Dynamic Characteristics on Single-Tooth Rock Cutting Considering the Change of Extrusion Zone Height
To analyze the dynamic characteristics of single-tooth rock-cutting behavior, this paper proposes that the height of the extrusion zone (<i>h</i><sub>c</sub>) is not constant and does not equal the cutting depth in real rock-cutting behavior, and introduces a new dynamic cutt...
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2025-03-01
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| author | Yanbo Hu Guofeng Li Ning Li |
| author_facet | Yanbo Hu Guofeng Li Ning Li |
| author_sort | Yanbo Hu |
| collection | DOAJ |
| description | To analyze the dynamic characteristics of single-tooth rock-cutting behavior, this paper proposes that the height of the extrusion zone (<i>h</i><sub>c</sub>) is not constant and does not equal the cutting depth in real rock-cutting behavior, and introduces a new dynamic cutting model (NDCM). By analyzing the single-tooth rock-cutting process, the concepts of the single cutting process and cutting frequency (<i>f<sub>c</sub></i>) are defined. A method for determining <i>f<b><sub>c</sub></b></i> based on the tangential cutting force (<i>F</i><sub>c</sub><sup>t</sup>) is also proposed. A series of single-tooth rock-cutting tests were conducted using numerical simulation, and the influence of rake angle (<i>a</i>), cutting speed (<i>v</i>), and cutting depth (<i>h</i>) on <i>f<sub>c</sub></i> was analyzed. The geometric difference coefficient (<i>GDC</i>) is introduced in the new dynamic cutting model, defined as the ratio of <i>h</i><sub>c</sub> to <i>h</i>. The determination method of <i>GDC</i> and its relationship with cutting parameters are explored from both theoretical and experimental perspectives. The results show that the cutting frequency corresponds to the main frequency of the tangential cutting force. <i>f<sub>c</sub></i> is linearly proportional to <i>v</i> and decreases nonlinearly with increasing <i>h</i>, while the rake angle has little effect on cutting frequency within the range of 10–20°. <i>h<sub>c</sub></i> exhibits a nonlinear relationship with <i>h</i>: when the cutting depth is small, <i>GDC</i> is close to 1.0; as <i>h</i> increases, <i>GDC</i> gradually decreases and eventually stabilizes, which aligns with experimental findings. The results of this study provide valuable insights for engineers to better understand the dynamic characteristics of tool–rock interaction in single-tooth rock cutting and offer new perspectives for applying cutting force and optimizing rock-cutting models. |
| format | Article |
| id | doaj-art-0f22daa03c3a4c08be626d5d94d3083d |
| institution | DOAJ |
| issn | 2076-3417 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj-art-0f22daa03c3a4c08be626d5d94d3083d2025-08-20T03:08:44ZengMDPI AGApplied Sciences2076-34172025-03-01157363010.3390/app15073630Dynamic Characteristics on Single-Tooth Rock Cutting Considering the Change of Extrusion Zone HeightYanbo Hu0Guofeng Li1Ning Li2Institute of Geotechnical Engineering, Xi’an University of Technology, Xi’an 710048, ChinaState Key Laboratory of Eco-Hydraulics in Northwest Arid Region of China, Xi’an University of Technology, Xi’an 710048, ChinaInstitute of Geotechnical Engineering, Xi’an University of Technology, Xi’an 710048, ChinaTo analyze the dynamic characteristics of single-tooth rock-cutting behavior, this paper proposes that the height of the extrusion zone (<i>h</i><sub>c</sub>) is not constant and does not equal the cutting depth in real rock-cutting behavior, and introduces a new dynamic cutting model (NDCM). By analyzing the single-tooth rock-cutting process, the concepts of the single cutting process and cutting frequency (<i>f<sub>c</sub></i>) are defined. A method for determining <i>f<b><sub>c</sub></b></i> based on the tangential cutting force (<i>F</i><sub>c</sub><sup>t</sup>) is also proposed. A series of single-tooth rock-cutting tests were conducted using numerical simulation, and the influence of rake angle (<i>a</i>), cutting speed (<i>v</i>), and cutting depth (<i>h</i>) on <i>f<sub>c</sub></i> was analyzed. The geometric difference coefficient (<i>GDC</i>) is introduced in the new dynamic cutting model, defined as the ratio of <i>h</i><sub>c</sub> to <i>h</i>. The determination method of <i>GDC</i> and its relationship with cutting parameters are explored from both theoretical and experimental perspectives. The results show that the cutting frequency corresponds to the main frequency of the tangential cutting force. <i>f<sub>c</sub></i> is linearly proportional to <i>v</i> and decreases nonlinearly with increasing <i>h</i>, while the rake angle has little effect on cutting frequency within the range of 10–20°. <i>h<sub>c</sub></i> exhibits a nonlinear relationship with <i>h</i>: when the cutting depth is small, <i>GDC</i> is close to 1.0; as <i>h</i> increases, <i>GDC</i> gradually decreases and eventually stabilizes, which aligns with experimental findings. The results of this study provide valuable insights for engineers to better understand the dynamic characteristics of tool–rock interaction in single-tooth rock cutting and offer new perspectives for applying cutting force and optimizing rock-cutting models.https://www.mdpi.com/2076-3417/15/7/3630single-tooth rock cuttingextrusion zone heightnew dynamic cutting modelcutting frequencygeometric difference coefficient |
| spellingShingle | Yanbo Hu Guofeng Li Ning Li Dynamic Characteristics on Single-Tooth Rock Cutting Considering the Change of Extrusion Zone Height Applied Sciences single-tooth rock cutting extrusion zone height new dynamic cutting model cutting frequency geometric difference coefficient |
| title | Dynamic Characteristics on Single-Tooth Rock Cutting Considering the Change of Extrusion Zone Height |
| title_full | Dynamic Characteristics on Single-Tooth Rock Cutting Considering the Change of Extrusion Zone Height |
| title_fullStr | Dynamic Characteristics on Single-Tooth Rock Cutting Considering the Change of Extrusion Zone Height |
| title_full_unstemmed | Dynamic Characteristics on Single-Tooth Rock Cutting Considering the Change of Extrusion Zone Height |
| title_short | Dynamic Characteristics on Single-Tooth Rock Cutting Considering the Change of Extrusion Zone Height |
| title_sort | dynamic characteristics on single tooth rock cutting considering the change of extrusion zone height |
| topic | single-tooth rock cutting extrusion zone height new dynamic cutting model cutting frequency geometric difference coefficient |
| url | https://www.mdpi.com/2076-3417/15/7/3630 |
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