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How to cut the film with a metal laser cutting machine

by:VENTECH     2022-02-23

What is tape cutting? How does the laser cutting machine cut products with film, is it front cutting or reverse cutting?

First of all, what is tape cutting? In order to ensure the surface finish of metal materials, many metal products will be coated, which is our common metal material with film. For example, the more common coated metals in our lives are doors and windows, kitchen utensils and other materials.

At present, based on the characteristics of the fiber laser cutting machine, Hongte Laser has carried out many experiments and improvements, and on this basis, has systematically studied the micro-physical process of the fiber cutting process. After repeated testing and research, gradually Mastered the process method of using laser to cut film-coated stainless steel, and integrated other process improvements to form the 'metal laser cutting machine cutting film-coated stainless steel process technology' So how to cut products with film? Next, the editor will come to popularize it for everyone.

Understand the stainless steel protective film

Stainless steel film is used to protect the processed stainless steel surface when the stainless steel plate is transported and further produced, so the stainless steel film is also called stainless steel protective film .

Main classification of stainless steel protective film

1. Classification by material: PVC film, PE film, PET film, etc.

2 . Classified by purpose: laser film, stretch film, color plate base film, ordinary stainless steel protective film, etc.

3. Classification by thickness: 3C/5C/7C/10C, u200bu200betc. on behalf of 30mirco/50mirco/70mirco/100mirco, etc.

4. Classification by appearance: blue film, black and white film, fish Head film, KB film, customized printing film, etc.

5. Classification by origin: domestic film, imported film

6. Classification by paste: oil film, water film, self Mucosa, electrostatic film, etc.

How to cut single-sided stainless steel with film

1. If you do not have to cut with film, you can tear the film. Under the conditions, the first choice is to tear off the protective film before cutting.

2. Direct cutting When the protective film is pasted with fiber laser film, it can be cut directly, and the parameters are basically the same as those without film. (Note: Laser film is divided into fiber laser film and carbon dioxide laser film. The two are different. The requirement of fiber laser film is a black and white film with a viscosity of 120 or more and a thickness of 0.05-0.08mm, but not all black and white films. The films are all fiber laser films).

3. Evaporate the film. When the protective film is an ordinary film or a carbon dioxide laser film and the viscosity is appropriate, the method of evaporation can be used to remove the film, that is, first use a lower power laser to burn off the film, and then Make a cut.

4. Cut the film face down. We can also put the film on the back for cutting. The advantage of this method is that it does not pick up the film. Almost any film can be cut by this method, and the film will not Was blown up or fringed. But there are also disadvantages, that is, because the film is on the back, it will hinder the process of slagging, resulting in slag on the back. (The amount of slag is generally determined by the thickness and viscosity of the protective film)

How does the metal laser cutting machine cut the double-sided laminated sheet

The difficulty of cutting the laminated sheet is because of its cutting head It can only be cut from the top of the board downwards. The protective film on the board has no effect during the cutting process. However, due to the film on the bottom of the board, the cutting residues generated during the cutting process cannot be completely dropped, and these residues will It directly affects the cutting effect of the board, causing the board to fail to cut through or there are big burrs after cutting, but if all the film under the board is torn off, scratches will appear under the board.

So, what methods are there to prevent the peeling of the film from occurring? The specific method is:

1. Draw an auxiliary cutting diagram that matches the actual cutting diagram.

The specific method is to mirror the actual cutting diagram, and then the auxiliary cutting diagram can be directly obtained.

2. Measure the position and maximum offset of the film to be torn off.

In theory, use the auxiliary cutting diagram to use laser etching on the top of the sheet to etch away the protective film at the cutting position, and then just turn the sheet over and cut directly. However, in the actual cutting process, due to the influence of the laser positioning error and the sheet shape error, the cutting position of the front and back sides of the sheet cannot be overlapped. Therefore, when the front side is etched, the accurate offset must be measured and the protective film at the offset position must be torn off.

3. Draw cutting drawings and auxiliary cutting drawings.

The cutting drawing can be drawn directly according to the shape of the workpiece. To assist the cutting drawing, first mirror the actual cutting drawing, and then offset with the set error value.

4. Typesetting of laser cutting diagrams.

It is necessary to typeset the auxiliary cutting drawings first. Secondly, mirror the layout drawing of the auxiliary cutting drawing, remove the etching line, and only keep the actual cutting drawing.

5. Laser cutting.

First, make a pattern to etch, and then tear off the protective film at the position of the laser cut. After tearing off the protective film, turn the steel plate over, and then cut the workpiece.

The editor recommends that for material and cutting requirements, improving the cutting process can not only improve work efficiency, but also save a lot of unnecessary material consumption!

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