Three-axis numerically-controlled milling machine milling method and device for semi-open type impeller of variable-cross-section twisted blades

Abstract

The invention discloses a three-axis numerical control milling machine milling method and device for a semi-open impeller with variable section twisted blades. The steps are as follows: 1. Use software (Solidworks) to make a three-dimensional model of the semi-open impeller, save it as IGS format and import it into UG4 .0 for programming; 2. Use the lathe for pre-milling processing; 3. Place the pre-milling workpiece upright on the milling machine worktable in the direction parallel to the Z-axis of the milling machine, with the shaft disc facing up, and mill out a diameter equal to the number of blades. After waiting for the polygon, remove it, install the mandrel and the connecting plate, and fix it after leveling and centering; 4. Import the program 1 and 2 for processing; 5. Fix the blanks that have completed the 1 and 2 sequences on the indexing through the connecting plate On the disc, use the equal polygon edges on the impeller chuck, the indexing disc and the shaft disc to level and align, and complete the third sequence processing; 5. Remove the reserved craft surface and craft chuck of the shaft disc, and the impeller processing is completed. Compared with the semi-open impeller processed by the five-axis milling machine, the invention greatly saves the processing cost while ensuring the processing accuracy.

Description

technical field [0001] The invention belongs to the technical field of numerical control machining and manufacturing, and relates to a machining method and a machining device for mechanical parts, in particular to a method for machining a semi-open impeller with variable cross-section and twisted blades on an ordinary three-axis numerical control milling machine using special tooling and device. Background technique [0002] Semi-open ternary impeller, as a key power component in fluid machinery, is widely used in aviation, aerospace, energy, chemical and other fields. Its numerical control processing technology has always been an important topic in the machinery manufacturing industry. The semi-open three-way impeller is one of the main parts that work on the working medium in the turbo compressor. Most of them operate in high-temperature, high-pressure, and highly corrosive media. The material is mainly made of precipitation hardened stainless steel-FV520B (17 -4PH materi...

AI Technical Summary

Problems solved by technology

At present, semi-open impellers generally use the five-axis linkage layered milling flow channel processing method, but the five-axis linkage machining cost of the machine tool is large, the processing cycle is long, the efficiency is low, and the processing cost is high.

Images