4 Practical Function of laser Cutting Machine
2022-06-15 15:56:37

4 Practical Function of laser Cutting Machine


  • Leapfrog
  • Auto focus
  • Automatic edge finding
  • Micro-connection

 


1. Leapfrog

Leapfrog is an idle running of laser machine. As shown in the figure below, after cutting the hole 1, then the hole 2 is cut. The cutting head should move from point A to point B.

Of course, the laser should be turned off in the process of moving. The process of movement from point A to B, The machine "empty" run, known as idle running. The idle running of the early laser cutting is shown below, with the cutting head performing three actions in succession : rising (to a safe enough height), Leveling(to reach above point B), and descending. Compressing the idle time will increase the efficiency the machine.

If the three actions, which are performed in succession, are performed "simultaneously" the idle time can be reduced. When the cutting head moves from point A to point B. it rises at the same time; When it approaches point B, it falls at the same time. As shown in the figure below. The trajectory of the cutting head's idle running movement is like an arc drawn by a frog jumping. In the process of the development of laser machine, frog jumping is considered outstanding technical progress. Frog jumping action, only takes up the from point A to point B flat movement, eliminating the time of ascent and descent. Frog hopping, the food is captured.

For frog hopping of the laser cutting machine, that "captures" is high efficiency. If the laser cutting machine does not have the frog jump function now, it will not be in the mainstream.

 

2. Auto Focus

When cutting different materials, it is necessary that the focus of the laser beam falls on different parts of the workpiece cross-section. Therefore, it is necessary to adjust the position of the focal point(focus adjustment). Earlier laser cutting machines were generally manually focused. today, many manufacturers have machines with automatic focus. People might say that changing the height of the cutting head is fine, it the cutting head rises, the focus position is high, if the cutting head lowers, the focus position is low. it's not that simple.

In fact, in the cutting process, the distance between the nozzle the workpiece(nozzle height) is about 0.5- 1.5 mm, may as well be regarded as a fixed value, that is,the nozzle height remains unchanged,so it can raise and lower the cutting head to adjust the focus (otherwise the cutting process can not be completed). The focal length of the focusing lens is not changeable, so it cannot expect to change the focus length to adjust the focus either. If the position of the focusing lens is changed, the focus position can be changed. If the focusing lens goes down, the focus goes down, and if the focusing lens goes up, the focus goes up. This is indeed one way to adjust focus.

Using a motor to drive the focus lens in an up and down motion allows for automatic focus. Another method of auto-focusing is: A variable curvature of the reflector(or adjustable lens) is placed before the beam enters the focusing lens. By changing the curvature of the reflector, the divergence angle of the reflected beam is changed, thereby changing the focus position, as shown in the figure below. With the auto-focus suntion, the processing effcessing of laser cutting machines can be significantly improved. The punching time of thick plate is greatly reduced, the machine can automatically and quickly adjust the focus to the most suitable position for workpieces of different materials and thickness.

 

3. Automatic edge finding

As shown in the figure below, when the sheet is placed on the table, if it is skewed, it can cause waste when cutting. If the angle and origin of the sheet's tilt can be sensed in the cutting process can be adjusted to fit the angle and position of the sheet, thus avoiding waste.

So,automatic edge finding has been developed. When the auto - edge function is activated, the cutting head starts from point P and automatically measures three points on the two vertical sides of the sheet, P1, P2 and P3, and then automatically calculates the angle of inclination A and the origin of the sheet. Thanks to the automatic edge finding funtion, the machine,s efficiency is improved by eliminating the time needed to adjust (move) the workpiece earlier, which is not an easy task on the cutting table and weighs hundreds of kilograms. A technologically advanced and powerful high-powered laser cutting machine is a complex system that integrates light, machine and electricity.

 

4. Micro-connection

During the laser cutting process, the sheet is held in place by a serrated support bar If the cut parts are not small enough, they cannot fall from the gap of the support bar. If it is not large enough to be supported by the support bars, or may lose its balance and warp. A high speed cutting head can collide with it, resulting in a stoppage or damage to the cutting head. This can be avoided by the bridge(micro-joint)cutting process.

When programming laser cutting on graphics,the closed contour is intentionally broken in several places, so that after the cutting is completed, the parts adhere to the surrouding materials withoout falling, these disconnects these disconnects are bridging location. This is also known as a breakpoint, or micro junction (a term derived from a rigid translation of Micro Joint) The distance of the break, about 0.2 to 1 mm, is inversely proportional to the thickness of the sheet. Based on different perspectives, there are these different calls : Based on the contour, if it is broken, so it is called a breakpoint.

Based on the part, of it adheres to the base material, so it is called a bridge location or micro-connection. Bridges connect the part to the surrounding material, and sophisticated programming software automatically adds the appropriate number of bridges according to the length of the profile. it is also possible to distinguish between internal and external contours and decide whether to add bridging positions, so that internal contours(scrap) without bridging positions fall off, while wxternal contours(parts) with bridging posittions remain attached to the base material and do not fall off, thus eliminating the need for sorting

 

 


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