Evaluation of local axial strain in deformed shafts using optical 3D scanning
| Reference No. | 2025a029 |
|---|---|
| Type/Category | Grant for General Research- Short-term Visiting Researcher |
| Title of Research Project | Evaluation of local axial strain in deformed shafts using optical 3D scanning |
| Principal Investigator | Takenori Sumi（Asahi Heat Treatment Co.,Ltd.・Individual contributor） |
| Research Period |
April 1,2025. -
April 3,2025. September 29,2025. - October 2,2025. March 27,2026. - March 31,2026. |
| Keyword(s) of Research Fields | point cloud, space curve, curve theory, differential geometry, curvature |
| Abstract for Research Report |
This study aims to evaluate local axial strain in deformed shafts using an optical 3D measurement system (3D sensor). Shafts are among the most fundamental mechanical components, functioning as power transmission elements through rotational motion. In shaft manufacturing, maintaining a straight axis is a critical requirement, as it ensures rotational stability. Conventionally, axial deformation is assessed using geometrical tolerances, particularly straightness. However, by utilizing the detailed geometric data captured by 3D sensors, it is possible to explore more localized evaluation indices, which may contribute to developing more precise criteria for shaft performance. Among various processes involved in shaft manufacturing, heat treatment is indispensable. However, it can unintentionally introduce axial strain, which is often difficult to predict during the design phase. Therefore, investigating localized axial strain induced by heat treatment—beyond conventional geometrical tolerance—has the potential to achieve the following: 1. Refinement of shaft quality assessment metrics 2. Advancement of evaluation standards for heat treatment processes 3. Initiation of data foundations for machine learning-based evaluation of thermally induced strain The expected outcome of this study is the identification of complementary local axial strain indicators, in addition to the conventional global straightness metric, both derived from point cloud data obtained through optical 3D scanning. |
| Organizing Committee Members (Workshop) Participants (Short-term Joint Usage) |
Takenori Sumi（Asahi Heat Treatment Co.,Ltd.・Individual contributor） |