Electron beam surface machining method realizing workpiece drag reduction and plate with anti-drag surface

A technology of surface processing and workpiece surface, applied in the field of electron beam surface processing, can solve the problem of inability to process the micro-structure of triangular grooves imitating sharkskin, and achieve the effect of reducing drag and improving the distribution of flow field.

Active Publication Date: 2016-02-17
AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem in the prior art that the microstructure of triangular grooves imitating shark skin cannot be processed on the surface of the workpiece, the present invention provides an electron beam surface processing method for realizing drag reduction of the workpiece and a plate with a drag-reducing surface. The electron beam surface processing method for workpiece drag reduction uses low-power high-quality electron beams to scan at high speed, and through scanning waveform design optimization and worktable movement, the workpiece surface forms bionic micro-morphological features similar to shark skin. The plate with drag-reducing surface improves The distribution of the flow field on the surface of the workpiece is realized, and the effect of drag reduction is realized. It can be used in important fields such as aircraft, submersibles and other aerospace ships.

Method used

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  • Electron beam surface machining method realizing workpiece drag reduction and plate with anti-drag surface
  • Electron beam surface machining method realizing workpiece drag reduction and plate with anti-drag surface
  • Electron beam surface machining method realizing workpiece drag reduction and plate with anti-drag surface

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Embodiment 1

[0026] An electron beam surface processing method for realizing drag reduction of a workpiece, comprising the following steps:

[0027] Step 1, make the electron beam scan the workpiece surface one by one along the first direction A according to the angle (ie figure 1 The track left by the electron beam scanning an angle on the surface of the workpiece is the same as the angle), until the scanning of the row of angles is completed, and the workpiece is moved along the second direction B on the surface of the workpiece while the electron beam is scanning, the first The second direction B is a direction perpendicular to the first direction A on the surface of the workpiece;

[0028] Each of the angles is composed of two sides and three endpoints formed by the intersection of the two sides. Among the three endpoints, the endpoint formed by the intersection of the two sides is the apex, and the other two endpoints are both bottom points. The angle bisectors of the two angles are ...

Embodiment 2

[0053] This embodiment is an alternative to Embodiment 1. The electron beam surface processing method for achieving drag reduction of workpieces described in this embodiment includes the following steps:

[0054] Step 1. Make the electron beam scan the surface of the workpiece along the first direction A according to the angles one by one, until the scanning of the row of angles is completed;

[0055] Each of the angles is composed of two sides and three endpoints formed by the intersection of the two sides. Among the three endpoints, the endpoint formed by the intersection of the two sides is the apex, and the other two endpoints are both bottom points. The angle bisectors of each of the angles are perpendicular to the first direction, and the order of the electron beam scanning each of the angles on the surface of the workpiece is: starting from the apex of the angle and scanning along a side of the angle to reach the side end at the bottom point of the angle, and then scan ...

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Abstract

The invention provides an electron beam surface machining method realizing workpiece drag reduction and a plate with an anti-drag surface. The machining method comprises the following steps: 1, scanning the surface of a workpiece through an electron beam according to a scanning path diagram, and moving the workpiece at a proper speed in a direction perpendicular to the arrangement direction of angle pieces on the surface of the workpiece at the same time; and 2, repeating step 1 until machining is finished, so that a plurality of strip-shaped ribs which are parallel to one another are formed on the surface of the workpiece. According the machining method, low-power high-quality electron beam high-speed scanning is utilized, the surface of the workpiece achieves a sharkskin-like biomimetic micro-texture feature through scanning diagram design optimization and working table moving, and the plate with the anti-drag surface improves the fluid field distribution on the surface of the workpiece, realizes the anti-drag effect, and can be used in the important fields of aviation, aerospace and ships, including aircrafts, submersible vehicles and the like.

Description

technical field [0001] The invention relates to the technical field of electron beam surface processing, in particular to an electron beam surface processing method for realizing drag reduction of a workpiece, and a plate with a drag reduction surface made by the electron beam surface processing method. Background technique [0002] Existing workpieces mainly change the flow field on the surface of the workpiece by means of wall grooves, ribs, and arranging swirl generators to achieve drag reduction effects. However, the traditional shape design and macroscopic structure can no longer meet the development needs, and the surface of the workpiece is processed into The biomimetic microstructure to realize the drag reduction function has greater feasibility and applicability, which is of great significance. [0003] At present, the shark-skin-like triangular groove microstructure on the surface of the workpiece has the function of reducing drag in the flow field, but the traditi...

Claims

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Application Information

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IPC IPC(8): B23K15/08
CPCB23K15/0006B23K15/08
Inventor 王西昌李凯张田朱天辉付鹏飞
Owner AVIC BEIJING AERONAUTICAL MFG TECH RES INST
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