Friction behaviour in strip draw test of pre-stretched high strength automotive aluminium alloys

Masters, Iain; Williams, David; Roy, Rajat

doi:10.1016/j.ijmachtools.2013.05.002

Cited by 41 publications

(35 citation statements)

References 16 publications

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“…During the DBS test the sheet metal strongly resists deformation and is subjected to strain hardening phenomenon. Furthermore, it is stated by Masters et al (2013) that increasing the amount of plastic deformation increases the surface roughness and friction behaviour changes as a result of plastic deformation during metal forming. The influence of initial (original) surface topography of the sheet is not very significant because during the test the sheet is subjected to series of local bending, Table 3.…”

Section: Draw Bead Testmentioning

confidence: 99%

Frictional characteristics of steel sheets used in automotive industry

Trzepieciński

Bazan

Lemu

2015

Int.J Automot. Technol.

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In this paper the results of experimental tests aimed to determine the friction coefficient in sheet metal forming operations for various sheet metal materials and at different operative conditions are presented. The research has considered the frictional characterization of three kinds of drawing quality steels that are commonly used in automotive industry. These are a drawing quality steel (DQ), a deep drawing quality steel (DDQ), and extra deep drawing quality steel (EDDQ). For measurement of the sheet surface topography, a 3D stylus instrument Alicona InfiniteFocus was used. To determine the friction coefficient three tribological tests, i.e. a strip drawing test, a draw bead test and a pin-on-disc tribometer, have been conducted. The experimental results have ascertained several relationships showing the effect of sheet metal surface roughness, lubricant conditions and sheet orientation on the value of friction coefficient in sheet metal forming processes. The results further showed that the surface topography and sample orientation in the rolling direction of the sheet are significant factors that influence the friction coefficient. It was found that the tested steel sheets, selected from automotive industry applications, exhibit anisotropic resistance to the friction corresponding to the measured orientation in relation to the rolling direction of the sheet.

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Section: Draw Bead Testmentioning

confidence: 99%

Frictional characteristics of steel sheets used in automotive industry

Trzepieciński

Bazan

Lemu

2015

Int.J Automot. Technol.

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“…After the forming process of the measuring object, several images were recorded with the ARGUS 5M system, in order to acquire the points positioning from different angles. For the automatic spatial orientation of the individual images, 04011-p. 3 calibrated objects with coded points were positioned close to (or on) the measuring object. The 3D reconstruction of the final measuring object was then obtained/computed using the photogrammetric methods included in the ARGUS software.…”

Section: Digital Image Correlationmentioning

confidence: 99%

“…They concluded that the tribological aspects have profound effect in deciding the drawability of a material in deep MATEC Web of Conferences drawing processes. Masters et al [3] compared the friction behaviour of three commercially available automotive aluminium grades, at different levels of strain, using a strip draw test. The results showed that the friction coefficient increases with the level of strain but the use of solid wax lubricants helps to overcome this maintaining a uniform friction at strains up to 10%.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of deep drawing of C-rail benchmark using various lubricants

Liao

Xue

2015

MATEC Web of Conferences

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Abstract. This paper deals with the deep drawing of C-rail experimental benchmark, which has a complex deformation path. The influence of various lubricants, including the dry friction, low and high viscosity mineral oil, semisolid grease and PTFE film on the drawability of dual-phase steel sheets, was performed. The digital image correlation technique was applied for component tests as well as the deformation analysis. The drawability was experimentally assessed by comparing surface roughness, thickness reduction, and springback of drawn component. The experimental results indicate that the interfacial lubrication between tools and work-piece plays an important role on the drawability of advanced high strength steel sheets. The quality of component was improved obviously by using PTFE film compared to the other lubricants.

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“…[1,2]. This research mainly focusses on friction phenomena, but its description is very diffi-cult because it is also affected by various factors like type and thickness of the lubricant, tool geometry, surface condition of both tool and workpiece and process parameters (sliding velocity, contact pressure and temperature) and it is not thoroughly understood [3][4][5]. Friction has influence on drawing forces, blank holder forces, developed stresses and strains in the workpiece and therefore also on the final quality of the product.…”

Section: Introductionmentioning

confidence: 99%

Mathematical modelling of an experimental‐analytical method for friction coefficient determination in deep drawing

Lela

Krolo

Mirić

2019

Materialwissenschaft Werkst

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The main aim of this paper is to determine the friction coefficient μ and maximum drawing force in deep drawing process of aluminum alloy EN AW 1050 utilizing strip drawing method. Influence and interaction between lubrication condition, blank holder force and strip surface roughness on maximum drawing force and friction coefficient are investigated. Response surface methodology and D‐Optimal design are utilized in order to create an experimental plan. According to the design, 23 strip drawings experiments are performed and statistical analysis was done. The regression and variance analysis results with 18 significant mathematical models which are derived in order to describe influence of mentioned parameters on friction coefficient and maximum drawing force. Results are discussed according to previous research. Finally, the optimization of processing parameters is performed aiming for lower friction coefficient and maximal drawing force.

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Friction behaviour in strip draw test of pre-stretched high strength automotive aluminium alloys

Cited by 41 publications

References 16 publications

Frictional characteristics of steel sheets used in automotive industry

Frictional characteristics of steel sheets used in automotive industry

Experimental investigation of deep drawing of C-rail benchmark using various lubricants

Mathematical modelling of an experimental‐analytical method for friction coefficient determination in deep drawing

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