Laser-cutting-machine-common-problems-and-handling-methods

Suzhou Quick Laser Technology Co., Ltd.2022-07-15

1. Cutting perforation technology

For laser cutting machines without punching devices there are two basic methods of piercing.

Blast piercing - the material is irradiated by a continuous laser to form a crater in the centre, then a hole is formed by the oxygen flow coaxial to the laser beam which quickly removes the molten material. Pulsed piercing - a small amount of material is melted or vaporised by a high peak power pulsed laser, often with air or nitrogen as an auxiliary gas to reduce the expansion of the hole due to exothermic oxidation. Each pulse of the laser produces only a small jet of particles that penetrate gradually, so that the perforation of thick plates takes a few seconds.

2. Cutting and processing of small holes (small diameter and plate thickness) analysis of deformation

High-power laser cutting machine in the processing of small holes is not to take the blast perforation, but with a pulse perforation (soft piercing), which makes the laser energy in a very small area is too concentrated, the non-processing area will also be scorched, resulting in hole deformation, affecting the quality of processing. This should be solved by changing the pulse piercing (soft piercing) method to blast piercing (normal piercing) method in the processing program. For low and medium power fiber laser cutting machine is the opposite, in the small hole processing should be taken pulse perforation in order to achieve a better surface finish.

3. Laser cutting mild steel, the workpiece burr solution  

The laser focal point is not correctly positioned up and down, you need to do the focal point position test, according to the focus of the offset to adjust; laser output power is not enough, you need to check whether the work of the laser generator is normal, if normal, then observe the laser control button output value is correct, to adjust; cutting line speed is too slow, you need to increase the line speed when operating control; cutting gas purity is not enough, you need to provide High quality cutting working gas; laser focus shift, need to do focus position test, according to the amount of focus shift to adjust; machine tool running time too long instability, at this time need to shut down the machine restart.

4. Laser cutting processing of stainless steel and aluminum zinc plate, the workpiece has a burr generated by the analysis

First of all, consider the factors that appear when cutting mild steel burrs, but not simply to speed up the cutting speed, because the increase in speed will sometimes appear to cut through the plate, this situation is particularly prominent in the processing of aluminum and zinc plate. This should be addressed by considering other factors of the machine, such as whether the nozzles should be replaced, the movement of the guide is not stable, etc.

5. The laser does not completely cut through the state of analysis  

At this time, the following aspects need to be noted: the choice of laser head nozzle and processing plate thickness does not match; laser cutting line speed is too fast, the need for operational control to reduce the line speed; inaccurate nozzle induction leads to laser focus position error is too large, the need to re-test the nozzle induction data, especially in cutting aluminum is most likely to occur.

This High Power Bevel Laser Cutting Machines from Suzhou Quick Laser Technology Co., Ltd. features a hollow/semi-hollow structure machine tool and Spac intelligent cutting system for high precision, fast cutting speed, safe production process and no quality problems, effectively improving plate processing The machine have been widely used in the market. We look forward to working with you!