A slip-line field model is presented for the determination of the chip curl radius when cutting with a grooved restricted contact tool. The calculated values are found to provide a good approximation, especially for larger uncut chip thicknesses. The calculated results are consistently lower than the measured ones due to the elastic recovery of the chip after leaving the groove.

Issue Section:
Technical Papers
Topics:
Approximation, Cutting
1.
Chao
B. T.
, and
Trigger
K. J.
,
1959
, “
Controlled Contact Cutting Tools
,”
Transactions of the ASME
, Vol.
81
, pp.
139
–
151
.
2.
Chiffre
L. De.
,
1982
, “
Cutting Tools with Restricted Contact
,”
Int. J. Mach. Tool. Des. Res.
, Vol.
22
, pp.
321
–
332
.
3.
Jawahir
I. S.
,
1988
, “
The Tool Restricted Contact Effect as a Major Influence Factor in Chip Breaking: An Experimental Analysis
,”
Annals of the CIRP
, Vol.
37
, No.
1
, pp.
121
–
126
.
4.
Jawahir
I. S.
,
1990
, “
On the Controllability of Chip Breaking Cycles and Modes of Chip Breaking in Metal Machining
,”
Annals of the CIRP
, Vol.
39
, No.
1
, pp.
47
–
51
.
5.
Klopstock
H.
,
1925
, “
Recent Investigation in Turning and Planning and a New Form of Cutting Tool
,”
Transactions of the ASME
, Vol.
47
, pp.
345
–
377
.
6.
Lee
E. H.
, and
Shaffer
B. W.
,
1951
, “
The Theory of Plasticity Applied to a Problem of Machining
,”
ASME Journal of Applied Mechanics
, Vol.
18
, pp.
405
–
413
.
7.
Liu, X. D., 1989, Ph.D. Thesis, “Study on the Mechanism of Metal Cutting with RC Tools and its Applications,” South China University of Technology.
8.
Lo
S. Y.
,
Lode
U.
, and
Armarego
E. J.
,
1966
, “
Experiments with Controlled Contact Tools
,”
Int. J. Mach. Tool Des. Res.
, Vol.
6
, pp.
115
–
127
.
9.
Rotberg
J.
, and
Ber
A.
,
1991
, “
Chip Control in Cut-off Tools
,”
Annals of the CIRP
, Vol.
40
, No.
1
, pp.
73
–
77
.
10.
Oxley
P. L. B.
, and
Hastings
W. F.
,
1977
, “
Predicting the Strain Rate in the Zone of Intense Shear in which the Chip is Formed in Machining from the Dynamic Flow Stress Properties of the Work Material and Cutting Conditions
,”
Proc. R. Soc., Lond. A
, Vol.
356
, No.
1686
, pp.
395
–
410
.
11.
Shi
T.
, and
Ramalingam
S.
,
1993
, “
Modeling Chip Formation with Grooved Tools
,”
Int. J. Mech. Sci.
, Vol.
35
, No.
9
, pp.
741
–
756
.
12.
Takeyama, H., Seckiguchi, H., and Takada, K., 1963, Seimitsu Kikai, No. 36, pp. 150–156.
13.
Usui
E.
,
Kikuchi
K.
, and
Hoshi
K.
,
1964
, “
The Theory of Plasticity Applied to Machining with Cut-away Tools
,”
ASME JOURNAL OF ENGINEERING FOR INDUSTRY
, Vol.
86
, pp.
95
–
104
.
14.
Worthington
B.
, and
Redford
A. H.
,
1973
,
Int. J. Mach. Tool Des. Res.
, Vol.
13
, pp.
257
–
270
.
15.
Worthington
B.
,
1975
, “
The Effect of Rake Face Configuration on the Curvature of the Chip in Metal Cutting
,”
Int. J. Mach. Tool Des. Res.
, Vol.
15
, pp.
223
–
239
.
16.
Worthington
B.
, and
Rahman
M. H.
,
1979
, “
Predicting Breaking with Grooved Type Breakers
,”
Int. J. Mach. Tool Des. Res.
, Vol.
19
, pp.
121
–
132
.
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