Views: 59 Author: Durmapress Publish Time: 2020-06-02 Origin: Durmapress
Guide: Judging the performance of the Fiber Laser Cutting Machine, including cutting accuracy, speed, effect and stability, are several ways to determine the quality of the laser cutting machine.
Cutting accuracy of laser cutting machine
The laser cutting machine has the advantages of high cutting precision, fast speed, no limitation of cutting patterns, and low processing cost. It is gradually replacing traditional metal cutting technology equipment. At present, the application range of laser cutting machines is getting wider and wider, and the cutting accuracy of laser cutting machines is related to the processing technology, so it is also one of the most concerned issues for buyers. Many people have a certain misunderstanding about the accuracy of laser cutting. In fact, the cutting accuracy of the laser cutting machine does not entirely depend on the equipment itself, but is affected by many factors. Next, let's take a brief look at which factors are most likely to affect the cutting accuracy of the laser cutting machine.
a. The spot size after the laser beam passes through focusing. The smaller the spot after the laser beam is focused, the higher the cutting accuracy.
b. The positioning accuracy of the worktable determines the cutting repeatability. The higher the precision of the worktable, the higher the precision of cutting.
c. The greater the thickness of the workpiece, the lower the accuracy and the larger the slit. Because the laser beam is tapered, the slit is also tapered, and it is also stainless steel. The slit of 0.3mm stainless steel is much smaller than that of 2mm stainless steel.
d. The workpiece material has a certain influence on the laser cutting accuracy. Under the same circumstances, stainless steel has higher cutting accuracy than aluminum, and the cutting surface is smoother.
Laser Cutting machine cutting speed and cutting effect
Laser cutting has no burrs, wrinkles and high precision. For many electromechanical manufacturing industries, modern CNC laser cutting systems controlled by computer programs can easily cut workpieces of different shapes and sizes, which are often preferred over punching and molding processes; although the processing speed of laser cutting machines is still slow Yu die punching, but it does not consume the die, there is no need to repair the die, it also saves the time to replace the die, which saves processing costs and reduces production costs, so it is more cost-effective to consider in general. In the metal processing industry, which occupies a heavy weight in industrial manufacturing systems, many metal materials, regardless of their hardness, can be cut without deformation. However, for high-reflectivity materials such as gold, silver, copper, and aluminum alloys, because they are also good heat transfer conductors, laser cutting is difficult, even impossible.
During the laser cutting process, an auxiliary vapor suitable for the material being cut is added. When cutting steel, oxygen is used as an auxiliary vapor to produce an exothermic chemical reaction with the molten metal to oxidize the material, while helping to blow away the slag in the slit. For cutting polypropylene and other plastics, compressed air is used. For inflammable materials such as cotton and paper, inert vapor is used for cutting. The auxiliary vapor entering the nozzle can also cool the focusing lens, preventing smoke and dust from entering the lens holder and contaminating the lens and causing the lens to overheat. The choice of cutting speed during laser cutting is also very important. The optimal cutting speed range can be selected according to the equipment description or determined by experiment. Due to the thickness of the material, the material, the melting point, the thermal conductivity and the melting After the surface tension and other factors, the cutting speed also changes accordingly.
a. Increasing the cutting speed moderately can improve the quality of the cut, that is, the cut is slightly narrower, the cut surface is smoother, and the deformation can be reduced at the same time.
b. The cutting speed is too fast so that the linear energy of the cutting is lower than the required value. The jet in the slit cannot quickly blow away the molten cutting melt immediately to form a large trailing amount. Surface quality is reduced.
c. When the cutting speed is too low, because the cutting point is the anode of the plasma arc, in order to maintain the stability of the arc itself, the anode spot or anode area must find a place to conduct current near the slit closest to the arc, and at the same time it will flow toward the jet. Radiation transfers more heat, so that the incision is widened. The molten material on both sides of the incision gathers and solidifies at the bottom edge, forming a slag that is not easy to clean, and the upper edge of the incision is heated and melted to form a rounded corner.
d. When the speed is extremely low, the arc will even extinguish due to the incision being too wide. This shows that good cutting quality and cutting speed are inseparable.
Stability of Durmapress laser cutting machines
How to measure the stability of a laser cutting machine Supplier is a problem that many buyers are concerned about. The common laser cutting machines on the market are mainly composed of mainframe, guide rail, rack and pinion or ball screw, transmission mechanism and other components. Below we will make a simple analysis from these components.
The main machine consists of a beam and two longitudinal end frames. The machine gantry is composed of an end frame and a cross beam. The cross beam adopts a rectangular square tube structure, which tempers and removes internal stress. It has high strength and rigidity. Multiple mobile trolleys can be installed on the cross beam. The horizontal movement devices all use towline. The mechanical part realizes high-precision rack-and-pinion transmission. The guide rails are made of high-precision special imported guide rails. The precision-machined sliding guide rails are fastened to the concrete or steel frame with supports and are equipped with adjusting bolts for easy installation and Adjustment. The longitudinal drive system is installed in the longitudinal end frame, and the low position design makes the transmission more reasonable and stable.
At the bottom of the longitudinal end frame, there are two front and rear rolling wheels that can smoothly roll along the guide rail. The front and rear ends are equipped with guide rail scrapers to ensure that the surface of the guide rail is free of debris. Both sides of the bottom are equipped with eccentric clamping wheels for guiding action. The guiding accuracy of the machine, the machine is equipped with high-strength linear guide rails (transverse drive or high-precision precision grinding guide rails) in the horizontal drive and torch lifting. The precision-machined gears and racks ensure the vertical and horizontal drive accuracy of the machine And eliminate the gap.