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Modularization type material addition and reduction composite repairing method for defective region of component surface

A composite repair and modular technology, applied in the field of mechanical processing, can solve problems such as preprocessing of the area to be repaired, etc., and achieve the effects of improving repair efficiency and repair quality, convenient and fast path planning, and simple shape.

Active Publication Date: 2020-01-03
NANJING INST OF TECH
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Problems solved by technology

However, this method does not involve the description of the pretreatment of the area to be repaired, but only mentions the establishment of a 3D model

Method used

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  • Modularization type material addition and reduction composite repairing method for defective region of component surface
  • Modularization type material addition and reduction composite repairing method for defective region of component surface
  • Modularization type material addition and reduction composite repairing method for defective region of component surface

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Embodiment Construction

[0030] A method for repairing surface defects of parts by modularization, adding and subtracting materials, comprising the following steps:

[0031] (1) Place the part to be repaired on the workbench so that the area I to be repaired faces upward;

[0032] (2) Perform laser three-dimensional scanning of the area I to be repaired and its surroundings to obtain point cloud data of the defect and surrounding areas, and scan coordinate reference points at the same time;

[0033] (3) Calculate and process the point cloud data of the defect part and the surrounding area obtained in step (2) to obtain the characteristic parameters of the defect part;

[0034] (4) Estimate the normal vector of the original surface of the defect area according to the point cloud data of the defect part and the surrounding area obtained in step (2); select a regular envelope geometry module suitable for the defect area according to the characteristic parameters of step (3) , the envelope geometry modul...

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Abstract

The invention provides a modularization type material addition and reduction composite repairing method for a defective region of a component surface and relates to the technical field of machining. The main process of the method comprises the following steps of: implementing three-dimensional scanning on the defective region of the component surface and acquiring point cloud data of a to-be-repaired region; calculating the characteristic parameters of the defective region according to the point cloud data; selecting a corresponding geometric module according to the characteristic parameters;implementing modular milling and removal on the defective region to obtain a regular to-be-repaired region; implementing modular laser melt-coating repairing on the to-be-repaired region; and precisely milling the laser-repaired surface to end the repairing. By adopting a material addition and reduction composite way, the method provided by the invention repairs a complicated irregular defective appearance into a regular geometry; on the basis, the modular to-be-repaired geometry is subjected to laser melt-coating repairing; and the operation route is conveniently and quickly planned, so the overall repairing efficiency is improved. Beside, the precise milling for the laser melt-coating region can maintain the repairing precision of the contour of the repaired surface, and the use performance of the repaired surface is also improved.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to the technical field of a composite repair method for adding and subtracting materials to defect areas on the surface of parts. Background technique [0002] Some overcuts and damages on the surface of precious parts such as aircraft structural parts, engine parts, precision gears and metal molds during the manufacturing process lead to scrapping. Or after these parts have been used for a period of time, the bearing surface or contact area will also be damaged to varying degrees, making the parts unable to continue to be used. Because these parts are generally more expensive, the production process is also more complicated, because some surface damage results in the scrapping of the entire part, often causing great economic losses and waste of resources. [0003] With the advancement of material technology and laser technology, laser sintering-based additive manuf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F7/06B22F3/105B22F3/24B23P6/00B23P15/00B33Y10/00
CPCB22F7/062B22F3/24B23P6/00B23P15/00B33Y10/00B22F2007/068B22F2003/247B22F10/00B22F10/66B22F10/25Y02P10/25
Inventor 卞荣黄家才丁文政史建军黄亚洲侯军明陈勇牟娟
Owner NANJING INST OF TECH
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