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Machining method of deep and narrow arc grooves for nickel-based superalloy turbine guide vanes

A turbine guide vane, nickel-based high-temperature alloy technology, applied in metal processing equipment, manufacturing tools, bonded grinding wheels, etc., can solve the problem that the surface integrity of the workpiece is difficult to be guaranteed, the surface technical requirements cannot be met, and the surface of the workpiece is deeply ground. Marks and other problems, to achieve the effect of solving the problem of smoothness

Active Publication Date: 2017-11-10
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Nickel-based superalloys have good thermal stability, fatigue resistance and high-temperature strength, so they are widely used in aerospace and shipbuilding industries, but the existence of many strengthening phases and low thermal conductivity make them a typical difficult The grinding difficulties of processing materials are mainly reflected in the difficulty in ensuring the integrity of the workpiece surface and the serious wear of the grinding wheel, which limits the improvement of its processing efficiency.
The use of CBN grinding wheel and optimized grinding process is an important method to achieve high-quality and high-efficiency processing of superalloys. The traditional processing method is to use a certain kind of CBN grinding wheel, which is not only low in efficiency, but also has deep grinding on the surface of the workpiece. Knife marks, can not meet the surface technical requirements of the guide vane

Method used

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  • Machining method of deep and narrow arc grooves for nickel-based superalloy turbine guide vanes
  • Machining method of deep and narrow arc grooves for nickel-based superalloy turbine guide vanes

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Experimental program
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Effect test

Embodiment 1

[0012] Production preparation, lower abrasive formula, simultaneous rough turning of aluminum base with mixed materials, grinding wheel blank forming, rough turning of grinding wheel base, fine turning of grinding wheel base, outer circle dressing of grinding wheel, appearance treatment, final inspection. The material of the primary grinding wheel is proportioned by volume: superfine white corundum 9 with a particle size of 40 μm, and SiO with a particle size of 0.5 μm 2 11. Nano TiO with a particle size of 0.05 μm 2 1, FeS 3; polycrystalline diamond 10, CBN25; the material ratio of the secondary grinding wheel is as follows: the particle size is 20 μm superfine white corundum 8, the particle size is 0.1 μm SiO 2 11-12, the particle size is 0.03μm nano TiO 2 1, FeS1; polycrystalline diamond 1, CBN15;

Embodiment 2

[0014] Production preparation, lower abrasive formula, simultaneous rough turning of aluminum base with mixed materials, grinding wheel blank forming, rough turning of grinding wheel base, fine turning of grinding wheel base, outer circle dressing of grinding wheel, appearance treatment, final inspection. The material of the primary grinding wheel is proportioned by volume: superfine white corundum 8 with a particle size of 30 μm, and SiO with a particle size of 0.3 μm 2 12. Nano TiO with a particle size of 0.03 μm 2 10, FeS 1; polycrystalline diamond 1, CBN20; the material ratio of the secondary grinding wheel is as follows: the particle size is 10 μm superfine white corundum 5, the particle size is 0.2 μm SiO 2 12. Nano TiO with a particle size of 0.05 μm 2 10, FeS3; polycrystalline diamond 10, CBN10;

Embodiment 3

[0016] Production preparation, lower abrasive formula, simultaneous rough turning of aluminum base with mixed materials, grinding wheel blank forming, rough turning of grinding wheel base, fine turning of grinding wheel base, outer circle dressing of grinding wheel, appearance treatment, final inspection.

[0017] The material of the initial grinding wheel is proportioned by volume: the particle size is 35 μm superfine white corundum 8.5, the particle size is 0.4 μm SiO 2 12. Nano TiO with a particle size of 0.04μm 2 6, FeS 2; polycrystalline diamond 6, CBN23; the material ratio of the secondary grinding wheel is: the particle size is 15 μm ultrafine white corundum 6, the particle size is 0.1 μm SiO 2 11. Nano TiO with a particle size of 0.04 μm 2 6, FeS 1-3; polycrystalline diamond 6, CBN12;

[0018] The grinding parameters of the CBN grinding wheel in the above embodiment are: the spindle speed is 50-60 m / s, the feed rate is 50-120 mm / min, and the cutting depth is 2-4 mm. ...

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Abstract

The invention discloses a method for machining a deep narrow arc-shaped groove of a guide blade of a nickel-base superalloy turbine guide vanes. A CBN grinding wheel is adopted for grinding operation and comprises a primary grinding wheel body and a secondary grinding wheel body. A base body of the CBN grinding wheel comprises two grinding sections, the widths of the two grinding sections are different, the narrow grinding section is the primary grinding wheel body, and the wide grinding section is the secondary grinding wheel body. The method has the advantages that a formula and machining technological parameters are combined, the problem that the degree of finish of the surface of the vanes is low can be effectively solved, and the requirements for blade machining and production are met.

Description

technical field [0001] The invention relates to the processing technology of guide blades of aero-engines, in particular to a processing method for deep and narrow arc grooves of guide blades of nickel-based high-temperature alloy turbines and a grinding wheel. Background technique [0002] Nickel-based superalloys have good thermal stability, fatigue resistance and high-temperature strength, so they are widely used in aerospace and shipbuilding industries, but the existence of many strengthening phases and low thermal conductivity make them a typical difficult The grinding difficulties of processing materials are mainly reflected in the difficulty in ensuring the surface integrity of the workpiece and the serious wear of the grinding wheel, which limits the improvement of its processing efficiency. The use of CBN grinding wheel and optimized grinding process is an important method to achieve high-quality and high-efficiency processing of superalloys. The traditional process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24B19/02B24D5/14B24D3/00
CPCB24B19/02B24D3/00B24D5/14
Inventor 梁巧云贾爽刘随建蔺志强李大力
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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