TWI661481B - Laser cutting method and apparatus thereof - Google Patents

Abstract

A laser cutting method and a device thereof. The cutting method mainly cuts metal foil through cutting, coating, cutting and other steps in sequence, and simultaneously holds a metal foil to be cut with a clamping jig, and then The scanning head unit above the holding jig produces a laser beam for cutting and starts cutting. During the cutting process, the upper auxiliary blowing device and the lower auxiliary blowing device are used to spray cooling gas towards the metal at the same time. Foil, and during the cutting process, a thermal imager is also used to monitor the temperature of the metal foil, and the air output of the upper auxiliary blowing device and the lower auxiliary blowing device is adjusted according to the temperature change of the metal foil.

Description

Laser cutting method and equipment

The invention relates to a cutting method and a device thereof; more specifically, it relates to a laser cutting method and a device for cutting a metal foil.

Generally, laser processing machines on the market are widely used in the marking, engraving, micro-machining, cutting and drilling of semiconductors, metals, ceramics, glass and other materials. However, once these laser processing machines are encountered, they need to be performed on metal foil. Processing, it will be subject to the requirements of the laser processing machine itself for the thickness of the metal foil and the laser cutting line width, which will cause a lot of restrictions, making the processing quality of the metal foil generally poor or even impossible to process.

In view of this, the applicant of this case based on his many years of R & D experience in related fields, conducted in-depth discussions on the aforementioned shortcomings, and actively sought solutions based on the aforementioned needs. After a long period of hard research and multiple tests, he completed this invention.

The main purpose of the present invention is to provide a method and a device capable of cutting a polygon, a circle or a spiral on a metal foil by using a laser beam.

In order to achieve the above-mentioned object, the laser cutting method of the present invention is made by the following steps: A. Cutting step: using a laser beam of a laser cutting device to cut the shape of a component on a metal foil, There is still more than one uncut micro-link between the component and the metal foil. B. Laminating step: Take out the metal foil processed by the cutting step from the laser cutting equipment, and cover one side of the metal foil with a carrier film. C. Cutting step: Put the metal foil that has been coated back into the laser cutting equipment, and then use the laser beam to cut the micro-connection between the element and the metal foil, and the component after the micro-connection is still adhered to On the carrier film, the component is finally removed from the carrier film to complete the laser cutting process.

The laser cutting device of the present invention includes a scanning head unit, a clamping jig, a displacement mechanism, an upper auxiliary blowing device, a lower auxiliary blowing device, and a thermal imager.

The scanning head unit is used for manufacturing and emitting a laser beam, and uses the laser beam to cut a metal foil.

The clamping jig is arranged below the scanning head unit and is used for clamping the metal foil to be cut. The clamping jig is composed of an upper pressing jig and a lower pressing jig, and the upper pressing jig and The lower pressing jigs are provided with pillars protruding and used for pressing the metal foil, so that the metal foil is vacated when being clamped.

The shifting mechanism is connected with the clamping jig, and the shifting mechanism is used for fixing the clamping jig and enabling the clamping jig to move in a horizontal direction.

The upper auxiliary air blowing device is disposed between the clamping jig and the scanning head unit. The upper auxiliary air blowing device blows cooling gas from the top to the surface of the metal foil, thereby controlling the surface temperature of the metal foil. Within the proper range.

The lower auxiliary air blowing device is provided inside the displacement mechanism. The lower auxiliary air blowing device blows cooling gas from the bottom toward the surface of the metal foil, thereby controlling the surface temperature of the metal foil within an appropriate range.

The thermal imager is arranged in a proper position in the laser cutting equipment that can irradiate the metal foil. The thermal imager is used to monitor the surface temperature change when cutting the metal foil and report the temperature change information to the laser cutting equipment. This helps to adjust the blowing volume of the upper auxiliary blowing device and the lower auxiliary blowing device.

The laser cutting method and its equipment of the present invention have the following advantages: 1. The micro-links reserved during the cutting of the metal foil and the use of the carrier film prevent the occurrence of bulk materials during the cutting and cutting process. 2. The combination of the upper auxiliary air blowing device, the lower auxiliary air blowing device and the thermal imager can keep the metal foil at the optimal cutting temperature during the cutting process.

It is expected that the purpose, effects, features, and structure of the present invention can be understood in more detail. The preferred embodiments are described below with reference to the drawings.

First please refer to FIG. 1 and FIG. 2. FIG. 1 is a schematic flowchart of a laser cutting method according to the present invention, and FIG. 2 is a schematic cross-sectional view of a laser cutting device according to the present invention.

The laser cutting method 1 of the present invention is made by the following steps: A. Cutting step 11: The laser beam of the laser cutting device 2 is used to cut the shape of the component on the metal foil 3, and the cut component and the There is still one or more uncut micro-links between the metal foils 3, and the micro-links can keep the components connected to the metal foils 3, so that no loose materials will occur during the cutting process. Among them, The laser beam used in the cutting step 11 may be long-pulsed with a pulse width of 200 ns or more. B. Film coating step 12: Take out the metal foil 3 treated by the cutting step 11 from the laser cutting device 2 and cover the metal foil 3 with a carrier film. C. Cutting step 13: Put the metal foil 3 covered with the carrier film back into the laser cutting device 2 and use the laser beam to cut the micro-connection between the element and the metal foil 3 to cut the micro-connection. The component will still be attached to the carrier film. Finally, the component will be removed from the carrier film to complete the laser cutting process.

In addition, the laser cutting device 2 of the present invention includes a scanning head unit 21, a holding jig 22, a displacement mechanism 23, an upper auxiliary blowing device 24, a lower auxiliary blowing device 25, and a thermal imager 26.

The scanning head unit 21 is used to manufacture and emit a laser beam, and use the laser beam to cut the metal foil 3, and the laser beam may be a long-pulsed laser with a pulse width of 200 ns or more. .

The clamping jig 22 is arranged below the scanning head unit 21 and is used to clamp the metal foil 3 to be cut. The clamping jig 22 is composed of an upper pressing jig 221 and a lower pressing jig 222. The upper pressing jig 221 and the lower pressing jig 222 are both provided with pillars that are used to press the metal foil 3, so that the metal foil 3 is vacated when it is clamped.

The displacement mechanism 23 is connected to the clamping jig 22, and the displacement mechanism 23 is used for fixing the clamping jig 22 and enabling it to move in a horizontal direction.

The upper auxiliary air blowing device 24 is disposed between the clamping jig 22 and the scanning head unit 21, and the upper auxiliary air blowing device 24 blows cooling gas from the top to the surface of the metal foil 3, so as to blow the metal The surface temperature of foil 3 is controlled within an appropriate range. Among them, the upper auxiliary blowing device 24 can freely adjust the blowing angle, position and air volume, and the upper auxiliary blowing device 24 can blow out the gas that is concentrated and then diffused. .

The lower auxiliary air blowing device 25 is provided inside the shifting mechanism 23. The lower auxiliary air blowing device 25 blows cooling gas from below to the surface of the metal foil 3, thereby controlling the surface temperature of the metal foil 3 to be appropriate. In addition, the air outlet of the lower auxiliary air blowing device 25 is the best choice with a horn-shaped appearance, and the horn-shaped air outlet can effectively blow the cooling gas to the surface of the metal foil 3.

The thermal imager 26 is set in a proper position in the laser cutting device 2 of the present invention and can irradiate the metal foil 3. The thermal imager 26 is used to monitor the surface temperature change when cutting the metal foil 3 and report the temperature change information. The laser cutting device 2 is used to adjust the blowing volume of the upper auxiliary blowing device 24 and the lower auxiliary blowing device 25.

Details of the embodiments of the present invention and related reference drawings are as follows:

Please refer to FIG. 3 in combination with FIG. 2. FIG. 3 is a schematic diagram (1) of implementation of the laser cutting method of the present invention.

In the following description, the present invention is described using a circle cut on a copper foil.

As shown in step 41, before cutting the circle, the copper foil needs to be clamped by the clamping jig 22, and the portion of the copper foil to be cut is suspended in the air.

As shown in step 42, after confirming that the clamping jig 22 clamps the copper foil, the scanning head unit 21 can be turned on to use a laser beam and cooperate with the movement of the shift mechanism 23 to cut out a circular shape on the copper foil. Appearance, and during the cutting process, the upper auxiliary blowing device 24 and the lower auxiliary blowing device 25 are used to blow the cooling gas toward the copper foil.

As shown in step 43, in addition, during the cutting process, the thermal imager 26 is simultaneously activated to monitor the surface temperature change during cutting of the copper foil and report the temperature change information to the laser cutting device 2.

As shown in step 44, if the thermal imager 26 detects that the surface temperature of the copper foil is higher than the optimal cutting temperature when cutting the copper foil, the laser cutting device 2 will automatically enhance the upper auxiliary blowing device 24 and the lower auxiliary blowing device. The blowing amount of the air device 25 reduces the temperature of the surface of the copper foil to an appropriate range.

As shown in step 45, after the cutting is completed, there is still one or more uncut micro-connections between the circular component and the copper foil, so that the component will not fall off directly from the copper foil.

Please refer to FIG. 4 in combination with FIG. 2. FIG. 4 is a schematic diagram (2) of implementation of the laser cutting method of the present invention.

As shown in step 51, the cut copper foil is then removed from the clamping jig 22, and a carrier film is coated on one side of the copper foil, so that the carrier film simultaneously covers the copper foil, components, and micro-connections. Office.

As shown in step 52, return the copper foil covered with the carrier film to the holding jig 22, and start the scanning head unit 21, the upper auxiliary blowing device 24, and the lower auxiliary blowing device 25 again, and prepare for the final Cutting.

As shown in step 53, the laser beam generated by the scanning head unit 21 is used again to cut off the micro-connection between the component and the copper foil, so that the component is officially separated from the copper foil. In addition, although the component has been separated from the copper foil, but The carrier film overlaid on the copper foil will still fix the component in its original position, so that the component will not fall off the copper foil directly after the micro-connection is cut.

As shown in step 54, the circular element is finally removed from the carrier film to complete the process of cutting the circle on the copper foil.

To sum up, the laser cutting method and equipment of the present invention have the following advantages: 1. One or more micro-links are reserved when cutting metal foil, and the supporting film covering the surface of the metal foil is used for cutting and cutting. No bulk material will occur in the process. 2. At the same time, the upper auxiliary blowing device and the lower auxiliary blowing device are used together with a thermal imager, so that the metal foil can be maintained at the optimal cutting temperature during the cutting process.

Therefore, the present invention has excellent progress and practicability in similar products. At the same time, after reviewing domestic and foreign technical information on such structures, it was found that no identical or similar structure exists before the application in this case. Patent applications that have met the "creative", "suitable for industrial use", and "progressive" requirements should be filed in accordance with the law.

However, the above are only preferred embodiments of the present invention. For example, any other equivalent structural changes applied to the description of the present invention and the scope of patent application should be included in the scope of patent application of the present invention.

‧‧‧Laser cutting method

11‧‧‧ cutting steps

12‧‧‧ Laminating steps

13‧‧‧ cutting steps

2‧‧‧laser cutting equipment

21‧‧‧scan head unit

22‧‧‧ holding fixture

221‧‧‧Up Pressure Fixture

222‧‧‧Pressing down fixture

23‧‧‧shift mechanism

24‧‧‧ Upper auxiliary blowing device

25‧‧‧ Lower auxiliary blowing device

26‧‧‧ Thermal Camera

‧‧‧ metal foil

41, 42, 43, 44, 45‧‧‧ steps

51, 52, 53, 54‧‧‧ steps

Figure 1: Schematic diagram of the laser cutting method of the present invention; Figure 2: Schematic sectional view of the laser cutting device of the present invention; Figure 3: Schematic diagram of the laser cutting method of the present invention (1); Figure 4: Implementation of the laser cutting method of the present invention Schematic (two).

no.

Claims (10)

A laser cutting method includes the following steps: A. Cutting step: the shape of a component is cut on a metal foil by using a laser beam of a laser cutting device, and there is still a space between the component and the metal foil after cutting Uncut micro-links, so that the components are still connected to the metal foil; B. Laminating step: take out the metal foil treated by the cutting step from the laser cutting equipment, and cover the metal foil with a carrier film on one side; C. Cutting step: Put the metal foil that has been coated back into the laser cutting equipment, and use the laser beam to cut the micro-connection between the component and the metal foil, and the component after the micro-connection is still adhered to On the carrier film, the component is finally removed from the carrier film to complete the laser cutting process. The laser cutting method according to item 1 of the claim, wherein there are more than one microlinks that are not cut in the cutting step. The laser cutting method according to claim 1, wherein the laser beam pulse width used in the cutting step and the cutting step is 200 ns or more. The laser cutting method according to claim 1, wherein the laser beam used in the cutting step and the cutting step is long-pulsed. A laser cutting device includes a scanning head unit, a clamping jig, a displacement mechanism, an upper auxiliary blowing device and a lower auxiliary blowing device; the scanning head unit is used for manufacturing and emitting a laser Light beam, and use the laser beam to cut metal foil; the clamping jig is arranged below the scanning head unit, and is used to clamp the metal foil to be cut; the clamping jig is made of an upper pressure jig and The upper pressing fixture and the lower pressing fixture are provided with pillars protruding and used for pressing the metal foil, so that the metal foil is vacated when it is clamped; the displacement mechanism and the clamp The jig is connected, and the displacement mechanism is used for fixing the jig and enabling the jig to move in a horizontal direction; the upper auxiliary blowing device is disposed between the jig and the scanning head unit. The upper auxiliary air blowing device blows cooling gas to the surface of the metal foil from above to control the surface temperature of the metal foil within an appropriate range; the lower auxiliary air blowing device is disposed inside the displacement mechanism, and the lower The auxiliary blowing device blows cooling gas from below The surface of the metal foil, whereby the metal foil to the surface temperature is controlled within an appropriate range. The laser cutting device according to claim 5, wherein the laser beam pulse width used by the scanning head unit is 200 ns or more. The laser cutting device according to claim 5, wherein the laser beam used by the scanning head unit is long-pulsed. The laser cutting device according to claim 5, wherein the upper auxiliary blowing device can blow out the gas in a concentrated manner and then spread out, and the blowing angle, position and air volume can be freely adjusted. The laser cutting device according to claim 5, wherein the air outlet of the lower auxiliary blowing device is a horn-shaped design. The laser cutting device according to claim 5, wherein the laser cutting device is provided with a thermal imager.