【Phenomenon】

When cutting thin sheet materials, small changes in the focus position will affect the processing performance. In the ultra-thin plate cutting with a thickness of less than 0.1mm, if the support of the material uses a common cone-shaped or slat-shaped support, it will become more difficult to stably support the processed material.

【Reason】
Under the condition of low output power of the ultra-thin plate, a small focus deviation will cause the reflection of the laser on the surface of the material, which will seriously reduce the melting ability. Process gas pressure during cutting, material deformation under the influence of heat, etc. can cause reflections. For such ultra-thin plates, the method shown in Figure 4.9-2 can be used for processing.

【Laser Solution】

(1) Simple auxiliary tools

Use an acrylic plate or an iron plate with a thickness of 1~2mm to cut out a window slightly larger than the processed shape, and then place the ultra-thin plate
The processing material is pasted on it for cutting. However, when using this method, if the size of the processed shape is large and the center of the window
When there is a processing position in the center, it is difficult not to produce a depression, and it is more difficult to process.

(2) Honeycomb Aluminum Plate

Putting the processing material on the honeycomb aluminum plate for processing can reduce the sag of the processed object, and the focus will not deviate.
The disadvantage is that the bottom part of the material in contact with the honeycomb aluminum plate is prone to scratches or stains.

(3) Support Tool

Using the processing program, cut out a shape 1mm larger than the cut shape on the acrylic plate or iron plate, and then
The processing material is pasted on it for cutting. In this way, the support can be accurately grasped near the processed shape, which can further improve the
High processing precision.

(4) Simultaneous Cutting

Simultaneous cutting is to use acrylic board, thick paper, plywood, etc. as a support material, and paste the processed material on
Above the support material, the method of cutting together with the support material when cutting. However, it should be noted that the release of the support material
Outgassing may contaminate the bottom surface of the material being processed.

(5) Overlap Cutting

A single sheet of processed material will be dented, but if dozens of sheets are stacked, the thickness of the sheet will increase and the deformation will be reduced accordingly.
Stable machining can be realized. When overlapping materials for processing, burrs are basically generated on the bottom sheet,
At this time, the bottom plate can be considered as a waste material.