トルク係数のリアルタイム計測による高精度ボルト締め付け方法の提案

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タイトル別名
  • New Bolt Tightening Method with High Accuracy Utilizing Real-time Measurement of Nut Factor
  • トルク ケイスウ ノ リアルタイム ケイソク ニ ヨル コウセイド ボルト シメツケ ホウホウ ノ テイアン

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<p>  Torque control method is widely used when tightening bolt-nut connections owing to its easy operation. However, it usually involves a fair amount of scatter in bolt preloads. In contrast, elastic angle control method can provide bolt preloads with higher accuracy, though its tightening operation requires longer working hours and higher costs. In this study, a new tightening principle is proposed by combining the two methods, which achieves greater accuracy and ease of operation simultaneously. The proposed method can precisely estimate the critical value of “nut factor” in the course of tightening operations, thereby modifying the objective torque into the proper one enabling the attainment of the target bolt preload. Tightening equipment, which was manufactured for trial based on the proposed principle, successfully tightened the target bolts with scatter staying within 5% of the objective bolt preload.</p>

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