非回転切削機構を用いた曲面加工用ＣＡＭシステムの開発

DOI 機関リポジトリ HANDLE Web Site Web Site 被引用文献4件 参考文献8件

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タイトル別名
  • Development of CAM System for Non-rotating Machining of Curved Surface.
  • ヒ カイテン セッサク キコウ オ モチイタ キョクメン カコウヨウ CAM

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The multiaxis machining technology using a non-rotating cutting tool can produce a well-finished surface with little machining damage or roughness, and can be used to remove the remaining material in a concavity formed by the ball nosed end mill. This technique will extend the machining limits beyond the processing capability of the rotating tool. However, the single-blade non-rotating tool does not have a long life nor a flexibility for cutting various shapes. Therefore, a cylindrical non-rotating tool with long life and multiusability has been developed. This tool machines using a sharp blade having a wide curvature which gets shape by its inclination toward the feed direction. The cylindrical non-rotating tool can precisely machine a wide surface always with a sharp portion of the blade, because it can perform cutting at an arbitrary position on the blade due to spindle axis turn positioning. On the other hand, non-rotating machining with μm-scale cutting depth requires more precise CL data than is necessary with a rotating tool. If such CL data are generated by existing methods, a greatly increased quantity of data results, and more time is required to generate an offset surface. However, the copy simulation CAM method for multiaxis machining has been developed, which makes it possible to calculate highly precise CL data without offset processing. The imaginary stylus of this copy simulation CAM method traces on a surface of the defined shape while it self-determines the distance and course to the defined shape. Therefore, it is easy to determine the necessary tool axis vector for multiaxis machining, and the present method can generate highly precise CL data for non-rotating cutting. Results of machining experiments with this CAM method and the cylindrical non-rotating tool show that (1) it was able to get a good surface with approximate roughness of 2μmRy by smoothing machining, (2) it was able to completely removed material remaining in the concavity formed by a ball-nosed end mill, (3) the non-rotating tool and copy simulation CAM method for multiaxis machining can significantly extend the machining limits.

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