威廉希尔官方下载Feb 07, 2020
Laser cutting accuracy is an important factor for measuring the quality of a laser cutting machine. The four major factors that affect the accuracy of a laser cutting machine. The error in the processing size is a failure often encountered when processing with a laser cutting machine. Production efficiency has increased production costs. In fact, the accuracy of metal laser cutting machines does not depend entirely on the equipment itself, but consists of many factors.
1. Laser condensing size of the laser generator: If the spot is very small after focusing, the cutting accuracy is very high, and if the gap after cutting is very small. It means that the precision of the laser cutting machine is very high, and the quality is very high. But the beam emitted by the laser is tapered, so the slit cut out is also tapered. Under this condition, the greater the thickness of the workpiece, the lower the accuracy, and therefore the larger the slit.
2. Precision of worktable: If the precision of worktable is very high, the precision of cutting will be improved accordingly. Therefore, the accuracy of the workbench is also a very important factor in measuring the accuracy of the laser generator.
3. The laser beam condenses into a cone: When cutting, the laser beam is tapered downward. At this time, if the thickness of the workpiece to be cut is very large, the cutting accuracy will be reduced, and the gap will be very large.
4. Different cutting materials: Even if the materials are the same, if the composition of the materials is different, the cutting accuracy will be different. Therefore, the material of the workpiece also has a certain influence on the laser cutting accuracy.
Metal laser cutting machine is realized by applying high power density energy generated after laser focusing. It uses a precision ball screw drive mechanism to optimize the control of the numerical control system, which can meet the processing of precision parts, and has stable dynamic performance and can last for a long time. Therefore, it has attracted much attention in metal cutting. The cutting accuracy of metal can affect the cutting process.
Since cutting accuracy problems arise, how can we ensure high-precision laser cutting?
Methods to improve cutting accuracy:
l Focus position control technology. The smaller the focal depth of the focusing lens, the smaller the diameter of the focal spot, so it is important to control the position of the focal point relative to the surface of the material being cut.
l Cutting perforation technology. Any kind of thermal cutting technology, except in a few cases, can start from the edge of the board, generally a small hole must be punched in the board. Earlier on the laser punching compound machine, a hole was first punched out with a punch, and then the laser was used to cut from the small hole.
l Nozzle design and airflow control technology. When laser cutting steel, oxygen and a focused laser beam are emitted through the nozzle to the material being cut, thereby forming an airflow beam. The basic requirements for the air flow are that the flow of air into the incision should be large and the speed should be high, so that sufficient oxidation allows the incision material to fully perform an exothermic reaction; at the same time, there is sufficient momentum to eject the molten material.
Laser cutting without burrs, wrinkles, high precision, superior to plasma cutting. For many electromechanical manufacturing industries, because the modern laser cutting system of the microcomputer program can easily cut workpieces of different shapes and sizes (workpiece drawings can also be modified), it is often preferred over punching and molding processes; despite its processing speed It is slower than die punching, but it has no die consumption, no need to repair the die, and saves the time to replace the die, which saves processing costs and reduces product costs, so it is more economical in general. That's why it's so popular.
Compared with traditional sheet processing methods, laser cutting has high cutting quality (narrow cut width, small heat affected zone, smooth cut), high cutting speed, high flexibility (can cut any shape at will), and a wide range of materials Adaptability and other advantages.