Hot Rolling Process of Mixed Flow Pump Impeller

Hot Rolling Process of Mixed Flow Pump Impeller
At present, there are three kinds of processing methods of mixed flow pump impellers at home and abroad: (1) sand casting and grinding processing; (2) sand casting CNC machining; (3) molding hot bending (1/2 CNC machining). The first method is simple, but the labor intensity of workers, foreign has been rarely used, and domestic also as the main method of processing leaves. The second method of processing out of the leaves of high precision, but the cycle is long, there is not enough domestic five-axis milling bed to meet the requirements of the production schedule. The third method to obtain the blade surface and internal performance are good, but also to meet the general product production requirements. However, the pressure technology has been limited to the curvature of the change is not limited, the thickness of the more uniform leaves, for the sculpture body surface of the Francis turbine runner blade pressure technology remains to be further studied. Three Gorges unit mixed flow pump single output 7lOMW, wheel diameter IOm, a single leaf weight 18t. Our company to small Danjiang power station turbine rotor blades as the middle of the leaves, made a series of hot pressing process attempts, including hot pressing hot pressing mold design and manufacturing is a crucial link