Effect of Tool Wear on Hole Quality in Drilling of Carbon Fiber Reinforced Plastic-Titanium Stacks Using Tungsten Carbide and PCD Tools
Effect of Tool Wear on Hole Quality in Drilling of Carbon Fiber Reinforced Plastic-Titanium Stacks Using Tungsten Carbide and PCD Tools
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DOI：
10.1115/msec2015-9364
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发表时间：
2015-06
期刊：
影响因子：
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通讯作者：
Dave Kim;A. Beal;P. Kwon
中科院分区：
文献类型：
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作者：
Dave Kim;A. Beal;P. Kwon
综述了碳纤维增强塑料（CFRP）-钛（Ti）复合板在硬质合金（WC）和多晶金刚石（PCD）麻花钻钻削过程中孔缺陷的性质，并对孔缺陷产生的原因进行了假设。描述CFRP-Ti堆叠的孔质量的参数包括CFRP进入孔分层、孔径和圆度、内孔表面粗糙度、CFRP孔轮廓、CFRP-Ti板间损坏和Ti出口毛刺。它们是由钻孔过程中产生的热量以及热钛切屑和粘附、钛毛刺形成、刀具不稳定性和刀具磨损导致的刀具几何形状变化引起的。对于WC钻头，在高主轴转速条件下发生大的后刀面磨损和边缘磨损，导致孔尺寸减小，孔圆度增加和CFRP-Ti界面损伤。在低主轴转速条件下，由于大的边缘圆化，刀具几何形状发生了变化。这导致在CFRP孔表面的大纤维拔出。钛进入导致损伤与纤维去除和基体变色在底部的CFRP面板和这种板间损坏被观察到增加与工具磨损。在相同的速度条件下，与WC刀具相比，PCD钻头在所有参数下都能保持相对较小的孔缺陷。Copyright © 2015 by ASME
This paper reviews the nature of hole defects and postulates the cause of hole defects resulting from the drilling process of Carbon Fiber Reinforced Plastic (CFRP)-Titanium (Ti) stacked panels using tungsten carbide (WC) and polycrystalline diamond (PCD) twist drills. The parameters that describe the hole quality of the CFRP-Ti stacks include CFRP entry hole delamination, hole diameter and roundness, inner hole surface roughness, CFRP hole profile, CFRP-Ti inter-plate damage, and Ti exit burr. They are caused by heat generation during drilling as well as hot Ti chips and adhesion, Ti burr formation, tool instability, and tool geometry change due to tool wear. For the WC drills, large flank wear and margin wear occurred at the high spindle speed condition, resulting in a reduction of the hole size and an increase of the hole roundness and CFRP-Ti interface damage. At the low spindle speed condition, tool geometry was changed due to the large edge rounding. This resulted in large fiber pull-out at the CFRP hole surface. Ti entry burrs caused damage associated with fiber removal and matrix discoloring at the bottom of the CFRP panel and this inter-plate damage was observed to increase with tool wear. When compared with the WC tool at the same speed condition, the PCD drill maintained relatively small hole defects under all parameters.Copyright © 2015 by ASME