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基于油包水工作液的绿色高效电火花成形加工

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61.5 6.3折 98 全新

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作者刘永红等著

出版社科学出版社

ISBN9787030492449

出版时间2016-10

装帧平装

开本其他

定价98元

货号1201377727

上书时间2024-06-14

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品相描述：全新

商品描述: 目录
Foreword
Preface
Chapter 1 Dehydration efficiency of high—frequency pulsed DC electrical fields on water—in—oil emulsion
1.1 Introduction
1.2 Model development
1.2.1 Define of emulsion stability index
1.2.2 Define of dehydration efficiency index
1.3 Experiments
1.3.1 Preparation of emulsion
1.3.2 Experimental instrumentation
1.3.3 Relationship between conductivity and measured current
1.4 Results and discussion
1.4.1 The relationship between measured current and droplets behaviour
1.4.2 Influence of the inter—electrode distance
1.4.3 Influence of the frequency
1.4.4 Influence of the pulse duration
1.4.5 Influence of the water contents
1.4.6 Influence of surfactant concentration
1.4.7 Influence of initial droplets size
1.4.8 Influence of sodium chloride concentration in the dispersed phase
1.4.9 Influence of temperature
1.5 Conclusions
Chapter 2 Simulation of droplet behavior in water—in—oil emulsion subjected to an electric field
2.1 Introduction
2.2 Kinetic modeling of droplets
2.2.1 Forces acting on droplets
2.2.2 Electric forces
2.2.3 Viscous forces
2.2.4 Coulomb force and gravity
2.3 Simulation
2.3.1 Assumptions
2.3.2 Coalescence probability
2.3.3 Simulation strategy
2.4 Experiments
2.5 Results and discussion
2.6 Conclusions
Chapter 3 Application of variable frequency technique on electrical dehydration of water—in—oil emulsion
3.1 Introduction
3.2 Experiments
3.2.1 Preparation of emulsion
3.2.2 Experimental instrumentation
3.2.3 Define of dehydration efficiency index
3.3 Results and discussion
3.3.1 The relationship between measured current and droplets behaviour
3.3.2 Dehydration efficiency of the pulsed electric field with constant frequency
3.3.3 Dehydration efficiency of the pulsed electric field with changing frequency
3.4 Conclusions
Chapter 4 Discussion of the drop rest phenomenon at millimeter scale and coalescence of droplets at micrometer scale
4.1 Introduction
4.2 Theory
4.2.1 Stochastic model for the drop—interface and droplet—droplet coalescence
4.2.2 Model for the droplets behavior in electric field based on conductivity technique
4.3 Materials and methods
4.3.1 Materials and preparation of W／O emulsions
4.3.2 Experimental conditions
4.3.3 Experiments on the measurement of surface and interfa tension
4.3.4 Experiments on interfa coalescence of drops
4.3.5 Experiments on droplets coalescence in pulsed DC electric filed
4.4 Results and discussion
4.4.1 Adsorption at water—oil interfaces
4.4.2 Interfa coalescence of drops
4.4.3 Emulsion stability in pulsed DC electric filed
4.5 Conclusions
Chapter 5 Investigation of the charging characteristics of micron sized droplets based on parallel plate capacitor model
5.1 Introduction
5.2 Principle
5.3 Experimental section
5.4 Results and discussion
5.4.1 Validation of the method
5.4.2 Influence of electrical field strength and ion species
5.4.3 Influence of electrolyte concentration
5.4.4 Influence of droplets size
5.5 Comparison with high electrical field strength
5.6 Conclusions
Chapter 6 Investigation on the influence of the dielectrics on the material removal characteristics of EDM
6.1 Introduction
6.1.1 Type of currently used dielectrics
6.1.2 Role of the dielectrics
6.1.3 Investigation strategy of this work
6.2 Experimental work
6.2.1 Experimental set—up
6.2.2 Experimental procedure
6.2.3 Rebuilt of the crater with 3D—CAD software
6.3 Results and discussion
6.3.1 Definition of the crater shape
6.3.2 Diameter， depth and volume
6.3.3 Removal efficiency
6.3.4 Transient simulation of the discharge generated bubble
6.4 Conclusions
Chapter 7 Transient dynamics simulation of the electrical discharge generated bubble in sinking EDM
7.1 Introduction
7.2 Transient dynamics modeling
7.2.1 Assumptions
7.2.2 Model and boundary conditions
7.2.3 Modeling of the bubble
7.2.4 Governing equation
7.3 Discussion of the simulation
7.3.1 Propagation of the blast wave
7.3.2 Pressure at the center of the discharge spot on the workpieces surface
7.3.3 Force applied on the electrodes
7.3.4 Velocity field in the gap
7.4 Experiments and results
7.4.1 Shape characters of discharge crater
7.4.2 Volume of removed material and removal efficiency
7.4.3 Vibration intensity of workpiece
7.5 Conclusions
Chapter 8 A novel method of determining energy distribution and plasma diameter of EDM
8.1 Introduction
8.2 Energy distribution model of EDM
8.2.1 Principle
8.2.2 Heat conduction analysis
8.3 Experimental work
8.4 Results and discussion
8.4.1 Determination of Xdeb
8.4.2 Determination of Xcon and Rpe
8.4.3 Influence of polarity and dielectric
8.4.4 Comparison with previous researches and discussion
8.5 Conclusions
Chapter 9 Sinking EDM in water—in—off emulsion
9.1 Introduction
9.2 Experiments and methods
9.2.1 Preparation of emulsion
9.2.2 Viscosity of emulsion
9.2.3 Experimental set—up
9.3 Results and discussion
9.3.1 Comparison of EDM machining characteristics using kerosene and W／O emulsion at different peak currents
9.3.2 Comparison of kerosene and W／O emulsion at different pulse durations
9.4 Discussion of the gap phenomenon
9.5 Conclusions
Chapter 10 Study of the recast layer of a surface machined by sinking EDM using water—in—off emulsion as dielectrics
10.1 Introduction
10.2 Experimental procedures
10.3 Results and discussion
10.3.1 SR and RLT
10.3.2 Oxide existed in the recast layer
10.3.3 XRD measurement
10.3.4 EDS measurement
10.3.5 Micro—cracks and micro—voids in the recast layer
10.3.6 Micro hardness
10.4 Conclusions
References

内容摘要
这是一本系统论述基于油包水工作液绿色高效电火花成形加工技术的著作，电火花成形加工作为一种重要的电火花加工技术。然而，目前靠前外常用的电火花成形加工技术存在效率低、能耗大、加工过程中释放有害气体等问题。本书率先提出了研制油包水型工作液替代油类工作液来实现绿色高效电火花成形加工的新方法，研究开发了绿色高效电火花成形加工技术及其专用油包水型工作液。抢先发售建立了评价油包水型工作液在高频脉冲电场中稳定性的数学模型，揭示了电场强度，脉冲宽度等电加工参数以及油包水型工作液的含水量、乳化剂浓度等因素对油包水型工作液稳定性的影响规律，给出了提高油包水型工作液电加工稳定性的方法。率先开展了基于重铸区域几何尺寸测量的放电能量分配与放电通道膨胀特性的研究工作，在实验研究与理论分析的基础上建立了放电通道半径随时间变化的数学模型，明确了放电能量的分配关系。

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基于油包水工作液的绿色高效电火花成形加工

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