Technical analysis of fiber CNC laser tube cutting machine

Preface

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 (laser oem) equipment products for cutting pipes and other three-dimensional workpieces have come out one after another, with TRUMPF, Well-known foreign laser companies represented by BLM and MAZAK already have a large number of high-end laser tube processing equipment used in actual industrial production, especially in the automobile manufacturing industry, petroleum exploration, machinery manufacturing, and metal tube processing. This type of equipment is still widely used in China. In the research and development stage, the corresponding process and technology research has also received more and more attention from relevant experts and domestic laser companies.

With the rapid growth of metal tube production and consumption in my country, tube laser cutting equipment is rapidly popularizing in my country. The rapid growth in demand for CNC cutting talents and laser tube cutting technology also highlights the serious shortage and technology 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 wasted seriously. This article 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 process requirements of full-stroke automatic laser cutting and blanking of large-length metal pipes, a unique dual-drive pneumatic chuck rotating mechanism (active shaft W, driven shaft W1) is adopted in the mechanical structure, and the left driving shaft W-axis pneumatic chuck The rotating mechanism is fixed and the pipe is clamped, and the pipe is cut and processed by the X, Y, and W movements of the machine tool. The right driven shaft W1 pneumatic chuck rotating mechanism can move along the axis of the workpiece with the worktable, which can achieve large Full-stroke automatic laser cutting and blanking of length metal pipes.

2. CNC cutting technology

CNC cutting is a high-volume, high-efficiency and 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 such as overburning of the cutting point of the part, overburning of the corners of the part, inclined cutting surface, and deformation or inability to close the circle when cutting round parts, etc., directly lead to serious waste of the tube and cutting production low efficiency.

The 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 operators can achieve high-quality and high-efficiency CNC cutting through the proficient use of the control system.

3. Professional pipe nesting technology

Due to the high cutting efficiency of CNC laser tube cutting, programming nesting is more complicated. If used improperly, it will cause tube waste and low cutting efficiency. Through professional pipe cutting and nesting software, pre-program drawing, nesting, and blanking on the computer to generate NC cutting programs, and then perform full-stroke automatic laser cutting and blanking of large-length metal pipes. Professional pipe nesting software is the basis and prerequisite for realizing large-volume, high-efficiency and high-quality cutting production of CNC pipe cutting machines.

4. Pipe cutting process

When the pipe is cut (especially for the square pipe with small pipe diameter), the molten 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 high, the pipe tends to overheat, corners and square pipes. Overburning of the corners seriously affects the quality of the incision, even unable to cut. For such problems, the following can be used: (1) The laser cutting head with a height sensor follow-up system can ensure that during the cutting process, the height of the cutting nozzle and the surface of the workpiece remains unchanged (the focus remains unchanged), so that the cutting effect does not vary with the workpiece The surface changes are affected; (2) The method of increasing the oxygen pressure (6-8Mpa); (3) The speed of sharp corner synthesis is increased through software.

The above method can solve the problems of "overburning" and slagging in pipe cutting.

Laser tube cutting technology is in the process of rapid development and continuous improvement. With the continuous update and development of computer technology, mechanical structure, cutting technology and optimization algorithms, CNC laser tube cutting technology will more prominently show its intelligence, speed and optimization The cutting process and skills of the laser tube cutting machine provide technical guarantee for the efficient cutting and high-quality cutting of the laser tube cutting machine, as well as the saving of tube materials and energy consumption.