With the continuous development of heavy industry, laser cutting technology has developed from thin plate cutting to thick plate cutting of large size, and laser cutting has gradually entered the era of high power. The new era of industrial manufacturing on the metal plate cutting accuracy, speed, thickness put forward new requirements, laser cutting machine can achieve higher and higher power. From the perspective of industrial development, a high-power laser cutting machine is the inevitable product of a certain stage, but also the trend of industry development.
1.In the field of sheet metal processing, the advantages of laser cutting machines are very prominent and have gradually replaced the traditional processing process as the core equipment for sheet metal cutting due to the advantages of high precision, high speed and good quality . From the rise of laser cutting machines to fibre laser cutting machines to replace YAG and CO2 machines, to the continuous introduction of high-power laser cutting machines, for cutting thick plates and cutting efficiency, high-power equipment has been the trend.
2.In recent years, high-power laser cutting machine has become a hot topic in laser cutting field, and many companies continue to launch more than 10,000 watts of fibre laser cutting equipment. For the sheet metal processing industry, the birth of high-power cutting equipment has greatly improved the thickness and efficiency of sheet metal cutting. The emergence of such high-power cutting machines continues to break the limits of material cutting thickness. The resulting reduction in the price of processing thick plates creates a good cycle that promotes the further expansion of laser cutting applications.
二.The Introduction of High-power Laser Cutting Machine
1.The fibre laser cutting machine can be divided into three power grades: low power, medium power and high power. For the general thickness of stainless steel and carbon steel, a low power laser cutting machine can make good cutting. And for cutting thick plates and cutting efficiency, high power laser cutting machine can be good. Therefore, laser cutting machines with laser power above 10,000 watts are collectively referred to as high-power laser cutting machines.
2.For laser cutting metal plate thickness, the high-power cutting machine on the selected fibre-optic exciter power specifications are different.The power specifications of the fibre optic exciter selected for the high-power cutting machine are also different, from the current development trend, in the metal processing market, small, medium and large enterprises gradually upgrade to a variety of specifications.
3.When working in a high-power laser cutting machine, in order to ensure the accuracy of the cut, the speed of the cut, the effect of the cut section and many other advantages, the purity of the oxygen used requires high, generally requiring a purity of 99.99%.
三.The Features of High-power Laser Cutting Machine
1.The machine equipped with a 10,000-watt fibre laser has a new triangular structure beam, which features: ① 30% weight reduction and significantly improved dynamic performance. ②Maximum moving speed can reach 200m/min and acceleration of 4g dynamic response characteristics. ③The base increases the weight by about 20% and changes the machine fixing method to eliminate the impact of high acceleration motion on the machine.
2.Software and control system is like the brain and command centre of the machine tool, the accuracy and efficiency of machine tool operation in addition to the dividends brought by hardware upgrades, the difference in the performance of the whole machine mainly comes from the difference in software and control system, and often varies greatly.
3.(1) The response speed of the capacitive sensor is 3 times higher than that of the traditional cutting head. (2) Z-axis speed is improved, running without stopping and more smoothly, thin plate cutting efficiency is increased by more than 30%, the effectiveness of frog jump function is improved, and the acceleration adaptation function is improved. ③Improve the fast piercing and precision piercing function and remote diagnosis function, and reserve the intelligent interface for the function of “Industry 4.0”.
4.A high power cutting head is the core component to ensure stable cutting in case of high power continuous operation with the following characteristics:
High power cutting head has a better sealed and more adequate cooling system, a wider range of applications of focus and high-temperature resistant lenses.
In order to overcome the problem of focal point drift, the high-power cutting head adopts a new air path design structure and replaces the nozzle with a new structure, so as to improve the cutting speed and cutting stability.
四.Manual nozzle change mode
1.The nozzles need to be replaced in cutting according to the thickness and material of the cut material. For many years, the nozzles have been replaced manually, which is not only inefficient and requires repeated work by technicians, but also difficult to guarantee accuracy and stability after replacement. How to replace nozzles efficiently and quickly, and ensure that each replacement is foolproof and maintain accuracy, is a technical problem in the field of laser cutting.
The high-power laser cutting machine applies the function of automatic nozzle replacement. Automatic nozzle replacement, laser head calibration, and automatic nozzle cleaning can be realized, reducing the amount of manual repetitive labour. Automatic nozzle replacement can be achieved by operating the corresponding command on the touch screen. Automatic nozzle changing technology has the following advantages.
Reduces labour intensity and ensures positioning accuracy and work stability when changing nozzles.
Equipped with a complete control system, it can realize automatic nozzle type and specification change according to different materials and different plate thickness, which reduces the time to be changed by manual labour, thus improving the production efficiency.
The automatic nozzle replacement is a fully enclosed protection device, which provides a good guarantee for nozzle equipment and personal safety.
五.High-power Laser Cutting Capability
(1) cutting the thickness of thick plates continue to improve
At present, high-power laser cutting machine cutting aluminium plate thickness up to 40mm, stainless steel plate thickness up to 130mm, with the continuous upgrading of high-power laser cutting machine technology, the thickness of cutting materials will continue to increase, the price of processing thick plate will gradually reduce, and accelerate the promotion of high-power laser cutting machine in the field of thick plate applications
(2) cutting the efficiency of thin plate multiplier
Cutting thickness of 3 ~ 10mm stainless steel plate, 10 000W laser cutting machine cutting speed is more than twice as fast as 6000W.
10 000W laser cutting machine in carbon steel cutting applications, you can achieve 18 to 20mm / s fast bright surface cutting, twice the speed of ordinary standard cutting.
Carbon steel plates up to 12mm can be cut with compressed air or nitrogen at 6 to 7 times the cutting efficiency of oxygen cutting carbon steel speed.
六.The Advantages of High-power Laser Cutting Machine
(1) High speed
Laser cutting speed has exceeded 20m/min, the two-axis movement speed of the processing cutting machine can reach 250m/min, and the acceleration has reached about 10g during the operation.
(2) High precision
Small holes of about ϕ10mm in a 1mm thick plate can be cut at about 500 per minute. The error between these small holes in the cutting process is very small.
(3) To the direction of thick plate
High-power laser cutting machine power gradually increased, the corresponding cutting of thick plate size is also increasing.
(4) to the direction of large size
The processing size range of laser cutting technology is also increasing, laser cutting technology has begun to develop in the direction of large size.
(5) Automatic unmanned
The automatic unmanned laser cutting technology has the necessity and urgency of development. ①The application of computer network technology has led to the automatic unmanned laser cutting technology. ②The market demand for the application of this technology is also increasing, prompting the laser cutting technology to achieve fully automatic unmanned.
In accordance with the technical requirements of Industry 4.0, follow the pace of intelligent manufacturing. The use of accurate graphic recognition technology, simple operating procedures, convenient human-computer intelligent interaction, the realization of the laser and computer control, CNC technology, optical systems, high-precision and automated positioning devices, etc., combined with automatic material scheduling, cutting process database, remote fault diagnosis, remote control, etc., to meet the needs of high-volume and complex parts processing
As a very ideal processing means in cutting processing, laser cutting represents the development direction of modern metal processing technology. High-power laser cutting machine is now also towards high speed, high precision, large format, three-dimensional cutting and special materials cutting and other areas of critical technology research and development, so as to promote the development of high-power laser cutting technology to meet the growing market demand.