A modified offset cutter path strategy for high-speed rough milling hardened steel

Abstract

Previous work has shown that the use of an offset cutter path strategy when high-speed rough milling hardened steel using an axial depth of 15 mm resulted in the lowest tool life as compared to the use of raster and single-direction raster strategies [1]. The paper describes a novel approach on improving the offset cutter path strategy by selecting the proper entrance and exit conditions in order to improve the volume of metal removed and tool life. The effects of an offset strategy and a modified offset strategy are investigated in terms of the tool life, tool wear and cutting force signatures generated. It was found that the modified offset strategy showed a near four-fold increase in tool life. This was mainly attributed to the avoidance of cutter in-feed that occurred in the middle of the workpiece.

Keywords

cutter path tool life tool wear offset high-speed rough milling hardened steel

References

Toh

C. K.

Evaluation of cutter path strategies and orientations when high speed milling hardened AISI H13 steel. PhD thesis, University of Birmingham, 2003.

Prabhu

P. V.

Gramopadhye

A. K.

Wang

H. P.

A general mathematical model for optimising NC tool path for face milling of flat convex polygonal surfaces. Int. J. Prod. Res., 1990, 28(1), 101–130.

Suh

Y. S.

Lee

K. W.

NC milling tool path generation for arbitrary pockets defined by sculptured surfaces. Computer Aided Des., 1990, 22(5), 273–284.

Hinduja

Roaydi

Philimis

Barrow

Determination of optimum cutter diameter for machining 2.5D pockets. Int. J. Mach. Tools Mf., 2001, 41(5), 687–702.

Veeramani

Gau

Y. S.

Selection of an optimal set of cutting tool sizes for 2.5D pocket machining. Computer Aided Des., 1997, 29(12), 869–877.

Vickers

G. W.

Ding

Automated rough machining of curved surfaces. In Proceedings of the CSME Forum SCGM 1992, Montreal, Quebec, Canada, 1992, Vol. 2, pp. 593–597.

Dong

Vickers

G. W.

Optimal tool path pattern identification for single island, sculptured part rough machining using fuzzy pattern analysis. Computer Aided Des., 1994, 26(11), 787–795.

Kline

W. A.

DeVor

R. E.

Lindberg

J. R.

The prediction of cutting forces in end milling with application to cornering cuts. Int. J. Mach. Tools Mf., 1982, 22(1), 7–22.

Kloypayan

Lee

Y. S.

Material engagement analysis of different end mills for adaptive control in milling processes. Computers in Industry, 2002, 47(1), 55–76.

10.

ISO 8688-2 Tool Life Testing in Machining—Part 2, 1989 (International Standardization Organization).

11.

Chou

Y. K.

Evans

C. J.

Cubic boron nitride tool wear in interrupted hard cutting. Wear, 1999, 225-229, Part 1, 234–245.

12.

Trent

E. M.

Metal Cutting, 3rd edition, 1991 (Butter-worths, London and Boston).

13.

Oishi

Built-up edge elimination in mirror cutting of hardened steel. Trans. ASME, J. Engng for Industry, 1995, 117(1), 62–66.