At present, China has developed into the world's largest producer and consumer of steel. In recent years, in order to meet the needs of the industrial market, various laser processing equipment products for the cutting of pipes and other three-dimensional workpieces have been introduced one after another. Take TRUMPF, BLM, and MAZAK as The representative foreign laser companies already have a large number of high-end laser tube processing equipment for practical industrial production, especially in the automotive manufacturing industry, oil exploration, machinery manufacturing, metal pipe processing are widely used, domestic equipment is still in the R & D stage, and The corresponding research on technology and technology has also received increasing attention from relevant experts and domestic laser companies.

With the rapid growth of metal pipe production and consumption in China, pipe laser cutting equipment is rapidly gaining popularity in China. The rapid growth in demand for CNC cutting talents and laser cutting technology also highlights serious shortages of laser cutting equipment and CNC cutting talents and processes. Lag. As a result, the cutting efficiency is low and the cutting quality is poor, resulting in serious waste of the tubing. This article will introduce and analyze the main technical issues surrounding laser cutting and provide targeted solutions.

1. Large-length metal pipe full-stroke automatic laser cutting and blanking For the full-stroke automatic laser cutting of large-length metal pipes, the unique requirements of the double-drive pneumatic chuck rotating mechanism (active shaft W, follower Axis W1), the left side of the drive shaft W axis pneumatic chuck rotation mechanism is fixed, the pipe clamped, through the machine X, Y, W movement on the pipe cutting, the right side of the output shaft W1 pneumatic chuck rotation mechanism With the workbench along the workpiece axis movement, can achieve large-length metal pipe full-stroke automatic laser cutting.

2. CNC Cutting Technology CNC cutting is a high-volume, high-efficiency, high-quality cutting production method for pipes. The core of CNC cutting is the CNC cutting system. At present, the quality problems existing in the laser tube cutting process include: excessive burning of the cutting point of the parts, overheating of the corners of the parts, incline of the cutting surface, and deformation or inability of closing of the circle when the circular parts are cut, which directly leads to serious waste of the tubes and cutting production. low efficiency.

CNC cutting technology is the cutting control software of the index control system to provide advanced cutting technology and rich cutting experience, so that cutting operation workers can use skilled control systems to achieve high-quality, high-efficiency CNC cutting.

3, professional pipe nesting technology CNC laser cutting due to high cutting efficiency, programming nesting more complex, if used improperly, it will result in waste pipe and cutting efficiency. Through the professional pipe cutting software on the computer beforehand drawing, nesting, cutting and programming, to generate NC cutting program, and then the full length of the metal pipe full length automatic laser cutting. Professional pipe nesting software is the basis and prerequisite for realizing high-volume, high-efficiency and high-quality cutting production of CNC pipe cutters.

4, pipe cutting process As the pipe cutting (especially for small diameter square pipe), the slag is attached to the pipe wall, most of the heat generated by cutting is absorbed by the workpiece, when the cutting density is large, it will often cause the pipe to overheat, The corners and the corners of the square tube are overheated, which seriously affects the quality of the incision and can not even be cut. For such problems can be used:

(1) The laser cutting headband height sensing servo system can ensure that the height of the cutting nozzle and the workpiece surface remains unchanged (the focus does not change) during the cutting process, so that the cutting effect is not affected by the change of the workpiece surface;

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

(3) Increase the sharp angle synthesis speed by software.