A technologically advanced and powerful laser cutting machine is a complex system of integration of light, machinery and electricity. Its practical and efficient cutting function is an important guarantee for achieving high-efficiency and high-quality sheet processing. This article uses the inventory of laser cutting functions. , Designed to allow readers to better understand the laser cutting process, so that it can be better applied to actual production. Let's make a detailed introduction for everyone!
When processing the plate shown in Figure 1, hole 1 is cut, and then hole 2 is cut. The cutting head must be moved from point A to point B. The machine runs "empty", and the laser is turned off when the cutting head moves. This movement process is called Is idle. The frog leap is the idle mode of the laser cutting machine.
The cutting path of the early laser cutting machine during idle travel is shown in Figure 2. The cutting head has to complete the third action: rising (to a height that is safe enough), translation (reaching above point B), and descending.
In the development of laser cutting machines, Leapfrog can be regarded as an outstanding technological progress. As the cutting head moves from point A to point B, it is accompanied by an ascending action, and as it approaches point B, it is increased with a descending action.
That is, the trajectory of the cutting head in idle motion is like an arc drawn by a frog jumping. The frog jump action only takes up the translation time from point A to point B, saving the time of ascent and descent.
When cutting different materials, the focal point of the laser beam is required to be at different positions on the cross section of the workpiece, as shown in the figure below, so the focal position needs to be constantly adjusted.
Some people think that as long as the height of the cutting head is changed, the cutting head is raised, the focal position is raised, and the cutting head is lowered, the focal position is lowered. In fact, it's not that simple.
As we all know, the bottom of the cutting head is a nozzle. During the cutting process, the distance between the nozzle and the workpiece (nozzle height) is about 0.5 to 1.5mm, which is a fixed value, that is, the height of the nozzle is unchanged. , Otherwise the cutting process cannot be completed.
The focal length of the focusing lens cannot be changed, so you cannot adjust the focus by changing the focal length. Changing the position of the focusing lens can change the focus position: if the focusing lens is lowered, the focus is lowered; if the focusing lens is raised, the focus is increased. This is also a commonly used auto-focus method, with the motor driving the focus lens up and down.
Another method of automatic focusing is: before the light beam enters the focusing lens, a variable curvature mirror is configured. By changing the curvature of the mirror, the divergence angle of the reflected light beam is changed, thereby changing the focus position.
Automatic edge finding
If the sheet is skewed, it may cause waste during cutting. If the cutting machine can sense the angle and origin of the sheet and adjust the cutting process to suit the angle and position of the sheet, waste can be avoided.
After starting the automatic edge finding function, the cutting head starts from point P, and automatically measures 3 points on the two vertical sides of the sheet: P1, P2, and P3, and automatically calculates the inclination angle A of the sheet and the sheet's Origin, as shown above.
With the automatic edge finding function, you can effectively save the time of workpiece adjustment, reduce the intensity of manual work, and improve cutting efficiency.
If the contours of adjacent parts are straight and the same angle, they can be combined into a straight line and cut only once, that is, co-edge cutting.
Obviously, the co-edge cutting reduces the cutting length, which can significantly improve the processing efficiency. Co-edge cutting does not require the shape of the part to be rectangular, as shown below.
The blue lines in the picture above are common edges. Co-edge cutting not only saves cutting time, but also reduces the number of perforations. Therefore, the benefits are very obvious.
If you save 1.5 hours per day for co-edge cutting, and save about 500 hours per year, the total cost per hour is calculated at 100 yuan, which is equivalent to creating an additional 50,000 yuan a year.
The above is the process inventory of the laser cutting machine brought to you this time. In the process of actual use, different process applications will bring certain performance improvement and capacity increase, which is an important way to improve production efficiency and reduce production costs.