A Numerical Method for Determining Temperature Distributions in Machining with Coolant: Part 2: Calculation Method and Results

Abstract

A computational method is developed for determining temperature distributions in machining with coolant. Models for heat sources and equations for heat-transfer coefficients used in the calculations were presented in Part 1. In Part 2 the finite element method is applied to solve the steady two-dimensional energy equation with a coolant used on the boundaries. Using this method temperature distributions throughout the tool, work and chip in machining with coolant are calculated, given the experimental values of the cutting forces and chip thickness, the thermal properties of the work and tool materials and the heat-transfer coefficients at the boundaries. The calculated tool temperatures are compared to results measured experimentally and satisfactory agreement is shown.

References

Smart

E. F.

Trent

E. M.

Coolants and cutting tool temperatures. Proceedings of Fifteenth International Machine Tool Design Research Conference, 1974, pp. 187–195.

Childs

T. H. C.

Mahdi

M. I.

On the stress distribution between the chip and tool during metal turning. Ann. CIRP, 1989, 38, 55–58.

Harris

A. G.

An investigation to derive a method of predicting the contribution of tool flank wear to tool forces in orthogonal machining. University of NSW report 1981/IE/, 1981.

Tay

A. O.

Stevenson

M. G.

de Vahl Davis

Using the finite element method to determine temperature distributions in orthogonal machining. Proc. Instn Mech. Engrs, 1974, 188, 627–638.

Tay

A. O.

Stevenson

M. G.

de Vahl Davis

Oxley

P. L. B.

A numerical method for calculating temperature distributions in machining, from force and shear angle measurements. Int. J. Mach. Tool Des. Res., 1976, 16, 335–349.

Hiroaka

Tanaka

A variational principle for transport phenomena. Memoir, Faculty of Engineering, Kyoto University, 1968 (Pt 3), pp. 235–263.

A computer-based numerical study of the role of cooling in machining. PhD thesis, University of New South Wales, 1991.

Manyindo

B. M.

An experimental and theoretical investigation of forces and chip geometry as a basis of machinability assessment when machining various materials. PhD thesis, University of New South Wales, 1984.

Woolmen

Mottram

R. A.

The mechanical and physical properties of the British Standard EN steels. BASRA 2, 1966.

10.

Holman

J. P.

Heat transfer, 1986 (McGraw-Hill, New York).

11.

Oxley

P. L. B.

Mechanics of machining—an analytical approach to assessing machinability, 1989 (Ellis Horwood, Chichester).

12.

Smith

A. J. R.

Armarego

E. J. A.

A computer-based prediction of orthogonal cutting temperatures. Fourth International Conference on Manufacturing engineering, Brisbane, 11–13 May 1988, pp. 146–151.