Modeling the Static and Dynamic Behaviors of a Large Heavy-Duty Lathe Machine under Rated Loads
The static and dynamic performances of a machine tool structure are considered to constitute the primary factors affecting the load-carrying capacity, geometric accuracy and surface precision of the workpiece. The machining performance of a large machine tool under stable conditions is effectively d...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-11-01
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| Series: | Computation |
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| Online Access: | https://www.mdpi.com/2079-3197/10/12/207 |
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| author | Chien-Yu Lin Yuan-Ping Luh Wei-Zhu Lin Bo-Chen Lin Jui-Pin Hung |
| author_facet | Chien-Yu Lin Yuan-Ping Luh Wei-Zhu Lin Bo-Chen Lin Jui-Pin Hung |
| author_sort | Chien-Yu Lin |
| collection | DOAJ |
| description | The static and dynamic performances of a machine tool structure are considered to constitute the primary factors affecting the load-carrying capacity, geometric accuracy and surface precision of the workpiece. The machining performance of a large machine tool under stable conditions is effectively determined by its dynamic response to the cutting force at low-frequency excitation. This study, therefore, investigated the static and dynamic characteristics of a large heavy-duty lathe machine tool in which the headstock and tailstock comprised critical component modules supporting a large workpiece during low-speed machining. Using a finite element model, the influences of the structural modules on the static and dynamic characteristics of the lathe were analyzed, considering the effects of the workpiece load. The results indicated that the fundamental vibration modes of the lathe were primarily dominated by headstock, tailstock, and workpiece behaviors. The maximum compliances of the lathe under the rated load were found to occur at relatively low frequencies (22, 40.7, and 82.7 Hz) and increase with the reduction in workpiece weight. Notably, these modal frequencies were significantly higher than the maximum rotational speed of the spindle (450 rpm). In addition, the dynamic rigidity corresponding to the rated speed was higher than that induced at the natural frequency. These results indicate that the subject lathe possesses sufficient capacity to sustain the cutting load during stable turning machining. This study can, therefore, help designers improve the performance of machine tools for future fabrication. |
| first_indexed | 2024-03-09T17:10:38Z |
| format | Article |
| id | doaj.art-bb4817c6a70a458fae33ce77828de2d7 |
| institution | Directory Open Access Journal |
| issn | 2079-3197 |
| language | English |
| last_indexed | 2024-03-09T17:10:38Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Computation |
| spelling | doaj.art-bb4817c6a70a458fae33ce77828de2d72023-11-24T14:07:00ZengMDPI AGComputation2079-31972022-11-01101220710.3390/computation10120207Modeling the Static and Dynamic Behaviors of a Large Heavy-Duty Lathe Machine under Rated LoadsChien-Yu Lin0Yuan-Ping Luh1Wei-Zhu Lin2Bo-Chen Lin3Jui-Pin Hung4Department of Research and Development, L&L Machinery Industry Co., Ltd., Taichung 41154, TaiwanGraduate Institute of Manufacturing Technology, National Taipei University of Technology, Taipei 10608, TaiwanDepartment of Mechanical Engineering, National Chin-Yi University of Technology, Taichung 41170, TaiwanDepartment of Research and Development, L&L Machinery Industry Co., Ltd., Taichung 41154, TaiwanGraduate Institute of Precision Manufacturing, National Chin-Yi University of Technology, Taichung 41170, TaiwanThe static and dynamic performances of a machine tool structure are considered to constitute the primary factors affecting the load-carrying capacity, geometric accuracy and surface precision of the workpiece. The machining performance of a large machine tool under stable conditions is effectively determined by its dynamic response to the cutting force at low-frequency excitation. This study, therefore, investigated the static and dynamic characteristics of a large heavy-duty lathe machine tool in which the headstock and tailstock comprised critical component modules supporting a large workpiece during low-speed machining. Using a finite element model, the influences of the structural modules on the static and dynamic characteristics of the lathe were analyzed, considering the effects of the workpiece load. The results indicated that the fundamental vibration modes of the lathe were primarily dominated by headstock, tailstock, and workpiece behaviors. The maximum compliances of the lathe under the rated load were found to occur at relatively low frequencies (22, 40.7, and 82.7 Hz) and increase with the reduction in workpiece weight. Notably, these modal frequencies were significantly higher than the maximum rotational speed of the spindle (450 rpm). In addition, the dynamic rigidity corresponding to the rated speed was higher than that induced at the natural frequency. These results indicate that the subject lathe possesses sufficient capacity to sustain the cutting load during stable turning machining. This study can, therefore, help designers improve the performance of machine tools for future fabrication.https://www.mdpi.com/2079-3197/10/12/207dynamic rigidityfrequency response functionlarge heavy-duty lathefive-axis turning-milling machine |
| spellingShingle | Chien-Yu Lin Yuan-Ping Luh Wei-Zhu Lin Bo-Chen Lin Jui-Pin Hung Modeling the Static and Dynamic Behaviors of a Large Heavy-Duty Lathe Machine under Rated Loads Computation dynamic rigidity frequency response function large heavy-duty lathe five-axis turning-milling machine |
| title | Modeling the Static and Dynamic Behaviors of a Large Heavy-Duty Lathe Machine under Rated Loads |
| title_full | Modeling the Static and Dynamic Behaviors of a Large Heavy-Duty Lathe Machine under Rated Loads |
| title_fullStr | Modeling the Static and Dynamic Behaviors of a Large Heavy-Duty Lathe Machine under Rated Loads |
| title_full_unstemmed | Modeling the Static and Dynamic Behaviors of a Large Heavy-Duty Lathe Machine under Rated Loads |
| title_short | Modeling the Static and Dynamic Behaviors of a Large Heavy-Duty Lathe Machine under Rated Loads |
| title_sort | modeling the static and dynamic behaviors of a large heavy duty lathe machine under rated loads |
| topic | dynamic rigidity frequency response function large heavy-duty lathe five-axis turning-milling machine |
| url | https://www.mdpi.com/2079-3197/10/12/207 |
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