Modulation-assisted machining of compacted graphite iron with coated carbide tool in dry condition
Modulation-assisted machining of compacted graphite iron with coated carbide tool in dry condition
复制标题
干燥条件下用涂层硬质合金刀具调制辅助加工蠕墨铸铁
DOI：
10.1016/j.mfglet.2022.07.058
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发表时间：
2022
影响因子：
3.9
通讯作者：
Guo, Yang
中科院分区：
文献类型：
--
作者：
Sandoval, Juan;Ali, Aaqib;Kwon, Patrick;Guo, Yang
蠕墨铸铁(CGI)具有优异的机械性能，是替代传统灰口铸铁(FGI)应用于柴油机机体的一种新材料。然而，CGI的广泛采用受到其可加工性差的阻碍，这反映在刀具的快速磨损，特别是在较高的切割速度下。在目前的工业实践中，CGI通常是以中低速度(<；200 m/min)用涂层硬质合金刀具加工的。研究了涂层硬质合金刀具干式车削CGI时，调制辅助加工对刀具磨损的影响。为了进行纵向车削实验，设计了一种新型的MAM车削装置。研究了在150、250和350m/min三种车削速度下，常规加工(CM)车削和MAM车削时的刀具磨损、切削力和刀具温度。结果表明，在较低的切割速度(150m/min)下，MAM的减磨效果不明显，但在较高的切割速度(250和350m/min)下，MAM的减磨效果非常显著。切削力和温度的结果与磨损结果可以很好地关联，揭示了力和温度对刀具磨损和铁粘着程度的依赖关系。这项研究证明了MAM在提高涂层硬质合金刀具加工CGI的生产率方面的潜力。研究结果也有助于更好地理解涂层硬质合金刀具切割CGI时的磨损机理。爱思唯尔有限公司出版。保留所有权利。
Compacted graphite iron (CGI) is a new material replacing conventional gray cast iron (FGI) for diesel engine block applications due to its superior mechanical properties. However, widespread adoption of CGI is hindered by its poor machinability, which is reflected by the rapid tool wear especially at higher cutting speeds. In current industrial practice, CGI is usually machined with coated carbide tools at low to medium speeds (< 200 m/min). This study investigates the effect of modulation-assisted machining (MAM) on tool wear in dry turning of CGI with coated carbide tool. A new MAM turning setup is implemented for conducting the longitudinal turning experiments. Tool wear, cutting forces and tool temperature are characterized for both conventional machining (CM) turning and MAM turning at three cutting speeds: 150, 250 and 350 m/min. The results show wear reduction by MAM is not significant at the low cutting speed (150 m/min), but it is quite significant at the higher cutting speeds (250 and 350 m/min). The cutting force and temperature results can be well correlated with the wear results, revealing the dependency of the forces and temperature on the tool wear and the severity of iron adhesion. This study demonstrates the potential of MAM in enhancing the productivity of machining CGI with the coated carbide tool. The results are also useful for better understanding the wear mechanism in cutting CGI with the coated carbide tool.© 2022 Society of Manufacturing Engineers (SME). Published by Elsevier Ltd. All rights reserved.