CNC laser cutting technology of the hottest metal

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At present, China has developed into the largest country in steel production and consumption in the world. In recent years, in order to meet the pressure demand of the industrial market in the face of the international market, various laser processing equipment products for cutting pipes and other three-dimensional workpieces have been introduced, including TRUMPF, BLM The foreign well-known laser companies represented by Mazak have a large number of high-end laser pipe processing equipment for actual industrial production, especially in the automobile manufacturing industry, oil mining, machinery manufacturing, metal pipe processing, which are widely used. Such equipment in China is still in the research and development stage, and the corresponding process and technology research has also been paid more and more attention by relevant experts and domestic laser enterprises

with the rapid growth of metal pipe production and consumption in China, pipe laser cutting equipment is rapidly popularized in China. The rapid growth in the demand for NC cutting talents and laser pipe cutting technology also highlights the serious shortage and lag of laser pipe cutting equipment and NC cutting talents and processes. This leads to low cutting efficiency and poor cutting quality, resulting in serious waste of pipes. This paper will introduce and analyze the main technical problems of laser tube cutting, and provide targeted solutions

1. Full stroke automatic laser cutting and blanking of long-length metal pipes

for the process requirements of full stroke automatic laser cutting and blanking of long-length metal pipes, a unique double drive pneumatic chuck rotating mechanism (driving shaft W, driven shaft W1) is used in the mechanical structure, and the left driving shaft W-axis pneumatic chuck rotating mechanism is fixed to clamp the pipes, and the pipes are cut through the X, y, w movement of the machine tool, The pneumatic chuck rotation mechanism of the right driven shaft W1 can move along the axial direction of the workpiece with the workbench, and can realize the full stroke automatic laser cutting and blanking of large-length metal pipes

2. Numerical control cutting technology

numerical control cutting is a large-scale, high-efficiency and high-quality cutting production method for pipes. The core of numerical control cutting is the numerical control cutting system. At present, there are quality problems in the process of laser pipe cutting, such as over burning of the cutting point of the part, over burning of the corner of the part, inclination of the cutting surface, and the deformation of the circle when cutting circular parts or the current inability to close, which directly lead to serious waste of pipes and low cutting production efficiency

NC cutting technology refers to the cutting control software of the NC system, which provides advanced cutting technology and rich cutting experience, so that cutting operators can achieve high-quality and high-efficiency NC cutting through skilled use of the control system

3. Professional tube Nesting Technology

NC laser tube cutting due to high cutting efficiency, programming nesting is more complex. If used improperly, it will cause tube waste and low cutting efficiency. Through the professional pipe cutting and nesting software, the drawing, nesting and blanking are pre programmed on the computer to generate the NC cutting program, and then the full stroke automatic laser cutting and blanking of large-length metal pipes are carried out. Professional tube nesting software is the basis and prerequisite for realizing large-scale, high-efficiency and high-quality cutting production of CNC tube cutting machine

4. Pipe cutting process

when cutting pipes (especially for square pipes with small diameter), the molten slag is attached to the inner wall of the pipe, and most of the heat generated by cutting is absorbed by the workpiece. When the cutting density is large, the pipe is often overheated, and the corners and four corners of the square pipe are overheated, which seriously affects the cutting quality and even cannot be cut. For such problems, we can adopt: (1) the laser cutting head with height sensing servo system can ensure that the height of the cutting nozzle and the workpiece surface plane remains unchanged (the focus remains unchanged) during the cutting process, so that the cutting effect will not be affected with the change of the workpiece surface; (2) Method of increasing oxygen pressure (MPA); (3) Improve the synthesis speed of sharp corners through software

the above methods can solve the problems of "overburning" and slag hanging in pipe cutting

laser tube cutting technology is in the process of rapid development and continuous improvement. With the continuous updating and development of computer technology, mechanical structure, cutting technology and optimization algorithm, NC laser tube cutting technology will more prominently show its intelligent, fast and optimized cutting process and technology. For the efficient cutting and high-quality cutting of laser tube cutting machine, it refers to the cutting of metal sheet at the top of the experimental machine, Export growth is steady, and pipe materials and energy consumption are saved, providing technical guarantee

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