What should I pay attention to when using laser to cut materials?
In laser cutting machine
for high - precision, large - thickness parts processing, must master and solve these key technologies.Focus position control is one of them.One of the advantages of laser cutting is that the beam has a high energy density, so the focus diameter will be as small as possible, creating a narrow slit.Since the focal depth of the focusing lens is small, for high quality cutting, the effective focal depth also depends on the diameter of the lens and the material to be cut.Therefore, controlling the position of the focus relative to the surface of the material to be cut is very important.
Because the laser power density has a great influence on the cutting speed, the lens focal length selection is a very important problem.After the laser beam is focused, the size of the spot is proportional to the focal length of the lens.When the beam is focused through a short focal length lens, the spot size is small and the power density at the focal point is high, which is more conducive to material cutting.But its shortcoming is the focal depth is very short, the adjustment margin is small, generally more suitable for high speed cutting thin materials.As the lens has a wide focal depth, as long as there is enough power density, it is more suitable for cutting thick parts.
When a laser cuts steel, oxygen and a focused laser beam are cut into the material through a nozzle, forming an airflow beam.The basic requirement for air flow is that the air flow into the incision should be large and fast, so that the incision material can be fully exothermic reaction, and at the same time there is enough power to blow out the molten material.At present, the nozzle used for laser cutting adopts a tapered hole structure with a small round hole at the end.In use, a certain amount of pressure is introduced from the side of the nozzle.The material is pure copper, small in size and a vulnerable part.
Hello, today I want to talk about the prevention of cutting round holes with stainless steel.Let's see!
Because of the flexibility and efficiency of laser machining, more and more enterprises use laser to cut round holes.The laser-machined circular hole section gets more and more lubrication, and the diameter of the circular hole can be adjusted infinitely to meet the diversified needs of the factory.
However, machining a round hole with a laser cutter is not very simple, but requires some skill.Ask the laser engineer to analyze the reasons and precautions for cutting round holes.
Air pressure mismatch
In the process of blowing, when the air pressure is too small, there will be edge slag abrasion and carbonization phenomenon, the pressure is too large, easy to burst.Therefore, according to the experience to choose the appropriate air pressure to make the cutting round hole more full, the process needs the proofreader and the machine to cooperate perfectly.
The round hole is too small.
The best solution for laser cutting machine to cut round hole is: the ratio of round hole is 1:1, that is, the ratio of hole diameter to plate thickness is 1:1.Of course, this means that the larger the hole diameter, the easier it is to cut high-quality round holes.Otherwise, when fiber laser cutting machine due to insufficient energy, cutting hole does not exist, the break point still exists, round hole is not round.
Servo motor parameter error
Ellipse or irregular phenomena sometimes occur in round holes, which is related to the motion mismatch of XY axis. The direct cause of the motion mismatch of XY axis is improper adjustment of servo motor parameters.Therefore, the quality of cutting round hole has certain requirements on servo motor.
Accuracy error of guide rail and lead screw
If the parameter error of servo motor affects the cutting quality, the precision error of guide rail and lead screw will directly lead to the hole precision less than expected.This is related to the strength of laser cutting machine manufacturers.In the actual operation, the quality and performance of laser drilling are not good, which affects the added value of the product.Therefore, it is necessary to choose high quality, big brand laser cutting machine.
All these parameters are used to judge whether the parameters such as precision and speed of cutting round holes meet the requirements of the specification and whether the quality of laser cutting machine purchased is qualified or not.Therefore, in the procurement process, customers must keep their eyes open.
With the development of shipbuilding technology in China, the requirement of shipbuilding is getting higher and higher.In order to ensure the overall quality of the ship, advanced cutting equipment is needed when cutting the core parts of the ship.Therefore, large laser cutting machine is gradually applied in ship cutting.
Unlike in other industries, shipbuilding tends to be made of thicker materials, which requires more laser cutting machines to cut the thicker materials.Large laser cutting machine is one of the leading laser cutting industry.The power of the equipment has reached tens of thousands of watts, but also broke through the upper limit of material cutting thickness.
Traditional cutting techniques, such as flame cutting and plasma cutting, were widely used in the early shipbuilding industry.However, with the development of shipbuilding industry, the defects of these traditional cutting techniques began to appear.Faced with copper, aluminum and other special materials or materials with high technological requirements, due to the limited cutting accuracy, the traditional cutting technology can no longer meet the user's machining needs.Large laser cutting machine can not only cut different types of plate, but also greatly reduce the production cycle and cost of ships.Hf4020 IVWJ series high-power closed-circuit switch laser cutting machine Sino-Russian laser is very suitable for the manufacture and processing of ships.The features of the equipment are as follows:
1. Using laser technology, computer control technology and high-performance CNC laser power system, can quickly and efficiently process various metal plates;
2. It is a new generation of laser plate cutting and processing equipment with safety, high efficiency, energy saving, environmental protection, high power, large format, fast exchange, full protection and partition extraction
3. The process has the advantages of fast processing speed, small slit, small thermal effect, etc., especially suitable for the processing of metal sheet.
The equipment is a non-contact, pollution-free, low noise, material saving green processing technology equipment, with digital automation and intelligent and flexible characteristics.