Giasin Khaled, Ayvar-Soberanis Sabino
Composite Systems Innovation Centre, Department of Mechanical Engineering, University of Sheffield, Sheffield S1 3JD, UK.
Advanced Manufacturing Research Centre, Wallis Way, Catcliffe, Rotherham S60 5TZ, UK.
Materials (Basel). 2016 Jul 28;9(8):622. doi: 10.3390/ma9080622.
The rise in cutting temperatures during the machining process can influence the final quality of the machined part. The impact of cutting temperatures is more critical when machining composite-metal stacks and fiber metal laminates due to the stacking nature of those hybrids which subjects the composite to heat from direct contact with metallic part of the stack and the evacuated hot chips. In this paper, the workpiece surface temperature of two grades of fiber metal laminates commercially know as GLARE is investigated. An experimental study was carried out using thermocouples and infrared thermography to determine the emissivity of the upper, lower and side surfaces of GLARE laminates. In addition, infrared thermography was used to determine the maximum temperature of the bottom surface of machined holes during drilling GLARE under dry and minimum quantity lubrication (MQL) cooling conditions under different cutting parameters. The results showed that during the machining process, the workpiece surface temperature increased with the increase in feed rate and fiber orientation influenced the developed temperature in the laminate.
加工过程中切削温度的升高会影响加工零件的最终质量。在加工复合金属叠层和纤维金属层压板时，切削温度的影响更为关键，这是由于这些复合材料的堆叠特性，使复合材料直接与叠层的金属部分和排出的热切屑接触而受热。本文研究了两种商业上称为GLARE的纤维金属层压板的工件表面温度。使用热电偶和红外热成像技术进行了一项实验研究，以确定GLARE层压板上表面、下表面和侧面的发射率。此外，在不同切削参数下，在干式和微量润滑（MQL）冷却条件下对GLARE进行钻孔时，使用红外热成像技术确定加工孔底面的最高温度。结果表明，在加工过程中，工件表面温度随着进给速度的增加而升高，纤维取向会影响层压板中产生的温度。
