Method of Maintaining the Required Values of Surface Roughness and Prediction of Technological Conditions for Cold Sheet Rolling

Valíček, Ján; Harničárová, Marta; Kušnerová, Milena; Zavadil, Jaromir; Grznárik, Radovan

doi:10.2478/msr-2014-0019

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…The technological parameters of the plastic forming processes influence the deformations and dimensional accuracy of the manufactured elements. Cold-and hot-formed thin-walled metal and plastic elements require different control techniques [1,2]. Geometric variability occurs when the thermal energy necessary to form the joint is supplied locally [3].…”

Section: Introductionmentioning

confidence: 99%

Steel Sheet Deformation in Clinch-Riveting Joining Process

Witkowski,

Mucha,

Boda

2024

Metals

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This paper presents the deformation of a joined sheet after the clinch riveting process. The DX51D steel sheet with zinc coating was used. The samples to be joined with clinch riveting technology had a thickness of 1 ± 0.05 mm and 1.5 ± 0.1 mm. The sheet deformation was measured before and after the joining process. The rivet was pressed in the sheets with the same dimension between the rivet axis and three sheet edges: 20, 30, and 40 mm. For fixed segments of the die, from the rivet side close to the rivet, the sheet deformation was greater than that of the area with movable segments. The movement of the die’s sliding element caused more sheet material to flow in the space between the fixed part of the die and movable segments. Hence, the sheet deformation in these places was smaller than for the die’s fixed element—the sheet material was less compressed. For sheet thickness values of 1.5 mm and a width value of 20 mm, the bulk of the sheet was observed. For a sheet width of 20 mm, it was observed that the deformation of the upper and lower sheets in the area of the rivet was greater than for sheet width values of 30 or 40 mm.

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Section: Introductionmentioning

confidence: 99%

Steel Sheet Deformation in Clinch-Riveting Joining Process

Witkowski,

Mucha,

Boda

2024

Metals

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“…The industrial demand for flat product of metal and alloys is very high, which is basically obtained by the process of rolling. The rolling procedure can be divided into cold and hot rolling depending on the temperature maintained during the rolling process [1,2,3]. On the other hand, from the tribological aspect, rolling can be divided into the following groups: rolling with lubricant and dry rolling [1,2,4].…”

Section: Introductionmentioning

confidence: 99%

“…In Eq. ( 2), dh/dt is the wear rate [mm/s]; k is the wear coefficient [mm 3 /Nm] which can be treated as a material parameter; p is surface pressure between the bodies in contact at the point under test [MPa] and dv stands for sliding velocity at the test point [mm/s]. The described relation is not applicable in the initial and very advanced stages of wear [8].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the wear of rolls in asymmetric rolling

Bátorfi¹,

Chakravarty²,

Sidor³

2021

eis

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In the present work, both symmetric and asymmetric rolling processes were investigated by means of numerical approaches. From the algorithm presented, the values of rolling pressure and sliding velocity in the roll gap were determined. These variables allow the estimation of tribological parameters of a given material. To determine the wear of the rolls and rolled materials the Archard's law has been employed. Results of numerical simulations show that the quantitative characteristics of the wear reveal a slight change for slower roll. Whereas the wear value for the faster roll increases with an increase of roll velocity ratio. It was found that for a given roll velocity ratio, rise of friction coefficient causes insignificant change in the wear value for the slower roll, while this value tends to decrease rapidly for the faster roll.

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“…Valicek at al. proposed a method of maintaining the required values of surface roughness and prediction of technological conditions for cold rolling [5].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Periodicities in Surface Topography of Cold rolled sheets Using Data Captured by Camera System

Zavadil

Bartunek

Fojtik

2020

Measurement Science Review

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A method for surface analysis of cold rolled sheets is proposed in this paper. The approach is based on a low-cost specially built camera system followed by spectral analysis of the data captured from metal surfaces. The focus is on the changes in the surface topography caused by cold rolling with emphasis towards periodicities in the processed surface. Angular profile of the spectrum is calculated and used to display periodicities in surface topography and show their direction. The results obtained by using the proposed system were compared with results obtained from the optical profilometer MicroProf FRT. The experiments show that cold rolling creates marks on the surface of the material, which represent periodicities that can be effectively detected by the proposed method and camera system. Even though the camera system is not able to measure precise surface roughness, it is able to detect periodicities and the results of spectral analysis are comparable with the results from the optical profilometer.

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Method of Maintaining the Required Values of Surface Roughness and Prediction of Technological Conditions for Cold Sheet Rolling

Cited by 4 publications

References 7 publications

Steel Sheet Deformation in Clinch-Riveting Joining Process

Steel Sheet Deformation in Clinch-Riveting Joining Process

Investigation of the wear of rolls in asymmetric rolling

Analysis of Periodicities in Surface Topography of Cold rolled sheets Using Data Captured by Camera System

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