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WORKING METHOD OF METAL MOLD FOR FRESNEL LENS, TOOL TO BE USED THEREFOR, AND METAL MOLD AND FRESNEL LENS WORKED BY THIS WORKING METHOD
WORKING METHOD OF METAL MOLD FOR FRESNEL LENS, TOOL TO BE USED THEREFOR, AND METAL MOLD AND FRESNEL LENS WORKED BY THIS WORKING METHOD
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机译:菲涅尔透镜金属模具的加工方法,所使用的工具以及该方法加工的金属模具和菲涅尔透镜
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摘要
PROBLEM TO BE SOLVED: To provide a working method of a metal mold capable of preventing lowering of tool longevity due to chipping and giving an additional value to a fresnel lens.;SOLUTION: This is the working method of the metal mold 20 for the Fresnel lens to work a fresnel molding groove 12 having wall surfaces 13, 14 respectively corresponding to a lens surface 31 and a non-lens surface 32 of the Fresnel lens 30 into a metal mold original board, wherein one crest line 5 continued to a knife edge 4 is formed as a cutting blade, and a tool 1 with a cutout part 7 connecting the one crest line 5 and the other crest line 6 to each other formed on it is used for the knife edge 4. The tool 1 is delivered to the metal mold original board 10 with the cutting blade 5 on its head so that the wall surface 14 corresponding to the non-lens surface of the fresnel molding groove 12 is gradually cut from it supper end by the cutout part 7 while giving relative rotating motion around a central line AX of the metal mold between the tool 1 and the metal mold original board 10. An irregular cutting mark 15 is formed by the cutout part 7 on the wall surface 14 corresponding to the non-lens surface.;COPYRIGHT: (C)2002,JPO
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