| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To efficiently improve the productivity of an optical member molding mold (structure) when the mold (divided mold 19) for molding an optical member such as a Fresnel lens is manufactured by machining a mold material (workpiece material) 2 by means of a cutting tool 4 of a quadruple spindle lathe type machining device 1 provided with an X axis, a Y axis, a Z axis and a C rotation axis. <P>SOLUTION: There is provided an optical member molding mold (structure) machining method which is implemented in the following manner. Firstly, the mold material 2 is mounted on a mold material mounting portion 7 in the machining device 1, and the mold material 2 is rotated about the C axis as a rotation center 8, followed by driving the cutting tool 4 for moving in the X axis direction and the Y axis direction. Next the mold material 2 is cut by the cutting tool 4 at a required cutting speed relatively generated at a required location 20 of the mold material 2, and elliptically vibrated and machined by the cutting tool 4, to thereby form a cavity recess 17 for molding the Flesnel lens formed with an opening of a required shape and a machined surface (e.g. a concave surface) of a required shape. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
