| 号数 | ばね論文集３０号（１９８５年） |
| ページ数 | pp.150-168 |
| 種類 | 共同研究報告 |
| 論文名 | 熱間成形コイルばねのへたり試験法に関する研究 |
| Title | Study on Sag Test of Hot Coiled Compressive Spring for Suspension |
| 著者 | 熱間成形コイルばねへたり試験法委員会 |
| Author | The committee of for Sag Test of Hot Coiled Compressive Spring |
| 抄録 | コイルばねのへたり試験法であるクリープ試験、締付試験の試験方法、条件は一定していない。その共通化をはかるためのステップとしてへたり試験の共同実験を行い次の結果を得た。へたり測定は常用点の試験前後の変化を測定するのが良い。試験時間は96hrが適切である。試験温度のへたりへの影響、両試験のへたりの相関を把握した。 耐へたり性を評価できる材料独自の試験法の開発が望まれているので3方法を調査した。それらはねじりクリープ法、ねじりリラクセーション法，、ヒステリシスループ法であるが、ねじりクリープ法が精度も良く、ばねのへたりとも対応づけが可能である |
| Abstract | The sag of coil spring has usually been estimated by creep test or relaxation test.
However, the condition of those tests are not standardized. The aim of this paper is to present the experimental results which could give some assistance for standardizing the method of sag test. It was realized that the measurement of sag should be made at normal load of coil spring and the appropriate time of test was 96 hours. Experiments were also carried out about the influence of temperature and the correlation between the sag of coil spring and that of those tests. For estimating the sag resistance of material, three testing methods, which are torsional-creep method, torsional-relaxation method, and hysteresis loop method, were compared. The conclusion in that the torsional-creep method have been reasonable accuracy, and good correlation with the sag of coil spring. |
| 著者の所属 | 熱間成形コイルばねへたり試験法委員会 |
| Belonging | The committee of for Sag Test of Hot Coiled Compressive Spring |
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