Development of special technology and technological equipment for the turbopump assembly turbine blades manufacture using the electrochemical method

Turbine blades machining is one of the most complex stages in production of the liquid rocket engine turbopump assembly. Since the blades are operating in the aggressive environment, they are manufactured of difficult-to-machine heat-resistant materials. The paper analyzes methods for manufacturing the turbine blade workpieces, and substantiates selection of the optimal method, i.e. the isostatic pressing. It presents the results of work on developing the embedded element technology and manufacture. Since mechanical methods are inexpedient, the electrochemical method is used in the workpiece final machining. A special tool and machining equipment are developed to implement the electrochemical processing. The paper shows that isostatic pressing makes it possible to manufacture workpieces with complex geometric shapes having thin edges and small radii. Using the electrochemical method provides high accuracy in the workpiece machining. A technology for manufacturing a turbine with the complex profile was developed and implemented in manufacture ensuring high precision and quality levels in accordance with the design documentation requirements.
EDN: TWXWJL, https://elibrary/twxwjl

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