旋转超声钻削碳纤维复合材料钻削力和扭矩的研究

Research for Cutting Force and Torque in Rotary Ultrasonic Drilling of Carbon Fiber Reinforced Polymers

针对碳纤维增强树脂基复合材料(CFRP)加工过程中的问题,对金刚石套料钻旋转超声钻削CFRP-T700型复合材料展开了研究。研究发现,钻削力随主轴转速的增加具有减小的趋势,而扭矩则随着主轴转速的增加,呈现增大的趋势;与传统加工相比,旋转超声振动钻削可降低切削力及扭矩达56.6%和39.1%,有效抑制加工缺陷的产生。初步建立了切削力和扭矩之间的数学模型,并通过试验对切削力和扭矩之间的比例常数k加以验证。研究结果表明,旋转超声钻削CFRP在降低切削力和扭矩方面有较大优势。

Aiming at the problems in the processing of carbon fber reinforced polymers （CFRP）, the rotary ultrasonic drilling has been carried out on CFRP-T700 composites with the abrasive trepanning core tool. From the graphical analy-sis, the cutting force has been found decreased with the increase of spindle speed whereas the corresponding torque has been found increased with the increase of spindle speed. The decrease in cutting force and the corresponding torque values has been found up to 56.6% and 39.1%, respectively in comparison with conventional machining. The mathematical rela-tion of the cutting force and the torque has been been developed. The proportionality constant, k has been found between the cutting force and the torque has been found experimentally. The rotary ultrasonic drilling with trepanning tool is the essential need to reduce the cutting force and torque for machining of CFRP composites. This research can be applied for practical machining at the industry level.