成果報告書詳細
管理番号20150000000417
タイトル*平成26年度中間年報 SIP(戦略的イノベーション創造プログラム) 革新的設計生産技術 CAMーCNC統合による革新的な工作機械の知能化と機械加工技術の高度化
公開日2015/7/18
報告書年度2014 - 2014
委託先名国立大学法人神戸大学 ソフトキューブ株式会社 キタムラ機械株式会社
プロジェクト番号P14030
部署名ロボット・機械システム部
和文要約
英文要約Title: “Innovative design and production technologies” in the Strategic Innovation Promotion (SIP) program / Development of Innovative Intelligent Machine Tool by CAM-CNC integration (FY2014-FY2015) FY2014 Annual Report

An intelligent machine tool is not realized under the existing method in which machining operation is instructed by a part program or an NC program. Therefore, a new methodology to generate instruction commands for prompt machine control instead of preparing NC programs is developed to realize an innovative intelligent machine tool. This machine tool can contribute to achieve needless of NC program preparation, control of cutting process, shortening of production lead time, and realization of autonomous distributed factory. Shortening of production lead time is effective to realize tailor-made production of dies, molds and artificial bones.

Research and development results in FY2014 are summarized as follows:

a. Tool motion control by referring to Voxel model of removal volume was achieved. In this method, feed speed of a cutting tool is controlled by referring feed speed parameters stored in Voxel properties of removal volume Voxel model. It is assumed that these parameters change gradually as a diffusion phenomenon to determine Voxel properties automatically using diffusion equation. Feed speed parameters were determined reasonable and feed speed a cutting tool can be controlled successfully.

b. A milling force simulator using Voxel model of removal volume was developed. In this milling force simulator, a new methodology to calculate uncut chip thickness by referring Voxel model of workpiece is applied. A conventional instantaneous rigid force model is effective, but it is difficult to apply for the case in which uncut chip thickness changes non-uniform. The performance of the proposed milling force simulator is verified through the experimental end-milling operation which realized complex change of workpiece shape.

c. Integration of the process planning system and the digital copy milling system was performed. The process planning system determines the machining area, the cutting tool, and the cutting conditions for the end-milling operation. The digital copy milling system had been developed at Kobe University, and this system generates tool paths based on the copy milling principle for prompt machining control.

d. A new GUI (graphical user interface) for an intelligent machine tool was developed. The developed GUI achieved easy selection of 3D CAD models of a product and a workpiece, and simple definition of machining parameters before the end-milling operation. Intuitive operation using touch panel is effective to realize easy operation of an intelligent machine tool.

e. A prototype model of an innovative intelligent machine tool was manufactured. The developed test programs mentioned in c. and d. were installed in the original open-architecture CNC developed by Kitamura machinery Co. Ltd.

f. Cutting experiments using the prototype model of an innovative intelligent machine tool was performed. In those experiments, it was no need to prepare NC program. In one example, about 60 minutes shortening of production lead time was achieved.
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