Modeling and experimental verification of chip evacuation forces in cortical bone drilling.
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| Title: | Modeling and experimental verification of chip evacuation forces in cortical bone drilling. |
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| Authors: | Sui, Jianbo1 (AUTHOR) jianbo_sui@hotmail.com, Jiang, Yiping1 (AUTHOR), Wei, Qunfang1 (AUTHOR), Sheng, Peizhe1 (AUTHOR), Luo, Jiaqi1 (AUTHOR), Du, Cezhi1 (AUTHOR), Wang, Chengyong1 (AUTHOR) |
| Source: | Machining Science & Technology. 2025, Vol. 29 Issue 4, p605-622. 18p. |
| Subjects: | Compact bone, Osteonecrosis, Thrust, Friction, Torque |
| Abstract: | Excessively increased drilling forces due to poor chip evacuation have increased the risk of drill bit breakage and thermal necrosis of bone tissue. To evaluate chip evacuation on the force increase, an improved force model is proposed to predict the chip evacuation forces for bone drilling operations. First, the bone chips generated in the drill flutes are considered granular solids, and the chip evacuation force model is determined from normal and lateral pressures on a differential chip element. Then, a calibration experiment is designed to determine the two required coefficients of friction in the developed model for bovine cortical bone. Finally, a set of drilling experiments with varied process parameters is conducted to validate the model. The results show that the two coefficients of friction are related to the tool and workpiece material combination and change with variable process parameters. The predicted chip evacuation forces by the model fit well with the experimental forces, with an average error of 8.28% for chip evacuation thrust force and 9.81% for chip evacuation torque. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | Excessively increased drilling forces due to poor chip evacuation have increased the risk of drill bit breakage and thermal necrosis of bone tissue. To evaluate chip evacuation on the force increase, an improved force model is proposed to predict the chip evacuation forces for bone drilling operations. First, the bone chips generated in the drill flutes are considered granular solids, and the chip evacuation force model is determined from normal and lateral pressures on a differential chip element. Then, a calibration experiment is designed to determine the two required coefficients of friction in the developed model for bovine cortical bone. Finally, a set of drilling experiments with varied process parameters is conducted to validate the model. The results show that the two coefficients of friction are related to the tool and workpiece material combination and change with variable process parameters. The predicted chip evacuation forces by the model fit well with the experimental forces, with an average error of 8.28% for chip evacuation thrust force and 9.81% for chip evacuation torque. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 10910344 |
| DOI: | 10.1080/10910344.2025.2507005 |
