Four: laser power. Including peak power, energy stability and other factors. Different power can be cut through the thickness of the metal sheet. For example, a 4KW laser can cut 20mm thick carbon steel, or 15mm stainless steel, 10mm aluminum alloy; and 5KW or more laser can cut 25mm thick carbon steel. , stainless steel up to 20mm.
Increasing power has always been a topic of laser research, and every manufacturer is working hard to improve the level of process design and increase laser power to achieve a wider processing space. At present, Germany TRUMPF has produced 40KW lasers for industrial production. The pickling production line of China's major steel mills uses the 12KW laser from TRUMPF without exception.
Another indicator of power is power stability, excellent cutting quality, and must be excellent throughout the cut. Long-term production is also a very important test for lasers. DC-excited lasers have attenuated power during long-term operation due to electrode ablation. In addition, since some of the vacuum pumps and turbo pumps of the laser are lubricated with lubricating oil, the lubricating oil contaminates the laser cavity and shortens the life of the laser.
Five: beam divergence angle. From a strict point of view, the beam divergence angle is not part of the laser part, but since the mode of the laser has a great influence on the far-field divergence angle, we will discuss it here. The influence of the beam divergence angle on the cutting quality is reflected in the width and slope of the slit. The smaller the divergence angle, the narrower the slit width, and the smaller the slope, the higher the quality.
Second: the factors that affect the quality of laser cutting - mechanical CNC articles
As a complete solution, not only must there be high quality lasers, but also good machine tools and CNC systems to match.
One: CNC system; At present, there are three kinds of mainstream CNC systems in the world: Siemens 840D, Japan FUNAC, France NUM and other systems.
Among them, Siemens relies on professional thinking and deep accumulation in numerical control systems and drive products to continuously create a model of machine tool products, providing increasingly perfect technical support for automation applications. SINUMERIK not only means a series of CNC products, but its strength lies in the production of a CNC system suitable for different control requirements in various control fields, which requires only a few components. It is highly modular, open and standardized, suitable for operation, programming and monitoring. NUM is a subsidiary of Schneider Electric and the second largest supplier of CNC systems in Europe. The main products are: NUM1020/1040, NUM1020M, NUM1020T, NUM1040M, NUM1040T, NUM1060, NUM1050, NUM drives and motors. Japan's FANUC company also has a lot of achievements in the CNC system. The three major manufacturers have their own strengths. In general, the Siemens system is widely used for its stability and other characteristics.
Second: the drive system; good drive hardware can ensure perfect cutting quality and ensure the rigidity of the machine. The advanced laser machine uses a high-precision, maintenance-free servo motor to achieve high-speed perfect motion of the XYZ axis of the cutting head.
Three: height tracking system; sub-contact and non-contact. The contact height tracking system uses a probe to achieve high tracking and scratches the plate during cutting, so this type of system is generally not recommended for sheet metal cutting. The non-contact height tracking system uses capacitive sensors for high tracking adjustment. Achieving strict height consistency to ensure uniform cutting quality while eliminating the risk of collision of the sheet with the cutting head.
Four: optical path transmission; currently there are three kinds of mixed optical path, single-arm cantilever flying light path and gantry flying light path. The mixing optical path adopts the X-axis movement of the table or the workpiece, the Y-axis movement of the cutting head, the movement of the workpiece in the processing, the accuracy error is easy to occur, and the plate is easily scratched, but the technology is relatively simple and the cost is low. Currently, the domestic laser equipment manufacturing plant mainly This type of cutting machine is available for the die cutting board industry. The single-arm cantilever beam travels at a single point of load on the cutting head. The rigidity of the equipment is insufficient. Generally, a special foundation is required, and the stability in long-term operation is insufficient. The gantry-type flight path is the most mature technology at present, and it has the characteristics of high speed, good rigidity and high precision.
Of course, in a complete system, there are still many factors to be evaluated, such as the degree of research on the laser process by the supplier, whether the different processing requirements for various materials can provide a complete solution to the process; the integrity of the device, long-term stability Sex; anti-electromagnetic interference capability; environmental requirements... all need us to assess.
Third: Laser cutting technology for the future - TRUMPF's solution
TRUMPF Group is one of the leading companies in the global manufacturing technology field. Since its establishment in 1923, it has a glorious history of more than 80 years. Headquartered in Ditzingen, near Stuttgart, Germany, TRUMPF is a global leader in technology and markets for industrial lasers and laser systems. At present, the number of TRUMPF laser cutting machines installed in the world has exceeded 7,000. In fiscal year 2004, Trumpf Group's turnover was 1.5 billion euros. It is the largest laser company in the world. The largest machine tool factory in Europe.
TRUMPFheadquarters Trumpf Global Headquarters
In response to the increasing demand for laser processing in industrial processing, TRC's TCL3050 series CNC laser cutting machine represents the development direction of laser processing worldwide. It uses the most advanced 5000W or 6000W folding RF excitation laser from TRUMPF. The TEM01 mode achieves perfect quality even when cutting carbon steel up to 25mm thick, 20mm stainless steel and 15mm aluminum.
The CNC part of the machine adopts Siemens 840D. It adopts the most advanced magnetic suspension linear motor drive technology in driving. It is suitable for long-time high-speed operation, stable operation and not easy to wear. The gantry-type full flight light path has XY axis linkage speed of 300 m/min. .
The intelligent DIASIII height adjustment system ensures that the cutting head is in line with the strict distance of the workpiece during high-speed cutting and prevents collisions.
On the software side, the TO programming system equipped with the machine integrates the technical skills obtained by a large number of process tests, and the user does not need to spend too much time to explore the cutting process. At the same time, the software achieves different processing strategies for various thickness plates by combining with various unique processing technologies, such as ion cloud monitoring system, HILAS high pressure cutting, and rintLas high speed cutting technology.
In addition, TRUMPF is equipped with many of the most advanced process technologies, such as micro hole processing technology, local cooling technology, programming management, self-diagnosis, self-maintenance function, online diagnosis, laser log function, etc. Laser-like protection ensures operator safety. The laser processing is no longer a complicated work, but becomes the processing of art advocated by TRUMPF, and the operator's Enjoyhiswork enjoys the work.
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