China's machine tool industry after several years of rapid development, whether it is the host industry or the functional parts industry has made great progress, but relatively speaking, the speed of development of the functional parts industry to lag behind the host industry, is the short board of the development of CNC machine tool industry, the machine tool functional parts support still need to increase. High-speed, high-precision, five-axis linkage, composite machine tools are the main direction of the development of machine tools in the future, and the functional parts of machine tools are bound to develop around this theme, so as to meet the needs of machine tool manufacturers. It can be said that since the innovation has been the direction of manufacturers' efforts, development is the forward goal of manufacturers, with such a concept, China's CNC industry is bound to achieve greater competitiveness in the world.
After the rapid economic development in the 1990s, the demand for infrastructure construction such as plants, equipment, and transportation facilities has increased sharply, and the production of various metal pipes has been far from meeting the demand, and the shape requirements of many metal pipes have been increasingly complicated, which has spawned the system design and development. The traditional two-dimensional type can no longer meet the complex industrial needs. It is under this background that 3D is gradually developed and matured. The application of programmable controller (PLC) in the control system provides the technical guarantee for the complex requirements of the pipe bending system. Until now, due to the rise of domestic air conditioning, automotive and other industries, the demand for CNC Tube Grooving has changed from quantity to quality, so it also gave birth to the leap of CNC Tube Grooving technology, CNC technology has finally been introduced into the industry, CNC intervention is a technological revolution in the bending industry. No matter from the bending speed, accuracy has a considerable leap.
Due to the different process objects and processes of various types of numerical control, the structure of numerical control mainly adopts three ways:
① Direct use of numerical control system. The advantage is that the "degree of freedom" of programming is high, which can be programmed according to different bending requirements and avoid mechanical interference, but the programming quality requirements of personnel are improved. Generally, the input of bending XYZ geometric coordinate data is not supported.
(2) Adopt programmable controller PLC, position/speed control unit, touch screen, AC servo drive unit combined control mode. The organic combination of PLC ladder diagram, SFC programming control position/speed unit and touch screen directly input the bending data, supporting the conversion of bending XYZ geometric coordinate data to bending YBC processing data. High hardware reliability, software easy to maintain and re-develop.
③ Industrial grade computer, servo motion control board, AC servo unit. The software is realized by visual programs such as VC or VB, which can make full use of computer resources and is mostly used for complex mechanical equipment such as motion process and mechanical trajectory. In addition to the functions of the second method, the function of coffin processing machinery interference is also added. The hardware reliability is slightly lower than that of PIC systems. We use PLC, position/speed control unit, touch screen, AC servo drive unit combined control mode. The designed system has manual and automatic operation modes, and the automatic mode can be divided into step following bending and origin through bending, which is convenient for processing a variety of bending pipes. For the pipe fittings with different bending radius, the upper and lower die switching is used to realize the bending process. For bending pipe with special processing requirements, linkage, decomposition and corresponding auxiliary actions are designed to avoid mechanical interference and realize the automation of bending process. Today we and our experts mainly introduce the design of the control program based on the Mitsubishi position/speed control unit. For the automation device with position and speed control requirements, the hardware uses PLC, position/speed unit, AC servo unit, etc., and the software uses ladder diagram and SFC diagram. In the case of cost-effective, reliability and other requirements, it is a better system solution.
CNC Tube Grooving https://www.john-sheng.com/CNC-Tube-Grooving
