Influence of Workpiece Surface Topography on the Mechanisms of Liquid Lubrication in Strip Drawing

Shimizu, Ichiro; Andreasen, Jan Lasson; Bech, Jakob Ilsted; Bay, Niels

doi:10.1115/1.1308017

Cited by 31 publications

(14 citation statements)

References 7 publications

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“…Besides the surface modification of tools, the workpiece surface topography is also an important factor controlling the mechanisms of lubrication in metal forming processes [81]. In micro-deep drawing, Wang et al performed the surface modification of copper foil using the ion beam irradiation method.…”

Section: Micro Structured Surfacementioning

confidence: 99%

Friction related size-effect in microforming – a review

2014

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This paper presents a thorough literature review of the size effects of friction in microforming. During miniaturization, the size effects of friction occur clearly. The paper first introduces experimental research progress on size effects of friction in both micro bulk and sheet forming. The effects of several parameters are discussed. Based on the experimental results, several approaches have been performed to develop a model or functions to analyse the mechanism of size effects of friction, and simulate the micro deep drawing process by integrating them into an FE program. Following this, surface modification, e.g. a DLC film and a micro structure/textured surface, as a method to reduce friction are presented. Finally, the outlook for the size effect of friction in the future is assessed, based on the understanding of the current research progress.

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Section: Micro Structured Surfacementioning

confidence: 99%

Friction related size-effect in microforming – a review

2014

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“…In the last two decades many researchers studied different aspects of the interaction between friction and lubricant. Sørensen et al [1] and Shimizu et al [2] investigated aspects of the tribological behaviour by looking at the influence of surface and lubrication on the frictional behaviour of sheet metals and came to the conclusion, that there is a close dependence between the lubricant behaviour and the geometry of the lubricant pockets. Azushima [3,4] investigated the influence of compression speed on lubricant behaviour using a measurement setup enabling the in-situ investigation of the contact area in the workpiece-tool interface.…”

Section: Introductionmentioning

confidence: 98%

Novel setup for the investigation of tribological behavior of sheet metal surfaces

2009

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In sheet metal forming processes tribological conditions have a significant influence on the quality of the produced part, the tool life time as well as the process stability. Due to the contact pressures in the workpiece-tool interface, mixed lubrication is predominant. Thus, the appearing real contact area has a major influence on the frictional conditions. During the forming process the real contact area increases, because of the flattening of topography asperities. For the investigation of flattening behaviour and the so connected changes in friction a new modular test rig for strip drawing tests has been developed. To gain additional information about the contact behaviour of texturized sheet metal surfaces during the tests, it is possible to alternate between two different measurement setups to investigate changes in the workpiece-tool interface in-situ. In the first setup, an ultrasonic inspection system is used while the second setup is based on optical techniques. In this paper the two measurement setups and the planned investigations are described.

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“…Azushima et al [Azushima1990], Bech et al , Sørensen et al and Shimizu et al used a test rig to study these lubricant flows in strip drawing. Through a tool made of glass, they observed the behaviour of macroscopic pyramidal indentations filled with lubricant.…”

Section: Introductionmentioning

confidence: 99%

Numerical modelling of microscopic lubricant flow in sheet metal forming. Application to plane strip drawing

Carretta

Boman

Bech

et al. 2017

Numerical Meth Engineering

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This paper presents a numerical investigation of microscopic lubricant flows from the cavities to the plateaus of the surface roughness of metal sheets during forming processes. This phenomenon, called micro-plasto-hydrodynamic (MPH) lubrication, was observed experimentally in various situations such as compression sliding tests, strip drawing and cold rolling. It leads to local friction drop and wear reduction. It is therefore critical to achieve a good understanding of this phenomenon.To move towards that goal, a multiscale fluid-structure interaction (FSI) model is developed to model lubricant flows at the microscopic scale. These simulations are made possible through the use of the Arbitrary Lagrangian Eulerian (ALE) formalism.In this paper, this methodology is used to study plane strip drawing. The numerical model is able to predict the onset of lubricant escape and the amount of lubricant flowing on the plateaus. Numerical results exhibit good agreement with experimental measurements.

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Influence of Workpiece Surface Topography on the Mechanisms of Liquid Lubrication in Strip Drawing

Cited by 31 publications

References 7 publications

Friction related size-effect in microforming – a review

Friction related size-effect in microforming – a review

Novel setup for the investigation of tribological behavior of sheet metal surfaces

Numerical modelling of microscopic lubricant flow in sheet metal forming. Application to plane strip drawing

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