Research on the Adaptive Machining Technology of Blisk

2009 ◽  
Vol 69-70 ◽  
pp. 446-450 ◽  
Author(s):  
Ding Hua Zhang ◽  
Ying Zhang ◽  
Bao Hai Wu
Keyword(s):  
High Precision ◽  
Process Model ◽  
Complex Geometry ◽  
Welding Process ◽  
Nc Machining ◽  
Machining Process ◽  
Design Stage ◽  
Adaptive Process ◽  
Adaptive Machining ◽  
Workpiece Localization

Due to different datum position and inevitable distortion from the linear friction welding process, the nominal CAD model from the design stage is no longer suitable for the use of the final NC machining, and that is the main problem for precisely machining complex blisk. In this paper, an adaptive machining approach based on adaptive process model for high precision manufacturing of blisk is proposed and developed. Comparing the nominal model with the inspection result, adaptive process model is reconstructed to describe workpiece localization, allowance distribution and composite error compensation for NC machining of blisk accurately. Firstly, the transformation matrix for allowance optimization is searched fleetly by genetic algorithm with constraint conditions. Secondly, using the cross-section curve blending and deformation compensation method, adaptive model for shape distortion is constructed to solve the part-to-part variation machining problem and to realize precision machining for complex geometry blisk. Finally, based on the adaptive process model, tool paths used for the last NC machining process can then be adaptively generated to implement the different processes work. Example shows that the adaptive machining technology of blisk is feasible and the result is of high precision and efficiency.

scholarly journals An approach for machining allowance optimization of complex parts with integrated structure

2015 ◽  
Vol 2 (4) ◽  
pp. 248-252 ◽  
Author(s):  
Ying Zhang ◽  
Dinghua Zhang ◽  
Baohai Wu
Keyword(s):  
Nc Machining ◽  
Machining Process ◽  
Solution Strategy ◽  
Adaptive Machining ◽  
Machining Allowance ◽  
Linear Friction ◽  
Alignment Process ◽  
Workpiece Localization ◽  
Complex Parts ◽  
Symmetric Block

Abstract Currently composite manufacturing process, such as linear friction welding plus NC machining, is the main method for the manufacturing and repairing of complex parts with integrated structure. Due to different datum position and inevitable distortion from different processes, it is important to ensure sufficient machining allowance for complex parts during the NC machining process. In this paper, a workpiece localization approach for machining allowance optimization of complex parts based on CMM inspection is developed. This technique concerns an alignment process to ensure sufficient stock allowance for the single parts as well as the whole integrated parts. The mathematical model of the constrained alignment is firstly established, and then the symmetric block solution strategy is proposed to solve the optimization model. Experiment result shows that the approach is appropriate and feasible to distribute the machining allowance for the single and whole parts for adaptive machining of complex parts. Highlights An approach for machining allowance optimization of complex parts based on CMM inspection is developed. An alignment process to ensure sufficient stock allowance for the whole integrated parts is concerned. The symmetric block solution strategy is proposed to solve the constrained alignment model.

scholarly journals 2D Electrochemical Airfoil Machining Process Model

1995 ◽  
Author(s):  
H. A. Nied ◽  
M. S. Lamphere
Keyword(s):  
Process Model ◽  
Complex Geometry ◽  
Shape Change ◽  
Electrochemical Machining ◽  
Aircraft Engine ◽  
Machining Process ◽  
Field Equations ◽  
Workpiece Material ◽  
Faraday’S Law ◽  
Numerical Predictions

A 2D Electro-Chemical Machining (ECM) process model was developed to aid with tooling design and process optimization by simulation of the ECM process. The boundary element method (BEM) was used to numerically solve the field equations of the process model. The electrochemical anodic reaction was furnished by Faraday’s Law, which provided the relationship for the rate of dissolution at the surface of the workpiece as a function of charge transfer. Accordingly, the workpiece shape change and mass of metal removed by the machining process can be determined as a function of time. The process model includes a library of workpiece material and electrolyte combinations for predicting the electrochemical machining behavior, e.g., titanium alloy 6Al-4V and NaCl electrolytes. These metal/electrolyte combinations are of special interest in the aircraft engine industry for manufacturing heat-resistant, rotary components with complex geometry such as airfoil blades. The major features of the numerical computer program are briefly described with a selected example of machining a typical fan blade. Preliminary comparison of the numerical predictions with the nominal airfoil geometry showed good agreement and is discussed below.

Fit Degree Calculation of an Aircraft Part Manufacturing Process

2014 ◽  
Vol 989-994 ◽  
pp. 3153-3156
Author(s):  
Xiong Fei Huang ◽  
Fang Zhu ◽  
Na Wei
Keyword(s):  
High Precision ◽  
Manufacturing Process ◽  
Process Model ◽  
Machining Process ◽  
Precision Machining ◽  
Aircraft Manufacturing ◽  
Parts Manufacturing ◽  
Very High ◽  
High Coordination ◽  
Coordination Degree

Aircraft manufacturing process normally requires very high precision assembly parts which are achieved in practice by a high-precision machining parts followed by a high coordination degree assembly process. The current practice in aircraft parts manufacturing process is that the manufacturing cycle is long, the rework rate is high and the manufacturing precision is difficult to improve. This can be sometimes infeasible or very costly. In this paper, we consider a fit degree calculation method to achieve precision aircraft parts with economical manufacturing processes. We consider an analytical approach to establish a physical process model to guide the design and machining process of assembly parts, which can assume the fit degree. The results show that the approach can obtain the nearly optimal process parameters at designated fit degree. At last, a case is developed to verify the proposed methods.

Electrical Discharge Grinding (EDG) of Polycrystalline Diamond - Effect of Machining Polarity

2014 ◽  
Vol 1025-1026 ◽  
pp. 628-632 ◽  
Author(s):  
Mohammad Zulafif Rahim ◽  
Song Lin Ding ◽  
John Mo
Keyword(s):  
Electrical Discharge ◽  
Complex Geometry ◽  
Polycrystalline Diamond ◽  
Machining Process ◽  
Morphological Examination ◽  
Carbon Structure ◽  
Finishing Process ◽  
Advanced Machining ◽  
The Difference ◽  
Pcd Tools

Electrical discharge grinding (EDG) is an advanced machining process and can be utilised to fabricate complex geometry of PCD tools. However, the PCD removal mechanism in this process is complicated. This study was carried out to understand the difference in PCD surface structure with difference EDG polarities. The study revealed that the finishing process with negative polarity is the reason for the porous structure on the surface. Further analysis on the chemical element and carbon structure were implemented as the morphological examination of the surface.

Geometrical Modeling Method of Process Driven by Typical Process Model

2013 ◽  
Vol 770 ◽  
pp. 361-365
Author(s):  
Yu Peng Xin ◽  
Xi Tian Tian ◽  
Li Jiang Huang ◽  
Jun Hao Geng
Keyword(s):  
Process Model ◽  
Modeling Method ◽  
Process Models ◽  
Machining Process ◽  
Process Ontology ◽  
Geometrical Modeling ◽  
Mapping Rules ◽  
Model Mapping ◽  
Generate Process ◽  
Typical Process

In order to improve the efficiency of NC machining programming, and realize the rapid establishment of blank model or middle blank model, a geometrical modeling method of process driven by typical process model was put forward. This method is based on the typical process for the establishment of typical process model, to establish a mapping between modeling operation and machining process ontology, and format model mapping rules. In the process geometrical modeling of the high similarity parts, by calling the typical process model mapping rules, can generate process models automatically. A enterprise disc type parts typical process as an example is used to verify the proposed method.

Research on Key Technology of Data Mining for Volleyball Game Based on Service System

2014 ◽  
Vol 543-547 ◽  
pp. 4698-4701
Author(s):  
Juan Wang
Keyword(s):  
Data Mining ◽  
High Precision ◽  
Service System ◽  
Processing System ◽  
Machining Process ◽  
Precision Machining ◽  
Intelligent Processing ◽  
Mining Model ◽  
Processing Cycle ◽  
Key Parameter

During the processing of aircraft and other high precision machinery workpieces, if using the traditional machining methods, it will consume a amount of machining costs, and the mechanical processing cycle is long. In this context, this paper designs a kind of robot intelligent processing system with high precision machinery. And it has realized the intelligent online control on the machining process by using the high precision machining intelligent online monitoring technology and the numerical simulation prediction technology. Finally, this system is introduced into the process of data mining for volleyball game, and designs the partial differential variational data mining model, which has realized the key parameter data mining of volleyball games service system, and has provided reliable parameters and technical support for the training of volleyball players.

An Approach to Generate Three Dimensional Machining Process Model According to Information from Design Model Based on Definition

2016 ◽  
Vol 693 ◽  
pp. 1684-1692 ◽  
Author(s):  
Hong Lei Zhang ◽  
Wen He Liao ◽  
Yu Guo ◽  
Wen An Yang
Keyword(s):  
Process Model ◽  
Three Dimensional ◽  
Design Model ◽  
Machining Process ◽  
Model Generation ◽  
Geometric Models ◽  
Model Based

Faced with the problem of generation for 3D machining process model, an approach to generate three dimensional machining process model according to information from design model based on definition is proposed. Compared with the existing methods, the approach utilizes multiple information of design model based on definition and takes many phases into consideration of 3D process model generation. The structure of 3D machining process model is defined and the course of 3D process model generation is researched, including multiple information acquirement, generation of procedure geometric models and annotation. Finally, the framework of system and application for 3D machining process model generation are presented for validation purposes.

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