A Machining Technology of Axial Flow Turbine Blade

Abstract

The invention discloses a processing technology of an axial-flow steam turbine blade. The processing of the steam turbine blade is processed according to the following steps: firstly, the blank square is passed through an ordinary milling machine with an end mill for the end face, and two processes of rough milling and fine milling are firstly processed, and two sides are processed first. , and then take the two sides processed first as the reference plane, process the other two sides, and then use the end mill to process the two ends; on one side, after the two processes of rough milling-finish milling, first process the steam outlet side and Mark "C" on the end surface of the blade root close to the steam outlet side, mark "N" on the surface adjacent to the steam outlet side and form an acute angle is the inner radial surface, and process the remaining three sides into a parallelogram through rough milling-finish milling ;Drill the center hole on the end face of the blade root and the end face of the blade crown; use the end mill to rough-mill the blade shape first, then rough-mill the blade root, and finally rough-mill the blade crown; then install it on the five-axis CNC machining center after alignment, Finishing; Rough sawing of blade root and end surface process head by sawing machine; Inspection of steam turbine blades according to drawing requirements.

Description

technical field [0001] The invention relates to a steam turbine blade, in particular to a processing technology for an axial flow steam turbine blade. Background technique [0002] At present, the structure of the blade at home and abroad mainly includes three parts: the blade root, the blade shape and the blade crown. The blade shape is generally located between the blade root and the blade crown. For this kind of steam turbine blade, it belongs to the moving blade. In the steam turbine, it rotates with the rotor at high speed. The blade is the energy conversion between the air flow and the rotor through the high-speed rotation of the blade. It carries a large mass inertia force, a large aerodynamic force and vibration load, so the blade plays a vital role in the entire steam turbine. Therefore, there must be a corresponding accuracy guarantee for the size of the blade, but the current existing processing technology is relatively backward, the product quality is unstable, t...

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Problems solved by technology

[0002] At present, the structure of the blade at home and abroad mainly includes three parts: the blade root, the blade shape and the blade crown. The blade shape is generally located between the blade root and the blade crown. For this kind of steam turbine blade, it belongs to the moving blade. In the steam turbine, it rotates with the rotor at high speed. The blade is the energy conversion between the air flow and the rotor through the high-speed rotation of the blade. It carries a large mass inertia force, a large aerodynamic force and vibration load, so the blade plays a vital role in the entire steam turbine. Therefore, there must be a corresponding accuracy guarantee for the size of the blade, but the current existing processing technology is relatively backward, the product quality is unstable, the processing method is unreasonable, and the production efficiency is poor.

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