The Influence of Workpiece Hardness on Plate Temperature during One Side Lapping

Abstract:

Lapping leads to a surface with low roughness and high precision. Because of required parts accuracy tool flatness is the key to the successful machining. To avoid its excessive thermal expansion, plate temperature research was taken. The goal was to determine the correlation between the basic lapping conditions and wheel temperature. In work [1] authors developed model to estimate the maximum and average temperature rise of the work surface in lapping. According those models temperature rise depends also on workpiece and plate hardness. Because the second is constant during process, this part of research refer only to the influence of workpieces hardness. They were conducted during lapping the samples made of steel 45. To vary the hardness, samples were divide into three groups each with different Knoop hardness value: 175, 471 and 687. The different hardness values were a result of different heat treatment methods used. Every group after grinding were lapped with the same lapping conditions. In the next step the statistical analysis was conducted. It was verified if the plate temperature is influenced by the workpieces hardness. A hypotheses testing method was use. Results were calculated for temperature rise values measured after 300 minutes of machine working. According to them the influence of workpiece hardness on plate temperature is statistically insignificant.

• Periodical: Solid State Phenomena (Volume 199)
• Pages: 194-199
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.199.194
• Online since: March 2013
• Authors: Justyna Molenda, Adam Charchalis, Adam Barylski
• Keywords: Infrared Measurements, Lapping, Plate Temperature, Workpiece Hardness

References

[1] V.H. Bulsara, Y. Ahn, S. Chandrasekar, T.N. Farris, Polishing and lapping temperatures, Journal of Tribology. Vol. 119 (1997) 163-170.

DOI: 10.1115/1.2832453

[2] I.D. Marinescu, E. Uhlmann, T.K. Doi, Handbook of lapping and polishing, CRC Press, Boca Raton, London, New York, (2007).

[3] L.S. Deshpande, S. Raman, O. Sunanta, C. Agbaraji, Observations in the flat lapping of stainless steel and bronze, Wear. No. 265 (2008) 105-116.

DOI: 10.1016/j.wear.2007.09.004

[4] J. Kang, M. Hadfield, Examination of the material removal mechanisms during the lapping process of advanced ceramic rolling elements, Wear. No. 258 (2004) 2-12.

DOI: 10.1016/j.wear.2004.09.017

[5] J. Molenda, A. Barylski, Preliminary estimation of some lapping parameters influence on temperature rise of the single disc lapping machine executory system components. Journal of KONES Powertrain and Transport. Vol. 15, No. 2 (2008) 339-345.

DOI: 10.5604/12314005.1137441

[6] C. Agbaraji, S. Raman, Basic observations in the flat lapping of aluminium and steels using standard abrasives, International Journal of Advanced Manufacturing Technology. No. 44 (2009) 293-305.

DOI: 10.1007/s00170-008-1827-4

[7] J. Molenda, A. Barylski, Determining the conditions for temperature measurements during flat lapping, Journal of KONES Powertrain and Transport. Vol. 18, No. 3, 2011, 293-297.

[8] F. Klocke, Manufacturing Processes 2: Grinding, Honing, Lapping, Springer, Berlin, (2009).

[9] Information on www. lappingmachines. com.

[10] Information on www. peter-wolters. com.

[11] J. Molenda, A. Charchalis, A. Barylski, The influence of abrasive machine on temperature during one side lapping, Journal of KONES Powertrain and Transport. Vol. 17, No. 2 (2010) 357-362.

DOI: 10.5604/12314005.1137441

[12] J. Molenda, A. Barylski, Analysis of mathematical model describing a problem of temperature rise during one-sided surface lapping, Journal of KONES Powertrain and Transport, Vol. 16, No. 4 (2009) 343-350.

DOI: 10.5604/12314005.1137441