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 vanes and final blades. . Below, the editor will briefly introduce to you the main processing difficulties of large blades in impeller processing.

The difficulties in processing large blades in impeller processing include the following three aspects: milling the girdle, processing the blade root, and milling tie rib holes.

Since the material of the large blades is forgings, the profile part of the forgings is different from the value of the wheel, so the profile pads poured out of the low melting point alloy cannot match each blade. During processing, after the upper and lower pressure plates are pressed tightly, The gap between the blade profile and the profile pad deforms the processed profile, causing unstable dimensional control at the shroud, resulting in scrapping.

The processing of blade roots is a difficult problem in blade processing. Due to the complex shape lines and high precision requirements, it has always been a headache for operators. Especially the fork-shaped blade roots of large blades not only have their own accuracy problems, but also Deformation problems caused by stress relief.

Most of the difficulties in processing tie-bar holes are due to different blade root deformations and non-coinciding radiation lines, which lead to changes in the position of tie-bar holes and produce waste products. On the other hand, due to the deformation of the molding line, the gap between the molding line spacer and the molding line is inconsistent and the severe deformation is inconsistent.