Controllability of Temperature Induced Friction Effects during Deep Drawing of Car Body Parts with High Drawing Depths in Series Production

Kott, Matthäus; Erz, Christian; Heingärtner, Jörg; Groche, Peter

doi:10.1016/j.promfg.2020.04.166

Cited by 18 publications

(6 citation statements)

References 9 publications

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“…RSM6. This is in agreement with the results of the sensitivity analysis regarding the dominant influence of friction, taking into account that the draw-in is a suitable indicator to reflect changes of the frictional behaviour due to changes in the resulting restraining forces [43]. The application of a more complex model like ANN allows the reduction of the number of necessary measurands without loss in performance (no.…”

Section: Preselection Of Measurands Based On Observabilitysupporting

confidence: 87%

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Methodological approach for the development of an operator assistance system for the press shop

Kott¹,

Echler

Groche

2021

Int J Adv Manuf Technol

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The productivity of a deep drawing process strongly relies on its robustness as well as the experience of the machine operator. Steadily increasing requirements regarding weight, design and efficiency lead to a production operating increasingly closer to the process limits, making it more challenging to ensure a high robustness of the process. Minimal process fluctuations caused by disturbances such as varying material properties or changing tribological conditions may negatively affect the process due to deteriorated product properties as well as an increased risk of scrap. Thus, a target-oriented adjustment of available parameters by the machine operator becomes more difficult, and an increased knowledge about the causes of defects is more important. In the past, several approaches with different combinations of sensors and actuators have been investigated to enable a stable process window based on a control system. This paper presents a method to address the need for a more robust process by developing an operator assistance system that enables the identification of the component state and provides decision support to the machine operator. The methodological approach includes a thorough process analysis to evaluate the expediency of such a system and to make a reasonable preselection of sensors in order to avoid unnecessary costs.

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Section: Preselection Of Measurands Based On Observabilitysupporting

confidence: 87%

“…The measurement data will not be discussed in-depth in this paper, since a detailed analysis with regard to the influence of temperature, blank holder force and lubrication on the material flow in the flange has already been carried out in [43].…”

Section: Identification Of the Component Statementioning

confidence: 99%

Methodological approach for the development of an operator assistance system for the press shop

Kott¹,

Echler

Groche

2021

Int J Adv Manuf Technol

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“…Several authors, including Sigvent et al [1] and Hol et al [2], have outlined the importance of dynamic friction models (dependent on pressure, velocity and straining) and the coating on the material. An addition to the discussion on tribology recently raised by Waanders et al [3] and Kott et al [4] is the impact of temperature increases on friction behaviour during running production.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Temperature Impact on Friction Conditions in Running Production of Automotive Body Components

Barlo,

Sigvant,

Pilthammar

2024

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

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During the running production of automotive body components drifts in the process window is seen causing problems with non-conforming parts. Up until now, these drifts have been counter-acted based on the knowledge and experience of the press line operators. This experience-based process control will however become more troublesome in the future as recycled material grades will undoubtedly present larger in-coil variations in material parameters and effect also the friction conditions from component to component. The following study will present two cases from production of the Volvo XC60. For the two cases, the initial simulations made for the components showed a safe part, but during running production failure occurred suspected to be due to temperature effects in the tribology system. The study will furthermore present updated simulations considering developing thermal effects to replicate the failures, as well as present both standard and thermal simulations of the adjustments made in production.

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“…In addition to the mentioned parameters, several research works a rm that the friction in the DDP can also be in uenced by other parameters: contact area, lubricant, temperature, surface topography and oil lm thickness. These parameters have been the subject of several experimental and numerical studies [4,[7][8][9][10][11][12][13][14][15][16][17][18] which state the need to take a variable COF or at least to evaluate it in different zones of the forming process.…”

Section: Introductionmentioning

confidence: 99%

Combined effect of inhomogeneous strain-induced and anisotropy on friction in deep drawing of DC06EK sheet metal

BELGUEBLI

Zidane

2022

Preprint

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The aim of this work is to simultaneously evaluate the effects of inhomogeneous strain-induced and anisotropy on the friction during the deep drawing of DC06EK sheet metal. To do that, stretched and unstretched DC06EK strips in different rolling directions (0°, 45° and 90°) with different levels of equivalent plastic strain were used in microscratch tests under the same conditions as those used in deep drawing process (DDP) coming from a local industry. The findings show that the coefficient of friction (COF) decreases as a function of the equivalent plastic strain for different rolling directions. Two empirical friction laws are obtained depending on the equivalent plastic strain following 0° and 90° to the rolling direction. Since the COF have a clear trend of regression except in the case for 45°. Trend lines of the COF following 0° and 90° converge to very closely values, since the effect of anisotropy disappears with the increase in the level of plastic strain.

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Controllability of Temperature Induced Friction Effects during Deep Drawing of Car Body Parts with High Drawing Depths in Series Production

Cited by 18 publications

References 9 publications

Methodological approach for the development of an operator assistance system for the press shop

Methodological approach for the development of an operator assistance system for the press shop

Investigation of Temperature Impact on Friction Conditions in Running Production of Automotive Body Components

Combined effect of inhomogeneous strain-induced and anisotropy on friction in deep drawing of DC06EK sheet metal

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Controllability of Temperature Induced Friction Effects during Deep Drawing of Car Body Parts with High Drawing Depths in Series Production

Cited by 18 publications

References 9 publications

Methodological approach for the development of an operator assistance system for the press shop

Methodological approach for the development of an operator assistance system for the press shop

Investigation of Temperature Impact on Friction Conditions in Running Production of Automotive Body Components

Combined effect of inhomogeneous strain-induced and anisotropy on friction in deep drawing of DC06EK sheet metal﻿

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Product

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Combined effect of inhomogeneous strain-induced and anisotropy on friction in deep drawing of DC06EK sheet metal