In recent years, in order to meet the needs of the industrial market, various laser processing equipment products for pipe and other three-dimensional workpiece cutting have come out one after another, especially in the automobile manufacturing industry, oil mining, machinery manufacturing, metal pipe processing, which are widely used.
 

Such equipment is still in the research and development stage in China, and the corresponding process and technology research has also been increasingly valued by relevant experts and domestic laser enterprises. China has also developed into the world's largest steel production and consumption country.

With the rapid growth of metal pipe production and consumption in China, pipe laser cutting equipment is rapidly popularized in China. The rapid growth of demand for CNC cutting talents and laser pipe cutting technology also highlights the serious shortage and lag of laser pipe cutting equipment and CNC cutting talents and technology. This leads to low cutting efficiency, poor cutting quality and 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 large length metal pipes

For the technological requirements of full-stroke automatic laser cutting and blanking of large length metal pipes, the unique double-drive pneumatic chuck rotating mechanism (driving shaft W, driven shaft W1) is adopted in the mechanical structure. The pneumatic chuck rotating mechanism of the left driving shaft W axis is fixed to hold the pipe. The pipe is cut and processed through the machine tool X, Y, W movement. The pneumatic chuck rotating mechanism of the right driven shaft W1 can move along the axial direction of the workpiece with the workbench, It can realize full-stroke automatic laser cutting and blanking of large length metal pipes.

2. CNC cutting technology

CNC cutting is a mass, efficient and high-quality cutting production method for pipes. The core of CNC cutting is CNC cutting system. At present, there are quality problems in the laser pipe cutting process, such as: the part cutting point is too burnt, the part corner is too burnt, the cutting surface is inclined, and the circle is deformed or cannot be closed when cutting round parts, which directly leads to serious waste of pipe and low cutting efficiency.
CNC cutting technology refers to the advanced cutting technology and rich cutting experience provided in the cutting control software of the CNC system, so that the cutting operators can achieve high-quality and efficient CNC cutting through skilled use of the control system.

3. Professional pipe nesting technology

Due to the high cutting efficiency and the more complex programming and nesting of CNC laser pipe cutting, if it is not used properly, it will cause pipe waste and low cutting efficiency. Through the professional pipe cutting and nesting software, the drawing, nesting and blanking section programming are carried out in advance 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 pipe nesting software is the basis and prerequisite for realizing mass, efficient and high-quality cutting production of CNC pipe 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 the cutting is absorbed by the workpiece. When the cutting density is large, the pipe will often overheat, and the corners and four corners of the square pipe will burn, which will seriously affect the quality of the cut, and even cannot be cut. For such problems, you can use:

(1) The laser cutting head with height sensing servo system can ensure that the height of the cutting nozzle and the surface plane of the workpiece remain unchanged (the focus remains unchanged) during the cutting process, so that the cutting effect will not be affected by the change of the workpiece surface;

(2) Method of increasing oxygen pressure (6-8Mpa);

(3) Improve the speed of sharp corner synthesis through software.

About HGTECH: HGTECH is the pioneer and leader of laser industrial application in China, and the authoritative provider of global laser processing solutions. We have comprehensively arranged laser intelligent machine, measurement and automation production lines, and smart factory construction to provide overall solutions for intelligent manufacturing.