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IJAT Vol.1 No.2 pp. 120-127
doi: 10.20965/ijat.2007.p0120
(2007)

Paper:

Tilted Tool Axis Machining on 5-Axis Machine Tools

Makoto Yamada*, Tsukasa Kondo*, Fumiki Tanaka**, and Takeshi Kishinami***

*Hakodate National College of Technology
Tokura-cho 14-1, Hakodate-shi, Hokkaido 042-8501, Japan

**Graduate School of Information Science and Technology, Hokkaido University
Kita-14 Nishi-9, Kita-ku Sapporo, Hokkaido 060-0814, Japan

***Kushiro National College of Technology
Otanoshike Nishi 2-32-1, Kushiro, Hokkaido 084-0916, Japan

Received:
September 13, 2007
Accepted:
October 18, 2007
Published:
November 5, 2007
Keywords:
5-axis machine tool, tilted tool axis machining, mold and die machining, indexing angle, inverse offset method
Abstract

High-efficiency machining and high-quality cutting are required in mold and die machining. To produce high-quality molds and dies, we require high rigidity for cutting tools and machining with effective cutting edges. We propose tilted tool axis machining, which involves indexing using 2-axis rotary motion and machining using 3-axis feed motion on a 5-axis machining center. To conduct tilted tool axis machining by ball end mill, we must know the tool attitude to ensure stable cutting and how to control the tool attitude to stable cutting conditions. Our main objective was to clarify the tool attitude ensuring stable cutting conditions and to develop automatic determination of the indexing angle for mold and die machining. We start by discussing machining experiments using a dynamic force dynamometer on a 5-axis machining center to analyze machining features using a tilted tool axis ball end cutting tool. We then determine machining evaluation from which the results of machining experiments are determine using a tilted tool axis ball end cutting tool. We propose calculation of optimum indexing angle candidates for machining surfaces using normal vectors of surfaces and cutting edges. We then show machinable area evaluation for the calculated indexing angle based on inverse offset method with a state flag. We then give examples demonstrating the effectiveness of our proposal.

Cite this article as:
Makoto Yamada, Tsukasa Kondo, Fumiki Tanaka, and Takeshi Kishinami, “Tilted Tool Axis Machining on 5-Axis Machine Tools,” Int. J. Automation Technol., Vol.1, No.2, pp. 120-127, 2007.
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