scholarly journals Application of novel force control strategies to enhance robotic abrasive belt grinding quality of aero-engine blades

2019 ◽  
Vol 32 (10) ◽  
pp. 2368-2382 ◽  
Author(s):  
Xiaohu XU ◽  
Dahu ZHU ◽  
Haiyang ZHANG ◽  
Sijie YAN ◽  
Han DING
Keyword(s):  
Force Control ◽  
Control Strategies ◽  
Belt Grinding ◽  
Abrasive Belt ◽  
Aero Engine

Investigation of the effect of abrasive belt constant force grinding based on mechanical decoupling tool system

2020 ◽  
pp. 095440542094937
Author(s):  
Guohong Xie ◽  
Ji Zhao ◽  
Xin Wang ◽  
Huan Liu ◽  
Yan Mu ◽  
...  
Keyword(s):  
Control System ◽  
Force Control ◽  
Normal Force ◽  
Decoupling Control ◽  
Grinding Process ◽  
Constant Force ◽  
Belt Grinding ◽  
Abrasive Belt ◽  
Coupling System ◽  
Mechanical Decoupling

In the abrasive belt grinding process, there are factors affecting the machining stability, efficiency, and quality. Based on the analysis of the grinding process, the normal force in the contact area between the abrasive belt and the workpiece is a major factor. By comparing constant force and non-constant force grinding, the results imply that keeping the grinding force constant will achieve desired material removal and better surface quality. The phenomenon of over- and under-cutting of the workpieces can also be avoided by a constant normal force. In this article, a controllable and flexible belt grinding mechanism accompanied with a mechanical decoupling control strategy is built and tested. Afterward, a detailed comparison is made between the traditional force-position coupling system and the proposed decoupling control system. The proposed control system suppresses the interference between the position and force control systems. The contact force is directly measured and controlled without detecting the position of other components in the tool system. The complexity of the control system is thereby reduced. Finally, several grinding experiments are carried out. The standard deviation and coefficient of variation of the measured normal force are kept within 0.25 and 0.02, respectively. The experiment results reveal that the mechanical decoupling system performs well in force control compared with the traditional force-position coupling system. In addition, the surface roughness Ra < 0.4 μm, the surface quality of the workpiece is improved significantly with the constant force controller.

Research on Path of Contact Wheel for Ruled Blade Grinding

2014 ◽  
Vol 536-537 ◽  
pp. 1343-1346
Author(s):  
Da Qi Li ◽  
Lei Zhang ◽  
Wei Dong Ye ◽  
Hai Ying Zu
Keyword(s):  
Belt Grinding ◽  
High Profile ◽  
Wind Generators ◽  
Aero Engine ◽  
Wrap Angle ◽  
Two Sides ◽  
Profile Accuracy ◽  
Grinding System ◽  
Selection Of

Blade is one of the important components in aero-engine, turbine, and wind generators. The quality of the blades has big influence on the performance of the machine. So high profile accuracy and low surface roughness were put forward. Ruled blade is just one of the blades of aero-engine, which has simple profile and little distort. This blade was grinded by two sides together in the paper. Therefore, in this thesis, the main objects are as fallow: firstly, according to the characteristics of the abrasive belt grinding, analysis the selection of grinding distance for the blade. Secondly, established the model of contact wheel compare grinding system, derived the range of wrap angle of contact wheel, and then two region were make out, one is the region can be directly grinding, and another region which may lead to wheel interference. At last the grinding path of the center of the contact wheel was obtained by calculated the blade model.

Investigations on Belt Grinding of GH4169 Nickel-Based Superalloy

2014 ◽  
Vol 1017 ◽  
pp. 15-20 ◽  
Author(s):  
Gui Jian Xiao ◽  
Yun Huang ◽  
Gui Lin Chen ◽  
Zhi Wu Liu ◽  
Xiu Mei Liu
Keyword(s):  
Material Removal ◽  
Manufacturing Processes ◽  
Belt Grinding ◽  
Abrasive Belt ◽  
Nickel Based Superalloy ◽  
Grinding Ratio ◽  
Aero Engine ◽  
Grinding Conditions ◽  
Engine Components

The majority of aero-engine components are designed and manufactured with nickel-based superalloy GH4169 in mind. There is little information available in the literature related to belt grinding processes of aero-engine components. Up to now, limited research has been reported in the use of belt for grinding aero-engine components made of nickel-based superalloy GH4169. A case study of an abrasive belt grinding performance applied on nickel-based superalloy GH4169 in manufacturing processes is presented, aiming to investigate the possibility of using belt grinding as a operation for components made of nickel-based superalloy GH4169. For the ‘optimised’ grinding conditions, the belt service life is evaluated by changing grinding parameters (grinding speed, contact force and oscillation frequency), and the following output measures are obtained: material removal, belt wear and grinding ratio. As a result, the maximum grinding ratio of G is 8.8, it could be concluded that belt grinding might be considered as a viable process for grinding aero-engine components.

Kinematics Analysis of Abrasive Belt Grinding Robot for Aero-Engine Blade and its Simulation

2014 ◽  
Vol 889-890 ◽  
pp. 1165-1169 ◽  
Author(s):  
Zhi Huang ◽  
Xu Ke ◽  
Shi Hang Cheng ◽  
Fen Qing Heng
Keyword(s):  
Industrial Robots ◽  
Belt Grinding ◽  
Abrasive Belt ◽  
Offline Programming ◽  
Kinematics Simulation ◽  
System Solution ◽  
Aero Engine ◽  
Engine Blade ◽  
Development Technology ◽  
Grinding And Polishing

This paper presents an abrasive belt grinding robotic system solution for traditional aero-engine blade manual grinding situation. In order to overcome the limitation of traditional polishing robot teaching programming way and improve the efficiency of the robot offline programming and simulation of interactive, based on OpenGL robot programming and motion simulation platform with interactive features is constructed with VC++6.0. The result shows that the system is able to realistically simulate the movement of industrial robots grinding and polishing process, and it provides a reference for the other abrasive belt grinding and polishing robot off-programming and kinematics simulation development technology.

Trajectory planning of abrasive belt grinding for aero-engine blade profile

2019 ◽  
Vol 102 (1-4) ◽  
pp. 605-614 ◽  
Author(s):  
Zhi Huang ◽  
Rui Song ◽  
Congbao Wan ◽  
Pengxuan Wei ◽  
Hongyan Wang
Keyword(s):  
Trajectory Planning ◽  
Blade Profile ◽  
Belt Grinding ◽  
Abrasive Belt ◽  
Aero Engine ◽  
Engine Blade

Research on the Technology of Nc Abrasive Belt Grinding for the Leading and Trailing Edges of Aero-Engine Blades

2013 ◽  
Vol 797 ◽  
pp. 67-72 ◽  
Author(s):  
Zhao Yang Liu ◽  
Yun Huang ◽  
He Ping Wei ◽  
Chao Sun
Keyword(s):  
Experimental Result ◽  
Grinding Process ◽  
Belt Grinding ◽  
Existing Problems ◽  
Abrasive Belt ◽  
Grinding Method ◽  
Cnc Grinding ◽  
Trailing Edges ◽  
Aero Engine ◽  
Blade Edge

This paper provides an analysis of the processing status and the existing problems of leading and trailing edges, and proposes a new seven-axis linkage CNC grinding method. Whats more, the paper carries out the forging blade edge abrasive belt grinding experiment. Finally, on the basis of experimental result, grinding process parameters are optimized, and the improved scheme is put forward. Through the experiment, the feasibility of the seven-axis CNC abrasive belt grinding method is verified.

scholarly journals New Orthophoto Generation Strategies from UAV and Ground Remote Sensing Platforms for High-Throughput Phenotyping

2021 ◽  
Vol 13 (5) ◽  
pp. 860
Author(s):  
Yi-Chun Lin ◽  
Tian Zhou ◽  
Taojun Wang ◽  
Melba Crawford ◽  
Ayman Habib
Keyword(s):  
Remote Sensing ◽  
Control Strategies ◽  
Target Function ◽  
Canopy Cover ◽  
Surface Model ◽  
Flowering Date ◽  
Sensing Platforms ◽  
Geolocation Accuracy ◽  
New Strategies

Remote sensing platforms have become an effective data acquisition tool for digital agriculture. Imaging sensors onboard unmanned aerial vehicles (UAVs) and tractors are providing unprecedented high-geometric-resolution data for several crop phenotyping activities (e.g., canopy cover estimation, plant localization, and flowering date identification). Among potential products, orthophotos play an important role in agricultural management. Traditional orthophoto generation strategies suffer from several artifacts (e.g., double mapping, excessive pixilation, and seamline distortions). The above problems are more pronounced when dealing with mid- to late-season imagery, which is often used for establishing flowering date (e.g., tassel and panicle detection for maize and sorghum crops, respectively). In response to these challenges, this paper introduces new strategies for generating orthophotos that are conducive to the straightforward detection of tassels and panicles. The orthophoto generation strategies are valid for both frame and push-broom imaging systems. The target function of these strategies is striking a balance between the improved visual appearance of tassels/panicles and their geolocation accuracy. The new strategies are based on generating a smooth digital surface model (DSM) that maintains the geolocation quality along the plant rows while reducing double mapping and pixilation artifacts. Moreover, seamline control strategies are applied to avoid having seamline distortions at locations where the tassels and panicles are expected. The quality of generated orthophotos is evaluated through visual inspection as well as quantitative assessment of the degree of similarity between the generated orthophotos and original images. Several experimental results from both UAV and ground platforms show that the proposed strategies do improve the visual quality of derived orthophotos while maintaining the geolocation accuracy at tassel/panicle locations.

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