3+2軸制御加工における加工可能範囲のグラフィックスデバイスを用いた高速な導出法

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書誌事項

タイトル別名
  • Fast Estimation Method of Machinable Area of Workpiece Surface for 3+2 Axis Control Machining using Graphics Device
  • 3+2軸制御加工における加工可能範囲のグラフィックスデバイスを用いた高速な導出法 : 加工可能範囲および必要突き出し長さ分布のテクスチャ投影を用いた可視化
  • 3+2ジク セイギョ カコウ ニ オケル カコウ カノウ ハンイ ノ グラフィックスデバイス オ モチイタ コウソク ナ ドウシュツホウ : カコウ カノウ ハンイ オヨビ ヒツヨウ ツキダシ ナガサ ブンプ ノ テクスチャ トウエイ オ モチイタ カシカ
  • —Visualization Algorithm of Machinable Area and Minimum Shank Length with Texture Projection Technique—
  • —加工可能範囲および必要突き出し長さ分布のテクスチャ投影を用いた可視化—

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抄録

This study proposes a new estimation method for tool posture in 3+2 axis control machining process. The proposed method focuses on two different properties of workpiece surface, machinable area and minimum shank length. Distribution of these properties on workpiece surface is determined by the tool posture, workpiece shape, and shape of cutting tool. In planning process of 3+2 axis control machining, CAM and CAPP operators often determine combination of tool posture and tooling conditions through trial and error. In such planning process, fast visualization method of these properties on workpiece surface is strongly required to realize CAM and CAPP systems with an interactive interface. Then, this study proposes fast estimation method to visualize both the machinable area and distribution of the minimum shank length as a color image for each tool posture candidate. In order to reduce calculation time of the proposed methods, graphics devices known as Graphics Processing Unit (GPU) is introduced. In the proposed algorithm to adapt several features on GPU hardware, offset shape of workpiece surface is generated from depth information in rendering 3D-CG. Furthermore, unmachinable area is estimated by inverse-offset operation and shadow mapping function in 3D-CG techniques. In the visualization phase of required shank length on workpiece surface, a color image is generated from the depth information. Then, the color image is projected on workpiece shape with the texture projection technique. Because almost calculation processes can be executed inside of GPU hardware, the developed prototype system can visualize both the unmachinable area and distribution of minimum shank length within several dozen milliseconds for each tool posture candidate.

収録刊行物

  • 精密工学会誌

    精密工学会誌 79 (2), 182-186, 2013

    公益社団法人 精密工学会

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