Simulative Testing of Friction and Lubrication in Cold Forging of Steel and Aluminum

Publication: ResearchConference article – Annual report year: 2012

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A new, simulative test of friction and lubrication in cold forging is developed by the authors. The test is based on a backward can extrusion process in which the workpiece rotates relatively to the conical punch. An analytical model is presented determining the friction stress from the measured torque during testing combined with an analysis of the sliding velocity distribution along the punch nose. The latter is determined by FE analysis of the test. Results show friction stress for unalloyed low C-steel provided with different types of lubricants, i.e. phosphate coating plus soap, phosphate coating plus MoS2 and single bathe lubrication with PULS and aluminum provided with 6 different lubricant systems. The new test is so severe, that it is possible to break down the best lubrication systems for cold forging of steel and aluminum.
Original languageEnglish
JournalTransactions of the North American Manufacturing Research Conference. Proceedings
Publication date2012
Volume40
Pages287-296
ISSN1047-3025
StatePublished

Conference

ConferenceNAMRC 40 - North American Manufacturing Research Conference
CountryUnited States
CityNotre Dame, Ind.
Period04/06/1208/06/12
Internet addresshttp://www.nd.edu/~namrcxl/Welcome.html

Keywords

  • Cold forging, Friction, Limits of lubrication, Backward can extrusion
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