Jamil Muhammad, Khan Aqib Mashood, Mia Mozammel, Iqbal Asif, Gupta Munish Kumar, Sen Binayak
Mechanical, Manufacturing and Automation, Nanjing University of Aeronautics and Astronautics, Nanjing, China.
Industrial Manufacturing, University of Engineering and Technology Taxila, Taxila, Pakistan.
Proc Inst Mech Eng H. 2019 Oct;233(10):1024-1041. doi: 10.1177/0954411919865389. Epub 2019 Jul 26.
Achievement of low temperature, thrust force, and clean operating zone under with/without irrigation-assisted drilling is still a challenge in orthopedic surgery owing to substantial bone-tissue damage that extends the healing time. In order to mitigate the above challenges, a new micro-lubrication technique-a low-pressure cold mist impinged on the tool-bone joint interface and penetrating well into the bone surface to improve the cooling/lubrication efficiency-has been proposed in bone drilling. In this study, the aims are to characterize the effect of micro-cooling/lubrication on temperature and thrust force at different levels of cutting speed, feed rate, drill diameter, and coolant flow rate. For that purpose, a fresh calf bone was drilled through commercially available drill tool on three-axis mini-machine. The response surface methodology was applied to get the design of experiments, and the analysis of variance at p-values < 0.5 was used. Moreover, the empirical models were developed to examine the simultaneous effect of all the parameters on performance measures. The employed cooling-lubrication technology has shown a percentage reduction in temperature ranging from 34.3% to 48.3%, and 26.8%-35.9% under irrigation with respect to without-irrigation mode. For cutting force, these reductions are 13%-47.6% and 14.5%-44.2%, respectively. Furthermore, analysis of variance has highlighted the cutting speed and feed rate as the two most prominent parameters for temperature and thrust force under all the drilling modes. Relatively high-pressure cold mist in micro-lubrication has offered a lower temperature, thrust force, and clean operating zone under micro-lubrication mode than with/without-irrigation modes. Henceforth, the micro-lubrication technique has been found as a suitable cooling technique for drilling of bone in the viewpoint of temperature and thrust force.
在骨科手术中，无论有无冲洗辅助钻孔，要实现低温、推力以及清洁的操作区域仍然是一项挑战，因为大量的骨组织损伤会延长愈合时间。为了应对上述挑战，一种新的微润滑技术——将低压冷雾喷在刀具与骨的关节界面上，并能很好地渗透到骨表面以提高冷却/润滑效率——已被应用于骨钻孔中。在本研究中，目的是表征微冷却/润滑在不同切削速度、进给率、钻头直径和冷却液流速水平下对温度和推力的影响。为此，在三轴微型机床上使用市售钻头对新鲜小牛骨进行钻孔。应用响应面方法进行实验设计，并使用p值<0.5的方差分析。此外，还建立了经验模型来检验所有参数对性能指标的同时影响。所采用的冷却润滑技术在有冲洗模式下相对于无冲洗模式，温度降低百分比范围为34.3%至48.3%，切削力降低百分比范围为26.8%至35.9%。对于切削力，这些降低分别为13%至47.6%和14.5%至44.2%。此外，方差分析突出了切削速度和进给率是所有钻孔模式下温度和推力的两个最显著参数。与有/无冲洗模式相比，微润滑中相对较高压力的冷雾在微润滑模式下提供了更低的温度、推力和清洁的操作区域。因此，从温度和推力的角度来看，微润滑技术已被发现是一种适合骨钻孔的冷却技术。
