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Dimkovski, Z., Rebeggiani, S., Anderberg, C., Ohlsson, R. & Rosén, B. G. (2024). Automotive Applications—Cylinder Liners and Tool Steel Polishing for Injection Moulding of Plastic Parts (2ed.). In: Richard Leach (Ed.), Characterisation of Areal Surface Texture: (pp. 295-321). Switzerland: Springer Nature
Open this publication in new window or tab >>Automotive Applications—Cylinder Liners and Tool Steel Polishing for Injection Moulding of Plastic Parts
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2024 (English)In: Characterisation of Areal Surface Texture / [ed] Richard Leach, Switzerland: Springer Nature, 2024, 2, p. 295-321Chapter in book (Refereed)
Abstract [en]

Surfaces are vital for a range of functions for automotive components. The visual appearance and cleanability of injection moulded plastic parts depend on the control of the polished mould finish. It is also of interest to reduce oil consumption and frictional losses in internal combustion engines, which are heavily influenced by the quality of the cylinder liner surface. The plateau cross-hatch topography of a cylinder liner consists of a system of grooves of different density, width and depth, some parts covered by folded metal, and some parts totally interrupted and unbalanced as a result of imperfection in the honing process. These grooves are critical for good liner function and need to be quickly and objectively quantified for an efficient surface finish development. A suitable way to do this is to use coherence scanning interferometry and to combine profile and image analysis. Thus, the features/parameters, such as honing angle, balance of honing texture, groove interrupts, width, height and distance between grooves, are successively quantified. Here, these parameters, along with areal surface texture parameters in the published ISO specification standard, were used in three case studies. The first case study is on the effect of the folded metal on the surfaces of run truck liners, the second is an evaluation of the improvements of the surface quality introduced by the diamond honing in production of car liners. In addition, based on the significant parameters of the surface, a general characterisation tool for qualifying the surface quality and determination of the required number of measurements is presented. The third case is implementing the methodologies developed for engine liner characterisation for polished tool steels. The case worked well after it had been modified and adapted to these types of surfaces. Also, the scratch patterns on the polished samples, quantified in terms of width and depth, are important parameters that indicate whether the topography of a polished tool steel surface has reached a sufficient quality level, and supports the monitoring of how the polishing steps affect the surface topography © The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

Place, publisher, year, edition, pages
Switzerland: Springer Nature, 2024 Edition: 2
National Category
Manufacturing, Surface and Joining Technology
Identifiers
urn:nbn:se:hh:diva-54588 (URN)10.1007/978-3-031-59310-9_11 (DOI)2-s2.0-85206032755 (Scopus ID)978-3-031-59309-3 (ISBN)978-3-031-59310-9 (ISBN)
Available from: 2024-09-10 Created: 2024-09-10 Last updated: 2025-01-22Bibliographically approved
Urville, C., Souvignet, T., Dimkovski, Z. & Cabanettes, F. (2022). Honing process parameters influence on surface topographies. In: Joel RECH; José Outeiro (Ed.), 6th CIRP Conference on Surface Integrity: . Paper presented at 6th CIRP Conference on Surface Integrity, Lyon, France, June 8-10, 2022 (pp. 448-453). Amsterdam: Elsevier, 108
Open this publication in new window or tab >>Honing process parameters influence on surface topographies
2022 (English)In: 6th CIRP Conference on Surface Integrity / [ed] Joel RECH; José Outeiro, Amsterdam: Elsevier, 2022, Vol. 108, p. 448-453Conference paper, Published paper (Refereed)
Abstract [en]

Honing is a superfinishing process that generates fine surface topographies with interesting tribological properties. However the control of the process requires highly experienced operators. The selection of proper stones (abrasive grit size and type) is decisive for reaching the target topography. Furthermore, especially in the case of a feed controlled process, the stone expansion must be in adequacy with the selected stone. This paper proposes to investigate the effect of the abrasive grit size for different stone expansions on surface topographies generated during the honing process. Honed samples are produced by a specific test bench reproducing the honing kinematics and recording process induced forces. In total, two hundred forty areal surface topography measurements are analyzed and discussed alongside with the force measurements. A systemic analysis of a wide range of roughness parameters is performed. Results demonstrate that the grit size has a significant impact on the final topography signature. Furthermore, even though expansion speed was doubled, no obvious influence was observed on the surface roughness parameters except one (isotropy Str). Based on these observations it is suggested that the expansion speed has a limited impact on the number of grooves generated. © 2022 The Author(s).

Place, publisher, year, edition, pages
Amsterdam: Elsevier, 2022
Series
Procedia CIRP, E-ISSN 2212-8271
Keywords
expansion speed, honing process, stone grit size, Surface topography
National Category
Manufacturing, Surface and Joining Technology Other Mechanical Engineering
Identifiers
urn:nbn:se:hh:diva-48169 (URN)10.1016/j.procir.2022.03.070 (DOI)2-s2.0-85134589265 (Scopus ID)
Conference
6th CIRP Conference on Surface Integrity, Lyon, France, June 8-10, 2022
Available from: 2022-09-29 Created: 2022-09-29 Last updated: 2025-02-14Bibliographically approved
John, S., El-Ghoul, Z., Dimkovski, Z., Lööf, P.-J., Lundmark, J. & Mohlin, J. (2019). Friction between pin and roller of a truck's valvetrain. Surface Topography: Metrology and Properties, 7(1), Article ID 014001.
Open this publication in new window or tab >>Friction between pin and roller of a truck's valvetrain
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2019 (English)In: Surface Topography: Metrology and Properties, E-ISSN 2051-672X, Vol. 7, no 1, article id 014001Article in journal (Refereed) Published
Abstract [en]

In order to minimize the fuel consumption in internal combustion engines, the frictional losses must be minimized between the moving parts such as the sliding bearings. In this study, the sliding friction between the pin and roller in a heavy duty truck engine's valvetrain has been investigated. Three combinations of production components with different surface treatment were used: steel pin with steel roller, steel pin with WS2 coating inside the roller and PVD coated steel pin with steel roller. In-house test rig was used, enabling controlled conditions close to the real engine. A new method for alignment using a laser scanner was introduced together with high resolution tactile measurements of radial displacement during test. Surface topography of pins and rollers was measured before test with a mechanical stylus instrument. The WS2 showed 3.1 times and the PVD showed 2.5 times lower friction than the steel type at low speeds. Even though the friction reduction of WS2 over the PVD is not large, the important advantage is that the WS2 can be manufactured at lower costs than the PVD one. Good correlations among the friction, initial roughness and radial displacements were also found.

Place, publisher, year, edition, pages
Bristol: Institute of Physics Publishing (IOPP), 2019
Keywords
tribology, WS2 coating, PVD coating, surface roughness, topography, friction, valvetrain
National Category
Other Mechanical Engineering
Identifiers
urn:nbn:se:hh:diva-38760 (URN)10.1088/2051-672X/aafe47 (DOI)000459745900001 ()2-s2.0-85067785445 (Scopus ID)
Funder
Vinnova
Available from: 2019-01-15 Created: 2019-01-15 Last updated: 2025-02-14Bibliographically approved
Anderberg, C., Dimkovski, Z., Rosén, B. G. & Thomas, T. R. (2019). Low friction and emission cylinder liner surfaces and the influence of surface topography and scale. Tribology International, 133, 224-229
Open this publication in new window or tab >>Low friction and emission cylinder liner surfaces and the influence of surface topography and scale
2019 (English)In: Tribology International, ISSN 0301-679X, E-ISSN 1879-2464, Vol. 133, p. 224-229Article in journal (Refereed) Published
Abstract [en]

A low friction piston ring pack, with tangential load halved, was tested in engines with four different cylinder liner finishes. Oil consumption, oil temperature and liner surface temperature were monitored at different load and speed levels, under similar test conditions. The two smoother surfaces generally kept lower oil consumption compared to the two rougher ones. Results were correlated using an area-fractal analysis. The relative area of the surface was calculated at different scales and the result was compared with the level of oil consumption for the different liner surfaces at different engine speeds. It was found that oil consumption was strongly correlated with scale for areas of above 1000 μm2 and below 20 μm2.  © 2018

Place, publisher, year, edition, pages
Kidlington: Pergamon Press, 2019
Keywords
Cylinder liners, Oil consumption, Roughness, Fractal analysis
National Category
Other Mechanical Engineering
Identifiers
urn:nbn:se:hh:diva-38859 (URN)10.1016/j.triboint.2018.11.022 (DOI)000458943500021 ()2-s2.0-85060228503 (Scopus ID)
Funder
Vinnova, 32534-1
Note

Funding: Volvo Cars in Göteborg & VINNOVA

Available from: 2019-02-07 Created: 2019-02-07 Last updated: 2025-02-14Bibliographically approved
Rebeggiani, S., Dimkovski, Z. & Rosén, B. G. (2019). Traceology for prediction of polishing roses. In: Abstracts book Met & Props 2019 LYON: . Paper presented at 22nd International Conference on Metrology and Properties of Engineering Surfaces, Lyon, France, July 2-5, 2019 (pp. 173-174).
Open this publication in new window or tab >>Traceology for prediction of polishing roses
2019 (English)In: Abstracts book Met & Props 2019 LYON, 2019, p. 173-174Conference paper, Poster (with or without abstract) (Refereed)
National Category
Production Engineering, Human Work Science and Ergonomics
Identifiers
urn:nbn:se:hh:diva-41104 (URN)
Conference
22nd International Conference on Metrology and Properties of Engineering Surfaces, Lyon, France, July 2-5, 2019
Funder
Vinnova, 2015-06889
Available from: 2019-12-04 Created: 2019-12-04 Last updated: 2021-01-27Bibliographically approved
El-Ghoul, Z.-F., John, S., Dimkovski, Z., Lööf, P.-J., Lundmark, J. & Mohlin, J. (2019). Wear analysis of pin and roller surfaces. In: 16th International Conference on Metrology and Properties of Engineering Surfaces (Met and Props 2017): . Paper presented at 16th International Conference on Metrology and Properties of Engineering Surfaces (Met and Props), JUN 26-29, 2017, Gothenburg, Sweden. Bristol, UK: Institute of Physics (IOP), Article ID 012007.
Open this publication in new window or tab >>Wear analysis of pin and roller surfaces
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2019 (English)In: 16th International Conference on Metrology and Properties of Engineering Surfaces (Met and Props 2017), Bristol, UK: Institute of Physics (IOP), 2019, article id 012007Conference paper, Published paper (Refereed)
Abstract [en]

In this paper three different combinations were evaluated: (i) steel pin vs steel roller, (ii) steel pin vs tungsten disulfide (WS2) coated roller and (iii) PVD pin vs steel roller. The aim of this paper is to properly quantify the topographical variations of the pin/roller surfaces and asses the appropriateness of the measuring technique before and after the tribological tests primarily performed for friction reduction. In-house tribometer was used to test the friction/wear performance of the three different combinations. Surface topographies were measured by white light interferometer (3D) and mechanical stylus (2D). To enable fast relocation on the stylus and interferometer, a 3D printed mask was used. Regarding the pins, Sa, Sk and Svk have been found to follow the wear changes: the lowest wear change for the combination (ii) and highest for the combination (i) but less for the combination (iii). Regarding the changes of Ra on the pin locations where edge contact occurs, the largest changes were found to be for combination (i), followed by combination (ii) and (iii). Ra and Rk change less significantly for the roller surfaces. Good correlations among the friction, initial/final roughness and radial displacements were also found.

Place, publisher, year, edition, pages
Bristol, UK: Institute of Physics (IOP), 2019
Series
Journal of Physics Conference Series, ISSN 1742-6588 ; 1183
Keywords
Tribology, friction, wear, surface topography, relocation
National Category
Other Mechanical Engineering
Identifiers
urn:nbn:se:hh:diva-41468 (URN)10.1088/1742-6596/1183/1/012007 (DOI)000487359400007 ()2-s2.0-85067786322 (Scopus ID)
Conference
16th International Conference on Metrology and Properties of Engineering Surfaces (Met and Props), JUN 26-29, 2017, Gothenburg, Sweden
Available from: 2020-01-31 Created: 2020-01-31 Last updated: 2025-02-14Bibliographically approved
Dimkovski, Z., Lööf, P.-J., Rosén, B. G. & Nilsson, P. (2018). Functional parameter screening for predicting durability of rolling sliding contacts with different surface finishes. Surface Topography: Metrology and Properties, 6(2), Article ID 024005.
Open this publication in new window or tab >>Functional parameter screening for predicting durability of rolling sliding contacts with different surface finishes
2018 (English)In: Surface Topography: Metrology and Properties, ISSN 2051-672X, Vol. 6, no 2, article id 024005Article in journal (Refereed) Published
Abstract [en]

The reliability and lifetime of machine elements such as gears and rolling bearings depend on their wear and fatigue resistance. In order to screen the wear and surface damage, three finishing processes: (i) brushing, (ii) manganese phosphating and (iii) shot peening were applied on three disc pairs and long-term tested on a twin-disc tribometer. In this paper, the elastic contact of the disc surfaces (measured after only few revolutions) was simulated and a number of functional and roughness parameters were correlated. The functional parameters consisted of subsurface stresses at different depths and a new parameter called 'pressure spikes' factor'. The new parameter is derived from the pressure distribution and takes into account the proximity and magnitude of the pressure spikes. Strong correlations were found among the pressure spikes' factor and surface peak/height parameters. The orthogonal shear stresses and Von Mises stresses at the shallowest depths under the surface have shown the highest correlations but no good correlations were found when the statistics of the whole stress fields was analyzed. The use of the new parameter offers a fast way to screen the durability of the contacting surfaces operating at similar conditions. © 2018 IOP Publishing Ltd.

Place, publisher, year, edition, pages
Bristol: Institute of Physics Publishing (IOPP), 2018
National Category
Other Mechanical Engineering
Identifiers
urn:nbn:se:hh:diva-37817 (URN)10.1088/2051-672X/aabd71 (DOI)000431455700001 ()2-s2.0-85051420390 (Scopus ID)
Funder
VINNOVA
Available from: 2018-08-29 Created: 2018-08-29 Last updated: 2025-02-14Bibliographically approved
Cabanettes, F., Chardon, G., Dumas, V., Grosjean, C., Dimkovski, Z., Rech, J. & Bertrand, P. (2018). Metal additive manufacturing: From the generation of surfaces to their functionality. In: 2018 ASPE and euspen Summer Topical Meeting Advancing Precision in Additive Manufacturing: July 22-25, 2018 : proceedings. Paper presented at 2018 ASPE and euspen Summer Topical Meeting on Advancing Precision in Additive Manufacturing, Berkeley, United States, 22-25 July, 2018 (pp. 178-182). Raleigh, NC: American Society for Precision Engineering, ASPE
Open this publication in new window or tab >>Metal additive manufacturing: From the generation of surfaces to their functionality
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2018 (English)In: 2018 ASPE and euspen Summer Topical Meeting Advancing Precision in Additive Manufacturing: July 22-25, 2018 : proceedings, Raleigh, NC: American Society for Precision Engineering, ASPE , 2018, p. 178-182Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Raleigh, NC: American Society for Precision Engineering, ASPE, 2018
National Category
Other Mechanical Engineering
Identifiers
urn:nbn:se:hh:diva-41511 (URN)2-s2.0-85060396801 (Scopus ID)9781887706766 (ISBN)
Conference
2018 ASPE and euspen Summer Topical Meeting on Advancing Precision in Additive Manufacturing, Berkeley, United States, 22-25 July, 2018
Note

Funding: LABEX MANUTECH-SISE and Institut Carnot Ingénierie@Lyon

Available from: 2020-02-03 Created: 2020-02-03 Last updated: 2025-02-14Bibliographically approved
Dimkovski, Z., Tomanik, E., Grange, S. & Epinat, F. (2018). Novel testing methods for screening the tribological performance of ring-liner surfaces. Surface Topography: Metrology and Properties, 6(3), Article ID 034017.
Open this publication in new window or tab >>Novel testing methods for screening the tribological performance of ring-liner surfaces
2018 (English)In: Surface Topography: Metrology and Properties, E-ISSN 2051-672X, Vol. 6, no 3, article id 034017Article in journal (Refereed) Published
Abstract [en]

The piston system accounts for about the half of the frictional losses of internal combustion engines and requires special testing methods to understand and improve its function. The most common way to screen the surface performance is to rub ring/liner segments against each other in a reciprocating manner. However, short reciprocating tests have intrinsic low sliding speeds, unable to reach the mixed/hydrodynamic regimes found in the engine, especially at the mid-stroke. This paper presents a rotating test for the oil control ring, which has the largest frictional losses of all other rings. Both reciprocating and rotating tests were conducted using different in-house developed modules and fixtures. Twin land oil control rings against liners with two different finishes commonly used in heavy duty diesel truck engines were tested under similar loads and speeds as in a real engine. Engine oil 5W-30 and room temperature was used for all the tests. Sliding speed, load, friction force and electrical resistance were recorded during the tests. The results show a clear discrimination of the different liner finishes depending on the lubrication regime present.

Place, publisher, year, edition, pages
Bristol: Institute of Physics Publishing (IOPP), 2018
National Category
Other Mechanical Engineering
Identifiers
urn:nbn:se:hh:diva-37819 (URN)10.1088/2051-672X/aad408 (DOI)000441147700002 ()2-s2.0-85055525411 (Scopus ID)
Available from: 2018-08-29 Created: 2018-08-29 Last updated: 2025-02-14Bibliographically approved
Cabanettes, F., Joubert, A., Chardon, G., Dumas, V., Rech, J., Grosjean, C. & Dimkovski, Z. (2018). Topography of as built surfaces generated in metal additive manufacturing: A multi scale analysis from form to roughness. Precision engineering, 52, 249-265
Open this publication in new window or tab >>Topography of as built surfaces generated in metal additive manufacturing: A multi scale analysis from form to roughness
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2018 (English)In: Precision engineering, ISSN 0141-6359, E-ISSN 1873-2372, Vol. 52, p. 249-265Article in journal (Refereed) Published
Abstract [en]

Topographies are one of the challenges for the development of the metal additive manufacturing promising technique. The article investigates multi scale topographies (from form to roughness) of as built surfaces generated by selective laser melting (SLM). Different building inclinations of samples were observed both for upskin and downskin surfaces with a wide range of measuring techniques. The two main aims are: (i) to make a critical review of measuring techniques at different scales, (ii) to enlighten the different surface generation phenomena (and the corresponding scale) occurring during additive manufacturing. The effect of heat treatment on each scale of the topography is also discussed. It is found that the focus variation technique is well suited for AM surfaces. Concerning the observation of the inclined surfaces, some parameters are emphasized as good indicators of typical signatures of AM surfaces: isotropy for the weld track component, the skewness and Rsm for the staircase effect, fractal dimension for the presence of partly melted particles. The different parameters studied helps to model and understand the different surface generation phenomena aforementioned. © 2018 Elsevier Inc.

Place, publisher, year, edition, pages
Philadelphia, PA: Elsevier, 2018
Keywords
3D topography characterization, As built surfaces, Form, Metal additive manufacturing, Multi scale measurements, Roughness, Selective laser melting, Staircase effect
National Category
Production Engineering, Human Work Science and Ergonomics
Identifiers
urn:nbn:se:hh:diva-37820 (URN)10.1016/j.precisioneng.2018.01.002 (DOI)000435620800024 ()2-s2.0-85040718309 (Scopus ID)
Available from: 2018-08-29 Created: 2018-08-29 Last updated: 2018-08-29Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0003-3149-4296

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