Use of micro ultrasonic vibration lapping to enhance the precision of microholes drilled by micro electro-discharge machining

Wang, A-Cheng; Yan, Biing Hwa; Li, Xiang Tai; Huang, Fuang Yuan

doi:10.1016/s0890-6955(02)00025-1

Cited by 49 publications

(25 citation statements)

References 20 publications

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“…As its importance, many researchers carried out relevant studies on micro machining. Wang et al proposed a composite processing technology which combines electrical discharge machining with ultrasonic vibrating grinding to process micro-pores [2]. A spiral polishing method applied in finishing the micro-pores is proposed by Yan et al [3].…”

Section: Figure 1 Components and Operating Principle Of Dtgmentioning

confidence: 99%

Stable Grinding Micro-wall of Flexible Joints with Controllable Force

Ding

Wang

2016

MATEC Web Conf.

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Abstract. The micro-wall between two adjacent pores on the flexible joint is the core structure affecting the performance of gyro. The thickness of the micro-wall is only about 30 m P and decreases to 20 m P after being machined. It is a low-stiffness structure easily affected by grinding force. Larger force can break the micro-wall. Hence, appropriate grinding force must be controlled to make balance between machining efficiency and surface quality. Besides, different thickness before being machined affects the machining stability as well. The present paper firstly introduces the developed machine tool used for grinding the micro-walled. With this machine tool, removal of the process can be measured as well. Detailed measuring theory and grinding processes are presented. The force can be adjusted and monitored in the microgrinding process. To achieve stable removal, the related thickness is analysed by experiments. With this machine tool, the process of machining-measuring micro-wall is efficient.

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Section: Figure 1 Components and Operating Principle Of Dtgmentioning

confidence: 99%

Stable Grinding Micro-wall of Flexible Joints with Controllable Force

Ding

Wang

2016

MATEC Web Conf.

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“…Many methods have been proposed to enhance the surface roughness during the polished machining [1][2]. But they either cost long time to work or limit the machined shape.…”

Section: Introductionmentioning

confidence: 99%

“…Silicone rubber (a kind of polymer gel) with high viscosity and low flow rate is a good abrasive medium which can easily polish the WEDM surface to a smooth fmish [10]. Furthermore, a new fmishing method by applying a magnetic field around the workpiece has been proposed to enhance the (1) (2) material removal rate and the surface roughness in AFM [11][12].…”

Section: Introductionmentioning

confidence: 99%

Study of the rheological properties and the finishing behavior of abrasive gels in abrasive flow machining

Wang¹,

Liu²,

Liang³

et al. 2007

J Mech Sci Technol

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Abrasive flow machining (AFM) is an effective method to finish the smooth surface in the complex holes. Abrasive media are key elements which dominate the polished results in AFM. But it is hard to develop the machining model of these abrasive gels because of its complicated mechanism. In this research, a non-Newtonian flow is used to set up the abrasive mechanism of the abrasive media in AFM. Power law is a main equation of the non-Newtonian flow to describe the motion of the abrasive media. Viscosities vs. shear rates of different abrasive gels are used to establish the power law in CFD-ACE+ software first. And the working parameters of AFM were applied as input to study the properties of the abrasive gels in AFM. Finally, the relationships between the simulations and the experiments were found. And the abrasive mechanism of the abrasive gels was set up in AFM. The simulated results show that the abrasive gel with high viscosity can entirely deform in the complex hole than the abrasive gel with low viscosity. And the abrasive gel with high viscosity generates a larger shear force than the abrasive gel with low viscosity in the same area. Moreover, the strain rate is seriously changed when the abrasive gel cross over the narrow cross-section of the complex hole. It also means that abrasive gel will produce large finish force in that area. And these results indeed consist with the experiments in AFM.

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“…In addition to manufacturing electrical conductors, micro-EDM can also be used to manufacture insulators, such as glass, by being combined with electrochemical machining (ECM) [3]. It can also combine with micro ultrasonic vibration to manufacture micro-holes in different materials [4,5]. Moreover, micro-EDM can be combined with other micro-manufacturing technologies to manufacture micro-components [6][7][8][9][10].…”

mentioning

confidence: 99%

Fracture strength analysis of micro WC-shaft manufactured by micro-electro-discharge machining

Huang

Yan

2004

Int J Adv Manuf Technol

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Micro-electro-discharge machining (micro-EDM) is a potential micro-manufacturing technology. However, the surfaces of micro-components manufactured by micro-EDM will exhibit micro-cracks and micro-craters, and then micro-cracks and micro-craters will produce notch effects leading to stress concentration and reduction of fatigue strength. In particular, the roughness and size of tiny components strongly affect the strength of micro-scale components. Therefore, this study performs micro-tensile tests for micro-shaft specimens of various roughness and size to investigate the influence of roughness and size on the fracture strength of micro WC-shafts manufactured by micro-EDM. Experimental results indicate that the surface roughness, axial surface area, volume, and length of the specimen affect its fracture strength. For specimens of the same size, the mean fracture strength decreases as the surface roughness increases, and the fracture probability of the specimens also increases (roughness effect). For specimens with the same diameter and roughness, increasing the length, volume or axial surface area reduces the mean fracture strength, and increases the fracture probability (size effect).

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Use of micro ultrasonic vibration lapping to enhance the precision of microholes drilled by micro electro-discharge machining

Cited by 49 publications

References 20 publications

Stable Grinding Micro-wall of Flexible Joints with Controllable Force

Stable Grinding Micro-wall of Flexible Joints with Controllable Force

Study of the rheological properties and the finishing behavior of abrasive gels in abrasive flow machining

Fracture strength analysis of micro WC-shaft manufactured by micro-electro-discharge machining

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