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A no-surplus mechanical finishing process for removing tool marks on the blade body profile

An airfoil profile and finishing technology, which is applied to surface polishing machine tools, machine tools suitable for grinding workpiece edges, manufacturing tools, etc. The problem of uncontrollable quantity, etc., can achieve the effect of avoiding the positional deviation, improving the processing quality, and evenly distributing

Inactive Publication Date: 2016-04-27
SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the manufacture of aero-engine blades, the common method of surface smoothing is manual felt wheel smoothing, and its disadvantage is that the removal amount of the profile cannot be controlled, resulting in local profile out-of-tolerance, leading and trailing edge radii R The problem of sharp edges or square heads cannot pass high-precision detection methods, that is, the detection of three-coordinate measuring machines, which is a technical problem in the field of blade manufacturing

Method used

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  • A no-surplus mechanical finishing process for removing tool marks on the blade body profile
  • A no-surplus mechanical finishing process for removing tool marks on the blade body profile
  • A no-surplus mechanical finishing process for removing tool marks on the blade body profile

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Effect test

Embodiment 1

[0024] This embodiment provides a no-residue mechanical finishing process for removing knife marks on the blade body profile, which is characterized in that: the mechanical finish no-residue process for removing tool marks on the blade body profile, in order to realize the The amount of contour removal is controllable, the radius R of the front and rear edges maintains the roundness state after CNC milling, and the finishing process, equipment, fixtures and processing parameters are optimized to achieve the finishing target;

[0025] Finishing process:

[0026] In order to solve the problem of edge trimming caused by different removal speeds at the radius R of the airfoil profile and the leading and trailing edges during skin finishing, the airfoil profile is divided into rough and fine finishing processes, which are used to remove the profile and the leading and trailing edges respectively. The tool mark at the radius R, and meet the roughness requirements;

[0027] Equipmen...

Embodiment 2

[0034] This embodiment provides a no-residue mechanical finishing process for removing knife marks on the blade body profile, which is characterized in that: the mechanical finish no-residue process for removing tool marks on the blade body profile, in order to realize the The amount of contour removal is controllable, the radius R of the front and rear edges maintains the roundness state after CNC milling, and the finishing process, equipment, fixtures and processing parameters are optimized to achieve the finishing target;

[0035] Finishing process:

[0036] In order to solve the problem of edge trimming caused by different removal speeds at the radius R of the airfoil profile and the leading and trailing edges during skin finishing, the airfoil profile is divided into rough and fine finishing processes, which are used to remove the profile and the leading and trailing edges respectively. The tool mark at the radius R, and meet the roughness requirements;

[0037] Equipmen...

Embodiment 3

[0044] This embodiment provides a no-residue mechanical finishing process for removing knife marks on the blade body profile, which is characterized in that: the mechanical finish no-residue process for removing tool marks on the blade body profile, in order to realize the The amount of contour removal is controllable, the radius R of the front and rear edges maintains the roundness state after CNC milling, and the finishing process, equipment, fixtures and processing parameters are optimized to achieve the finishing target;

[0045] Finishing process:

[0046] In order to solve the problem of edge trimming caused by different removal speeds at the radius R of the airfoil profile and the leading and trailing edges during skin finishing, the airfoil profile is divided into rough and fine finishing processes, which are used to remove the profile and the leading and trailing edges respectively. The tool mark at the radius R, and meet the roughness requirements;

[0047] Equipmen...

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Abstract

Provided is a mechanical finishing non-allowance process for removing tool marks of the molded surface of a blade body. The finishing process, equipment, a clamp and machining parameters are optimized so that a finishing machining target can be achieved. The finishing process comprises the steps that coarse finishing machining and fine finishing machining are respectively conducted on the molded surface of the blade body, so that the tool marks on the molded surface and the radius R position of the front edge and the rear edge are removed respectively, and requirements for roughness are met. The selection of the equipment comprises the step that a spiral-flow type finishing machining device is selected. The design of the clamp comprises the step that the angle between a blade and the grinding material movement is 30 degrees through the clamp. The machining parameters include the rotating speed of a main shaft being 10-120rpm and the rotating speed of a roller being 10-50rpm. The mechanical finishing non-allowance process for removing the tool marks of the molded surface of the blade body has the advantage that machining quality is improved. The profile tolerance of the molded surface meets the requirement for the toughness degree of Ra0.4. The switch-over R of the front edge and the rear edge achieves the aim that the radius R of the front edge and the rear edge of the blade on which finishing machining is conducted keeps the circular degree state after numerical control milling is carried out. Distribution of pressure stress on the surface is more even than that of a manual finishing process.

Description

technical field [0001] The invention relates to the field of blade surface finishing, in particular to a mechanical finishing process without margin for removing tool marks on the blade body surface. Background technique [0002] In the manufacture of aero-engine blades, the common method of surface smoothing is manual felt wheel smoothing, and its disadvantage is that the removal amount of the profile cannot be controlled, resulting in local profile out-of-tolerance, leading and trailing edge radii R The problem of sharp edges or square heads cannot pass the high-precision detection means, that is, the detection of three-coordinate measuring machines, which is a technical problem in the field of blade manufacturing. Contents of the invention [0003] The purpose of the present invention is, in order to ensure that after precision machining of the airfoil profile, the profile profile, the radius R of the leading edge and the trailing edge, and the profile position toleranc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B24B31/02B24B41/06
Inventor 宋成姜绍西王丽李晓明陈立明
Owner SHENYANG LIMING AERO-ENGINE GROUP CORPORATION
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