Numerical control laser cutting technology for metal pipes

At present, China has developed into the world's largest steel production and consumption country. 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 been introduced, with TRUMPF, BLM, MAZAK as Representative foreign famous laser companies 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 has been widely used, domestic such equipment is still in the research and development stage, and The corresponding process and technology research is getting more and more 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 spreading in China. The rapid growth of demand for CNC cutting talents and laser tube cutting technology also highlights the serious shortage of laser tube cutting equipment and CNC cutting talents and processes. Lag. As a result, the cutting efficiency is low, the cutting quality is poor, and the pipe is seriously wasted. This article will introduce and analyze the main technical issues of laser tube cutting and provide targeted solutions.

1. Large-length metal pipe full-stroke automatic laser cutting and cutting

For the process requirement of full-length automatic laser cutting and cutting of large-length metal pipe, a unique double-drive pneumatic chuck rotating mechanism (active shaft W, driven shaft W1) and left-side active shaft W-axis pneumatic chuck are adopted in the mechanical structure. The rotating mechanism is fixed, the pipe is clamped, and the pipe is cut by the X, Y, W movement of the machine tool, and the right-hand driven shaft W1 pneumatic chuck rotating mechanism can move along the workpiece along the workpiece axis, which can achieve large Length metal pipe full-stroke automatic laser cutting and cutting.

2, CNC cutting technology

CNC cutting is a large-volume, high-efficiency, high-quality cutting production method for tubes. The core of CNC cutting is CNC cutting system. At present, the quality problems existing in the laser tube cutting process are as follows: the part is cut off, the corner of the part is over-burned, the cutting surface is tilted, and the circular part is deformed when the circular part is cut or can not be closed, which directly leads to serious waste of the pipe 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 the cutting operation workers can use the control system to achieve high-quality, high-efficiency CNC cutting.

3, professional pipe nesting technology

CNC laser tube cutting is more complicated due to high cutting efficiency. If used improperly, it will result in tube waste and low cutting efficiency. Through the professional tube cutting and nesting software, the drawing, nesting and blanking sections are pre-programmed on the computer to generate the NC cutting program, and then the full length automatic metal laser cutting and cutting of the large length metal pipe is performed. The professional pipe nesting software is the basis and precondition for realizing high-volume, high-efficiency and high-quality cutting production of CNC pipe cutting machine.

4, pipe cutting process

Due to pipe cutting (especially for square pipe with small pipe diameter), the slag adheres 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 is often overheated, the corner and the square pipe are four. The corners are too hot, which seriously affects the quality of the incision and can't even be cut. For such problems, you can use:

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

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

(3) Improve the sharp corner synthesis speed by software.

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Tag: metal pipe CNC laser cutting technology

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