Development of Ultraprecision Machining Center with Closed-Loop Structure and Its Control

High stiffness is required to reduce the relative displacement between workpiece and cutting tool due to the cutting force, even for ultraprecision machine tools. From the viewpoint of the structure with high stiffness, a gate-type structure is desirable. However, it is in general difficult to const...

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Bibliographic Details
Published inTransactions of the Japan Society of Mechanical Engineers Series C Vol. 61; no. 585; pp. 2121 - 2127
Main Authors Sawada, Kiyoshi, Imai, Keisuke, Takeuchi, Yoshimi, Sata, Toshio
Format Journal Article
LanguageJapanese
Published The Japan Society of Mechanical Engineers 25.05.1995
Subjects
Closed-Loop Structure
Constraint Axis
High Stiffness
Ultraprecision Machining Center
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Summary:High stiffness is required to reduce the relative displacement between workpiece and cutting tool due to the cutting force, even for ultraprecision machine tools. From the viewpoint of the structure with high stiffness, a gate-type structure is desirable. However, it is in general difficult to construct, and is liable to have a large size. In terms of ease of construction, a lathe-type ultraprecision milling machine has already been made, together with a pseudo ball endmill of single-crystal diamond as a cutting tool. The study deals with the further improvement of stiffness by upgrading the lathe-type ultraprecision milling machine to that with a closed-loop structure. Thus, two constraint axes are employed to form the closed-loop structure, and are able to move in cooperation with x-and z-axis movements using the newly developed control software. The effect of the closed-loop structure is experimentally confirmed as well as in FEM analysis.
ISSN:0387-5024
1884-8354
DOI:10.1299/kikaic.61.2121