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Lubrication

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Series: ASM Technical Books
Publisher: ASM International
Published: 30 September 2023
DOI: 10.31399/asm.tb.stmflw.t59390064
EISBN: 978-1-62708-459-8
... Abstract This chapter reviews the basic theory of lubrication in the context of metal forming applications. It discusses the rheological properties of fluids and their effect on fluid-film thickness at pressures, temperatures, and loading conditions typical of metal working processes...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 September 2023
DOI: 10.31399/asm.tb.stmflw.9781627084598
EISBN: 978-1-62708-459-8
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040067
EISBN: 978-1-62708-300-3
... Abstract This chapter discusses the effect of friction and lubrication on forgings and forging operations. The discussion covers lubrication mechanisms, the use of friction laws, tooling and process parameters, and the lubrication requirements of specific materials and forging processes...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400089
EISBN: 978-1-62708-316-4
... Abstract This chapter discusses the factors that must be considered when selecting a lubricant for sheet metal forming operations. It begins with a review of lubrication regimes and friction models. It then describes the selection and use of sheet metal forming lubricants, explaining how...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250019
EISBN: 978-1-62708-345-4
... Abstract This chapter reviews the knowledge of the field of gear tribology and is intended for both gear designers and gear operators. Gear tooth failure modes are discussed with emphasis on lubrication-related failures. The chapter is concerned with gear tooth failures that are influenced...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 September 2023
DOI: 10.31399/asm.tb.stmflw.t59390100
EISBN: 978-1-62708-459-8
... Abstract This chapter describes the properties and attributes of various classes of metalworking lubricants, including mineral oils; natural oils, fats, derivatives, and soaps; synthetic fluids (olefins, esters, polyglycols, ionic liquids); compounded lubricants (oils, greases, fats); aqueous...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300391
EISBN: 978-1-62708-323-2
... Abstract This chapter covers the tribological properties of different types of oil, greases, solid lubricants, and metalworking and traction fluids. It explains how lubricants are made, how they work, and how they are applied and tested. It also discusses the fundamentals of lubrication...
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Published: 30 September 2023
Figure 5.6: A Stribeck curve, illustrating the regimes of lubrication. See also Fig. 4.2 . More
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Published: 30 September 2023
Figure 5.7: Regimes of lubrication. (a) Boundary; (b) mixed; (c) hydrodynamic. More
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Published: 30 September 2023
Figure 5.10: Lubrication of a steel surface by sulfur, where sulfide layers act as a boundary lubricant. More
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Published: 30 September 2023
Figure 5.18: Hydrodynamic lubrication, illustrating (a) fluid flow velocity profile between two parallel plates, with the top plate moving with velocity u relative to the top plate; (b) squeeze film produced by approaching surfaces; (c) externally applied pressure, or hydrostatic lubrication More
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Published: 30 September 2023
Figure 5.24: Factors promoting plastohydrodynamic lubrication. (a) workpiece deformation; (b) externally applied pressure; (c) elastic deformation of tooling; (d) transport by workpiece surface. More
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Published: 30 September 2023
Figure 9.18: Pressure or nozzle die for promoting hydrodynamic lubrication with soaps. More
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Published: 30 September 2023
Figure 9.19: Multiple die for promoting hydrodynamic lubrication. The lubricant has been eliminated for clarity; note the high pressure chambers to promote workpiece ductility and improved lubrication. More
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Published: 30 September 2023
Figure 9.23: Construction for hydrostatic lubrication of both external and internal tube surfaces in drawing on a plug. More
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Published: 30 September 2023
Figure 10.19: Film thickness entrained in hydrostatic lubrication of 2011-T3 aluminum, using caster oil, and a 22° die angle [ 195 ]. More
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Published: 30 September 2023
Figure 11.2: Effects of atmosphere and lubrication on end-face expansion in hot upsetting of type 1045 steel cylinders (press speed, 0.76 m/min). More
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Published: 30 September 2023
Figure 11.4: Means of promoting fluid-film lubrication in upsetting. (a) Producing grooves to entrap lubricant; (b) use of a rimmed specimen; (c) conical impression. More
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Published: 30 September 2023
Figure 11.32: Effects of lubrication on (a) punch wear and (b) bore finish in back extrusion of steel cans. More
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Published: 30 September 2023
Figure 12.9: Effects of strain hardening exponent and lubrication on dome height in the LDH test. More