Study on the 3D Pattern of Hole Wall in Drilling Carbon Fiber Reinforced Plastics Using Orthogonal Experiment

2014 ◽  
Vol 902 ◽  
pp. 58-62
Author(s):  
Xue Lin Li ◽  
Gui Yu Li ◽  
Xing Quan Li
Keyword(s):  
Carbon Fiber ◽  
Orthogonal Experiment ◽  
Spindle Speed ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Hole Wall ◽  
Drilling Quality ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

The drilling damage forms of hole wall is presented and the reasons for drilling quality are analyzed in drilling carbon fiber reinforced plastics. Based on the study of experiments, the relationship between the drilling damage and the drilling parameters are obtained. The results indicate that the drilling hole wall forms drawn fiber and fallen off fiber bundle more easily and the surface roughness of hole wall becomes worse with the increase of the spindle speed, and the final drilling surface presents obvious anisotropy. In order to obtain good drilling quality, lower spindle speed should be selected on the premise of lower feed rate.

Studies on Disfigurement-Fee Technology of Drilling Carbon Fiber Reinforced Plastics

2007 ◽  
Vol 24-25 ◽  
pp. 125-132
Author(s):  
Yong Qi Wang ◽  
Yong Jie Bao ◽  
Hang Gao
Keyword(s):  
Carbon Fiber ◽  
Drilling Process ◽  
Fiber Reinforced ◽  
Drilling Force ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Drilling Quality ◽  
New Type ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

Based on the analysis of various disfigurements of carbon fiber reinforced plastics formed in drilling process, the formation model of disfigurement is built up, and analysis results shows that the main reason of disfigurement is the exceeding cutting force. By focusing on these problems, new-type drill—super-hard electroplated abrasive drill is developed, and some experiments were carried out. Compared with the traditional sintered-carbide drill in drilling, the super-hard electroplated abrasive drill has lower drilling force, better drilling quality, higher machining efficiency, and longer life-span. A conclusion that super-hard electroplated drill is more suitable for drilling CFRP is gained.

scholarly journals Study of Complex Helical Drill with a “S” Type Chisel Edge Tip Orient to Carbon Fiber Reinforced Plastics

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Yu He ◽  
Xiaolong Zhou ◽  
Ping Zou ◽  
Kun Liu
Keyword(s):  
Carbon Fiber ◽  
Axial Force ◽  
Great Influence ◽  
Spindle Speed ◽  
Drill Bit ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

In this paper, a complex helicoids’ drill tip of “S” type chisel edge grinded with a three-parallel universal CNC grinding machine tool is carefully studied to obtain the optimum drill bit tip geometry parameters. The effects of experimental parameters, such as apex angle, chisel edge incline angle, and structure circumference rear angle, on the quality of the drilling hole and the machining force were studied from the orthogonal experiment compared with the ordinary drill bit. The range of technological parameters are confirmed which should be used during the drilling process of carbon fiber reinforced plastics (CFRP) in order to realize the reduction of cutting defects such as cutting force and spurs. The effect of spindle speed and feed on the drilling behaviour of the experiment using optimum complex helicoids’ drill tip is also analyzed. It is found that the feed has a great influence on the drilling axial force and the spindle speed has little influence on axial force, but great influence on torque.

CFRP Drilling with Brazed Diamond Core Drill

2011 ◽  
Vol 175 ◽  
pp. 27-32 ◽  
Author(s):  
Juan Mu ◽  
Jiu Hua Xu ◽  
Yan Chen ◽  
Yu Can Fu
Keyword(s):  
Carbon Fiber ◽  
Thrust Force ◽  
Fiber Reinforced ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Drilling Quality ◽  
Near Net Shape ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

Despite the facts that carbon fiber reinforced plastics (CFRP) components are mostly produced near net shape, machining, especially drilling is often required in order to bring the component into dimensional requirements and prepare it for assembly. Rapid drill wear and serious machining defects are the key problems in CFRP drilling, and employing proper drill is an effective way to solve these problems. In this paper, tests of the brazed diamond core drill are presented and the related issues, such as the thrust force, the drilling quality and the drill wear are studied.

INCREASING SENSITIVITY OF EDDY CURRENT NON-DESTRUCTIVE TESTING OF DELAMINATION IN CARBON-FIBER REINFORCED PLASTICS

2021 ◽  
pp. 28-37
Author(s):  
P. N. Shkatov ◽  
G. A. Didin ◽  
A. A. Ermolaev
Keyword(s):  
Carbon Fiber ◽  
Eddy Current ◽  
Calculation Model ◽  
Fiber Reinforced ◽  
Destructive Testing ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced ◽  
The Difference

The paper is concerned with increasing sensitivity of eddy current nondestructive testing of most dangerous delamination in carbon-fiber reinforced plastics (CFRP). Increased sensitivity is achieved by separate registration and comparison of eddy current signals obtained from a set of stratifications of carbon fibers with the same orientation. The separation of eddy current signals is possible due to pronounced anisotropy of the electrical conductivity of the layers dominant in the direction of the fibers of the corresponding layer. Eddy-current signals are registered by eddy current probes with maximum sensitivity in a given angular direction. Prior to the scan eddy current signals of the probe are leveled on a defect-free area. The influence of the working gap on the difference between the eddy current signals of the probe is suppressed by normalizing it according to one of the signals. The analysis of the registered signals from delamination has been performed using an approximate calculation model. The reliability of the obtained results has been confirmed by comparison with experimental results and calculations using the finite element method.

Rotary Ultrasonic Machining: Effects of Tool End Angle on Delamination of CFRP Drilling

2017 ◽  
Author(s):  
Palamandadige K. S. C. Fernando ◽  
Meng (Peter) Zhang ◽  
Zhijian Pei ◽  
Weilong Cong
Keyword(s):  
Carbon Fiber ◽  
Material Removal ◽  
Ultrasonic Machining ◽  
Fiber Reinforced ◽  
Rotary Ultrasonic Machining ◽  
Carbon Fiber Reinforced Plastics ◽  
Reinforced Plastics ◽  
Hole Making ◽  
Fiber Reinforced Plastics ◽  
Carbon Fiber Reinforced

Aerospace, automotive and sporting goods manufacturing industries have more interest on carbon fiber reinforced plastics due to its superior properties, such as lower density than aluminum; higher strength than high-strength metals; higher stiffness than titanium etc. Rotary ultrasonic machining is a hybrid machining process that combines the material removal mechanisms of diamond abrasive grinding and ultrasonic machining. Hole-making is the most common machining operation done on carbon fiber reinforced plastics, where delamination is a major issue. Delamination reduces structural integrity and increases assembly tolerance, which leads to rejection of a part or a component. Comparatively, rotary ultrasonic machining has been successfully applied to hole-making in carbon fiber reinforced plastics. As reported in the literature, rotary ultrasonic machining is superior to twist drilling of carbon fiber reinforced plastics in six aspects: cutting force, torque, surface roughness, delamination, tool life, and material removal rate. This paper investigates the effects of tool end angle on delamination in rotary ultrasonic machining of carbon fiber reinforced plastics. Several investigators have cited thrust force as a major cause for delamination. Eventhogh, it is found on this investigation, tool end angle has more significant influence on the delamination in rotary ultrasonic machining of carbon fiber reinforced plastics comparing to cutting force and torque.

Sign in / Sign up

Export Citation Format

Share Document