威廉希尔官方下载Mar 12, 2020
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, a variety of laser processing equipment products for pipe and other three-dimensional workpiece cutting have come out one after another, with TRUMPF, BLM, MAZAK as The representative foreign well-known 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 mining, machinery manufacturing, and metal tube processing are widely used. Such domestic equipment is still in the research and development stage, and Corresponding process and technology researches are increasingly valued by relevant experts and domestic laser companies.
With the rapid growth of China's metal pipe production and consumption, pipe laser cutting equipment is rapidly popularizing in China, and the rapid growth in demand for CNC cutting talents and laser tube cutting technologies has also highlighted 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 problems of laser tube cutting, and provide targeted solutions.
1. Full-length automatic laser cutting and cutting of large-length metal pipes
For the technical requirements of full-length automatic laser cutting and cutting of large-length metal pipes, a unique dual-drive pneumatic chuck rotation mechanism (active axis W, driven axis W1) is used in the mechanical structure, and the left active axis W axis pneumatic chuck Rotating mechanism is fixed, the pipe is clamped, and the pipe is cut by X, Y, and W movements of the machine tool. The right driven shaft W1 pneumatic chuck rotation mechanism can move along the workpiece axis along the table, which can achieve large Full length automatic laser cutting and cutting of full length metal pipes.
2. CNC cutting technology
CNC cutting is a large-scale, high-efficiency, high-quality cutting production method for pipes. The core of CNC cutting is the CNC cutting system. At present, there are quality problems in the laser tube cutting process, such as overburning of the cutting point of the part, overburning of the corner of the part, tilting of the cutting surface, and circle deformation or failure to close when cutting round parts, which directly leads to serious waste of pipe and cutting production. low efficiency.
CNC cutting technology is the cutting control software of the index control system, which provides advanced cutting technology and rich cutting experience, so that cutting operators can use high-quality and high-efficiency CNC cutting through the skilled use of the control system.
3. Professional pipe nesting technology
Due to the high cutting efficiency of CNC laser tube cutting, the programming of nesting is more complicated. If it is not used properly, it will cause waste of pipe and low cutting efficiency. The professional tube cutting and nesting software is used to pre-program the drawing, nesting and blanking on the computer to generate an NC cutting program, and then perform full-length automatic laser cutting and cutting of large-length metal pipes. Professional pipe nesting software is the basis and prerequisite for realizing high-volume, high-efficiency, high-quality cutting production of CNC pipe cutting machines.
4. Pipe cutting process
Due to pipe cutting (especially for square pipe with small diameter),dissolved slag adheres to the inner wall of the tube, and most of the heat generated by cutting is absorbed by the workpiece. When the cutting density is large, the tube material will often be overheated, and the corners and the four corners of the square tube will be overburned, which will seriously affect the quality of the incision and even fail to cut. To solve such problems: (1) The laser cutting headband height sensing 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 is unchanged), so that the cutting effect does not follow the workpiece The surface changes are affected; (2) the method of increasing the oxygen pressure (6-8Mpa); (3) the sharp angle synthesis speed is increased by software.
The above methods can solve the problems of "overburn" and slag hanging in the 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 show its intelligence, speed and optimization more prominently. The cutting process and technology provide technical guarantee for the efficient cutting and high-quality cutting of the laser tube cutting machine, as well as saving pipe and energy consumption.