Research Papers

Effect of Thread Milling Penetration Strategies on the Dimensional Accuracy

[+] Author and Article Information
Guillaume Fromentin1

 Arts et Metiers Paris Tech, LaBoMaP, Cluny 71250, Franceguillaume.fromentin@ENSAM.EU

Vishal S. Sharma

 Arts et Metiers Paris Tech, LaBoMaP, Cluny 71250, France;sharmavs@nitj.ac.inDepartment of Industrial and Production Engineering,  National Institute of Technology, Jalandhar-144011, Indiasharmavs@nitj.ac.in

Gérard Poulachon, Yann Paire

Romain Brendlen

 Arts et Metiers Paris Tech, LaBoMaP, Cluny 71250, Franceromain.brendlen@ENSAM.EU


Corresponding author.

J. Manuf. Sci. Eng 133(4), 041014 (Aug 16, 2011) (13 pages) doi:10.1115/1.4004318 History: Received November 27, 2009; Revised May 09, 2011; Published August 16, 2011; Online August 16, 2011

Day by day the application of thread milling process is enhancing in industry because of its inherent advantages over other thread cutting techniques. The current study dwells on the interference issue, which is generated during thread milling. It was observed that there are two sources of interference on the thread produced, i.e., interference induced during mill penetration and during full machining. This interference leads to an overcut on the thread; thus, it produces a dimensionally inaccurate thread. The interference produced by penetration is much more when compared to interference generated during full machining of thread. Thus, there is a pressing need to analyze interference during penetration. So, this study evaluates different applied penetration strategies and the level of interference produced. Further, the study suggests modified penetration strategies in order to reduce the interference produced and hence create more accurate thread. This investigation is supported by analytical modeling and experimental exploration.

Copyright © 2011 by American Society of Mechanical Engineers
Topics: Thread , Errors , Milling
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Figure 1

Steps in thread milling cycle for HRP (right hand thread, down milling)

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Figure 2

Thread milling parameterization for different strategies (case F)

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Figure 3

Flow chart of the model

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Figure 4

Modeled nominal thread surface, mill envelope for FM in S2 cross-section (case A)

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Figure 5

Modeled generated thread profile for FM in S1 cross-section (case A)

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Figure 6

Z-axis component (MC3 ) of mill center trajectory (case B). (a). HRP and (b) QRP.

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Figure 7

Measured profiles and measurement of radial error in θs cross-section

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Figure 8

Modeled radial error (Er ) along lower flank for FM

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Figure 9

Radial error (Er ) along lower flank. (a) FM, HRP, MHRP and (b) FM, QRP, MQRP2 .

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Figure 10

Modeled radial error (Er ) generated by Pm3 and Pm4 points at different cross-sections: (a) HRP and (b) QRP

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Figure 11

Comparison of measured and computed radial error (Er ): (a) HRP and (b) QRP

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Figure 12

Developed mill center trajectory and its inclination angle (ψ) (Case E): (a) HRP and (b) QRP




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