Study on Welding Deformation of Imported Material Fan Impeller
Austenitic stainless steel has good plasticity and toughness, so that it has good processing properties, especially in stamping, bending and so on. However, due to its small thermal conductivity and large linear expansion coefficient, the welding is prone to large deformation in the free state. After the welding of the impeller blades in the manufacturing process, the 8mm bottom plate has been severely deformed. From the front of the impeller, the impeller is tilted upwards, and the maximum size of the upward tilt is 11mm. This deformation deforms the eight blades and the bottom plate of the entire impeller. The impeller bottom plate produces a flexural deformation, which is produced by the combination of longitudinal contraction deformation and lateral contraction deformation. However, the force condition of the impeller blades is much more complicated than that of the bottom plate. The blades are not only subjected to the pulling force of the central root, but also the outer end of the impeller is warped upwards to the outer end of the blade, so that the entire blade is subjected to a huge force. The lower part of the blade (welded side) is transmitted to the upper part of the blade, and the 4mm wide blade is warped upward by nearly 10mm. At this time, a series of changes will occur in the grain structure of the metal inside the stainless steel blade. These changes will cause damage to the overall performance of the fan impeller, and the crack generated under the action of stress alternating will also become the fatigue source of the blade. Impeller processing manufacturing process analysis. Ningbo air compressor impeller is made up of blades and hubs. The key to the impeller machining technology is the high dynamic balance requirements, so the processing method is very important. The blade and the hub can adopt more mature processing technology, such as the blade is processed by the forming process, and the wheel hub is processed by CNC machine tool. Therefore, the quality of the single blade and the hub can fully meet the process requirements, and the key link affecting the quality of the impeller is the welding. Link. Cnc Conveyor,Conveyor Belt Joint Machine,Belt Conveyor Machine,Conveyor And Machine Nantong Sika Machinery Co., Ltd. , https://www.sikamachinery.com