xiehe model

In the processing of impeller blades, the processing of large blades is the most difficult. Not only do you need to master the measures to solve the processing difficulties of large blades, but you also need to have a detailed understanding of the large blades themselves, including moving blades, stationary blades, guide blades and final blades. . Below, the editor will give you a brief introduction to the main processing difficulties of large blades in impeller processing.

There are three difficulties in the processing of large blades in impeller processing: the milling process shroud, the processing of the blade root, and the milling of the reinforcement holes.

Since the material of the large blade is a forging, the profile part of the forging is different from the wheel value, so the profile block cast from the low-melting point alloy cannot match each blade. During processing, after the upper and lower pressure plates are pressed, The gap between the profiled line of the blade and the profiled line pad will deform the profiled line after processing, and the size control of the shroud will be unstable, resulting in scrapping.

The processing of the blade root is a difficult problem in blade processing. Due to the complex profile and high precision requirements, it has always been a headache for the operator, especially the fork-shaped blade root of the large blade, which not only has its own accuracy problems, but also has Deformation problems caused by stress relief.

Most of the reasons for the difficulty in processing the tie holes are that the deformation of the blade root is different, and the radiation lines do not overlap, which leads to the change of the position of the tie holes and the generation of waste products. On the other hand, due to the deformation of the molded line, the gap between the molded line pad and the molded line is inconsistent and severely deformed.