Development of a new machine system for the forming of micro-sheet-products

Qin, Yi; Ma, Yanling; Harrison, Colin; Brockett, Andrew; Zhou, Mi; Zhao, Jie; Law, Fraser; Razali, Akhtar Razul; Smith, Richard P.; Eguia, J.

doi:10.1007/s12289-008-0098-9

Cited by 43 publications

(22 citation statements)

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“…those having dimensions between 2 and 20 mm [7], with ultra-thin sheets, lead to low production cost and low energy consumption compared to those of larger parts [8,9]. The latest development in forming processes have demonstrated that progressive die micro-stamping may be used to plastically deform ultra-thin sheets [10]. In successive stages, the metal strip is punched and bent successively to obtain the finished part.…”

Section: Introductionmentioning

confidence: 99%

Anti-Buckling Device for Ultra-Thin Metallic Sheets Under Large and Reversed Shear Strain Paths

et al. 2017

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The kinematic contribution to the hardening of ultra-thin metallic sheets characterized by monotonic and reversed simple shear tests is of high interest in the sheet metal forming industry, because of its influence on the accurate prediction of springback. However, ultra-thin sheets are very sensitive to buckling when submitted to shear stress because of the large gauge width to thickness ratio, the stress perturbations induced by the clamping and the alignment of sample, which thus limit the attainable strain levels using conventional simple shear devices. In this paper, a new simple shear test dedicated to ultra-thin metallic sheets is proposed through the development of a specific support. A transparent glass part enables the application of a normal tightening force to prevent the out-of-plane buckling of the sheets whilst also allowing full field strain measurements to be taken. Firstly, the capabilities of the device are shown by comparing the mechanical behavior in a simple shear test on an austenitic stainless steel with and without the support. A good reproducibility of the flow curves is observed with the support and large shear strains are reached without buckling. Secondly, the influence of friction due to the contact between the sample and the support is checked by finite elements simulations and shown to be negligible compared to the shearing force. Finally, monotonic and reversed shear tests on a pure copper sheet with a thickness of 0. were performed up to rupture without buckling, these were not previously conceivable on such a low thichness, and demonstrate the potential of the proposed device.

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Section: Introductionmentioning

confidence: 99%

Anti-Buckling Device for Ultra-Thin Metallic Sheets Under Large and Reversed Shear Strain Paths

et al. 2017

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“…Main prime mover is linear motor with maximum slide speed: 110 m/s 2 . Flexible -Forming with capacity of 5.3 kN was developed by Y. Qin et al [4] with load-measurement resolution of sebesar 0.1 N. Presz et al [5] and Arentoft et al [6] developed micro-forming machine with capacity of 5 kN and 50 kN using different actuator. Prescz used piezoelectric, while Arentoft used servo motor.…”

Section: Introductionmentioning

confidence: 99%

Development and Measurement of 5 kN -Forming Machine

Mahmudah¹

2017

JEMMME

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“…This technology could make a large contribution to the micro-scale manufacturing [15][16] which requires the thickness range of 5-100 µm [17][18][19][20] with positional precision in the range of 0.1 to 10 µm [21], for microactuators based on lead zirconate titanate (PZT) [22] to provide wide deflections and high actuation force [23]. There is another strong problem connected with the layer-based manufacturing technologies for instance layer stairstepping effect [24].…”

Section: Introductionmentioning

confidence: 99%

Accelerated Algorithm for Solids of Revolution Converting into Ribbon by Spiral Coordinate System

Esheeva¹

2017

IJIES

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Abstract:The article considering the problem of quick transformation of solids of revolution into raster layer for Roll Powder Sintering (RPS) additive manufacturing technology. The author describes the algorithm for solving this problem. This work is devoted to the development and the validation of the impetuous algorithm for converting the 3D coordinates of a solid of revolution to spiral coordinates. It is based on the assumption that one point on the figure of revolution is predetermined multitude of points in the spiral coordinate system and these can be defined without calculations because of symmetry properties. Such method provides to accelerate the performance of the coordinate conversion thousand fold and real time forming objects 1.5 m 3 in volume with layer thickness ~25 µm by non-powerful computers per hour. The proposed algorithm has been extensively tested and proven by numerical examples of several parts of computer aided design models. It is faster than other coordinates transformations and can be extended to the acceleration converting and processing geometry of 3D objects.

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Development of a new machine system for the forming of micro-sheet-products

Cited by 43 publications

References 1 publication

Anti-Buckling Device for Ultra-Thin Metallic Sheets Under Large and Reversed Shear Strain Paths

Anti-Buckling Device for Ultra-Thin Metallic Sheets Under Large and Reversed Shear Strain Paths

Development and Measurement of 5 kN -Forming Machine

Accelerated Algorithm for Solids of Revolution Converting into Ribbon by Spiral Coordinate System

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