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A composite repair method of modularized addition and subtraction materials in the defect area of ​​the part surface

A compound repair and modular technology, applied in the field of mechanical processing, can solve the problems that do not involve the pretreatment of the area to be repaired, achieve the effect of convenient and fast path planning, improve repair efficiency, and improve performance

Active Publication Date: 2021-08-24
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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  • A composite repair method of modularized addition and subtraction materials in the defect area of ​​the part surface
  • A composite repair method of modularized addition and subtraction materials in the defect area of ​​the part surface
  • A composite repair method of modularized addition and subtraction materials in the defect area of ​​the part 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 relates to a composite repair method of modularized addition and subtraction materials for part surface defects, which relates to the technical field of mechanical processing. The main process includes three-dimensional scanning of the defect area on the surface of the part to obtain the point cloud data of the area to be repaired; calculating the characteristic parameters of the defect area according to the point cloud data; selecting the corresponding geometric module according to the characteristic parameters; and removing the defect area by modular milling Processing to obtain the regular area to be repaired; perform modular laser cladding repair on the area to be repaired; perform precision milling on the laser repaired surface to complete the repair. The present invention trims the complex and irregular defect shape into a regular geometric body by adding and subtracting materials, and on this basis, performs laser cladding repair on the modular geometric body to be repaired, and the path planning is convenient and fast, thereby improving the repair efficiency as a whole. In addition, the precision milling of the laser cladding area can maintain the repair accuracy of the shape and contour of the repaired surface, and at the same time improve the service performance of the repaired surface.

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 manufac...

Claims

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Application Information

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Patent Type & Authority Patents(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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