Masters Theses

Keywords and Phrases

Bull-nose helical endmilling; Cryogenic machining (LN2); Cutting force components; Inconel 718; Minimum quantity lubrication (MQL); Specific force coefficients

Abstract

“This thesis presents the results of experimental investigations of the mechanistic identification of specific force coefficients for uncoated bull-nose and uncoated wavy-edge/bull-nose helical endmilling of Inconel 718 under emulsion, minimum quantity lubrication (MQL), cryogenic (LN2), and combined (MQL + LN2) cooling. Several slot milling tests were conducted on Inconel 718 workpiece block with depth of cut 1.25 mm. The cutting parameters were varied as: spindle speed, n = 250 and 750 rev/min, feedrate, f = 25–75 mm/min by using uncoated carbide bull-nose helical endmill. Also 24 peripheral milling tests were conducted on Inconel 718 workpiece block with axial depth of cut 18.75 mm and radial depth of cut 1.75 mm. The cutting parameters were varied as: spindle speed, n = 62 and 93 rev/min, feedrate, f = 27.9–55.8 mm/min by using uncoated cobalt wavy-edge/bull-nose helical endmill. Cutting force components and specific force coefficients have been experimentally determined to compare the effects of different cooling methods. Eventually, six specific cutting and edge force coefficients (Ktc, Krc, Kac, Kte, Kre, Kae) have been determined for uncoated bull- nose and uncoated wavy-edge/bull-nose helical endmilling of Inconel 718 workpiece under the four cooling methods (Emulsion, MQL, LN2, and combined (MQL+LN2)), thus a new database that hitherto does not exist in published literature has been created to be used for accurate prediction of cutting forces under typical industrial machining conditions”--Abstract, page iv.

Advisor(s)

Okafor, A. Chukwujekwu (Anthony Chukwujekwu)

Committee Member(s)

Chandrashekhara, K.
Samaranayake, V. A.

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Mechanical Engineering

Publisher

Missouri University of Science and Technology

Publication Date

Fall 2014

Journal article titles appearing in thesis/dissertation

  • Mechanistic identification of specific force coefficients for uncoated carbide ball-nose helical endmilling of Inconel 718 under emulsion, MQL, LN₂, and MQL+LN₂ cooling strategies
  • Mechanistic identification of specific force coefficients for wavy-edge/bull-nose helical endmilling of Inconel 718 under emulsion, MQL, LN₂, and MQL+LN₂ cooling strategies

Pagination

xi, 95 pages

Note about bibliography

Includes bibliographic references.

Rights

© 2014 Mahmood Shaman Ameen, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 11998

Electronic OCLC #

1313117306

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