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Steam turbine blade processing method based on molded line adjustment

A steam turbine blade and processing method technology, applied in the direction of electrical program control, digital control, etc., can solve the problems of low work efficiency and heavy workload, and achieve the effects of reducing workload, improving processing efficiency, and simple software operation

Active Publication Date: 2016-03-02
HARBIN TURBINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem of large workload and low work efficiency when the programmer manually enters the deviation modification amount in the existing steam turbine blade machining process. A Machining Method of Steam Turbine Blades Based on Profile Adjustment

Method used

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  • Steam turbine blade processing method based on molded line adjustment
  • Steam turbine blade processing method based on molded line adjustment
  • Steam turbine blade processing method based on molded line adjustment

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specific Embodiment approach 1

[0043] The steam turbine blade processing method based on profile adjustment of the present embodiment, the method is realized through the following steps:

[0044] Step 1. Definition:

[0045] (1) The workpiece coordinate system whose contact point between the workpiece and the tool is the center of the circle and which rotates and translates at all times is used as the five-axis linkage program coordinate system; wherein, the five-axis linkage program coordinate system is a function of the rotation angle A; the tool axis direction of the tool is five The Z-axis direction of the axis linkage program coordinate system;

[0046] (2), using the absolute coordinates of four key points determined on the Y-Z plane under the machine tool coordinate system, a circle can be generated according to the five-axis linkage program; wherein,

[0047] The absolute coordinates of the four key points are:

[0048] First point: X0, Y0, Z100, A90

[0049] Second point: X0, Y-100, Z0, A180

...

specific Embodiment approach 2

[0057] The difference from the specific embodiment 1 is that in the steam turbine blade processing method based on profile adjustment in this embodiment, the process of solving the transformation law of the coordinate system of the five-axis linkage program described in step 2, and obtaining the coordinate transformation matrix of the instantaneous coordinate system is as follows:

[0058]Step 21. Set the movement along the X-axis, Y-axis or Z-axis relative to the previous point as a relative value, which has nothing to do with the coordinate system of parallel movement, and set the machine tool coordinate system fixedly connected to the turning center of the machine tool, and the workpiece coordinates are also Fixed on the rotary center of the machine tool;

[0059] (1) In the simple case of four-axis linkage, on the Y-Z plane:

[0060] Assuming that the point converted from position 1' to position 1 in the coordinate system of the five-axis linkage program has a horizontal m...

specific Embodiment approach 3

[0101] Different from the second specific embodiment, in the steam turbine blade processing method based on profile adjustment of the present embodiment, the process of realizing the special operating system of the machine tool with the help of QT and C++ described in step 22 is to copy the opened file to the specified file folder, and then open the ISO file with Notepad, and then the cycle starts when it is found, then find X and assign the number after X to variable X, then find Y and assign the number after Y to variable Y, then find Z and assign Assign the number after Z to variable Z, then search for A and assign the number after A to variable A, then search for C and assign the number after A to variable C; then do the substitution shown in the following formula, if you encounter a return Car, this time the search assignment calculation is over, continue to search for the assignment calculation, if you encounter the end of the cycle, exit the program file and save it; amo...

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Abstract

The invention discloses a steam turbine blade processing method based on molded line adjustment, and belongs to the field of processing control. In a conventional steam turbine blade processing process, blade molded lines with deviations are processed, and the problems of large workload and low work efficiency, caused when a programmer manually inputs a deviation modification amount are eliminated. According to the steam turbine blade processing method based on the molded line adjustment, when a machine tool is actually machined by use of movement along an X axis or a Y axis or a Z axis of a five-axis linkage program coordinate system, parameters moving along the X axis or the Y axis or the Z axis are converted into values under a workpiece coordinate system, and then addition and subtraction operation is carried out with X, Y and Z value vectors in G codes through the parameters after conversion. According to the method provided by the invention, reliance on TS85 software is eliminated in the process of controlling blade molded lines, an operator can an input program file and input modification data, the process of automatically generating a conversion file is realized and the method has the advantages of improving the processing efficiency and decreasing the cost.

Description

technical field [0001] The invention relates to a method for processing steam turbine blades based on profile adjustment. Background technique [0002] In the actual processing of existing steam turbine blades, due to comprehensive factors such as inaccurate manufacturing of fixtures and inaccurate positions of thimble holes, the blades are processed with deviations in the blade profile under completely correct processing procedures. Since the offset of the fixture already exists and is fixed, in the actual machining process, it is necessary to modify the five-axis linkage program to fit the deviation caused by factors such as the blade fixture. For example, the first processed blade will have card angle (Y-axis deviation), inlet and outlet steam side deviation (Z-axis deviation), root crown position deviation, etc. After obtaining the corresponding value by means of measurement, the programmer changes the original processing program accordingly to fit the deviation. The p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/19
CPCG05B19/19
Inventor 闫春明孙桂玲张强尹昕
Owner HARBIN TURBINE
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