Aeroplane engine blade edge reconstruction based on non-uniform B-Spine wavelet algorithm

2011 ◽  
Author(s):  
Hao Wang ◽  
Liwen Wang ◽  
Tao Wang ◽  
Wei Zhao ◽  
Tingjian Dong
Keyword(s):  
Edge Reconstruction ◽  
Engine Blade ◽  
Blade Edge ◽  
Wavelet Algorithm

Constructing Process Models of Engine Blade Surfaces for Their Adaptive Machining: An Optimal Approach

2018 ◽  
Vol 141 (1) ◽  
Author(s):  
Neng Wan ◽  
Peng Liu ◽  
Zezhong C. Chen ◽  
Zhiyong Chang
Keyword(s):  
Manufacturing Process ◽  
Process Models ◽  
Tool Paths ◽  
Design Tolerance ◽  
Adaptive Machining ◽  
Trailing Edges ◽  
Engine Blade ◽  
Blade Machining ◽  
Blade Edge ◽  
Optimal Approach

In a new blade manufacturing process, manufacturers precisely forge blade billets with the blade suction and the pressure surfaces within tolerance. After that, only two blade edge billets should be machined to the leading- and the trailing-edges within tolerance. If these edge design surfaces are used to generate tool paths for machining the edge billets, the machined edges are not continuous with the suction and the pressure surfaces. To address this problem, an optimal approach to constructing process models of edge surfaces is proposed for adaptive blade machining. Specifically, the modified edge surfaces are optimized within the design tolerance and are continuous with the billet suction and pressure surfaces. These surfaces are used to generate tool paths for machining the edge billets. This approach addresses the current technical challenge in the new blade manufacturing process and can substantially promote this process in blade mass production.

A method for evaluating the edge strength of soil-cutting parts of forestry machines

2020 ◽  
Vol 67 (1) ◽  
pp. 111-115
Author(s):  
Sergey A. Voynash ◽  
Viktoriya A. Sokolova ◽  
Viktor I. Kretinin ◽  
Viktor A. Markov ◽  
Elena A. Alekseeva Alekseeva ◽  
...  
Keyword(s):  
Fatigue Failure ◽  
Research Purpose ◽  
Solid Inclusion ◽  
Hard Alloys ◽  
Blade Edge ◽  
Solid Soil ◽  
Soil Cutting ◽  
Cyclic Impact ◽  
Working Bodies ◽  
Reinforcing Layer

One of the main factors that determine the resistance of blade working bodies against damage under dynamic loads is their resistance to plastic crumpling, brittle or fatigue failure. Hard alloys that strengthen the blades of tillage parts are more brittle materials than steel, so the blunting of their edges is caused by the formation of cracks, their gradual growth or microchipping, even from a possible single impact of a solid inclusion in the soil. In addition to the usual brittle fracture of hard alloys, fatigue failure occurs under cyclic impact conditions. (Research purpose) The research purpose is in identifying the pattern of destruction of the blade edge of soil-cutting parts of forestry machines and theoretically justifying the algorithm for assessing the strength to determine the rational thickness of the wear-resistant coating during hardening. (Materials and methods) The article presents the main regularities of the influence of material properties and geometric parameters of the blade on the radius of rounding. (Results and discussion) The process of breaking the edge of the blade of hardened working bodies of forestry machines has been studied. The claim that the blunting of the blades is mainly due to its destruction and not to wear has been proved. The article presents a method for evaluating the strength of bimetallic blades of soil-cutting parts of forestry machines. It was found that the blunting of the blade occurs as a result of edge destruction in the process of multiple impacts of solid soil inclusions along the edge of the blade. (Conclusions) The article shows that the destruction of the edge of the blade leads to blunting of soil-cutting parts, which affects their performance. It was found that the sharpness of a self-sharpening hardened blade is determined by the thickness of the reinforcing layer and its ability to resist destruction under impact.

Fast wavelet algorithm of the Poisson integral

1998 ◽  
Vol 96 (2-3) ◽  
pp. 127-144 ◽  
Author(s):  
Tonglin Zhu ◽  
Wei Lin
Keyword(s):  
Poisson Integral ◽  
Fast Wavelet ◽  
Wavelet Algorithm

Fabrication and EDM Corrosion Resistance of Copper Electroforming Layer on Tube Electrode for Aero-Engine Blade Cooling Hole in EDM Process

2018 ◽  
Vol 764 ◽  
pp. 133-141 ◽  
Author(s):  
Zhi Yong Li ◽  
Qing Wei Cui ◽  
Bin Chen ◽  
Ji Xu ◽  
Hun Guo
Keyword(s):  
Corrosion Resistance ◽  
Loss Rate ◽  
Pure Copper ◽  
Blade Cooling ◽  
Tube Electrode ◽  
Aero Engine ◽  
Engine Blade ◽  
Cooling Hole ◽  
Edm Process ◽  
Main Material

The process parameters of fundamental electroforming solution were optimized firstly. Furthermore, some pure copper electroforming samples were prepared in the condition of different nana La2O3 addition quantity. Three main material properties evaluated. In addition, the EDM machining experiments were conducted to verify the characteristics of electrical corrosion resistance resulting from the prepared copper tube electroforming samples for cooling hole of Inconel718 nickel alloy. EDM experimental results demonstrate that copper electroforming layer with grain size 15.9μm, microhardness 98.2HV, with 1.2g/L addition quantity of nana La2O3, and its electrode loss rate decrease 13.29% and 7.26% than pure copper and copper electroforming layer without nana La2O3 addition respectively.

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