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Method and apparatus for turbine blades milling with once clamping

A steam turbine blade, one-off technology, applied in milling machine equipment, milling machine equipment details, metal processing equipment, etc., can solve the problems of long technical preparation and processing cycle, difficult alignment and alignment, high blade processing cost, and shorten the time Effects of technical preparation and production cycle, improved machining accuracy and product quality, short programming time

Inactive Publication Date: 2005-05-11
DONGFANG TURBINE CO LTD
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Problems solved by technology

For the above rough machining on ordinary machine tools, only one processing surface can be milled at a time, and each processing surface must be milled by multiple processes, and each milling process must be re-clamped with a set of special clamping fixtures to re-clamp the workpiece It is very difficult to find the center and position at the time, and there are inevitably shape and position errors. Not only is it difficult to ensure the machining accuracy and affect the product quality, but also because of multiple clamping, technical preparation and long processing cycles, the work efficiency is very low. At the same time, the used There are many fixtures and high manufacturing costs, resulting in high blade processing costs

Method used

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  • Method and apparatus for turbine blades milling with once clamping
  • Method and apparatus for turbine blades milling with once clamping
  • Method and apparatus for turbine blades milling with once clamping

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Embodiment Construction

[0052] Now take the processing of moving blades of X300A202001A-005A (1-5 stages of medium pressure cylinder) as an example to illustrate the present invention.

[0053] The first step to process a qualified blade is to establish an accurate blade model. According to the modeling requirements of the other steel rough moving blades in Turbsoft software, it is divided into the following parts and uses different software to complete its modeling work: blade body profile, blade root platform, blade crown platform and blank size setting. Since Turbsoft software has no surface modeling function, the primary modeling of the airfoil surface must be completed with MasterCAM software, and the secondary modeling of the airfoil surface and the setting of the blade root platform, blade crown platform and blank size are completed in Turbsoft software.

[0054] see figure 1 : One-time modeling of blade body profile, first input the discrete points of each section provided by the profile dia...

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Abstract

A technology for milling the blade of steam turbine by fixing it on the 5-coordinate numerally controlled machine-tool once includes such steps as improving the coarse machining module of Turbsoft program for 5-coordinate numerally controlled machine tool by adding the blade-milling module, fixing the steel blank of blade onto said machine-tool, and milling under the control of said program.

Description

technical field [0001] The invention relates to a processing method of a steam turbine blade, in particular to a method and a device for one-time clamping of the blade on a machine tool for milling and forming. Background technique [0002] At present, the Chinese steam turbine manufacturing enterprises represented by the applicant, when milling steam turbine blades, because the rough machining module set by the software of the milling machine control system (TurbSoft software introduced by Swiss LIECHTI company in my country in 1999) has not carried out secondary development, it cannot be processed in five years. The last time the coordinate machine tool was clamped and processed, it was only divided into two major processing steps: first, on the ordinary machine tool, the blade square steel blank was chamfered on the back-arc steam outlet side, the back-arc steam inlet side was chamfered, and the inner arc profile was milled. The rough milling of the steam inlet side of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23C3/00
Inventor 李开玉
Owner DONGFANG TURBINE CO LTD
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