Machining method of turbine blade

Abstract

The invention discloses a machining method of a turbine blade. The machining method comprises the following steps: (1) a five-shaft powerful grinding machine and a square box fixture are used; a blade body part of a blade blank is pressed by a pressing screw on the square box fixture; and tenon teeth at the blade root end are grinded in a center line symmetric grinding manner; and (2) the tenon teeth at the blade root end are clamped by clamping tooth blocks on a five-shaft milling machine; the blade root end surface is tightly bonded with the positioning surface of the fixture; a center hole in the top end of the blade is drilled, and is supported; and a blade body curved surface is milled in a high-speed milling manner. The turbine blade machined by the machining method can guarantee the symmetry of the tenon teeth of the turbine blade and the consistency of every turbine blade, reduces the rejection rate from 10% to 0.1%, and improves the production efficiency because of shortening machining procedures.

Description

technical field [0001] The invention relates to a processing method of a turbocharger turbine blade, in particular to a method for processing a turbine blade when the turbine blade blank is a bar material. Background technique [0002] The turbine blades are a group of very core rotating parts that constitute the rotating shaft of the supercharger, and make the entire supercharger run by pushing the turbine blades through the exhaust gas of the diesel engine, and the rotation speed is very high. Therefore, the structure of the turbine blade is complex and its machining accuracy is required to be quite high. If the processing method is unreasonable, the precision of the manufactured blades will not meet the design requirements, resulting in excessive unbalance during rotation, reducing the efficiency of the supercharger, shortening the service life, and customer complaints. At present, the market demand for the quality of the supercharger is also increasing. Therefore, it i...

AI Technical Summary

Problems solved by technology

The turbine blades processed by traditional methods have the following disadvantages: 1. The mass difference between each turbine blade is large, which brings great trouble to assembly and dynamic balance; 2. The scrap rate of turbine blades is relatively high, about 10%; 3. .The relative profile of the curved surface of the blade body of the turbine blade and the tenon teeth at the blade root end is out of tolerance, resulting in uneven blade area after assembly and reducing the boosting efficiency

Therefore, it has been proved that traditional manufacturing methods cannot meet the quality requirements of turbine blades, nor can they meet the increasing market demand.

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