Optimization of Axis Tilt Machining with Five-Axis Ball-End Cutter

2011 ◽  
Vol 305 ◽  
pp. 357-362
Author(s):  
Ke Hua Zhang ◽  
Li Min ◽  
Dong Hui Wen
Keyword(s):  
High Efficiency ◽  
Optimization Methods ◽  
Processing Method ◽  
Process Efficiency ◽  
Processing Quality ◽  
Tool Axis ◽  
Traditional Processing ◽  
Five Axis

A half of covering angle processing method is proposed for optimizing process efficiency and quality with ball-end tool axis tilt. Firstly, according to the features of ball-end tool structural, this paper introduced traditional no-tilt processing problems, such as tool fast wear and poor processing quality, and then verified the effect of tool tilt processing by analyzing and comparing cutting quality with the differences of the no-tilt processing and tilt processing. Finally, it introduced two optimization methods about tool tilt processing, and also made a comparison with its feature. The results show that traditional processing brings about more extrusion and scratches, while little and high efficiency with method of tool tilt processing. Conclusion: it not only brings higher processing quality and efficiency, but also can make the ball-end cutter be longevity of service.

Research on Five-Axis Dual-NURBS Adaptive Interpolation Algorithm for Flank Milling

2010 ◽  
Vol 443 ◽  
pp. 330-335 ◽  
Author(s):  
Yu Han Wang ◽  
Jing Chun Feng ◽  
Sun Chao ◽  
Ming Chen
Keyword(s):  
Tool Path ◽  
Flank Milling ◽  
Interpolation Algorithm ◽  
Machining Time ◽  
Surface Machining ◽  
Tool Axis ◽  
Scanning Area ◽  
Nurbs Interpolation ◽  
Milling Method ◽  
Five Axis

In order to exploit the advantages of five-axis flank milling method for space free surface machining to the full, a definition of non-equidistant dual-NURBS tool path is presented first. On this basis, the constraint of velocity of points on the tool axis and the constraint of scanning area of the tool axis are deduced. Considering both of these constraints, an adaptive feed five-axis dual-NURBS interpolation algorithm is proposed. The simulation results show that the feedrate with the proposed algorithm satisfies both of the constraints and the machining time is reduced by 38.3% in comparison with the constant feed interpolator algorithm.

Study on Grinding Technology of Electrical Discharge Grinding of Curve Edge Polycrystalline Diamond

2006 ◽  
Vol 304-305 ◽  
pp. 206-209 ◽  
Author(s):  
Gang Liu ◽  
Ming Chen ◽  
Z.G. Hu ◽  
X.F. Zhu ◽  
H. Xu ◽  
...  
Keyword(s):  
Surface Quality ◽  
Electrical Discharge ◽  
High Efficiency ◽  
Practical Significance ◽  
Cnc System ◽  
Milling Cutter ◽  
Curve Edge ◽  
Grinding Machine ◽  
Five Axis ◽  
Pcd Tools

PCD tools, especially curve edge PCD compound tools are used widely in machining nonferrous and non-metal materials with high efficiency and precision because of their excellent cutting properties. But high quality grinding of PCD tools is the uppermost obstacle in application because there are great difficulties to profile and sharpen edge in grinding, especially for milling cutter and drill with curve edge. This paper studied technology of wire EDG curve edge PCD compound tools by wire electrical discharge grinding machine with five-axis CNC system. The grinding quality was evaluated by scanning electron microscope (SEM) and roughometer. Three steps processing technique (roughing, finishing and fine finishing) and optimal process parameters of wire EDG PCD tools were recommended after considering synthetically the surface quality, precision and machining efficiency. The results met the requirement of high surface quality, precision and efficiency. This paper also applied successfully the optimal technology to grind a PCD milling cutter with outer and inner blade by electrical discharge grinding machine with five-axis CNC system. By the optimal parameters, the process yielded high precision of ±4.3µm and low roughness of 0.30µm. Experiment results have great practical significance to the high precise and efficient wire EDG of PCD tools.

scholarly journals Traditional Processing Method of Smoked Corbicula fluminea (Etak): Case of Etak Vendor in Kelantan, Malaysia

2020 ◽  
Vol 596 ◽  
pp. 012057
Author(s):  
Aweng Eh Rak ◽  
Ahamad Tarmizi Azizan ◽  
Mohd Rafi Yaacob ◽  
Zulhazman Hamzah ◽  
Sharifah Aisyah Syed Omar ◽  
...  
Keyword(s):  
Corbicula Fluminea ◽  
Processing Method ◽  
Traditional Processing

scholarly journals Recent Design Optimization Methods for Energy-Efficient Electric Motors and Derived Requirements for a New Improved Method—Part 1

Proceedings ◽  
2018 ◽  
Vol 2 (22) ◽  
pp. 1400
Author(s):  
Johannes Schmelcher ◽  
Max Kleine Büning ◽  
Kai Kreisköther ◽  
Dieter Gerling ◽  
Achim Kampker
Keyword(s):  
Rare Earth ◽  
Design Optimization ◽  
Energy Efficient ◽  
Degrees Of Freedom ◽  
High Efficiency ◽  
Optimization Problems ◽  
Computing Time ◽  
Optimization Methods ◽  
Electric Motors ◽  
Electric Cars

Energy-efficient electric motors are gathering an increased attention since they are used in electric cars or to reduce operational costs, for instance. Due to their high efficiency, permanent-magnet synchronous motors are used progressively more. However, the need to use rare-earth magnets for such high-efficiency motors is problematic not only in regard to the cost but also in socio-political and environmental aspects. Therefore, an increasing effort has to be put in finding the best design possible. The goals to achieve are, among others, to reduce the amount of rare-earth magnet material but also to increase the efficiency. In the first part of this multipart paper, characteristics of optimization problems in engineering and general methods to solve them are presented. In part two, different approaches to the design optimization problem of electric motors are highlighted. The last part will evaluate the different categories of optimization methods with respect to the criteria: degrees of freedom, computing time and the required user experience. As will be seen, there is a conflict of objectives regarding the criteria mentioned above. Requirements, which a new optimization method has to fulfil in order to solve the conflict of objectives will be presented in this last paper.

An Efficient Volumetric-Error Measurement Method for Five-Axis Machine Tools

2005 ◽  
Author(s):  
Shih-Ming Wang ◽  
Han-Jen Yu ◽  
Hung-Wei Liao
Keyword(s):  
Machine Tools ◽  
Measurement Method ◽  
Degrees Of Freedom ◽  
High Efficiency ◽  
Low Cost ◽  
Volumetric Errors ◽  
Different Types ◽  
Measurement Methodology ◽  
Simple Measurement ◽  
Five Axis

Accurate measurement of volumetric errors plays an important role for error compensation for multi-axis machines. The error measurements for volumetric errors of five-axis machines are usually very complex and costly than that for three-axis machines. In this study, a direct and simple measurement method using telescoping ball-bar system for volumetric errors for different types of five-axis machines was developed. The method using two-step measurement methodology and incorporating with derived error models, can quickly determine the five degrees-of-freedom (DOF) volumetric errors of five-axis machine tools. Comparing to most of the current used measurement methods, the proposed method provides the advantages of low cost, high efficiency, easy setup, and high accuracy.

scholarly journals Basketball Action Data Processing Method Based on Mode Symmetric Algorithm

Symmetry ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 560 ◽  
Author(s):  
Fei Zhang ◽  
Yi Jiang
Keyword(s):  
Data Processing ◽  
High Efficiency ◽  
Least Squares Method ◽  
Detection Algorithm ◽  
Processing Method ◽  
Target Image ◽  
Modal Data ◽  
Motion Data ◽  
Mode Decomposition ◽  
Data Processing Method

In the course of basketball training, a large number of basketball action data are generated according to the athletes’ body movements. Due to the low precision of the basketball action data processed by the traditional method in basketball technical training, basketball action processing is not in place. The basketball motion data processing method, based on the mode symmetric algorithm was studied. The basketball motion detection algorithm based on symmetric difference and background reduction was used to remove the background influence of basketball movement and obtain the binary basketball action target image containing the data. On this basis, the pole symmetric mode decomposition (ESMD) method was used to modally decompose the binary basketball action target image containing the data, and the least squares method was used to optimize the elliptic (AGM) curve to realize the screening of basketball action modal data. Through the cleaning and integration of basketball action modal data, integration and data reduction basketball action modal data, the data was processed efficiently. The experimental results showed that the proposed method was a high precision and high efficiency basketball action data processing method.

Effect of charge and deformation parameter on energy extraction in charged non-Kerr black holes

2019 ◽  
Vol 28 (16) ◽  
pp. 2040012
Author(s):  
Rehana Rahim ◽  
Khalid Saifullah
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Deformation Parameter ◽  
High Efficiency ◽  
Process Efficiency ◽  
Energy Extraction ◽  
Penrose Process ◽  
Kerr Black Holes ◽  
Very High

We analyze the charged Johannsen–Psaltis black hole for energy extraction via the Penrose process. Efficiency of the Penrose process is found to be dependent on the deformation parameter of the metric and charge. Doing the calculations numerically, we find that, in the nonextremal limit, presence of charge leads to lesser efficiency than the Kerr. In the extremal cases with negative deformation parameter, charge leads to a very high efficiency, higher than that of the Kerr and Johannsen–Psaltis black holes.

scholarly journals Genetic Approach for Multiobjective Optimization of Epicyclical Gear Train

2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Kaoutar Daoudi ◽  
El Mosthapha Boudi ◽  
Mohsine Abdellah
Keyword(s):  
Multiobjective Optimization ◽  
High Efficiency ◽  
Bending Strength ◽  
Power Transmission ◽  
Planetary Gear ◽  
Operating Mode ◽  
Optimization Methods ◽  
Gear Train ◽  
Tooth Width ◽  
Power Transmission Systems

The determination of optimal design of the planetary gear train with a lightweight, a short center distance, and a high efficiency is an important issue in the preliminary design of power transmission systems. Conventional and traditional methods have been widely used in optimization. They are deterministic and limited to solve some mechanical problems with several variables and constraints. Therefore, some optimization methods have been developed, such as the nonconventional method, the genetic algorithm (GA). This paper describes a multiobjective optimization for the epicyclical gear train system using the GA. It is aimed to obtain the optimal dimensions for epicyclical gear components like a module, number of teeth, the tooth width, the shaft diameter of the gears, and a performed efficiency under the variation of operating mode of PGT system. The problem is formulated under the satisfaction of assembly and balance constraints, bending strength, contact strength of teeth, and other dimension conditions. The mathematical model and all steps of the GA are presented in detail.

scholarly journals Hydrolytic secretome engineering in Yarrowia lipolytica for consolidated bioprocessing on polysaccharide resources: review on starch, cellulose, xylan, and inulin

2021 ◽  
Vol 105 (3) ◽  
pp. 975-989
Author(s):  
Ewelina Celińska ◽  
Jean-Marc Nicaud ◽  
Wojciech Białas
Keyword(s):  
Yarrowia Lipolytica ◽  
High Efficiency ◽  
Consolidated Bioprocessing ◽  
Genome Mining ◽  
Value Added ◽  
Process Models ◽  
Process Efficiency ◽  
Secretory Proteins ◽  
Microbial Conversion ◽  
Key Points

Abstract Consolidated bioprocessing (CBP) featuring concomitant hydrolysis of renewable substrates and microbial conversion into value-added biomolecules is considered to bring substantial benefits to the overall process efficiency. The biggest challenge in developing an economically feasible CBP process is identification of bifunctional biocatalyst merging the ability to utilize the substrate and convert it to value-added product with high efficiency. Yarrowia lipolytica is known for its exceptional performance in hydrophobic substrates assimilation and storage. On the other hand, its capacity to grow on plant-derived biomass is strongly limited. Still, its high potential to simultaneously overproduce several secretory proteins makes Y. lipolytica a platform of choice for expanding its substrate range to complex polysaccharides by engineering its hydrolytic secretome. This review provides an overview of different genetic engineering strategies advancing development of Y. lipolytica strains able to grow on the following four complex polysaccharides: starch, cellulose, xylan, and inulin. Much attention has been paid to genome mining studies uncovering native potential of this species to assimilate untypical sugars, as in many cases it turns out that dormant pathways are present in Y. lipolytica’s genome. In addition, the magnitude of the economic gain by CBP processing is here discussed and supported with adequate calculations based on simulated process models. Key points • The mini-review updates the knowledge on polysaccharide-utilizing Yarrowia lipolytica. • Insight into molecular bases founding new biochemical qualities is provided. • Model industrial processes were simulated and the associated costs were calculated.

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