Experimental device for tribological measurement aspects in deep drawing process

Roizard, Xavier; Pothier, Jean-Marc; Hihn, Jean Yves; Monteil, Guy

doi:10.1016/j.jmatprotec.2008.03.023

Cited by 15 publications

(11 citation statements)

References 20 publications

(18 reference statements)

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“…Among others, the most often used test methods are the strip drawing test, drawbead simulator friction test and bending under tension test. Strip drawing test is one of these techniques and allows different tool geometry configurations: flat/flat, flat/ cylinder and cylinder/cylinder (Guillon et al, 2001;Roizard et al, 2009). In this test, the macroscopic coefficient of friction is easily measured and usually used to characterise the lubricated contact between tool and metal sheet.…”

Section: Introductionmentioning

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: Introductionmentioning

confidence: 99%

Frictional characteristics of steel sheets used in automotive industry

Trzepieciński

Bazan

Lemu

2015

Int.J Automot. Technol.

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“…specific pressure under the blank holder 8 MPa) was applied. Roizard in [9] stated the scattering is a result of stick-slip sliding regime at low velocities when the static frictional is nonzero. Considering mentioned and the strip velocity 10 mm.s -1 , the effect of the TiCN MP coating resulted in a reduction of scattering the drawing force for specific pressure 4 and 6 MPa and the amplitude of scatters decreased for higher specific pressure 8 MPa.…”

Section: Fig 7 Measuring System At Strip Drawing Testmentioning

confidence: 99%

“…A new friction test method also presented Zhenyu [8]. Roizard [9] presented the improvement of strip drawing test emphasized to the influence of temperature effect, multi-pass, bulk plastic deformation. Kim [10] studied the pressure distribution in draw-bead friction test and its influence on the results of friction coefficient reached.…”

Section: Introductionmentioning

confidence: 99%

Tribology properties evaluation for friction pair Zn coated steel –TiCN MP coated/uncoated tool steel

Evin¹,

Tomáš

2019

Acta Metall Slovaca

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<p class="AMSmaintext1"><span lang="EN-GB">When the sheet metal stamping processes are simulated, different values of the friction coefficient need to be defined in different regions, considering the nature of the deformation process. Thus, the regression and analytical models to determine the friction coefficient under the blankholder and on the die drawing edge by the strip drawing test are presented in the article. These models were verified by experimental strip drawing test under the same contact conditions. Zn coated high strength low alloyed steel sheet H220PD+Z100 was used at experiments and friction tests were done against the tool steel and TiCN MP coated tool steel. The results indicate, that values of friction coefficients evaluated by linear regression are lower than evaluated from analytical models. The positive effect of coating TiCN MP when applied on the contact surfaces was found, thus, decreases the friction coefficient and the drawing force scattering during the strip drawing test.</span></p>

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“…The responses, namely, transfer, wear and friction, were observed to reach a steady state value as sliding progressed. For friction in adhesive wear, the coefficient of friction increased from an initial low value to a higher constant value [14,21,22,24,25,30] with the terms 'running in state' and 'steady state' widely used to describe the adhesive wear condition from unsteadiness to stabilisation [31][32][33]. Although the variation of surface morphology is difficult to make in real time in-situ recordings and can be represented by a range of parameters for various…”

Section: Introductionmentioning

confidence: 99%