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Positioning fixture for regulating stage blade and method for machining blade steam passage profile by using fixture

A technology of blade positioning and adjustment level, which is applied in the field of blade positioning fixture and processing of blade steam channel profile, blade positioning fixture of adjustment level and processing of blade steam channel profile by fixture, which can solve the problem of poor processing dimensional accuracy and unsatisfactory polishing process. Drawing accuracy requirements and other issues to achieve the effect of ensuring product quality and processing accuracy

Active Publication Date: 2018-05-08
HARBIN TURBINE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of the poor processing dimension accuracy of the three steam channel profiles of the regulating stage blades in the prior art, and the polishing process cannot meet the accuracy requirements of the drawings, the present invention further proposes a positioning fixture for the regulating stage blades and a method for processing the steam channel profiles of the blades using the fixtures

Method used

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  • Positioning fixture for regulating stage blade and method for machining blade steam passage profile by using fixture
  • Positioning fixture for regulating stage blade and method for machining blade steam passage profile by using fixture
  • Positioning fixture for regulating stage blade and method for machining blade steam passage profile by using fixture

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specific Embodiment approach 1

[0022] Specific implementation mode one: combine Figure 1-Figure 5 Describe this embodiment, the adjustment stage blade positioning fixture described in this embodiment includes a clamp body 1, a first positioning block 2, a second positioning block 3, a top wire positioning assembly 4 and a top block 5, and the clamp body 1 is plate-shaped body, the clamp body 1 is fixedly installed on the workbench of the machine tool, the first positioning block 2 and the jacking wire positioning assembly 4 are arranged oppositely, and the first positioning block 2 and the jacking wire positioning assembly 4 are relatively fixedly installed on the upper end surface of the clamping body 1 , the second positioning block 3 is installed on the tailstock of the machine tool, one end of the top block 5 is installed on the rotary table of the CNC five-axis milling machine, the other end of the top block 5 is on the root of the blade of the regulating stage, and the blade of the regulating stage bl...

specific Embodiment approach 2

[0023] Specific implementation mode two: combination Figure 1-Figure 2 Describe this embodiment, the adjustment level blade positioning fixture described in this embodiment, the jackscrew positioning assembly 4 includes a jackscrew block and a jackscrew, the jackscrew block is fixedly installed on the upper end surface of the clamp body 1, and the jackscrew is threadedly installed on the jackscrew On the block, and the top wire top is at the top of the blade on the back diameter side of the regulating stage blade, and the other structures are the same as in the first embodiment.

specific Embodiment approach 3

[0024] Specific implementation mode three: combination Figure 1-Figure 7 Describe the present embodiment, the processing method of using the regulating stage blade positioning fixture to process the steam channel profile of the regulating stage blade described in this embodiment, the method is realized according to the following steps:

[0025] Step 1: Installation: Install the clamp body 1 on the workbench of the five-axis CNC milling machine. There are two cavities for the three steam channel profiles of the adjusting stage blade before processing, and the processing surface of each cavity has 0.5mm machining surplus. quantity;

[0026] Step 2: Positioning: Place the blade of the regulating stage upside down on the upper end surface of the clamp body 1, the top wire is on the top of the blade on the back diameter side of the blade of the regulating stage, and the first positioning block 2 is positioned on the inner diameter surface of the blade of the regulating stage. At ...

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Abstract

The invention provides a positioning fixture for a regulating stage blade and a method for machining a blade steam passage profile by using the fixture, and relates to blade positioning fixtures and methods for machining blade steam passage profiles. The positioning fixture and the method solve the problems that in the prior art, the after-machining dimension precision of three steam passage profiles of a regulating stage blade is poor, and a polishing process cannot meet drawing precision requirements. The positioning fixture comprises a fixture body, a first positioning block, a second positioning block, a jackscrew positioning assembly and an ejector block, wherein the fixture body is a plate-shaped body and is fixedly mounted on a workbench of a machine tool, the first positioning block and the jackscrew positioning assembly are arranged relatively, the first positioning block and the jackscrew positioning assembly are installed on the upper end face of the fixture body relativelyand fixedly, the second positioning block is installed on a tailstock of the machine tool, and the ejector block is installed on a rotary table of a numerical control five-axis milling machine. The method comprises the first step of installation, the second step of positioning, the third step of rough machining, the fourth step of semi-finishing, the fifth step of finish machining, the sixth stepof B-C cambered surface machining and the seventh step of completing of machining of the steam passage profile of the regulating stage blade. The positioning fixture and the method are used for the field of blade machining.

Description

technical field [0001] The invention relates to a blade positioning fixture and a method for processing a blade steam channel profile, in particular to a blade positioning fixture for an adjustment stage and a method for processing a blade steam channel profile by using the clamp, and belongs to the field of blade processing. Background technique [0002] The regulating stage blade is the first stage blade assembled on the steam turbine rotor. Since each regulating stage blade is composed of three steam channel profiles, it is difficult to process the steam channel due to the small space. In the past, the steam channel was machined by EDM, and then polished by the fitter. After the machining was completed, the machining dimensional accuracy was poor, which could not meet the requirements of the drawing. Contents of the invention [0003] In order to solve the problem of the poor processing dimension accuracy of the three steam channel profiles of the regulating stage blad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23Q3/06B23P15/02
CPCB23P15/02B23Q3/063
Inventor 叶云青岳云淼孙盛丽魏成双刘剑姜秀英赵祎昕兰术维
Owner HARBIN TURBINE
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