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A method for detecting the steam passage allowance of steam turbine blades using a tool setter

A steam turbine blade and blade steam channel technology, which is applied in instruments, computer control, general control systems, etc., can solve the problems of not being able to mill the steam channel profile, scrapping steam turbine blades, and insufficient machining allowance of five-axis CNC machine tools. The effect of scrap rate control

Active Publication Date: 2016-09-28
HARBIN TURBINE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the large blades after rough milling by four-axis CNC machine tools are deformed after heat treatment during finishing machining by five-axis CNC machine tools, which will lead to insufficient machining allowance on five-axis CNC machine tools, and complete steam can not be milled out. This leads to the scrapping of steam turbine blades during the finishing machining of five-axis CNC machine tools, and proposes a method of using a tool setting instrument to detect the steam passage margin of steam turbine blades

Method used

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Experimental program
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specific Embodiment approach 1

[0012] Specific embodiment 1: A method of using a tool setting instrument to detect the steam passage allowance of a steam turbine blade in this embodiment is characterized in that a method for using a knife setting instrument to detect the steam passage allowance of a steam turbine blade is specifically prepared according to the following steps :

[0013] Step 1. Select the tool setting instrument, and replace the selected tool setting instrument with the steam turbine blade processing tool of the five-axis CNC machine tool; the selected tool setting instrument is: the tool setting instrument has a spherical probe with a carbide head. There is a lithium battery inside, when the spherical probe of the tool setting instrument is in contact with the blade to be tested, the red light on the tool setting instrument will be on; if the spherical probe of the tool setting instrument is not in contact with the blade to be tested, it will not be on ;And the probe of the tool setting in...

specific Embodiment approach 2

[0018] Specific embodiment two: the difference between this embodiment and specific embodiment one is: in step two (3), the specific process of the knife setting instrument performing a round of knife movement along the steam channel according to the gear height of each comprehensive measuring tool It is as follows: firstly, according to the margin of the blank of the blade is 1.5mm~2mm, the tool setting instrument is set to 1mm according to the normal direction of the steam channel, and the knife is moved along the steam channel for a week. If the margin of the molding line at this gear reaches 1.2mm, it indicates that the blade to be tested can be processed normally in the subsequent process. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0019] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that if the red light of the tool setting instrument is off, adjust the margin of the gear position of the steam path in the five-axis program to 0.5mm. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention provides a method for detecting gas turbine blade gas passage surplus by utilizing a cutter setting instrument, and relates to the method for detecting the gas turbine blade gas passage surplus. The provided method for detecting the gas turbine blade gas passage surplus by utilizing the cutter setting instrument aims at solving problems that a blade gas passage cannot be completely milled caused by processing surplus insufficiency of a blade work-blank on a five-axis numerically-controlled machine tool. The method comprises the following steps: step one: the appropriate cutter setting instrument is selected; and step two: the blade gas passage surplus is detected, and detection comprises that (1) a blade to be detected is clamped on the five-axis numerically-controlled machine tool provided with the cutter setting instrument; (2) a detection program used for controlling the five-axis numerically-controlled machine tool provided with the cutter setting instrument is compiled; and (3) movement of the five-axis numerically-controlled machine tool is driven by utilizing the aforementioned detection program so that the steps of the method for detecting the gas turbine blade gas passage surplus by utilizing the cutter setting instrument are completed. The invention is applied to the method for detecting the gas turbine blade gas passage surplus.

Description

technical field [0001] The invention relates to a method for detecting the air passage margin of a blade. Background technique [0002] At present, when a large blade of a steam turbine is processed in the workshop, the large blade after rough milling by the four-axis CNC machine tool often fails to mill out a complete steam channel profile when the five-axis (Ferrari) CNC machine tool is finished. The reason is that due to the use of the large blade blank after four-axis rough milling, the deformation after heat treatment and other comprehensive factors lead to insufficient machining allowance on the five-axis CNC machine tool, so that the blade steam channel cannot be completely milled out, and then scrapped. Contents of the invention [0003] The purpose of the present invention is to solve the problem that the large blades after rough milling by four-axis CNC machine tools are deformed after heat treatment during finishing machining by five-axis CNC machine tools, whic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/401
Inventor 付贵言郭长辉王巍李岩李变弟孙珂詹春辉张强尹昕刘蓉董生权
Owner HARBIN TURBINE
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