| CUI Quan-wei,SUN Wen-lei,HUANG Yong.Surface Facula Area Changing Model and Its Effect on Quality of Laser Cladding[J],47(11):225-232 |
| Surface Facula Area Changing Model and Its Effect on Quality of Laser Cladding |
| Received:May 07, 2018 Revised:November 20, 2018 |
| View Full Text View/Add Comment Download reader |
| DOI：10.16490/j.cnki.issn.1001-3660.2018.11.032 |
| KeyWord:laser cladding curved surface facula area laser beam attitude cladding quality mathematical model curvature sphere |
| Author | Institution |
| CUI Quan-wei |
School of Mechanical Engineering, Xinjiang University, Urumqi , China |
| SUN Wen-lei |
School of Mechanical Engineering, Xinjiang University, Urumqi , China |
| HUANG Yong |
School of Mechanical Engineering, Xinjiang University, Urumqi , China |
|
| Hits: |
| Download times: |
| Abstract: |
| The work aims to establish a mathematical model to calculate the change of facula area on curved surface part and study the change range of facula area causing the least effect on the quality of the cladding. The inverse of the Gauss curvature was used as the radius of the curvature sphere and the curvature sphere was used to replace the microelement of the NURBS surface. The cross sectional area was calculated through the mathematical analysis method of the intersection of the cylinder and the sphere so as to derive the mathematical model for the area of the NURBS surface. Through the comparison, the relative error between the result of the mathematical model and the result of CATIA calculation was less than 0.2% and in conformity with the engineering application. Then, three factors (defocusing distance, laser beam attitude and curvature) in the model influencing the size of light spot area were analyzed. Laser beam attitude was the main factor that influences the size of light spot area. On this basis, KF310 alloy powder was deposited on Q235 steel. The beam angle was adjusted for 0 degree, 10 degree, 20 degree, 30 degree and 40 degree angle respectively to test and analyze the microstructure, width and height of the cladding layer. It was concluded that, at 0 degree, 10 degree and 5 degree, the width of the single-channel cladding layer increased with the space angle and facula area; while the cladding height decreased with the increase of facula area. There was a bright white interface between the cladding layer and substrate. This was the plane crystal generated at the interface of the initial solidification. It meant that metallurgical bonding was formed; while, at 30 degree and 40 degree, the width of the single-channel classing layer did not change apparently. There was powder stuck to the surface of the cladding layer edge. The metallurgical quality was poor. The light spot area within 8% increase can ensure the quality of laser cladding deposition layer. The application of this algorithm can meet the requirements of rapid response of laser remanufacturing. |
| Close |
|
|
|