser cutting in the field is filled.
Description
Technical Field
The invention belongs to the technical field of laser cutting, relates to a processing method of special materials, such as special metal films, soft solder for welding radiators and other low-melting-point and low-strength materials under the conditions of complex requirements and requirements on precision and efficiency in specific occasions, and particularly relates to a laser cutting method of a low-melting-point and low-strength metal film.
Background
The low-melting-point and low-strength metal film, the solder for welding the radiator and the like have some special characteristics, such as:
the material has strong ductility and low hardness, can be extruded and deformed or torn by slight external force, and even the fingernails of people can be easily cut;
the wetting quality is strong, the extrusion force is slightly larger, and the material is easy to adhere with other materials;
the melting point is low, and the hot processing process is easy to cause the unformed edge of the processed edge or the collapse of the non-processed surface.
The existing processing methods for such materials are as follows:
the manual knife engraving method finishes the engraving of the detail size of the film by the real-time trimming of technicians, has high requirements on the technology and responsibility of the technicians, has high error probability when processing a complex structure, consumes long time and has low yield;
the engraving plate and knife die method can meet the precision requirement, has better efficiency than a manual engraving method, but is easy to stretch and crack products in the die stripping stage due to the characteristics of low strength, high ductility and easy adhesion of materials. Meanwhile, the cutting die is long in period and is not suitable for processing materials with short period, small batch and complex structure;
a plate press working method which performs integrated working by pressing a film between two metal materials. Compared with the two methods, the method can obtain better quality, but the whole processing period is still longer, and cutting fluid is needed to be used in the processing process, so that the product is polluted and needs to be cleaned for the second time.
The laser cutting principle is that the material is melted through by laser, and the material melted in the slot is blown away by gas, so that the cutting is finished. Although laser cutting can achieve both precision and efficiency, the material with low melting point and low strength cannot be cut by the existing laser cutting method because:
the material has low melting point and good heat dissipation performance, and when the slot position is melted, the base material is easy to melt at the same time, so that the base material is not deformed due to collapse;
the material has low hardness, and the material is easy to deform when blown by air pressure, so that the size is damaged.
Disclosure of Invention
The invention aims to provide a laser cutting method of a low-melting-point and low-strength metal film, which can give consideration to both precision and efficiency, so as to fill the blank of laser cutting in the field.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the laser cutting method of the low-melting-point low-strength metal film comprises the following steps:
s1: selecting a metal liner base material with a certain thickness according to the size data of the metal film and generating cutting size data of the metal liner base material, so that an area A to be cut on the metal liner base material and an area B to be cut off on the metal film base material are corresponding similar graphs, and if the area B and the area A are overlapped, the width of the part of the area A, which exceeds the area B, is w;
s2: calibrating an absolute zero point of the laser nozzle;
s3: fixing a metal gasket base material, cutting the metal gasket base material according to the cutting size data of the metal gasket, and cutting off the area A to obtain the metal gasket;
s4: keeping the fixed state of the metal gasket, flatly paving the metal film base material on the metal gasket, and enabling the area B to be cut to be superposed with the original area A, wherein the area B is positioned in the original area A and the distance from the edge of the area B to the edge of the original area A is w;
s5: returning the laser nozzle to the absolute zero point, resetting the working parameters of the laser, and cutting the metal film base metal according to the cutting size data of the metal film;
s6: and after cutting, stripping the metal film to obtain a finished metal film.
As a preferable technical scheme, the thickness of the metal gasket is not more than 0.2 mm.
As a preferred technical solution, the range of w is: w is more than or equal to 0.1mm and less than or equal to 0.2 mm.
As a preferable technical solution, in the step S5, after the operating parameters of the laser are reset, the power of the laser is 100W, and the frequency is 500 Hz.
As a preferred technical solution, in the step S5, after the operating parameters of the laser are reset, the air pressure of the laser nozzle air flow is 0.1 bar.
As a preferred technical solution, in step S5, the working parameters are specifically: the laser power was 100W, the frequency was 500Hz, and the nozzle gas pressure was 0.1 bar.
Compared with the prior art, the invention has the beneficial effects that:
the laser cutting method of the low-melting-point low-strength metal film simultaneously plays a supporting role and a heat dissipation role according to the metal gasket preformed by the metal film;
by regulating and controlling the distance between the edge of the metal liner and the cutting position of the metal film, the laser beam is prevented from being too close to the edge of the liner to cause too fast heat dissipation and form a molten pool, and the insufficient heat dissipation caused by too far away from the edge of the liner is avoided;
by selecting a metal gasket with a certain thickness, the size deviation caused by the reverse deflection of the airflow is avoided;
by cutting the liner and the metal film at the same zero point, the processing efficiency is improved, the processing precision is ensured, the precision and the efficiency are both considered, and the blank of laser cutting in the field is filled.
Drawings
FIG. 1 is a schematic diagram showing the operation of a laser cutting method of a low-melting-point low-strength metal thin film in example 1 of the present invention;
FIG. 2 is a low melting point low strength metal film product of example 2 of the present invention;
in fig. 1 and 2 above, 1 metal pad; 2, a metal film base material; 3 laser nozzle.
The specific implementation mode is as follows:
the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, the laser cutting method of the low-melting-point low-strength metal thin film comprises the following steps:
a. selecting a metal liner base material with a certain thickness according to the size data of the metal film and generating cutting size data of the metal liner base material, enabling an area A to be cut on the metal liner base material and an area B to be cut on the metal film base material 2 to be corresponding similar graphs, and enabling the width of the part, exceeding the area B, of the area A after the area B and the area A are overlapped to be w;
b. calibrating the absolute zero point of the laser nozzle 3;
c. fixing a metal gasket base material, cutting the metal gasket base material according to the cutting size data of the metal gasket, and cutting off the area A to obtain a metal gasket 1;
d. keeping the fixed state of the metal gasket 1, paving the metal film base material 2 on the metal gasket 1, and enabling the area B to be cut to coincide with the original area A, wherein the area B is positioned in the original area A and the distance between the edge of the area B and the edge of the original area A is w;
e. the laser nozzle 3 returns to the absolute zero point, the working parameters of the laser are reset, and the metal film base metal 2 is cut according to the cutting size data of the metal film;
f. and after cutting, stripping the metal film to obtain a finished metal film.
It should be noted that the thickness of the selected metal gasket base material is generally not more than 0.2mm, and the thinner the metal gasket base material, the better, but it is selected in consideration of the required supporting strength in combination with the shape of the metal thin film base material 2 and the actual supporting position. The range of w is generally 0.1mm to 0.2mm, and the thickness of the metal pad is specifically set with reference to the thickness of the metal pad (the thickness of the metal pad and the width of w are approximately 1: 1). When cutting the base metal material 2, the power and frequency of the laser are also reduced to a proper range, the gas pressure of the nozzle gas flow is reduced to a certain intensity, if the gas flow is large, the base metal material 2 is peeled from the metal liner 1, and if the gas flow is too small, the molten pool cannot be blown off.
Example 2
This example uses the method of example 1 to produce a low-melting-point, low-strength metal film having a uniform array of large and small spaced-apart through-holes with a melting point of 160 ℃ and a hardness of HM1.2, as shown in fig. 2. According to the characteristics of the material, a metal gasket base material with the thickness of 0.2mm is selected to be processed into the metal gasket 1, the thickness of the metal gasket 1 cannot be too thick, and the too thick metal gasket can deflect airflow in the opposite direction, so that the deviation of the processing size is caused. The processed metal liner 1 is provided with through hole arrays with the same sizes as the metal film, and when the metal film base material 2 is placed on the metal liner, the through hole arrays on the metal liner 1 correspond to the through hole arrays to be processed on the metal film base material 2 one by one. The distance between the edge of each through hole on the metal liner 1 and the cutting position of each through hole on the metal film base material is uniform and 0.2mm, and the significance is that the laser beam is not too close to or too far away from the edge of the metal liner 1, the too close laser beam can cause the too fast heat dissipation and can not form a molten pool, and the too far laser beam can cause the limited heat dissipation effect of the metal liner 1, so that the edge forming is poor. When the working parameters of the laser are reset, the power and the frequency of the laser are 100W and 500Hz, and the air pressure of the air flow of the nozzle is 0.1 bar.
After the metal film product is processed, the processing error is less than 0.2mm through measurement, the edges of all the through holes are smooth and have no adhesion, and the corresponding technical requirements are met.
The inventor determines the optimal combination setting of the parameters through a large number of experiments, creatively uses the metal liner as the supporting component and the heat dissipation component, and performs the same zero point cutting on the metal liner parent metal and the metal film parent metal, successfully realizes the application of the laser cutting technology in the processing of the low-melting-point low-strength metal film material, not only can ensure the processing precision, but also can greatly improve the processing efficiency, and fills the application blank of the laser cutting in the field.
Claims (5)
1. The laser cutting method of the low-melting-point low-strength metal film is characterized by comprising the following steps of:
s1: selecting a metal liner base material with a certain thickness according to the size data of the metal film and generating cutting size data of the metal liner base material, so that an area A to be cut on the metal liner base material and an area B to be cut off on the metal film base material are corresponding similar graphs, and if the area B and the area A are overlapped, the width of the part of the area A, which exceeds the area B, is w;
s2: calibrating an absolute zero point of the laser nozzle;
s3: fixing a metal gasket base material, cutting the metal gasket base material according to the cutting size data of the metal gasket, and cutting off the area A to obtain the metal gasket;
s4: keeping the fixed state of the metal gasket, flatly paving the metal film base material on the metal gasket, and enabling the area B to be cut to be superposed with the original area A, wherein the area B is positioned in the original area A and the distance from the edge of the area B to the edge of the original area A is w;
s5: returning the laser nozzle to the absolute zero point, resetting the working parameters of the laser, and cutting the metal film base metal according to the cutting size data of the metal film;
s6: and after cutting, stripping the metal film to obtain a finished metal film.
2. The method of claim 1, wherein the metal liner has a thickness of no greater than 0.2 mm.
3. The method of claim 1, wherein the range of w is: w is more than or equal to 0.1mm and less than or equal to 0.2 mm.
4. The method according to claim 1, wherein in step S5, after the operation parameters of the laser are reset, the power of the laser is 100W and the frequency is 500 Hz.
5. The method of claim 1, wherein in step S5, after the operation parameters of the laser are reset, the air pressure of the laser nozzle air flow is 0.1 bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010348955.1A CN111482713A (en) | 2020-04-28 | 2020-04-28 | Laser cutting method of low-melting-point low-strength metal film |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010348955.1A CN111482713A (en) | 2020-04-28 | 2020-04-28 | Laser cutting method of low-melting-point low-strength metal film |
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| CN111482713A true CN111482713A (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010348955.1A Pending CN111482713A (en) | 2020-04-28 | 2020-04-28 | Laser cutting method of low-melting-point low-strength metal film |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112192038A (en) * | 2020-09-23 | 2021-01-08 | 湖北三江航天险峰电子信息有限公司 | Large-breadth metal foil-shaped brazing filler metal placing mechanism and laser cutting method using same |
| CN116765636A (en) * | 2023-08-18 | 2023-09-19 | 苏州惠得利电子材料有限公司 | Screen protection film and processing device thereof |
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| CN207343978U (en) * | 2017-10-20 | 2018-05-11 | 四川新远宏机械设备有限公司 | A kind of laser cutting machine for being used to cut thin plate |
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| 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 |
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2020
- 2020-04-28 CN CN202010348955.1A patent/CN111482713A/en active Pending
Patent Citations (5)
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| CN203509367U (en) * | 2013-07-04 | 2014-04-02 | 山东辛辛那提管道有限公司 | Steel belt welding device during pipe plastic coating |
| WO2016012007A1 (en) * | 2014-07-22 | 2016-01-28 | Helmholtz-Zentrum Berlin Für Materialien Und Energie Gmbh | Method for producing a rear-side contact system for a silicon thin-layer solar cell |
| CN207343978U (en) * | 2017-10-20 | 2018-05-11 | 四川新远宏机械设备有限公司 | A kind of laser cutting machine for being used to cut thin plate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112192038A (en) * | 2020-09-23 | 2021-01-08 | 湖北三江航天险峰电子信息有限公司 | Large-breadth metal foil-shaped brazing filler metal placing mechanism and laser cutting method using same |
| CN116765636A (en) * | 2023-08-18 | 2023-09-19 | 苏州惠得利电子材料有限公司 | Screen protection film and processing device thereof |
| CN116765636B (en) * | 2023-08-18 | 2023-11-24 | 苏州惠得利电子材料有限公司 | Processing device for screen protection film |
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Application publication date: 20200804 |