Micropunching large-area metal sheets using underwater shock wave: Experimental study and numerical simulation

Tanaka, Shigeru; Батаев, И. А.; Nishi, Masatoshi; Balagansky, Igor; Hokamoto, Kazuyuki

doi:10.1016/j.ijmachtools.2019.103457

Cited by 23 publications

(8 citation statements)

References 37 publications

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“…The installation of a PVDF gauge on a rigid body is the supplier’s recommended method of application. The typical pressure profile of the shock wave obtained in this case is a triangle, representing a sharp rise and decay in pressure, with only one peak [ 16 ]. In this study, a characteristic profile with two peaks was obtained, which can be attributed to the deformation of the PC plate.…”

Section: Resultsmentioning

confidence: 99%

“…Water is a suitable medium for transmitting the pressure and protecting the sample from the heat of the explosion. The shock pressure received by the Al workpiece depends on the distance H. The pressure history applied to the Al workpiece was evaluated using a polyvinylidene difluoride (PVDF) gauge, as was described in our previous study [16]. The PVDF gauge, PVF2-11-125-EK (Dynasen, Inc., Goleta, CA, United States), was glued to the surface of the Al workpiece, layered on the PC plate.…”

Section: Methodsmentioning

confidence: 99%

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Toward a Better Understanding of Shock Imprinting with Polymer Molds Using a Combination of Numerical Analysis and Experimental Research

et al. 2022

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In the last decade, a new technique has been developed for the nanoimprinting of thin-metal foils using laser-induced shock waves. Recent studies have proposed replacing metal or silicone molds with inexpensive polymer molds for nanoimprinting. In addition, explosive-derived shock waves provide deeper imprinting than molds, greatly simplifying the application of this technology for mass production. In this study, we focused on explosive-derived shock waves, which persist longer than laser-induced shock waves. A numerical analysis and a set of simplified molding experiments were conducted to identify the cause of the deep imprint. Our numerical analysis has accurately simulated the pressure history and deformation behavior of the workpiece and the mold. Whereas a high pressure immediately deforms the polymer mold, a sustained pressure gradually increases the molding depth of the workpiece. Therefore, the duration of the pressure can be one of the conditions to control the impact imprint phenomenon.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Toward a Better Understanding of Shock Imprinting with Polymer Molds Using a Combination of Numerical Analysis and Experimental Research

et al. 2022

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“…The reported maximum measured pressure is higher than 30 GPa [ 14 ] and the response time is of the order of the nanosecond. They are currently used for blast [ 15 ] and shock pressure measurement [ 16 , 17 ], they have been described by F. Bauer [ 14 ]: the PVDF semi-crystalline polymer is mechanically stretched and polarised under the effect of a high voltage electric field in order to obtained a calibrated piezo-electric effects described in Figure 2 .…”

Section: Materials and Methodsmentioning

confidence: 99%

PVDF Based Pressure Sensor for the Characterisation of the Mechanical Loading during High Explosive Hydro Forming of Metal Plates

Tartiere

Арригони

Nême

et al. 2021

Sensors

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High explosive hydro forming (HEHF) is a suitable technique for large metal plate forming. Manufacturing stages of such a part requires an adapted design of explosive charge configurations to define the mechanical loading exerted on the part. This mechanical loading remains challenging to be experimentally determined but necessary for predictive numerical simulation in the design of parts to form. Providing that the actual mechanical impulse would allow the neglecting of the modelling of the detonation stage, this considerably increases the computational time. The present work proposes an experimental method for obtaining the exerted mechanical loading by HEHF on the part to form. It relies on the development of low-cost sensor based on a polyvinyliden fluorid (PVDF) gauge. In addition to it, an analytical approach based on shock physics is proposed for the sensor signal interpretation. The method considers the multi-layer aspect of the sensor and its intrusiveness with respect to waves propagation. Measurements were repeated to assess their relevance and the reproducibility by using steel and aluminium anvils in HEHF. Numerical modelling in 2D plane geometry of the experiments was performed with two commercial hydrocodes. The comparison of mechanical impulses shows an agreement in terms of chronology but a noticeable difference in terms of amplitude, explained by mesh size and numerical diffusion.

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“…Micro blanking is a plastic deformation technology [11]. Since the 21 st century, this technology is widely studied by the global researchers [12][13][14][15][16][17]. Joo [9] and Xu [12,18] et al applied the traditional rigid blanking technology to micro blanking process of brass and stainless steel foil, and successfully obtained workpieces with microhole of good size.…”

Section: Introductionmentioning

confidence: 99%

“…Based on the softening effect of ultrasonic vibration, the maximum punching force was reduced and burnish rate of fracture surface was obviously increased. In order to overcome the problem how to meet between micro-punch and die, the flexible micro blanking technology is developed [14][15][16][17]. Liu [21] et al applied the laser dynamic micro-blanking technology for Al foils to punch square microhole and achieved success.…”

Section: Introductionmentioning

confidence: 99%

Die design for fine micro-blanking process

Liu

Zhang

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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As the increase in demand for microparts of metal foil, the micro-blanking process with many advantages of plastic deformation has been widely applied on microparts manufacturing area. But the fracture zone of shearing surface is always present and affects the service life of the part. This paper proposes a new micro-blanking die based on fine blanking technology. In this die, the rubber as the power transmission device is selected to provide a blank holder force and counter force. In the FEM simulation, the influence of a few key die parameters is considered such as punching clearance and fillet radius of female die and punch. And the fine micro-blanking experiments for superalloy foils were conducted to evaluate the feasibility of the die designs. The results had shown the fine micro-blanking die proposed was able to be used for micro-blanking and obtain metal microparts.

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Micropunching large-area metal sheets using underwater shock wave: Experimental study and numerical simulation

Cited by 23 publications

References 37 publications

Toward a Better Understanding of Shock Imprinting with Polymer Molds Using a Combination of Numerical Analysis and Experimental Research

Toward a Better Understanding of Shock Imprinting with Polymer Molds Using a Combination of Numerical Analysis and Experimental Research

PVDF Based Pressure Sensor for the Characterisation of the Mechanical Loading during High Explosive Hydro Forming of Metal Plates

Die design for fine micro-blanking process

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