Method for eliminating broaching elastic deformation of high-temperature alloy turbine disk

A high-temperature alloy, elastic deformation technology, applied in the field of machining, can solve the problems of affecting product quality, increasing the elastic deformation of the turbine disc wheel groove, poor overall rigidity, etc., to achieve the effect of improving product quality, eliminating elastic deformation and eliminating influence

Active Publication Date: 2013-06-19
HARBIN TURBINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for eliminating elastic deformation of superalloy turbine disk broaching, to solve the broaching wheel groove of superalloy turbine disk on a vertical numerical control broaching machine. When the finishing broach starts to work, the broached part is cantilevered state, the overall rigidity is poor, which increases the elastic deformation of the wheel groove of the turbine disc, and the wheel groove formed by broaching is smaller than the actual design wheel groove, which affects the quality of the product

Method used

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  • Method for eliminating broaching elastic deformation of high-temperature alloy turbine disk
  • Method for eliminating broaching elastic deformation of high-temperature alloy turbine disk
  • Method for eliminating broaching elastic deformation of high-temperature alloy turbine disk

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specific Embodiment approach 1

[0034] Specific implementation mode one: combine Figure 4 Explain, the superalloy turbine disc broaching elastic deformation elimination method of the present embodiment, said method is realized in this way:

[0035] Step 1: Segmented fine broaching: first divide the profile of the wheel groove of the superalloy turbine disc to be broached into several broaching segments, and then perform fine broaching on each broaching segment (reduce the The tooth cutting edge is wide, which reduces the broaching force and reduces the springback by 50%. The principle of division can be determined according to the elastic deformation of the finishing broach after broaching. The segmented finishing broaching has changed the previous method of full-tooth broaching , divide the profile line into several broaching parts for broaching, reducing the cutting length);

[0036] Step 2: The broaching tool teeth use two teeth as a group to complete a tooth lift for anti-springback broaching; after st...

specific Embodiment approach 2

[0039] Specific implementation mode two: combination Figure 1-Figure 3 Description, in step one of the present embodiment, the profile line of the wheel groove of the superalloy turbine disk to be broached is divided into three broaching sections, and the three broaching sections are respectively the first broaching section 1, the second broaching section Cutting section 2 and the third broaching section 3, the profile line near the bottom of the wheel groove of the superalloy turbine disk is set as the first broaching section 1, and the profile line at the middle section of the wheel groove of the superalloy turbine disk is set Set as the second broaching segment 2, the profile line near the top of the wheel groove of the superalloy turbine disc is set as the third broaching segment 3; When cutting the teeth, the tooth entity widths of the second broaching section 2 and the third broaching section 3 are 0.1mm smaller than the maximum entity width of the finishing broach; Wh...

specific Embodiment approach 3

[0040] Specific embodiment three: In step two of this embodiment, the broaching force of the anti-rebound broach is:

[0041] F=CF·af X ·Σaw·Ze·K1·K2·K3·K4,

[0042] In the formula, F—the broaching force of the anti-rebound broach, Kg;

[0043] af—tooth lift, mm;

[0044] Σaw—cutting edge width of each tooth of anti-springback broaches, mm;

[0045] Ze—the number of working teeth of the anti-springback broach, Ze=L / t+1, where L is the broaching length, mm; t is the tooth pitch;

[0046] CF—working material coefficient;

[0047] x—index;

[0048] K1, K2, K3, K4—respectively represent the correction coefficients of the wear degree of the broach, cutting fluid, rake angle and back angle of the broach. Other method steps are the same as those in the first or second embodiment.

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Abstract

The invention discloses a method for eliminating broaching elastic deformation of a high-temperature alloy turbine disk, relating to a method for eliminating broaching elastic deformation of a turbine disk. The invention aims to solve the problems that the broached part is in a cantilever state during finishing broaching, the entire rigidity is relatively low, the elastic deformation of the turbine disk race is increased and the product quality is influenced when the high-temperature alloy turbine disk broaches a race on a vertical numerical control broaching machine. A method I comprises thefollowing steps of: segmented finishing broaching: firstly, dividing the moulding line of the race of the high-temperature alloy turbine disk to be broached into multiple broaching segments, then performing finishing broaching of each broaching segment, implementing rise per tooth by taking every two of the broach teeth as a group to perform anti-rebound broaching, and performing corrective cutting by use of full-tooth form cutter teeth. A method II is different from the method I in that: the segmented finishing broaching is replaced by the broaching of a finishing broach, wherein the pitch of the finishing broach is equal to the thickness of the high-temperature alloy turbine disk to be broached or is 0.9-1 time of the thickness of the high-temperature alloy turbine disk to be broached. The method disclosed by the invention is used for eliminating the elastic deformation produced by the broaching of the high-temperature alloy turbine disk.

Description

technical field [0001] The invention relates to a method for eliminating elastic deformation of a broaching turbine disk, which belongs to the field of mechanical processing. Background technique [0002] Superalloys have excellent high temperature strength, thermal stability and thermal fatigue resistance. The cutting force is large during cutting, which is 2 to 4 times that of ordinary steel, and the plastic deformation is large, and the elongation at room temperature can reach 30% to 50%. [0003] The high-temperature alloy turbine disc broaches the wheel groove on a vertical CNC broaching machine. According to the processing program, each group of broaches is broached for one week and then another group of broaches is broached. When the finishing broach starts to work, the broached part is in a cantilever state (As shown in the figure below), the overall rigidity is poor, which increases the elastic deformation of the wheel groove of the turbine disc. The wheel groove f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23D37/22B23D43/00
Inventor 姚青文訾凯松孙盛丽王莉莉储继影宋兵吕先哲
Owner HARBIN TURBINE
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