Steam turbine square steel blade fixture

Abstract

The invention provides a steam turbine square steel blade fixture which fixes conveniently and saves materials in processing and is jointed on a driving fixture and a followed thimble on a milling machine by a blade shroud tailstock barrel and a blade root fixture. The rotation center of the blade shroud tailstock barrel and the blade root fixture coincides with the rotation center of the blade. The inner cavities of the blade shroud tailstock barrel and a blade root fixture are the modeling structures of the blade shroud and blade root of the blade. Through fixing the blade by the blade shroud tailstock barrel and the blade root fixture whose centers coincide with the rotation center of the blade, the rotation center of the blade and the milling machine are coincided highly and the processing precision is improved. The fixture does not need drilling the centre holes at two sides of the blade, thus decreasing the procedures and improving the production efficiency.

Description

technical field [0001] The invention relates to a clamp, in particular to a steam turbine square steel blade clamp which is convenient for clamping and saves materials during processing. Background technique [0002] Usually, when performing high-precision machining of steam turbine blades, it is necessary to first determine the center of rotation of the blades on a milling machine. Generally, three thimbles with two thimbles at the root end and one thimble at the crown are used to fix the blade to process it. Using this type of thimble needs to be done in the unformed The thimble hole is processed on the end surface of the blade crown and blade root, and the thimble hole is milled and removed after the processing is completed. This method is used to clamp the blade, and the coincidence degree between the blade and the rotation center of the machine tool is poor, and the machining accuracy cannot be guaranteed. At the same time, it increases The operation steps are shortened...

AI Technical Summary

Problems solved by technology

[0002] Usually, when performing high-precision machining of steam turbine blades, it is necessary to determine the center of rotation of the blades on a milling machine. Generally, three thimbles with two thimbles at the root end and one thimble at the crown are used to fix the blade to process it. Using this type of thimble needs to be done in the unformed The thimble hole is processed on the end surface of the blade crown and blade root, and the thimble hole is milled and removed after the processing is completed. This method is used to clamp the blade, and the coincidence degree between the blade and the rotation center of the machine tool is poor, and the machining accuracy cannot be guaranteed. At the same time, it increases operating steps, reducing production efficiency

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