Influence of drilling incidence angle on the drilling force distribution of pneumatic impactor
Abstract Pneumatic impactor is widely used in the drilling process of various medium and high hard rocks with poor drill ability. Currently, there is relatively little analysis on the impact of the inclination of the rock surface during the drilling process on the drilling efficiency and excavation...
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Nature Portfolio
2025-01-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-86071-2 |
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| author | Dongfang Li Zengyang Huang Haibin Lin Huiyi Zhu Wentao Fu Yujuan Deng |
| author_facet | Dongfang Li Zengyang Huang Haibin Lin Huiyi Zhu Wentao Fu Yujuan Deng |
| author_sort | Dongfang Li |
| collection | DOAJ |
| description | Abstract Pneumatic impactor is widely used in the drilling process of various medium and high hard rocks with poor drill ability. Currently, there is relatively little analysis on the impact of the inclination of the rock surface during the drilling process on the drilling efficiency and excavation capability of pneumatic impactors. Based on the dynamic theory of impact drilling and finite element method (FEM), the constitutive model of HJC criterion and INVENTOR 3D mechanical structure design software, a 3D numerical analysis system of piston-bit head-rock during pneumatic impactor drilling is established by ANSYS LS-DYNA, a nonlinear dynamic analysis software. The numerical results of drilling force at different incidence angles are analyzed in detail. For the rock without initial hole, the ratio of maximum to minimum drilling force under the conditions of considering incidence angle δ, only considering incidence angle β and considering both β and δ is 3.114, 3.161 and 3.873, respectively. For the rocks with initial holes, the ratio of maximum to minimum drilling force under the same and different incidence angles is 1.810 and 2.090, respectively. Through nonlinear fitting for numerical results, the corresponding fitting solution is obtained, and the relative error between fitting solution and numerical solution is analyzed to be between 11.72%~15.58%, which can meet the requirements of engineering application. The analysis results provide references for the mechanical structural optimization design and use of pneumatic impactor. |
| format | Article |
| id | doaj-art-dc2f52c8378445bba87fddb19cf84a72 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
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| spelling | doaj-art-dc2f52c8378445bba87fddb19cf84a722025-01-19T12:17:07ZengNature PortfolioScientific Reports2045-23222025-01-011511910.1038/s41598-025-86071-2Influence of drilling incidence angle on the drilling force distribution of pneumatic impactorDongfang Li0Zengyang Huang1Haibin Lin2Huiyi Zhu3Wentao Fu4Yujuan Deng5School of Mechanical and Electrical Engineering, Quzhou College of TechnologyQuzhou Institute of Measurement and Quality InspectionQuzhou Institute of Measurement and Quality InspectionSchool of Mechanical and Electrical Engineering, Quzhou College of TechnologyQuzhou Institute of Measurement and Quality InspectionSchool of Mechanical and Electrical Engineering, Quzhou College of TechnologyAbstract Pneumatic impactor is widely used in the drilling process of various medium and high hard rocks with poor drill ability. Currently, there is relatively little analysis on the impact of the inclination of the rock surface during the drilling process on the drilling efficiency and excavation capability of pneumatic impactors. Based on the dynamic theory of impact drilling and finite element method (FEM), the constitutive model of HJC criterion and INVENTOR 3D mechanical structure design software, a 3D numerical analysis system of piston-bit head-rock during pneumatic impactor drilling is established by ANSYS LS-DYNA, a nonlinear dynamic analysis software. The numerical results of drilling force at different incidence angles are analyzed in detail. For the rock without initial hole, the ratio of maximum to minimum drilling force under the conditions of considering incidence angle δ, only considering incidence angle β and considering both β and δ is 3.114, 3.161 and 3.873, respectively. For the rocks with initial holes, the ratio of maximum to minimum drilling force under the same and different incidence angles is 1.810 and 2.090, respectively. Through nonlinear fitting for numerical results, the corresponding fitting solution is obtained, and the relative error between fitting solution and numerical solution is analyzed to be between 11.72%~15.58%, which can meet the requirements of engineering application. The analysis results provide references for the mechanical structural optimization design and use of pneumatic impactor.https://doi.org/10.1038/s41598-025-86071-2Pneumatic impactorDrilling incidence angleDrillingNumerical analysisHJC criterionANSYS LS-DYNA |
| spellingShingle | Dongfang Li Zengyang Huang Haibin Lin Huiyi Zhu Wentao Fu Yujuan Deng Influence of drilling incidence angle on the drilling force distribution of pneumatic impactor Scientific Reports Pneumatic impactor Drilling incidence angle Drilling Numerical analysis HJC criterion ANSYS LS-DYNA |
| title | Influence of drilling incidence angle on the drilling force distribution of pneumatic impactor |
| title_full | Influence of drilling incidence angle on the drilling force distribution of pneumatic impactor |
| title_fullStr | Influence of drilling incidence angle on the drilling force distribution of pneumatic impactor |
| title_full_unstemmed | Influence of drilling incidence angle on the drilling force distribution of pneumatic impactor |
| title_short | Influence of drilling incidence angle on the drilling force distribution of pneumatic impactor |
| title_sort | influence of drilling incidence angle on the drilling force distribution of pneumatic impactor |
| topic | Pneumatic impactor Drilling incidence angle Drilling Numerical analysis HJC criterion ANSYS LS-DYNA |
| url | https://doi.org/10.1038/s41598-025-86071-2 |
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