With the progress of The Times, laser cutting machine has been widely used in all walks of life, the development of equipment and technology update is also faster and faster. However, many customers still have a lot of problems when cutting thick plate, because thick plate cutting for laser cutting machine requirements are relatively high, so generally to use high-power laser cutting machine for cutting. Although the high power laser cutting machine can be used to cut thick plates, but more or less there will be some problems. Today, Qingyuan laser and you talk about some problems that need to be paid attention to when laser cutting machine processing thick plate:
1. Thick plate perforation: Laser perforation is the first action before cutting. The thicker the plate, the longer the piercing time. Therefore, in order to improve cutting efficiency, many laser cutting machine manufacturers will improve the punching time. A common problem with piercings is bursting. The reason for this problem is the use of high-power perforations, which are fast: the huge amount of energy injected into the perforation increases the temperature of the sheet, affecting the subsequent overall cutting. When perforating with low power pulse, the time is very long, resulting in reduced cutting power and increased unit cost.
2. Cutting section: the difficulty of laser cutting thick plate is much higher than thin plate, and the beauty of special cutting section is more obvious than thin plate, with poor accuracy. There will even be serious viscous slag phenomenon, which can not fully reflect the laser cutting machine processing value. Processing thick plate laser cutting machine requirements are relatively high, so we must choose high power laser cutting machine manufacturers when choosing laser cutting machine.
3. The role and influence of auxiliary gas mass and air pressure: take oxygen as an example; Oxygen plays an important role in fiber laser cutting of medium and thick carbon steel plates. The laser enters the workpiece surface to form a small hole. When the laser beam moves along the cutting direction, there is an oxidized melt around the hole and the cutting joint. Oxygen purity and pressure have a great effect on laser cutting. If it contains many impurities, it does not provide enough energy to form a highly liquid melt at the bottom of the cut, thus reducing the cutting quality and cutting speed. By measuring the mass and pressure of the auxiliary gas at different cutting joint locations, it is found that the narrower the cutting joint, the worse the effect of the auxiliary gas, and the more difficult it is to maintain the cutting quality. Therefore, in order to ensure proper cutting joint width, auxiliary gas quality and air pressure control, the impact on cutting quality is very heavy.
Post time: Feb-28-2023