What’s the Processing and Production Methods of Large Flange Rings?

What’s the processing and production methods of large flange rings?

Large flange ring parts are widely used in many industrial fields such as wind power generation, machinery, shipbuilding, petrochemical industry, aerospace, etc. Large diameter flange manufacturers believe that the production of large flange ring parts nowadays mainly includes the following Methods:

1.The way of integral forging forming. The blank under high temperature is forged into a pie shape, the middle part is punched, and then forged into a ring. This method not only has a very low material utilization rate and a long processing cycle, but also the processed ring blanks often fail to reach Accuracy requirements, with the advancement and development of technology, the use of this method to process large rings has gradually been eliminated;

2.The way of ring rolling. Ring rolling is also called ring rolling or reaming. It is to send the forged ring blanks into the ring rolling machine at a high temperature. After several times of rolling, the wall thickness of the ring is reduced and the diameter is enlarged. , Continuous partial plastic processing and forming process for section profile forming. This method requires a complete set of large forging and rolling equipment, and the rolling process is subject to the coupling effect of statics, kinematics, dynamics and other factors, and the rolling deformation of the ring It has a high degree of complexity, but also has the disadvantages of difficult equipment operation, large floor space, and large energy consumption.

Rolling forming has become the main production method of large ring parts. Foreign scholars have conducted a lot of research on this production process from many aspects. Domestic research on rolling and forming has become more and more in-depth, and certain results have been achieved. The first SOOOmm diameter and axial CNC ring rolling machine developed by Xi’an Heavy Machinery Research Institute for rolling large aluminum alloy rings has a high Features such as precision, high efficiency, large diameter, and high torque.

3.The method of precise bending and forming. The main process flow of this method is precise bending, end removal, welding groove, and tailor welding to form a circular flange. Because of the large size of the ultra-large flange ring, it will encounter difficulties in the overall processing and transportation. Therefore, it must be processed in sections. The 12m flange of the China Manned Space Simulator KM6 is processed by this process. Compared with the process of producing ring parts such as rolling, the use of the bending forming process to process large flanges has the advantages of high production efficiency, small processing volume, simple equipment and low energy consumption. It is of great significance to apply the bending process to the production of large flange ring parts.