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针对平纹编织碳纤维增强复合材料(CFRP)T型齿槽切出侧最外层纤维在切制过程中产生的缺陷,建立齿槽切出侧最外层纤维的切削模型,采用T型铣刀展开切制齿槽的试验,研究缺陷的形成机制。在切出侧最外层纤维的切削过程中,存在A、B两种情形,分别为纬向纤维的切削有经向纤维的支撑和无经向纤维的支撑。结果表明:随着每齿进给量的增大,齿槽切出侧最外层纤维的残余因子基本呈减小趋势,而分层因子呈增大趋势,且残余因子主要经历2次减小,依次包括A情形残余纬向纤维的减少和残余经向纤维的减少;B情形的残余纬向纤维普遍存在于每次试验中,但在A情形纤维被切除的适当每齿进给量区间内,部分B情形纤维能有效被切除;此外,采用细晶粒硬质合金刀具进行齿槽加工的每齿进给量选择在11.22μm/z~15.62μm/z区间内较为合适。试验结果与理论推导所反映的规律基本一致,该研究对每齿进给量的选取和缺陷的抑制具有指导意义。
A cutting model of the outermost layer of the cogging cutout side was established for the defects that occurred during the cutting of the outermost layer of the plain weave carbon fiber reinforced composite (CFRP) Cut the alveolar test to study the formation mechanism of defects. In the cutting side of the outermost fiber cutting process, there are A, B two cases, respectively, the latitudinal fiber cutting warp fiber support and non-directional fiber support. The results show that with the increase of feed per tooth, the residual factor of the outermost fiber on the cut side of the tooth groove decreases basically, while the stratification factor shows an increasing tendency, and the residual factor mainly undergoes two reductions , Which in turn includes the reduction in residual zonal fibers and the reduction in residual warp fibers in case A; the residual weft fibers in case B are ubiquitous in each test, but in the appropriate feed per tooth range where fiber is cut in case A , And the fiber in part B can be effectively excised. In addition, the feed rate per tooth per tooth for fine grooving carbide cutting tool is more suitable in the range of 11.22μm / z ~ 15.62μm / z. The test results are basically the same as those reflected in the theoretical derivation. This study is instructive in choosing the feed per tooth and suppressing the defects.