Domestic Development Trend And Characteristics Of Pipe Bending Machine Industry

With the development and progress of science and technology, the machine tool products of the pipe bending machine and pipe processing machinery industry also have a leap forward in reform and replacement, which benefits from the demand for the pipe bending machine pipe processing machinery and equipment industry in China in recent years. In recent years, with the progress and development of China's society, the development of many related supporting facilities in the machine tool industry, such as pipe bending machine, pipe cutting machine, pipe shrinking machine and other pipe processing equipment, in the face of years of scientific and technological research and development and innovation, pipe bending machine, hydraulic pipe bending machine, automatic pipe bending machine, CNC pipe bending machine development.
Our pipe bending machine industry involves the processing needs of various industries, so there must be innovative progress in flexibility and hyperactivity. In this way, single pipe bending machine, single head pipe bending machine and hydraulic pipe bending machine can not meet the needs of comprehensive development. Therefore, CNC pipe bending machines and automatic pipe bending machines have been developed, and in the past, imported pipe bending machines have been relied on to support high-tech industry needs.
At present, we can completely independently develop and manufacture, but also tailor-made for users. According to the material and processing characteristics to match the relevant models. It can be modified or completely designed from the original model.
There are many different pipe bending processes in practice, and there can be a variety of different classifications from different perspectives. In the project, it is usually divided into cold bending pipe and hot bending pipe according to whether the bending pipe is heated or not, and it is divided into core bending pipe and coreless bending pipe according to whether there is filling when bending, and stainless steel pipe, especially thin-walled stainless steel pipe, adopts cold bending method.
The cold bending method is to bend the pipe at normal temperature, because the pipe bending machine does not need to be heated, it is more suitable for bending stainless steel pipe, aluminum pipe and copper pipe. The commonly used cold bending method is rolling bending (rolling machine - winding machine). This paper mainly introduces the related problems of pipe fittings in the process of drawing and bending, pushing and pressure bending. Under normal circumstances, the bending radius of cold bending should not be less than 1.5 times the diameter of the pipe. Because the pipe has a certain elasticity. However, after the external force applied during bending is eliminated, the pipe will bounce back at an Angle, and there must be a certain amount of overbend rebound when bending. The size of the rebound amount is related to the mechanical properties of the pipe material, the wall thickness and the size of the bending radius, and the general rebound Angle of the copper pipe is about 2-5 degrees.
Tensile bending is to clamp the pipe on the bending wheel die, and rotate with the bending die. When the pipe is pulled over the press block, the press block will squeeze the pipe on the wheel die, which belongs to the forming die bending process. With the development of CNC pipe bending machine and CNC machine tool industry, using advanced CNC pipe bending machine to achieve bending process can greatly improve production efficiency and ensure product quality. Because it can easily adjust the process parameters, the CNC pipe bending machine is accurate and stable to complete the straightening, rounding, feeding, bending and other processes. The bending accuracy of the control is guaranteed. However, the quality of the curved copper pipe is more sensitive to the process parameters, so it requires sufficient preliminary preparation and trial production work, especially the curved thin-walled copper pipe, if the process parameters are not selected properly, it is easy to wrinkle, resulting in the scrap of the workpiece. How to obtain these process parameters efficiently and accurately to fully ensure the quality of bending products. It is a research pilot of CNC pipe bending machine technology.
Machinery industry analysts pointed out that the product structure of domestic pipe bending machine and metal circular saw machine industry has been continuously optimized and has shown three characteristics: First, with the continuous development of industry and the continuous progress of technology, pipe shrinking machine products show a trend of large (heavy) type and super-heavy direction; Second, middle and high-end high speed and high precision forming machine tools have become the mainstream and focus of market demand.