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IJAT Vol.17 No.5 pp. 477-485
doi: 10.20965/ijat.2023.p0477
(2023)

Research Paper:

Feasibility of 8-Shaped Motion Test for Five-Axis Machining Center

Yukitoshi Ihara*,†, Souma Kajino**, and Yuto Inoue**

*Department of Mechanical Engineering, Osaka Institute of Technology
5-16-1 Omiya, Asahi-ku, Osaka 535-8585, Japan

Corresponding author

**Graduate Course in Electrical, Electronic and Mechanical Engineering, Osaka Institute of Technology
Osaka, Japan

Received:
February 28, 2023
Accepted:
April 18, 2023
Published:
September 5, 2023
Keywords:
motion accuracy, test standard, five-axis machining center, interpolation
Abstract

ISO 10791-7, which specifies the machining accuracy test standard for machining centers, and ISO 10791-6, which specifies the interpolation motion test standard, were revised in 2014 to include five-axis machining centers (5-axis MCs). In addition, cone frustum test, which has been used as the National Aerospace Standard (NAS), was revised and introduced in these ISO standards. However, prior to the establishment of these standards, an aircraft manufacturing company in China proposed S-shaped machining test to measure the accuracy of the test piece of an aircraft. This was adopted as an informative annex of ISO 10791-7 in 2020. Furthermore, in 2019, China proposed a method related to S-shaped machining test and a method of 8-shaped interpolation motion test. Since the S-shaped test requires high acceleration and deceleration in some sections, the test results depend on the performance of the computer-aided manufacturing (CAM) software; therefore, it is not efficient in determining the accuracy of the machine tools. In contrast, in the 8-shaped motion test, the tip of the spindle moves based on a sine curve; consequently, high acceleration/deceleration does not occur. Since the tip of the cutting tool is fixed, a device called R-test is used to measure the position of the center of reference ball using three displacement sensors. In this study, we have discussed the feasibility and problems of the 8-shaped motion test. First, the motion of the machine in the figure “8” motion test is clarified. Next, the definition of the parameters necessary to create the NC programs is outlined. In addition, we have proposed a method in which suitable conditions are set for simultaneous 5-axis feed on a 5-axis MC. Finally, the results of an actual test are applied to the 5-axis MC to confirm that no major problems exist.

Cite this article as:
Y. Ihara, S. Kajino, and Y. Inoue, “Feasibility of 8-Shaped Motion Test for Five-Axis Machining Center,” Int. J. Automation Technol., Vol.17 No.5, pp. 477-485, 2023.
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Last updated on Mar. 04, 2024