A tool for heat treatment and shaping of large blades

A large blade and tool technology, applied in the field of large blade heat treatment and shaping tools, can solve the problems that the blade cannot meet, there is internal stress, blade rebound, etc., to achieve stable and lasting clamping effect, improve processing quality, and ensure the effect of assembly requirements.
CN107674959BActive Publication Date: 2019-04-16HARBIN TURBINE +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
HARBIN TURBINE
Publication Date
2019-04-16

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Abstract

The invention discloses a shaping tool for large blade heat treatment. Large blades of a steam turbine can generate deformation and internal stress in machining of air way molded lines and welding ofStellite alloy sheets, so that the quality requirements of the blades are difficult to meet, no working allowance caused by appearance of steam ways in the blades in finishing is generated, the rebound caused by internal stress in the blades in blade assembly is generated, and the blade crown assembly requirements cannot be met in blade assembly. Blade crown parts of the large blades are ejected against blade crown thimble bases; molded line segments of the large blades are matched with molded line positioning bases; air way molded line segments of the large blades are arranged on L-gear molded line positioning blocks; blade root parts of the large blades are clamped on blade root positioning bases; and molded line positioning end surfaces matched with tiepiece molded line segments of thelarge blades are formed among A# molded line pressing end surfaces, B# molded line pressing end surfaces, C# molded line pressing end surfaces, D# molded line pressing end surfaces, G# molded line pressing end surfaces, J# molded line pressing end surfaces and split positioning end surfaces. The shaping tool for large blade heat treatment is used for positioning the large blades.
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Description

technical field

[0001] The invention specifically relates to a heat treatment shaping tool for large blades. Background technique

[0002] There are many types of steam turbine blades, among which the large blade with an air passage length of 1375mm will produce large deformation and internal stress when processing the air passage profile and welding the Stellite alloy sheet, especially the rib boss and the entire Stellite alloy The deformation of the welding part of the blade is relatively large, and the quality requirements of the blade are not met during the blade inspection, and there is no machining allowance for the air passage of the blade during finishing machining. Due to the internal stress inside the blade, springback occurs during blade assembly and even The shroud assembly requirements cannot be met. This requires blade profiling and internal stress removal. Therefore, solving the deformation of the blade after machining and removing the internal stress is the...

Claims

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