Fixture used for processing small moving blade in turbine and processing method thereof

Abstract

The invention provides a fixture used for processing a small moving blade in a turbine. The fixture comprises a transmission body and an installation disk of the transmission body, wherein the transmission body is fixed on the installation disk; a dovetail groove is arranged on the end surface of the transmission body for installing a blade blank; the blade blank is provided with a process tenon which is of dovetail shape and is adaptive with the dovetail groove; a linear hydraulic cylinder is arranged in the transmission body, and a piston rod of the linear hydraulic cylinder corresponds to the process tenon; an energy storage and a pressurizing port are arranged on the transmission body; the pressurizing port is connected with a hydraulic station; the hydraulic station is used for pressurizing the linear hydraulic cylinder and the energy storage simultaneously by the pressurizing port; and the energy storage is used for maintaining the system pressure. The invention can realize the one-time clamping of a workpiece on a milling machine, has strong commonality and saves the cost of the fixture; the modularization centralized processing can be realized, so that the processing technique is simple, thereby greatly improving the working efficiency, shortening the production period, improving the processing accuracy and lowering the labor intensity; in addition, the processing period is shortened by 30%, and the fixture in category II can be saved by 40%.

Description

technical field [0001] The invention relates to the processing of blades in industries such as steam turbines and blowers, in particular to the design of a jig for processing small moving blades in steam turbines and the improvement of the blade processing method. Background technique [0002] In the past, in the machining of small and medium-sized moving blades (the length of the steam channel profile is within 350mm) in the steam turbine manufacturing industry, due to the limitation of the machine tool capacity, the workpiece had to be clamped three times on three different machine tools to complete the machining of the blades. Therefore, three datum surfaces must be processed first, and as the positioning datum of the secondary clamping, at least three sets of fixtures with different structures are required. As a result, there are many types of fixtures used in the blade processing process; and each fixture is designed for the specific specifications of the blades, which ...

AI Technical Summary

Problems solved by technology

However, the current processing technology has not been improved accordingly, and the original processing technology is still followed. Correspondingly, the fixture has not been improved, and the old structure fixture is still used, resulting in low processing efficiency, limited processing accuracy, and superior performance of the machine tool. not well applied

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