Development of a commercial transducer for measuring pressure and friction on a model die surface

Andersen, Claus Bo; Ravn, Bjarne Gottlieb; Wanheim, Tarras

doi:10.1016/s0924-0136(01)00807-x

Cited by 7 publications

(4 citation statements)

References 2 publications

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“…Many investigators, such as Jeswiet and Rice (1982) or more recently, Liu et al (2002) and Andersen et al (2001), have used direct friction pin sensors. However, the presence of the pin disturbs the local lubricant flow at the interface, and the contact marks * Corresponding author.…”

Section: Principlesmentioning

confidence: 99%

A new sensor for the evaluation of contact stress by inverse analysis during steel strip rolling

Weisz-Patrault¹,

Ehrlacher²,

Legrand³

2011

Journal of Materials Processing Technology

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International audienceKnowledge of the contact stress between roll and strip becomes a critical factor in modern, high-speed rolling mills. In this paper, an inverse analytical method is developed to determine the contact stress in the roll gap by measuring the stress tensor with fibre optics at only one point inside the roll. Unlike many inverse methods, no matrix inversion is needed because the very small contact length would lead to ill-conditioned matrices. Iterative methods are also not studied because short computation times are desired. This approach uses the theory of elasticity on the assumption that the problem is isothermal and planar and relies on the expansion of holomorphic functions into a power series. On the other hand, the computation time is studied to rapidly optimise the industrial parameters during the rolling process. Hot, cold and temper-rolling simulations are given to demonstrate the accuracy of the method and the feasibility of this new kind of sensor, taking into account the restrictions (e.g., frequency of acquisition) of the local measurement system

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Section: Principlesmentioning

confidence: 99%

A new sensor for the evaluation of contact stress by inverse analysis during steel strip rolling

Weisz-Patrault¹,

Ehrlacher²,

Legrand³

2011

Journal of Materials Processing Technology

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“…3 However, unsuitability of using mechanical devices for very thick or very hot rolled products is one of the major issues with the mechanical principle for interface conditions measurement during rolling process. 4 Optical principle provides the advantage of non-contact sensors at the metal-roll interface for high-quality surface integrity measurement during manufacturing process but installation and the use of optical systems are not suitable in a very harsh environment, thereby limiting its applications in the metal rolling industry. 1,5 Previously, pulse-echo ultrasonic technique has been used to study metal-roll interface conditions within the roll bite during the cold metal rolling process.…”

Section: Introductionmentioning

confidence: 99%

Non-intrusive measurement of strip thickness and roll-bite length in metal rolling

Adeyemi

Dwyer-Joyce

Pinna

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part B:

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It is important to monitor the rolled strip thickness standard to minimize material waste and loss of profit due to strip flatness defects, and also to maintain the product’s size and dimensional homogeneity. Several online measurement techniques are available but none of this can give an in situ measurement within the roll bite. Due to this, a novice experimental method utilizing ultrasonic reflection sensor mounted on one roll was developed for in situ measurement of strip thickness and roll-bite length during cold rolling process. A pitch–catch method was used whereby a piezoelectric element generated an ultrasonic pulse and transmitted to the contact interface evaluated on a pilot mill. The reflected signal was captured by a second piezoelectric element and analysed to determine the condition at the strip–roll interface. This approach was implemented on a pilot mill and reflections from various locations in the roll bite during the rolling were recorded. Recorded signals were used to estimate the rolled strip thickness and roll-bite length after the rolling process.

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“…Pin sensors already provide measurements of contact stresses, although the presence of the pin disturbs the local lubricant flow at the interface, and the contact strongly marks the strip; industrial use is therefore impossible. Nevertheless, many investigators have designed direct friction pin sensors such as Jeswiet and Rice (1982) for normal stress or Lu et al (2002) for shear stress or Andersen et al (2001) who developed a commercial transducer. An indirect measurement that does not degrade contact conditions has been preferred in this study.…”

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of contact stress during cold rolling process with optical fiber Bragg gratings sensors measurements and fast inverse method

Weisz-Patrault

Maurin

Legrand

et al. 2015

Journal of Materials Processing Technology

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International audienceThere is a strategic importance for the steel rolling industry to get a better understanding of the strip–roll interaction to improve roll-gap models, increase strip quality and decrease roll degradation. This requires roll-gap sensors able to measure this interaction under industrial rolling conditions and in real time in order to propose a feed-back control of process parameters. To reach these goals, this paper proposes a new roll-gap friction sensor based on an inverse method that interprets optical fiber Bragg gratings(FBG) strain measurements under the roll surface (fully embedded), which enables to evaluate contact stresses with very short computation times, compatible with real time interpretation. This elastic inverse method is analytical and relies on plane-strain and isothermal assumptions. The experimental apparatus is detailed, technical issues are clearly exposed as well as calibration procedures. Several pilot cold rolling tests have been performed at various rolling speeds and different strip thicknesses in order to demonstrate the industrial feasibility. Resulting evaluations of contact stresses are then compared with numerical simulations. Reasonable agreement is obtained for normal stress (i.e., pressure) but not for shear stress(only an order of magnitude is obtained)

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Development of a commercial transducer for measuring pressure and friction on a model die surface

Cited by 7 publications

References 2 publications

A new sensor for the evaluation of contact stress by inverse analysis during steel strip rolling

A new sensor for the evaluation of contact stress by inverse analysis during steel strip rolling

Non-intrusive measurement of strip thickness and roll-bite length in metal rolling

Experimental evaluation of contact stress during cold rolling process with optical fiber Bragg gratings sensors measurements and fast inverse method

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