4. Concentrated perforation
Concentrated perforation, also known as pre-piercing, is a processing process, not a function of the machine itself, and its use requires the help of an automatic programming system. When cutting thicker sheets with a laser, the cutting process of each profile goes through two stages: 1. Piercing, 2. Cutting.
Conventional processing technology (point A perforation → cutting contour 1 → perforation at point B → cutting contour 2 →…), the so-called centralized perforation is to perform all the perforation processes on the entire board in advance, and then go back and perform the cutting process.
Concentrated perforation can improve processing efficiency. By adopting the centralized perforation method, the focus can be adjusted to the position suitable for perforation. After the perforation is completed, the machine is paused, and then the focus position is adjusted to the best position required for cutting; in this way, the perforation time can be shortened by more than half, greatly reducing the Improve efficiency.
Other process parameters can also be adjusted or changed in the middle of concentrated perforation and cutting (for example, air + continuous wave can be used for perforation, and oxygen is used for cutting, and there is enough time to complete the gas switching in the middle).
5. Bridge position (micro-connection) process
During the laser cutting process, the sheet is supported by serrated support bars. If the cut part is big enough, it cannot fall from the gap of the support bar; if it is too small, it cannot be supported by the support bar, which may lose its balance and cause the part or sheet to lift. However, the high-speed moving cutting head may collide with it, which may result in shutdown or damage to the cutting head.
This phenomenon can be avoided by using the bridge (micro-connection) bit cutting process. When programming the graphics for laser cutting, the closed contour is intentionally broken in several places, so that the parts and the surrounding materials will stick together after the cutting is completed and will not fall off. Microconnect. The distance of disconnection, about 0.2 to 1 mm, is inversely proportional to the thickness of the sheet. Based on different angles, there are these different names: based on the disconnection of the contour, so called breakpoint; based on the part, it is adhered to the base material, so it is called bridge or micro-connection.
Bridges connect parts with surrounding materials, and mature programming software can automatically add an appropriate number of bridges according to the length of the contour. It can also distinguish the inner and outer contours, and decide whether to add a bridge position, so that the inner contour (waste) without the bridge position will fall off, and the outer contour (parts) of the bridge position will be adhered to the base material, thereby eliminating the sorting work. .
6. Common edge cutting function
If the contours of adjacent parts are straight lines and have the same angle, they can be combined into one straight line and only cut once. This is a common edge cut. Obviously, co-edge cutting reduces the cutting length, and co-edge cutting does not require the shape of the part to be rectangular, so the processing efficiency is significantly improved.
The above 6 major functions and processes have greatly improved the production efficiency of laser cutting machines, and have become the standard configuration of mainstream laser cutting machines.